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74LS47

Fairchild Semiconductor
Part Number 74LS47
Manufacturer Fairchild Semiconductor
Description BCD to 7-Segment Decoder/Driver
Published Apr 23, 2005
Detailed Description DM74LS47 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs October 1988 Revised March 2000 DM74LS47 BCD to 7...
Datasheet PDF File 74LS47 PDF File

74LS47
74LS47

Overview
DM74LS47 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs 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 maximum leakage current of 250 µA.
Auxiliary inputs provided blanking, lamp test and cascadable zero-suppression functions.
Features s Open-collector outputs s Drive indicator segments directly s Cascadable zero-suppression capability s Lamp test input Ordering Code: Order Number DM74LS47M DM74LS47N Package Number M16A N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.
150 Narrow 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.
300 Wide Devices also available in Tape and Reel.
Specify by appending the suffix letter “X” to the ordering code.
Logic Symbol Connection Diagram VCC = Pin 16 GND = Pin 8 Pin Descriptions 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) (Note 1) Note 1: OC—Open Collector Description © 2000 Fairchild Semiconductor Corporation DS009817 www.
fairchildsemi.
com DM74LS47 Truth Table Decimal or Function 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 BI RBI LT LT H H H H H H H H H H H H H H H H X H L RBI H X X X X X X X X X X X X X X X X L X A3 L L L L L L L L H H H H H H H H X L X Inputs A2 L L L L H H H H L L L L H H H H X L X A1 L L H H L L H H L L H H L L H H X L X A0 L H L H L H L H L H L H L H L H X L X BI/RBO H H H H H H H H H H H H H H H H L L H a L H L L H L H L L L H H H L H H H H L b L L L L L H H L L L H H L H H H H H L...


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