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| DM74LS247 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs March 1998 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 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. Connection Diagram Dual-In-Line Package Logic Symbol DS009822-2 VCC = Pin 16 GND = Pin 8 DS009822-1 Order Number DM74LS247M or DM74LS247N See Package Number M16A or N16E Pin Names A0-A3 RBI LT BI/RBO a-g BCD Inputs Ripple Blanking Input (Active LOW) Lamp Test Input (Active LOW) Blanking Input (Active LOW) or Ripple Blanking Output (Active LOW) Segment Outputs (Active LOW) Description (c) 1998 Fairchild Semiconductor Corporation DS009822 www.fairchildsemi.com Absolute Maximum Ratings (Note 1) Supply Voltage Input Voltage 7V 7V Operating Free Air Temperature Range Storage Temperature Range 0C to +70C -65C to +150C Recommended Operating Conditions Symbol VCC VIH VIL IOH IOL TA Supply Voltage High Level Input Voltage Low Level Input Voltage High Level Output Current BI/RBO Low Level Output Current Free Air Operating Temperature 0 Parameter Min 4.75 2 0.8 -50 24 70 Nom 5 Max 5.25 Units V V V A mA C 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 VI VOH IOFF VOL Parameter Input Clamp Voltage High Level Output Voltage Output High Current Segment Outputs Low Level Output Voltage VCC = Min IOL = Max, VIH = Min BI/RBO a -g BI/RBO 0.25 0.35 0.5 0.5 0.4 0.4 0.1 20 Other Inputs BI/RBO Input -0.3 -0.4 -1.2 -2.0 13 mA A mA mA mA mA V Conditions VCC = Min, II = - 18 mA VCC = Min, IOH = Max, VIL = Max VCC = 5.5V, VO = 15V Min Typ (Note 2) -1.5 2.4 3.4 250 V V A Max Units II IIH IIL IOS ICC Input Current @ Max Input Voltage High Level Input Current Low Level Input Current Short Circuit Output Current Supply Current VCC IOL = 3.2 mA IOL = 12 mA IOL = 1.6 mA = Max, VI = 7V VCC = Max, VI = 2.7V VCC = Max, VI = 0.4V VCC = Max, VI = 0.4V VCC = Max (Note 3) VCC = Max Note 2: All typicals are at VCC = 5V, TA = 25C. 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 = +25C Symbol tPLH tPHL Parameter Min Propagation Delay Time Low to High Level Output Propagation Delay Time High to Low Level Output 100 ns RL = 2 k CL = 15 pF Max 100 ns Units 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 Fairchild Semiconductor Europe Fax: +49 (0) 1 80-530 85 86 Email: europe.support@nsc.com 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 www.fairchildsemi.com 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. |
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