74HC193U 查看數據表（PDF） - Philips Electronics

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74HC193U

Presettable synchronous 4-bit binary up/down counter

Philips Electronics 

Philips Semiconductors

Presettable synchronous 4-bit binary

up/down counter

PIN DESCRIPTION

PIN NO.

SYMBOL

NAME AND FUNCTION

3, 2, 6, 7

4

5

8

11

12

13

14

15, 1, 10, 9

16

Q0 to Q3

CPD

CPU

GND

PL

TCU

TCD

MR

D0 to D3

VCC

flip-flop outputs

count down clock input(1)

count up clock input(1)

ground (0 V)

asynchronous parallel load input (active LOW)

terminal count up (carry) output (active LOW)

terminal count down (borrow) output (active LOW)

asynchronous master reset input (active HIGH)

data inputs

positive supply voltage

Note

1. LOW-to-HIGH, edge triggered

Product specification

74HC/HCT193

Fig.1 Pin configuration.

Fig.2 Logic symbol.

December 1990

Fig.3 IEC logic symbol.

4

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