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Productos (272)
HCF4093BE - Quad 2-Input NAND Schmitt Trigger | STMicroelectronics
The STMicroelectronics HCF4093BE is a CMOS quad 2-input NAND gate with Schmitt-trigger inputs, supplied in a 14-pin PDIP through-hole package. Each of the four independent gates performs the NAND function while exhibiting Schmitt-trigger hysteresis on both inputs, allowing slow or noisy edges to be cleaned into sharp, jitter-free logic transitions. The Schmitt trigger is a comparator-style input stage with two distinct switching thresholds: a higher positive-going threshold (VP) and a lower negative-going threshold (VN). The difference between them (VH = VP - VN) is defined as the hysteresis voltage. This built-in hysteresis makes the part ideal for conditioning slow analog or mechanical signals (RC oscillators, switch debouncing, sensor pulses) directly into clean logic levels without external comparators. The HCF4093 belongs to the 4000-series CMOS logic family, characterized by wide supply operation from 3 V to 18 V, low quiescent power consumption, and high noise immunity. Its four gates share common VDD and VSS pins. Each input is a standard CMOS inverter-style stage feeding a NAND tree, and outputs are buffered totem-pole drivers capable of sourcing/sinking typical 4000-series currents. As a CMOS part, all inputs include ESD-protection networks and should not be left floating. Typical applications include waveform and pulse shaping, monostable and astable multivibrators, line receivers for noisy environments, simple RC and crystal oscillators, and debounce circuits for mechanical switches. Hysteresis prevents multiple triggering on bouncing or slowly rising edges, eliminating the need for external Schmitt-trigger comparator stages. When designing with this device, observe standard CMOS handling: tie unused inputs to VDD or VSS (never leave them open) and place a 0.1 uF decoupling capacitor as close as possible to the VDD pin. Output drive capability is moderate (a few mA), so check fan-out when driving multiple loads or long traces.
HCS361-I/P - KEELOQ Code Hopping Encoder, 8-PDIP | Microchip
The Microchip Technology HCS361-I/P is a code hopping encoder that pairs a 28-/32-bit programmable serial number with a 64-bit programmable encryption key to produce a 67-bit transmission frame (32-bit hopping code + 35-bit fixed code) for unidirectional Remote Keyless Entry (RKE) and access-control systems. Packaged in an 8-pin PDIP through-hole outline and rated for operation from 2.0 V to 6.6 V (per Microchip datasheet) or 3.0 V to 6.9 V (per some distributor listings), it ships as a -40 °C to +85 °C industrial-grade part with the “-I” temperature suffix and the “/P” PDIP package suffix. A code hopping encoder is a security-focused transmitter IC that transmits a different encrypted code on every button press, defeating simple replay attacks. It belongs to the broader category of encoders/decoders/multiplexers (logic ICs), and within Microchip's portfolio it is a member of the KEELOQ family — a hierarchy that runs encoder -> KEELOQ hopping encoder -> security transmitter IC -> logic IC -> integrated circuit. The HCS361 sits between the lower-cost HCS300/HCS301 and newer HCS362/HCS365 devices, balancing small package outline, low BOM cost, and patented hopping-code security. Key features include 28/32-bit serial number programming, 64-bit encryption key storage in EEPROM, unique 67-bit transmission per button event, three button inputs (S0/S1/S2), a 4-word (S0..S3 with PWM) option (per family datasheet), low standby current for battery-powered fobs, automatic code-word synchronization, and Microchip's patented KEELOQ learning algorithm so a paired receiver only needs to remember the last transmitted code. HCS361-I/P is the industrial temperature (-40 °C to +85 °C) variant in the through-hole PDIP-8 footprint. The device uses Microchip's KEELOQ nonlinear block-cipher algorithm with a 64-bit manufacturer key and a 16/20-bit discriminator. On every button press the encoder generates a fresh 32-bit hopping code by combining the counter value, the button bitmap, and the encrypted discriminator; the receiver validates the rolling counter and decrypts the discriminator before accepting the transmission, providing strong replay-attack immunity for garage-door openers, gate controls, alarm panels, and automotive RKE. Typical applications include garage-door and gate openers, automotive Remote Keyless Entry transmitters, wireless doorbells, alarm and security system keypads, asset-tracking fobs, and industrial access-control handheld remotes. Pair it with a Microchip HCS compatible receiver decoder (e.g., the receiver side of the HCS family) to complete a one-way secure link. When designing with the HCS361-I/P, observe the VDD decoupling guidance from the datasheet (a 0.1 µF ceramic cap close to the VDD pin), the RF section layout for the companion transmitter PCB, and the four-button debounce pattern in Microchip application notes. The industrial -40 °C to +85 °C range makes this part suitable for outdoor fobs and unheated enclosures, while the through-hole PDIP-8 package simplifies hand-soldering and prototype builds. This page synthesizes distributor pricing, drop-in package alternatives, and practical design notes not found in the manufacturer datasheet alone.
HEF4047BT - CMOS Monostable/Astable Multivibrator SOIC-14
The Nexperia (formerly NXP Semiconductors) HEF4047BT is a CMOS monostable/astable multivibrator housed in a 14-pin SOIC (SOT108) surface-mount package. It is a retriggerable astable multivibrator that can be configured as either a positive-edge or negative-edge triggered monostable multivibrator, with output pulse width programmed by external resistor Rt and capacitor Ct. The device includes clamp diodes on inputs, enabling the use of current limiting resistors to interface to voltages in excess of VCC. A multivibrator is a fundamental digital timing element that produces pulse waveforms without a stable DC state, or a single controlled-width pulse (monostable) from a trigger event. Within the digital-IC taxonomy, the HEF4047BT sits in the specialty-logic family of CMOS logic ICs, branching from the broader 4000-series CMOS logic line. Its core role in system design is generating precise time delays or square-wave clocks without software overhead, complementing microcontrollers and PLLs in mixed-signal designs. Key features include wide supply voltage operation from 4.5 V to 15.5 V, low quiescent current of typically 2.4 mA, 50 ns propagation delay, monostable and astable modes in a single device, retriggerable operation, and master reset. The SOIC-14 package provides ease of assembly on standard reflow profiles with MSL Level 1 moisture sensitivity. Internally the HEF4047BT uses CMOS logic gates combined with an external RC timing network to set the output pulse width or oscillation frequency. Its high noise immunity (typical of 4000-series CMOS) and low power consumption make it well-suited to battery-powered and industrial environments. The retrigger capability allows the output pulse to be extended by repeated triggers within the timing window. Typical applications include missing-pulse detection, bounce-free switches, frequency discriminators, timing circuits, clock-pulse generation, and monostable multivibrators for digital debounce in industrial controls, instrumentation, and consumer electronics. Engineers often pair it with the CD4013 or CD4093 for cascaded timing chains. When designing with the HEF4047BT, select Rt and Ct to place the timing well within the part's specified range, keep Rt traces short to avoid stray capacitance pickup, and bypass VCC with a 100 nF ceramic capacitor placed close to pin 14. Note that the HEF4047BT,653 reel-pack variant and HEF4047BT,652 bulk-pack variant share identical silicon and pinout. This page synthesizes distributor pricing, drop-in SOIC-14 alternatives, and practical design notes not found in the manufacturer datasheet alone, including cross-vendor substitutes such as CD4047BCN from onsemi and HCF4047 from STMicroelectronics.
