74ALS257D

74ALS257 PHILIPS | Alldatasheet

Document overview

• Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
• PDF pages: 11

Technical content

/C0109 /C0110 /C0114 74ALS257/74ALS258 Data selector/multiplexer Product specification IC05 Data Handbook

1991 Feb 08

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer 74ALS257 Quad 2-input data selector, non-inverting (3-State) 74ALS258 Quad 2-input data selector, inverting (3-State)

21991 Feb 08 853–1130 01670

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 (Y n). TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74ALS257 7.0ns 7mA 74ALS258 7.0ns 7mA

ORDERING INFORMATION

DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C DRAWING NUMBER 16-pin plastic DIP 74ALS257N, 74ALS258 SOT38-4 16-pin plastic SO 74ALS257D, 74ALS258D SOT109-1 16-pin plastic SSOP Type II 74ALS257DB, 74ALS258DB SOT338-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74ALS (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW Ina, Inb, Inc, Ind Data inputs 1.0/1.0 20µA/0.1mA S Select input 1.0/1.0 20µA/0.1mA OE Enable input 1.0/1.0 20µA/0.1mA Ya – Yd, Ya – Yd Data outputs 20/240 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 – 74ALS257 107 Yb VCC Yd I0c I1c I1d OE I0d S I0a I1b I1a Ya I0b 98GND Yc SF00673 PIN CONFIGURATION – 74ALS258 107 Yb VCC Yd I0c I1c I1d OE I0d S I0a I1b I1a Ya I0b 98GND Y c SC00079

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 3

LOGIC SYMBOL – 74ALS257 VCC = Pin 16 GND = Pin 8 SF00674 S OE 2356 1 1 1 0 1 4 I0a I1a I0b I1b I0c I1c I0d Ya Yb Yc Yd 479 1 2 I1d LOGIC SYMBOL – 74ALS258 VCC = Pin 16 GND = Pin 8 SC00080 S OE 2356 1 1 1 0 1 4 I0a I1a I0b I1b I0c I1c I0d Ya Yb Yc Yd 479 1 2 I1d IEC/IEEE SYMBOL – 74ALS257 SF00675 2 1 15 EN 1 G1 MUX IEC/IEEE SYMBOL – 74ALS258 SC00081 2 1 15 EN 1 G1 MUX LOGIC DIAGRAM – 74ALS257 OE I0a I1a I0b I1b I0c I1c I0d I1d S 1 5 2 3561 1 1 0 1 4 1 3 1 Ya Yb Yc Yd 47 91 2 VCC = Pin 16 GND = Pin 8 SC00082 LOGIC DIAGRAM – 74ALS258 OE I0a I1a I0b I1b I0c I1c I0d I1d S 1 5 2 3561 1 1 0 1 4 1 3 1 YaY bY cY d 47 91 2 VCC = Pin 16 GND = Pin 8 SC00083

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 4

FUNCTION TABLE – 74ALS257 INPUTS OUTPUT OE S I0n I1n Yn H X X X Z L L L X L L L H X H L H X L L L H X H H H = High voltage level L = Low voltage level X = Don’t care Z = High impedance “off” state FUNCTION TABLE – 74ALS258 INPUTS OUTPUT OE S I0n I1n Yn H X X X Z L L L X H L L H X L L H X L H L H X H L H = High voltage level L = Low voltage level X = Don’t care Z = 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 PARAMETER RATING UNIT VCC Supply voltage –0.5 to +7.0 V VIN Input voltage –0.5 to +7.0 V IIN Input current –30 to +5 mA VOUT Voltage applied to output in High output state –0.5 to VCC V IOUT Current applied to output in Low output state 48 mA Tamb Operating free-air temperature range 0 to +70 °C Tstg Storage temperature range –65 to +150 °C RECOMMENDED OPERATING CONDITIONS SYMBOL PARAMETER LIMITS UNITSYMBOL PARAMETER MIN NOM MAX UNIT VCC Supply voltage 4.5 5.0 5.5 V VIH High-level input voltage 2.0 V VIL Low-level input voltage 0.8 V IIK Input clamp current –18 mA IOH High-level output current –2.6 mA IOL Low-level output current 24 mA Tamb Operating free-air temperature range 0 +70 °C

