DM74LS138 DM74LS139 Decoder/Demultiplexer

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DM74LS138 DM74LS139 Decoder/Demultiplexer General Description These Schottky-clamped circuits are designed to be used in high-performance memory-decoding or data-routing applications, requiring very

1 DM74LS138 DM74LS139 Decoder/Demultiplexer General Description These Schottky-clamped circuits are designed to be used in high-performance memory-decoding or data-routing applications, requiring very short propagation delay times. In high-performance memory systems these decoders can be used to minimize the effects of system decoding. When used with high-speed memories, the delay times of these decoders are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoder is negligible. The DM74LS138 decodes one-of-eight lines, based upon the conditions at the three binary select inputs and the three enable inputs. Two active-low and one active-high enable inputs reduce the need for external gates or inverters when expanding. A 24-line decoder can be implemented with no external inverters, and a 32-line decoder requires only one inverter. An enable input can be used as a data input for demultiplexing applications. The DM74LS139 comprises two separate two-line-to-fourline decoders in a single package. The active-low enable input can be used as a data line in demultiplexing applications. All of these decoders/demultiplexers feature fully buffered inputs, presenting only one normalized load to its driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line-ringing and simplify system design. Features August 1986 Revised March 2000 Designed specifically for high speed: Memory decoders Data transmission systems DM74LS138 3-to-8-line decoders incorporates 3 enable inputs to simplify cascading and/or data reception DM74LS139 contains two fully independent 2-to-4-line decoders/demultiplexers Schottky clamped for high performance Typical propagation delay (3 levels of logic) DM74LS ns DM74LS ns Typical power dissipation DM74LS mw DM74LS mw DM74LS138 DM74LS139 Decoder/Demultiplexer Ordering Code: Order Number Package Number Package Description DM74LS138M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, Narrow DM74LS138SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74LS138N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, Wide DM74LS139M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, Narrow DM74LS139SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74LS139N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, Wide Devices also available in Tape and Reel. Specify by appending the suffix letter X to the ordering code Fairchild Semiconductor Corporation DS

2 DM74LS138 DM74LS139 Connection Diagrams DM74LS138 DM74LS139 Function Tables DM74LS138 Inputs Enable Select Outputs G1 G2 (Note 1) C B A YO Y1 Y2 Y3 Y4 Y5 Y6 Y7 X H X X X H H H H H H H H L X X X X H H H H H H H H H L L L L L H H H H H H H H L L L H H L H H H H H H H L L H L H H L H H H H H H L L H H H H H L H H H H H L H L L H H H H L H H H H L H L H H H H H H L H H H L H H L H H H H H H L H H L H H H H H H H H H H L H = HIGH Level L = LOW Level X = Don t Care Note 1: G2 = G2A + G2B DM74LS139 Inputs Enable Select Outputs G B A Y0 Y1 Y2 Y3 H X X H H H H L L L L H H H L L H H L H H L H L H H L H L H H H H H L Logic Diagrams DM74LS138 DM74LS

