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54LS90 - DECADE COUNTER

This page provides the datasheet information for the 54LS90, a member of the 54LS92 DECADE COUNTER family.

Datasheet Summary

Description

The LS90, LS92, and LS93 are 4-bit ripple type Decade, Divide-By-Twelve, and Binary Counters respectively.

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Datasheet preview – 54LS90

Datasheet Details

Part number 54LS90
Manufacturer Motorola
File Size 109.49 KB
Description DECADE COUNTER
Datasheet download datasheet 54LS90 Datasheet
Additional preview pages of the 54LS90 datasheet.

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Full PDF Text Transcription

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DECADE COUNTER; DIVIDE-BY-TWELVE COUNTER; 4-BIT BINARY COUNTER The SN54 / 74LS90, SN54 / 74LS92 and SN54 / 74LS93 are high-speed 4-bit ripple type counters partitioned into two sections. Each counter has a divide-by-two section and either a divide-by-five (LS90), divide-by-six (LS92) or divide-by-eight (LS93) section which are triggered by a HIGH-to-LOW transition on the clock inputs. Each section can be used separately or tied together (Q to CP) to form BCD, bi-quinary, modulo-12, or modulo-16 counters. All of the counters have a 2-input gated Master Reset (Clear), and the LS90 also has a 2-input gated Master Set (Preset 9). • Low Power Consumption . . . Typically 45 mW • High Count Rates . . . Typically 42 MHz • Choice of Counting Modes . . .
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