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74VHC393FT

74VHC393FT

Toshiba Semiconductor and Storage
Counter IC Binary Counter 2 Element 4 Bit Negative Edge 14-TSSOP
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Overview

The 74VHC393FT is a high-speed CMOS dual 4-bit binary counter containing two independent 4-stage ripple counters. This AEC-Q100 compliant device is designed for low-power applications with wide supply voltages ranging from 2 V to 5.5 V, making it suitable for both legacy 5V systems and modern 3.3V logic.

Why Choose This Part

The IC features power-down protection on all inputs, allowing input voltages up to 5.5 V even when the supply voltage is lower. Its 115 MHz count rate and low power dissipation (4.0 microamps max at 25 degrees C) make it an efficient choice for high-speed signal processing in harsh automotive environments.

Applications

Frequency Division
Utilizing the ripple counter architecture to divide a high-frequency clock signal (up to 115 MHz) into lower frequencies for timing circuits.
Digital Instrumentation
Used in automotive clusters or industrial meters to count pulses from encoders or speed sensors.
Time-Delay Generation
Providing cascaded counting for hardware-based watchdog timers or delay sequencers without MCU intervention.
Pulse Accumulation
Tracking discrete events in high-speed data acquisition systems where negative-edge triggering is required.

Key Specifications

Reset Asynchronous
Direction Up
Count Rate 115 MHz
Logic Type Binary Counter
Trigger Type Negative Edge
Mounting Type Surface Mount
Package / Case 14-TSSOP (0.173", 4.40mm Width)
Voltage - Supply 2 V ~ 5.5 V
Number of Elements 2
Operating Temperature -40degC ~ 125degC
Supplier Device Package 14-TSSOP
Number of Bits per Element 4

Getting Started

To integrate this counter, connect the CLK input to your signal source and use the asynchronous Clear (CLR) pin to reset the count state. Ensure the 14-TSSOP footprint is correctly mapped in your PCB software, and provide a 0.1 microfarad decoupling capacitor near the VCC pin (Pin 14).