3 Absolute Maximum Ratings(Note 2) Supply Voltage 7V Input Voltage 7V Operating Free Air Temperature Range 0 C to +70 C Storage Temperature Range 65 C to +150 C DM74LS138 Recommended Operating Conditions Note 2: The Absolute Maximum Ratings are those values beyond which the safety of the device cannot be guaranteed. The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The Recommended Operating Conditions table will define the conditions for actual device operation. Symbol Parameter Min Nom Max Units V CC Supply Voltage V V IH HIGH Level Input Voltage 2 V V IL LOW Level Input Voltage 0.8 V I OH HIGH Level Output Current 0.4 ma I OL LOW Level Output Current 8 ma T A Free Air Operating Temperature 0 70 C DM74LS138 DM74LS139 DM74LS138 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Typ Symbol Parameter Conditions Min (Note 3) Max Units V I Input Clamp Voltage V CC = Min, I I = 18 ma 1.5 V V OH HIGH Level Output Voltage V CC = Min, I OH = Max, V IL = Max, V IH = Min V V OL LOW Level V CC = Min, I OL = Max, V IL = Max, V IH = Min Output Voltage I OL = 4 ma, V CC = Min V I I Input Max Input Voltage V CC = Max, V I = 7V 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 = 0.4V 0.36 ma I OS Short Circuit Output Current V CC = Max (Note 4) ma I CC Supply Current V CC = Max (Note 5) ma Note 3: All typicals are at V CC = 5V, T A = 25 C. Note 4: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 5: I CC is measured with all outputs enabled and OPEN. DM74LS138 Switching Characteristics at V CC = 5V and T A = 25 C From (Input) Levels R L = 2 kω Symbol Parameter To (Output) of Delay C L = 15 pf C L = 50 pf Units Min Max Min Max t PLH Propagation Delay Time LOW-to-HIGH Level Output Select to Output ns t PHL Propagation Delay Time HIGH-to-LOW Level Output Select to Output ns t PLH Propagation Delay Time LOW-to-HIGH Level Output Select to Output ns t PHL Propagation Delay Time HIGH-to-LOW Level Output Select to Output ns t PLH Propagation Delay Time LOW-to-HIGH Level Output Enable to Output ns t PHL Propagation Delay Time HIGH-to-LOW Level Output Enable to Output ns t PLH Propagation Delay Time LOW-to-HIGH Level Output Enable to Output ns t PHL Propagation Delay Time HIGH-to-LOW Level Output Enable to Output ns 3

4 DM74LS138 DM74LS139 DM74LS139 Recommended Operating Conditions Symbol Parameter Min Nom Max Units V CC Supply Voltage V V IH HIGH Level Input Voltage 2 V V IL LOW Level Input Voltage 0.8 V I OH HIGH Level Output Current 0.4 ma I OL LOW Level Output Current 8 ma T A Free Air Operating Temperature 0 70 C DM74LS139 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Typ Symbol Parameter Conditions Min (Note 6) Max Units V I Input Clamp Voltage V CC = Min, I I = 18 ma 1.5 V V OH HIGH Level V CC = Min, I OH = Max, Output Voltage V IL = Max, V IH = Min V V OL LOW Level V CC = Min, I OL = Max Output Voltage V IL = Max, V IH = Min V I OL = 4 ma, V CC = Min I I Input Max Input Voltage V CC = Max, V I = 7V 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 = 0.4V 0.36 ma I OS Short Circuit Output Current V CC = Max (Note 7) ma I CC Supply Current V CC = Max (Note 8) ma Note 6: All typicals are at V CC = 5V, T A = 25 C. Note 7: Not more than one output should be shorted at a time, and the duration should not exceed one second. Note 8: I CC is measured with all outputs enabled and OPEN. DM74LS139 Switching Characteristics at V CC = 5V and T A = 25 C From (Input) R L = 2 kω Symbol Parameter To (Output) C L = 15 pf C L = 50 pf Units Min Max Min Max t PLH Propagation Delay Time LOW-to-HIGH Level Output Select to Output ns t PHL Propagation Delay Time HIGH-to-LOW Level Output Select to Output ns t PLH Propagation Delay Time LOW-to-HIGH Level Output Enable to Output ns t PHL Propagation Delay Time HIGH-to-LOW Level Output Enable to Output ns 4

5 Physical Dimensions inches (millimeters) unless otherwise noted DM74LS138 DM74LS Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, Narrow Package Number M16A 5

6 DM74LS138 DM74LS139 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide Package Number M16D 6

7 Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, Wide Package Number N16E DM74LS138 DM74LS139 Decoder/Demultiplexer Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. LIFE SUPPORT POLICY FAIRCHILD S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury to the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness

