5447

DM7446A DM5447A DM7447A BCD to 7-Segment Decoders Drivers June 1989 DM7446A DM5447A DM7447A BCD to 7-Segment Decoders Drivers General Description The 46A and 47A feature active-low outputs designed for driving common-anode LEDs or incandescent indicators directly All of the circuits have full ripple-blanking input output controls and a lamp test input Segment identification and resultant displays are shown on a following page Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions All of the circuits incorporate automatic leading and or trailing-edge zero-blanking control (RBI and RBO) Lamp test (LT) of these devices may be performed at any time when the BI RBO node is at a high logic level All types contain an overriding blanking input (BI) which can be used to control the lamp intensity (by pulsing) or to inhibit the outputs Features Y Y Y Y All circuit types feature lamp intensity modulation capability Open-collector outputs drive indicators directly Lamp-test provision Leading trailing zero suppression Connection Diagram Dual-In-Line Package TL F 6518 – 1 Order Number DM5447AJ DM7446AN or DM7447AN See NS Package Number J16A or N16E C1995 National Semiconductor Corporation TL F 6518 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage 7V Input Voltage 5 5V Operating Free Air Temperature Range b 55 C to a 125 C DM54 DM74 0 C to a 70 C Storage Temperature Range b 65 C to a 150 C Note 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’’ table 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 IOH IOL IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Voltage (a thru g) High Level Output Current (BI RBO) Low Level Output Current (a thru g) Low Level Output Current (BI RBO) Free Air Operating Temperature 0 4 75 2 08 30 b0 2 DM7446A Nom 5 Max 5 25 Units V V V V mA mA mA C 40 8 70 ’46A Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH ICEX VOL II IIH IIL Parameter Input Clamp Voltage High Level Output Voltage (BI RBO) High Level Output Current (a thru g) Low Level Output Voltage Input Current Input Voltage Max Conditions VCC e Min II e b12 mA VCC e Min IOH e Max VCC e Max VO e 30V VIL e Max VIH e Min VCC e Min IOL e Max VIH e Min VIL e Max VCC e Max VI e 5 5V (Except BI RBO) VCC e Max VI e 2 4V (Except BI RBO) VCC e Max VI e 0 4V BI RBO Others 03 24 37 250 04 1 40 b4 b1 6 b4 Min Typ (Note 1) Max b1 5 Units V V mA V mA mA mA High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current IOS ICC VCC e Max (BI RBO) VCC e Max (Note 2) mA mA 60 103 Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 ICC is measured with all outputs open and all inputs at 4 5V 2 ’46A Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) Symbol tPLH tPHL Parameter Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Conditions CL e 15 pF RL e 120X Min Max 100 100 Units ns ns Recommended Operating Conditions Symbol VCC VIH VIL VOH IOH IOL IOL TA Parameter Min Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Voltage (a thru g) High Level Output Current (BI RBO) Low Level Output Current (a thru g) Low Level Output Current (BI RBO) Free Air Operating Temperature b 55 DM5447A Nom 5 Max 55 Min 4 75 2 08 15 b0 2 DM7447A Nom 5 Max 5 25 Units V V 08 15 b0 2 45 2 V V mA mA mA C 40 8 125 0 40 8 70 ’47A Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol VI VOH ICEX VOL II IIH IIL Parameter Input Clamp Voltage High Level Output Voltage (BI RBO) High Level Output Current (a thru g) Low Level Output Voltage Input Current Input Voltage Max Conditions VCC e Min II e b12 mA VCC e Min IOH e Max VCC e Max VO e 15V VIL e Max VIH e Min VCC e Min IOL e Max VIH e Min VIL e Max VCC e Max VI e 5 5V VCC e Max VI e 2 4V VCC e Max VI e 0 4V BI RBO Others 03 24 37 250 04 1 40 b4 b1 6 b4 Min Typ (Note 1) Max b1 5 Units V V mA V mA mA mA High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current IOS ICC VCC e Max (BI RBO) VCC e Max (Note 2) DM54 DM74 60 60 mA mA 85 103 Note 1 All typicals are at VCC e 5V TA e 25 C Note 2 ICC is measured with all outputs open and all inputs at 4 5V 3 ’47A Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load) Symbol tPLH tPHL Parameter Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output Conditions CL e 15 pF RL e 120X Min Max 100 100 Units ns ns Function Table 46A 47A Decimal or Function 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 BI RBI LT Inputs LT H H H H H H H H H H H H H H H H X H L RBI H X X X X X X X X X X X X X X X X L X D L L L L L L L L H H H H H H H H X L X C L L L L H H H H L L L L H H H H X L X B L L H H L L H H L L H H L L H H X L X A L H L H L H L H L H L H L H L H X L X BI RBO (Note 1) H H H H H H H H H H H H H H H H L L H Outputs a L H L L H L H L L L H H H L H H H H L b L L L L L H H L L L H H L H H H H H L c L L H L L L L L L L H L H H H H H H L d L H L L H L L H L H L L H L L H H H L e L H L H H H L H L H L H H H L H H H L f L H H H L L L H L L H H L L L H H H L g H H L L L L L H L L L L L L L H H H L (3) (4) (5) Note (2) Note 1 BI RBO is a wire-AND logic serving as blanking input (BI) and or ripple-blanking output (RBO) Note 2 The blanking input (BI) must be open or held at a high logic level when output functions 0 through 15 are desired The ripple-blanking input (RBI) must be open or high if blanking of a decimal zero is not desired Note 3 When a low logic level is applied directly to the blanking input (BI) all segment outputs are high regardless of the level of any other input Note 4 When ripple-blanking input (RBI) and inputs A B C and D are at a low level with the lamp test input high all segment outputs go H and the rippleblanking output (RBO) goes to a low level (response condition) Note 5 When the blanking input ripple-blanking output (BI RBO) is open or held high and a low is applied to the lamp-test input all segment outputs are L H e High level L e Low level X e Don’t Care 4 Logic Diagram TL F 6518 – 2 Physical Dimensions inches (millimeters) 16-Lead Ceramic Dual-In-Line Package (J) Order Number DM5447AJ NS Package Number J16A 5 DM7446A DM5447A DM7447A BCD to 7-Segment Decoders Drivers Physical Dimensions inches (millimeters) (Continued) 16-Lead Molded Dual-In-Line Package (N) Order Number DM7446AN or DM7447AN 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 National Semiconductor Europe Fax (a49) 0-180-530 85 86 Email cnjwge tevm2 nsc com Deutsch Tel (a49) 0-180-530 85 85 English Tel (a49) 0-180-532 78 32 Fran ais Tel (a49) 0-180-532 93 58 Italiano Tel (a49) 0-180-534 16 80 National Semiconductor Hong Kong Ltd 13th Floor Straight Block Ocean Centre 5 Canton Rd Tsimshatsui Kowloon Hong Kong Tel (852) 2737-1600 Fax (852) 2736-9960 National Semiconductor Japan Ltd Tel 81-043-299-2309 Fax 81-043-299-2408 National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications