[ /Title
(CD74
HC451
8,
CD74
HC452
0,
CD74
HCT45
20)
/Subject CD74HC4518, CD54HC4520,
CD74HC4520, CD74HCT4520
Data sheet acquired from Harris Semiconductor
SCHS216D High-Speed CMOS Logic
Dual Synchronous Counters November 1997 -Revised October 2003 Features having interchangeable CLOCK and ENABLE lines for
incrementing on either the positive-going or the negativegoing transition of CLOCK. The counters are cleared by high
levels on the MASTER RESET lines. The counter can be
cascaded in the ripple mode by connecting Q3 to the
ENABLE input of the subsequent counter while the CLOCK
input of the latter is held low. Positive or Negative Edge Triggering Synchronous Internal Carry Propagation Fanout (Over Temperature Range)
-Standard Outputs . 10 LSTTL Loads
-Bus Driver Outputs . 15 LSTTL Loads Ordering Information Wide Operating Temperature Range . -55oC to 125oC TEMP. RANGE
(oC) PACKAGE CD54HC4520F3A -55 to 125 16 Ld CERDIP HC Types …
