Document
54157 DM54157 DM74157 Quad 2-Line to 1-Line Data Selectors Multiplexers
June 1989
54157 DM54157 DM74157 Quad 2-Line to 1-Line Data Selectors Multiplexers
General Description
These data selectors multiplexers contain inverters and drivers to supply full on-chip data selection to the four output gates A separate strobe input is provided A 4-bit word is selected from one of two sources and is routed to the four outputs
Features
Y Y Y Y
Applications
Y Y Y
Buffered inputs and outputs Typical propagation time 9 ns Typical power dissipation 150 mW Alternate Military Aerospace device (54157) is available Contact a National Semiconductor Sales Office Distributor for specifications
Y
Expand any data input point Multiplex dual data buses Generate four functions of two variables (one variable is common) Source programmable counters
Connection Diagram
Dual-In-Line Package
TL F 6550 – 1
Order Number 54157DMQB 54157FMQB DM54157J DM54157W or DM74157N See NS Package Number J16A N16E or W16A
Function Table
Inputs Strobe H L L L L Select X L L H H A X L H X X B X X X L H L L H L H Output Y
H e High Level L e Low Level X e Don’t Care
C1995 National Semiconductor Corporation
TL F 6550
RRD-B30M105 Printed in U S A
Absolute Maximum Ratings (Note)
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 5 5V Operating Free Air Temperature Range b 55 C to a 125 C DM54 and 54 DM74 0 C to a 70 C Storage Temperature Range
b 65 C to a 150 C
Note The ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed The device should not be operated at these limits The parametric values defined in the ‘‘Electrical Characteristics’’ table are not guaranteed at the absolute maximum ratings The ‘‘Recommended Operating Conditions’’ table will define the conditions for actual device operation
Recommended Operating Conditions
Symbol VCC VIH VIL IOH IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current Low Level Output Current Free Air Operating Temperature
b 55
DM54157 Nom 5 Max 55 08
b0 8
DM74157 Min 4 75 2 08
b0 8
Units Max 5 25 V V V mA mA C
Nom 5
45 2
16 125 0
16 70
Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)
Symbol VI VOH VOL II IIH IIL IOS ICC Parameter Input Clamp Voltage High Level Output Voltage Low Level Output Voltage Input Current Input Voltage Max Conditions VCC e Min II e b12 mA VCC e Min IOH e Max VIL e Max VIH e Min VCC e Min IOL e Max VIH e Min VIL e Max VCC e Max VI e 5 5V VCC e Max VI e 2 4V VCC e Max VI e 0 4V VCC e Max (Note 2) DM54 DM74
b 20 b 18
Min
Typ (Note 1)
Max
b1 5
Units V V
24
34 04 1 40
b1 6 b 55 b 55
V mA mA mA mA mA
High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current
VCC e Max (Note 3)
30
.