hef4020b NXP Semiconductors, hef4020b Datasheet - Page 2

• Manufacturer Part Number: hef4020b
• Description: 14-stage Binary Counter
• Manufacturer: NXP Semiconductors

Philips Semiconductors
DESCRIPTION
The HEF4020B is a 14-stage binary ripple counter with a
clock input (CP), an overriding asynchronous master reset
input (MR) and twelve fully buffered outputs (O
O
transition of CP. A HIGH on MR clears all counter stages
and forces all outputs LOW, independent of the state of
CP. Each counter stage is a static toggle flip-flop. A feature
of the HEF4020B is: high speed (typ. 35 MHz at
V
January 1995
DD
13
14-stage binary counter
). The counter advances on the HIGH to LOW
= 15 V).
Fig.2 Pinning diagram.
Fig.1 Functional diagram.
0
, O
3
to
2
PINNING
FAMILY DATA, I
See Family Specifications
HEF4020BP(N):
HEF4020BD(F):
HEF4020BT(D):
( ): Package Designator North America
CP
MR
O
0
, O
3
to O
13
DD
LIMITS category MSI
clock input (HIGH to LOW edge
triggered)
master reset input (active HIGH)
parallel outputs
16-lead DIL; plastic
16-lead DIL; ceramic (cerdip)
16-lead SO; plastic
(SOT38-1)
(SOT74)
(SOT109-1)
Product specification
HEF4020B
MSI