74ALS257资料

元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specificationData selector/multiplexer74ALS257/74ALS25874ALS257Quad 2-input data selector, non-inverting (3-State)74ALS258Quad 2-input data selector, inverting (3-State)DESCRIPTIONTYPICALThe 74ALS257 is a quad 2-input multiplexer which selects 4 bits ofTYPETYPICALdata from one of two sources under the control of a common selectPROPAGATION DELAYSUPPLY CURRENT(TOTAL)input (S). The output enable input (OE) is active when Low. WhenOE is High, all of the outputs (Yn) are forced to a High impedance74ALS2577.0ns7mAstate (3-State) regardless of all other input conditions.74ALS2587.0ns7mAMoving data from two registers to a common output bus is a typicaluse of the 74ALS257. The state of the select input determines theORDERING INFORMATIONparticular register from which data comes.ORDER CODEThe device is the logic implementation of 4-pole, 2-position switchDESCRIPTIONCOMMERCIAL RANGEDRAWINGwhere the position of the switch is determined by the logic levelsVCC = 5V ±10%,NUMBERsupplied to the select input. The 74ALS258 is similar but hasTamb = 0°C to +70°Cinverting outputs (Yn).16-pin plastic DIP74ALS257N, 74ALS258SOT38-416-pin plastic SO74ALS257D, 74ALS258DSOT109-116-pin plastic SSOPType II74ALS257DB, 74ALS258DBSOT338-1INPUT AND OUTPUT LOADING AND FAN-OUT TABLEPINSDESCRIPTION74ALS (U.L.) LOAD VALUEHIGH/LOW HIGH/LOWIna, Inb, Inc, IndData inputs1.0/1.020µA/0.1mASSelect input1.0/1.020µA/0.1mAOEEnable input1.0/1.020µA/0.1mAYa – Yd, Ya – YdData outputs20/2400.4mA/24mANOTE:One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state.PIN CONFIGURATION – 74ALS257PIN CONFIGURATION – 74ALS258S116VCCS116VCCI0a215OEI0a215OEI1a314I0dI1a314I0dYa413I1dYa413I1dI0b512YdI0b512YdI1b611I0cI1b611I0cYb710I1cYb710I1cGNDYcGNDYcSF00673SC000791991 Feb 082853–1130 01670元器件交易网www.cecb2b.comPhilips SemiconductorsData selector/multiplexerLOGIC SYMBOL – 74ALS257235611101413I0aI1aI0bI1bI0cI1cI0dI1d1S15OEYaYbYcYdVCC = Pin 17912GND = Pin 8SF00674IEC/IEEE SYMBOL – 74ALS25715EN1G121MUX34156710119131412SF00675LOGIC DIAGRAM – 74ALS257OEI0aI1aI0bI1bI0cI1cI0dI1dS15235611101413147912VCC = Pin 16GND = Pin 8YaYbYcYdSC000821991 Feb 08Product specification74ALS257/74ALS258LOGIC SYMBOL – 74ALS258235611101413I0aI1aI0bI1bI0cI1cI0dI1d1S15OEYaYbYcYdVCC = Pin 17912GND = Pin 8SC00080IEC/IEEE SYMBOL – 74ALS25815EN1G121MUX34156710119131412SC00081LOGIC DIAGRAM – 74ALS258OEI0aI1aI0bI1bI0cI1cI0dI1dS15235611101413147912VCC = Pin 16GND = Pin 8YaYbYcYdSC000833元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specificationData selector/multiplexer74ALS257/74ALS258FUNCTION TABLE – 74ALS257FUNCTION TABLE – 74ALS258INPUTSOUTPUTINPUTSOUTPUTOESI0nI1nYnOESI0nI1nYnHXXXZHXXXZLLLXLLLLXHLLHXHLLHXLLHXLLLHXLHLHXHHLHXHLH=High voltage levelH=High voltage levelL=Low voltage levelL=Low voltage levelX=Don’t careX=Don’t careZ=High impedance “off” stateZ=High impedance “off” stateABSOLUTE 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.)SYMBOLPARAMETERRATINGUNITVCCSupply voltage–0.5 to +7.0VVINInput voltage–0.5 to +7.0VIINInput current–30 to +5mAVOUTVoltage applied to output in High output state–0.5 to VCCVIOUTCurrent applied to output in Low output state48mATambOperating free-air temperature range0 to +70°CTstgStorage temperature range–65 to +150°CRECOMMENDED OPERATING CONDITIONSSYMBOLPARAMETERLIMITSMINNOMMAXUNITVCCSupply voltage4.55.05.5VVIHHigh-level input voltage2.0VVILLow-level input voltage0.8VIIKInput clamp current–18mAIOHHigh-level output current–2.6mAIOLLow-level output current24mATambOperating free-air temperature range0 +70°C1991 Feb 084元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specificationData selector/multiplexer74ALS257/74ALS258DC ELECTRICAL CHARACTERISTICS(Over recommended operating free-air temperature range unless otherwise noted.)SYMBOLPARAMETERTEST CONDITIONSTESTCONDITIONS1LIMITSMINTYP2MAXUNITVIOH = –0.4mAVCC – 2VOHOHighHigh-level output voltageleveloutputvoltageVVCC = ±10%, V,IL = MAX, ,IH = MINIOH = MAX2.43.2VVIOL = 12mA0.250.40VOLOLowLow-level output voltageleveloutputvoltageVCC = MIN, V,IL = MAX, ,VIH = MINIOL = 24mA0.350.50VVIKInput clamp voltageVCC = MIN, II = IIK–0.73–1.5VIIInput current at maximum input voltageVCC = MAX, VI = 7.0V0.1mAIIHHigh-level input currentVCC = MAX, VI = 2.7V20µAIILLow-level input currentVCC = MAX, VI = 0.4V–0.1mAIOZHOff-state output current,High-level voltage appliedVCC = MAX, VI = 2.7V20µAIOZLOff-state output current,Low-level voltage appliedVCC = MAX, VI = 0.4V–20µAIOOutput current3VCC = MAX, VO = 2.25V–30–112mAICCH36mA74ALS257ICCLVCC = MAX812mAI914mACCSupplySupply current (total)current(total)ICCZICCH2.mA74ALS258ICCLVCC = MAX711mAICCZ913mANOTES: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 085元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specificationData selector/multiplexer74ALS257/74ALS258AC ELECTRICAL CHARACTERISTICSLIMITSTC to +70°CSYMBOLPARAMETERTEST CONDITIONVamb = 0°CC = +5.0V ± 10%UNITCL = 50pF, RL = 500ΩMINMAXtPropagation delay2.09.0tPLHPHLI0n or I1n to YnWaveform 12.09.0nstPropagation delay4.012.0tPLHPHLS to YnWaveform 1, 24.012.0nstOutput enable time74ALS257Waveform 33.011.0tPZHPZLOE to YnWaveform 44.012.0nstOutput disable time Waveform 32.09.0tPHZPLZOE to YnWaveform 45.012.0nstPropagation delay8.0tPLHPHLI0n or I1n to YnWaveform 12.02.08.0nstPropagation delay12.0tPLHPHLS to YnWaveform 1, 24.012.0nstOutput enable time74ALS2584.0Waveform 33.011.0tPZHPZLOE to YnWaveform 44.012.0nstOutput disable time Waveform 32.09.0tPHZPLZOE to YnWaveform 45.012.0nsAC WAVEFORMSFor all waveforms, VM = 1.3V.I0n, I1n, SVMVMI0n, I1n, SVMVMtPLHtPHLtPHLtPLHYn, YnVMVMYn, YnVMVMSC00059SC00060Waveform 1.Propagation Delay for Data and Waveform 2.Propagation Delay for Data and Select to OutputsSelect to OutputsOEVMVMOEnVMVMtPZHtPHZVOH -0.3VtPZLtPLZ3.5VYn, YnVMYn, YnVM0VVOL +0.3VSC00084SC00085Waveform 3.3-State Output Enable Time to High LevelWaveform 4.3-State Output Enable Time to Low Leveland Output Disable Time from High Leveland Output Disable Time from Low Level1991 Feb 086元器件交易网www.cecb2b.comPhilips SemiconductorsProduct specificationData selector/multiplexer74ALS257/74ALS258TEST CIRCUIT AND WAVEFORMSVCCtw7.0V90%90%AMP (V)NEGATIVEPULSEVMVMVINVOUTR10%10%PULSEL0.3VGENERATORD.U.T.tTHL (tff)tTLH (tr )RTCLRLtTLH (tr )tTHL (tf )90%90%AMP (V)POSITIVEPULSEVMVTest Circuit for 3-State OutputsM10%SWITCH POSITIONt10%w0.3VTESTSWITCHtPLZ, tPZLclosedInput Pulse DefinitionAll otheropenFamilyINPUT PULSE REQUIREMENTSDEFINITIONS:AmplitudeVMRep.RatetwtTLHtTHLRL=Load resistor; see AC electrical characteristics for value.74ALS3.5V1.3V1MHz500ns2.0ns2.0nsCL=Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value.RT=Termination resistance should be equal to Zpulse generators.OUT of SC000721991 Feb 087元器件交易网www.cecb2b.com

