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CD4042BM Schematic ( PDF Datasheet ) - National Semiconductor

Teilenummer CD4042BM
Beschreibung Quad Clocked D Latch
Hersteller National Semiconductor
Logo National Semiconductor Logo 




Gesamt 6 Seiten
CD4042BM Datasheet, Funktion
March 1988
CD4042BM CD4042BC Quad Clocked D Latch
General Description
The CD4042BM CD4042BC quad clocked ‘‘D’’ latch is a
monolithic complementary MOS (CMOS) integrated circuit
constructed with P- and N-channel enhancement mode
transistors The outputs Q and Q either latch or follow the
data input depending on the clock level which is pro-
grammed by the polarity input For polarity e 0 the informa-
tion present at the data input is transferred to Q and Q
during 0 clock level and for polarity e 1 the transfer occurs
during the 1 clock level When a clock transition occurs
(positive for polarity e 0 and negative for polarity e 1) the
information present at the input during the clock transition is
retained at the outputs until an opposite clock transition oc-
curs
Features
Y Wide supply voltage range
Y High noise immunity
Y Low power TTL
compatibility
Y Clock polarity control
Y Fully buffered data inputs
Y Q and Q outputs
3 0V to 15V
0 45 VDD (typ )
Fan out of 2 driving 74L
or 1 driving 74LS
Connection Diagram
Dual-In-Line Package
Truth Table
Clock
0
L
1
K
Polarity
0
0
1
1
Q
D
Latch
D
Latch
Order Number CD4042B
Top View
Logic Diagrams
TL F 5966 – 1
TL F 5966 – 2
C1995 National Semiconductor Corporation TL F 5966
TL F 5966 – 4
TL F 5966 – 3
RRD-B30M105 Printed in U S A






CD4042BM Datasheet, Funktion
Physical Dimensions inches (millimeters)
Ceramic Dual-In-Line Package (J)
Order Number CD4042BMJ or CD4042BCJ
NS Package Number J16A
Molded Dual-In-Line Package (N)
Order Number CD4042BMN or CD4042BCN
NS Package Number N16E
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION As used herein
1 Life support devices or systems are devices or
systems which (a) are intended for surgical implant
into the body or (b) support or sustain life and whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling can
be reasonably expected to result in a significant injury
to the user
2 A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system or to affect its safety or
effectiveness
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