© 1999 Fairchild Semiconductor Corporation DS009565 www.fairchildsemi.com
April 1988
Revised August 1999
7
4F569 4-Bi
t Bidi
rect
iona
l Counter

wi
th 3-ST
A
T
E
Out
puts
74F569
4-Bit Bidirectional Counter with 3-STATE Outputs
General Description
The 74F569 is a fully synchronous, reversible counter with
3-STATE outputs. The 74F569 is a binary counter, featur-
ing preset capability for programmable operation, carry loo-
kahead for easy cascading, and a U/D input to control the
direction of counting. For maximum flexibility there are both
synchronous and master asynchronous reset inputs as well
as both Clocked Carry (CC) and Terminal Count (TC) out-
puts. All state changes except Master Reset are initiated 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 prevent counting, resetting
or parallel loading.
Features
a73 Synchronous counting and loading
a73 Lookahead carry capability for easy cascading
a73 Preset capability for programmable operation
a73 3-STATE outputs for bus organized systems

Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Logic Symbols
IEEE/IEC
Connection Diagram
FAST is a registered trademark of Fairchild Semiconductor Corporation.
Order Number Package Number Package Description
74F569SC M20B 20-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300 Wide
74F569SJ M20D 20-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide
74F569PC N20A 20-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide