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MAX3243EUU - 3V to 5.5V RS-232 Transceiver | Analog Devices
MAX3243EUU

MAX3243EUU - 3V to 5.5V RS-232 Transceiver | Analog Devices

The Analog Devices MAX3243EUU is a multichannel RS-232 line driver and receiver operating from a 3V to 5.5V supply, with data rates up to 250 kbps and integrated protection for RS-232 transceiver applications. The MAX3243 family is designed for portable equipment, data acquisition systems, industrial controls, and battery-powered instruments where low supply voltage, automatic shutdown, and compact serial-interface integration are important. An RS-232 transceiver is a bidirectional interface IC that converts logic-level UART signals into RS-232 line levels and converts received line-level signals back into CMOS-compatible digital signals. The MAX3243 combines multiple drivers and receivers with charge-pump circuitry for ±RS-232 voltage generation, reducing the external component count compared with discrete implementations. In the MAX3243EUU, this integration supports a low-voltage system architecture without requiring a separate 5V-only transceiver. Key electrical features include a 3V to 5.5V operating supply range, multichannel driver and receiver support, and operation up to 250 kbps. The Analog Devices product page identifies the MAX3243 as a production device with AutoShutdown capability, while the TI product listing describes the family as a 3V to 5.5V multichannel 250 kbps RS-232 line driver and receiver with plus-or-minus 15 kV ESD protection. The MAX3243EUU is supplied in a 28-pin small-outline package identified by distributor listings as TSSOP-28. It is appropriate for UART bridges, USB-to-serial adapters, embedded control boards, test equipment, and industrial serial controllers. Its low-voltage operation allows direct use with 3.3V microcontrollers, provided the logic levels and supply arrangement are verified against the device data sheet. Designers should confirm the exact package pinout, exposed-pad requirements, charge-pump capacitor values, and RS-232 line-driver loading limits before layout release. Decoupling capacitors should be placed close to the supply and ground pins, while the auto-shutdown and enable functions should be checked for compatibility with the host system's power-management sequence. This page combines the verified manufacturer and distributor references, pricing information available as of 2026-10-30, package information, and practical design guidance for engineers evaluating the MAX3243EUU in low-voltage serial-interface designs.

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MAX3243IDW - 250kbps 3/5 RS-232 Transceiver | Texas Instruments
MAX3243IDW

MAX3243IDW - 250kbps 3/5 RS-232 Transceiver | Texas Instruments

Texas Instruments MAX3243IDW is a 3- to 5.5-V multichannel RS-232 line driver and receiver capable of operation up to 250 kbps, with ±15 kV Human Body Model ESD protection on bus pins. The device integrates three drivers and five receivers in a 28-pin DW SOIC package, making it suitable for multichannel serial-interface equipment. An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and the bipolar voltage levels used by RS-232 equipment. It combines drivers, receivers, and often charge-pump voltage-generation circuitry into one package. This integrated approach reduces external component count and helps designers implement PC serial ports, industrial controls, data-collection equipment, and other systems that require reliable serial communication over longer cable runs. The MAX3243IDW operates from a 3 V to 5.5 V supply, allowing use in both 3.3 V and 5 V systems. Its 250 kbps signaling rate supports legacy serial-port data rates and other multichannel RS-232 links. Individual channel enable and shutdown functions provide control over transmitter and receiver activity, while AutoShutdown operation reduces supply current when no valid signal is present. The integrated charge pump supports standard RS-232 voltage generation without an external DC-DC converter. Electrical protection is a significant feature for connector-facing circuits. The MAX3243 provides ±15 kV ESD protection using the Human Body Model on RS-232 bus pins. Protection does not replace proper connector design, external surge protection, or controlled cable routing, but it adds a useful barrier against electrostatic discharge encountered during handling and field installation. Typical applications include DE-9 serial-port interfaces, industrial data acquisition, point-of-sale equipment, test and measurement systems, and embedded control systems that exchange commands or diagnostic data with RS-232 peripherals. The three-driver and five-receiver arrangement is especially useful when one controller must communicate with multiple external devices while maintaining independent transmit control. Design should account for charge-pump capacitor selection, local bypassing, unused-channel configuration, and the voltage-versus-current behavior of RS-232 drivers. Keep ground and signal routing consistent with the referenced design, place bypass and charge-pump components close to the device, and validate cable length and data rate together because both influence signal integrity and receiver margin. This product page combines the manufacturer's electrical and package information with practical interface guidance, application scenarios, parameter-level comparisons, and replacement criteria. It is intended to help engineers determine whether the MAX3243IDW meets voltage, channel-count, data-rate, ESD, package, and lifecycle requirements before committing it to an RS-232 design.

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MAX3243IPW - 250kbps RS-232 Transceiver | Texas Instruments
MAX3243IPW

MAX3243IPW - 250kbps RS-232 Transceiver | Texas Instruments

The Texas Instruments MAX3243IPW is a 3- to 5.5-V multichannel RS-232 line driver and receiver rated for data rates up to 250 kbps, with three drivers and five receivers in a 28-pin TSSOP package. The device is designed for serial-port and other point-to-point RS-232 interfaces where several channels must share one low-voltage supply. An RS-232 transceiver is an interface IC that combines the electrical functions required to communicate between TTL or CMOS logic and RS-232 logic levels. Within the interface hierarchy, the MAX3243IPW is a multichannel RS-232 transceiver, also described as a line driver and receiver. Its driver channels convert logic-level inputs into RS-232-compatible signals, while its receiver channels convert incoming RS-232 signals into logic-level outputs. The MAX3243IPW operates from 3 V to 5.5 V, supports signaling up to 250 kbps, and includes ±15-kV ESD protection using the HBM test method on the serial-port connection pins. Three drivers and five receivers provide an asymmetric channel count suited to applications such as DE-9 serial connections. The manufacturer also describes AutoShutdown functionality and always-enabled ROUT2B and INVALID outputs for monitoring ring and valid-input status. The wider supply range allows the interface to operate from 3.3-V or 5-V system rails without a separate RS-232 transceiver supply. Multiple integrated drivers and receivers reduce the number of external interface ICs required in multi-channel equipment. Always-enabled status outputs can simplify supervision of modem or communications equipment, although their fixed operation should be checked against the system power-management architecture. Typical uses include legacy RS-232 serial ports, industrial control interfaces, data-acquisition equipment, point-of-sale terminals, and embedded systems requiring legacy peripheral connectivity. The MAX3243IPW can also complement a modern microcontroller or transceiver module when an existing enclosure or cable standard still exposes RS-232 signals. Careful signal-level, grounding, and ESD layout practices remain necessary in electrically noisy environments. For PCB design, place the device near the connector or protected interface entry point and route protected RS-232 traces away from sensitive analog and clock circuitry. Confirm that the exposed connector pins have appropriate surge and ESD protection because the integrated ±15-kV HBM rating does not eliminate the need for an engineered external protection strategy. Follow the manufacturer pin-description and layout guidance for decoupling, grounding, and protection-network placement. This product reference combines the MAX3243IPW electrical identity, verified package information, channel configuration, interface capabilities, and application-oriented engineering guidance. It also provides a framework for checking pin-compatible alternatives, understanding the limits of interface protection, and selecting between integrated transceivers, system transceivers, and newer communication architectures.