HEF4538BT - Dual Monostable Multivibrator | Nexperia SOIC-16
The Nexperia HEF4538BT is a dual retriggerable-resettable monostable multivibrator in a 16-pin SOIC package, providing two independent precision one-shot timing channels per IC. Each multivibrator features an active-LOW trigger/retrigger input (nA), an active-HIGH trigger/retrigger input (nB), an overriding active-LOW direct reset input (nCD), complementary outputs (nQ and nQ-bar), and dedicated pins (nREXT/CEXT and CEXT) for connecting external timing components REXT and CEXT. A monostable multivibrator (one-shot) is a sequential logic building block belonging to the broader multivibrator family, which also includes astable (free-running) and bistable (flip-flop) variants. Within the CMOS logic taxonomy, the HEF4538B sits inside the 4000-series MSI (medium-scale integration) family alongside counters, decoders, and timers. Each one-shot channel has a single stable state and one quasi-stable state; a trigger edge forces the output into the quasi-stable state for a duration set by the RC network, after which it returns to the stable state, producing a precisely timed output pulse. Key features of the HEF4538BT include a wide supply voltage range of 3.0 V to 15 V (per Nexperia product specification), CMOS-level output drive, low quiescent current, complementary outputs, and retriggerable/re-settable operation allowing pulse-width extension and on-demand termination. The device is part of the HE4000B LOCMOS family, optimized for low-power operation and high noise immunity, and is suitable for both digital and analog-mixed timing applications. Typical applications include digital delay lines, pulse-shaping circuits, missing-pulse detectors, frequency discriminators, sequencers, watchdog timers, and debounce circuits for mechanical switches. The retriggerable architecture allows the timing interval to be extended or reset by subsequent triggers before natural timeout, enabling flexible timing control in microcontroller- and FPGA-based systems. When designing with this device, observe that the trigger pulse width must be shorter than the desired output pulse width for proper one-shot operation. Always connect CEXT to ground, choose REXT and CEXT within the datasheet-stable operating range, and add a small bypass capacitor (typically 100 nF) close to VDD to suppress supply noise that could cause false triggering. The HEF4538BT is the -Q100 automotive-qualified variant's foundation, making it a versatile choice for industrial, consumer, and automotive-grade timing designs. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet, helping engineers rapidly evaluate HEF4538BT for new designs and second-source for legacy CD4538/MC14538 installations.
ISO6763QDWRQ1 - 6-CH 50Mbps 5kVrms Digital Isolator | TI
The Texas Instruments ISO6763QDWRQ1 is an automotive-grade, 6-channel (3/3) reinforced digital isolator delivering 50 Mbps data rate, 5000 Vrms isolation per UL 1577, and 100 kV/us common-mode transient immunity (CMTI) in a 16-pin wide-body SOIC (DW) package operating from -40C to +125C. A digital isolator is a semiconductor device that transfers digital signals across an isolation barrier, galvanically separating two ground domains to block high voltages, reject ground loops, and protect low-voltage circuitry. Within the power-signal-chain hierarchy, digital isolators sit under the isolation products family, alongside isolated transceivers and gate drivers, and are foundational components in industrial and automotive power management systems. Key features include the 50 Mbps data rate supporting fast SPI, UART, and general-purpose GPIO traffic, 1.8 V to 5 V logic compatibility on both sides for direct interfacing with modern MCUs, and the 100 kV/us CMTI rating that keeps signals intact in the presence of aggressive switching transients from SiC and IGBT power stages. The AEC-Q100 qualification makes the part suitable for automotive environments. The ISO676x-Q1 family uses TI capacitive isolation technology, with an SiO2-based barrier providing reinforced isolation. The 3/3 channel configuration (three channels in each direction) supports bidirectional buses such as full-duplex SPI (SCLK, MOSI, MISO plus CS) across the barrier without direction-control pins, reducing firmware overhead and glitch risk. The wide-body DW package provides adequate creepage and clearance for reinforced isolation designs. Typical applications include isolated SPI communication in battery management systems (BMS), isolated UART and GPIO in on-board chargers and traction inverters, isolated communication in motor drives, and industrial PLC I/O isolation. Design consideration: verify the total load capacitance on both sides; at 50 Mbps the output drivers need adequate decoupling (100 nF local plus 4.7 uF bulk per side is a common practice) to maintain signal integrity during simultaneous switching of multiple channels. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LMV761MF/NOPB - 120ns Precision Comparator | Texas Instruments
The Texas Instruments LMV761MF/NOPB is a single, low-voltage precision comparator with a 120 ns response time, push-pull output, and shutdown capability. It operates from a 2.7 V to 5 V supply and is packaged in a compact 6-pin SOT-23 package. The device is intended for precision signal conditioning, threshold detection, and low-noise analog systems where fast decision-making and low supply current are important. A comparator is an analog integrated circuit that compares two input voltages and changes its output state when the differential input crosses a defined threshold. Unlike an operational amplifier, a comparator is optimized for saturated digital-style output states rather than linear amplification. The LMV761 belongs to the broader semiconductor hierarchy of analog ICs, comparator circuits, and low-voltage precision signal-conditioning components. The LMV761MF/NOPB provides a single comparator channel with rail-to-rail input capability, push-pull output, and a shutdown pin. Its 120 ns propagation delay supports fast decision paths, while its low supply current makes it suitable for portable and low-power equipment. The push-pull output avoids the external pull-up resistor normally required by open-collector comparators, simplifying PCB layout and reducing system component count. This comparator is particularly useful when a system must convert an analog measurement into a logic-level decision without adding substantial propagation delay. Its 2.7 V minimum supply voltage supports low-voltage digital and embedded systems, while operation up to 5 V provides compatibility with conventional low-voltage rails. The SOT-23-6 package supports compact placement, although designers should account for the small thermal footprint and exposed pad limitations of the package family. Typical applications include sensor threshold detection, battery and power-supply monitoring, signal crossing detection, window-comparison circuits, industrial control logic, portable instrumentation, and low-voltage embedded systems. The shutdown function can reduce supply current when the comparator is not needed, helping conserve power in always-on equipment. For reliable operation, connect the supply and ground pins according to the manufacturer datasheet, place bypass capacitance close to the device, and treat unused input pins carefully. Input common-mode range, output drive capability, and shutdown logic should be verified against the system requirements before layout release. This page summarizes verified manufacturer and distributor information alongside practical selection guidance, drop-in alternatives, and design considerations not consolidated in a single source.
