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INTEGRATED CIRCUITS
74F138 1-of-8 decoder/demultiplexer
Product specification IC15 Data Handbook 1991 Feb 14
Philips Semiconductors
Philips Semiconductors
Product specification
1-of-8 decoder/demultiplexer
74F138
FEATURE
* Demultiplexing capability * Multiple input enable for easy expansion * Ideal for memory chip select decoding * Industrial temperature range available (-40C to +85C)
DESCRIPTION
The 74F138 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 74F138s and one inverter (see Figure 1). 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.
PIN CONFIGURATION
A0 A1 A2 E0 E1 E2 Q7 GND 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 VCC Q0 Q1 Q2 Q3 Q4 Q5 Q6
SF00174
TYPE 74F138
TYPICAL PROPAGATION DELAY 5.8ns
TYPICAL SUPPLY CURRENT (TOTAL) 13mA
ORDERING INFORMATION
ORDER CODE DESCRIPTION 16-pin plastic DIP 16-pin plastic SO COMMERCIAL RANGE VCC = 5V 10%, Tamb = 0C to +70C N74F138N N74F138D INDUSTRIAL RANGE VCC = 5V 10%, Tamb = -40C to +85C I74F138N I74F138D PKG DWG # SOT38-4 SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS A0 - A2 E0, E1 E2 Q0 - Q7 Address inputs Enable inputs (active Low) Enable input (active High) Data outputs DESCRIPTION 74F (U.L.) HIGH/LOW 1.0/1.0 1.0/1.0 1.0/1.0 50/33 LOAD VALUE HIGH/LOW 20A/0.6mA 20A/0.6mA 20A/0.6mA 1.0mA/20mA
NOTE: One (1.0) FAST unit load is defined as: 20A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
1 2 3
IEC/IEEE SYMBOL
DMUX
0 2 G A0 A1 A2 3 2 0 3 0 1 2 3 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 4 5 15 14 13 12 11 10 9 7 6 4 14 13 12 11
1
15
4 5 6
E0 E1 E2
&
5 6 7
10 9 7
VCC = Pin 16 GND = Pin 8
SF00175
SF00176
February 14, 1991
2
853-0343 01719
Philips Semiconductors
Product specification
1-of-8 decoder/demultiplexer
74F138
LOGIC DIAGRAM
A2 A1 3
2
A0
1
E0 E1 E2
4 5 6 15 14 13 12 11 10 9 Q1 Q2 Q3 Q4 Q5 Q6 Q0 7 Q7
VCC = Pin 16 GND = Pin 8
SF00177
FUNCTION TABLE
INPUTS E0 H X X L L L L L L L L E1 X H X L L L L L L L L E2 X X L H H H H H H H H A0 X X X L H L H L H L H A1 X X X L L H H L L H H A2 X X X L L L L H H H H Q0 H H H L H H H H H H H Q1 H H H H L H H H H H H Q2 H H H H H L H H H H H OUTPUTS Q3 H H H H H H L H H H H Q4 H H H H H H H L H H H Q5 H H H H H H H H L H H Q6 H H H H H H H H H L H Q7 H H H H H H H H H H L
NOTES: H = High voltage level L = Low voltage level X = Don't care
APPLICATION
A0 A1 A2 A3 A4 H E2 E1 E0 A0 A1 A2 E2 E1 E0 A0 A1 A2 E2 E1 E0 A0 A1 A2
74F04
E2 E1 E0 A0 A1 A2
74F138
74F138
74F138
74F138
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
Q0
Q31
SF00178
Figure 1. Expansion of 1-of-8 Decoding
February 14, 1991
3
Philips Semiconductors
Product specification
1-of-8 decoder/demultiplexer
74F138
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 VCC VIN IIN VOUT IOUT Tamb Tstg Supply voltage Input voltage Input current Voltage applied to output in High output state Current applied to output in Low output state Commercial range Operating free-air temperature range free air Storage temperature range Industrial range PARAMETER RATING -0.5 to +7.0 -0.5 to +7.0 -30 to +5 -0.5 to VCC 40 0 to +70 -40 to +85 -65 to +150 UNIT V V mA V mA C C C
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL VCC VIH VIL IIK IOH IOL Tamb b Supply voltage High-level input voltage Low-level input voltage Input clamp current High-level output current Low-level output current O erating Operating free-air tem erature range temperature Commercial range Industrial range 0 -40 PARAMETER MIN 4.5 2.0 0.8 -18 -1 20 +70 +85 NOM 5.0 MAX 5.5 UNIT V V V mA mA mA C C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.) SYMBOL PARAMETER TEST CONDITIONS1 VCC = MIN, VIL = MAX, , , VIH = MIN VCC = MIN, VIL = MAX, , , VIH = MIN VCC = MIN, II = IIK VCC = MAX, VI = 7.0V VCC = MAX, VI = 2.7V VCC = MAX, VI = 0.5V VCC = MAX VCC = MAX -60 13 LIMITS MIN TYP2 MAX UNIT V 3.4 0.30 0.30 -0.73 0.50 0.50 -1.2 100 20 -0.6 -150 20 V V V V A A mA mA mA
VO OH
High-level High level output voltage
IO = MAX OH
10%VCC 5%VCC 10%VCC 5%VCC
2.5 2.7
VO OL VIK II IIH IIL IOS ICC
Low-level Low level output voltage Input clamp voltage Input current at maximum input voltage High-level input current Low-level input current Short-circuit output current3 Supply current4 (total)
IO = MAX OL
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 = 25C. 3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any sequence of parameter tests, IOS tests should be performed last. 4. Measure ICC, outputs must be open, VIN on all inputs = 4.5V.
