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INTEGRATED CIRCUITS
74LVC138A 3-to-8 line decoder/demultiplexer; inverting
Product specification 1998 Apr 28
Philips Semiconductors
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
FEATURES
* Wide supply voltage range of 1.2 to 3.6 V * In accordance with JEDEC standard no. 8-1A * Inputs accept voltages up to 5.5 V * CMOS lower power consumption * Direct interface with TTL levels * Demultiplexing capability * Multiple input enable for easy expansion * Ideal for memory chip select decoding * Active LOW mutually exclusive outputs * Output drive capability 50 W transmission lines at 85C
DESCRIPTION
The 74LVC138A is a low-voltage, low-power, high-performance Si-gate CMOS device, superior to most advanced CMOS compatible TTL families. The 74LVC138A accepts three binary weighted address inputs (A0, A1, A2) and when enabled, provides 8 mutually exclusive active LOW outputs (Y0 to Y7). The 74LVC138A features three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion of the 74LV138A to a 1-of-32 (5 lines to 32 lines) decoder with just four 74LV138A ICs and one inverter. The 74LV138A 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. Unused enable inputs must be permanently tied to their appropriate active HIGH or LOW state.
QUICK REFERENCE DATA
GND = 0 V; Tamb = 25C; tr = tf 2.5 ns SYMBOL tPHL/tPLH CI CPD PARAMETER Propagation delay An to Yn, E3 to Yn, En to Yn Input capacitance Power dissipation capacitance per package VCC = 3.3 V Notes 1 and 2 CONDITIONS CL = 50 pF; VCC = 3.3 V TYPICAL 3.5 3.5 5.0 44 UNIT ns pF pF
NOTES: 1. CPD is used to determine the dynamic power dissipation (PD in W) PD = CPD x VCC2 x fi ) (CL x VCC2 x fo) where: fi = input frequency in MHz; CL = output load capacity in pF; fo = output frequency in MHz; VCC = supply voltage in V; (CL x VCC2 x fo) = sum of the outputs. 2. The condition is VI = GND to VCC
ORDERING INFORMATION
PACKAGES 16-Pin Plastic SO 16-Pin Plastic SSOP Type II 16-Pin Plastic TSSOP Type I TEMPERATURE RANGE -40C to +85C -40C to +85C -40C to +85C OUTSIDE NORTH AMERICA 74LVC138A D 74LVC138A DB 74LVC138A PW NORTH AMERICA 74LVC138A D 74LVC138A DB 74LVC138APW DH PKG. DWG. # SOT109-1 SOT338-1 SOT403-1
PIN CONFIGURATION
A0 A1 A2 E1 E2 E3 Y7 1 2 3 4 5 6 7 16 15 14 13 12 11 10 9 VCC Y0 Y0 Y0 Y0 Y0 Y0 Y0
LOGIC DIAGRAM
1 2 3 A0 A1 A2 Y0 Y1 Y2 Y3 Y4 4 5 6 E1 E2 E3 Y5 Y6 Y7 15 14 13 12 11 10 9 7
GND 8
SV00553
SV00554
1998 Apr 28
2
853-1943 19308
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
PIN DESCRIPTION
PIN NUMBER 1, 2, 3 4, 5 6 SYMBOL A0 to A2 E1, E2 E3 NAME AND FUNCTION Address inputs Enable inputs (active LOW) Enable inputs (active HIGH)
FUNCTIONAL DIAGRAM
Y0 1 2 A1 A2 A3 3-to-8 DECODER ENABLE EXITING Y1 Y2 Y3 Y4 Y5 Y6 Y7
15 14 13 12 11 10 9 7
15, 14, 13, 12, Y0 to Y7 11, 10, 9, 7 8 16 GND VCC
Outputs
3
Ground (0 V) Positive supply voltage
LOGIC SYMBOL (IEEE/IEC)
DX 1 2 3 2 0 0 1 2 3 4 4 5 6 (a) & 5 6 7 15 14 13 12 11 10 9 7 4 5 6 (b) & 1 2 3 1 2 4 X/Y 4 0 1 2 3 4 5
EN 6
E1 E2 E3
15 14 13 12 11 10 9 7
5 6
SV00556
7
SV00555
FUNCTION TABLE
INPUTS E1 H X X L L L L L L L L E2 X H X L L L L L L L L E3 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 Y0 H H H L H H H H H H H Y1 H H H H L H H H H H H Y2 H H H H H L H H H H H OUTPUTS Y3 H H H H H H L H H H H Y4 H H H H H H H L H H H Y5 H H H H H H H H L H H Y6 H H H H H H H H H L H Y7 H H H H H H H H H H L
NOTES: H = HIGH voltage level L = LOW voltage level X = don't care
1998 Apr 28
3
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
RECOMMENDED OPERATING CONDITIONS
LIMITS SYMBOL PARAMETER DC supply voltage (for max. speed performance) VCC VI VI/O Tamb tr, tf DC supply voltage (for low-voltage applications) DC input voltage range DC output voltage range; output HIGH or LOW state DC input voltage range; output 3-State Operating free-air temperature range Input rise and fall times VCC = 1.2 to 2.7V VCC = 2.7 to 3.6V CONDITIONS MIN 2.7 1.2 0 0 0 -40 0 0 MAX 3.6 3.6 5.5 VCC 5.5 +85 20 10 V V V C ns/V UNIT
