MC5474F569 Datasheet, PDF (1/6 Pages) Motorola, Inc – 4-BIT BIDIRECTIONAL COUNTERS (WITH 3-STATE OUTPUTS)

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