This is information on a product in full production.
September 2013 DocID008216 Rev 3 1/13
HCF4021
Asynchronous parallel input or synchronous serial-in/serial-out
8-stage static shift register
Datasheet - production data
Features
Medium speed operation: 12 MHz (typ.) clock
rate at V
DD
- V
SS
= 10 V
Fully static operation
8 master-slave flip-flops plus output buffering
and control gating
Quiescent current specified up to 20 V
5 V, 10 V, and 15 V parametric ratings
Input leakage current I
I
= 100 nA (max.) at
V
DD
= 18 V, T
A
= 25 C
100% tested for quiescent current
ESD performance
– CDM: 1 kV
– HBM: 2 kV
– MM: 200 V
Applications
Automotive
Industrial
Computer
Consumer
Description
The HCF4021 is a monolithic integrated circuit
fabricated in metal oxide semiconductor
technology available in PDIP-16 and SO-16
packages.
This device is an 8-stage parallel or serial-
input/serial-output register having common clock
and parallel/serial control inputs, a single serial
data input, and individual parallel "jam" inputs to
each register stage. Each register stage is a D-
type, master-slave flip-flop in addition to an output
from stage 8. "Q" outputs are also available from
stages 6 and 7. Serial entry is synchronous with
the clock but parallel entry is asynchronous.
In this device, entry is controlled by the
parallel/serial control input. When the
parallel/serial control input is low, data are serially
shifted into the 8-stage register synchronously
with the positive transition of the clock line. When
the parallel/serial control input is high, data are
jammed into the 8-stage register via the parallel
input lines and synchronous with the positive
transition of the clock line. The clock input of the
internal stage is “forced” when asynchronous
parallel entry is made. Register expansion using
multiple packages is permitted.
PDIP-16 SO-16
Table 1. Device summary
Order code Temperature range Package Packing Marking
HCF4021M013TR -55 ° C to +125 ° C SO-16
Tape & reel
HCF4021
HCF4021YM013TR
(1)
1. Qualification and characterization according to AEC Q100 and Q003 or equivalent, advanced screening according to AEC
Q001 & Q002 or equivalent.
-40 ° C to +125 ° C
SO-16
(automotive grade)
(1)
HCF4021Y
HCF4021BEY -55 ° C to +125 ° C PDIP-16 Tube HCF4021BE
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