INTEGRATED CIRCUITS 1991 Feb 08 IC05 Data Handbook
FEATURES Demultiplexing capability Two independent 1-of-4 decoders Multi-function capability PIN CONFIGURATION Ea 1 A0a 2 A1a 3 16 15 14 V CC Eb A0b DESCRIPTION The is a dual 1-of-4 decoder/demultiplexer. This device has two independent decoders, each accepting two binary weighted inputs (A 0n, A 1n ) and providing four mutually exclusive active-low outputs (Q0n Q3n). Each decoder has an active-low enable (E). When E is High, every output is forced High. The enable can be used as the data input for a 1-of-4 demultiplexer application. Q0a Q1a Q2a Q3a GND 4 5 6 7 8 13 12 11 10 9 A1b Q0b Q1b Q2b Q3b SF00129 TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 6.0ns 4mA ORDERING INFORMATION DESCRIPTION ORDER CODE COMMERCIAL RANGE V CC = 5V ±10%, T amb = 0 C to +70 C DRAWING NUMBER 16-pin plastic DIP N SOT38-4 16-pin plastic SO D SOT109-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE NOTE: PINS DESCRIPTION 74ALS (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW A0n, A1n Address inputs 1.0/1.0 20µA/0.1mA Ea, Eb Enable inputs (active-low) 1.0/1.0 20µA/0.1mA Q0n, Q1n Data outputs 20/80 0.4mA/8mA One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state. LOGIC SYMBOL IEC/IEEE SYMBOL 1 2 3 Ea A0a A1a DECODER a 15 14 13 Eb A0b A1b DECODER b 2 3 1 0 1 DEMUX G 0 3 0 1 2 3 4 5 6 7 Q0a Q1a Q2a Q3a Q0b Q1b Q2b Q3b 14 12 13 11 4 5 6 7 12 11 10 9 15 10 9 V CC = Pin 16 GND = Pin 8 SF00130 SF00131 1991 Feb 08 2 853 1426 01670
LOGIC DIAGRAM Ea A0a A1a 1 2 3 Eb A0b A1b 15 14 13 FUNCTION TABLE INPUTS OUTPUTS E A0 A1 Q0 Q1 Q2 Q3 H X X H H H H L L L L H H H L H L H L H H L L H H H L H L H H H H H L H = High voltage level L = Low voltage level X = Don t care 4 5 6 7 Q0a Q1a Q2a Q3a 12 11 10 9 Q0b Q1b Q2b Q3b V CC = Pin 16 GND = Pin 8 SF00132 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 V CC Supply voltage 0.5 to +7.0 V V IN Input voltage 0.5 to +7.0 V I IN Input current 30 to +5 ma V OUT Voltage applied to output in High output state 0.5 to V CC V I OUT Current applied to output in Low output state 16 ma T amb Operating free-air temperature range 0 to +70 C T stg Storage temperature range 65 to +150 C RECOMMENDED OPERATING CONDITIONS SYMBOL PARAMETER LIMITS MIN NOM MAX V CC Supply voltage 4.5 5.0 5.5 V V IH High-level input voltage 2.0 V V IL Low-level input voltage 0.8 V I Ik Input clamp current 18 ma I OH High-level output current 0.4 ma I OL Low-level output current 8 ma T amb Operating free-air temperature range 0 +70 C UNIT 1991 Feb 08 3
DC ELECTRICAL CHARACTERISTICS (Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS 1 MIN TYP 2 MAX LIMITS UNIT V OH High-level output voltage V CC ±10%, V IL = MAX, V IH = MIN, I OH = 0.4mA V CC 2 V V = MIN, V = MAX, I OL = 4mA 0.25 0.40 V V OL Low-level output voltage CC IL V IH = MIN I OL = 8mA 0.35 0.50 V V IK Input clamp voltage V CC = MIN, I I = I IK 0.73 1.5 V I I Input current at maximum input voltage V CC = MAX, V I = 7.0V 0.1 ma I IH High-level input current V CC = MAX, V I = 2.7V 20 µa I IL Low-level input current V CC = MAX, V I = 0.5V 0.1 ma I O Output current 3 V CC = MAX, V O = 2.25V -30 112 ma I CC Supply current (total) V CC = MAX 4.0 7.0 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 V CC = 5V, T amb = 25 C. 3. The output conditions have been chosen to produce a current that closely approximate one half of the true short-circuit output current, I OS. AC ELECTRICAL CHARACTERISTICS SYMBOL PARAMETER TEST CONDITION LIMITS T amb = 0 C to +70 C V CC = +5.0V ± 10% C L = 50pF, R L = 500Ω UNIT MIN MAX t PLH t PHL Propagation delay An to Qn Waveform 1, 2 3.0 3.0 10.0 12.0 ns t PLH t PHL Propagation delay En to Qn Waveform 2 3.0 3.0 8.0 8.0 ns AC WAVEFORMS For all waveforms, = 1.3V. An An, En t PHL t PLH t PHL t PLH Qn Qn SF00133 SF00134 Waveform 1. Propagation Delay for Inverting Outputs Waveform 2. Propagation Delay for Non-inverting Outputs 1991 Feb 08 4
TEST CIRCUIT AND WAVEFORMS PULSE GENERATOR V IN V CC D.U.T. V OUT NEGATIVE PULSE 90% 10% t THL ( t ff) t w t TLH ( t r ) 10% 90% AMP (V) 0.3V R T C L R L Test Circuit for Totem-pole Outputs POSITIVE PULSE 10% 90% t TLH ( t r ) t w t THL ( t f ) 90% 10% AMP (V) 0.3V 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 Z OUT of pulse generators. Family 74ALS Input Pulse Definition INPUT PULSE REQUIREMENTS Amplitude 3.5V 1.3V Rep.Rate t w t TLH t THL 1MHz 500ns 2.0ns 2.0ns SC00005 1991 Feb 08 5
DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4 1991 Feb 08 6
SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1 1991 Feb 08 7
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 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. 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 Copyright Philips Electronics North America Corporation 1997 All rights reserved. Printed in U.S.A. 1991 Feb 08 8