LSF0102-Q1 - 2-Ch Auto Bidirectional Level Translator | TI
The Texas Instruments LSF0102-Q1 is an automotive-qualified, 2-channel auto bidirectional multi-voltage level translator for open-drain and push-pull applications, packaged in an 8-pin VSSOP (DCU). It operates from 0.95 V to 5.5 V on Vref_A and 1.8 V to 5.5 V on Vref_B, enabling bidirectional translation between 0.95 V and 5.5 V without a direction pin. Data inputs are 5-V tolerant. A voltage level translator is a logic IC that converts signal voltage levels between circuits operating at different supply rails, sitting within the broader hierarchy of voltage translators -> logic ICs -> interface semiconductors. The LSF family uses a pass-gate (transmission-gate) architecture with reference rails, distinguishing it from powered translator families such as TXS/TXB that use MOSFET output stages. Key features include up to 100 MHz up translation and greater than 100 MHz down translation with capacitive loads of 30 pF or less; at a 50 pF load the device supports up to 40 MHz in both directions. This bandwidth covers standard automotive interfaces such as I2C, SPI, GPIO, SDIO, UART, and MDIO. AEC-Q100 qualification makes it suitable for automotive environments. The auto-direction architecture requires no direction-control pin, reducing MCU GPIO overhead and eliminating direction-timing errors. Because the LSF core is a passive pass-gate structure, external pull-up resistors set logic levels on open-drain buses; for push-pull signals, the reference rails Vref_A and Vref_B define the translated levels directly. Typical applications include automotive infotainment I2C buses between 1.8 V SoCs and 3.3 V peripherals, SPI connections between low-voltage MCUs and 5 V sensors, and SDIO/GPIO interfaces in body electronics and cluster modules. Design consideration: because the LSF topology needs external pull-up resistors on open-drain nets, size them against total bus capacitance and target rise time; keep capacitive loading at or below 30 pF to exploit the full 100 MHz translation rate.
LSF0102DDFR - 2-Ch 100Mbps Level Translator | TI
The Texas Instruments LSF0102DDFR is a dual-channel auto-bidirectional multi-voltage level translator supporting both open-drain and push-pull applications. Housed in an 8-pin TSOT-23-8 (DDF) package, it translates signals between voltage domains from 0.95V up to 5.5V at data rates up to 100 Mbps without requiring a direction control pin. A level translator, or voltage level shifter, is a logic IC that enables digital signals to safely cross between circuits operating at different supply voltages, such as 1.8V, 3.3V, and 5V domains. Within the hierarchy of logic ICs, translators sit alongside buffers and bus switches in the signal-interface layer of a system, ensuring reliable communication in mixed-voltage designs. Key features include fully automatic bidirectional translation with no direction pin, support for open-drain buses (I2C, SMBus) and push-pull interfaces (SPI, UART), a wide 0.95V to 5V translation range, and ultra-low quiescent current of 6 uA typical. The fast propagation delay preserves signal timing in high-speed links up to 100 Mbps. Technically, the LSF0102 uses a pass-gate (transmission-gate) architecture. The reference pins VREF_A and VREF_B set the logic levels on each side, and external pull-up resistors define the high levels of each domain. The device senses data direction automatically, making it transparent to the host system and reducing pin count and firmware complexity compared to directional translators. Typical applications include I2C and SMBus level shifting between 1.8V, 3.3V, and 5V domains, SPI and UART interfaces in mixed-voltage embedded systems, general-purpose GPIO translation, and battery-powered portable devices where the 6 uA quiescent current minimizes standby drain. Design consideration: pull-up resistor values directly trade off maximum data rate against power consumption; use lower resistance (1-2 kilohm) for high-speed push-pull operation and higher resistance (4.7-10 kilohm) for low-power open-drain buses.
LT1016CN8 - 10ns UltraFast Precision Comparator | Analog Devices
The Analog Devices LT1016CN8 is an UltraFast 10ns precision comparator with matched complementary TTL/CMOS outputs, latch capability, and single 5V or ±5V supply operation, housed in an 8-pin PDIP (N8) through-hole package. A comparator is an analog building block within the voltage-comparator family of linear integrated circuits that compares two input voltages and drives its output to a digital high or low state depending on the input polarity. Comparators sit in the signal-chain hierarchy between operational amplifiers and logic devices, providing the level decision that interfaces continuous analog signals into digital logic such as TTL and CMOS. High-speed comparators like the LT1016 additionally act as timing and data-slicing elements in measurement and communication systems. Key features of the LT1016CN8 include an UltraFast 10ns typical propagation delay, direct TTL/CMOS logic interfacing while operating off ±5V or a single 5V supply, tight input offset voltage and high gain for precision applications, and matched complementary outputs that extend design versatility. The output stage provides active drive in both directions, eliminating the external pull-up required by open-collector comparators and improving edge symmetry. Technical advantages of the LT1016 architecture include no minimum input slew rate requirement, which allows slow-moving signals to be compared reliably, no power supply current spiking during output transitions, which reduces supply noise in sensitive circuits, and a LATCH pin that retains input data at the outputs when held high, enabling peak-detection and sampling functions. Quiescent negative supply current is only 3mA, allowing the negative supply pin to be driven from a resistive divider without affecting performance. Typical applications include fast sampling and sample-and-hold front ends, high-speed A/D converter input comparators, pulse and timing discriminators, and logic-level translation between analog front ends and TTL/CMOS systems. The 200ns acquisition time noted in the datasheet sample-and-hold application exceeds many monolithic sample-and-hold capabilities. A key design consideration is supply configuration: the LT1016 delivers full performance from ±5V or single 5V rails, but output logic levels must be verified against the connected logic family, and the latch pin should be tied appropriately when latching is not used. This page synthesizes verified datasheet parameters, pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.
LTC1380IGN#PBF - 8-Ch SMBus Analog Mux, 70Ohm | Analog Devices
The Analog Devices LTC1380IGN#PBF is a CMOS single-ended 8-channel analog multiplexer with an SMBus-compatible two-wire digital interface, featuring 70 ohm on-resistance, 10 uA supply current, and a wide 2.7 V to +/-5 V supply range, housed in a 16-pin SSOP (SSOP-16) package. An analog multiplexer (mux) is a switching IC that selects one of several analog input signals and routes it to a single output under digital control, making it a foundational block in the signal-switching hierarchy: multiplexer switch IC -> analog switch -> data conversion front end -> signal chain. Unlike electromechanical relays, CMOS muxes such as the LTC1380 switch in microseconds, consume microamp-level power, and integrate the decode logic on-chip. Key differentiating features include the SMBus-compatible serial interface that requires only two wires (SCL and SDA), four hard-wired SMBus addresses selectable with two external address pins, and the Pb-free (RoHS) SSOP-16 package indicated by the #PBF suffix. The extremely low 10 uA supply current makes the part well suited to battery-powered and remotely powered data-acquisition systems. Architecturally, the LTC1380 uses CMOS transmission-gate switches driven by an on-chip decode stage controlled by the serial port. Break-before-make switching prevents momentary shorting of selected channels, and the 70 ohm on-resistance keeps insertion loss low in moderate-impedance signal paths. The wide 2.7 V to +/-5 V supply capability supports both single-supply 3 V/5 V logic systems and dual-supply analog domains for bipolar signals. Typical applications include industrial data-acquisition front ends, battery-powered sensor monitoring, automatic test equipment channel routing, and general-purpose analog signal selection in embedded systems with an SMBus or I2C-compatible controller. Design-wise, keep the off-channels' source impedance low and add an op-amp buffer after the mux output if the downstream load is capacitive or high-value, because the 70 ohm RON combines with load current to create gain error. This page synthesizes distributor pricing context, drop-in alternatives, pin/package guidance, and practical design notes not found in the manufacturer datasheet.
