MC74F568 查看數據表（PDF） - Motorola => Freescale

零件编号

产品描述 (功能)

比赛名单

MC74F568

4-BIT BIDIRECTIONAL COUNTERS (WITH 3-STATE OUTPUTS) FAST SCHOTTKY TTL

Motorola => Freescale 

4-BIT BIDIRECTIONAL COUNTERS

(WITH 3-STATE OUTPUTS)

The MC54/ 74F568 and MC54/74F569 are fully synchronous, reversible

counters with 3-state outputs. The F568 is a BCD decade counter; the F569

is a binary counter. They feature preset capability for programmable opera-

tion, carry lookahead for easy cascading, and a U/D input to control the direc-

tion of counting. For maximum flexibility there are both synchronous and mas-

ter asynchronous reset inputs as well as both Clocked Carry (CC) and

Terminal Count (TC) outputs. All state changes except Master Reset are initi-

ated by the rising edge of the clock. A HIGH signal on the Output Enable (OE)

input forces the output buffers into the high impedance state but does not pre-

vent counting, resetting or parallel loading.

• 4-Bit Bidirectional Counting

F568 Decade Counter

F569 Binary Counter

• Synchronous Counting and Loading

• Lookahead Carry Capability for Easy Cascading

• Preset Capability for Programmable Operation

• 3-State Outputs for Bus Organized Systems

• Master Reset (MR) Overrides All Other Inputs

• Synchronous Reset (SR) Overrides Counting and Parallel Loading

CONNECTION DIAGRAM

VCC TC CC OE O0 O1 O2 O3 CET PE

20 19 18 17 16 15 14 13 12 11

1 2 3 4 5 6 7 8 9 10

U/D CP P0 P1 P2 P3 CEP MR SR GND

MC54/74F568

MC54/74F569

4-BIT

BIDIRECTIONAL

COUNTERS

(WITH 3-STATE OUTPUTS)

FAST™ SCHOTTKY TTL

20

1

20

1

20

1

J SUFFIX

CERAMIC

CASE 732-03

N SUFFIX

PLASTIC

CASE 738-03

DW SUFFIX

SOIC

CASE 751D-03

ORDERING INFORMATION

MC54FXXXJ Ceramic

MC74FXXXN Plastic

MC74FXXXDW SOIC

LOGIC SYMBOL

11 3 4 5 6

PE P0 P1 P2 P3

1

U/D

7

CEP

12

CET

2

CP

CC

18

TC

19

17

OE

MR SR O0 O1 O2 O3

8 9 16 15 14 13

FAST AND LS TTL DATA

4-220

Share Link: