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INTEGRATED CIRCUITS
74ALS157/74ALS158 Data selector/multiplexer
Product specification IC05 Data Handbook 1991 Feb 08
Philips Semiconductors
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS157 Quad 2-input data selector/multiplexer, non-inverting 74ALS158 Quad 2-input data selector/multiplexer, inverting
DESCRIPTION
The 74ALS157 is a quad 2-input multiplexer which selects 4 bits of data from one of two sources under the control of a common select input (S). The enable input (E) is active when Low. When E is High, all of the outputs (Yn) are forced Low regardless of all other input conditions. Moving data from two registers to a common output bus is a typical use of the 74ALS157. The state of the select input determines the particular register from which data comes. The device is the logic implementation of 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the select input. The 74ALS158 is similar but has inverting outputs (Yn). TYPE 74ALS157 74ALS158
74ALS157/74ALS158
TYPICAL PROPAGATION DELAY 6.0ns 6.0ns
TYPICAL SUPPLY CURRENT (TOTAL) 6mA 6mA
ORDERING INFORMATION
ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C 74ALS157N, 74ALS158N 74ALS157D, 74ALS158D DRAWING NUMBER
16-pin plastic DIP 16-pin plastic SO
SOT38-4 SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS Ina, Inb, Inc, Ind S E Ya - Yd, Ya - Yd Data inputs Select input Enable input Data outputs DESCRIPTION 74ALS (U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 1.0/1.0 20/240 LOAD VALUE HIGH/LOW 20A/0.1mA 20A/0.1mA 20A/0.1mA 0.4mA/24mA
NOTE: One (1.0) ALS unit load is defined as: 20A in the High state and 0.1mA in the Low state.
PIN CONFIGURATION - 74ALS157
S I0a I1a Ya I0b I1b Yb GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC E I0d I1d Yd I0c I1c Yc
PIN CONFIGURATION - 74ALS158
S I0a I1a Ya I0b I1b Yb GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC E I0d I1d Yd I0c I1c Yc
SC00051
SC00052
LOGIC SYMBOL - 74ALS157
2 3 5 6 11 10 14 13
LOGIC SYMBOL - 74ALS158
2 3 5 6 11 10 14 13
I0a I1a I0b 1 15 S E Ya
I1b
I0c
I1c
I0d I1d 1 15 S E
I0a I1a I0b
I1b
I0c
I1c
I0d I1d
Yb
Yc
Yd
Ya
Yb
Yc
Yd
VCC = Pin 16 GND = Pin 8
4
7
9
12
SC00053
VCC = Pin 16 GND = Pin 8
4
7
9
12
SC00054
1991 Feb 08
2
853-1129 01670
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS157/74ALS158
IEC/IEEE SYMBOL - 74ALS157
1 15 G1 EN
IEC/IEEE SYMBOL - 74ALS158
1 15 G1 EN
2 3 5 6 11 10 14 13
1 1
MUX 4
2 3
1 1
MUX 4
7
5 6
7
9
11 10
9
12
14 13
12
SC00055
SC00056
LOGIC DIAGRAM - 74ALS157
E 15 I0a 2 I1a 3 I0b 5 I1b 6 I0c 11 I1c I0d 10 14 I0d 13 S 1
LOGIC DIAGRAM - 74ALS158
E 15 I0a 2 I1a 3 I0b 5 I1b 6 I0c 11 I1c I0d 10 14 I0d 13 S 1
4 Ya VCC = Pin 16 GND = Pin 8
7 Yb
9 Yc Yd
12
4 Ya VCC = Pin 16 GND = Pin 8
7 Yb
9 Yc Yd
12
SC00057
SC00058
FUNCTION TABLE - 74ALS157
INPUTS E H L L L L S X L L H H I0n X L H X X I1n X X X L H OUTPUTS Yn L L H L H
FUNCTION TABLE - 74ALS158
INPUTS E H L L L L S X L L H H I0n X L H X X I1n X X X L H OUTPUTS Yn H H L H L
H = High voltage level L = Low voltage level X = Don't care
H = High voltage level L = Low voltage level X = Don't care
1991 Feb 08
3
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS157/74ALS158
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device. Unless otherwise noted these limits are over the operating free-air temperature range.) SYMBOL VCC VIN IIN VOUT IOUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state Current applied to output in Low output state Operating free-air temperature range Storage temperature range PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to VCC 16 0 to +70 -65 to +150 UNIT V V mA V mA C C
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC VIH VIL IIk IOH IOL Tamb Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current Operating free-air temperature range 0 PARAMETER MIN 4.5 2.0 0.8 -18 -0.4 8 +70 NOM 5.0 MAX 5.5 V V V mA mA mA C UNIT
