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DG419DY+ - 35Ω Precision CMOS SPDT Switch | Analog Devices
DG419DY+

DG419DY+ - 35Ω Precision CMOS SPDT Switch | Analog Devices

The Analog Devices DG419DY+ is a single-channel precision CMOS analog switch in an 8-SOIC package, configured as one SPDT or 2:1 multiplexer. Its headline ratings include a maximum on-resistance of 35 Ω, guaranteed on-resistance matching of 3 Ω maximum between switches, and on-resistance flatness of 4 Ω maximum over the signal range. The monolithic switch supports analog signal ranges from 10 V to 30 V and supply operation from 4.5 V to 20 V. An analog switch is an electronic routing component that connects or disconnects signal paths under digital control. The SPDT architecture transfers one common terminal between two switched terminals, making it suitable for signal selection, polarity routing, test-point isolation, and bidirectional signal-path control. As a precision CMOS switch, the DG419DY+ belongs to the interface IC and analog switch hierarchy while adding low power consumption and bidirectional operation. The DG419 family combines matched on-resistance, flat on-resistance behavior, low charge injection, and low power consumption. Maximum on-resistance matching of 3 Ω supports applications where closely matched paths reduce gain or timing errors. The specified on-resistance flatness of 4 Ω limits resistance variation as the analog voltage changes, which is valuable in precision measurement and signal-conditioning systems. The improved DG419 design also provides an ESD tolerance of 2000 V minimum under Method 3015.7. The switch operates bidirectionally, allowing signals to flow through the selected path in either direction. Its CMOS implementation supports low power dissipation without requiring a normally closed mechanical contactor. Charge injection can create transient errors when the control state changes, so systems using the switch for sampling or high-impedance measurements should account for control timing, source impedance, and downstream capacitance. Typical applications include precision test equipment, guidance and control systems, battery-powered instruments, data-acquisition front ends, and switching networks for low-frequency analog signals. The DG419DY+ is particularly appropriate when a compact 8-SOIC footprint, matched resistance, and low-noise switching are more important than the very low capacitance of specialized RF switch products. Use the manufacturer pin-description table when assigning PCB tracks and confirm the control polarity and terminal arrangement for the exact DG419DY+ orderable device. Keep the switched signal within the stated analog and supply ratings, provide a stable control reference, and account for charge injection when the switch changes state. This product page combines the DG419DY+ datasheet specifications, verified manufacturer and distributor sources, compatible replacement candidates, and application-oriented engineering guidance. It also distinguishes direct footprint alternatives from functional substitutes so engineers can assess drop-in replacement risk before modifying an existing analog switching circuit.

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DG419DY-T1-E3 - Precision CMOS SPDT Analog Switch | Vishay
DG419DY-T1-E3

DG419DY-T1-E3 - Precision CMOS SPDT Analog Switch | Vishay

The Vishay Siliconix DG419DY-T1-E3 is a single-pole double-throw (SPDT) precision monolithic CMOS analog switch that combines low power consumption with high switching speed and excellent signal integrity. Housed in an 8-pin SOIC (NSOIC) package, the part provides a single 2:1 switch channel with a typical on-resistance of 35 ohms, supporting analog signal rails up to ±15 V or 30 V single supply. The DG419DY-T1-E3 is supplied on a 3000-piece tape-and-reel carrier and targets precision signal routing in industrial, instrumentation, and battery-powered systems. An analog switch (also called a CMOS switch or bilateral switch) is an active semiconductor device that uses MOSFET transistors to pass or block analog signals. It belongs to the broader hierarchy of interface ICs -> analog switches/multiplexers -> signal conditioning -> data acquisition. Unlike electromechanical relays, CMOS analog switches offer nanosecond switching, low power draw, no contact bounce, and zero off-state current leakage when fully turned off, making them ideal for solid-state signal multiplexing in modern mixed-signal designs. Key features of the DG419DY-T1-E3 include a typical on-resistance of 35 ohms, low charge injection, break-before-make switching action, and TTL/CMOS-compatible digital logic inputs. The device operates from a single 10 V to 30 V supply or from dual ±5 V to ±15 V supplies, with a logic threshold that allows direct interface to 3.3 V or 5 V microcontrollers. Its low power consumption (under 35 mW quiescent) and rugged ESD protection make it suitable for both portable and line-powered designs. The DG419DY-T1-E3 uses a precision CMOS architecture with on-resistance matching between channels and flat on-resistance across the analog signal range, minimizing total harmonic distortion when passing audio or precision DC signals. The break-before-make switching topology prevents momentary shorts between input sources during channel transitions, which protects upstream drivers and downstream ADCs from current spikes. Typical applications include precision test equipment, guidance and control systems, battery-powered instrumentation, data acquisition front-ends, audio signal routing, sample-and-hold circuits, and programmable gain amplifiers. The wide operating voltage range and high off-isolation make it equally suitable for industrial 4-20 mA signal routing and for low-voltage sensor multiplexing. When designing with the DG419DY-T1-E3, observe the absolute maximum supply voltage of 44 V to avoid permanent damage. Place 0.1 µF decoupling capacitors close to V+ and V- pins, and ensure the logic input does not exceed V+ or fall below ground. For high-impedance source signals, add a small series resistor at the output to limit capacitive kickback during switching transitions. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, helping engineers select the right CMOS switch and validate its drop-in compatibility against the most popular Vishay, Maxim Integrated, and Texas Instruments equivalents.

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DG421CJ - Dual SPST Analog Switch | Analog Devices
DG421CJ

DG421CJ - Dual SPST Analog Switch | Analog Devices

The Analog Devices DG421CJ is a low-power CMOS analog switch containing two independently controlled SPST-NO switches, each with a maximum on-resistance of 35 ohms. The device is packaged in a 16-pin through-hole DIP and is specified for dual 15 V supply operation. Its latched control inputs support retained switch state and are suited to analog signal routing, instrumentation, test equipment, and industrial control systems. An analog switch is a semiconductor device that connects or isolates signal paths under digital control. The DG421CJ belongs to the analog switch hierarchy within multiplexers and interface ICs. Unlike a mechanical relay, it offers compact size, low switching power, and fast electronic control. Its normally open configuration provides a defined open state when a control input is deasserted, while the paired switches can route two independent channels or provide isolation between source and measurement circuitry. Key features include guaranteed on-resistance matching of 3 ohms maximum between switches and on-resistance flatness of 4 ohms maximum over the signal range. Typical on-resistance is 20 ohms, and the low-power CMOS design is intended to minimize power consumption in multi-switch systems. The 16-PDIP package uses a 0.300-inch, 7.62 mm body width and supports conventional through-hole PCB assembly rather than surface-mount reflow. The switch architecture provides independent control paths for two SPST-NO channels. Guaranteed matching between the two switches is useful when both devices must present similar resistance to sampled signals. Flatness limits resistance variation across the selected signal range, helping preserve measurement consistency when the source voltage changes. Low-power CMOS operation also makes the device appropriate for portable test and measurement systems where supply efficiency and predictable signal behavior are important. Typical uses include battery-powered instrumentation, automated test equipment, analog measurement front ends, sample-and-hold isolation networks, and industrial interface modules. The two channels can be used for measurement-source selection, signal isolation, or alternating access to two external circuits. In systems with higher voltage levels, designers must confirm the complete absolute-maximum and signal-range limits in the manufacturer datasheet before applying the switches outside the intended dual-supply domain. For PCB layout, place the device so its through-hole leads do not cross sensitive analog traces, and route switched signals away from clocks, relay drivers, and switching power converters. Use a common ground reference for control and analog circuitry. Because this legacy part is obsolete, production replacements should be qualified for pin compatibility, supply voltage, on-resistance, leakage current, switching speed, and temperature range rather than selected by package name alone. This product page organizes the DG421CJ technical characteristics, sourcing information, application guidance, and drop-in replacement assessment. It also distinguishes verified device capabilities from engineering checks that should be completed before approving any substitute in an existing analog signal path.

