Part Number : 74LS42
Function :DM74LS42, 74LS42 / BCD/Decimal Decoders /
Manufacturer : National ->Texas Instruments
Pinout : 
Description
These BCD-to-decimal decoders consist of eight inverters and ten, four-input NAND gates. The inverters are connected in pairs to make BCD input data available for decoding by the NAND gates. Full decoding of input logic ensures that all outputs remain off for all invalid (10± 15) input conditions.
Acquired by Texas Instruments on September 23rd, 2011.
Datasheet PDF Download
Other datasheets in the file : 54LS42, 54LS42DMQB, 54LS42FMQB, 74LS42, DM54LS42