M74HC393 Datasheet PDF | STMicroelectronics

STMicroelectronics M74HC393

The M74HC393 is an high speed CMOS DUAL BINARY COUNTER fabricated with silicon gate C2MOS technology. This counter circuit contains independent ripple carry counters and two 4-bit ripple carry binary counters, which can be cascaded to create a single divide by 256 counter. Each 4-bit counter is incremented on the high to low transition (negative edge) of the clock input, DIP SOP TSSOP ORDER CODES PACKAGE TUBE DIP SOP TSSOP M74HC393B1R M74HC393M1R T&R M74HC393RM13TR M74HC393TTR and each has an independent clear input.

Part No.	M74HC393
Datasheet	M74HC393 Download
Manufacturer	STMicroelectronics
Description	DUAL BINARY COUNTER
Buy	Stock & Price

DESCRIPTION

When CLEAR is set to low, all four bits of each counter are set to a low level. This enables count truncation and allows the implementation of divide by N counter configurations. All inputs are equipped with protection circuits against static discharge and transient excess voltage. PIN CONNECTION AND IEC LOGIC SYMBOLS July 2001 1/11 M74HC393 INPUT AND OUTPUT EQUIVALENT CIRCUIT TRUTH TABLE INPUTS CLOCK X CLEAR H L X : Don’t Care L COUNT 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 QD L QD L L L L L L L L H H H H H H H H PIN

DESCRIPTION

PIN No 1, 13 2, 12 3, 4, 5, 6 11, 10, 9, 8 7 14 SYMBOL NAME AND FUNCTION 1 CLOCK 2 CLOCK Clock Input Divide by 2 Section (HIGH to LOW Edge-Triggered) 1 CLEAR Asynchronous Master 2 CLEAR Reset Inputs 1QA to 1QD Flip Flop Outputs 2QA to 2QD Flip Flop Outputs GND Ground (0V) Vcc Positive Supply Voltage OUTPUTS QC QB LL COUNT UP NO CHANGE OUTPUTS QC QB LL LL LH LH HL HL HH HH LL LL LH LH HL HL HH HH QA L QA L H L H L H L H L H L H L H L H 2/11 LOGIC DIAG...