# SN54HC393 / SN74HC393 Dual 4-Bit Binary Counters

## Overview
These devices contain two independent 4-bit binary counters in a single package, each with a clear (CLR) and clock (CLK) input. They can implement N-bit binary counters, dividing input frequencies and providing submultiple timing signals.

## Features
️· Dual 4-bit binary counters
️· Individual CLK and CLR inputs
️· Capable of dividing by up to 256
️· Parallel outputs for timing signals
️· Low power consumption (80µA max)
️· Wide operating voltage range (2V to 6V)
️· Can drive up to 10 LSTTL loads
️· Typical propagation delay of 13ns

## Electrical Characteristics
️· Supply Voltage: 2V to 6V
️· Input Voltage High (VIH): VCC dependent (e.g. 1.5V @ 2V VCC)
️· Input Voltage Low (VIL): VCC dependent (e.g. 0.5V @ 2V VCC)
️· Output Voltage High (VOH): VCC dependent
️· Output Voltage Low (VOL): VCC dependent

## Packages Available
️· FK (Ceramic Chip Carrier)
️· DB (Plastic Small Outline)
️· PW (Plastic Small Outline Package)
️· CDIP
️· CFP
️· LCCC
️· TSSOP

## Absolute Maximum Ratings
️· Supply Voltage: -0.5V to 7V
️· Input Clamp Current: ±20mA
️· Output Clamp Current: ±20mA
️· Continuous Output Current: ±25mA
️· Continuous Current through VCC or GND: ±50mA

## Timing Characteristics (Typical)
️· Propagation Delay (tpHL/tpLH): 13ns
️· Pulse Duration (tWH/tWL): Dependent on VCC (e.g., 16-120ns)
️· Setup Time (tsu): 5ns
️· Hold Time: Not Specified

## Ordering Information
Various packages and temperature ranges are available, including options for military applications (SNJ54HC393). See datasheet for specific part numbers.