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DM74LS47 Scheda tecnica(PDF) 1 Page - Fairchild Semiconductor |
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DM74LS47 Scheda tecnica(HTML) 1 Page - Fairchild Semiconductor |
1 / 6 page © 2000 Fairchild Semiconductor Corporation DS009817 www.fairchildsemi.com October 1988 Revised March 2000 DM74LS47 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs General Description The DM74LS47 accepts four lines of BCD (8421) input data, generates their complements internally and decodes the data with seven AND/OR gates having open-collector outputs to drive indicator segments directly. Each segment output is guaranteed to sink 24 mA in the ON (LOW) state and withstand 15V in the OFF (HIGH) state with a maxi- mum leakage current of 250 µA. Auxiliary inputs provided blanking, lamp test and cascadable zero-suppression func- tions. Features s Open-collector outputs s Drive indicator segments directly s Cascadable zero-suppression capability s Lamp test input Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbol VCC = Pin 16 GND = Pin 8 Connection Diagram Pin Descriptions Note 1: OC—Open Collector Order Number Package Number Package Description DM74LS47M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74LS47N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 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 Segment Outputs (Active LOW) (Note 1) |
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