October 1996

Revised March 1999

© 1999 Fairchild Semiconductor Corporation

DS012157.prf

www.fairchildsemi.com

74LVX163

Low Voltage Synchronous Binary Counter with

Synchronous Clear

General Description

The LVX163 is a synchronous modulo-16 binary counter.

This device is synchronously presettable for application in

programmable dividers and has two types of Count Enable

inputs plus a Terminal Count output for versatility in forming

multistage counters. The CLK input is active on the rising

edge. Both PE and MR inputs are active on low logic lev-

els. Presetting is synchronous to rising edge of the CLK

and the Clear function of the LVX163 is synchronous to the

CLK. Two enable inputs (CEP and CET) and Carry Output

are provided to enable easy cascading of counters, which

facilitates easy implementation of n-bit counters without

using external gates.

The inputs tolerate voltages up to 7V allowing the interface

of 5V systems to 3V systems.

Features

s Input voltage level translation from 5V to 3V

s Ideal for low power/low noise 3.3V applications

s Guaranteed simultaneous switching noise and dynamic

threshold performance

Ordering Code:

Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.

Logic Symbols

IEEE/IEC

Connection Diagram

Pin Descriptions

Order Number

Package Number

Package Description

74LVX163M

M16A

16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150” Narrow

74LVX163SJ

M16D

16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide

74LVX163MTC

MTC16

16-Lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153, 4.4mm Wide

Pin

Description

Names

CEP

Count Enable Parallel Input

CET

Count Enable Trickle Input

CP

Clock Pulse Input

MR

Synchronous Master Reset Input

Parallel Data Inputs

PE

Parallel Enable Inputs

Flip-Flop Outputs

TC

Terminal Count Output