Description
 
The SN74LS47 are Low Power Schottky BCD to 7-Segment Decoder/Drivers consisting of NAND gates, input buffers and seven AND-OR-INVERT gates. They offer active LOW, high sink current outputs for driving indicators directly. Seven NAND gates and one driver are connected in pairs to make BCD data and its complement available to the seven decoding AND-OR-INVERT gates. The remaining NAND gate and three input buffers provide lamp test, blanking input/ripple-blanking output and ripple-blanking input
The circuits accept 4-bit binary-coded-decimal (BCD) and, depending on the state of the auxiliary inputs, decodes this data to drive a 7-segment display indicator. The relative positive-logic output levels, as well as conditions required at the auxiliary inputs, are shown in the truth tables. Output configurations of the SN74LS47 are designed to withstand the relatively high voltages required for 7-segment indicators
These outputs will withstand 15 V with a maximum reverse current of 250 µA. Indicator segments requiring up to 24 mA of current may be driven directly from the SN74LS47 high performance output transistors. Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions
 
Specification
 
TYPE
DESCRIPTION
SELECT
Category
Integrated Circuits (ICs)
PMIC - Display Drivers
 
Mfr
Texas Instruments
 
Series
-
 
Package
Tube
 
Part Status
Active
 
Display Type
LED
 
Configuration
7 Segment
 
Interface
BCD
 
Digits or Characters
-
 
Voltage - Supply
4.75V ~ 5.25V
 
Operating Temperature
0°C ~ 70°C
 
Mounting Type
Through Hole
 
Package / Case
16-DIP (0.300"", 7.62mm)
 
Supplier Device Package
16-PDIP
 
Current - Supply
7mA
 
Base Product Number
74LS47