INTEGRATED CIRCUITS 74ALS257/74ALS258 Data selector/multiplexer Product specification IC05 Data Handbook 1991 Feb 08 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 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. TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74ALS257 7.0ns 7mA 74ALS258 7.0ns 7mA TYPE 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. ORDERING INFORMATION ORDER CODE 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). 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 20µA/0.1mA S Select input 1.0/1.0 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 PIN CONFIGURATION – 74ALS258 S 1 16 VCC S 1 16 VCC I0a 2 15 OE I0a 2 15 OE I1a 3 14 I0d I1a 3 14 I0d Ya 4 13 I1d Ya 4 13 I1d I0b 5 12 Yd I0b 5 12 Yd I1b 6 11 I0c I1b 6 11 I0c Yb 7 10 I1c Yb 7 10 I1c GND 8 9 Yc GND 8 9 Yc SF00673 1991 Feb 08 SC00079 2 853–1130 01670 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 LOGIC SYMBOL – 74ALS257 2 3 5 I0a I1a I0b 1 LOGIC SYMBOL – 74ALS258 6 11 10 14 13 I1b I0c I1c I0d I1d 2 S 15 1 OE Yb Yc Yd 4 7 9 12 VCC = Pin 16 GND = Pin 8 IEC/IEEE SYMBOL – 74ALS257 14 I0a I1a I0b I1b I0c I1c I0d I1d 13 Ya Yb Yc Yd 4 7 9 12 OE SC00080 EN 1 MUX 1 3 10 15 G1 2 11 IEC/IEEE SYMBOL – 74ALS258 EN 1 6 VCC = Pin 16 GND = Pin 8 SF00674 15 5 S 15 Ya 3 G1 2 3 1 5 MUX 1 4 4 1 5 7 6 7 6 10 10 9 9 11 11 13 13 12 14 12 14 SF00675 SC00081 LOGIC DIAGRAM – 74ALS257 OE I0a 15 2 I1a 3 I0b I1b 5 4 VCC = Pin 16 GND = Pin 8 1991 Feb 08 Ya I0c 6 7 Yb 11 LOGIC DIAGRAM – 74ALS258 I1c 10 I0d 14 I1d S 13 1 9 Yc OE I0a 15 2 I1a 3 I0b I1b 5 4 12 VCC = Pin 16 GND = Pin 8 Yd SC00082 3 Ya I0c 6 7 Yb 11 I1c 10 I0d 14 I1d S 13 1 9 Yc 12 Yd SC00083 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 FUNCTION TABLE – 74ALS257 FUNCTION TABLE – 74ALS258 INPUTS INPUTS OUTPUT S I0n I1n Yn OE S I0n I1n Yn H X X X Z H X X X Z L L L X L L L L X H L L H X H L L H X L L H X L L L H X L H H X H H H X H L L H L X Z OUTPUT OE = = = = L High voltage level Low voltage level Don’t care High impedance “off” state H L X Z = = = = 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.) RATING UNIT VCC Supply voltage PARAMETER –0.5 to +7.0 V VIN Input voltage –0.5 to +7.0 V IIN Input current SYMBOL VOUT Voltage applied to output in High output state IOUT Current applied to output in Low output state Tamb Operating free-air temperature range Tstg Storage temperature range –30 to +5 mA –0.5 to VCC V 48 mA 0 to +70 °C –65 to +150 °C RECOMMENDED OPERATING CONDITIONS SYMBOL LIMITS PARAMETER MIN NOM MAX 5.0 5.5 VCC Supply voltage 4.5 VIH High-level input voltage 2.0 VIL Low-level input voltage UNIT V V 0.8 V IIK Input clamp current –18 mA IOH High-level output current –2.6 mA IOL Low-level output current 24 mA +70 °C Tamb 1991 Feb 08 Operating free-air temperature range 0 4 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL VOH O TEST CONDITIONS1 PARAMETER High level output voltage High-level LIMITS MIN VCC = ±10%,, VIL = MAX,, VIH = MIN IOH = –0.4mA VCC – 2 IOH = MAX 2.4 IOL = 12mA TYP2 MAX UNIT V 3.2 V 0.25 0.40 V 0.35 0.50 V –0.73 –1.5 V 0.1 mA VOL O Low level output voltage Low-level VCC = MIN,, VIL = MAX,, VIH = MIN VIK Input clamp voltage VCC = MIN, II = IIK II Input current at maximum input voltage VCC = MAX, VI = 7.0V 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 74ALS257 ICC Supply current (total) 74ALS258 IOL = 24mA –112 mA ICCH 3 6 mA ICCL 8 12 mA ICCZ 9 14 mA ICCH 2.5 4 mA 7 11 mA 9 13 mA ICCL VCC = MAX VCC = MAX ICCZ –30 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. 