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL VOH VO OL VIK II IIH IIL IO ICC PARAMETER High-level output voltage TEST CONDITIONS1 MIN VCC = 10%, VIL = MAX, VIH = MIN VCC = MIN, VIL = MAX, , , VIH = MIN VCC = MIN, II = IIK VCC = MAX, VI = 7.0V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.4V VCC = MAX, VO = 2.25V 74ALS157 Supply current (total) 74ALS158 VCC = MAX -30 6 6 IOH = MAX IOL = 4mA IOL = 8mA VCC - 2 0.25 0.35 -0.73 0.40 0.50 -1.5 0.1 20 -0.1 -112 11 10 LIMITS TYP2 UNIT MAX V V V V mA A mA mA mA mA
Low-level Low level output voltage Input clamp voltage Input current at minimum input voltage High-level input current Low-level input current Output current3
NOTES: 1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type. 2. All typical values are at VCC = 5V, Tamb = 25C. 3. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
1991 Feb 08
4
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS157/74ALS158
AC ELECTRICAL CHARACTERISTICS
LIMITS SYMBOL PARAMETER TEST CONDITION Tamb = 0C to +70C VCC = +5.0V 10% CL = 50pF, RL = 500 MIN tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL tPLH tPHL Propagation delay I0n or I1n to Yn Propagation delay S to Yn Propagation delay E to Yn Propagation delay I0n or I1n to Yn Propagation delay S to Yn Propagation delay E to Yn 74ALS158 74ALS157 Waveform 1 Waveform 1, 3 Waveform 3 Waveform 2 Waveform 2, 4 Waveform 4 2.0 2.0 4.0 4.0 4.0 7.0 2.0 2.0 4.0 4.0 4.0 4.0 MAX 9.0 9.0 12.0 12.0 11.0 14.0 8.0 8.0 12.0 12.0 14.0 14.0 ns ns ns ns ns ns UNIT
AC WAVEFORMS
For all waveforms, VM = 1.3V.
I0n, I1n, S
VM tPLH
VM tPHL VM VM
I0n, I1n, S
VM tPHL
VM tPLH VM VM
Yn, Yn
Yn, Yn
SC00059
SC00060
Waveform 1. Propagation Delay for Data and Select to Output
Waveform 2. Propagation Delay for Data and Select to Output
E, S
VM tPLH
VM tPHL VM VM
E, S
VM tPHL
VM tPLH VM VM
Yn, Yn
Yn, Yn
SC00061
SC00062
Waveform 3. Propagation Delay for Enable and Select to Output
Waveform 4. Propagation Delay for Enable and Select to Output
1991 Feb 08
5
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS157/74ALS158
TEST CIRCUIT AND WAVEFORMS
VCC NEGATIVE PULSE VIN PULSE GENERATOR RT D.U.T. VOUT 90% VM 10% tTHL (tff) CL RL tw VM 10% tTLH (tr ) 0.3V 90% AMP (V)
tTLH (tr ) 90%
tTHL (tf ) AMP (V) 90% VM tw 10% 0.3V
Test Circuit for Totem-pole Outputs
POSITIVE PULSE 10%
VM
DEFINITIONS: RL = Load resistor; see AC electrical characteristics for value. CL = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value. RT = Termination resistance should be equal to ZOUT of pulse generators.
Input Pulse Definition INPUT PULSE REQUIREMENTS Family Amplitude VM 74ALS 3.5V 1.3V Rep.Rate 1MHz tw 500ns tTLH 2.0ns tTHL 2.0ns
SC00005
1991 Feb 08
6
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS157/74ALS158
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
1991 Feb 08
7
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS157/74ALS158
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1991 Feb 08
8
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS157/74ALS158
DEFINITIONS
Data Sheet Identification
Objective Specification
Product Status
Formative or in Design
Definition
This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips Semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product.
Preliminary Specification
Preproduction Product
Product Specification
Full Production
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. LIFE SUPPORT APPLICATIONS Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices, or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1997 All rights reserved. Printed in U.S.A.
Philips Semiconductors
1991 Feb 08 9

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