February 14, 1991
4
Philips Semiconductors
Product specification
1-of-8 decoder/demultiplexer
74F138
AC ELECTRICAL CHARACTERISTICS
LIMITS TEST CONDITION VCC = +5.0V Tamb = +25C CL = 50pF RL = 500 MIN tPLH tPHL tPLH tPHL tPLH tPHL Propagation delay An to Qn Propagation delay E0 or E1 to Qn Propagation delay E2 to Qn Waveform 1, 2 Waveform 2 Waveform 1 3.5 4.0 3.5 3.0 4.0 3.5 TYP 5.6 6.1 6.4 5.3 6.2 5.6 MAX 7.0 8.0 7.0 7.0 8.0 7.5 VCC = +5.0V 10% Tamb = 0C to +70C CL = 50pF RL = 500 MIN 3.5 4.0 3.5 3.0 4.0 3.5 MAX 8.0 9.0 8.0 7.5 9.0 8.5 VCC = +5.0V 10% Tamb = -40C to +85C CL = 50pF RL = 500 MIN 3.0 3.5 3.0 3.0 4.0 3.5 MAX 8.5 9.0 8.0 7.5 9.5 8.5 ns ns ns
SYMBOL
PARAMETER
UNIT
AC WAVEFORMS
For all waveforms, VM = 1.5V
An, E2
VM tPHL
VM tPLH
An, E0, E1
VM tPHL
VM tPLH
Qn
VM
VM
Qn
VM
VM
SF00179
SF00180
Waveform 1. Propagation Delay for Inverting Outputs
Waveform 2.
Propagation Delay for Non-Inverting Outputs
TEST CIRCUIT AND WAVEFORMS
VCC NEGATIVE PULSE VIN PULSE GENERATOR RT D.U.T. VOUT 90% VM 10% tTHL (tf ) CL RL tw VM 10% tTLH (tr ) 0V 90% AMP (V)
tTLH (tr ) 90% POSITIVE PULSE VM 10% tw
tTHL (tf ) AMP (V) 90% VM 10% 0V
Test Circuit for Totem-Pole Outputs 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.
Input Pulse Definition INPUT PULSE REQUIREMENTS family amplitude VM 74F 3.0V 1.5V rep. rate 1MHz tw 500ns tTLH 2.5ns tTHL 2.5ns
SF00006
February 14, 1991
5
Philips Semiconductors
Product specification
1-of-8 decoder/demultiplexer
74F138
DIP16: plastic dual in-line package; 16 leads (300 mil)
SOT38-4
1991 Feb 14
6
Philips Semiconductors
Product specification
1-of-8 decoder/demultiplexer
74F138
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1991 Feb 14
7
Philips Semiconductors
Product specification
1-of-8 decoder/demultiplexer
74F138
Data sheet status
Data sheet status Objective specification Preliminary specification Product specification Product status Development Qualification Definition [1] This data sheet contains the design target or goal specifications for product development. Specification 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 chages 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.
Production
[1] Please consult the most recently issued datasheet before initiating or completing a design.
Definitions
Short-form specification -- The data in a short-form specification is extracted from a full data sheet with the same type number and title. For detailed information see the relevant data sheet or data handbook. Limiting values definition -- Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended periods may affect device reliability. Application information -- Applications that are described herein for any of these products are for illustrative purposes only. Philips Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or modification.
Disclaimers
Life support -- These products are not designed for use in life support appliances, devices or systems where malfunction of these products can reasonably be expected to result in personal injury. Philips Semiconductors customers using or selling these products for use in such applications do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application. Right to make changes -- Philips Semiconductors reserves 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. Philips Semiconductors 811 East Arques Avenue P.O. Box 3409 Sunnyvale, California 94088-3409 Telephone 800-234-7381 (c) Copyright Philips Electronics North America Corporation 1998 All rights reserved. Printed in U.S.A. print code Document order number: Date of release: 10-98 9397-750-05076
Philips Semiconductors
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