74VHC123AMX

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74VHC123AMX

IC MULTIVIBRATOR 8.1NS 16SOIC

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Spezifikationen

Supplier onsemi
Package Tape & Reel (TR),Cut Tape (CT)
Series 74VHC
ProductStatus Active
LogicType Monostable
IndependentCircuits 2
SchmittTriggerInput Yes
PropagationDelay 8.1 ns
Current-OutputHighLow 8mA, 8mA
Voltage-Supply 2 V ~ 5.5 V
OperatingTemperature -40°C ~ 85°C
MountingType Surface Mount
Package/Case 16-SOIC (0.154, 3.90mm Width)

Übersicht

Description

74VHC123AMX is a dual retriggerable monostable multivibrator (two independent one-shot circuits) in the 74VHC CMOS family. Each channel generates a fixed-width output pulse in response to its trigger inputs, with the width set by an external RC network. It is retriggerable (a new trigger can extend the current pulse) and includes asynchronous clear inputs. Outputs are complementary (Q and Q̄) for each channel. Operating voltage is the VHC range (typically 4.5–5.5 V, with some variants supporting 2–6 V). The AMX suffix indicates a specific 8-pin package/temperature variant; check the datasheet for exact pinout and packaging. Common uses include timing and pulse-generation, debouncing, pulse-stretching, and timing in digital circuits. For exact trigger polarities, edge sensitivity, and the pulse width formula (t ≈ k·R·C) see the vendor’s datasheet (e.g., TI/NXP).

Features

Here are the key features of 74VHC123AMX:
- Dual retriggerable monostable multivibrators (two one-shot circuits)
- Independent timing circuits with separate triggers and asynchronous clear
- Pulse width programmed by external RC network (Rext and Cext)
- Each channel provides Q and Q̅ outputs
- Asynchronous clear (active-low) overrides and terminates pulses
- Wide supply range: Vcc = 2.0 V to 5.5 V; CMOS/TTL-compatible input thresholds
- Very High Speed CMOS (VHC) family: fast operation with low power
- ESD protection and RoHS compliant; extended temperature options available (e.g., -40 °C to +125 °C)
- Package options typically include 14-pin devices (AMX variant denotes specific package/traceability)
Notes: Timing is externally set; device is suitable for pulse-width modulation, debounce, or timing/edge-detection applications.

Package

The 74VHC123AMX is supplied in a 14-pin SOIC (SO-14) surface-mount package. Manufacturers may also offer the 74VHC123 in DIP-14 and TSSOP-14 variants depending on the supplier.

Pinout

Pin count: 16 pins (standard DIP/SOIC/SSOP packages).
Function: Dual monostable (one‑shot) multivibrator (74VHC123). Each channel provides A and B trigger inputs, an active‑low clear, external R and C timing pins to set pulse width, and complementary outputs (Q and /Q). It generates a fixed-duration pulse on triggering (retriggerable behavior depending on input timing) and is powered by a single VCC with GND.

Manufacturer

Manufacturer: Nexperia.
What kind of company: Nexperia is a global semiconductor manufacturer (spun off from NXP) that designs and mass-produces standard logic ICs, discrete semiconductors (diodes, transistors, MOSFETs) and power-management devices for automotive, industrial and consumer applications.

Application

74VHC123AMX is a dual retriggerable monostable multivibrator. Applications:
- Generate precise, programmable-width output pulses with external RC networks
- Pulse stretching and pulse shaping
- Switch debouncing
- Edge detection and timing/synchronization in microcontroller systems
- Gating and delay elements in digital timing circuits
- PWM timing and event-driven logic
- Programmable delay lines and one-shot pulse generators for measurement, data acquisition, and control systems

Equivalent

74VHC123AMX is a dual retriggerable monostable. Direct equivalents: 74VHC123 (Nexperia), SN74VHC123 (TI), MC74VHC123 (ON Semiconductor). Other functional equivalents (watch logic‑level/timing differences): 74HC123 / SN74HC123, 74HCT123, CD4538B, SN74LS123.

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