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MAX3243MPWREP - 3/5 RS-232 Transceiver | Texas Instruments
MAX3243MPWREP

MAX3243MPWREP - 3/5 RS-232 Transceiver | Texas Instruments

The Texas Instruments MAX3243MPWREP is a 3V-to-5.5V multichannel RS-232 line driver and receiver in a 28-pin TSSOP package. It integrates three line drivers, five line receivers, and a dual charge-pump circuit, providing the electrical interface between an asynchronous communication controller and a serial connector. The device supports data rates up to 250 kbps and includes ±15 kV human-body-model ESD protection on the serial-port connection pins. An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line levels and converts received RS-232 signals back into digital logic levels. The MAX3243 belongs to the RS-232 transceiver family, within the broader interface IC and semiconductor hierarchy. Its integrated charge pumps generate the positive and negative voltages required by RS-232, reducing the need for external discrete supply circuitry. The principal features of the MAX3243MPWREP are its three-driver, five-receiver configuration, 3V-to-5.5V supply operation, and 250 kbps data-rate capability. The 3V minimum supply voltage supports integration with modern low-voltage digital controllers, while the 5.5V maximum accommodates conventional 5V systems. Pin-to-pin ±15 kV HBM ESD protection adds robustness at exposed serial connectors. The device includes a dual charge-pump circuit to support RS-232 signal levels from a single supply. Five receivers allow multiple incoming channels to be monitored, while three drivers support outbound RS-232 connections. The asymmetric channel count makes the device suitable for designs that require more receive capability than transmit capability, such as control, monitoring, or diagnostic equipment. Typical applications include industrial serial controllers, point-of-sale terminals, instrumentation, data-collection systems, and RS-232 port expansion. The 250 kbps maximum data rate is appropriate for asynchronous control links and moderate-rate data transfers. System designers must still account for cable length, connector exposure, signal integrity, and the electrical limitations of the RS-232 standard. Decoupling capacitors should be placed close to the charge-pump and supply pins, while external protection may be needed when cables extend beyond the enclosure or connect to electrically noisy equipment. Verify the pin configuration and capacitor values in the manufacturer datasheet before layout because the dual charge-pump topology depends on correct external capacitor placement. This page combines the MAX3243MPWREP electrical characteristics, drop-in replacement options, application guidance, and practical layout considerations to support faster component selection and board-level implementation. It also provides a concise comparison of channel count, voltage range, data rate, protection, package, and temperature coverage for engineering review.

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MAX3245ECAI+ - 1Mbps 3/5 RS-232 Transceiver | Analog Devices
MAX3245ECAI+

MAX3245ECAI+ - 1Mbps 3/5 RS-232 Transceiver | Analog Devices

The Analog Devices MAX3245ECAI+ is a 3.0V-to-5.5V, ±15kV ESD-protected RS-232 transceiver with three drivers, five receivers, 1Mbps data rate, 1uA shutdown current, and a 28-pin SSOP package. An RS-232 transceiver is an interface IC that converts between complementary logic-level signals and the voltage-defined bipolar signaling used by RS-232 equipment. It belongs to the transceiver class within interface ICs, bridging UART, microcomputer, industrial-control, and communications systems. The MAX3245 family supports EIA/TIA-232 and V.28/V.24 communication interfaces while reducing the number of external components needed for a practical RS-232 port. Three driver channels and five receiver channels support multi-drop or multi-peripheral point-to-point arrangements. Its 1Mbps maximum data rate is suitable for moderate-speed serial links, and the ±15kV ESD rating adds protection for exposed connector-facing circuitry. The 3.0V-to-5.5V supply range accommodates both 3.3V and 5V system rails. AutoShutdown Plus provides low-power behavior for systems where power consumption matters during idle periods. The MAX3245ECAI+ uses the MAX3245E device family and is identified with the E suffix, 28-pin SSOP package, and industrial-temperature ordering code in the supplied distributor data. The verified distributor listings describe the device as a full RS-232 transceiver with three drivers and five receivers. The exact internal channel pinout, electrical limits, charge-pump capacitor requirements, and package dimensions require confirmation from the manufacturer datasheet before layout or replacement approval. Typical uses include USB-to-RS-232 adapters, industrial serial consoles, instrumentation, data acquisition, embedded control boards, and service ports. In each case, the transceiver provides the physical-layer conversion while the attached UART or processor handles framing and protocol software. The 1uA shutdown specification can reduce standby current when the port is not actively used, provided the AutoShutdown Plus control and external network are configured correctly. For PCB design, place the device close to the RS-232 connector, route driver and receiver traces away from sensitive analog or high-speed digital signals, and verify the required external charge-pump capacitors against the datasheet. This page combines verified distributor specifications, source traceability, replacement analysis, and application guidance; it does not invent unprovided pin assignments or pricing values.

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MAX32550-LCS+T - Secure Cortex-M3 MCU 1MB Flash 121-CTBGA | ADI
MAX32550-LCS+T

MAX32550-LCS+T - Secure Cortex-M3 MCU 1MB Flash 121-CTBGA | ADI

The Analog Devices (formerly Maxim Integrated) MAX32550-LCS+T is an ARM Cortex-M3 based DeepCover secure microcontroller running at 108 MHz, integrating 1 MB of embedded Flash, 256 KB of system RAM, and 8 KB of battery-backed AES self-encrypted NVSRAM, packaged in a 121-ball CTBGA (8x8 mm). The DeepCover security subsystem is purpose-built for trusted devices such as mobile chip-and-PIN payment terminals and PIN pads. A secure microcontroller is an MCU that combines a standard processor core (here, ARM Cortex-M3) with integrated hardware cryptographic engines, secure boot ROM, tamper detection, and physically separate key storage. The MAX32550 belongs to the broader hierarchy: secure MCU -> microcontroller -> embedded processor -> integrated circuit. This device targets financial-terminal OEMs who need both application-class processing power and FIPS-grade security in a single chip. Key features include a 32-bit ARM Cortex-M3 core with 108 MHz maximum clock, 1 MB embedded Flash (1M x 8), 256 KB SRAM, 8 KB AES self-encrypted NVSRAM with battery backup, integrated cryptographic accelerators (AES, DES, SHA, RSA, ECC), hardware True Random Number Generator, secure boot ROM, physical tamper detection pins, an integrated smart-card interface (ISO 7816), magnetic-stripe reader interface, and USB 2.0 Full-Speed with on-chip PHY. The MAX32550 integrates a BGA package with 121 balls on an 8x8 mm body, allowing a compact PCB solution that includes the secure element, application MCU, and physical-tamper mesh interfaces in a single device. The NVSRAM is automatically encrypted with AES-256 keys generated and stored in a dedicated hardware block, removing software-side key management for tamper-sensitive state. The chip targets POS terminal OEMs seeking PCI PTS 4.x/5.x and EMVCo certification. Typical applications include mobile chip-and-PIN payment terminals, PIN pads, POS terminals, secure authentication tokens, EMV smart-card readers, and other financial-grade trusted devices. Industrial secure-control applications such as access-control and hardware security modules also benefit from the integrated tamper mesh. Design consideration: route the battery-backup NVSRAM domain with a separate power rail and a battery cell or super-cap; the cryptographic NVSRAM state is preserved while the rest of the chip powers down. Provide adequate ground-return vias under the CTBGA to meet EMI/magnetic-stripe-decoder noise immunity requirements. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.

