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INTEGRATED CIRCUITS
74LVC157A Quad 2-input multiplexer
Product specification Supercedes data of 1997 Nov 07 IC24 Data Handbook 1998 Jul 29
Philips Semiconductors
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
FEATURES
* Wide supply voltage range of 1.2 to 3.6 V * In accordance with JEDEC standard no. 8-1A * CMOS lower power consumption * Direct interface with TTL levels * 5 Volt tolerant inputs, for interfacing with 5 Volt logic
DESCRIPTION
The 74LVC157A is a high-performance, low-power, Si-gate CMOS device, superior to most advanced CMOS compatible TTL families. Inputs can be driven from either 3.3V or 5.0V devices. In 3-State operation, outputs can handle 5V. This feature allows the use of these devices as translators in a mixed 3.3V/5V environment. The 74LVC157A is a quad 2-input multiplexer which select 4 bits of data from two sources under the control of a common data select
input (S). The four outputs present the selected data in the true (non-inverted) form. The enable input (E) is active LOW. When E is HIGH, all of the outputs (1Y to 4Y) are forced LOW regardless of all other input conditions. Moving the data from two groups of registers to four common output buses is a common use of the 74LV157. The state of the common data select input (S) determines the particular register from which the data comes. It can also be used as function generator. The device is useful for implementing highly irregular logic by generating any four of the 16 different functions of two variables with one variable common. The 74LVC157A is the logic implementation of a 4-pole, 2-position switch, where the position of the switch is determined by the logic levels applied to S.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25C; tr = tf 2.5 ns SYMBOL tPHL/tPLH CI CPD PARAMETER Propagation delay nl0, nl1, to nY E to nY S to nY Input capacitance Power dissipation capacitance per gate VI = GND to VCC1 CONDITIONS CL = 50 pF; VCC = 3.3 V TYPICAL 3.1 3.0 3.3 5.0 33 UNIT ns pF pF
NOTES: 1. CPD is used to determine the dynamic power dissipation (PD in W) PD = CPD x VCC2 x fi ) (CL x VCC2 x fo) where: fi = input frequency in MHz; CL = output load capacitance in pF; fo = output frequency in MHz; VCC = supply voltage in V; (CL x VCC2 x fo) = sum of the outputs.
ORDERING INFORMATION
PACKAGES 16-Pin Plastic SO 16-Pin Plastic SSOP Type II 16-Pin Plastic TSSOP Type I TEMPERATURE RANGE -40C to +85C -40C to +85C -40C to +85C OUTSIDE NORTH AMERICA 74LVC157A D 74LVC157A DB 74LVC157A PW NORTH AMERICA 74LVC157A D 74LVC157A DB 74LVC157APW DH PKG. DWG. # SOT109-1 SOT338-1 SOT403-1
PIN CONFIGURATION
S 1I 1I 0 1 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 V CC E 4I 4I 0 1
PIN DESCRIPTION
PIN NUMBER 1 2, 5, 11, 14 3, 6, 10, 13 4, 7, 9, 12 8
3I 3I 0 1
SYMBOL S 1l0 to 4l0 1l1 to 4l1 1Y to 4Y GND E VCC
FUNCTION Common data select input Data inputs from sources 0 Data inputs from sources 1 Multiplexer outputs Ground (0 V) Enable input (active LOW) Positive supply voltage
1Y 2I 2I 0 1
4Y
15 16
2Y GND
3Y
SV00563
1998 Jul 29
2
853-1945 19802
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
LOGIC SYMBOL
2 3 5 6 11 10 14 13
FUNCTIONAL DIAGRAM
2 3 1I0 1 15 S E 1Y 2Y 3Y 4Y 11 10 1I1 2I0 2I1 3I0 3I1 4I0 4I1 5 6
1I 0 1I 1 1Y 4
2I 0 2I 1 SELECTOR MULTIPLEXER OUTPUTS 3Y 3I 1 4I 0 4I 1 4Y 12 9 2Y 7
3I 0
4
7
9
12
14
SV00564
13
LOGIC SYMBOL (IEEE/IEC)
1 15 G1 EN
S 1
E 15
SV00566
FUNCTION TABLE
2 3 5 7 6 11 9 10 14 12 13
INPUTS
1 1 MUX 4
OUTPUTS nl0 X L H X X nl1 X X X L H nY L L H L H
E H L L L L
S X L L H H
NOTES: H = HIGH voltage level L = LOW voltage level X = don't care
LOGIC DIAGRAM
SV00565
S
E 1I1 1I0
1Y
2I1 2Y 2I0
3I1 3I0
3Y
4I1 4I0
4Y
SV00581
1998 Jul 29
3
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL PARAMETER DC supply voltage (for max. speed performance) VCC VI VO Tamb tr, tf DC supply voltage (for low-voltage applications) DC input voltage range DC output voltage range Operating free-air temperature range Input rise and fall times VCC = 1.2 to 2.7V VCC = 2.7 to 3.6V CONDITIONS MIN 2.7 1.2 0 0 -40 0 0 MAX 3.6 3.6 5.5 VCC +85 20 10 V V V C ns/V UNIT