1991 Feb 08 5 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 AC ELECTRICAL CHARACTERISTICS LIMITS SYMBOL PARAMETER Tamb = 0°C to +70°C VCC = +5.0V ± 10% CL = 50pF, RL = 500Ω TEST CONDITION MIN MAX UNIT 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 Waveform 1, 2 4.0 4.0 12.0 12.0 ns tPZH tPZL Output enable time OE to Yn 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 Yn Waveform 1 2.0 2.0 8.0 8.0 ns tPLH tPHL Propagation delay S to Yn Waveform 1, 2 4.0 4.0 12.0 12.0 ns tPZH tPZL Output enable time OE to Yn 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 74ALS257 74ALS258 AC WAVEFORMS For all waveforms, VM = 1.3V. I0n, I1n, S VM I0n, I1n, S VM tPLH VM tPHL VM Yn, Yn VM tPHL VM tPLH VM Yn, Yn VM SC00059 SC00060 Waveform 1. Propagation Delay for Data and Select to Outputs OE VM Waveform 2. Propagation Delay for Data and Select to Outputs OEn VM tPZH tPHZ VOH -0.3V VM VM tPZL tPLZ 3.5V Yn, Yn Yn, Yn VM VM 0V VOL +0.3V SC00084 SC00085 Waveform 3. 3-State Output Enable Time to High Level and Output Disable Time from High Level 1991 Feb 08 Waveform 4. 3-State Output Enable Time to Low Level and Output Disable Time from Low Level 6 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 TEST CIRCUIT AND WAVEFORMS VCC 7.0V VIN VOUT PULSE GENERATOR tw 90% NEGATIVE PULSE 10% RL CL RL AMP (V) VM VM D.U.T. RT 90% 10% tTHL (tff) tTLH (tr ) tTLH (tr ) tTHL (tf ) 0.3V AMP (V) 90% Test Circuit for 3-State Outputs POSITIVE PULSE VM VM 10% 10% tw SWITCH POSITION TEST SWITCH closed tPLZ, tPZL All other 90% 0.3V Input Pulse Definition open INPUT PULSE REQUIREMENTS Family Amplitude VM 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. 74ALS 3.5V 1.3V Rep.Rate tw tTLH tTHL 1MHz 500ns 2.0ns 2.0ns SC00072 1991 Feb 08 7 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 DIP16: plastic dual in-line package; 16 leads (300 mil) 1991 Feb 08 8 SOT38-4 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 SO16: plastic small outline package; 16 leads; body width 3.9 mm 1991 Feb 08 9 SOT109-1 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm 1991 Feb 08 10 SOT338-1 Philips Semiconductors Product specification Data selector/multiplexer 74ALS257/74ALS258 DEFINITIONS Data Sheet Identification Product Status Definition Objective Specification Formative or in Design This data sheet contains the design target or goal specifications for product development. Specifications may change in any manner without notice. Preliminary Specification Preproduction Product 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. Product Specification Full Production 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. 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. Copyright Philips Electronics North America Corporation 1997 All rights reserved. Printed in U.S.A. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088–3409 Telephone 800-234-7381 1991 Feb 08 11