INTEGRATED CIRCUITS 74LVC138A 3-to-8 line decoder/demultiplexer; inverting Product specification 1998 Apr 28 Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting FEATURES 74LVC138A DESCRIPTION • 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 transmission lines at 85°C 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 = 25°C; tr = tf ≤ 2.5 ns PARAMETER SYMBOL tPHL/tPLH Propagation delay An to Yn, E3 to Yn, En to Yn CI Input capacitance Power dissipation capacitance per package CPD CONDITIONS TYPICAL UNIT 3.5 3.5 ns 5.0 pF 44 pF CL = 50 pF; VCC = 3.3 V VCC = 3.3 V Notes 1 and 2 NOTES: 1. CPD is used to determine the dynamic power dissipation (PD in µW) PD = CPD × VCC2 × fi (CL × VCC2 × fo) where: fi = input frequency in MHz; CL = output load capacity in pF; fo = output frequency in MHz; VCC = supply voltage in V; (CL × VCC2 × fo) = sum of the outputs. 2. The condition is VI = GND to VCC ORDERING INFORMATION PACKAGES TEMPERATURE RANGE OUTSIDE NORTH AMERICA NORTH AMERICA PKG. DWG. # 16-Pin Plastic SO –40°C to +85°C 74LVC138A D 74LVC138A D SOT109-1 16-Pin Plastic SSOP Type II –40°C to +85°C 74LVC138A DB 74LVC138A DB SOT338-1 16-Pin Plastic TSSOP Type I –40°C to +85°C 74LVC138A PW 74LVC138APW DH SOT403-1 PIN CONFIGURATION A0 1 LOGIC DIAGRAM 16 VCC A1 2 15 Y0 A2 3 14 Y0 E1 4 13 Y0 E2 5 12 Y0 E3 6 11 Y0 7 10 Y0 GND 8 9 Y0 Y7 A0 Y0 15 2 A1 Y1 14 3 A2 Y2 13 Y3 12 Y4 11 4 5 6 SV00553 1998 Apr 28 1 E1 E2 E3 Y5 10 Y6 9 Y7 7 SV00554 2 853–1943 19308 Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting PIN DESCRIPTION PIN NUMBER 74LVC138A FUNCTIONAL DIAGRAM SYMBOL NAME AND FUNCTION 1, 2, 3 A0 to A2 Address inputs 4, 5 E1, E2 Enable inputs (active LOW) 6 E3 Enable inputs (active HIGH) 1 A1 2 A2 3 A3 Y0 15 Y1 14 Y2 13 Y3 12 Y4 11 15, 14, 13, 12, Y0 to Y7 11, 10, 9, 7 Outputs 8 GND Ground (0 V) Y5 10 16 VCC Positive supply voltage Y6 9 Y7 7 3-to-8 DECODER ENABLE EXITING LOGIC SYMBOL (IEEE/IEC) DX 1 0 2 3 4 2 & 5 6 X/Y 0 15 1 14 1 1 2 13 2 2 3 12 3 4 4 11 5 10 6 9 7 7 4 5 & E1 15 5 E2 1 14 6 E3 2 13 3 12 4 11 5 10 EN 6 9 7 7 6 (a) 4 0 SV00556 (b) SV00555 FUNCTION TABLE INPUTS OUTPUTS E1 E2 E3 A0 A1 A2 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 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 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 VCC VI VI/O Tamb tr, tf PARAMETER CONDITIONS MIN MAX DC supply voltage (for max. speed performance) 2.7 3.6 DC supply voltage (for low-voltage applications) 1.2 3.6 UNIT V DC input voltage range 0 5.5 DC output voltage range; output HIGH or LOW state 0 VCC DC input voltage range; output 3-State 0 5.5 –40 +85 °C 0 0 20 10 ns/V Operating free-air temperature range VCC = 1.2 to 2.7V VCC = 2.7 to 3.6V Input rise and fall times V V ABSOLUTE MAXIMUM RATINGS1 In accordance with the Absolute Maximum Rating System (IEC 134). Voltages are referenced to GND (ground = 0V). SYMBOL VCC PARAMETER CONDITIONS DC supply voltage RATING UNIT –0.5 to +6.5 V IIK DC input diode current VI t 0 –50 mA VI DC input voltage Note 2 –0.5 to +6.5 V IOK DC output diode current VO uVCC or VO t 0 "50 mA DC output voltage; output HIGH or LOW Note 2 –0.5 to VCC +0.5 DC input voltage; output 3-State Note 2 –0.5 to 6.5 DC output source or sink current VO = 0 to VCC VI/O IO IGND, ICC Tstg PTOT DC VCC or GND current Storage temperature range Power dissipation per package – plastic mini-pack (SO) – plastic shrink mini-pack (SSOP and TSSOP) above +70°C derate linearly with 8 mW/K above +60°C derate linearly with 5.5 mW/K V "50 mA "100 mA –65 to +150 °C 500 500 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 = -40°C to +85°C TYP1 MIN VIH HIGH level input voltage VIL LOW level input voltage VOH O VCC = 1.2V VCC VCC = 2.7 to 3.6V 2.0 V VCC = 1.2V GND V VCC = 2.7 to 3.6V HIGH level output voltage 0.8 VCC = 2.7V; VI = VIH or VIL; IO = –12mA VCC*0.5 VCC = 3.0V; VI = VIH or VIL; IO = –100µA VCC*0.2 VCC = 3.0V; VI = VIH or VIL; IO = –12mA VCC*0.6 VCC = 3.0V; VI = VIH or VIL; IO = –24mA VCC*1.0 VCC V VCC = 2.7V; VI = VIH or VIL; IO = 12mA VOL LOW level output voltage 0.40 VCC = 3.0V; VI = VIH or VIL; IO = 100µA GND 0.20 VCC = 3.0V; VI = VIH or VIL; IO = 24mA II ICC ∆ICC UNIT MAX Input leakage current VCC = 3 3.6V; 6V; VI = 5 5.5V 5V or GND Quiescent supply current VCC = 3.6V; VI = VCC or GND; IO = 0 Additional quiescent supply current per input pin VCC = 2.7V to 3.6V; VI = VCC –0.6V; IO = 0 V 0.55 "0 1 "0.1 "5 µA 0.1 10 µA 5 500 µA NOTE: 1. All typical values are at VCC = 3.3V and Tamb = 25°C. AC CHARACTERISTICS GND = 0 V; tr = tf v 2.5 ns; CL = 50 pF; RL = 500; Tamb = –40C to +85C LIMITS SYMBOL PARAMETER VCC = 3.3V ±0.3V WAVEFORM VCC = 2.7V MIN TYP1 MAX MIN MAX UNIT tPHL/tPLH Propagation delay An to Yn Figure 1, 3 1.5 3.5 5.8 1.5 6.8 ns tPHL/tPLH Propagation delay E3 to Yn Figure 1, 3 1.5 3.6 5.8 1.5 6.8 ns tPHL/tPLH Propagation delay En to Yn Figure 2, 3 1.5 3.5 5.8 1.5 6.8 ns NOTE: 1. These typical values are at VCC = 3.3V and Tamb = 25°C. 1998 Apr 28 5 Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting AC WAVEFORMS 74LVC138A TEST CIRCUIT VM = 1.5 V at VCC 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. S1 VCC 2 * VCC Open GND 500Ω VO VI VCC An, E 3 PULSE GENERATOR VM INPUT D.U.T. 50pF RT GND t PHL CL 500Ω t PLH VOH Yn OUTPUT SWITCH POSITION VM TEST V OL tPLH/tPHL SV00557 Figure 1. Input (nA) to output (nY) propagation delays. S1 Open VCC VI < 2.7V VCC 2.7–3.6V 2.7V SV00903 Figure 3. Load circuitry for switching times. V CC E1, E 2 INPUT VM GND t PHL t PLH V OH Y n OUTPUT VM V OL SV00558 Figure 2. 3-State enable and disable times. 1998 Apr 28 6 Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting SO16: plastic small outline package; 16 leads; body width 3.9 mm 1998 Apr 28 7 74LVC138A SOT109-1 Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm 1998 Apr 28 8 74LVC138A SOT338-1 Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm 1998 Apr 28 9 74LVC138A SOT403-1 Philips Semiconductors Product specification 3-to-8 line decoder/demultiplexer; inverting 74LVC138A Data sheet status Data sheet status Product status Definition [1] Objective specification Development This data sheet contains the design target or goal specifications for product development. Specification may change in any manner without notice. Preliminary specification Qualification 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. Product specification 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. [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. Copyright Philips Electronics North America Corporation 1998 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 print code Document order number: yyyy mmm dd 10 Date of release: 07-98 9397-750-04493