DM74LS247 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs General Description The ’LS247 has active LOW open-collector outputs guaranteed to sink 24 mA. It has the same electrial characteristics and pin connections as the ’LS47. The only difference is that Connection Diagram the ’LS247 will light the top bar (segment a) for numeral 6 and the bottom bar (segment d) for number 9. For detailed description and specifications please refer to the ’LS47 data sheet. Logic Symbol Dual-In-Line Package DS009822-2 VCC = Pin 16 GND = Pin 8 DS009822-1 Order Number DM74LS247M or DM74LS247N See Package Number M16A or N16E Pin Names Description A0–A3 BCD Inputs RBI Ripple Blanking Input (Active LOW) LT Lamp Test Input (Active LOW) BI/RBO Blanking Input (Active LOW) or Ripple Blanking Output (Active LOW) a–g © 1998 Fairchild Semiconductor Corporation DS009822 Segment Outputs (Active LOW) www.fairchildsemi.com DM74LS247 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs March 1998 Absolute Maximum Ratings (Note 1) Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 7V 0˚C to +70˚C −65˚C to +150˚C Recommended Operating Conditions Symbol Parameter Min Nom Max Units 4.75 5 5.25 V Low Level Input Voltage 0.8 V VCC Supply Voltage VIH High Level Input Voltage VIL 2 V IOH High Level Output Current BI/RBO −50 µA IOL Low Level Output Current 24 mA TA Free Air Operating Temperature 70 ˚C 0 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” table are not guaranteed at the absolute maximum ratings. The “Recommended Operating Conditions” table will define the conditions for actual device operation. Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted) Symbol Parameter Conditions Min Typ Max Units (Note 2) VI Input Clamp Voltage VOH High Level Output Voltage IOFF Output High Current VCC = Min, II = − 18 mA VCC = Min, IOH = Max, VIL = Max VCC = 5.5V, VO = 15V −1.5 2.4 3.4 V V 250 µA 0.35 0.5 V 0.25 0.4 Segment Outputs VOL Low Level Output Voltage Input Current @ Max II VCC = Min VCC IOL = Max, VIH = Min IOL = 3.2 mA IOL = 12 mA IOL = 1.6 mA = Max, VI = 7V 0.5 BI/RBO a –g 0.4 BI/RBO 0.1 mA Input Voltage IIH High Level Input Current IIL Low Level Input Current IOS Short Circuit Output Current VCC = Max, VI = 2.7V VCC = Max, VI = 0.4V VCC = Max, VI = 0.4V VCC = Max (Note 3) ICC Supply Current VCC = Max Other Inputs BI/RBO Input −0.3 20 µA −0.4 mA −1.2 mA −2.0 mA 13 mA Note 2: All typicals are at VCC = 5V, TA = 25˚C. Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second. Switching Characteristics VCC = +5V, TA = +25˚C Symbol RL = 2 kΩ CL = 15 pF Parameter Min tPLH Propagation Delay Time Units Max 100 ns 100 ns Low to High Level Output tPHL Propagation Delay Time High to Low Level Output www.fairchildsemi.com 2 Physical Dimensions inches (millimeters) unless otherwise noted 16-Lead Small Outline Molded Package (M) Order Number DM74LS247M Package Number M16A 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS247N Package Number N16E 3 www.fairchildsemi.com DM74LS247 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs 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 1. Life support devices or systems are devices or sysdevice or system whose failure to perform can be reatems which, (a) are intended for surgical implant into sonably expected to cause the failure of the life support the body, or (b) support or sustain life, and (c) whose device or system, or to affect its safety or effectiveness. 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. Fairchild Semiconductor Corporation Americas Customer Response Center Tel: 1-888-522-5372 www.fairchildsemi.com Fairchild Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: [email protected] Deutsch Tel: +49 (0) 8 141-35-0 English Tel: +44 (0) 1 793-85-68-56 Italy Tel: +39 (0) 2 57 5631 Fairchild Semiconductor Hong Kong Ltd. 13th Floor, Straight Block, Ocean Centre, 5 Canton Rd. Tsimshatsui, Kowloon Hong Kong Tel: +852 2737-7200 Fax: +852 2314-0061 National Semiconductor Japan Ltd. Tel: 81-3-5620-6175 Fax: 81-3-5620-6179 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.