SN54ALS857 Datasheet, PDF (1/11 Pages) Texas Instruments – HEX 2-TO-1 UNIVERSAL MULTIPLEXERS WITH 3-STATE OUTPUTS

SN54ALS857, SN74ALS857
HEX 2-TO-1 UNIVERSAL MULTIPLEXERS
WITH 3-STATE OUTPUTS
SDAS170A – DECEMBER 1982 – REVISED JANUARY 1995
• Select True or Complementary Data
• Perform AND/NAND (Masking) of
A or B Operand
• Cascadable to Expand Number of
Operands
• Detect Zeros on A or B Operands
• 3-State Outputs Interface Directly With
System Bus
• Package Options Include Plastic
Small-Outline (DW) Packages, Ceramic
Chip Carriers (FK), and Standard Plastic
(NT) and Ceramic (JT) 300-mil DIPs
description
The ′ALS857 are hextuple 2-line to 1-line
multiplexers with 3-state outputs. The devices can
provide either true (COMP low) or inverted
(COMP high) data at the Y outputs. In addition, the
′ALS857 perform the logical AND function (A • B)
and the clear function as well. The four modes of
operation are:
• Select A-data inputs
• Select B-data inputs
• AND A inputs with B inputs
• Clear
In either of the first two modes, OPER = 0 is high
if all the selected A or B inputs are low. The six Y
outputs and the OPER = 0 output are all 3-state
and rated at 12-mA and 24-mA I_OL for the
SN54ALS857 and SN74ALS857, respectively. All
outputs can be placed in the high-impedance state
by applying a high level to the COMP, S0, and S1
inputs simultaneously.
SN54ALS857 . . . JT PACKAGE
SN74ALS857 . . . DW OR NT PACKAGE
(TOP VIEW)
S0 1
1A 2
1B 3
1Y 4
2A 5
2B 6
2Y 7
3A 8
3B 9
3Y 10
OPER = 0 11
GND 12
24 V_CC
23 S1
22 6A
21 6B
20 6Y
19 5A
18 5B
17 5Y
16 4A
15 4B
14 4Y
13 COMP
SN54ALS857 . . . FK PACKAGE
(TOP VIEW)
4 3 2 1 28 27 26
1Y 5
25 6B
2A 6
24 6Y
2B 7
23 5A
NC 8
22 NC
2Y ₉
21 5B
3A ₁₀
20 5Y
3B ₁₁
19 4A
12 13 14 15 16 17 18
NC – No internal connection
The SN54ALS857 is characterized for operation over the full military temperature range of – 55°C to 125°C. The
SN74ALS857 is characterized for operation from 0°C to 70°C.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
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Copyright © 1995, Texas Instruments Incorporated
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