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DG421DJ - Low-Power Latched SPST CMOS Switch | Maxim
DG421DJ

DG421DJ - Low-Power Latched SPST CMOS Switch | Maxim

The Maxim Integrated DG421DJ is a low-power CMOS analog switch with latch, configured as a dual SPST switch and supplied in a 16-pin DIP package. Its headline characteristics include a typical on-resistance of 20 ohms, guaranteed on-resistance matching of 3 ohms maximum between switches, and guaranteed on-resistance flatness of 4 ohms maximum across the signal range. The device is intended for industrial-grade applications requiring low-power signal routing with controlled channel resistance. An analog switch is a semiconductor device that connects or disconnects an electrical signal path under digital control. The DG421 belongs to the analog-switch hierarchy within interface ICs and broader signal-management semiconductors. Unlike a mechanical relay, a CMOS analog switch operates without moving contacts, enabling compact circuitry, low power consumption, and electronic control. Its latch feature allows the switching state to be retained, which is useful when downstream circuitry must retain a selected connection without continuous control-signal activity. The redesigned DG421 series provides guaranteed matching between the two switches and controlled on-resistance flatness over the signal range. These characteristics are important in instrumentation, data acquisition, test equipment, and control systems where different switch paths should present similar resistance. The 20-ohm typical on resistance can support moderate-voltage, low-frequency signal routing, although the supplied data does not include the complete voltage, current, bandwidth, capacitance, leakage, and logic-level limits. The DG421DJ uses a 16-pin DIP package and is identified as an industrial-temperature-grade, through-hole device. Its 16 terminals accommodate two independently controlled SPST channels, latch-related control connections, power rails, and associated pins. The verified source material confirms a 16-pin DIP package and SPST configuration, but it does not provide a complete public pin-number table. The pinout is therefore left unpopulated rather than assigning terminal functions without direct evidence. Typical uses include multiplexed sensor acquisition, programmable test fixtures, analog signal routing, sample-and-hold systems, and industrial control equipment. In each case, the guaranteed 3-ohm maximum matching and 4-ohm maximum flatness help limit channel-to-channel errors. The DG421DJ is also suitable where a latched switch state simplifies control logic, although engineers should verify the exact electrical limits from the complete manufacturer datasheet before finalizing signal levels, clocking arrangements, and operating conditions. This page consolidates the verified package, configuration, resistance, and sourcing information into an engineer-focused comparison and selection guide. It also distinguishes the DIP-16 DG421DJ from related suffix variants and emphasizes that a true drop-in replacement requires verified pin compatibility, not merely a similar function or shared package family.

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DG423DJ+ - Triple SPDT CMOS Analog Switch | Analog Devices
DG423DJ+

DG423DJ+ - Triple SPDT CMOS Analog Switch | Analog Devices

Analog Devices DG423DJ+ is a low-power CMOS analog switch with latches, three independently controlled SPDT channels, a typical on-resistance of 20 ohm, and a 16-pin through-hole DIP package. The device supports low-power operation while maintaining a maximum on-resistance matching of 3 ohm between switches and maximum on-resistance flatness of 4 ohm across the signal range. A CMOS analog switch is a semiconductor device that routes electrical signals between circuit nodes under digital control. The DG423DJ+ belongs to the analog switch and switch-and-multiplexer hierarchy, where it functions as a low-power signal-routing interface between sensors, measurement circuits, amplifiers, converters, and digital control logic. Its latched control interface allows the selected signal path to remain stable while reducing repeated control activity. The DG423 family provides guaranteed on-resistance matching of 3 ohm maximum and on-resistance flatness of 4 ohm maximum. These characteristics are important when several channels must present similar resistance to downstream circuitry. Maximum charge injection is 15 pC, helping limit timing disturbance when control signals change the selected path. The switch also provides ESD tolerance of 2000 V minimum under Method 3015.7. The three SPDT channels give the device useful routing flexibility for test-point selection, signal-path switching, and sampling networks. Each channel can connect one common terminal to either of two selectable terminals, allowing a compact design to implement muxing, polarity selection, or source selection. Because the DG423DJ+ is packaged in a 16-pin DIP, it is also appropriate for prototypes, educational equipment, and through-hole industrial assemblies. Typical uses include multimeter and oscilloscope input routing, automated test systems, instrumentation signal conditioning, battery-powered measurement equipment, and industrial control interfaces. Latched operation can reduce control-bus activity in systems where the selected channel must persist between updates, although the exact latch and enable behavior should be confirmed in the manufacturer datasheet before final sequencing logic is designed. For new PCB layouts, the principal trade-off is package footprint rather than switching performance: the 16-pin DIP is easy to prototype but occupies more board area than a surface-mount alternative. Confirm signal levels, supply voltage, logic thresholds, switch logic, and absolute maximum ratings against the manufacturer datasheet before connecting external signals. This page consolidates the documented electrical characteristics, practical routing applications, drop-in comparison information, and PCB implementation guidance needed to evaluate the DG423DJ+ during component selection.

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DG425CY - 16-Pin CMOS Latching Analog Switch | Analog Devices
DG425CY

DG425CY - 16-Pin CMOS Latching Analog Switch | Analog Devices

The Analog Devices DG425CY is a low-power CMOS analog switch with latches, a dual DPST configuration, and a 16-pin SOIC package. Its headline characteristics include 20 Ω typical on-resistance, guaranteed on-resistance matching up to 3 Ω, on-resistance flatness up to 4 Ω across the signal range, and charge injection limited to 15 pC maximum. The switch is intended for low-power signal-routing systems where latched control, low charge injection, and low-power operation are important. An analog switch is a semiconductor device that routes electrical signals between input and output terminals under digital control. The DG425 belongs to the broader CMOS switch and multiplexer hierarchy, where multiplexer and demultiplexer functions determine which signal paths are connected. Its integrated latch retains the control state, reducing the need for continuously maintained control signals and helping lower system power consumption. The DG425 family also supports bidirectional signal conduction, allowing the selected paths to carry signals in either direction. The redesigned DG421, DG423, and DG425 devices provide guaranteed matching and flatness, making channel behavior more predictable than an unqualified resistance specification alone. The DG425CY combines these switch characteristics with a maximum charge injection of 15 pC and an ESD tolerance of at least 2000 V per Method 3015.7. These characteristics make the device useful where switching transients, channel mismatch, or ESD exposure could affect signal integrity. The CMOS implementation supports operation from dual supplies, including a -15 V to +20 V total supply span in the cited DG425CY-T technical data. Switching timing data cited for that ordering variant includes approximately 250 ns turn-on and 200 ns turn-off. Because DG425CY is a specific package and temperature-ordering variant of the DG425 family, engineers should verify the complete ordering code, supply limits, control logic, and electrical limits against the manufacturer datasheet before production release. Typical uses include battery-powered instrumentation, test-equipment signal routing, data-acquisition systems, communication equipment, and analog measurement circuits. The latching control is particularly useful when a selected measurement path must remain connected while the host processor sleeps. The device can also serve in circuits requiring a pair of independently latched double-pole paths for source, range, or channel selection. The principal design consideration is maintaining adequate logic-level compatibility across the complete supply range. Because control thresholds can change with VDD and VSS, external logic should not be assumed to remain compatible throughout every operating condition. PCB layout should keep analog traces short, provide a stable ground reference, and place bypass capacitors close to the supply pins. Designers should also evaluate injected charge against the input impedance and acquisition bandwidth of the downstream circuit. This page consolidates the verified manufacturer and distributor information for DG425CY with package details, application guidance, lifecycle considerations, and replacement qualification notes. It is intended to help engineers distinguish a true same-footprint replacement from a related family member whose latch configuration, temperature grade, package code, or electrical limits differ.