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MAX32666GXMBT+ - Dual-Core Cortex-M4/M4F BLE 5 MCU | ADI
MAX32666GXMBT+

MAX32666GXMBT+ - Dual-Core Cortex-M4/M4F BLE 5 MCU | ADI

The Analog Devices / Maxim Integrated MAX32666GXMBT+ is a 32-bit dual-core ARM Cortex-M4/M4F microcontroller with FPU, integrated Bluetooth 5 LE radio, hardware security suite, and 1MB Flash, housed in a 121-ball CTBGA (8x8 mm) package. The part operates from 1.71V to 3.6V supply at up to 96MHz core clock and includes 192KB SRAM plus 1MB on-chip Flash. Its dual-core architecture pairs an applications processor with an always-on network co-processor, enabling low-power wearable and IoT designs without sacrificing radio throughput. A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program and data memory, peripherals, and I/O onto one silicon die. The Cortex-M4 family adds a single-precision hardware floating-point unit (FPU) for DSP-class math, and a dual-core MCU further partitions responsibilities - one core runs application logic while the other offloads wireless stack, sensor fusion, or security tasks - reducing wake events and total system energy per task. Key features of the MAX32666GXMBT+ include Bluetooth 5 LE with 2 Mbps high-throughput and 4x long-range PHY modes, ADI TrustZone-style hardware secure element (TRUST), secure boot, true random number generator, AES-256, and SHA-256 accelerators. The integrated DC-DC converter and multiple low-power modes (Active, Sleep, Deep Sleep, Backup, Standby) yield system-level current as low as a few microamps in deep-sleep retention, critical for coin-cell and rechargeable wearables. Architecturally, the part is fabricated in a low-leakage CMOS process and uses ADI's ultra-low-power design IP. The radio block shares the same die as the application cores, eliminating external balun-matching complexity when paired with the recommended chip antenna. Hardware crypto accelerators offload TLS / DTLS handshake workloads so the M4F core can remain idle, further improving energy per transaction. Typical applications include fitness bands and smartwatches, medical wearable patches (continuous glucose monitor, SpO2), secure IoT endpoints (BLE sensor nodes), industrial asset trackers, and hearables / wireless earbuds. The wide 1.71-3.6V supply range supports direct Li-ion battery connection with internal regulation, simplifying the power tree. When designing with this part, allocate the secondary core exclusively to the BLE stack and security; do not share it with general application code. Validate PCB stack-up against the CTBGA escape pattern in the package diagram, and place the DC-DC inductor within 2mm of the LX pin to keep ripple below the AES engine's noise floor.

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MAX33040EAKA+ - +3.3V 5Mbps CAN Transceiver, ±40V Fault, SOT-23-8 | Maxim Integrated
MAX33040EAKA+

MAX33040EAKA+ - +3.3V 5Mbps CAN Transceiver, ±40V Fault, SOT-23-8 | Maxim Integrated

The Maxim Integrated MAX33040EAKA+ is a +3.3V control area network (CAN) bus transceiver with integrated overvoltage and ESD protection, housed in an 8-pin SOT-23 package. It supports data rates up to 5 Mbps, offers ±40V fault protection on the CANH and CANL bus pins, ±40 kV ESD HBM protection, and ±25V common-mode range, exceeding the ISO 11898-2 CAN physical-layer standard. A CAN transceiver (also called a CAN physical-layer device) sits between a microcontroller's CAN protocol controller and the differential CAN bus wires. It converts the microcontroller's digital TX/RX logic levels into the differential dominant/recessive voltages defined by ISO 11898-2, and simultaneously protects the sensitive MCU side from harsh automotive and industrial bus transients. Within the broader hierarchy, a CAN transceiver falls under Interface ICs > Wired Communication > CAN/LIN transceivers. Key features include a 3V to 3.6V single-supply operating range, low-current standby and silent modes, hot-plug capability, slope control for limited-data-rate applications, and TXD dominant-timeout to prevent bus lockup from a stuck dominant node. The SOT-23-8 footprint occupies roughly 9 mm² of board area, making it one of the smallest isolated-fault CAN transceivers available. Internally the device combines a differential CAN driver/receiver pair with TVS-based fault clamps and an ESD cell rated to ±40 kV HBM. The wide ±25V CMR allows it to reject large ground-shift noise typical of long industrial cables and 12V/24V battery-powered equipment, while the ±40V fault tolerance survives load-dump and jump-start events far beyond the ISO 7637 pulse ratings. Typical applications include building automation gateways, industrial drones and motor controllers, factory-floor sensors, instrumentation data links, service and educational robots, and any 3.3V MCU-based system that must communicate reliably over CAN. Its small SOT-23-8 package and integrated ±40V/±40kV protection eliminate the need for external TVS diodes, common-mode chokes, and isolation in many designs. When designing with the MAX33040EAKA+, observe the bus-termination requirement of two 120 Ω resistors (one at each end of the bus) and place a 100 nF decoupling capacitor as close as possible to the VCC pin. The SLP pin can be tied high for low-speed, slope-controlled operation or left open for normal high-speed mode.

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MAX334EWE+ - Quad SPST High-Speed Analog Switch, 50 Ohm, 16-SOIC | Maxim Integrated
MAX334EWE+

MAX334EWE+ - Quad SPST High-Speed Analog Switch, 50 Ohm, 16-SOIC | Maxim Integrated

The Analog Devices MAX334EWE+ is a high-speed quad SPST analog switch IC: four independent single-pole single-throw switches with 50 ohm on-resistance packaged in a 16-pin SOIC (SOP-16), powered from +5 V to +30 V single supply or plus/minus 5 V to plus/minus 15 V split supplies with CMOS- and TTL-compatible logic inputs. An analog switch is a solid-state semiconductor device that connects or disconnects an analog signal path under digital control. The switch belongs to the multiplexer family: a single SPST switch is the simplest routing element, and four of them in one package form a quad analog switch that can connect four signal sources to four loads, sample-and-hold front ends, or guard a bus. Like all CMOS analog switches, it sits between the signal world and the digital control world, bridging analog signal conditioning and logic-level control. Key features of the MAX334EWE+ include a 50 ohm on-resistance, high switching speed, break-before-make behavior for all four channels, and logic-compatible control inputs that accept both CMOS and TTL levels. The manufacturer positions it as a direct replacement for the DG201 and DG211, offering one quarter the on-resistance and five times the speed of those earlier parts. The wide supply range accepts laboratory bench rails, industrial 24 V nominal buses, and split supplies without level shifting. Technically, the device uses CMOS switch cells with independent control inputs per channel, so each switch can be steered by a separate logic signal. Low on-resistance keeps insertion loss and load-induced error small in high-impedance measurement paths, while break-before-make sequencing prevents the momentary shorting of two driven nodes that would corrupt a measurement. The MAX334EWE+ is specified for industrial temperature grade and ships in a surface-mount SOP-16 package. Typical uses include precision sample-and-hold circuits in data acquisition systems, signal routing in test and measurement instrumentation, battery-cell and supply monitoring front ends, audio and communications signal path switching, and industrial or automotive signal multiplexing where several analog lines must be selected by a controller. When designing around this device, treat each control input as a digital signal that still requires clean rise and fall times, and keep analog traces short and shielded from the switching control pins. Confirm break-before-make timing against your acquisition system and account for input capacitance and charge injection when the switched node feeds a high-gain amplifier. This page consolidates the switch function, supply and logic compatibility, drop-in replacement options, and practical routing and layout guidance in one place, so an engineer can qualify the MAX334EWE+ for a new board or an existing design revision without cross-checking several documents.

