DS8669 2-Digit BCD to 7-Segment Decoder/Driver General Description Features The DS8669 is a 2-digit BCD to 7-segment decoder/driver for use with common anode LED displays. The DS8669 drives 2 7-segment LED displays without multiplexing. Outputs are open-collector, and capable of sinking 25 mA/segment. Applications include TV and CB channel displays. Y Y Y Y Y Y Direct 7-segment drive 25 mA/segment current sink capability Low power requirementÐ16 mA typ Very low input currentsÐ2 mA typ Input clamp diodes to both VCC and ground No multiplexing oscillator noise Logic and Connection Diagrams Dual-In-Line Package TL/F/5836 – 1 TL/F/5836 – 2 Top View Order Number DS8669N See NS Package Number N24A C1995 National Semiconductor Corporation TL/F/5836 RRD-B30M105/Printed in U. S. A. DS8669 2-Digit BCD to 7-Segment Decoder/Driver August 1986 Absolute Maximum Ratings (Note 1) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/Distributors for availability and specifications. Maximum Power Dissipation* at 25§ C Molded Package Lead Temperature (Soldering, 10 seconds) Supply Voltage Input Current Output Voltage Storage Temperature Range *Derate molded package 16.04 mW/§ C above 25§ C. 7V 20 mA 12V 2005 mW 300§ C Operating Conditions Min 4.5 0 b 65§ C to a 150§ C Supply Voltage (VCC) Temperature (TA) Max 6.0 a 70 Units V §C Electrical Characteristics VCC e 5.25V, (Note 2) Symbol Max Units Logical ‘‘1’’ Input Voltage VCC e Min 2.0 VCC a 0.6 V VIL Logical ‘‘0’’ Input Voltage VCC e Min b 0.3 0.8 V IO Logical ‘‘1’’ Output Leakage Current VCC e Max, VOUT e 10V 50 mA VOL Logical ‘‘0’’ Output Voltage IOL e 25 mA, VCC e Min 0.4 0.8 V IIH Logical ‘‘1’’ Input Current VIN e VCC e Max 2.0 10 mA IIL Logical ‘‘0’’ Input Current VIN e 0V, VCC e Max b 0.1 b 10 mA ICC Supply Current All Outputs Low, VCC e Max 16 25 mA VIC Input Clamp Voltage IIN e 10 mA VCC a 1.5V V b 1.5V V 10 ms 10 ms VIH Parameter Conditions IIN e b10 mA tpd0 Propagation Delay to a Logical ‘‘0’’ from Any Input to Any Output tpd1 Propagation Delay to a Logical ‘‘1’’ from Any Input to Any Output RL e 400X CL e 50 pF TA e 25§ C Min Typ 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 DS8669. All typicals are given for VCC e 5.25V and TA e 25§ C. 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 Truth Table ‘‘0’’ e Segment ON TL/F/5836 – 3 ‘‘1’’ e Segment OFF Display Segment Notation TL/F/5836 – 4 AC Test Circuit TL/F/5836 – 5 Switching Time Waveforms TL/F/5836 – 6 3 DS8669 2-Digit BCD to 7-Segment Decoder/Driver Physical Dimensions inches (millimeters) Molded Dual-In-Line Package (N) Order Number DS8669N NS Package Number N24A 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 Fran3ais 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.