74VHC139 Dual 2-to-4 Decoder/Demultiplexer General Description Features The VHC139 is an advanced high speed CMOS 2 to 4 line decoder/demultiplexer fabricated with silicon gate CMOS technology. It achieves the high speed operation similar to equivalent Bipolar Schottky TTL while maintaining the CMOS low power dissipation. The active low enable input can be used for gating or it can be used as a data input for demultiplexing applications. When the enable input is held High, all four outputs are fixed at a high logic level independent of the other inputs. An input protection circuit ensures that 0V to 7V can be applied to the input pins without regard to the supply voltage. This device can be used to interface 5V to 3V systems and two supply systems such as battery back up. This circuit prevents device destruction due to mismatched supply and input voltages. Y Commercial Y Y Y Y Low power dissipation: ICC e 4 mA (Max.) at TA e 25 C High noise immunity: VNIH e VNIL e 28% VCC (Min.) All inputs are equipped with a power down protection function Balanced propagation delays: tPLH j tPHL Pin and function compatible with 74HC139 Package Number Package Description 74VHC139M M16A 16-Lead Molded JEDEC SOIC 74VHC139SJ M16D 16-Lead Molded EIAJ SOIC 74VHC139MSC MSC16 16-Lead Molded EIAJ Type 1 SSOP 74VHC139MTC MTC16 16-Lead Molded JEDEC Type 1 TSSOP 74VHC139N N16E 16-Lead Molded DIP Note: Surface mount packages are also available on Tape and Reel. Specify by appending the suffix letter ``X'' to the ordering code. EIAJ Type 1 SSOP available on Tape and Reel only, order MSCX. Logic Symbols Connection Diagrams Pin Assignment for DIP, SSOP, TSSOP and SOIC IEEE/IEC TL/F/11521-1 TL/F/11521 - 2 Pin Names TL/F/11521-4 C1995 National Semiconductor Corporation TL/F/11521 A0, A1 E O 0 - O3 TL/F/11521 - 3 Description Address Inputs Enable Inputs Outputs RRD-B30M125/Printed in U. S. A. 74VHC139 Dual 2-to-4 Decoder/Demultiplexer October 1995 Functional Description Truth Table The 'VHC139 is a high-speed dual 2-to-4 decoder/demultiplexer. The device has two independent decoders, each of which accepts two binary weighted inputs (A0 - A1) and provides four mutually exclusive active-LOW outputs (O0 - O3). Each decoder has an active-LOW enable (E). When E is HIGH all outputs are forced HIGH. The enable can be used as the data input for a 4-output demultiplexer application. Each half of the 'VHC139 generates all four minterms of two variables. These four minterms are useful in some applications, replacing multiple gate functions as shown in Figure 1 , and thereby reducing the number of packages required in a logic network. Inputs Outputs E A0 A1 O0 O1 O2 O3 H L L L L X L H L H X L L H H H L H H H H H L H H H H H L H H H H H L H e HIGH Voltage Level L e LOW Voltage Level X e Immaterial TL/F/11521-8 FIGURE 1. Gate Functions (Each Half) Logic Diagram TL/F/11521 - 9 Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. 