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MAX335EWG+ - 8-Channel SPST Serial Switch | Analog Devices
MAX335EWG+

MAX335EWG+ - 8-Channel SPST Serial Switch | Analog Devices

The Analog Devices MAX335EWG+ is an 8-channel single-pole single-throw analog switch with a serial digital interface, 150 ohm on-resistance, and operation from -15 V to +20 V supply voltage in a 24-pin WSOIC package. The device provides eight separately controlled switches that conduct equally in either direction, making it suitable for routing analog signals in test, measurement, industrial, and data-acquisition systems. An analog switch is a semiconductor interface that connects or disconnects signal paths under digital control. The MAX335 belongs to the broader CMOS analog-switch and interface-IC hierarchy, where the switch handles analog signal routing while a serial interface controls channel state. Each SPST channel provides one normally open path, allowing external circuitry to select among multiple signals without redesigning the analog path. The MAX335EWG+ features a nominal 150 ohm on-resistance, approximately 400 ns switching times, 90 dB isolation, and an industrial operating-temperature range from -40 C to +85 C. Its serial control reduces the number of external control pins required when multiple channels must be managed in a compact system. The analog signal path is designed to maintain consistent resistance across the specified signal range. Use the device when a system needs eight independently addressable SPST routes and can accept a serial command interface. A typical implementation places the switch between a sensor or measurement source and a downstream analog front end, allowing the controller to select test channels or isolate signal paths. The -15 V to +20 V supply range supports both positive and negative analog signal environments. PCB layout should keep analog traces short, provide a stable ground reference, and place decoupling capacitors close to the supply pins. The serial interface requires correct logic levels and signal timing; the manufacturer datasheet should be used for pin assignment and serial protocol details. Confirm the maximum signal voltage, current, and switching conditions before finalizing the design. This product page consolidates the MAX335EWG+ electrical specifications, package information, sourcing guidance, and practical design considerations into one reference for engineers evaluating serial-controlled analog routing.

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MAX337CWI+ - Dual 8:1 CMOS Multiplexer | Analog Devices
MAX337CWI+

MAX337CWI+ - Dual 8:1 CMOS Multiplexer | Analog Devices

Analog Devices MAX337CWI+ is a dual 8:1 CMOS analog multiplexer with 400 ohm on-resistance in a 28-pin SOIC package. The device routes one of eight analog inputs on each multiplexer section to a common output, providing 16 switch channels in one IC. Its low-leakage design makes it suitable for precision signal selection, measurement systems, and instrumentation where minimizing input loading is important. An analog multiplexer is a semiconductor switch that connects one selected input to a shared output. A dual 8:1 CMOS multiplexer expands two independent groups of eight inputs into two common outputs. This hierarchy places the MAX337CWI+ within analog switches, interface ICs, and general-purpose signal-routing devices. It reduces the number of external routing components while allowing one controller to select among multiple analog signals. The MAX337 family is identified as a 16-channel dual 8-channel, low-leakage CMOS analog multiplexer. According to the manufacturer product page, MAX337 is in production, and the manufacturer datasheet describes the device as a monolithic CMOS analog multiplexer. Its 8:1 configuration uses address-control inputs to select one input per section and route it to the corresponding common output. The listed 400 ohm on-resistance provides the principal quantified electrical characteristic for this exact listing. It determines the series loss and interaction between the selected source and destination when the switch is on. Low leakage is especially important when the mux precedes high-impedance analog nodes, because leakage current can create an error voltage proportional to the input source impedance. Typical uses include battery-cell monitoring, sensor multiplexing, data acquisition, automated test equipment, and laboratory instruments. The dual architecture is particularly useful when two related analog quantities must be selected independently, such as paired sensor outputs or two channels within a multichannel measurement system. The same common-output arrangement can also be used to share a downstream amplifier or converter between several inputs. Designers should treat the address controls as digital signals while paying attention to the analog signal range, source impedance, and leakage of the connected sources. Place bypass and signal-conditioning components close to the mux pins, keep analog routing away from high-current switching nodes, and use a suitable common-ground strategy. Review the manufacturer pin-description table and operating limits before finalizing the board layout. This page combines the manufacturer overview, distributor identification, package details, cross-reference results, and practical selection guidance for the MAX337CWI+. It also distinguishes a verified dual 8:1 replacement candidate from devices that use a different package or channel architecture, helping engineers narrow replacement decisions without confusing functional similarity with true drop-in compatibility.

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MAX3380EEUP+ - 2/2 RS-232 Transceiver | Analog Devices
MAX3380EEUP+

MAX3380EEUP+ - 2/2 RS-232 Transceiver | Analog Devices

Analog Devices MAX3380EEUP+ is a 2-transmitter, 2-receiver RS-232 transceiver designed for +2.35 V to +5.5 V operation, with 15 kV ESD protection on both the RS-232 and logic pins and support for data rates up to 460 kbps. The device is offered in a 20-pin TSSOP package. An RS-232 transceiver is an interface IC that converts between single-ended logic-level signals and differential bipolar RS-232 signals. It belongs to the transceiver class, then to the broader interface IC and semiconductor hierarchy. This bidirectional interface is useful when equipment must communicate over longer cable distances, tolerate ground-offset differences, or meet the electrical characteristics associated with EIA/TIA-232 and V.28 communications. The MAX3380EEUP+ uses a low-dropout transmitter output stage and a dual charge pump. These features allow RS-232-compatible output levels from supplies below +3.1 V and down to +2.35 V without increasing supply current when the supply lies within that range. Its +5.5 V maximum operating voltage also makes it suitable for systems powered from a single lithium-ion cell or a low-voltage regulated rail. The four-driver, four-receiver naming in some listings refers to two transmit channels and two receive channels rather than four independent full-duplex ports. Both RS-232 I/O pins and logic-side pins receive enhanced electrostatic-discharge protection. Typical system-level uses include data acquisition equipment, industrial controllers, service interfaces, embedded serial ports, and instrumentation that requires a compact, low-voltage RS-232 connection. For board design, treat the transmitter outputs and receiver inputs as externally exposed communication pins even when the logic-side pins are protected. Keep the interface connector and cable path away from sensitive analog circuitry, provide the required bypass capacitance close to the supply pins, and route the differential transmission traces as a pair. The transmitter should connect to the remote RS-232 port through protection and signal-conditioning components appropriate to the required surge and ESD levels. MAX3380EEUP+ is appropriate when a board needs two RS-232 receive channels and two RS-232 transmit channels from a compact, low-power interface IC. Verify cable length, data rate, connector protection, and grounding before deployment. This page combines the product specifications, qualified package details, sourcing information, replacement guidance, and practical RS-232 design considerations into a focused engineering reference.