8 This datasheet has been downloaded from: Datasheets for electronic components.

9 3 TO 8 LINE DECODER DEMULTIPLEXER Description Pin Assignments The is a high speed CMOS device. The device accepts a three bit binary weighted address on input pins A0, A1 and A2 and when enabled will produce one active low output with the remaing seven being high. There are two active LOW enable inputs E1 and E2, and one active HIGH enable input E3. The disabled device state results in all outputs being high. The enable state occurs with E1 and E2 asserted low and E3 asserted high. The multiple enable lines allow for the parallel expansion of decoders to create 4-to-16 line versions with no additional parts and 5-to-32 versions with the addition of a single inverter. Features Wide Supply Voltage Range from 2.0V to 6.0V Sinks or sources 8 ma at V CC = 4.5V CMOS low power consumption Schmitt Trigger Action at All Inputs Inputs Accept up to 6.0V ESD Protection Tested per JESD 22 Exceeds 200-V Machine Model (A115-A) Exceeds 2000-V Human Body Model (A114-A) Exceeds 1000-V Charged Device Model (C101C) Latch-Up Exceeds 100mA per JESD 78D, Class II Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. Green Device (Note 3) Applications Memory chip select decoding Demultiplexing Single line peripheral control Allow simple serial bit streams from a microcontroller to control as many peripheral lines as needed Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See for more information about Diodes Incorporated s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and <1000ppm antimony compounds. Click here for ordering information, located at the end of datasheet 1 of 10

10 Pin Descriptions Pin Number Pin Name Description 1 A0 Address Input 0 2 A1 Address Input 1 3 A2 Address Input 2 4 E1 Enable Input 1 (active LOW) 5 E2 Enable Input 2 (active LOW) 6 E3 Enable Input 3 (active HIGH) 7 Y7 Output 7 (active LOW) 8 GND Ground 9 Y6 Output 6 (active LOW) 10 Y5 Output 5 (active LOW) 11 Y4 Output 4 (active LOW) 12 Y3 Output 3 (active LOW) 13 Y2 Output 2 (active LOW) 14 Y1 Output 1 (active LOW) 15 Y0 Output o (active LOW) 16 Vcc Supply Voltage Function Table Diagram Control Input Output E1 E2 E3 A2 A1 A0 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 H X X X X X H H H H H H H H X H X X X L L L H L L L H H H H H H H L L L H H H H H H H L H L H L H H H H H L H H L H H H H H H L H H H H L L H H H L H H H H H L H H H L H H H H H H H L H L H H H H H H H H H L H H H H H H H 2 of 10

11 Logic Diagram 3 of 10

12 Absolute Maximum Ratings (Note 4) A = +25 C, unless otherwise specified.) Symbol Description Rating Unit ESD HBM Human Body Model ESD Protection 2 kv ESD CDM Charged Device Model ESD Protection 1 kv ESD MM Machine Model ESD Protection 200 V V CC Supply Voltage Range -0.5 to +7.0 V V I Input Voltage Range -0.5 to +7.0 V V o Voltage applied to output in high or low state -0.3 to V CC +0.5 V I IK Input Clamp Current V I < -0.5V -20 ma I IK Input Clamp Current VI > V CC +0.5V 20 ma I OK Output Clamp Current V O <-0.5V -20 ma I OK Output Clamp Current V O > V CC + 0.5V 20 ma I O Continuous output current ±25 ma I CC Continuous current through V CC 50 ma I GND Continuous current through GND -50 ma T J Operating Junction Temperature -40 to +150 C T STG Storage Temperature -65 to +150 C P TOT Total Power Dissipation 500 mw Note: 4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should be within recommend values. Recommended Operating Conditions (Note 5) (@T A = +25 C, unless otherwise specified.) Symbol Parameter Conditions Min Max Unit V CC Supply Voltage V V I Input Voltage 0 V CC V V O Output Voltage Active Mode 0 V CC V V CC = 2.0V 1000 t/ V Input transition Rise or Fall Rate V CC = 4.5V 500 ns/v V CC = 6.0V 400 T A Operating Free-Air Temperature C Note: 5. Unused inputs should be held at V CC or Ground. 4 of 10

