DM7442AN

Revised July 2001 DM7442A BCD to Decimal Decoder General Description Features These BCD-to-decimal decoders consist of eight inverters and ten, four-input NAND gates. The inverters are connected in pairs to make BCD input data available for decoding by the NAND gates. Full decoding of input logic ensures that all outputs remain off for all invalid (10–15) input conditions. ■ Diode clamped inputs ■ Also for application as 4-line-to-16-line decoders; 3-line-to-8-line decoders ■ All outputs are high for invalid input conditions ■ Typical power dissipation 140 mW ■ Typical propagation delay 17 ns Ordering Code: Order Number DM7442AN Package Number N16E Package Description 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Connection Diagram © 2001 Fairchild Semiconductor Corporation DS006516 www.fairchildsemi.com DM7442A BCD to Decimal Decoder August 1986 DM7442A Function Table No. BCD Input Decimal Output D C B A 0 1 2 3 4 5 6 7 8 9 0 L L L L L H H H H H H H H H 1 L L L H H L H H H H H H H H 2 L L H L H H L H H H H H H H 3 L L H H H H H L H H H H H H 4 L H L L H H H H L H H H H H 5 L H L H H H H H H L H H H H 6 L H H L H H H H H H L H H H 7 L H H H H H H H H H H L H H 8 H L L L H H H H H H H H L H 9 H L L H H H H H H H H H H L I H L H L H H H H H H H H H H N H L H H H H H H H H H H H H V H H L L H H H H H H H H H H A H H L H H H H H H H H H H H L H H H L H H H H H H H H H H I H H H H H H H H H H H H H H D H = HIGH Level L = LOW Level Logic Diagram www.fairchildsemi.com 2 Supply Voltage Note 1: 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. 7V Input Voltage 5.5V 0°C to +70°C Operating Free Air Temperature Range Storage Temperature Range −65°C to +150°C Recommended Operating Conditions Symbol Parameter Min Nom Max Units 4.75 5 5.25 V VCC Supply Voltage VIH HIGH Level Input Voltage VIL LOW Level Input Voltage 0.8 V IOH HIGH Level Output Current −0.8 mA IOL LOW Level Output Current 16 mA TA Free Air Operating Temperature 70 °C 2 V 0 Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions VI Input Clamp Voltage VCC = Min, II = −12 mA VOH HIGH Level VCC = Min, IOH = Max Output Voltage VIL = Max, VIH = Min LOW Level VCC = Min, IOL = Max Output Voltage VIH = Min, VIL = Max VOL Min 2.4 Typ (Note 2) Max Units −1.5 V 3.4 0.2 V 0.4 V mA II Input Current @ Max Input Voltage VCC = Max, VI = 5.5V 1 IIH HIGH Level Input Current VCC = Max, VI = 2.4V 40 µA IIL LOW Level Input Current VCC = Max, VI = 0.4V −1.6 mA IOS Short Circuit Output Current VCC = Max (Note 3) ICC Supply Current VCC = Max (Note 4) −18 −55 mA 28 56 mA Min Max Units 25 ns 30 ns 25 ns 30 ns Note 2: All typicals are at VCC = 5V, TA = 25°C. Note 3: Not more than one output should be shorted at a time. Note 4: ICC is measured with all outputs open and all inputs grounded. Switching Characteristics at VCC = 5V and TA = 25°C Symbol tPHL Parameter Conditions Propagation Delay Time CL = 15 pF HIGH-to-LOW Level Output RL = 400Ω from A, B, C or D through 2 Levels of Logic tPHL Propagation Delay Time HIGH-to-LOW Level Output from A, B, C or D through 3 Levels of Logic tPLH Propagation Delay Time LOW-to-HIGH Level Output from A, B, C or D through 2 Levels of Logic tPLH Propagation Delay Time LOW-to-HIGH Level Output from A, B, C or D through 3 Levels of Logic 3 www.fairchildsemi.com DM7442A Absolute Maximum Ratings(Note 1) DM7442A BCD to Decimal Decoder Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300" Wide Package Number N16E 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: 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. 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. www.fairchildsemi.com www.fairchildsemi.com 4