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MAX3385EEAP - 250kbps RS-232 Transceiver | Analog Devices
MAX3385EEAP

MAX3385EEAP - 250kbps RS-232 Transceiver | Analog Devices

The Analog Devices MAX3385EEAP is a low-power RS-232 transceiver rated for data rates up to 250kbps and operation from a 3.0V to 5.5V supply. The device is offered in a 20-pin SSOP package and provides the driver and receiver functions required to connect a modern digital circuit to an RS-232 serial port. Its integrated protection is specified for ±15kV electrostatic-discharge exposure on the serial lines. An RS-232 transceiver is an interface IC that belongs to the line-driver and line-receiver hierarchy within interface semiconductors. It converts logic-level signals into RS-232-compatible levels in the transmit direction and converts incoming RS-232 levels back into logic levels in the receive direction. The MAX3385EEAP therefore provides the physical signaling layer between equipment logic and a cable-based serial interface. Key characteristics include support for both 3.0V and 5.5V supply operation, a maximum signaling rate of 250kbps, low-power design, true RS-232 transceiver operation, and ±15kV ESD protection. The 3.0V minimum supply makes the interface suitable for systems whose digital core operates below 5V, while the 5.5V upper limit allows use with conventional 5V equipment. The 250kbps rate supports modern point-to-point serial links without requiring the lower bandwidth associated with legacy communication standards. The MAX3385EEAP combines two transmit drivers and two receive receivers in one package, matching the conventional direction and signal arrangement used by RS-232 interface designs. Its integrated ESD protection reduces the amount of external protection normally required at a connector or cable entry. Applications still require correct signal routing, suitable bypass capacitance, controlled return paths, and compliance with the applicable RS-232 electrical requirements. Typical uses include industrial control consoles, test equipment, data acquisition systems, service interfaces, and embedded products that retain an RS-232 port for configuration or diagnostics. The part is particularly useful where modern 3.3V logic must communicate with an RS-232 host while board area and external protection components must be minimized. Designers should begin with the manufacturer's pin-description table when assigning PCB tracks and must preserve the documented charge-pump and driver topology around the transceiver. Input and supply bypassing should be placed close to the relevant pins, and connector-side protection must be reviewed against the required ESD exposure and working voltage. This page consolidates the core electrical and package characteristics of the MAX3385EEAP with application guidance, comparison parameters, and practical interface-design considerations. It is intended to help engineers determine whether the device's voltage range, data rate, package, and protection level match a particular RS-232 design before committing the footprint to a PCB.

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MAX3386ECUP+ - 3/2 RS-232 Transceiver, 250kbps | Analog Devices
MAX3386ECUP+

MAX3386ECUP+ - 3/2 RS-232 Transceiver, 250kbps | Analog Devices

The Analog Devices MAX3386ECUP+ is a 3/2 RS-232 communications transceiver with three transmitters, two receivers, operation from a 3.0V to 5.5V supply, and data rates up to 250kbps. The device is housed in a 20-pin TSSOP package and is designed for low-power, portable equipment requiring EIA/TIA-232, V.28, or V.24-compatible serial interfaces. An RS-232 transceiver is an interface IC that bridges a low-voltage digital logic system and a single-ended, bipolar RS-232 link. It belongs to the communications-interface hierarchy, combining transmitter and receiver functions with the voltage conversion and protection required for unbalanced serial communication. The MAX3386ECUP+ also uses charge-pump circuitry to generate the positive and negative voltages required by RS-232 output levels from a single low-voltage supply. The MAX3386ECUP+ supports a 3.0V to 5.5V supply and operates at data rates up to 250kbps while maintaining RS-232-compliant output levels. Its dual charge pump requires four 0.1uF capacitors for operation from a 3.3V supply. The three-driver, two-receiver arrangement suits equipment with several outbound serial channels and fewer inbound channels, while enhanced electrostatic-discharge protection improves robustness in exposed cable-connected systems. The low-dropout transmitter output stage enables true RS-232 performance without requiring a 5V-only power rail, making the device useful in battery-powered and portable systems. The manufacturer describes the MAX3386E family as a low-power communications interface with high data-rate capability and enhanced ESD protection. Charge-pump switching and transmitter edge behavior should be considered when the serial link operates next to sensitive analog circuitry. Typical uses include RS-232 ports in personal digital assistants and cellular phones, diagnostic and programming interfaces, industrial equipment, point-of-sale terminals, and embedded serial adapters. Its 250kbps maximum rate provides useful margin above common asynchronous serial communication rates, while the compact 20-pin TSSOP package supports space-constrained portable products. Design the charge-pump capacitor network for the shortest practical connection to the supply and ground pins. Confirm the connector-side protection strategy and cable routing because the integrated ESD protection does not eliminate the need for correct board layout and system-level grounding. Verify signal levels and timing against the manufacturer datasheet before replacing a multi-transceiver interface. This product page combines manufacturer specifications, pin-compatible alternatives, application guidance, and practical interface-design notes. It helps engineers compare protocol capability, package compatibility, protection, and implementation constraints before selecting a compact RS-232 transceiver.

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MAX3386EEUP+ - 3V ESD-Protected RS-232 Transceiver | Analog Devices
MAX3386EEUP+

MAX3386EEUP+ - 3V ESD-Protected RS-232 Transceiver | Analog Devices

Analog Devices MAX3386EEUP+ is a 3V-powered EIA/TIA-232 and V.28/V.24 transceiver with three transmitters, two receivers, ±25 kV ESD protection, and a 20-pin TSSOP package. It combines low-power operation with high data-rate capability for portable equipment, data acquisition systems, and industrial serial interfaces. An RS-232 transceiver is an interface IC that converts logic-level digital signals into RS-232-compatible voltage levels and converts incoming RS-232 signals back into digital logic. Within the interface hierarchy, the MAX3386EEUP+ is a multi-driver, multi-receiver line-interface device designed for point-to-point serial links requiring electrostatic-discharge protection. Key features include three RS-232 drivers, two RS-232 receivers, a nominal 3V supply, and enhanced ESD protection of ±25 kV. The device targets EIA/TIA-232 and V.28/V.24 communications while emphasizing low power requirements and high data-rate capability. Its 20-pin TSSOP package supports compact surface-mount PCB construction without requiring external driver circuitry for each unidirectional RS-232 link. The MAX3386EEUP+ family provides a practical bridge between a modern microcontroller UART and a legacy RS-232 port. The three transmitters support multiple outputs, while two receivers can monitor two incoming signals or implement a hardware handshake arrangement. The ±25 kV ESD rating increases robustness at exposed connector interfaces, although board-level routing and grounding remain essential for dependable operation. Typical applications include personal digital assistants, cellular phones, portable instrumentation, barcode readers, industrial controls, and service or diagnostic equipment. It is particularly useful where a compact PCB requires several RS-232 signals but the system power supply operates near 3V. The interface supports point-to-point links rather than multidrop RS-232 networks. When designing the circuit, account for RS-232's unbalanced voltage signaling and use a suitable protection network at any externally accessible connector. Keep the transceiver and its charge-pump components away from sensitive analog areas, and follow the Analog Devices pin-description table when assigning connector and logic signals. Confirm the exact data rate, supply range, and operating temperature limits against the manufacturer datasheet before release. This page combines the manufacturer's interface description, package information, drop-in candidates, application guidance, and design considerations to support faster component evaluation and sourcing decisions.