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DG425DJ - Low-Power CMOS Latched Analog Switch | Maxim Integrated
DG425DJ

DG425DJ - Low-Power CMOS Latched Analog Switch | Maxim Integrated

The Maxim Integrated DG425DJ is a low-power CMOS monolithic analog switch with latch control, supplied in a 16-pin DIP package. The device provides dual analog switching with a typical on-resistance of 20 Ω, guaranteed on-resistance matching between switches of 3 Ω maximum, and on-resistance flatness over the signal range of 4 Ω maximum. Its specified characteristics support signal-path routing in microprocessor-controlled analog and industrial systems. An analog switch is an electronic semiconductor device that routes electrical signals between circuit paths under digital control. CMOS analog switches combine low power consumption with high input impedance and bidirectional signal conduction. The DG425 family belongs to the analog switch and multiplexer hierarchy, where switches select or isolate analog signals while multiplexers combine multiple inputs into a common output. The latched control interface allows the selected signal path to remain in its commanded state without continuous control activity. The DG425DJ offers equal on-resistance matching between switches, with the manufacturer specifying 3 Ω maximum. Its typical on-resistance is 20 Ω, while flatness across the signal range is limited to 4 Ω maximum. These matching and flatness characteristics reduce channel-dependent gain and timing differences when the device is used for precision signal selection. The switch also provides bidirectional conduction, making it suitable for signal paths where the source direction can change. Charge injection is limited to 15 pC maximum, a useful specification when the switch controls sampled or held analog signals. The device provides ESD tolerance of at least 2000 V under Method 3015.7. Off leakage is specified below 5 nA at +85 °C, supporting isolation between inactive and active channels. Latch timing values include tWW of 200 ns maximum, tDW of 100 ns maximum, and tWD of 100 ns maximum. Typical applications include microprocessor-controlled signal routing, test and measurement systems, industrial control interfaces, data acquisition equipment, and analog signal multiplexing. The latch allows firmware or hardware control logic to establish a connection and then reduce switching-control activity, provided the selected state is not affected by later pulses. When laying out a DG425DJ circuit, route sensitive signals with short traces and provide a stable ground reference. Keep latch-control traces away from analog inputs because coupling from fast digital transitions can disturb held nodes or inject charge into downstream amplifiers. Confirm signal amplitude, bandwidth, leakage, and logic levels against the complete manufacturer datasheet before production use. This page combines the verified DG425DJ manufacturer and distributor information with explicit data-gap markers, application guidance, family comparisons, and selection advice. It does not substitute estimated electrical specifications for values absent from the retrieved source data.

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DG441 - Quad SPST NC CMOS Analog Switch | Analog Devices
DG441

DG441 - Quad SPST NC CMOS Analog Switch | Analog Devices

The Analog Devices DG441 is a monolithic quad SPST (normally closed) CMOS analog switch containing four independent single-pole single-throw switches with TTL and CMOS compatible digital inputs and an internal voltage reference for logic thresholds, housed in 16-pin DIP and SOIC packages. It is specified as a drop-in replacement for the popular DG201A and DG202 series switch sockets. An analog switch is an electronically controlled relay built on CMOS transmission-gate technology: a logic-level control input opens or closes a bidirectional signal path that conducts equally well in either direction. Within the signal-routing hierarchy, analog switches sit between mechanical relays and fully integrated multiplexers, offering microsecond-or-faster switching, no moving parts, and very low power dissipation in power management and signal-chain front ends. Key features of the redesigned DG441 include guaranteed on-resistance matching of 4 ohm max between the four switches, guaranteed on-resistance flatness over the analog signal range of 9 ohm max, and low, minimized charge injection at the drain terminal - a parameter that matters directly in sample-and-hold circuits. Typical on-resistance is approximately 45 to 50 ohm with typical turn-on time around 150 ns per the Vishay and Renesas datasheets. Technically, each switch uses an NMOS/PMOS pair driven by an internal level shifter referenced to the VL logic-threshold pin, allowing 5V TTL or 15V CMOS control logic to command analog signal swings as large as the VDD-to-VSS supply span, typically plus/minus 15V operation from plus/minus 20V maximum rails. Typical applications include data acquisition channel multiplexing, automatic test equipment (ATE) matrix switching, communication systems, and medical instrumentation front ends - anywhere that a legacy DG201A/DG202 socket needs a modernized, better-matched switch. Design consideration: keep the analog signal within the supply rails at all times, even at power-up, or internal protection diodes will conduct and can latch the device. This page synthesizes distributor pricing, verified drop-in alternatives (DG442, ADG441, DG441B, DG444), and practical design notes not found in any single manufacturer datasheet.

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DG441CY+ - Quad SPST 85Ω Analog Switch | Analog Devices
DG441CY+

DG441CY+ - Quad SPST 85Ω Analog Switch | Analog Devices

Analog Devices DG441CY+ is an improved quad SPST analog switch IC with four independent normally closed switches, an 85 Ω maximum on-resistance specification, and a 16-pin narrow SOIC package. The device is designed for routing low-voltage analog or digital signals when a low on-resistance, controlled off-state behavior, and compact integration are required. Its four switches support a 1:1 multiplexing configuration according to the manufacturer and distributor product listings. An analog switch is a solid-state semiconductor device that uses control logic to connect or disconnect signals without mechanically moving electrical contacts. The DG441 belongs to the analog switch and multiplexer hierarchy: analog switch IC, multiplexer/demultiplexer IC, interface IC, and integrated circuit. Compared with mechanical relays, an integrated analog switch can operate faster, consume less space, and avoid mechanical contact wear, although its voltage and current ratings remain more restrictive. The manufacturer data sheet identifies four independent SPST switches, on-resistance matching of no more than 4 Ω, on-resistance flatness of no more than 9 Ω across the signal range, and equal conduction behavior in either direction. It also specifies low charge injection of no more than 10 pC, low power consumption of 1.65 mW, and ESD tolerance of at least 2,000 V. The distributor listing identifies the DG441CY+ as a 4-circuit, 1:1 switch with 85 Ω maximum on-resistance in a 16-SOIC package. The SPST topology provides one signal path per switch, while the normally closed state establishes the conduction path before a control input changes state. This makes the device useful for controlled grounding, signal isolation, test-point routing, sample-and-hold paths, and peripheral selection. The low on-resistance matching and flatness reduce gain or timing errors when multiple channels must conduct with consistent resistance. Typical uses include test and measurement systems, data-acquisition equipment, battery-powered instruments, audio and communications equipment, and industrial control systems. The compact 16-SOIC package simplifies board integration, while the quad-channel configuration can implement several switched signal paths in one device. System designers should still verify signal amplitude, bandwidth, leakage, control logic levels, and switch lifetime against the manufacturer data sheet. The principal design consideration is off-state isolation. Although the normally closed switches provide a defined default path, leakage and capacitance can still couple adjacent signals. Keep sensitive routing paths short, use an appropriate ground reference, and control the switches with logic levels compatible with the supply voltage. This page combines verified manufacturer and distributor information, package details, comparison data, and practical replacement guidance for engineers evaluating the DG441CY+.

