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Part: 5962-87533013A
Category:
Logic
-> Encoders/Multiplexers
-> Multiplexers
Description: ti SN54ALS857, Hex 2-To-1 Universal Multiplexers With 3-State Outputs
Company: Texas Instruments, Inc.
Datasheet: Download 5962-87533013A datasheet File size : 231 kB
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Datasheet text preview:
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
SN54ALS857 . . . JT PACKAGE SN74ALS857 . . . DW OR NT PACKAGE (TOP VIEW)
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:
S0 1A 1B 1Y 2A 2B 2Y 3A 3B 3Y OPER = 0 GND
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
VCC S1 6A 6B 6Y 5A 5B 5Y 4A 4B 4Y COMP
SN54ALS857 . . . FK PACKAGE (TOP VIEW)
· · · ·
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 IOL 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.
1Y 2A 2B NC 2Y 3A 3B
1B 1A S0 NC VCC S1 6A
4 5 6 7 8 9 10 3 2 1 28 27 26 25 24 23 22 21 20 19 11 12 13 14 15 16 17 18
6B 6Y 5A NC 5B 5Y 4A
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.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3Y OPER = 0 GND NC COMP 4Y 4B
Copyright © 1995, Texas Instruments Incorporated
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SN54ALS857, SN74ALS857 HEX 2-TO-1 UNIVERSAL MULTIPLEXERS WITH 3-STATE OUTPUTS
SDAS170A DECEMBER 1982 REVISED JANUARY 1995
FUNCTION TABLE INPUTS COMP L L L L H H H H S1 L L H H L L H H S0 L H L H L H L H Y A B A·B L A B A·B Z OUTPUTS OPER = 0 H = all A inputs L H = all B inputs L Z L H = all A inputs L H = all B inputs L Z Z
logic symbol
S0 S1 COMP 1 23 13 0 1 N4 3 3 2 1A 2 0 & 1B 2A 2B 3A 3B 4A 4B 5A 5B 6A 6B 3 5 6 8 9 16 15 19 18 22 21 20 6Y 17 5Y 14 4Y 10 3Y 1 7 2Y MUX 2 4 4,5 1Y G 0 3
1 1
EN5 EN6
1
11 3 6
OPER = 0
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for the DW, JT, and NT packages.
2
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54ALS857, SN74ALS857 HEX 2-TO-1 UNIVERSAL MULTIPLEXERS WITH 3-STATE OUTPUTS
SDAS170A DECEMBER 1982 REVISED JANUARY 1995
logic diagram (positive logic)
S0 1
S1
23
COMP 1A
13 2
4 1B 3
1Y
2A 2B 3A 3B 4A 4B 5A 5B
5 6 8 9 16 15 19 18 Details of Four Identical Channels Not Shown
7 10 14 17
2Y 3Y 4Y 5Y
6A
22
20 6B 21
6Y
11
OPER = 0
Pin numbers shown are for the DW, JT, and NT packages.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
3
SN54ALS857, SN74ALS857 HEX 2-TO-1 UNIVERSAL MULTIPLEXERS WITH 3-STATE OUTPUTS
SDAS170A DECEMBER 1982 REVISED JANUARY 1995
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage, VI . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range, TA: SN54ALS857 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55°C to 125°C SN74ALS857 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN54ALS857 MIN VCC VIH VIL IOH IOL TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Operating free-air temperature 55 4.5 2 0.7 1 12 125 0 NOM 5 MAX 5.5 SN74ALS857 MIN 4.5 2 0.8 2.6 24 70 NOM 5 MAX 5.5 UNIT V V V mA mA °C
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH TEST CONDITIONS CONDITIONS VCC = 4.5 V, VCC = 4.5 V to 5.5 V, VCC = 4 5 V 4.5 VCC = 4 5 V 4.5 VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V 5 5 V, Note See Note 1 II = 18 mA IOH = 0.4 mA IOH = 1 mA IOH = 2.6 mA IOL = 12 mA IOL = 24 mA VO = 2.7 V VO = 0.4 V VI = 7 V VI = 2.7 V VI = 0.4 V VO = 2.25 V Outputs high ICC Outputs low 15 11 16 MIN SN54ALS857 TYP MAX 1.5 VCC 2 2.4 VCC 2 3.3 2.4 0.25 0.4 20 20 0.1 20 0.2 70 24 33 15 11 16 3.2 0.25 0.35 0.4 0.5 20 20 0.1 20 0.2 70 24 33 mA V µA µA mA µA mA mA V MIN SN74ALS857 TYP MAX 1.5 UNIT V
VOL IOZH IOZL II IIH IIL IO§
Outputs disabled 18 36 18 36 All typical values are at VCC = 5 V, TA = 25°C. § The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. NOTE 1: ICC is measured with all possible inputs grounded while achieving the stated output conditions.
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54ALS857, SN74ALS857 HEX 2-TO-1 UNIVERSAL MULTIPLEXERS WITH 3-STATE OUTPUTS
SDAS170A DECEMBER 1982 REVISED JANUARY 1995
switching characteristics (see Figure 1)
VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 , R2 = 500 , TA = MIN to MAX SN54ALS857 MIN A or B (COMP high) A or B (COMP low) tpd S0 or S1 COMP A or B S0 to S1 ten tdis ten tdis ten tdis ten tdis ten tdis S0 to S1 to S1 COMP S0 OPER = 0 Y Y OPER = 0 OPER = 0 OPER = 0 Y Y (inverting) Y (noninverting) 2 2 2 2 2 2 2 2 2 2 2 2 2 S1 COMP 2 2 2 MAX 35 27 37 26 45 30 38 43 37 45 29 42 28 37 43 36 SN74ALS857 MIN 4 4 7 6 5 5 7 2 8 6 6 11 6 3 9 6 MAX 25 18 33 18 37 23 35 23 24 21 20 27 25 19 25 20 ns ns ns ns ns ns
PARAMETER
FROM (INPUT)
TO (OUTPUT)
UNIT
tpd = tPLH or tPHL, ten = tPZH or tPZL, tdis = tPHZ or tPLZ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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