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 5

DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS 1 LIMITS UNITSYMBOL PARAMETER TEST CONDITIONS 1 MIN TYP 2 MAX UNIT VO High level output voltage VCC = ±10%, VIL = MAX, IOH = –0.4mA VCC – 2 V VOH High-level output voltage CC , IL , VIH = MIN IOH = MAX 2.4 3.2 V VO Low level output voltage VCC = MIN, VIL = MAX, IOL = 12mA 0.25 0.40 V VOL Low-level output voltage CC , IL , VIH = MIN IOL = 24mA 0.35 0.50 V VIK Input clamp voltage VCC = MIN, II = IIK –0.73 –1.5 V II Input current at maximum input voltageVCC = MAX, VI = 7.0V 0.1 mA IIH High-level input current VCC = MAX, VI = 2.7V 20 µA IIL Low-level input current VCC = MAX, VI = 0.4V –0.1 mA IOZH Off-state output current, High-level voltage applied VCC = MAX, VI = 2.7V 20 µA IOZL Off-state output current, Low-level voltage applied VCC = MAX, VI = 0.4V –20 µA IO Output current3 VCC = MAX, VO = 2.25V –30 –112 mA ICCH 3 6 mA 74ALS257 ICCL VCC = MAX 8 12 mA ICC Supply current (total) ICCZ 9 14 mA ICC Supply current (total) ICCH 2.5 4 mA 74ALS258 ICCL VCC = MAX 7 11 mA ICCZ 9 13 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 = 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 .

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 6

AC ELECTRICAL CHARACTERISTICS LIMITS SYMBOL PARAMETER TEST CONDITION Tamb = 0°C to +70°C VCC = +5.0V ± 10% C L = 50pF, RL = 500Ω UNIT MIN MAX tPLH tPHL Propagation delay I0n or I1n to Yn Waveform 1 2.0 2.0 9.0 9.0 ns tPLH tPHL Propagation delay S to Yn 74ALS257 Waveform 1, 2 4.0 4.0 12.0 12.0 ns tPZH tPZL Output enable time OE to Yn 74ALS257 Waveform 3 Waveform 4 3.0 4.0 11.0 12.0 ns tPHZ tPLZ Output disable time OE to Yn Waveform 3 Waveform 4 2.0 5.0 9.0 12.0 ns tPLH tPHL Propagation delay I0n or I1n to Y n Waveform 1 2.0 2.0 8.0 8.0 ns tPLH tPHL Propagation delay S to Y n 74ALS258 Waveform 1, 2 4.0 4.0 12.0 12.0 ns tPZH tPZL Output enable time OE to Yn 74ALS258 Waveform 3 Waveform 4 3.0 4.0 11.0 12.0 ns tPHZ tPLZ Output disable time OE to Yn Waveform 3 Waveform 4 2.0 5.0 9.0 12.0 ns AC WAVEFORMS For all waveforms, VM = 1.3V. VM VM VM VM tPHLtPLH I0n, I1n, S Yn, Yn SC00059 Waveform 1. Propagation Delay for Data and Select to Outputs VM VM VM VM tPLHtPHL I0n, I1n, S Yn, Yn SC00060 Waveform 2. Propagation Delay for Data and Select to Outputs VM VM VM tPHZtPZH OE Yn, Yn VOH -0.3V SC00084 Waveform 3. 3-State Output Enable Time to High Level and Output Disable Time from High Level VM VM VM tPLZtPZL OE n Yn, Yn VOL +0.3V SC00085 3.5V Waveform 4. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 7

TEST CIRCUIT AND WAVEFORMS tw 90% VM 10% 90% VM 10% 90% VM 10% 90% VM 10% NEGATIVE PULSE POSITIVE PULSE tw AMP (V) 0.3V 0.3V tTHL (tff) INPUT PULSE REQUIREMENTS Rep.Rate tw tTLH tTHL 1MHz 500ns 2.0ns 2.0ns Input Pulse Definition VCC Family 74ALS D.U.T.PULSE GENERATOR R LC LR T VIN VOUT Test Circuit for 3-State Outputs DEFINITIONS: R L = Load resistor; see AC electrical characteristics for value. C L = Load capacitance includes jig and probe capacitance; see AC electrical characteristics for value. R T = Termination resistance should be equal to ZOUT of pulse generators. tTHL (tf ) tTLH (tr ) tTLH (tr ) AMP (V) Amplitude 3.5V 1.3V VM SC00072 R L 7.0V SWITCH POSITION TEST SWITCH tPLZ , tPZL closed All other open

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 8

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

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 9

SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 10

SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1

Philips Semiconductors Product specification 74ALS257/74ALS258Data selector/multiplexer

1991 Feb 08 11

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. 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. Philips Semiconductors

811 East Arques Avenue

P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 DEFINITIONS Data Sheet Identification Product Status Definition Objective Specification Preliminary Specification Product Specification Formative or in Design Preproduction Product Full Production 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 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.  Copyright Philips Electronics North America Corporation 1997 All rights reserved. Printed in U.S.A. /C0109 /C0110 /C0114