LTC6993CS6-4 - TimerBlox Monostable Pulse Generator (One-Shot) | ADI
The Analog Devices LTC6993CS6-4 is a monostable multivibrator (one-shot pulse generator) from the TimerBlox family of silicon timing devices, offered in a 6-pin TSOT-23 package with programmable pulse width from 1 µs to 33.6 seconds set by a single external resistor RSET. The part accepts a wide 2.25 V to 5.5 V supply, delivers up to ±20 mA output drive, and exhibits a worst-case trigger-to-output propagation delay of approximately 11 ns, making it one of the fastest precision one-shots in this package class. The S6-4 variant is the retriggerable sub-version: while the output is HIGH, additional rising trigger edges restart the timing interval, allowing the pulse width to be extended indefinitely for missing-pulse detection or watch-dog timeout applications. A monostable multivibrator (also called a one-shot) is a sequential logic block that, on receipt of a single trigger event, produces one output pulse of a defined width and then returns to its stable idle state. Within the broader digital-timing hierarchy, a one-shot sits alongside astable oscillators, counters, and delay lines as a fundamental timing primitive used to convert edges into precisely controlled pulses. The TimerBlox family positions the LTC6993 between simple RC one-shots (poor accuracy) and full microcontroller timer peripherals (high overhead): it provides digital-grade accuracy over a 33,600:1 timing range with no firmware, no crystal, and only one external resistor. Key features of the LTC6993CS6-4 include a master oscillator accuracy of ±1.5% over voltage and temperature, an internal counter that divides the master frequency by N = 4/64/128/256/512/1024/2048/4096, retrigger capability, a separate rising-edge trigger input, and CMOS-compatible output drive. The device is specified over the commercial 0 °C to 70 °C range; an industrial-grade sibling (LTC6993IS6-4) covers -40 °C to 85 °C. Because the output pulse is generated by digital division of a trimmed master oscillator, pulse-to-pulse jitter is dominated by trigger jitter rather than RC drift, giving far cleaner results than discrete 555-based one-shots. Typical applications include missing-pulse detection in safety and sensor monitoring, watchdog timer reset generation, frequency-to-pulse conversion, switch de-bouncing, time-of-flight laser or ultrasonic ranging front-ends, and pulse-stretching for narrow event capture. In each case the LTC6993 replaces either a 555 timer (better accuracy, smaller BOM) or a microcontroller capture/compare channel (faster response, no firmware burden). When designing with this part, select RSET to place the master oscillator in the range that, after the chosen divider N, yields the desired output pulse width; keep the trigger pulse width shorter than the programmed output pulse to guarantee clean retriggering; and place a 0.1 µF decoupling capacitor within 2 mm of the V+ pin to prevent supply transients from disturbing the internal oscillator. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
LTC6993HS6-4 - Mono Pulse Gen One-Shot 1µs-33.6s | ADI
The Analog Devices LTC6993HS6-4 is a monostable multivibrator (one-shot pulse generator) with a programmable pulse width of 1µs to 33.6 seconds, housed in a 6-pin TSOT-23 (S6) package. It belongs to the TimerBlox family of silicon timing devices and provides an 11 ns typical propagation delay. The LTC6993HS6-4 operates from 2.25 V to 5.5 V supply and covers the -40°C to 125°C automotive temperature grade. A monostable multivibrator (also known as a one-shot pulse generator) is a sequential logic element that produces a single output pulse of fixed duration in response to a trigger edge, then returns to its stable state until the next trigger. One-shots sit within the broader category of timer ICs and are widely used for pulse stretching, edge-to-level conversion, missing-pulse detection, and digital debouncing. Because timing accuracy is achieved via a single external resistor (RSET) and the part is fully self-contained, one-shots are easier to design with than discrete RC or 555-based equivalents. Key features of the LTC6993HS6-4 include a wide programmable pulse-width range (1µs to 33.6s) set by RSET, a low 11 ns propagation delay, 2.25 V to 5.5 V single-supply operation, and CMOS-compatible logic inputs/outputs. The device also includes an internal master oscillator derived from RSET, allowing the output pulse duration to be calculated via tOUT = N_DIV × RSET / 50 kΩ × (typical 1.0), enabling precise digital control of pulse width without external capacitors. The architecture uses a precision current reference feeding an internal master oscillator whose frequency is set by RSET; the resulting clock is divided by a fixed N factor to produce the output pulse. An on-chip comparator triggers on the rising edge of the input, with retrigger capability and an optional reset pin on related family members. This analog-digital hybrid approach yields excellent supply-rejection and temperature stability compared to simple 555 timer designs. Typical applications include industrial control pulse generation, automotive system timing, watchdog/missing-pulse detectors, debouncing mechanical switches, frequency discriminator circuits, and low-frequency clock generation in test equipment. The wide 1µs to 33.6s range covers most pulse-stretching needs from high-speed digital logic to multi-second industrial timing. The AEC-Q100 grade (H temp range) makes it suitable for automotive applications. When designing with the LTC6993HS6-4, select RSET between 10 kΩ and 1 MΩ using a low-drift, low-leakage resistor for accuracy, and place it close to the RSET pin to minimize noise pickup. Verify input pulse width is shorter than the programmed output pulse to ensure proper retrigger behavior. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.