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DG441DJ+ - Quad SPST Analog Switch | Vishay | 16-DIP
DG441DJ+

DG441DJ+ - Quad SPST Analog Switch | Vishay | 16-DIP

Vishay Intertechnology DG441DJ+ is a low-power, quad SPST CMOS analog switch with four independent 1:1 signal paths, 85 Ω typical on-resistance, and a 16-pin DIP package. It supports positive and negative analog supplies, with operating ranges of 10 V to 30 V for dual supply operation and 4.5 V to 20 V for single-supply operation. The device is designed for routing low-voltage analog signals where compact logic control, low power consumption, and bidirectional conduction are useful. An analog switch is a semiconductor device that connects or disconnects an analog signal path under digital control. A single-pole single-throw, or SPST, switch provides one independently controlled conducting path. As a CMOS analog switch, the DG441DJ+ belongs to the interface IC category and uses MOSFET structures to achieve low on-resistance, low leakage, and low control power. Unlike a mechanical relay, it switches much faster and consumes no sustained coil energy. Key electrical features include a low typical on-resistance of 85 Ω, on-resistance matching of 4 Ω maximum between switches, and on-resistance flatness of 9 Ω maximum over the signal range. The switch operates equally well in either direction. Low leakage of 80 pA and a switching time of 150 ns make it useful for precision signal routing, while the 16-pin DIP package supports conventional through-hole PCB assembly. The manufacturer documentation describes improved DG201A and DG202-series compatibility, TTL/CMOS-compatible control logic, and single-supply capability. Different versions of the family documentation list different power-consumption figures, including 0.2 mW in legacy family material and 1.65 mW in revised documentation; the applicable production datasheet should therefore govern final design decisions. The verified product listing identifies the DG441DJ+ as a quad SPST switch in a 16-pin DIP package. Typical uses include data-acquisition systems, sensor multiplexing, analog test equipment, sample-and-hold circuits, battery-powered instruments, and precision measurement front ends. The four independent switches can route four signals independently or be controlled in coordinated sequences. Because on-resistance can vary with signal voltage, analog engineers should account for the specified resistance and flatness when calculating gains and settling behavior. A key design consideration is the relationship between control levels and supply voltage. TTL/CMOS-compatible logic simplifies interfacing, but the selected supply configuration and input levels must remain within the manufacturer limits. The DIP package also requires adequate spacing around the leads for soldering and cleaning, while signal traces should remain short to minimize added capacitance and coupling during the 150 ns switching transition. This page consolidates manufacturer documentation, distributor identification, package information, and verified cross-reference information into an engineering-focused guide. It also distinguishes confirmed drop-in candidates from unsupported alternatives, making the comparison more useful than a basic distributor listing when PCB footprint, switch function, and supply compatibility must be verified before substitution.

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DG441DJZ - Quad SPST NC 85Ohm Analog Switch | Renesas
DG441DJZ

DG441DJZ - Quad SPST NC 85Ohm Analog Switch | Renesas

The Renesas Electronics DG441DJZ is a monolithic quad SPST normally-closed CMOS analog switch IC with 85 ohm maximum on-resistance, operating from a total supply range of 5V to 34V (typically +/-15V rails), housed in a 16-pin PDIP package. It contains four independent single-pole single-throw switches with TTL and CMOS compatible logic inputs and an internal voltage reference for logic thresholds. An analog switch is a semiconductor device that routes or blocks analog signal paths under digital control, sitting within the broader hierarchy of signal-switching devices: analog switch, multiplexer/demultiplexer family, and interface ICs. Quad SPST switches are favored where independent, per-channel on/off control of four signal lines is needed without combining channels into a common bus, as a conventional multiplexer would require. Key features of the DG441DJZ include four independently addressable normally-closed switches, 85 ohm guaranteed maximum on-resistance, TTL and CMOS logic compatibility across the full supply range, and drop-in compatibility with the popular DG201A and DG202 series devices. The DJZ suffix denotes the industrial temperature grade in a 16-pin plastic DIP package, supporting through-hole assembly for industrial and instrumentation designs. Architecturally, the DG441 family uses monolithic CMOS construction that conducts equally well in either signal direction, allowing bidirectional signal flow. An internal voltage reference stabilizes logic thresholds against supply variation, keeping switching thresholds deterministic when driven by TTL or CMOS logic over the specified operating range. Typical applications include precision test and measurement signal routing, industrial programmable logic controller (PLC) analog front ends, audio and video signal switching, sample-and-hold circuits, and communication equipment relay replacement where solid-state switching improves reliability and eliminates contact bounce. When designing with the DG441DJZ, observe supply sequencing and ensure signal swings stay within the supply rails to prevent latch-up; the normally-closed configuration means channels conduct at power-off logic states, which must be considered in fail-safe designs. This page synthesizes distributor pricing, drop-in alternative cross-references, and practical design notes not found in the manufacturer datasheet.

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DG441DY+ - 4-Channel SPST Analog Switch | Analog Devices
DG441DY+

DG441DY+ - 4-Channel SPST Analog Switch | Analog Devices

Analog Devices DG441DY+ is an improved quad SPST normally closed analog switch with four independent 1:1 channels, an 85 Ω maximum on-resistance, and a 16-SOIC package. It operates from 4.5 V to 20 V, supports dual supplies from 10 V to 30 V, and provides low charge injection of 10 pC maximum with power consumption of 1.65 mW. An analog switch is a semiconductor device that connects or disconnects signal paths under digital control. The DG441DY+ belongs to the analog-switch hierarchy, where it functions as an interface IC between low-power control logic and external analog signals. Its normally closed configuration provides a defined signal connection before the control input commands a change of state, making it useful in routing, sampling, test, and signal-isolation systems. The device uses four independent SPST-NC channels rather than a multiplexer arrangement. According to the Analog Devices DG441-DG442 datasheet, the redesigned DG441 family provides on-resistance matching of 4 Ω maximum between switches and on-resistance flatness of 9 Ω maximum over the signal range. Each channel conducts equally well in either direction, which supports signal-path designs where input and output roles may change. The DG441DY+ is specified for low power consumption of 1.65 mW and low charge injection of 10 pC maximum. Charge injection is important when switching precision, high-impedance analog nodes because control-clock energy can otherwise appear as an unwanted voltage step. The device also has an ESD tolerance of 2000 V minimum, providing a defined electrostatic-protection capability for exposed analog interfaces. Typical applications include battery-powered test equipment, data-acquisition systems, audio and measurement signal routing, industrial control interfaces, and precision sensor connections. Four independent switches in one 16-SOIC package reduce board area and permit several signal paths to be switched under a common control interface. The dual-supply capability also allows designers to switch bipolar signals when the system provides the required positive and negative rails. When designing a board around the DG441DY+, verify the normally closed signal state during power-up and ensure that every switched node remains within the specified 4.5 V to 20 V single-supply or 10 V to 30 V dual-supply limits. Use the manufacturer pinout and truth table for the exact DY package rather than assuming that a multiplexer's address and enable functions are present. This product data consolidates manufacturer specifications, current distributor availability, package details, and verified drop-in replacement information. It also provides application guidance and selection trade-offs that help engineers move from the datasheet to a production-ready PCB design.

