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DM74LS47 Datasheet(PDF) 1 Page - Fairchild Semiconductor

Part # DM74LS47
Description  BCD to 7-Segment Decoder/Driver with Open-Collector Outputs
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Manufacturer  FAIRCHILD [Fairchild Semiconductor]
Direct Link  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

DM74LS47 Datasheet(HTML) 1 Page - Fairchild Semiconductor

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DM74LS47
BCD to 7-Segment Decoder/Driver with Open-Collector
Outputs
General Description
The ’LS47 accepts four lines of BCD (8421) input data, gen-
erates 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 with-
stand 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
n
Open-collector outputs
n
Drive indicator segments directly
n
Cascadable zero-suppression capability
n
Lamp test input
Connection Diagram
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: *OC—Open Collector
Dual-In-Line Package
DS009817-1
Order Number DM54LS47J, DM54LS47W,
DM74LS47M or DM74LS47N
See Package Number J16A, M16A, N16E or W16A
March 1998
© 1998 Fairchild Semiconductor Corporation
DS009817
www.fairchildsemi.com


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