LTC6993IS6-2 - TimerBlox One-Shot Pulse Generator | ADI
The Analog Devices LTC6993IS6-2 is a programmable monostable multivibrator (one-shot pulse generator) from the TimerBlox family, delivering a single output pulse whose width is set by a single external resistor RSET. The device integrates fully into a TSOT-23-6 package and provides a pulse width range of 1 µs to 33.6 seconds with a typical propagation delay of only 11 ns. The "-2" sub-version is retriggerable, allowing the output pulse to be extended by additional trigger events received while the output is still active. A monostable multivibrator (also known as a one-shot) is a sequential logic block that, upon receiving a single trigger edge, produces one output pulse of defined width and then returns to its stable (idle) state. It belongs to the broader family of multivibrators (a family that also includes astable/oscillator circuits and bistable/flip-flop circuits) and is widely used in digital control, instrumentation, and signal-conditioning subsystems. The LTC6993 family sits within Analog Devices' TimerBlox silicon timing platform, which also covers oscillators (LTC6905), low-frequency clocks (LTC6930), and divider/edge-delay blocks. Key features of the LTC6993IS6-2 include a 2.25 V to 5.5 V supply range, CMOS-compatible inputs, push-pull output stage capable of sourcing/sinking 20 mA, programmable pulse width via a single resistor to ground, retriggerable behavior (sub-version -2), and an extremely low quiescent current of typically 65 µA. The internal master oscillator is factory-trimmed, eliminating the need for external timing capacitors or trim potentiometers. The DIV pin provides four discrete range selections (1 µs, 1 ms, 1 s, 33.6 s) that scale the RSET current. Typical applications include watchdog timer reset generators, fault-pulse stretchers, switched-mode power supply synchronization, debounce timers for mechanical switches, and pulse-width extension in instrumentation front-ends. In battery-powered designs, the low quiescent current makes it suitable for always-on timing functions. When laying out a board, place RSET close to the SET pin to minimize leakage paths and use a clean ground pour under the part to keep the analog timing reference stable.
LTC6993MPS6-4#TRMPBF - 33.6s Monostable TimerBlox One-Shot | Analog Devices
The Analog Devices LTC6993MPS6-4#TRMPBF is a monostable multivibrator (one-shot pulse generator) with a programmable pulse width of 1 microsecond to 33.6 seconds, housed in a 6-pin TSOT-23 (S6) package. It belongs to the TimerBlox family of versatile silicon timing devices and the -4 variant is falling-edge sensitive and retriggerable, allowing the output pulse to be extended by additional trigger signals received while the output is active. The part operates from a 2.25 V to 5.5 V supply and is specified over the military -55C to +125C temperature range (MP grade). A monostable multivibrator, commonly called a one-shot, is a sequential logic element that produces a single output pulse of fixed duration in response to a trigger input. It belongs to the broader category of multivibrator circuits within digital logic ICs, which also includes astable (free-running) and bistable (flip-flop) variants. The LTC6993's TimerBlox architecture replaces legacy 555-timer-style discrete designs with a precision silicon solution offering tighter tolerance, lower power, and smaller PCB area, while maintaining the familiar single-resistor programming interface. Key features include an 11 ns propagation delay, internal master oscillator set by a single external resistor (RSET), CMOS logic outputs, and a separate divider setting (NAD pin) that selects one of eight pulse-width ranges. The retriggerable -4 variant ignores the rising edge and starts the timing cycle on a falling transition at the trigger input, making it well suited for debounce, missing-pulse detection, and watchdog reset circuits where the pulse must be restarted if a new event occurs before completion. Architecturally, the LTC6993 uses a programmable current source feeding an internal master oscillator whose frequency is set by RSET to a known reference. A divider chain produces eight selectable time bases from 1 microsecond up to 33.6 seconds, and the trigger logic arms the output pulse for one full timing cycle. Output rise and fall times are typically a few nanoseconds, and supply current is approximately 100 to 400 microamps depending on programmed pulse width and output state. Typical applications include watchdog timers, missing-pulse detectors, switch debouncers, frequency discriminators, one-shot pulse generators, and precision delay lines in industrial control, automotive, and instrumentation systems. In these roles, the LTC6993MPS6-4#TRMPBF delivers reliable timing with single-resistor programming, eliminating the need for external capacitors or trim potentiometers. When designing with this device, select RSET between 50 kohm and 800 kohm to set the master oscillator, then choose the appropriate NAD setting to land the desired pulse width within the 1 microsecond to 33.6 second range. Always place a 0.1 microfarad decoupling capacitor close to the V+ pin, and ensure the trigger pulse width is shorter than the programmed output pulse to allow retriggering.
M4T28-BR12SH1 - 48mAh SNAPHAT Lithium Battery + 32.768 kHz Crystal | STMicroelectronics
The STMicroelectronics M4T28-BR12SH1 is a SNAPHAT® top battery-and-crystal module that delivers 48 mAh of lithium backup capacity at 2.8 V with an integrated 32.768 kHz quartz crystal (12.5 pF load), purpose-built as the detachable power source for ST's TIMEKEEPER® series of serial real-time clocks and non-volatile SRAM/Supervisor ICs housed in 28- and 44-pin surface-mount SOIC packages. The SNAPHAT design lets the lithium cell and crystal be snapped onto an SOIC base after reflow, keeping the battery off the board during high-temperature assembly and giving the end product years of battery-backed RTC retention. A lithium coin-cell backup battery is a primary (non-rechargeable) lithium cell that keeps volatile memory and real-time clock registers alive when the system main rail collapses; for non-volatile SRAM supervisors and RTCs it sits in the same supply hierarchy as a coin cell, a supercap-backed supply, and a buck/boost hold-up rail. In the TIMEKEEPER family the SNAPHAT module also carries the 32.768 kHz tuning-fork crystal so that the combined Battery+Crystal pair forms a complete timekeeping sub-assembly — the IC underneath just exposes a top-of-package cavity that the SNAPHAT clips into. Key features include a 48 mAh nominal capacity with lithium chemistry (long-shelf-life primary cell), an integrated 32.768 kHz crystal specified for 12.5 pF load capacitance, a typical operating voltage of 2.8 V and a detachable SNAPHAT housing that allows board-level assembly of the SOIC base before the lithium part is added. ST publishes a multi-year backup time figure and an estimated self-discharge shelf life at +25 °C so the engineer can size RTC retention against product life. Inside the SNAPHAT housing, the lithium coin cell is connected through the SOIC pinout's Vbat/RET pins while the crystal ties to the RTC's oscillator pins; the SNAPHAT body itself provides the mechanical alignment and the battery contact springs. Because the same SNAPHAT accepts both M4T28-BR12SH1 and M4T32-BR12SH1 variants, the top is reusable across ST's 28- and 44-pin TIMEKEEPERS with no board change. Typical applications are RTC + NVRAM backup in industrial controllers, point-of-sale terminals, metering and data-logging equipment, medical instruments needing tamper-proof time, and any system where the lithium cell must be replaced without re-flowing the base SOIC IC. The M4T28-BR12SH1 is the matching SNAPHAT for the M48T201, M48T58, M48T35 and M48T08/18 TIMEKEEPER family. Design consideration: do not expose the SNAPHAT to reflow temperatures above +220 °C — it must be snapped on only after the SOIC base has been soldered. Storage below +30 °C and low humidity extends shelf life, and polarity on the SNAPHAT must match the SOIC base markings to avoid reverse-charging the lithium cell. This page consolidates distributor pricing, exact SNAPHAT specifications, drop-in alternatives from the M4Txx-BR12SH family, and design guidance that supplements the STMicroelectronics datasheet — synthesized for engineers who must select, source, and qualify a TIMEKEEPER battery+crystal module quickly.