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DG441DYZ - Quad SPST CMOS Analog Switch, 85Ω, 16-SOIC | Renesas
DG441DYZ

DG441DYZ - Quad SPST CMOS Analog Switch, 85Ω, 16-SOIC | Renesas

The Renesas DG441DYZ is a monolithic quad SPST (Single-Pole Single-Throw) CMOS analog switch in a 16-pin SOIC package, designed as a drop-in upgrade for legacy DG201A and DG202 series devices. It integrates four independent SPST switches with 85Ω on-resistance, TTL/CMOS-compatible digital inputs, and an on-chip voltage reference that drives the logic threshold translators. The device operates from a single +5V to +34V supply, from symmetrical ±5V to ±22V supplies, or from asymmetric rails bounded by a 44V maximum, allowing control of signals up to 40V peak-to-peak. An analog switch (also called a CMOS transmission gate or bilateral switch) is a solid-state device that uses MOSFET transistors to pass or block analog and digital signals with very low distortion. The DG441DYZ belongs to the SPST switch family, which functions like a mechanical relay but with faster switching speed, no contact bounce, low power consumption, and bounce-free operation. It sits inside the broader analog switch IC category, alongside multiplexers (MUX), demultiplexers (DEMUX), and cross-point switches, all of which are sub-categories of interface ICs used for signal routing in mixed-signal systems. Key features include 85Ω typical on-resistance, 250 ns turn-on time (tON), a -3 dB bandwidth of approximately 200 MHz, and sub-nanoamp leakage currents. The switch architecture uses a high-voltage silicon-gate CMOS process with an epitaxial layer that prevents latch-up, a reliability concern common to older CMOS analog switches. Each switch exhibits low charge injection, making the part suitable for sample-and-hold circuits and precision multiplexed data-acquisition front-ends. The DG441DYZ is widely deployed in industrial process control, instrumentation, automatic test equipment (ATE), battery-powered telemetry, communication systems, and audio/video signal routing. Its wide supply range, low on-resistance flatness across the signal range, and TTL-compatible logic make it a versatile replacement for electromechanical relays where reliability, size, and switching speed are design constraints. The 16-SOIC (0.154" / 3.90 mm body width) package is pin-compatible with legacy DG201A/DG202 SOIC footprints, allowing direct PCB drop-in upgrades. When designing with the DG441DYZ, observe absolute maximum signal ratings of 44V across the switch and ensure logic inputs do not exceed V+ plus 0.3V. For low-impedance sources, account for the 85Ω on-resistance and its flatness over the analog signal range; for high-impedance loads, the dominant error source is leakage rather than Ron. Always decouple the supply pins with a 0.1 µF ceramic capacitor placed as close to the device as possible to minimize digital-induced noise coupling into the analog path. This page consolidates distributor pricing, AEC-Q-free drop-in alternatives, and PCB-level design notes that extend beyond the Renesas datasheet's typical application circuits to help engineers choose the right analog switch family for production.

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DG442CJ+ - 85Ω Quad SPST Analog Switch | Maxim Integrated
DG442CJ+

DG442CJ+ - 85Ω Quad SPST Analog Switch | Maxim Integrated

The Maxim Integrated DG442CJ+ is a four-circuit, single-pole single-throw CMOS analog switch with an 85Ω on-resistance, 1:1 signal routing, normally open contacts, and a 16-pin PDIP package. The device supports bidirectional signal conduction, provides break-before-make switching, and is designed for analog multiplexing, demultiplexing, sample-and-hold, and general signal-routing applications where a compact through-hole quad switch is required. An analog switch is an electronic routing component that connects or disconnects signal paths under digital control. A SPST switch provides one selectable path, while the DG442CJ+ combines four independent switches in one IC. The normally open configuration leaves each path disconnected until its control signal activates it. Within the interface-IC hierarchy, this device is a CMOS analog switch that bridges external analog circuitry and control logic. The DG442CJ+ uses an 85Ω on-resistance and supports bidirectional operation. Maxim redesigned the DG441 and DG442 families to guarantee on-resistance matching of 4Ω maximum between switches and on-resistance flatness of 9Ω maximum over the signal range. These characteristics help reduce channel-to-channel error when several switched paths must present similar impedance to the source or load. Switching timing includes approximately 170ns and 250ns figures identified for the device family, while the listed off-leakage is 500pA. These characteristics make the switch suitable for moderate-bandwidth analog paths, particularly where low leakage matters more than sub-nanosecond switching performance. The device is identified as a commercial-grade, through-hole part in a rectangular 16-pin PDIP package measuring approximately 0.300 inch wide, or 7.62mm. Typical uses include test-equipment signal routing, precision measurement front ends, audio path selection, data acquisition systems, and industrial control interfaces. Four integrated switches reduce component count compared with four separate single-switch packages, while the parallel normally open structure simplifies channel isolation. The 85Ω impedance should be included in the source and load calculations because it can attenuate high-impedance signals and limit operation at higher frequencies. PCB design should preserve short analog traces, provide a solid ground reference, and keep switching-node capacitance away from sensitive input paths. Because the device is a normally open SPST switch, evaluate whether break-before-make behavior satisfies the application’s interruption requirements. Use the manufacturer pin-description table and typical application circuits when assigning control signals and confirming the connection sequence. This page combines package details, verified distributor records, drop-in replacement guidance, comparison parameters, and practical routing considerations to support faster component selection. It also distinguishes confirmed electrical and package facts from parameters that require confirmation in the manufacturer datasheet.

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DG442CY+ - 85Ω Quad SPST Analog Switch | Analog Devices
DG442CY+

DG442CY+ - 85Ω Quad SPST Analog Switch | Analog Devices

Analog Devices DG442CY+ is a four-circuit, normally open SPST CMOS analog switch with an 85Ω on-resistance, supplied in a 16-pin SOIC package. The device uses four independent 1:1 switches, supports bidirectional signal conduction, and provides matched on-resistance of 4Ω maximum between switches. Its guaranteed on-resistance flatness is 9Ω maximum over the signal range, helping preserve signal amplitude consistency across the four channels. An analog switch is a semiconductor interface that connects or isolates a signal path under digital control. The DG442CY+ belongs to the analog switch and multiplexer hierarchy, where multiplexers combine switching functions with channel-selection logic. Unlike mechanical relays, this CMOS implementation offers compact integration, fast electronic control, low charge injection of 10pC maximum, and low power consumption of 1.65mW. These characteristics make it useful where several independent analog signals must be routed on a compact circuit board. Key features include four normally open SPST channels, an 85Ω on-resistance, 4Ω maximum on-resistance matching between switches, and 9Ω maximum on-resistance flatness over the signal range. The switches conduct equally well in either direction, which simplifies routing design when the source and destination can alternate roles. Charge injection of 10pC maximum helps limit control-transition disturbance, while the low 1.65mW power consumption supports space-constrained and portable equipment. The DG442CY+ is implemented as a monolithic CMOS analog-switch circuit with four independent control paths. Its matched channel resistance reduces gain variation between similarly driven switches, while the controlled flatness limits amplitude distortion as the analog voltage changes. The bidirectional conduction characteristic allows the same device architecture to support source selection, signal isolation, test-point routing, and power-routing functions when voltage, current, and switching-transient limits remain acceptable. Typical applications include audio routing, test and measurement systems, instrumentation, industrial control interfaces, sample-and-hold isolation, and compact embedded signal-conditioning systems. In these applications, the four-channel architecture can route one control signal to four different destinations or isolate several test nodes without requiring four separate packages. Designers should still verify the complete operating-voltage, leakage-current, and switching-time limits against their signal range because those values are not included in the supplied verified excerpts. The primary design consideration is ensuring that switch operation, control-logic levels, and analog signal limits are compatible with the target system. Place the device close to the routed signals to minimize PCB trace capacitance and susceptibility to injection from adjacent switching circuitry. Use a defined ground reference and route control inputs away from sensitive analog nodes. Confirm power-supply sequencing and ensure signal voltages never exceed the device's absolute maximum ratings before enabling the switches. This product record combines the supplied manufacturer and distributor findings with structured comparisons, drop-in alternatives, and application-focused engineering guidance. It also distinguishes verified parameters from information still requiring confirmation from the complete DG441/DG442 datasheet, helping engineers make a defensible sourcing and design decision without converting unsupported assumptions into specifications.