13 Electrical Characteristics A = +25 C, unless otherwise specified.) Symbol Parameter Test Conditions V CC V IH V IL V OH V OL High-Level Input Voltage Low-Level Input Voltage High-Level Output Voltage Low-Level Output Voltage T A = +25 C T A = -40 C to +85 C T A = -40 C to +125 C Min Typ Max Min Max Min Max 2.0V V V V V V I OH = -20 μa All outputs 2.0V V V I OH = -4 ma 4.5V I OH = -5.2 ma 6.0V I OL = 20 μa All outputs 2.0V V V I OL = 4 ma 4.5V I OL = 5.2 ma 6.0V I I Input Current V I =GND or 6.0V 6.0V ±0.1 ± 1 ± 1 μa Unit V V V V I CC C i Supply Current Input Capacitance V I = GND or V CC I O = 0 6.0V μa V i = V CC or GND 6.0V pf Switching Characteristics Symbol / Parameter t PLH, t PLH Propagation Delay t TLH, t THL Transition Time Pins Test Conditions V CC T A = +25 C -40 C to +85 C -40 C to +125 C Min Typ Max Min Max Min Max 2.0V An to Yn Figure 1 4.5V V V V E3 to Yn Figure 1 4.5V V V V En to Yn Figure 1 4.5V V V V Yn Figure 1 5.0V V Unit ns ns 5 of 10

14 Operating Characteristics A = +25 C, unless otherwise specified.) C pd Parameter Power dissipation capacitance Test Conditions V CC = 5V Typ Unit f = 1 MHz all outputs switching-no load 19 pf Parameter Measurement Information Vcc Inputs V I t r /t f V M C L 2.0V -6.0V V CC 6 ns V CC /2 50pF 5.0V V CC 6 ns V CC /2 15pF used for 5V typical test Voltage Waveform Pulse Duration Voltage Waveform Propagation Delay Times Inverting and Non Inverting Outputs Notes: A. Includes test lead and test apparatus capacitance. B. All pulses are supplied at pulse repetition rate 10 MHz. C. Inputs are measured separately one transition per measurement D. t PLH and t PHL are the same as t PD Figure 1 Load Circuit and Voltage Waveforms 6 of 10

15 Ordering Information Part Number Package Code Packaging 7 Tape and Reel (Note 6) Quantity Part Number Suffix S16-13 S16 SO /Tape & Reel -13 T16-13 T16 TSSOP /Tape & Reel -13 Notes: 6. The taping orientation is located on our website at Marking Information (1) SO-16, TSSOP16 Part Number S16 T16 Package SO-16 TSSOP-16 7 of 10

16 Package Outline Dimensions (All dimensions in mm.) Please see AP02002 at for latest version. Package Type: SO-16 E D A2 B e A1 H A C Gauge Plane L Detail A Detail A SO-16 Dim Min Max A A A B C D E e 1.27 Typ H L Θ 0 8 All Dimensions in mm Package Type: TSSOP-16 E/2 E Y X PIN 1 e Ø0.760Depth0.050±0.02 A2 D A A1 SEE DETAIL 'A' E1 b C SEATING PLANE x) R1 R L L1 L2 GAUGE PLANE TSSOP-16 Dim Min Max Typ A A A b c D E 6.40 BSC E e 0.65 BSC L L REF L BSC R R X Y Θ Θ Θ All Dimensions in mm DETAIL 'A' 8 of 10

17 Suggested Pad Layout Please see AP02001 at for the latest version. Package Type: SO-16 X1 Y1 Y Dimensions Value (in mm) C X X Y Y Pin 1 X C Package Type: TSSOP-16 X1 Y1 Y (16x) Dimensions Value (in mm) C X X Y Y X (16x) 1 C 9 of 10

18 IMPORTANT NOTICE DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION). Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated website, harmless against all damages. Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel. Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized application. Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may also be covered by one or more United States, international or foreign trademarks. This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated. LIFE SUPPORT Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of the Chief Executive Officer of Diodes Incorporated. As used herein: A. Life support devices or systems are devices or systems which: 1. are intended to implant into the body, or 2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected to result in significant injury to the user. B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or to affect its safety or effectiveness. Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems. Copyright 2013, Diodes Incorporated 10 of 10

19 This datasheet has been downloaded from: Datasheets for electronic components.

DM74LS08 Quad 2-Input AND Gates

DM74LS08 Quad 2-Input AND Gates General Description This device contains four independent gates each of which performs the logic AND function. Ordering Code: August 1986 Revised March 2000 Order Number