M74HC14 - Hex Schmitt Inverter, 6-Channel, CMOS | STMicroelectronics
The STMicroelectronics M74HC14 is a high-speed CMOS hex Schmitt trigger inverter fabricated with silicon-gate C2MOS technology, packaged in 14-pin SOIC, providing six independent inverting buffers with 20% VCC input hysteresis. Each channel delivers a typical propagation delay of 12 ns at VCC = 6 V, balanced symmetrical output impedance with |IOH| = |IOL| = 4 mA minimum drive, and typical quiescent supply current ICC well under LSTTL equivalents while maintaining pin-to-pin compatibility with the M74HC04 non-Schmitt hex inverter. A Schmitt trigger inverter is a digital logic building block that converts a slowly-changing or noisy input waveform into a clean, sharply-transitioning output by using two different switching thresholds: VT+ for the low-to-high transition and VT- for the high-to-low transition. The voltage gap between these thresholds is called hysteresis. Compared with a standard CMOS inverter, a Schmitt trigger is far more tolerant of noisy, slowly-rising, or analog-style input signals, which makes it the standard choice for line receivers, RC oscillators, debounce circuits, and waveform shapers. Within the broader taxonomy, the M74HC14 sits inside the 74HC logic family, which itself belongs to CMOS logic ICs and the wider semiconductor category. Key features include a wide operating voltage range from 2 V to 6 V, 1.2 V typical noise immunity at VCC = 6 V, balanced propagation delays tPLH/tPHL, ESD protection on all inputs, and CMOS-compatible low quiescent current. The Schmitt hysteresis is specified as 20% of VCC, which scales automatically across the supply range, giving reliable switching margins in 3.3 V and 5 V rails alike. The device is built using silicon-gate C2MOS technology, which combines the high-speed LSTTL-class switching performance of bipolar TTL with the low static power consumption inherent to CMOS. Internal diode clamps protect inputs against ESD and latch-up, while the symmetrical output stage provides equal source and sink drive strength so edges remain matched under capacitive loading. Typical applications include waveform shaping and line receivers in industrial control, debounce circuits for mechanical switches and keypads, RC relaxation oscillators for clock generation, monostable and astable multivibrators, and signal conditioning between noisy sensors and downstream logic. Its six channels are common in PCB digital designs for handshake-overs signal lines, sensors, or power-management blocks. When using M74HC14 in oscillator or debounce circuits, choose leakage and hysteresis parameters to balance timing accuracy against power consumption. Input rise/fall times must remain slower than the internal hysteresis response or pulse stretching will distort the output duty cycle. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
M74HCT244B1 - Octal 3-State Bus Buffer, HCT, DIP-20 | STMicroelectronics
The STMicroelectronics M74HCT244B1 is an octal bus buffer with 3-state outputs, fabricated in advanced silicon-gate C2MOS technology and housed in a 20-pin DIP (B1 suffix) through-hole package. The device features two active-low output enable inputs (1OE and 2OE), each governing four bus buffers, with non-inverting data flow from A to Y on each channel. An HCT logic interface — 74HCT — is a high-speed CMOS logic family with TTL-compatible input voltage thresholds (VIH = 2.0 V min, VIL = 0.8 V max) that allows direct interfacing with bipolar TTL outputs while preserving the low power consumption of CMOS. Within the broader taxonomy, the M74HCT244B1 belongs to the buffer/driver category of standard logic ICs (74-series logic > buffer/driver ICs > interface ICs > integrated circuits). This HCT sub-family operates from a single 4.5 V to 5.5 V supply, making it the standard logic choice for 5 V digital systems that must bridge CMOS controllers with legacy TTL peripherals. Key features include a typical propagation delay of 12 ns at VdM8 = 5 V, low quiescent supply current (ICC of 4 µA max per channel), 6 mA standard output drive, and ±20 mA balanced output drive capability at 5 V. All inputs include protection circuits against static discharge and transient excess voltage, and the device is specified over the commercial 0 °C to +70 °C operating temperature range (B1 suffix), with a -40 °C to +85 °C industrial variant (B1R suffix) also available from STMicroelectronics. The C2MOS silicon-gate process yields low power dissipation (ICC quiescent of 80 µA max for the whole IC) while delivering CMOS-equivalent speed. Typical applications include memory and address bus buffering in microprocessor systems, peripheral interface drivers for 5 V logic, LED display driving, and general-purpose bus isolation in industrial control and instrumentation. Two active-low output enables let designers independently disable the upper and lower nibbles, which is convenient for 8-bit bus demultiplexing or for tri-state bus sharing among multiple masters. When designing with this part, place a 0.1 µF decoupling capacitor as close as possible to VCC pin 20 to suppress switching transients, and ensure both 1OE and 2OE are tied high through pull-ups if always-enabled operation is desired. The DIP-20 footprint remains popular for through-hole prototyping and legacy board retrofits, while the surface-mount M74HCT244M1R (SO-20) variant serves modern SMT designs. This page synthesizes STMicroelectronics datasheet parameters, distributor pricing, drop-in 74HCT244 equivalents from ST/TI/onsemi/NXP, and practical design notes not bundled in a single distributor listing.
M74HCT273B1R - 8-Bit D-Type Flip-Flop with Clear, DIP-20 | STMicroelectronics
The STMicroelectronics M74HCT273B1R is an octal D-type flip-flop with master reset (clear), eight positive-edge-triggered D-type storage latches, and TTL-compatible HCT-series CMOS inputs, housed in a 20-pin PDIP (0.300 inch / 7.62 mm) through-hole package. It is specified for a 4.5 V to 5.5 V supply range, delivers a typical maximum clock frequency of 80 MHz at VCC = 4.5 V, and provides non-inverted (true) Q outputs with a maximum propagation delay of 30 ns. An octal D-type flip-flop is a synchronous digital storage element which captures logic levels on eight parallel D inputs at the rising edge of a common clock and holds them on eight Q outputs. The 74HCT family combines low-power high-speed CMOS logic with TTL-compatible input thresholds (VIH = 2.0 V minimum), allowing direct interface with 5 V TTL buses without level shifters. The M74HCT273B1R sits in the digital logic IC hierarchy as: flip-flop -> sequential logic -> logic IC -> integrated circuit -> discrete semiconductor category. Its single-bit-wide clocked register function makes it a foundational building block in bus-oriented digital systems. Key features include a common clock and common master reset (active-low CLR) shared by all eight latches, non-inverted Q outputs, complementary CMOS output drive, low quiescent current of 4 uA, and broad compatibility with 74LS273 and 74HCT273 logic families from multiple vendors. The 20-pin PDIP package retains through-hole compatibility with legacy breadboard and socketed designs, while the HCT input stage directly accepts bipolar TTL drive levels. Technically, the device uses high-performance silicon-gate CMOS to deliver fMAX = 80 MHz (typical) at 4.5 V supply with tPLH around 13 ns and tPHL around 17 ns, all while drawing only a few microamperes of quiescent current. The master reset overrides the clock and asynchronously forces all Q outputs low when driven low. Typical applications include address and data latching in microcontroller expansion logic, I/O port expansion with 74HC595-style shift chains (this part is parallel-load, not serial-shift), debounced pushbutton and rotary-synchronous address, and general-purpose register buffering in TTL-based industrial control and instrumentation systems. When designing with this part, ensure the CLR pin is tied high through a pull-up resistor if asynchronous reset is not used, and provide standard 0.1 uF decoupling close to VCC to maintain noise margin in mixed-signal environments. This page synthesizes distributor pricing, drop-in alternatives, and design guidance beyond the manufacturer datasheet alone.