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MAX3387ECUG+ - 3V 250kbps RS-232 Transceiver | Analog Devices
MAX3387ECUG+

MAX3387ECUG+ - 3V 250kbps RS-232 Transceiver | Analog Devices

Analog Devices MAX3387ECUG+ is a 3V-powered EIA/TIA-232 and V.28/V.24 communications transceiver with three transmitters, three receivers, data rates up to 250 kbps, enhanced ESD protection, and a 24-pin TSSOP package. It operates from a 3V to 5.5V supply and uses a dual charge pump with four 0.1uF capacitors for operation at 3.3V. An RS-232 transceiver is an interface IC that converts between logic-level signals and the voltage-defined bipolar signals used by RS-232 equipment. It belongs to the transceiver and line-driver/receiver hierarchy within interface ICs, bridging portable processors, cellular equipment, industrial controllers, and legacy serial ports while adding level conversion and electrostatic-discharge protection. The MAX3387E family provides three driver channels and three receiver channels, allowing three RS-232 links to be implemented in a compact design. Its low-dropout transmitter output stage is intended to preserve compliant RS-232 output levels with a supply as high as 5.5V. The manufacturer describes the device for low-power requirements, high data-rate capability, and enhanced ESD protection, with stated ±15kV protection for the MAX3387ECUG+. Its dual charge-pump architecture generates the positive and negative transmitter voltages required by RS-232 while operating from a single low-voltage supply. Four small 0.1uF charge-pump capacitors are sufficient for 3.3V operation according to the manufacturer documentation. The AutoShutdown Plus feature is intended to reduce power consumption when the interface is not active, making the part suitable for battery-powered and portable systems. Typical applications include RS-232 links in PDAs, cellular phones, data acquisition equipment, industrial controllers, point-of-sale terminals, and portable diagnostic instruments. The three-transmitter and three-receiver organization is useful where a board must expose multiple serial channels while conserving space and avoiding separate level-conversion ICs. Design should place the charge-pump capacitors close to their designated pins and route each RS-232 driver output with controlled return-path geometry. External protection may still be required for long cables or severe industrial environments, and system designers should confirm logic levels, shutdown behavior, receiver enable timing, and line-driver loading against their system requirements. This page organizes the principal electrical characteristics, package information, verified sourcing references, compatible family options, and practical interface-design considerations into a consolidated guide for engineers evaluating the MAX3387ECUG+.

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MAX3387EEUG+ - 3V RS-232 Transceiver, 250kbps, ±15kV ESD | Maxim
MAX3387EEUG+

MAX3387EEUG+ - 3V RS-232 Transceiver, 250kbps, ±15kV ESD | Maxim

The Analog Devices (formerly Maxim Integrated) MAX3387EEUG+ is a 3V-powered, ±15kV ESD-protected RS-232 transceiver with three drivers and three receivers, housed in a 24-pin TSSOP package. It supports data rates up to 250 kbps, complies with EIA/TIA-232 and V.28/V.24 standards, and integrates a charge pump to generate the ±5.5V RS-232 levels from a single 3.0V to 5.5V supply. The 'E' suffix indicates the enhanced AutoShutdown Plus mode that reduces supply current to 1 µA typical when no valid cable is connected. An RS-232 transceiver is a line driver/receiver IC that translates between TTL/CMOS logic levels (0-3.3V) on the UART side and the bipolar ±5V to ±15V signal levels required by the legacy RS-232 standard on the cable side. RS-232 transceivers sit at the physical layer of serial communication and remain ubiquitous in point-of-sale terminals, industrial equipment, legacy PC peripherals, and embedded debug ports despite being superseded by USB and Ethernet in many consumer applications. Key features include ±15kV ESD protection on the RS-232 bus pins (IEC 61000-4-2 Air Gap), an integrated dual charge pump requiring only four small 0.1µF external capacitors, and an AutoShutdown Plus mode that automatically disables the charge pump and receivers when the cable is disconnected. The device operates from a single 3.0V to 5.5V supply and includes three active-low INVALID outputs for system monitoring. The MAX3387EEUG+ uses a proprietary low-power charge pump architecture combined with Maxim's AutoShutdown Plus logic, achieving 1 µA typical supply current in shutdown while still supporting 250 kbps data rates. The dual charge pump generates +7V and -7V from the input rail using only flying capacitors, eliminating the need for a ±12V system supply. Typical applications include PDA and cell phone data cables, palmtop computers, battery-powered equipment, embedded industrial controllers, GPS receivers, and point-of-sale (POS) terminals. Its single-supply 3V operation makes it ideal for portable, battery-powered designs where ±12V rails are unavailable. When designing with this device, place the four charge-pump capacitors (typically 0.1µF ceramic) as close as possible to the C1+, C1-, C2+, and V+ pins. Ensure the ESD-protected bus traces are kept short and routed away from sensitive analog signals. For systems that can tolerate a slightly larger TSSOP, the MAX3387ECUG+ offers a commercial 0°C to +70°C temperature range as an alternative. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.

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MAX3388ECUG+ - 2.5V 460kbps RS-232 Transceiver | Maxim
MAX3388ECUG+

MAX3388ECUG+ - 2.5V 460kbps RS-232 Transceiver | Maxim

The Maxim Integrated MAX3388ECUG+ is a 3-driver/2-receiver RS-232 transceiver designed for 2.5V-powered communications equipment. Rated for data rates up to 460kbps and enhanced electrostatic-discharge protection up to 15kV, the device is housed in a 24-pin TSSOP package. It implements a full RS-232 interface for portable and embedded systems that require bidirectional serial communication. An RS-232 transceiver is an interface integrated circuit that converts between complementary TTL/CMOS logic levels and the bipolar voltage levels used by RS-232 equipment. The MAX3388ECUG+ sits within the interface IC hierarchy as an EIA/TIA-232 communications transceiver, combining line drivers and receivers in one package. Its 2.5V supply operation is particularly useful for reducing the power burden in battery-powered phones, personal digital assistants, and other mobile equipment. The principal features include three transmit drivers, two receive inputs, operation from a single 2.5V supply, support for data rates as high as 460kbps, and enhanced ESD protection up to 15kV. These characteristics make the device suitable for portable equipment that must communicate with RS-232 peripherals while preserving a compact, low-voltage power architecture. The device's multi-driver arrangement allows several unidirectional RS-232 outputs alongside two receive channels, enabling asymmetric links such as command, control, status, and diagnostic paths. Its 24-pin TSSOP package provides a conventional surface-mount footprint that can simplify board layout relative to discrete driver and receiver implementations. Low-voltage operation also allows the IC to share a compact portable power rail without requiring a separate 5V interface supply. Typical applications include serial adapters for personal digital assistants, communication ports in cellular telephones, data acquisition equipment, industrial controllers, and portable test instruments. It is particularly appropriate where an equipment designer needs a compact EIA/TIA-232 interface, multiple logic-level outputs, receive inputs, and stronger ESD tolerance on externally accessible serial lines. When laying out a design, keep the transceiver's logic-side traces away from the exposed RS-232 connector and route driver outputs as short, direct connections to the interface pins. Confirm the connector's signal polarity and the logic-level relationship of the connected UART before using each driver and receiver, because the RS-232 electrical standard is not directly compatible with ordinary CMOS signals. This page combines the device's interface functions, RS-232 operating characteristics, verified package information, sourcing guidance, and application-focused design guidance to support faster component selection and implementation. For a replacement, verify the exact suffix, pin assignment, electrical ratings, and system-level RS-232 polarity before production release.

