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CD4021BCMX

P1-P3P4-P6P7-P7
© 2002 Fairchild Semiconductor Corporation DS005954 www.fairchildsemi.com
October 1987
Revised March 2002
CD4021BC 8-Stage Static Shift Register
CD4021BC
8-Stage Static Shift Register
General Description
The CD4021BC is an 8-stage parallel input/serial output
shift register. A parallel/serial control input enables individ-
ual JAM inputs to each of 8 stages. Q outputs are available
from the sixth, seventh, and eighth stages. All outputs have
equal source and sink current capabilities and conform to
standard “B” series output drive.
When the parallel/serial control input is in the logical “0”
state, data is serially shifted into the register synchronously
with the positive transition of the clock. When the parallel/
serial control is in the logical “1” state, data is jammed into
each stage of the register asynchronously with the clock.
All inputs are protected against static discharge with diodes
to V
DD
and V
SS
.
Features
■ Wide supply voltage range: 3.0V to 15V
■ High noise immunity: 0.45 V
DD
(typ.)
■ Low power TTL compatibility:
Fan out of 2 driving 74L or 1 driving 74LS
■ 5V–10V–15V parametric ratings
■ Symmetrical output characteristics
■ Maximum input leakage 1
µA at 15V over full tempera-
ture range
Ordering Code:
Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code.
Connection Diagram
Top View
Truth Table
X = Don't care case
Note 1: Level change
Note 2: No change
Order Number Order Code Package Description
CD4021BCM M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150" Narrow
CD4021BCN N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide
C
L
(Note 1)
Serial
Input
Parallel/
Serial
Control
PI 1 PI n
Q1
(Internal)
Q
n
(Note 2)
XX1000 0
XX1010 1
XX1101 0
XX1111 1
00XX0Q
n−1
10XX1Q
n−1
X0XXQ1Q
n
www.fairchildsemi.com 2
CD4021BC
Logic Diagram
3 www.fairchildsemi.com
CD4021BC
Absolute Maximum Ratings(Note 3)
(Note 4)
Recommended Operating
Conditions
(Note 4)
Note 3: “Absolute Maximum Ratings” are those values beyond which the
safety of the device cannot be guaranteed. Except for “Operating Tempera-
ture Range” they are not meant to imply that the devices should be oper-
ated at these limits. The table of “Electrical Characteristics” provides
conditions for actual device operation.
Note 4: V
SS
= 0V unless otherwise specified.
DC Electrical Characteristics (Note 4)
Note 5: I
OH
and I
OL
are tested one output at a time.
Supply Voltage (V
DD
) −0.5V to +18V
Input Voltage (V
IN
) −0.5V to V
DD
+0.5V
Storage Temperature Range (T
S
) −65°C to +150°C
Power Dissipation (P
D
)
Dual-In-Line 700 mW
Small Outline 500 mW
Lead Temperature (T
L
)
(Soldering, 10 seconds) 260
°C
Supply Voltage (V
DD
) 3V to 15V
Input Voltage (V
IN
) 0 to V
DD
Operating Temperature Range (T
A
)
CD4021BCN
−55°C to +125°C
Symbol Parameter Conditions
−55°C +25°C +125°C
Units
Min Max Min Typ Max Min Max
I
DD
Quiescent Device V
DD
= 5V, V
IN
= V
DD
or V
SS
50.15 150
µACurrent V
DD
= 10V, V
IN
= V
DD
or V
SS
10 0.2 10 300
V
DD
= 15V, V
IN
= V
DD
or V
SS
20 0.3 20 600
V
OL
LOW Level V
DD
= 5V 0.05 0 0.05 0.05
VOutput Voltage V
DD
= 10V |I
O
| < 1 µA 0.05 0 0.05 0.05
V
DD
= 15V 0.05 0 0.05 0.05
V
OH
HIGH Level V
DD
= 5V 4.95 4.95 5 4.95
VOutput Voltage V
DD
= 10V |I
O
|< 1 µA 9.95 9.95 10 9.95
V
DD
= 15V 14.95 14.95 15 14.95
V
IL
LOW Level V
DD
= 5V, V
O
= 0.5V or 4.5V 1.5 2 1.5 1.5
VInput Voltage V
DD
= 10V, V
O
= 1.0V or 9.0V 3.0 4 3.0 3.0
V
DD
= 15V, V
O
= 1.5V or 13.5V 4.0 6 4.0 4.0
V
IH
HIGH Level V
DD
= 5V, V
O
= 0.5V or 4.5V 3.5 3.5 3 3.5
VInput Voltage V
DD
= 10V, V
O
= 1.0V or 9.0V 7.0 7.0 6 7.0
V
DD
= 15V, V
O
= 1.5V or 13.5V 11.0 11.0 9 11.0
I
OL
LOW Level Output V
DD
= 5V, V
O
= 0.4V 0.64 0.51 0.88 0.36
mACurrent (Note 5) V
DD
= 10V, V
O
= 0.5V 1.6 1.3 2.2 0.90
V
DD
= 15V, V
O
= 1.5V 4.2 3.4 8 2.4
I
OH
HIGH Level Output V
DD
= 5V, V
O
= 4.6V −0.64 −0.51 −0.88 −0.36
mACurrent (Note 5) V
DD
= 10V, V
O
= 9.5V −1.6 −1.3 −2.2 −0.90
V
DD
= 15V, V
O
= 13.5V −4.2 −3.4 −8 −2.4
I
IN
Input Current V
DD
= 15V, V
IN
= 0V −0.1 −10
−5
−0.1 −1.0
µA
V
DD
= 15V, V
IN
= 15V 0.1 10
−5
0.1 1.0
P1-P3P4-P6P7-P7

CD4021BCMX

Mfr. #:
Buy CD4021BCMX
Manufacturer:
ON Semiconductor / Fairchild
Description:
Counter Shift Registers 8-Stage Shift Reg
Lifecycle:
New from this manufacturer.
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