dm74ls47 Fairchild Semiconductor, dm74ls47 Datasheet

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dm74ls47

Manufacturer Part Number
dm74ls47
Description
Bcd To 7-segment Decoder/driver With Open-collector Outputs
Manufacturer
Fairchild Semiconductor
Datasheet

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© 1998 Fairchild Semiconductor Corporation
Note 1:
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.
Connection Diagram
*
OC—Open Collector
LT
BI/RBO
a –g
A0–A3
RBI
Pin Names
DS009817
See Package Number J16A, M16A, N16E or W16A
Order Number DM54LS47J, DM54LS47W,
DM74LS47M or DM74LS47N
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)
Dual-In-Line Package
Description
Features
n Open-collector outputs
n Drive indicator segments directly
n Cascadable zero-suppression capability
n Lamp test input
DS009817-1
www.fairchildsemi.com
March 1998

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dm74ls47 Summary of contents

Page 1

... Features n Open-collector outputs n Drive indicator segments directly n Cascadable zero-suppression capability n Lamp test input Dual-In-Line Package DS009817-1 DM74LS47M or DM74LS47N Description BCD Inputs Ripple Blanking Input (Active LOW) Lamp Test Input (Active LOW) Blanking Input (Active LOW) or Ripple Blanking Output (Active LOW) ...

Page 2

... Max 2. Max 0. Max V DM54 CC (Note BI/RBO DM74 OS = Max −55˚C to +125˚C 0˚C to +70˚C −65˚C to +150˚C DM74LS47 Units Min Nom Max 4. 0.8 V −250 µA −50 µ ˚C Min Typ Max ...

Page 3

Switching Characteristics = +5.0V +25˚ Symbol Parameter t Propagation Delay PLH –g PHL t Propagation Delay PLH t RBI to a –g (Note 6) PHL Note HIGH, ...

Page 4

Logic Diagram Numerical Designations—Resultant Displays www.fairchildsemi.com DS009817-4 4 DS009817-3 ...

Page 5

Logic Symbol = Pin GND = Pin 8 Truth Table Decimal Inputs or Function LT RBI ...

Page 6

... Physical Dimensions inches (millimeters) unless otherwise noted www.fairchildsemi.com 16-Lead Ceramic Dual-In-Line Package (J) Order Number DM54LS47J Package Number J16A 16-Lead Small Outline Molded Package (M) Order Number DM74LS47M Package Number M16A 6 ...

Page 7

... Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 16-Lead Molded Dual-In-Line Package (N) Order Number DM74LS47N Package Number N16E 16-Lead Ceramic Flat Package (W) Order Number DM54LS47W Package Number W16A 7 www.fairchildsemi.com ...

Page 8

... A critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system affect its safety or effectiveness. Fairchild Semiconductor Hong Kong Ltd. Fax: +49 (0) 1 80-530 85 86 13th Floor, Straight Block, Email: europe ...

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