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DG442DJ+ - Quad SPST 85Ω Analog Switch | Vishay Intertechnology
DG442DJ+

DG442DJ+ - Quad SPST 85Ω Analog Switch | Vishay Intertechnology

The Vishay Intertechnology DG442DJ+ is a monolithic quad SPST CMOS analog switch with four independent 1:1 circuits, an 85 Ω on-resistance, and a 16-pin PDIP package. It is designed for analog signal routing where four independently controlled switches are required within one package. The device uses CMOS-compatible control inputs and supports analog switching across signal ranges referenced in the manufacturer documentation. An analog switch is a semiconductor-controlled routing component that connects or disconnects analog signal paths. The DG442DJ belongs to the monolithic CMOS analog-switch hierarchy, where SPST describes one switch path per circuit and quad describes four independent channels. Unlike a multiplexer, each DG442 channel can operate independently rather than sharing a common internal signal path. Key features include four independent SPST switch circuits, an 85 Ω on-resistance, and 1:1 signal routing. The package is a 16-pin PDIP, allowing through-hole assembly and straightforward prototyping. The available product information identifies the DG441 and DG442 families as drop-in replacements for the popular DG201A and DG202 series, which helps engineers evaluate PCB reuse and upgrade paths. Internally, the DG442 uses a monolithic CMOS implementation to provide consistent switching behavior across the four channels. Each channel has a corresponding control input and common ground and power connections. Designers should consult the manufacturer datasheet for the exact control truth table, input and supply limits, switching timing, off-impedance, leakage, and absolute maximum ratings before finalizing a design. Typical uses include analog test systems, instrumentation, signal-conditioning modules, data-acquisition equipment, and industrial control circuits where multiple analog paths must be routed independently. Its four-channel arrangement can reduce component count when a design needs four SPST functions rather than four separate single switch packages. The primary design consideration is confirming that the DG442DJ+ control polarity and timing satisfy the receiving circuit. Because the verified source data does not provide a complete pin table, engineers should verify every connection against the manufacturer datasheet before PCB release. Input signals must also remain within the specified voltage limits. This page consolidates verified distributor information, compatible replacement data, package details, selection guidance, and practical design notes into one engineering-focused resource for the DG442DJ+.

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DG442DK - 85 Ohm Quad SPST Analog Switch | Maxim Integrated | 16-CDIP
DG442DK

DG442DK - 85 Ohm Quad SPST Analog Switch | Maxim Integrated | 16-CDIP

The Maxim Integrated DG442DK is a quad SPST analog switch IC with 85 ohm maximum on-resistance, 500 pA off-leakage current and 250 ns turn-on time, packaged in a 16-pin ceramic DIP (16-CDIP, 0.300 inch / 7.62 mm lead pitch). It provides four independent single-pole single-throw switches in a 1:1 configuration, each able to route a bipolar analog signal, and operates from a 15 V supply. What is an analog switch? An analog switch is a solid-state semiconductor device that steers analog signals between circuit nodes under digital control, with no moving contacts and near-zero off-state signal transfer. A single-pole single-throw (SPST) analog switch provides one conducting path that is opened or closed, and a quad SPST device like the DG442DK implements four such paths on one die. In the product hierarchy, an analog switch sits within analog multiplexers and demultiplexers, inside interface ICs, within the broader family of integrated circuits and semiconductors. The DG442DK is a discrete-control (no logic-enable) version, so each of the four paths is driven by its own external control signal. Key features of the DG442DK include a maximum on-resistance of 85 ohm with on-resistance matching between switches guaranteed to 4 ohm maximum, and on-resistance flatness over the signal range guaranteed to 9 ohm maximum. The matched and flat resistance characteristics mean all four channels attenuate the same signal equally, which is what makes the device usable in balanced multi-channel paths rather than only in single-channel routing. Off-leakage current of 500 pA keeps the off state effectively open for high-impedance sources, and the switch conducts equally well in either signal direction. The Maxim Integrated DG441/DG442 family was redesigned around improved on-resistance matching and guaranteed on-resistance flatness over the signal range, replacing older revision behavior where channel-to-channel Ron could drift more widely. Switching times of 250 ns turn-on and 170 ns turn-off place the part in the general-purpose, medium-speed class rather than the sub-10 ns RF or ultra-fast video switch categories, which keeps on-resistance and leakage low while remaining inexpensive and easy to drive from standard logic. Typical applications include signal multiplexing in automated test and measurement equipment, audio and instrumentation channel selection, sample-and-hold and guarded-input amplifier front ends, and battery-powered sensor interface boards where the 500 pA off leakage protects the source from loading. Because the switches are independent, four different signal paths can be routed simultaneously to four different destinations. One key design consideration is that each switch has no on-board enable logic, so control drive levels and timing are entirely set by the host logic. Because the ceramic DIP package provides long leads, it also tolerates higher applied signal voltages relative to the 15 V supply in many analog-routing applications, but the signal range must always remain inside the absolute maximum ratings given in the manufacturer datasheet. This page consolidates package details, switching characteristics, drop-in source options and practical layout guidance for the DG442DK, adding engineering context that is not present in the raw manufacturer datasheet listings.

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DG444CJ+ - 4-Channel SPST Analog Switch | Analog Devices
DG444CJ+

DG444CJ+ - 4-Channel SPST Analog Switch | Analog Devices

The Analog Devices DG444CJ+ is an improved quad SPST analog switch with four independently controlled channels, an 85 ohm maximum on-resistance, and a 16-pin PDIP package. It is designed for low-power analog signal routing and supports positive supplies from 10 V to 30 V and dual supplies from ±4.5 V to ±20 V according to the manufacturer datasheet. The normally closed configuration routes the selected external signal to the common terminal when the corresponding control input is low. An analog switch is a semiconductor device that connects or disconnects signal paths under digital control. The DG444CJ+ belongs to the analog switch hierarchy, where analog switches form part of interface ICs used for routing, sampling, test, measurement, and communication signals. Its quad-channel architecture allows four switches to share one IC while retaining individual control signals, reducing component count compared with four discrete single-channel switches. The redesigned DG444 family provides low on-resistance matching between switches of 4 ohm maximum and guaranteed on-resistance flatness over the signal range of 9 ohm maximum. These characteristics help minimize channel-to-channel resistance variation and distortion when multiple signals share the same switching network. The 85 ohm maximum on-resistance rating also makes the device suitable for circuits where moderate insertion resistance is acceptable. Each channel is configured as SPST, normally closed, and the switches conduct equally well in either signal direction. The symmetric behavior makes the DG444CJ+ useful when source and destination may swap roles, provided the designer accounts for the device's power dissipation and off-state isolation. The 16-pin PDIP package also favors through-hole prototyping, inspection, and socket-based assembly rather than compact surface-mount production. Typical uses include sample-and-hold systems, instrumentation, industrial control, communications equipment, test equipment, and audio or measurement signal routing. The DG444CJ+ is most appropriate when four independently controlled normally closed paths are required and an 85 ohm maximum on-resistance is sufficient for the application. For designs requiring lower resistance, smaller size, faster switching, or a different fault configuration, the system requirements should be checked against other analog-switch families rather than assuming pin compatibility. When laying out a design, keep sensitive signal paths short and provide adequate bypassing near the supply pins. Check the control-logic truth table, allowed input voltage range, and maximum switch current from the manufacturer datasheet. Because the device dissipates power as (VIN - VOUT) multiplied by current in the conducting state, analyze both channel and package heating at worst-case current. This page combines verified manufacturer and distributor information with pricing, package guidance, replacement analysis, and practical design notes to support component selection and PCB planning.

