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DM74LS47_07 Datasheet

  • DM74LS47_07

  • BCD to 7-Segment Decoder/Driver with Open-Collector Outputs

  • FAIRCHILD

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DM74LS47 BCD to 7-Segment Decoder/Driver with Open-Collector Outputs
March 1998
DM74LS47
BCD to 7-Segment Decoder/Driver with Open-Collector
Outputs
General Description
The 鈥橪S47 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 碌A(chǔ). Auxiliary inputs provided blanking, lamp
test and cascadable zero-suppression functions.
Features
n
n
n
n
Open-collector outputs
Drive indicator segments directly
Cascadable zero-suppression capability
Lamp test input
Connection Diagram
Dual-In-Line Package
DS009817-1
Order Number DM54LS47J, DM54LS47W,
DM74LS47M or DM74LS47N
See Package Number J16A, M16A, N16E or W16A
Pin Names
A0鈥揂3
RBI
LT
BI/RBO
a 鈥揼
Note 1:
*
OC鈥擮pen Collector
Description
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)
漏 1998 Fairchild Semiconductor Corporation
DS009817
www.fairchildsemi.com

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