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74HC158 Datasheet, PDF (1/6 Pages) NXP Semiconductors – Quad 2-input multiplexer; inverting | |||
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SEMICONDUCTOR
September 1997
CD74HC157, CD74HCT157,
CD74HC158, CD74HCT158
High Speed CMOS Logic
Quad 2-Input Multiplexers
Features
Description
⢠Common Select Inputs
⢠Separate Enable Inputs
⢠Buffered inputs and Outputs
⢠Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
⢠Wide Operating Temperature Range . . . -55oC to 125oC
⢠Balanced Propagation Delay and Transition Times
⢠Signiï¬cant Power Reduction Compared to LSTTL
Logic ICs
The Harris CD74HC157, CD74HCT157, CD74HC158 and
CD74HCT158 are quad 2-input multiplexers which select
four bits of data from two sources under the control of a
common Select input (S). The Enable input (E) is active Low.
When (E) is High, all of the outputs in the 158, the inverting
type, (1Y-4Y) are forced High and in the 157, the non-
inverting type, all of the outputs (1Y-4Y) are forced Low,
regardless of all other input conditions.
Moving data from two groups of registers to four common
output busses is a common use of these devices. The state
of the Select input determines the particular register from
which the data comes. They can also be used as function
generators.
⢠HC Types
- 2V to 6V Operation
- High Noise Immunity: NIL = 30%, NIH = 30%of VCC at
VCC = 5V
⢠HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
VIL= 0.8V (Max), VIH = 2V (Min)
- CMOS Input Compatibility, Il ⤠1µA at VOL, VOH
Ordering Information
PART NUMBER TEMP. RANGE (oC) PACKAGE
PKG.
NO.
CD74HC157E
-55 to 125
16 Ld PDIP E16.3
CD74HCT157E
-55 to 125
16 Ld PDIP E16.3
CD74HC158E
-55 to 125
16 Ld PDIP E16.3
CD74HCT158E
-55 to 125
16 Ld PDIP E16.3
Pinout
CD74HC157, CD74HCT157, CD74HC158, CD74HCT158
(PDIP, SOIC)
TOP VIEW
S1
1I0 2
1I1 3
1Y 4
2I0 5
2I1 6
2Y 7
GND 8
16 VCC
15 E
14 4I0
13 4I1
12 4Y
11 3I0
10 3I1
9 3Y
CD74HC157M
-55 to 125
16 Ld SOIC M16.15
CD74HCT157M
-55 to 125
16 Ld SOIC M16.15
CD74HC158M
-55 to 125
16 Ld SOIC M16.15
NOTES:
1. When ordering, use the entire part number. Add the sufï¬x 96 to
obtain the variant in the tape and reel.
2. Wafer or die for this part number is available which meets all elec-
trical specifications. Please contact your local sales office or
Harris customer service for ordering information.
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright © Harris Corporation 1997
1
File Number 1642.2
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