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Part: 74ALS158D
Category:
Description: 74ALS157/74ALS158; Data Selector/multiplexer
Company: Philips Semiconductors
Datasheet: Download 74ALS158D datasheet File size : 67 kB
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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 = 0°C to +70°C 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 20µA/0.1mA 20µA/0.1mA 20µA/0.1mA 0.4mA/24mA
NOTE: One (1.0) ALS unit load is defined as: 20µA 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
8531129 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 VOL VIK II IIH IIL IO ICC PARAMETER High-level output voltage TEST CONDITIONS1 CONDITIONS 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) current (total) 74ALS158 VCC = MAX 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 µA mA mA mA mA
Low-level output voltage 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 = 25°C. 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 = 0°C to +70°C 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
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