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| DM7445 BCD to Decimal Decoders/Drivers September 1986 Revised February 2000 DM7445 BCD to Decimal Decoders/Drivers General Description These BCD-to-decimal decoders/drivers 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 BCD input logic ensures that all outputs remain OFF for all invalid (10-15) binary input conditions. These decoders feature high-performance, NPN output transistors designed for use as indicator/relay drivers, or as open-collector logic-circuit drivers. The high-breakdown output transistors are compatible for interfacing with most MOS integrated circuits. Features s Full decoding of input logic s 80 mA sink-current capability s All outputs are off for invalid BCD input conditions Ordering Code: Order Number DM7445 Package Number N16E Package Description 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Connection Diagram (c) 2000 Fairchild Semiconductor Corporation DS006517 www.fairchildsemi.com DM7445 Function Table No. D 0 1 2 3 4 5 6 7 8 9 I N V A L I D H = HIGH Level (OFF) L = LOW Level (ON) Inputs C L L L L H H H H L L L L H H H H B L L H H L L H H L L H H L L H H A L H L H L H L H L H L H L H L H 0 L H H H H H H H H H H H H H H H 1 H L H H H H H H H H H H H H H H 2 H H L H H H H H H H H H H H H H 3 H H H L H H H H H H H H H H H H L L L L L L L L H H H H H H H H Outputs 4 H H H H L H H H H H H H H H H H 5 H H H H H L H H H H H H H H H H 6 H H H H H H L H H H H H H H H H 7 H H H H H H H L H H H H H H H H 8 H H H H H H H H L H H H H H H H 9 H H H H H H H H H L H H H H H H Logic Diagram www.fairchildsemi.com 2 DM7445 Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Output Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 5.5V 30V 0C to +70C -65C to +150C 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. Recommended Operating Conditions Symbol VCC VIH VIL VOH IOL TA Parameter Supply Voltage HIGH Level Input Voltage LOW Level Input Voltage HIGH Level Output Voltage LOW Level Output Current Free Air Operating Temperature 0 Min 4.75 2 0.8 30 20 70 Nom 5 Max 5.25 Units V V V V mA C Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI ICEX VOL Parameter Input Clamp Voltage HIGH Level Output Current LOW Level Output Voltage Conditions VCC = Min, II = -12 mA VCC = Min, VO = 30V VIL = Max, VIH = Min VCC = Min, IOL = Max VIH = Min, VIL = Max IOL = 80 mA VCC = Min II IIH IIL ICC Input Current @ Max Input Voltage HIGH Level Input Current LOW Level Input Current Supply Current VCC = Max, VI = 5.5V VCC = Max, VI = 2.4V VCC = Max, VI = 0.4V VCC = Max (Note 3) 43 0.2 0.5 Min Typ (Note 2) Max -1.5 250 0.4 V 0.9 1 40 -1.6 70 mA A mA mA Units V A Note 2: All typicals are at VCC = 5V, TA = 25C. Note 3: ICC is measured with all inputs grounded and all outputs OPEN. Switching Characteristics at VCC = 5V and TA = 25C Symbol tPLH tPHL Parameter Propagation Delay Time LOW-to-HIGH Level Output Propagation Delay Time HIGH-to-LOW Level Output Conditions CL = 15 pF RL = 100 Min Max 49.5 49.5 Units ns ns 3 www.fairchildsemi.com DM7445 BCD to Decimal Decoders/Drivers 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: 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 4 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. www.fairchildsemi.com |
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