DS55493/DS75493 Quad LED Segment Driver General Description Features The DS55493/DS75493 is a quad LED segment driver. It is designed to interface between MOS IC’s and LED’s. An external resistor is required for each segment to drive the output current which is approximately equal to 0.7V/RL and is relatively constant, independent of supply variations. Blanking can be achieved by taking the chip enable (CE) to a logical ‘‘1’’ level. Y Y Y Y Y Y Low voltage operation Low input current for MOS compatibility Low standby power Display blanking capability Output current regulation Quad high gain circuits Schematic and Connection Diagrams TL/F/7561 – 1 Dual-In-Line Package Truth Table CE VIN IOUT 0 0 1 1 0 X ON OFF OFF X e Don’t care TL/F/7561 – 2 Order Number DS55493J, DS75493J or DS75493N See NS Package Number J16A or N16A C1995 National Semiconductor Corporation TL/F/7561 RRD-B30M105/Printed in U. S. A. DS55493/DS75493 Quad LED Segment Driver April 1990 Absolute Maximum Ratings (Note 1) Operating Conditions If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Supply Voltage Input Voltage Output Voltage 10V 10V VCC Min Max Units Supply Voltage VCC VSS 3.2 6.5 8.8 8.8 V V Temperature TA DS75493 DS55493 0 b 55 a 70 a 125 §C §C b 65§ C to a 150§ C Storage Temperature Range b 25 mA Output Current (IOUT) Maximum Power Dissipation* at 25§ C Cavity Package 1371 mW Molded Package 1280 mW Lead Temperature (Soldering, 4 seconds) 260§ C *Derate cavity package 9.14 mW/§ C above 25§ C; derate molded package 10.24 mW/§ C above 25§ C. Electrical Characteristics (VSS t VCC) (Notes 2 and 3) Symbol IIN Parameter Input Current Max Units VSS e Max, VIN e 8.8V, VCC e Open, VCE e 0V Conditions 3.2 mA IOUT e RSET 3.6 mA 2.1 mA @ Min 0V, VCE e 8.8V ICE Chip Enable Input Current VCC e Max, VSS e Max, VCE e 8.8V, All Other Pins to GND IOUT Output Current IOUT @ 2.15V, RL e 50X VCC e Min, VSS e 6.5V, ICE e 80 mA, VIN e 6.5V Through 1.0 kX b8 VCE e 0V, VIN e 8.8V IOL Output Leakage Current Typ IOUT e RSET @ 0V, Measure Current to Gnd, VSS e 8.8V b 13 b 16 mA b 20 mA VCC e Min, VCE e 0V VIN e 8.8V Through 100 kX b 200 mA VCE e 6.5V Though 1.0 kX, VIN e 8.8V b 100 mA ICC Supply Current, VCC VCC e Max, VSS e Max, All Other Pins to Gnd 40 mA ISS Supply Current VCC e 0V, All Other Pins to Gnd 40 mA 1.5 mA 1.4 mA VCC e Min, VSS e 8.8V IOUT @ 2.15V, VCE e 8.8V Through 100 kX, RL e 50X 0.5 IOUT e Open, RSET e Open, VCE e 0V Switching Characteristics TA e 25§ C, nominal power supplies unless otherwise noted Symbol Parameter Conditions tpd(OFF) Propagation Delay to a Logical ‘‘0’’ From Input to Output (See AC Test Circuit tpd(ON) Propagation Delay to a Logical ‘‘1’’ From Input to Output (See AC Test Circuit) Min Typ Max Units 170 300 ns 11 100 ns Note 1: ‘‘Absolute Maximum Ratings’’ are those values beyond which the safety of the device cannot be guaranteed. They are not meant to imply that the devices should be operated at these limits. The table of ‘‘Electrical Characteristics’’ provides conditions for actual device operation. Note 2: Unless otherwise specified min/max limits apply across the 0§ C to a 70§ C range for the DS75493 and across the b 55§ C to a 125§ C range for the DS55493. Note 3: All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown as max or min on absolute value basis. 2 Typical Applications TL/F/7561 – 3 AC Test Circuit Switching Time Waveforms TL/F/7561 – 5 TL/F/7561 – 4 Physical Dimensions inches (millimeters) Order Number DS55493J, DS75493J NS Package Number J16A 3 DS55493/DS75493 Quad LED Segment Driver Physical Dimensions inches (millimeters) (Continued) Order Number DS75493N See NS Package Number N16A 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. 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