Philips Semiconductors

Product specification

74F269

8–bit bidirectional binary counter

2

1996 Jan 05

853–0056 16186

FEATURES

DESCRIPTION

The 74F269 is a fully synchronous 8-stage Up/Down Counter

featuring a preset capability for programmable operation, carry

look-ahead for easy cascading and a U/D input to control the

direction of counting. All state changes, whether in counting or

parallel loading, are initiated by the rising edge of the clock.

TYPE

TYPICAL

SUPPLY CURRENT

(TOTAL)

74F269

115MHz

95mA

PIN CONFIGURATION

24

23

22

21

20

19

18

17

16

15

14

13

12

10

11

9

8

7

6

5

4

3

2

1

U/D

CEP

CET

TC

PE

P0

P1

P2

P3

P4

P5

P6

P7

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

CP

GND

SF00834

ORDERING INFORMATION

DESCRIPTION

COMMERCIAL RANGE

PKG DWG #

24-Pin Plastic Slim DIP (300mil)

N74F269N

SOT222-1

24-Pin Plastic SOL

N74F269D

SOT137-1

24-Pin Plastic SSOP type II

N74F269DB

SOT340-1

INPUT AND OUTPUT LOADING AND FAN-OUT TABLE

PINS

DESCRIPTION

74F(U.L.)

HIGH/LOW

LOAD VALUE

HIGH/LOW

P0 - P7

Parallel Data inputs

1.0/1.0

20

µA/0.6mA

PE

Parallel Enable input (active Low)

1.0/1.0

20

µA/0.6mA

U/D

Up/Down count control input

1.0/1.0

20

µA/0.6mA

CEP

Count Enable Parallel input (active Low)

1.0/1.0

20

µA/0.6mA

CET

Count Enable Trickle input (active Low)

1.0/1.0

20

µA/0.6mA

CP

Clock input

1.0/1.0

20

µA/0.6mA

TC

Terminal Count output (active Low)

50/33

1.0mA/20mA

Q0 - Q7

Flip-flop outputs

50/33

1.0mA/20mA

NOTE:

One (1.0) FAST Unit Load is defined as: 20

µA in the High state and 0.6mA in the Low state.