74C926 データシートの表示（PDF） - Fairchild Semiconductor

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74C926

4-Digit Counters with Multiplexed 7-Segment Output Drivers

Fairchild Semiconductor 

Connection Diagrams

Pin Assignments for DIP

Top View

MM74C925

Functional Description

Reset

— Asynchronous, active high

Display Select — High, displays output of counter

Low, displays output of latch

Latch Enable — High, flow through condition

Low, latch condition

Clock

—Negative edge sensitive

Logic Diagrams

Top View

MM74C926, MM74C927, MM74C928

Segment Output — Current sourcing with 40 mA @VOUT =

VCC − 1.6V (typ.) Also, sink capability = 2

LTTL loads

Digit Output — Current sourcing with 1 mA @VOUT =

1.75V. Also, sink capability = 2 LTTL loads

Carry-Out — 2 LTTL loads. See carry-out waveforms.

MM74C925

www.fairchildsemi.com

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