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INTEGRATED CIRCUITS
74ALS257/74ALS258 Data selector/multiplexer
Product specification IC05 Data Handbook 1991 Feb 08
Philips Semiconductors
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257 Quad 2-input data selector, non-inverting (3-State) 74ALS258 Quad 2-input data selector, inverting (3-State)
DESCRIPTION
The 74ALS257 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 output enable input (OE) is active when Low. When OE is High, all of the outputs (Yn) are forced to a High impedance state (3-State) regardless of all other input conditions. Moving data from two registers to a common output bus is a typical use of the 74ALS257. 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 74ALS258 is similar but has inverting outputs (Yn). TYPE 74ALS257 74ALS258
74ALS257/74ALS258
TYPICAL PROPAGATION DELAY 7.0ns 7.0ns
TYPICAL SUPPLY CURRENT (TOTAL) 7mA 7mA
ORDERING INFORMATION
ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C 74ALS257N, 74ALS258 74ALS257D, 74ALS258D 74ALS257DB, 74ALS258DB DRAWING NUMBER SOT38-4 SOT109-1 SOT338-1
16-pin plastic DIP 16-pin plastic SO 16-pin plastic SSOP Type II
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS Ina, Inb, Inc, Ind S OE 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 - 74ALS257
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 OE I0d I1d Yd I0c I1c Yc
PIN CONFIGURATION - 74ALS258
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 OE I0d I1d Yd I0c I1c Yc
SF00673
SC00079
1991 Feb 08
2
853-1130 01670
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
LOGIC SYMBOL - 74ALS257
LOGIC SYMBOL - 74ALS258
2
3
5
6
11
10
14
13
2
3
5
6
11
10
14
13
I0a I1a I0b 1 15 S OE Ya
I1b
I0c
I1c
I0d I1d 1 15 S OE
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
SF00674
VCC = Pin 16 GND = Pin 8
4
7
9
12
SC00080
IEC/IEEE SYMBOL - 74ALS257
15 1 EN G1
IEC/IEEE SYMBOL - 74ALS258
15 1 EN G1
2 3 5 6 10
1 1
MUX 4
2 3 7 5 6 10 9
1 1
MUX 4
7
9 11 13 14
11 13 14 12
12
SF00675
SC00081
LOGIC DIAGRAM - 74ALS257
OE I0a 15 2 I1a 3 I0b 5 I1b 6 I0c 11 I1c 10 I0d 14 I1d S 13 1
LOGIC DIAGRAM - 74ALS258
OE I0a 15 2 I1a 3 I0b 5 I1b 6 I0c 11 I1c 10 I0d 14 I1d S 13 1
4 VCC = Pin 16 GND = Pin 8 Ya Yb
7
9 Yc Yd
12
4
7 Yb
9 Yc Yd
12
SC00082
VCC = Pin 16 GND = Pin 8
Ya
SC00083
1991 Feb 08
3
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
FUNCTION TABLE - 74ALS257
INPUTS OE H L L L L H L X Z = = = = S X L L H H I0n X L H X X I1n X X X L H OUTPUT Yn Z L H L H
FUNCTION TABLE - 74ALS258
INPUTS OE H L L L L H L X Z = = = = S X L L H H I0n X L H X X I1n X X X L H OUTPUT Yn Z H L H L
High voltage level Low voltage level Don't care High impedance "off" state
High voltage level Low voltage level Don't care High impedance "off" state
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 48 0 to +70 -65 to +150 UNIT V V mA V mA C C
RECOMMENDED OPERATING CONDITIONS
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 LIMITS MIN 4.5 2.0 0.8 -18 -2.6 24 +70 NOM 5.0 MAX 5.5 UNIT V V V mA mA mA C
1991 Feb 08
4
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL VO OH VO OL VIK II IIH IIL IOZH IOZL IO PARAMETER High-level High level output voltage Low level output voltage Low-level Input clamp voltage Input current at maximum input voltage High-level input current Low-level input current Off-state output current, High-level voltage applied Off-state output current, Low-level voltage applied Output current3 ICCH 74ALS257 ICC Supply current (total) 74ALS258 ICCL ICCZ ICCH ICCL ICCZ VCC = MAX VCC = MAX TEST CONDITIONS1 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, VI = 2.7V VCC = MAX, VI = 0.4V VCC = MAX, VO = 2.25V -30 3 8 9 2.5 7 9 IOH = -0.4mA IOH = MAX IOL = 12mA IOL = 24mA LIMITS MIN VCC - 2 2.4 3.2 0.25 0.35 -0.73 0.40 0.50 -1.5 0.1 20 -0.1 20 -20 -112 6 12 14 4 11 13 TYP2 MAX UNIT V V V V V mA A mA A A mA mA mA mA mA mA mA
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
5
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
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 tPZH tPZL tPHZ tPLZ tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay I0n or I1n to Yn Propagation delay S to Yn Output enable time OE to Yn Output disable time OE to Yn Propagation delay I0n or I1n to Yn Propagation delay S to Yn Output enable time OE to Yn Output disable time OE to Yn Waveform 1 Waveform 1, 2 74ALS257 Waveform 3 Waveform 4 Waveform 3 Waveform 4 Waveform 1 Waveform 1, 2 74ALS258 Waveform 3 Waveform 4 Waveform 3 Waveform 4 2.0 2.0 4.0 4.0 3.0 4.0 2.0 5.0 2.0 2.0 4.0 4.0 3.0 4.0 2.0 5.0 MAX 9.0 9.0 12.0 12.0 11.0 12.0 9.0 12.0 8.0 8.0 12.0 12.0 11.0 12.0 9.0 12.0 ns ns 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 Outputs
Waveform 2. Propagation Delay for Data and Select to Outputs
OE
VM tPZH
VM tPHZ VM 0V VOH -0.3V
OEn
VM
VM
tPZL Yn, Yn VM
tPLZ 3.5V
Yn, Yn
VOL +0.3V
SC00084
SC00085
Waveform 3. 3-State Output Enable Time to High Level and Output Disable Time from High Level
Waveform 4. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level
1991 Feb 08
6
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
TEST CIRCUIT AND WAVEFORMS
VCC 7.0V NEGATIVE PULSE 90% VM 10% tTHL (tff) CL RL tw VM 10% tTLH (tr ) 0.3V 90% AMP (V)
VIN PULSE GENERATOR RT D.U.T.
VOUT
RL
tTLH (tr ) 90%
tTHL (tf ) AMP (V) 90% VM tw 10% 0.3V
Test Circuit for 3-State Outputs SWITCH POSITION TEST SWITCH closed tPLZ, tPZL All other open
POSITIVE PULSE 10%
VM
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
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.
SC00072
1991 Feb 08
7
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
1991 Feb 08
8
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1991 Feb 08
9
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm
SOT338-1
1991 Feb 08
10
Philips Semiconductors
Product specification
Data selector/multiplexer
74ALS257/74ALS258
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 11

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