SN54390, SN54LS390, SN54393, SN54LS393, SN74390, SN74LS390,SN74393, SN74LS393 DUAL 4-BIT DECADE AND BINARY COUNTERS

SDLS107 - OCTOBER 1976 - REVISED MARCH 1988

PRODUCTION DATA documents contain information current as of publicationdate. Products conform to specifications per the terms of Texas Instrumentsstandard warranty. Production processing does not necessarily include testingof all parameters.

features

Dual Versions of the Popular '90A, 'LS90 and '93A, 'LS93
'390, 'LS390 … Individual Clocks for A and B Flip-Flops ProvideDual ÷ 2 and ÷ 5 Counters
'393, 'LS393 … Dual 4-Bit Binary Counter with Individual Clocks
All Have Direct Clear for Each 4-Bit Counter
Dual 4-Bit Versions Can Significantly Improve System Densities by ReducingCounter Package Count by 50%
Typical Maximum Count Frequency … 35 MHz
Buffered Outputs Reduce Possibility of Collector Commutation

description

Each of these monolithic circuits contains eight master-slave flip-flopsand additional gating to implement two individual four-bit counters in a singlepackage. The '390 and 'LS390 incorporate dual divide-by-two and divide-by-fivecounters, which can be used to implement cycle lengths equal to any wholeand/or cumulative multiples of 2 and/or 5 up to divide-by-100. When connectedas a bi-quinary counter, the separate divide-by-two circuit can be used toprovide symmetry (a square wave) at the final output stage. The '393 and 'LS393each comprise two independent four-bit binary counters each having a clearand a clock input. N-bit binary counters can be implemented with each packageproviding the capability of divide-by-256. The '390, 'LS390, '393, and 'LS393have parallel outputs from each counter stage so that any submultiple of theinput count frequency is available for system-timing signals. Series 54 andSeries 54LS circuits are characterized for operation over the full militarytemperature range of -55°C to 125°C; Series 74 and Series 74LS circuitsare characterized for operation from 0°C to 70°C.

Title: DUAL 4-BIT DECADE AND BINARY COUNTERS
Product Family: BINARY
Device Functionality: DECADE/BINARY
Orderable Devices: SN54393J, SNJ54393J, SNJ54393W, JM38510/32701B2A, JM38510/32701BEA, SN54LS390J, SNJ54LS390FK, SNJ54LS390J, SNJ54LS390W, JM38510/32702B2A, JM38510/32702BCA, JM38510/32702BDA, SN54LS393J, SNJ54LS393FK, SNJ54LS393J, SNJ54LS393W, SN74390N, SN74393N, SN74393N3, SN74LS390D, SN74LS390DR, SN74LS390N, SN74LS390N3, SN74LS393D, SN74LS393DR, SN74LS393J, SN74LS393N, SN74LS393N3

View the complete PDF datasheet: sdls107.pdf (407 K Bytes) (Requires Acrobat Reader 3.x)

View more information about generic part numbers:SN54393, SN54LS390, SN54LS393, SN74390, SN74393, SN74LS390, SN74LS393

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