M74VHC1GT50DFT1G - Single Non-Inverting Buffer/Level Shifter | onsemi
The onsemi M74VHC1GT50DFT1G is a single-gate non-inverting CMOS buffer with TTL-compatible inputs, designed as a logic level shifter between low-voltage TTL signals and a higher-voltage CMOS rail. Housed in a 5-pin SC-88A (TSOP-5/SC-70-5/SOT-353) surface-mount package, the part operates from a 1.65 V to 5.5 V VCC supply, delivers a typical propagation delay of 3.5 ns at 5 V, and draws only 1 µA maximum quiescent current at 25 °C. What is a non-inverting buffer / level shifter? It is a single-bit logic device that regenerates an input signal to a full-rail output without inverting its polarity. When TTL logic swings (0.8 V/2.0 V thresholds) must drive a higher-voltage CMOS rail (3.3 V or 5 V), a TTL-to-CMOS level shifter buffer is required; the device sits in the signal chain between an upstream controller and a downstream CMOS load, restoring logic levels and providing isolation. This hierarchy places it under: buffer → line driver → logic IC → integrated circuit → semiconductor. Key features include TTL-compatible input thresholds (VIL = 0.8 V, VIH = 2.0 V when VCC = 5 V), CMOS-compatible outputs (VOH > 0.8·VCC, VOL < 0.1·VCC at rated load), 5 V tolerant inputs with power-down protection on both inputs and outputs, and balanced propagation delays. The part is fabricated with silicon-gate CMOS technology that achieves bipolar-Schottky-TTL-like speed while maintaining CMOS-level quiescent dissipation. The SC-88A/TSOP-5 footprint occupies only ~2.0 mm × 2.1 mm of board area. Typical applications include interfacing 5 V TTL peripherals to 3.3 V or 2.5 V CMOS logic domains, signal conditioning in mixed-voltage microcontroller designs, and clock or single-line data buffering in portable, industrial, and consumer systems. Designers select this part when board space is constrained and a true single-gate buffer is required without the overhead of multi-channel drivers. A primary design consideration is input-edge speed: although the device accepts slow TTL edges, the output rise/fall time depends on the load capacitance and VCC. Decouple VCC with a 0.1 µF ceramic capacitor placed as close as possible to pin 5, and avoid driving large capacitive loads without a series damping resistor. This page synthesizes distributor pricing, drop-in same-package alternatives from onsemi and competing vendors, and practical design notes that go beyond the manufacturer datasheet summary.
MAX368CPN+ - 8:1 Fault-Protected Analog Mux, 1.8kOhm | Maxim
The Analog Devices (Maxim Integrated) MAX368CPN+ is a fault-protected 8-channel (8:1) analog multiplexer with internal data latches and a 1.8 kOhm on-resistance, housed in an 18-pin PDIP (0.300 in / 7.62 mm) package. An analog multiplexer is a switch network that selects one of several analog input signals and routes it to a single output under digital control. Within the signal-chain hierarchy, the analog multiplexer sits between sensors or signal sources and amplifiers or ADCs, and is itself a member of the broader analog switch IC family. Fault-protected multiplexers add a critical layer: their inputs tolerate fault voltages far beyond the supply rails, and outputs are forced to a high-impedance state when power is removed, protecting downstream circuitry. Key features of the MAX368 include overvoltage protection up to plus or minus 35V at the analog inputs, channels automatically turned off when power is lost, all digital inputs TTL and CMOS compatible, and internal data latches for channel selection so the addressed channel is held without continuous drive of the address lines. Technical depth: the device operates from plus or minus 15V supplies with 5 nA typical leakage, and switches in approximately 1.5 microseconds on-time and 1 microsecond off-time with break-before-make switching action, ensuring the selected channels never short together during transitions. The C-grade temperature specification covers commercial ranges; E and M grades exist for extended and military environments. Typical applications include industrial data acquisition front ends where wiring faults or misconnection would otherwise destroy a standard CMOS mux, test and measurement input selector stages, and ATE (automated test equipment) channel routing where inputs may exceed supply rails. Design consideration: the 1.8 kOhm on-resistance must be accounted for in settling-time budgets when driving sample-and-hold or ADC inputs, particularly at higher source capacitance. This page synthesizes distributor pricing, verified drop-in grade variants, and practical design notes beyond the summary on the manufacturer datasheet.
MAX9100EUK+T - 1.0V 5µA Micropower Comparator | Analog Devices
The Analog Devices MAX9100EUK+T is a single-supply micropower voltage comparator with 1.0V to 5.5V operation, 5µA quiescent current, and a 5-pin SOT-23 package. It is designed for battery-powered systems that require low-voltage decision-making without the higher supply requirement or current consumption of conventional comparators. A micropower comparator is a voltage-regulator-family analog semiconductor that compares two input voltages and produces a push-pull logic output indicating their relationship. The MAX9100 belongs to the comparator hierarchy and is used as a simple decision element, protection element, or threshold detector between an analog sensor and a digital system. Its low supply voltage and low quiescent current make it suitable for single-cell and coin-cell powered equipment. Key features include operation from a single 1.0V to 5.5V supply, 5µA quiescent current, rail-to-rail input capability, and an open-drain output according to the manufacturer comparison information. The common-mode input range includes the negative supply rail, which helps monitor low-voltage battery signals. The MAX9100EUK+T is specified in the 5-pin SOT-23 package and is supplied in tape-and-reel packaging. The MAX9100 is intended for low-energy signal-chain designs where the comparator must operate directly from a depleted battery or regulated low-voltage rail. Because its supply range begins at 1.0V, it can remain useful as the battery approaches its discharge endpoint. The device is optimized for single-cell systems rather than high-voltage industrial comparison tasks. Typical applications include battery threshold detection, portable sensor interfaces, low-voltage power sequencing, window or level comparison, and simple over-discharge indication. In these systems, the comparator can establish whether a measured voltage is above or below a reference without requiring a powered analog front end with a higher minimum supply. Designers should verify the exact output topology, input limits, propagation delay, and operating-temperature ratings against the current manufacturer datasheet before layout. Input and supply decoupling should be placed close to the device, and unused comparator inputs must not be left floating. The manufacturer application information is the authoritative reference for electrical limits and recommended usage. This product page combines verified manufacturer and distributor information with practical application guidance, pricing context, and design considerations that help engineers evaluate the MAX9100EUK+T for low-voltage battery systems.