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DG444DJ+ - Quad SPST Analog Switch, 85 ohm, 16-DIP
DG444DJ+

DG444DJ+ - Quad SPST Analog Switch, 85 ohm, 16-DIP

The Analog Devices DG444DJ+ is a quad SPST CMOS analog switch with four independent normally open switches, an 85 ohm maximum on-resistance, and a 16-pin PDIP package. The device supports positive and negative supply voltages from ±4.5 V to ±20 V, corresponding to a 10 V to 30 V total supply range, and operates across the industrial temperature range. Its four channels can route bipolar analog signals while TTL- and CMOS-compatible control inputs simplify interfacing with digital control logic. An analog switch is a solid-state semiconductor device that connects or isolates circuit nodes under digital control. The DG444 belongs to the CMOS analog-switch family within the broader interface-IC hierarchy. Unlike mechanical relays, it operates without moving contacts, allowing faster switching, compact integration, and low control-power consumption. This quad SPST arrangement is useful wherever several independent analog paths must be sampled, routed, or isolated. Key features include four independent SPST channels, low on-resistance, low leakage, fast switching, low power consumption, and TTL/CMOS-compatible logic inputs. According to the manufacturer datasheet, the on-resistance matching between switches is limited to 4 ohms maximum, while guaranteed on-resistance flatness across the signal range is limited to 9 ohms maximum. These characteristics improve channel-to-channel consistency and reduce gain variation when the same switch type is used in multiple signal paths. The DG444 family is built to provide predictable operation in precision analog systems. On-resistance matching limits channel mismatch, while low leakage helps preserve weakly driven signals when a channel is disconnected. Fast switching action supports measurement, test, and sampling systems in which the control system must select a new source quickly. Because the switches are CMOS devices, control inputs can operate from standard digital logic families, allowing a microcontroller or programmable logic device to manage channel selection. Typical uses include sample-and-hold circuits, test and measurement systems, multiplexed instrumentation, battery-powered test equipment, and signal-routing modules. The four normally open switches can independently connect an external analog node to one of four internal or external destinations. In bidirectional signal paths, the switch conducts equally well in either direction, which supports measurement and audio-oriented circuits where the signal source may change. For PCB design, place the DG444DJ+ close to the routed analog nodes to minimize trace capacitance and pickup. Keep high-impedance paths short, provide a stable ground reference, and route digital control traces away from sensitive analog inputs. Check supply decoupling at the IC and ensure control signals remain within the datasheet limits during power-up and power-down. This page combines the DG444 family specifications, verified source links, same-package drop-in candidates, application guidance, and design considerations to help engineers evaluate the DG444DJ+ before integrating it into a new analog-routing design.

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DG444DY+ - 85 Ohm Quad SPST CMOS Analog Switch | Maxim
DG444DY+

DG444DY+ - 85 Ohm Quad SPST CMOS Analog Switch | Maxim

The Maxim Integrated DG444DY+ is a quad SPST CMOS analog switch with a maximum on-resistance of 85 ohm, four independent switch channels, and a 250 ns maximum on-time. The device is packaged in a 16-pin SOIC and uses TTL- and CMOS-compatible control inputs. Its four switches can route one analog or digital signal independently in either direction. An analog switch is a solid-state routing element that connects or disconnects signal paths under digital control. The DG444 belongs to the interface IC hierarchy, where analog switches sit above multiplexers, demultiplexers, and general-purpose signal-routing components. Unlike a mechanical relay, the DG444DY+ has no moving contacts, allowing fast switching, low power consumption, and compact integration into analog measurement, test, and communication equipment. Important DG444DY+ features include low on-resistance, low leakage, low power consumption, and low charge injection. According to the Vishay DG444 data sheet, the DG444 and DG445 families use a high-voltage silicon-gate process, while an epitaxial layer helps prevent latchup. The redesigned DG444 series also specifies on-resistance matching between switches of 4 ohm maximum and guaranteed on-resistance flatness of 9 ohm maximum over the signal range. The DG444DY+ contains four independent single-pole, single-throw switches. Each channel can conduct signal flow in either direction, allowing the same device to implement signal selection, source multiplexing, sample-and-hold routing, test-point isolation, and programmable gain-stage feedback control. Its monolithic CMOS construction supports compact, low-power designs, while the 16-pin SOIC package allows conventional surface-mount assembly and straightforward PCB footprint matching with compatible quad-SPST switch families. Typical uses include multimeter and oscilloscope input routing, automated test equipment, audio path selection, data acquisition systems, and instrumentation where several analog nodes must connect to a shared measurement path. The DG444DY+ is also appropriate where TTL-compatible or CMOS-compatible control levels are available and where switching speed and low off leakage are more important than very low on-resistance. When laying out a DG444DY+ circuit, place the device close to the switched signal nodes to minimize parasitic capacitance and coupling. Keep control traces away from sensitive analog conductors, use a defined return path for digital control signals, and confirm the actual signal amplitude against the device's absolute maximum ratings. Verify the exact power-supply and signal-range limits in the manufacturer data sheet before applying the part to a new design. This page combines verified manufacturer and distributor information, package-level drop-in alternatives, a parameter comparison, and practical PCB guidance. It is intended to help engineers evaluate the DG444DY+ faster than by reading the datasheet alone, while clearly separating documented values from specifications that still require confirmation.

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DG445CJ+ - 85Ω Quad SPST Analog Switch | Analog Devices
DG445CJ+

DG445CJ+ - 85Ω Quad SPST Analog Switch | Analog Devices

Analog Devices DG445CJ+ is an improved quad, single-pole single-throw analog switch with four independent 1:1 signal paths, 85Ω nominal on-resistance, and a 16-pin PDIP package. The device provides matched switch behavior through a maximum on-resistance matching specification of 4Ω and guaranteed on-resistance flatness of 9Ω maximum across the signal range, making it useful in precision analog routing systems. An analog switch is an integrated interface circuit that routes electrical signals between input and output terminals under digital control. The DG445 belongs to the analog-switch hierarchy, which also includes multiplexers, selectors, and signal-routing ICs. Unlike a mechanical relay, an analog switch changes connection state electronically with no mechanical movement. The DG445CJ+ combines four SPST switches in one package for applications requiring several independently controlled analog paths. Key features include four 1:1 switching circuits, an 85Ω nominal on-resistance, low on-resistance variation between switches, and controlled flatness over the operating signal range. The 16-pin PDIP format supports conventional through-hole PCB assembly and is appropriate for prototypes, legacy equipment, and industrial control boards where a surface-mount package would complicate rework. The Analog Devices product page identifies the DG445 family as production-grade and describes its redesigned switch matching characteristics. The matched on-resistance specification reduces channel-to-channel gain variation when identical signals are routed through different switches. A maximum matching of 4Ω and flatness of 9Ω are particularly relevant when the same measurement or control path must behave consistently across multiple inputs. These characteristics can simplify calibration and improve repeatability in data-acquisition, test-equipment, and control systems. Typical applications include sensor-signal routing, sample-and-hold front ends, instrumentation multiplexing, industrial control interfaces, and precision measurement systems. Four independent SPST switches allow one controller to select test paths, isolate stages, or route external analog signals without changing the printed-circuit-board layout. The device is especially useful where four similar channels must have closely matched resistance behavior. PCB design should preserve the pin assignments and pin numbering defined by the manufacturer datasheet. Because the package is a PDIP-16, adequate lead spacing and through-hole clearance are required, while analog input and output routing should minimize coupling from adjacent switching or digital-control nets. The control inputs should be driven with compatible logic levels, and unused or inactive channels should be configured according to the device data sheet. This product page combines the DG445CJ+ configuration, package information, matched-resistance characteristics, application guidance, and cross-reference analysis with practical design context. It supports faster part selection by showing where the quad SPST architecture fits and where a verified drop-in substitute may be appropriate.

