74ALS138

74ALS138 PHILIPS | Alldatasheet

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/C0109 /C0110 /C0114 74ALS138 1-of-8 decoder/demultiplexer Product specification 1996 Jul 03 INTEGRATED CIRCUITS IC05 Data Handbook

Philips Semiconductors Product specification 74ALS1381-of-8 decoder/demultiplexer

21996 Jul 03 853–1848 17016

FEATURES

• Demultiplexing capability
• Multiple input enable for easy expansion
• Ideal for memory chip select decoding

DESCRIPTION

The 74ALS138 decoder accepts three binary weighted inputs (A0, A1, A2) and when enabled, provides eight mutually exclusive, active-Low outputs (Q0 – Q7). The device features three Enable inputs; two active-Low (E0, E1) and one active-High (E2). Every output will be High unless E0 and E1 are Low and E2 is High. This multiple enable function allows easy parallel expansion of the device to 1-of-32 (5 lines to 32 lines) decoder with just four 74ALS138s and one inverter. The device can be used as an eight output demultiplexer by using one of the active-Low Enable inputs as the data input and the remaining Enable inputs as strobes. Enable inputs not used must be permanently tied to their appropriate active-High or active-Low state. TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74ALS138 12.0ns 4.0mA PIN CONFIGURATION 107 Q 7 VCC Q 3 Q 4 Q 5 Q 2 Q 0 Q 1 98GND Q 6 SF00174

ORDERING INFORMATION

DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C DRAWING NUMBER 16-pin plastic DIP 74ALS138N SOT38-4 16-pin plastic SO 74ALS138D SOT109-1 INPUT AND OUTPUT LOADING AND FAN-OUT TABLE PINS DESCRIPTION 74ALS (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW A0 – A2 Address inputs 1.0/1.0 20µA/0.1mA E0, E1 Enable inputs (active-Low) 1.0/1.0 20µA/0.1mA E2 Enable input (active-High) 1.0/1.0 20µA/0.1mA Q 0 – Q7 Data outputs (active-Low) 50/33 1.0mA/20mA NOTE: One (1.0) ALS unit load is defined as: 20µA in the High state and 0.1mA in the Low state. LOGIC SYMBOL A1 A2A0 Q2 Q3 Q4 Q5 13 12 11 10 12 3 VCC = Pin 16 GND = Pin 8 SF00175 IEC/IEEE SYMBOL SC00047 DX1 0 0 G 0

Philips Semiconductors Product specification 74ALS1381-of-8 decoder/demultiplexer

1996 Jul 03 3

VCC = Pin 16 GND = Pin 8 SF00177 FUNCTION TABLE INPUTS OUTPUTS E0 E1 E2 A0 A1 A2 Q 0 Q 1 Q 2 Q 3 Q 4 Q 5 Q 6 Q7 H X X X X X H H H H H H H H X H X X X X H H H H H H H H X X L X X X H H H H H H H H L L H L L L L H H H H H H H L L H H L L H L H H H H H H L L H L H L H H L H H H H H L L H H H L H H H L H H H H L L H L L H H H H H L H H H L L H H L H H H H H H L H H L L H L H H H H H H H H L H L L H H H H H H H H H H H L H = High voltage level L = Low voltage level X = Don’t care

Philips Semiconductors Product specification 74ALS1381-of-8 decoder/demultiplexer

1996 Jul 03 4

(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 16 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 –0.4 mA IOL Low-level output current 8 mA Tamb Operating free-air temperature range 0 +70 °C 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 VOH High-level output voltage VCC = ±10%, VIL = MAX, VIH = MIN IOH = –0.4mA VCC – 2 V VO Low level output voltage VCC = MIN, VIL = MAX, IOL = 4mA 0.25 0.40 V VOL Low-level output voltage CC , IL , VIH = MIN IOL = 8mA 0.35 0.50 V VIK Input clamp voltage VCC = MIN, II = IIK –0.73 –1.5 V II Input current at maximum input voltage VCC = 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 IO Output current3 VCC = MAX, VO = 2.25V –30 –112 mA ICC Supply current (total) VCC = MAX 4 7 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 74ALS1381-of-8 decoder/demultiplexer

1996 Jul 03 5

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 An to Qn Waveform 1, 2 3.0 3.0 22.0 18.0 ns tPLH tPHL Propagation delay E 1, E2 to Qn Waveform 2 3.0 3.0 17.0 17.0 ns tPLH tPHL Propagation delay to Qn Waveform 1 3.0 3.0 17.0 17.0 ns AC WAVEFORMS For all waveforms, VM = 1.3V. VMVM VMVM Q n An, E2 tPHL tPLH SF00179 Waveform 1. Propagation Delay for Inverting Outputs VMVM VMVM Q n An, E0, E1 tPHL tPLH SF00180 Waveform 2. Propagation Delay for Non-inverting Outputs 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 Totem-pole 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 SC00005

Philips Semiconductors Product specification 74ALS1381-of-8 decoder/demultiplexer

1996 Jul 03 6

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

Philips Semiconductors Product specification 74ALS1381-of-8 decoder/demultiplexer

1996 Jul 03 7

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

Philips Semiconductors Product specification 74ALS1381-of-8 decoder/demultiplexer

1996 Jul 03 8

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