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MAX3389ECUG+ - 2.5V 3/2 RS-232 Transceiver | ADI
MAX3389ECUG+

MAX3389ECUG+ - 2.5V 3/2 RS-232 Transceiver | ADI

Analog Devices MAX3389ECUG+ is a 3-driver, 2-receiver RS-232 transceiver designed for low-voltage serial-interface systems. It operates from a 2.5V supply, supports the EIA/TIA-232 and V.28/V.24 communication standards, provides ±15kV ESD protection on its external interface pins, and is packaged in a 24-pin TSSOP. The device targets portable and mobile equipment requiring a compact, low-power RS-232 interface. An RS-232 transceiver is an interface IC that converts logic-level signals between a host or controller and a cable-based RS-232 link. The MAX3389ECUG+ combines three transmit channels with two receive channels in one package. This mixed 3/2 configuration allows one controller to command three external targets while receiving status or data from two of them, reducing the number of separate interface components required in portable equipment. The primary electrical features are the 2.5V operating supply, a specified 2.35V to 3V transceiver supply range, and ±15kV ESD protection. These characteristics make the device suitable for systems in which connector exposure, limited battery energy, and restricted board area are important design constraints. The enhanced ESD protection helps improve interface robustness when users connect external cables to personal digital assistants, mobile phones, and other handheld communications products. The MAX3389 family implements the electrical signaling required by EIA/TIA-232 and V.28/V.24 interfaces. Driver channels convert TTL-compatible command signals into RS-232 levels, while receiver channels recover RS-232 data as logic-level signals. The integrated multi-channel arrangement also reduces the number of package outlines and PCB land patterns that a design team otherwise needs to manage for several independent serial ports. Typical uses include personal digital assistant connectivity, mobile phone accessories, handheld test equipment, point-of-sale terminals, and compact industrial controllers. The low 2.5V supply requirement allows the interface to operate alongside low-voltage logic, while the TSSOP-24 package supports compact board layouts. Product qualification, ordering, and lifecycle requests can be handled through the Request a Quote form on this page. The primary design consideration is external-signal handling. Although the device has enhanced ESD protection, the board still needs a suitable return path, controlled cable routing, and connector placement that minimizes ESD exposure. Power and signal integrity should be evaluated together because the RS-232 drivers and receivers operate at a higher voltage domain than many modern low-voltage host controllers. This page combines the identified electrical ratings, package information, application context, comparison parameters, and practical design guidance into one engineering reference. It also distinguishes exact drop-in candidates from related interface families and highlights which characteristics must still be confirmed in the manufacturer datasheet before a substitution is released to production.

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MAX338CEE+ - 8:1 Low-Leakage CMOS Analog Mux | Analog Devices
MAX338CEE+

MAX338CEE+ - 8:1 Low-Leakage CMOS Analog Mux | Analog Devices

The Analog Devices MAX338CEE+ is an 8-channel, low-leakage CMOS analog multiplexer with a 1 Circuit 8:1 configuration, 400 ohm on-resistance, and a 16-QSOP package. According to the manufacturer product data, the device connects one of eight inputs to a common output, making it suitable for routing external analog signals in test, measurement, control, and communication systems. The verified listing identifies a single +4.5 V to +30 V supply or dual supplies of ±4.5 V to ±20 V. An analog multiplexer is an analog switch device that selects one signal path among multiple inputs and connects it to a shared output. The MAX338 family is positioned as a low-leakage CMOS analog multiplexer family, with the MAX338 providing eight channels and the related MAX339 providing dual four-channel operation. This hierarchy places the part within analog switches, multiplexers, interface ICs, and broader signal-routing systems. The verified MAX338CEE+ data specifies 400 ohm on-resistance and an 8:1 topology. Analog Devices identifies the MAX338 and MAX339 as pin-compatible upgrades for the industry-standard DG508A and DG509A families. The low-leakage characteristic is useful when source impedance is high, because leakage through an inactive channel can otherwise create measurement errors or interfere with small-signal nodes. The device also supports both single-supply and dual-supply operation, allowing integration into systems with different reference and bias arrangements. Typical uses include data acquisition, automated test equipment, sensor multiplexing, analog signal routing, sample-and-hold systems, and industrial control interfaces. The 8:1 arrangement reduces the number of physical connections required when a controller must inspect several analog sources through one downstream converter or measurement channel. Designers should verify signal amplitude, supply polarity, control logic, switching timing, and package footprint against their particular system before production use. A key design consideration is keeping unused analog inputs, control pins, and supply rails within the manufacturer's specified operating limits. PCB routing should minimize trace resistance and capacitance around high-impedance signal nodes, while grounding and decoupling should follow the datasheet recommendations. This page summarizes verified product, distributor, and manufacturer information; application suitability still depends on the complete electrical specification set.

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MAX338CPE+ - 8:1 CMOS Analog Multiplexer | Analog Devices
MAX338CPE+

MAX338CPE+ - 8:1 CMOS Analog Multiplexer | Analog Devices

The Analog Devices MAX338CPE+ is a single 8:1 CMOS analog multiplexer with 16-pin PDIP packaging, a 400 ohm on-resistance listing, and operation from a single 4.5 V to 30 V supply. It can also operate from dual supplies of ±4.5 V to ±20 V, making it suitable for instrumentation, industrial signal-routing, and test systems that require routing one of eight analog inputs to a common output. The chipdig listing also identifies the device as an 8-channel, low-leakage CMOS analog multiplexer with a 650 ohm resistance specification, so engineers should verify the applicable on-resistance condition against the manufacturer datasheet for their exact supply and temperature configuration. An analog multiplexer is a semiconductor switch that connects one selected input channel to a shared output. The MAX338CPE+ belongs to the CMOS analog switch and multiplexer hierarchy, where low-leakage CMOS construction supports high-impedance measurement circuits. Its 8:1 configuration reduces the number of physical input connections required when a controller must inspect several voltage, sensor, or diagnostic signals sequentially. The common output can then feed an ADC, measurement instrument, amplifier, or further signal-processing stage. Key features include eight selectable analog inputs, a single-ended common output, and a single 16-pin PDIP package. According to the Analog Devices MAX338 product page, the MAX338 and MAX339 devices are improved multiplexers that are pin-compatible upgrades for the industry-standard DG508A and DG509A families. The MAX338 family also supports both single and dual power-supply arrangements. These features distinguish it from multiplexer products that require one supply rail only or provide a different channel-to-pin arrangement. The MAX338CPE+ is a monolithic CMOS device intended to route low-frequency analog signals. Its channel count, supply range, and legacy DIP footprint are particularly useful when creating test fixtures, sensor interfaces, process-control equipment, or diagnostic systems that need to remain compatible with an existing 16-pin design. Because the common output carries the selected channel, the source impedance, signal amplitude, settling behavior, and downstream input range remain important system-level considerations. Typical uses include eight-way sensor selection, automated test equipment, industrial control signal routing, laboratory measurement systems, and instrumentation with multiple analog sources. The same-package DG508A and DG509A reference points are also useful when evaluating a design that was originally built around those established multiplexers. The MAX339 provides a related 4:1 dual-channel function rather than the MAX338's single 8:1 arrangement. When laying out the circuit, place the multiplexer close to the source and destination analog paths to minimize parasitic capacitance and resistance. Keep high-impedance traces short, provide a stable supply reference, and avoid excessive loading on the common output. Engineers should also confirm the exact channel pin assignments, control truth table, electrical limits, and operating-temperature grades in the manufacturer datasheet before treating the part as a production drop-in replacement. This page consolidates verified manufacturer and distributor information, supply configurations, package details, drop-in references, and practical selection guidance. It distinguishes documented pin-compatible alternatives from broader functional equivalents so procurement and engineering decisions can be made without confusing a multiplexer upgrade with a merely similar switch.

