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INTEGRATED CIRCUITS
74F257A Quad 2-line to 1-line selector/multiplexer, non-inverting (3-State)
Product specification IC15 Data Handbook 1995 Mar 31
Philips Semiconductors
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting (3-State)
74F257A
FEATURES
* Industrial range available (-40C to +85C) * Multifunction capability * Non-inverting data path * 3-State outputs * See 74F258A for inverting version
DESCRIPTION
The 74F257A has four identical 2-input multiplexers with 3-State outputs which select 4 bits of data from two sources uncer control of a common Select (S) input. The I0a inputs are selected when the common Select input is Low and the I1n inputs are selected when the common Select input is High. Data appears at the outputs in true non-inverted form from the selected inputs. The 74F257A is the logic implementation of a 4-pole, 2-position switch where the position of the switch is determined by the logic levels supplied to the common Slect input. Outputs are forced to a high impedance "off" state when the Output Enable (OE) is High. All but one device must be in high impedance state to avoid currents that would exceed the maximum rating if the outputs were tied together. Design of the Output Enable signals must ensure that there is no overlap when outputs of 3-state devices were tied together.
PIN CONFIGURATION
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
TYPE 74F257A
TYPICAL PROPAGATION DELAY 4.3ns
TYPICAL SUPPLY CURRENT (TOTAL) 12mA
ORDERING INFORMATION
ORDER CODE DESCRIPTION 16-pin plastic DIP 16-pin plastic SO COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F257AN N74F257AD INDUSTRIAL RANGE VCC = 5V 10%, Tamb = -40C to +85C I74F257AN I74F257AD DRAWING NUMBER SOT38-4 SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS I0n, I1n S OE Ya - Yd DESCRIPTION Data inputs Common Select input Output Enable input (active Low) Data outputs 74F (U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 1.0/1.0 150/33 LOAD VALUE HIGH/LOW 20A/0.6mA 20A/0.6mA 20A/0.6mA 3.0mA/20mA
NOTE: One (1.0) FAST unit load is defined as: 20A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
2 3 5 6 11 10 14 13
LOGIC SYMBOL (IEEE/IEC)
15 1 EN G1
2 I0a I1a I0b 1 15 S OE Ya Yb Yc Yd I1b I0c I1c I0d I1d 3 5 6 10
1 1
MUX 4
7
9 11 13 12
VCC = Pin 16 GND = Pin 8
4
7
9
12
14
SF00674
SF00675
1995 Mar 31
2
853-0360 15059
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting (3-State)
74F257A
LOGIC DIAGRAM
OE 15 I0a 2 I1a 3 I0b 5 I1b 6 I0c 11 I1c 10 I0d 14 I1d 13 S 1
FUNCTION TABLE
INPUTS OE H L L L L H L X Z = = = = S X H H L L I0 X X X L H I1 X L H X X OUTPUT Y Z L H L H
High voltage level Low voltage level Don't care High impedance "off" state
4 Ya VCC = Pin 16 GND = Pin 8 Yb
7 Yc
9
12 Yd
SF00676
APPLICATION
ENABLE S2
C B A Y0 Y1 Y2 Y3 74F139
S1
S0 WORD A WORD B WORD C WORD D WORD E WORD F WORD G WORD H
I0a I1a I0b I1b I0c I1c I0d I1d OE S Ya Yb Yc Yd 74F257A
I0a I1a I0b I1b I0c I1c I0d I1d OE S Ya Yb Yc Yd 74F257A
I0a I1a I0b I1b I0c I1c I0d I1d OE S Ya Yb Yc Yd 74F257A
I0a I1a I0b I1b I0c I1c I0d I1d OE S Ya Yb Yc Yd 74F257A
4-BIT DATA BUS
SF00677
1995 Mar 31
3
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting (3-State)
74F257A
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits 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 Commercial range Operating free-air temperature range free air Industrial range Storage temperature range -40 to +85 -65 to +150 PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to VCC 48 0 to +70 UNIT V V mA V mA C 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 Commercial range Operating free-air temperature range free air Industrial range 0 -40 PARAMETER MIN 4.5 2.0 0.8 -18 -3 24 +70 +85 NOM 5.0 MAX 5.5 V V V mA mA mA C C UNIT
1995 Mar 31
4
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting (3-State)
74F257A
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS1 MIN VO OH High-level High level output voltage VCC = MIN, VIL = MAX, , , VIH = MIN, IOH = MAX VCC = MIN, VIL = MAX, , , VIH = MIN, IOL = MAX VCC = MIN, II = IIK VCC = MAX, VI = 7.0V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V VCC = MAX, VO = 2.7V VCC = MAX, VO = 0.5V VCC = MAX ICCH ICC Supply current4 (total) ICCL ICCZ VCC = MAX -60 9.0 14.5 15.0 LIMITS TYP2 UNIT MAX V 3.3 0.35 0.35 -0.73 0.50 0.50 -1.2 100 20 -0.6 50 -50 -150 15.0 22.0 23.0 V V V V A A mA A A mA mA mA mA
10%VCC 5%VCC 10%VCC 5%VCC
2.4 2.7
VO OL VIK II IIH IIL IOZH IOZL IOS
Low-level Low level output voltage 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 Short-circuit 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. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a High output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, IOS tests should be performed last. 4. Measure ICC with all outputs open and inputs grounded.