2 Absolute Maximum Ratings (Note 1) Supply Voltage (VCC) DC Input Voltage (VIN) Note 1: Absolute Maximum Ratings are values beyond which the device may be damaged or have its useful life impaired. The databook specifications should be met, without exception, to ensure that the the system design is reliable over its power supply, temperature, and output/input loading variables. National does not recommend operation outside databook specifications. b 0.5V to a 7.0V b 0.5V to a 7.0V DC Output Voltage (VOUT) Input Diode Current (IIK) Output Diode Current (IOK) DC Output Current (IOUT) DC VCC/GND Current (ICC) Storage Temperature (TSTG) Lead Temperature (TL) (Soldering, 10 sec.) b 0.5V to VCC a 0.5V b 20 mA g 20 mA g 25 mA g 75 mA Recommended Operating Conditions b 65 C to a 150 C 260 C Supply Voltage (VCC) Input Voltage (VIN) Output Voltage (VOUT) Operating Temperature (TOPR) 74VHC 2.0V to a 5.5V 0V to a 5.5V 0V to VCC b 40 C to a 85 C Input Rise and Fall Time (tr, tf) VCC e 3.3V g 0.3V VCC e 5.0V g 0.5V 0 E 100 ns/V 0 E 20 ns/V DC Characteristics for 'VHC Family Devices Symbol Parameter VCC (V) 74VHC 74VHC TA e 25 C TA e b40 C to a 85 C Min VIH High Level Input Voltage 2.0 3.0-5.5 VIL Low Level Input Voltage 2.0 3.0-5.5 VOH High Level Output Voltage VOL Low Level Output Voltage IIN Input Leakage Current 3.0 4.5 2.58 3.94 ICC Quiescent Supply Current 0-5.5 5.5 Min 2.0 3.0 4.5 0.0 0.0 0.0 Conditions Max 1.50 0.7 VCC 0.50 0.3 VCC 1.9 2.9 4.4 3.0 4.5 Max 1.50 0.7 VCC 2.0 3.0 4.5 2.0 3.0 4.5 Typ Units V 0.50 0.3 VCC V 1.9 2.9 4.4 V 2.48 3.80 V VIN e VIH or VIL IOH e b50 mA IOH e b4 mA IOH e b8 mA 0.1 0.1 0.1 0.1 0.1 0.1 V 0.36 0.36 0.44 0.44 V g 0.1 g 1.0 mA VIN e 5.5V or GND 4.0 40.0 mA VIN e VCC or GND 3 VIN e VIH or VIL IOL e 50 mA IOL e 4 mA IOL e 8 mA AC Electrical Characteristics Symbol Parameter VCC (V) Min tPLH, tPHL Propagation Delay An to On 3.3 g 0.3 5.0 g 0.5 tPLH, tPHL Propagation Delay En to On 3.3 g 0.3 5.0 g 0.5 74VHC 74VHC TA e 25 C TA e b40 C to a 85 C Typ Max Min Max 7.2 11.0 1.0 13.0 9.7 14.5 1.0 16.5 5.0 7.2 1.0 8.5 6.5 9.2 1.0 10.5 6.4 9.2 1.0 11.0 8.9 12.7 1.0 14.5 4.4 6.3 1.0 7.5 5.9 8.3 1.0 9.5 10 CIN Input Capacitance 4 CPD Power Dissipation Capacitance 26 10 Units ns Conditions CL e 15 pF CL e 50 pF ns CL e 15 pF CL e 50 pF ns CL e 15 pF CL e 50 pF ns CL e 15 pF CL e 50 pF pF pF VCC e Open (Note 1) Note 1: CPD is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption without load. Average operating current can be obtained by the equation: ICC (opr.) e CPD * VCC * fIN a ICC/2 (per decoder). 4 Ordering Information The device number is used to form part of a simplified purchasing code, where the package type and temperature range are defined as follows: TL/F/11521 - 11 5 Physical Dimensions inches (millimeters) 16-Lead Small Outline Integrated Circuit JEDEC SOIC (M) NS Package Number M16A 16-Lead PlasticEIAJ SOIC (SJ) NS Package Number M16D 6 Physical Dimensions millimeters (Continued) 16-Lead Plastic EIAJ SSOP Type I (MSC) NS Package Number MSC16 16-Lead Molded JEDEC Type I TSSOP NS Package Number MTC16 7 74VHC139 Dual 2-to-4 Decoder/Demultiplexer Physical Dimensions inches (millimeters) (Continued) 16-Lead Molded Dual In-Line Package NS Package Number N16E LIFE SUPPORT POLICY NATIONAL'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 NATIONAL 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 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. National Semiconductor Corporation 1111 West Bardin Road Arlington, TX 76017 Tel: 1(800) 272-9959 Fax: 1(800) 737-7018 2. A critical component is 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. 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