74F269 8-Bit Bidirectional Binary Counter
April 1988
Revised September 2000
74F269
8-Bit Bidirectional Binary Counter
General Description
The 74F269 is a fully synchronous 8-stage up/down
counter featuring a preset capability for programmable
operation, carry lookahead 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.
Features
s
Synchronous counting and loading
s
Built-in lookahead carry capability
s
Count frequency 100 MHz
s
Supply current 113 mA typ
s
300 mil slimline package
Ordering Code:
Order Number
74F269SC
74F269SPC
Package Number
M24B
N24C
Package Description
24-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
24-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide
Devices also available in Tape and Reel. Specify by appending the suffix letter 鈥淴鈥?to the ordering code.
Logic Symbols
Connection Diagram
IEEE/IEC
Function Table
PE
L
CEP
X
CET
X
U/D
X
CP
H
H
H
H
H
X
L
L
X
H
L
L
X
X
H
L
H
=
HIGH Voltage Level
L
=
LOW Voltage Level
X
=
Immaterial
=
Transition LOW-to-HIGH
Function
Parallel Load All
Flip-Flops
Hold
Hold (TC Held HIGH)
Count Up
Count Down
漏 2000 Fairchild Semiconductor Corporation
DS009510
www.fairchildsemi.com
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