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MAX338CSE+ - 8-Channel CMOS Analog Multiplexer | Maxim
MAX338CSE+

MAX338CSE+ - 8-Channel CMOS Analog Multiplexer | Maxim

The Maxim Integrated (now part of Analog Devices) MAX338CSE+ is a monolithic CMOS 8:1 analog multiplexer (also configurable as a dual 4:1) housed in a 16-pin narrow-body SOIC (NSOIC) package. It is built to route one of eight single-ended analog inputs to a common output under control of a 3-bit binary address, with on-resistance (RON) of 400 ohm typical over the full signal range. What is an analog multiplexer? An analog multiplexer (MUX) is a semiconductor switch that selects one of N analog input channels and routes it to a single output line, allowing a microcontroller or ADC to "scan" many sensors or signals through a single high-performance analog front-end. Multiplexers belong to the larger family of analog switches and are foundational building blocks in data acquisition, instrumentation, audio routing, and test equipment. The MAX338 operates from a single +4.5V to +30V supply (or dual ±4.5V to ±20V supplies), giving designers wide headroom for industrial 24V rails and ±15V instrumentation racks. Key features include low-leakage CMOS construction (typically < 1 nA at room temperature), break-before-make switching action that prevents momentary channel cross-connection, ESD protection on all logic and analog pins, and pin-compatibility with the industry-standard DG508A / DG509A, enabling direct drop-in upgrade to lower leakage. Logic inputs are TTL/CMOS compatible, simplifying interface to 3.3V and 5V microcontrollers. The MAX338 is fabricated on a low-leakage dielectric-isolation CMOS process that minimizes parasitic capacitance and channel-to-channel charge injection. Internal logic-level translation allows the digital inputs (A0, A1, A2, EN) to be driven directly from modern microcontrollers. The device is specified over the commercial 0C to +70C temperature range, making it well suited for indoor test equipment and laboratory instrumentation rather than industrial or automotive use; for extended temperature ranges see the MAX338E variant. Typical applications include data-acquisition front-ends scanning multiple thermocouples or analog sensors, audio signal routing in mixing consoles and broadcast equipment, automated test equipment (ATE) pin boards, instrumentation multiplexer and sample-and-hold front ends, industrial process control signal multiplexing, and medical patient-monitoring analog front ends. Designers choose it when they need more analog inputs than their ADC provides and require clean, low-leakage switching. When designing with this device, place 0.1uF decoupling capacitors close to V+ and V- (or GND for single-supply use) and keep analog traces short to minimize crosstalk. Ensure all unused digital and analog inputs are tied to a defined logic level (not left floating) to prevent channel-to-channel leakage paths. This page synthesizes distributor pricing, drop-in alternatives, application guidance, and pin-level design notes that complement the manufacturer datasheet.

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MAX338EEE+ - 8:1 Low-Leakage CMOS Multiplexer | Maxim Integrated
MAX338EEE+

MAX338EEE+ - 8:1 Low-Leakage CMOS Multiplexer | Maxim Integrated

The Maxim Integrated MAX338EEE+ is an 8:1 low-leakage CMOS analog multiplexer with 400 ohm on-resistance, supplied in a 16-QSOP surface-mount package. It connects one of eight inputs to a common output and operates from a single +4.5 V to +30 V supply or from dual ±4.5 V to ±20 V supplies. The MAX338 family also includes dual 4-channel configurations for designs requiring two independently selected signal paths. An analog multiplexer is a semiconductor switching network that routes one selected input to a shared output. The MAX338 belongs to the CMOS analog switch and multiplexer hierarchy, where low leakage is valuable when measuring weak, high-impedance signals or when unused channels must contribute little error to the measurement system. It also supports positive-only and split-supply analog systems, allowing the same switching architecture to serve instrumentation, test, measurement, and signal-routing equipment. Verified product information identifies one analog switch circuit, an 8:1 configuration, 400 ohm on-resistance, a 16-QSOP package, and low-leakage CMOS construction. The single-supply operating range is +4.5 V to +30 V, while dual-supply operation extends from ±4.5 V to ±20 V. These wide ranges permit use with legacy ±15 V analog circuits as well as modern single-rail systems. The EEE ordering code is associated with the industrial-grade 16-terminal surface-mount variant shown in distributor data. Because the MAX338 is a monolithic CMOS multiplexer, its internal channels share one common output. This architecture minimizes the number of external signal paths in a multi-source measurement design, although it does not provide simultaneous access to all eight channels. Selection should therefore be based on required channel count, acceptable on-resistance, leakage limit, supply topology, and the voltage and current levels present at each switched node. Detailed leakage, bandwidth, charge-injection, and switching-time figures were not supplied in the verified excerpts and must be taken from the manufacturer datasheet. Typical uses include automated test equipment, data-acquisition systems, sensor-signaling interfaces, process-control instrumentation, and laboratory measurement front ends. The device is particularly useful when many potential analog inputs must share one amplifier, converter, or data-acquisition channel. A suitable external circuit must also keep every input and output within the device's absolute maximum ratings during switching and fault conditions. Designers should verify control logic levels, input overvoltage tolerance, analog signal range, and break-before-make behavior against the full datasheet before layout release. Care should be taken around unused channels, signal-source impedance, and injected charge because low leakage alone does not guarantee low measurement error. Input filtering may be appropriate when fast transients or high-energy events are possible. This product record combines verified manufacturer and distributor information, explicit data-gap markers, same-family drop-in candidates, and practical selection guidance. It is intended to help engineers identify the correct 16-QSOP multiplexer while separating confirmed MAX338EEE+ attributes from parameters that still require direct datasheet verification.

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MAX338EEE+T - 8:1 CMOS Analog Multiplexer | Maxim Integrated
MAX338EEE+T

MAX338EEE+T - 8:1 CMOS Analog Multiplexer | Maxim Integrated

Maxim Integrated MAX338EEE+T is an 8:1 single-ended CMOS analog multiplexer with 400 ohm on-resistance, housed in a 16-pin SSOP package. It selects one of eight analog inputs and connects the selected input to a common output. The device operates from a single +4.5 V to +30 V supply or from dual supplies of ±4.5 V to ±20 V, making it suitable for both positive-rail and split-supply instrumentation. An analog multiplexer is an interface IC that routes multiple analog signals through one common connection. The MAX338 belongs to the CMOS analog switch family, combining an 8:1 multiplexer with low-leakage switching elements. This allows a measurement system, data-acquisition circuit, or industrial control board to reduce the number of dedicated signal paths while preserving accurate analog connectivity. The principal features include an 8:1 configuration, 400 ohm on-resistance, and 20 pA leakage. Its address and enable controls are TTL-compatible from +0.8 V to +2.4 V across the specified temperature and supply ranges. These characteristics make the device useful when a system must select among sensor outputs, measurement inputs, or multiplexed test points without using a separate connector for every channel. The MAX338 is fabricated using Maxim's 44 V silicon-gate process, supporting operation with relatively wide supply voltages. The manufacturer identifies the MAX338 and MAX339 as improved, pin-compatible upgrades for the industry-standard DG508A and DG509A. Related MAX328 and MAX329 devices provide lower leakage and charge injection but higher on-resistance, creating a useful trade-off between leakage, switching transients, and signal resistance. Typical applications include data-acquisition systems, automated test equipment, industrial process monitoring, medical instrumentation, and communication-interface boards. An eight-channel bank can route eight analog sources into one amplifier, comparator, or converter input, while complementary address and enable logic controls the selected path. The industrial temperature grade also supports equipment intended for factory, laboratory, and communications environments. PCB design should place input and output traces away from high-speed digital paths, provide a stable ground reference, and observe the supply and decoupling requirements in the manufacturer datasheet. Because the multiplexer contributes 400 ohm of series resistance and switching transients, the receiving amplifier should have sufficiently high input impedance and bandwidth. Fault conditions should also be checked with the device disabled so that unused inputs cannot create unintended loading or signal transitions. This product page combines manufacturer specifications, package information, functional context, replacement guidance, and application-oriented design guidance. It helps engineers evaluate the MAX338EEE+T against same-package family options while accounting for channel configuration, on-resistance, leakage, and control-interface compatibility.

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