MAX9675ECQ+ - 16x16 110MHz Video Crosspoint Switch | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX9675ECQ+ is a 110MHz, 16x16 non-blocking video crosspoint switch with programmable gain, housed in a 100-pin TQFP (14x14 mm) package. It integrates 16 buffered inputs and 16 buffered outputs, allowing any input to be routed to any output (or to multiple outputs simultaneously) without external buffering. The device operates from a single 2.7V to 5.5V supply and supports -40C to +85C ambient operation. A crosspoint switch is a configurable analog/digital routing element used to connect any of N inputs to any of M outputs under serial or parallel control. Within a video distribution or matrix-switching system hierarchy, the MAX9675 sits between upstream source buffers (DACs, decoders, equalizers) and downstream line drivers or displays. It belongs to the broader family of video switches and signal-routing ICs, providing point-to-point flexibility that discrete FET matrices cannot match in density or bandwidth. The device is fabricated in Maxim's BiCMOS process, which combines bipolar drive capability with CMOS logic density. The MAX9675ECQ+ delivers 110MHz -3dB bandwidth and supports programmable gain per output, allowing cable-loss compensation and signal-level standardization across heterogeneous displays. Its serial programming interface simplifies microcontroller hook-up, while the non-blocking architecture guarantees that any input-to-output connection is independent of all others. Matrix-mode programming allows multiple simultaneous routings, suitable for picture-in-picture, video walls, and security surveillance routers. Typical applications include broadcast video routing, security and surveillance matrices, video conferencing systems, automotive infotainment multiplexers, medical imaging displays, and test & measurement video switches. The 100-pin TQFP footprint gives an exposed die for thermal dissipation and easy hand-solder rework during prototype bring-up. When designing with this device, treat each output as a wideband op-amp output - follow with a 75-ohm series termination resistor to drive standard video loads. Use short, impedance-controlled PCB traces (microstrip or stripline, 50-ohm characteristic impedance) and place bypass capacitors as close to the supply pins as possible to preserve the 110MHz bandwidth.
MC10EL32DTG - 5V ECL ÷2 Divider, 8-TSSOP | onsemi
The onsemi MC10EL32DTG is a 5V ECL (Emitter-Coupled Logic) divide-by-2 frequency divider supplied in an 8-pin TSSOP surface-mount package. The device contains one divide-by-2 element that toggles on the rising edge of the differential clock input, producing complementary ECL Q and Q-bar outputs suitable for high-speed clock tree applications. Operating from a single −4.2V to −5.7V ECL supply rail with PECL compatibility via external bias, the part delivers sub-nanosecond propagation delay characteristics typical of the 10H/100H ECL logic family. An ECL divider is a digital logic device that divides an input clock frequency by an integer factor (here, 2) using current-steering bipolar transistor stages. ECL devices occupy the top of the logic family hierarchy (faster than TTL/CMOS but higher power consumption), and the MC10EL32 specifically provides the high toggle rates required by telecommunications, instrumentation, and test equipment clock distribution where low phase noise and deterministic timing are paramount. Key features include a VBB reference voltage output that allows single-ended input operation by biasing an unused differential input as a switching reference, asynchronous reset capability for initialization, and complementary differential ECL outputs. The 8-TSSOP package provides a 0.65mm pitch and compact board footprint suitable for high-density backplane designs. Architecturally, the MC10EL32 uses differential current steering with internal emitter-follower output buffering, producing typical propagation delays under 1 ns while maintaining low output skew between Q and Q-bar. The internal VBB reference simplifies PCB design by eliminating the need for external bias networks when single-ended clocks must be AC-coupled. Typical applications include clock synthesis in SONET/SDH telecommunications equipment, frequency counter prescalers, high-speed test and measurement instrumentation, and radar/digital IF signal processing. The PECL-compatible threshold also enables use in 3.3V LVPECL systems via level shifting. When designing with this part, maintain 50-ohm impedance-controlled transmission lines on all ECL signal traces to preserve edge fidelity, and provide robust bypassing (0.1 µF and 0.01 µF capacitors) close to the VEE pin. Use the VBB pin only as a reference bias - it cannot source significant load current. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that supplement the manufacturer datasheet and help engineers select, source, and implement the MC10EL32DTG in high-speed clock distribution designs.
MC14071BDR2G - Quad 2-Input OR Gate, 3-18V CMOS, SOIC-14 | onsemi
The onsemi MC14071BDR2G is a B-suffix series Quad 2-Input OR Gate built with P-channel and N-channel enhancement-mode CMOS transistors in a single monolithic structure, supplied in a 14-pin SOIC package. It contains four independent 2-input OR gates and operates across a wide supply voltage range of 3 V to 18 V DC, with logic-level compatibility across the full range. An OR gate is a fundamental combinational logic device that outputs a logic HIGH whenever at least one of its inputs is HIGH; four such gates share a common power rail in the MC14071B, forming part of the 4000-series CMOS logic family. This family sits within the broader hierarchy: logic gate -> combinational logic -> digital IC -> integrated circuit -> semiconductor. The MC14071BDR2G is widely used as a glue-logic building block in mixed-signal systems, replacing discrete transistors and providing reliable logic OR-ing where board-level routing is critical. Key features include extremely low quiescent supply current (typically 0.5 nA per gate at 5 V), high noise immunity of 45% of VDD minimum, and 5 V, 10 V, and 15 V parametric ratings per JEDEC JESD 20. Output drive is symmetric CMOS with balanced rise/fill characteristics and ESD protection on all inputs. The MC14071BDR2G's buffered-output architecture provides consistent fan-out and clean logic levels across the supply range, while inputs are diode-protected against over-voltage transients. The MC14071BDR2G uses a complementary MOS (CMOS) process in which P-channel pull-ups and N-channel pull-downs are co-integrated; this yields the family's hallmark near-zero quiescent current (current flows only during switching), making it ideal for battery-powered equipment. Designers can cascade gates for combinatorial logic, use the part as a logic-level translator between 5 V and 12 V domains, or wire OR multiple interrupt sources together for MCU monitoring. The 14-SOIC footprint is footprint-compatible with the rest of the MC140xx family, allowing easy migration to NAND, AND, NOR or XOR equivalents when board real-estate is reserved. Typical applications for the MC14071BDR2G include industrial control logic, automotive body electronics, battery-powered instrumentation, alarm-system OR-tying, and general-purpose glue logic in mixed-signal PCBs. The wide 3-18 V supply tolerates 12 V and 15 V analog rails, simplifying designs that interface to legacy analog sections. When designing with this part, observe standard CMOS handling precautions: tie all unused inputs to VDD or GND to prevent floating-input oscillation and extra current draw. The MC14071BDR2G is a direct functional replacement for the legacy CD4071B from Texas Instruments and is drop-in compatible on most 14-pin SOIC layouts.