ABSOLUTE MAXIMUM RATINGS1
In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0V). SYMBOL VCC IIK VI IOK VO IO IGND, ICC Tstg PTOT PARAMETER DC supply voltage DC input diode current DC input voltage DC output diode current DC output voltage DC output diode current DC VCC or GND current Storage temperature range Power dissipation per package - plastic mini-pack (SO) - plastic shrink mini-pack (SSOP and TSSOP) above +70C derate linearly with 8 mW/K above +60C derate linearly with 5.5 mW/K VI t 0 Note 2 VO uVCC or VO t 0 Note 2 VO = 0 to VCC CONDITIONS RATING -0.5 to +6.5 -50 -0.5 to +5.5 "50 -0.5 to VCC +0.5 "50 "100 -65 to +150 500 500 UNIT V mA V mA V mA mA C
mW
NOTES: 1. Stresses beyond those listed 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. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1998 Jul 29
4
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0V). LIMITS SYMBOL PARAMETER TEST CONDITIONS Temp = -40C to +85C MIN VIH HIGH level Input voltage VCC = 1.2V VCC = 2.7 to 3.6V LOW level Input voltage VCC = 1.2V VCC = 2.7 to 3.6V VCC = 2.7V; VI = VIH or VIL; IO = -12mA VO OH HIGH level output voltage VCC = 3.0V; VI = VIH or VIL; IO = -100A VCC = 3.0V; VI = VIH or VIL; IO = -18mA VCC = 3.0V; VI = VIH or VIL; IO = -24mA VCC = 2.7V; VI = VIH or VIL; IO = 12mA VOL LOW level output voltage VCC = 3.0V; VI = VIH or VIL; IO = 100A VCC = 3.0V; VI = VIH or VIL; IO = 24mA II ICC ICC Input leakage current Quiescent supply current Additional quiescent supply current per input pin VCC = 3 6V; VI = 5 5V or GND 3.6V; 5.5V VCC = 3.6V; VI = VCC or GND; IO = 0 VCC = 2.7V to 3.6V; VI = VCC -0.6V; IO = 0 "0.1 "0 1 0.1 5 GND VCC*0.5 VCC*0.2 VCC*0.6 VCC*0.8 0.40 0.20 0.55 "5 10 500 A A A V VCC V VCC 2.0 GND V 0.8 TYP1 MAX V UNIT
VIL
NOTE: 1. All typical values are measured at VCC = 3.3V and Tamb = 25C.
AC CHARACTERISTICS
GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF; RL = 500W; Tamb = -40_C to +85_C LIMITS SYMBOL PARAMETER Propagation delay nl0 to nY; nl1 to nY Propagation delay E to nY Propagation delay S to nY WAVEFORM VCC = 3.3V 0.3V MIN tPHL/tPLH tPHL/tPLH tPHL/tPLH Figure 2, 3 Figure 1, 3 Figure 2, 3 1.5 1.5 1.5 TYP1 3.1 3.0 3.3 MAX 5.7 6.3 6.8 VCC = 2.7V MIN 1.5 1.5 1.5 MAX 6.7 7.3 7.8 VCC = 1.2V TYP 12 11 13 ns ns ns UNIT
NOTE: 1. These typical values are at VCC = 3.3V and Tamb = 25C.
1998 Jul 29
5
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
AC WAVEFORMS
VM = 0.5 x VCC at VCC < 2.7 V VM = 1.5 V at VCC 2.7 V VX = VOL + 0.3 V at VCC 2.7 V VX = VOL + 0.1 x VCC at VCC < 2.7 V VY = VOH - 0.3 V at VCC 2.7V VY = VOH - 0.1 x VCC at VCC < 2.7 V VOL and VOH are the typical output voltage drop that occur with the output load.
VI E INPUT GND t PHL V OH nY OUTPUTS V OL VM t PLH VM
TEST CIRCUIT
VCC S1 2 * VCC Open GND
500 VI PULSE GENERATOR RT D.U.T. VO
50pF
CL
500
SWITCH POSITION
TEST tPLH/tPHL S1 Open VCC < 2.7V 2.7-3.6V VI VCC 2.7V
SV00903 SV00561
Figure 3. Load circuitry for switching times.
Figure 1. Enable input (E) to output (nY) propagation delays.
VI nI0, nI1, S INPUTS GND t PHL V OH nY OUTPUT V OL VM t PLH VM
SV00562
Figure 2. Data inputs (nI0, nI1) and common data select input (S) to output (nY) propagation delays.
1998 Jul 29
6
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1998 Jul 29
7
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm
SOT338-1
1998 Jul 29
8
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
1998 Jul 29
9
Philips Semiconductors
Product specification
Quad 2-input multiplexer
74LVC157A
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification 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 chages 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.
Production
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves 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. 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 1998 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 08-98 9297-750-04495
Philips Semiconductors
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