ABSOLUTE MAXIMUM RATINGS1
In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0V). SYMBOL VCC IIK VI IOK VI/O IO IGND, ICC Tstg PTOT PARAMETER DC supply voltage DC input diode current DC input voltage DC output diode current DC output voltage; output HIGH or LOW DC input voltage; output 3-State DC output source or sink current DC VCC or GND current Storage temperature range Power dissipation per package - plastic mini-pack (SO) - plastic shrink mini-pack (SSOP and TSSOP) above +70C derate linearly with 8 mW/K above +60C derate linearly with 5.5 mW/K VI t 0 Note 2 VO uVCC or VO t 0 Note 2 Note 2 VO = 0 to VCC CONDITIONS RATING -0.5 to +6.5 -50 -0.5 to +6.5 "50 -0.5 to VCC +0.5 -0.5 to 6.5 "50 "100 -65 to +150 500 500 UNIT V mA V mA V mA mA C
mW
NOTES: 1. Stresses beyond those listed may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
1998 Apr 28
4
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
DC ELECTRICAL CHARACTERISTICS
Over recommended operating conditions. Voltages are referenced to GND (ground = 0V). LIMITS SYMBOL PARAMETER TEST CONDITIONS Temp = -40C to +85C MIN VIH HIGH level input voltage VCC = 1.2V VCC = 2.7 to 3.6V LOW level input voltage VCC = 1.2V VCC = 2.7 to 3.6V VCC = 2.7V; VI = VIH or VIL; IO = -12mA VO OH HIGH level output voltage VCC = 3.0V; VI = VIH or VIL; IO = -100A VCC = 3.0V; VI = VIH or VIL; IO = -12mA VCC = 3.0V; VI = VIH or VIL; IO = -24mA VCC = 2.7V; VI = VIH or VIL; IO = 12mA VOL LOW level output voltage VCC = 3.0V; VI = VIH or VIL; IO = 100A VCC = 3.0V; VI = VIH or VIL; IO = 24mA II ICC ICC Input leakage current Quiescent supply current Additional quiescent supply current per input pin VCC = 3 6V; VI = 5 5V or GND 3.6V; 5.5V VCC = 3.6V; VI = VCC or GND; IO = 0 VCC = 2.7V to 3.6V; VI = VCC -0.6V; IO = 0 "0.1 "0 1 0.1 5 GND VCC*0.5 VCC*0.2 VCC*0.6 VCC*1.0 0.40 0.20 0.55 "5 10 500 A A A V VCC V VCC 2.0 GND V 0.8 TYP1 MAX V UNIT
VIL
NOTE: 1. All typical values are at VCC = 3.3V and Tamb = 25C.
AC CHARACTERISTICS
GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF; RL = 500W; Tamb = -40_C to +85_C LIMITS SYMBOL PARAMETER Propagation delay An to Yn Propagation delay E3 to Yn Propagation delay En to Yn WAVEFORM MIN tPHL/tPLH tPHL/tPLH tPHL/tPLH Figure 1, 3 Figure 1, 3 Figure 2, 3 1.5 1.5 1.5 VCC = 3.3V 0.3V TYP1 3.5 3.6 3.5 MAX 5.8 5.8 5.8 VCC = 2.7V MIN 1.5 1.5 1.5 MAX 6.8 6.8 6.8 ns ns ns UNIT
NOTE: 1. These typical values are at VCC = 3.3V and Tamb = 25C.
1998 Apr 28
5
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
AC WAVEFORMS
VM = 1.5 V at VCC w 2.7 V VM = 0.5 S VCC at VCC < 2.7 V VOL and VOH are the typical output voltage drop that occur with the output load.
VCC An, E 3 INPUT GND t PHL VOH Yn OUTPUT V OL VM t PLH VM
TEST CIRCUIT
VCC S1 2 * VCC Open GND
500 VI PULSE GENERATOR RT D.U.T. VO
50pF
CL
500
SWITCH POSITION
TEST tPLH/tPHL S1 Open VCC < 2.7V 2.7-3.6V VI VCC 2.7V
SV00557
Figure 1. Input (nA) to output (nY) propagation delays.
SV00903
V CC E1, E 2 INPUT GND t PHL V OH Y n OUTPUT V OL VM t PLH VM
Figure 3. Load circuitry for switching times.
SV00558
Figure 2. 3-State enable and disable times.
1998 Apr 28
6
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
1998 Apr 28
7
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm
SOT338-1
1998 Apr 28
8
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
1998 Apr 28
9
Philips Semiconductors
Product specification
3-to-8 line decoder/demultiplexer; inverting
74LVC138A
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: 07-98 9397-750-04493
Philips Semiconductors
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