Philips Semiconductors

Product specification

Data selector/multiplexer74ALS257/74ALS258

DIP16:plastic dual in-line package; 16 leads (300 mil)SOT38-4

1991 Feb 088

元器件交易网www.cecb2b.com

Philips Semiconductors

Product specification

Data selector/multiplexer74ALS257/74ALS258

SO16:plastic small outline package; 16 leads; body width 3.9 mmSOT109-1

1991 Feb 0

元器件交易网www.cecb2b.com

Philips Semiconductors

Product specification

Data selector/multiplexer74ALS257/74ALS258

SSOP16:plastic shrink small outline package; 16 leads; body width 5.3 mmSOT338-1

1991 Feb 0810

元器件交易网www.cecb2b.com

Philips Semiconductors

Product specification

Data selector/multiplexer74ALS257/74ALS258

DEFINITIONS

Data Sheet Identification

Objective SpecificationProduct Status

Formative or in Design

Definition

This data sheet contains the design target or goal specifications for product development. Specificationsmay change in any manner without notice.

This data sheet contains preliminary data, and supplementary data will be published at a later date. PhilipsSemiconductors reserves the right to make changes at any time without notice in order to improve designand supply the best possible product.

This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changesat any time without notice, in order to improve design and supply the best possible product.

Preliminary SpecificationPreproduction Product

Product SpecificationFull 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. PhilipsSemiconductors 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 maskwork right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposesonly. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testingor 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 expectedto result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling PhilipsSemiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fullyindemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.Philips Semiconductors811 East Arques AvenueP.O. Box 3409

Sunnyvale, California 94088–3409Telephone 800-234-7381

© Copyright Philips Electronics North America Corporation 1997

All rights reserved. Printed in U.S.A.

PhilipsSemiconductors1991 Feb 0811