AC ELECTRICAL CHARACTERISTICS
LIMITS TEST CONDITION Tamb = +25C VCC = +5.0V CL = 50pF RL = 500 MIN tPLH tPHL tPLH tPHL tPZH tPZL tPHZ tPLZ Propagation delay In to Yn Propagation delay S to Yn Output Enable time to High or Low level Output Disable time from High or Low level Waveform 1 Waveform 1 Waveform 2 Waveform 3 Waveform 2 Waveform 3 3.0 2.0 5.0 4.0 4.5 4.5 2.0 2.0 TYP 4.5 3.5 7.5 5.5 6.5 6.0 4.0 3.5 MAX 6.0 5.0 9.5 7.0 7.5 7.5 5.5 5.5 Tamb = 0C to +70C VCC = +5.0V 10% CL = 50pF RL = 500 MIN 3.0 2.0 5.0 4.0 4.5 4.5 2.0 2.0 MAX 7.0 6.0 10.5 8.0 8.5 8.5 6.0 6.0 Tamb = -40C to +85C VCC = +5.0V 10% CL = 50pF RL = 500 MIN 3.0 2.0 5.0 4.0 4.5 4.5 2.0 2.0 MAX 7.0 7.0 10.5 8.5 8.5 8.5 6.0 6.0 ns ns ns ns
SYMBOL
PARAMETER
UNIT
1995 Mar 31
5
Philips Semiconductors
Product specification
Quad 2-line to 1-line selector/multiplexer, non-inverting (3-State)
74F257A
AC WAVEFORMS
For all waveforms, VM = 1.5V.
In or S
VM tPHL
VM tPLH
Yn
VM
VM
SF00679
Waveform 1. Propagation Delay, Data and Select to Output
OE VM tPZH VM tPHZ
OE VM tPZL Yn VM VOH-0.3V 0V VM VOL+0.3V VM tPLZ
Yn
SF00213
SF00214
Waveform 2. 3-State Output Enable Time to High Level and Output Disable Time from High Level
Waveform 3. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level
TEST CIRCUIT AND WAVEFORMS
VCC 7.0V VIN PULSE GENERATOR RT D.U.T. VOUT RL NEGATIVE PULSE 90% VM 10% tTHL (tf ) CL RL tTLH (tr ) 90% POSITIVE PULSE 10% tTHL (tf ) AMP (V) 90% VM tw 10% 0V tw VM 10% tTLH (tr ) 0V AMP (V)
90%
Test Circuit for 3-State Outputs SWITCH POSITION TEST tPLZ tPZL All other SWITCH closed closed open
VM
Input Pulse Definition
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 REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate 1MHz tw 500ns tTLH 2.5ns tTHL 2.5ns
SF00777
1995 Mar 31
6
Philips Semiconductors
Product specification
Quad 2-line 1-line selector/multiplexer, non-inverting (3-State)
74F257A
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
1995 Mar 31
7
Philips Semiconductors
Product specification
Quad 2-line 1-line selector/multiplexer, non-inverting (3-State)
74F257A
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1995 Mar 31
8
Philips Semiconductors
Product specification
Quad 2-line 1-line selector/multiplexer, non-inverting (3-State)
74F257A
NOTES
1995 Mar 31
9
Philips Semiconductors
Product specification
Quad 2-line 1-line selector/multiplexer, non-inverting (3-State)
74F257A
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 Philips Semiconductors and Philips Electronics North America Corporation register eligible circuits under the Semiconductor Chip Protection Act. (c) Copyright Philips Electronics North America Corporation 1996 All rights reserved. Printed in U.S.A. (print code) Document order number: Date of release: July 1994 9397-750-05107

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