74LS191 View Datasheet(PDF) - Motorola => Freescale

Part Name

Description

MFG CO.

74LS191

PRESETTABLE BCD/DECADE PRESETTABLE 4-BIT BINARY UP/DOWN COUNTERS

Motorola => Freescale 

SN54/74LS190 • SN54/74LS191

LOGIC DIAGRAMS (continued)

CP U/D

14

5

P0

15

CE

4

P1

1

P2

10

P3

9

PL

11

13

12

RC

TC

VCC = PIN 16

GND = PIN 8

= PIN NUMBERS

J CLOCK K

PRESET CLEAR

Q

Q

3

Q0

J CLOCK K

PRESET CLEAR

Q

Q

2

Q1

J CLOCK K

PRESET CLEAR

Q

Q

6

Q2

BINARY COUNTER

LS191

J CLOCK K

PRESET CLEAR

Q

Q

7

Q3

FAST AND LS TTL DATA

5-343

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