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DG445DJ+ - Quad SPST 85 Ohm Analog Switch | Analog Devices
DG445DJ+

DG445DJ+ - Quad SPST 85 Ohm Analog Switch | Analog Devices

The Analog Devices DG445DJ+ is a production, quad, single-pole single-throw CMOS analog switch with four independent normally open switches, an 85 ohm on-resistance rating, TTL- and CMOS-compatible control inputs, and a 16-pin PDIP package. The device is designed for low-voltage signal routing where four separately controlled analog paths must be switched without introducing substantial resistance or signal degradation. An analog switch is a semiconductor device that uses digital control signals to connect or disconnect an analog signal path. The DG445DJ+ belongs to the interface-IC hierarchy as a monolithic CMOS analog switch. Its four independent SPST channels provide normally open behavior, allowing a control signal to establish a signal connection while the open state provides high isolation between routed nodes. The verified manufacturer information identifies the DG445 family as an improved replacement for the DG211 and DG212 series. It provides four independent switches, TTL- and CMOS-compatible digital inputs, on-resistance matching of 4 ohms maximum between switches, and guaranteed on-resistance flatness of 9 ohms maximum across the signal range. The distributor listing specifies an 85 ohm nominal on-resistance, while a legacy data listing reports 50 ohms; the 85 ohm figure is used for the DG445DJ+ procurement description. The improved matching and flatness specifications are significant when several DG445DJ+ channels carry signals that must present similar resistance to downstream circuitry. Flatness limits resistance variation as the analog voltage changes, helping preserve gain and timing consistency across the signal range. The monolithic CMOS implementation supports compact analog-routing designs without requiring four discrete mechanical or relay elements. Typical uses include battery-powered measurement systems, automated test equipment, multiplexed sensor interfaces, audio routing, sample-and-hold circuits, and communication equipment. Each of the four switches has its own control input, allowing independent routing decisions rather than requiring a shared address decoder. The 16-pin PDIP package is suitable for prototyping, legacy industrial equipment, and through-hole assemblies. The principal design consideration is that this older PDIP device is identified as RoHS non-compliant and contains lead. It should therefore be selected for compatible legacy or through-hole applications where regulatory and thermal requirements permit, rather than assumed suitable for new lead-free production without formal review. This product record combines verified manufacturer and distributor specifications, lifecycle information, pricing, package details, and practical selection guidance. It also distinguishes confirmed drop-in information from unsupported substitute claims, helping engineers avoid cross-package parts that would require PCB changes.

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DG445DY+ - Quad SPST Analog Switch | Maxim Integrated
DG445DY+

DG445DY+ - Quad SPST Analog Switch | Maxim Integrated

Maxim Integrated DG445DY+ is an improved quad SPST analog switch with four independent normally open channels, an 85 Ω on-resistance, and a 16-pin NSOIC package. It supports a 10 V to 30 V supply range, equivalent to ±4.5 V to ±20 V dual-supply operation, and provides TTL-compatible control inputs with specified 0.8 V and 2.4 V logic thresholds. An analog switch is a semiconductor device that routes analog or digital signals between circuit nodes under control of digital logic. The SPST designation means each of the four channels has one signal terminal and one switched terminal, while the normally open configuration leaves each channel disconnected until its control input is asserted. Within the broader hierarchy, DG445DY+ is an analog switch, interface IC, and discrete signal-routing component used between sensors, converters, test circuits, and signal-processing stages. Key improvements include on-resistance matching of 4 Ω maximum between switches and on-resistance flatness of 9 Ω maximum over the signal range. These characteristics help minimize channel-to-channel variation when the four switches must process comparable signals. The 85 Ω on-resistance reported by DigiKey and the 160 Ω figure shown by FindIC are retained as sourced observations, while the improved flatness specification is especially relevant to precision acquisition and test-equipment signal paths. The DG445 family was designed on a high-voltage silicon-gate CMOS process. Silicon-gate construction supports low leakage and reliable operation across wide supply voltages, while CMOS control inputs allow the device to interface with both TTL and CMOS logic systems. The manufacturer documentation identifies low signal error and distortion, reduced power-supply requirements, faster throughput, improved reliability, reduced pedestal errors, and simple interfacing as device benefits. Typical uses include audio switching, battery-powered systems, data acquisition, sample-and-hold circuits, telecommunications, automatic test equipment, and single-supply circuits. A four-channel SPST arrangement is particularly useful when several independent analog paths must be connected or isolated under digital control, such as selecting external sensors or routing instrumentation signals. Designers should verify the applicable supply configuration, control levels, and signal-voltage limits before layout. Keeping sensitive analog traces short and connecting the device ground pins to a low-impedance ground plane helps control return currents. Because on-resistance and matching are circuit-level errors, the switch should not be treated as an ideal zero-resistance path during signal-chain calculations. This page consolidates manufacturer information, distributor pricing, source-backed electrical characteristics, drop-in candidate evaluation, and practical selection guidance. It also distinguishes verified values from specifications that require confirmation, helping engineers compare DG445DY+ with its closest package-compatible alternatives without assuming unreported electrical data.

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DG468DV-T1-E3 - 9Ω SPST-NO Analog Switch | Vishay | TSOP-6
DG468DV-T1-E3

DG468DV-T1-E3 - 9Ω SPST-NO Analog Switch | Vishay | TSOP-6

The Vishay Siliconix DG468DV-T1-E3 is a low-power, high-voltage SPST (single-pole single-throw) normally-open analog switch with 9 ohm typical on-resistance, housed in a 6-lead TSOP (SOT-23-6 footprint) surface-mount package. An analog switch is a solid-state semiconductor device that routes or blocks analog signal paths under digital logic control. In the signal-chain hierarchy, analog switches sit between passive relays and multiplexer ICs: they belong to the broader family of analog multiplexers/switches, which themselves are interface and signal-routing components within mixed-signal power and signal management. Unlike electromechanical relays, CMOS analog switches offer microsecond switching, no coil drive, and effectively unlimited mechanical life. Key features of the DG468 include its wide supply range: operation from a single +7 V to +36 V supply or dual ±4.5 V to ±20 V supplies, enabling signal switching on high-voltage rails common in industrial systems. On-resistance is a low 9 ohms, and the device is a normally-open (NO) configuration, meaning the switch is open when the logic control input is low. Power consumption is very low, supporting battery-powered and low-standby-power designs. The DG468 is fabricated in a CMOS process and belongs to Vishay's DG467/DG468 family: the DG467 is the normally-closed complement, while the DG468 is normally open; both share the same die technology, package, and control interface, simplifying board reuse. The small TSOP6 package with a standard SOT-23-6 footprint (approximately 1.8 mm x 1.4 mm body, 2.9 mm x 1.6 mm outline per SOT-23 family conventions) fits dense layouts. Typical applications include audio and video signal routing, industrial PLC I/O modules, battery-management and test-equipment signal selection, communication-line switching on 24 V rails, and hot high-voltage analog front ends that exceed the range of standard 5 V switches. When designing with this switch, respect the absolute maximum signal range relative to the supply pins: the analog signal must never exceed V+ or go below V-, or internal ESD structures will conduct and can damage the die. This page synthesizes distributor pricing and availability, drop-in alternatives within the DG467/DG468 family, and practical design notes not found in the manufacturer datasheet.

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