S.T. (SGS Thompson) HCF4049UBE
HEX BUFFER/CONVERTER (INVERTING)
The HCF4049UBE is a monolithic integrated circuit fabricated in Metal Oxide Semiconductor technology in a DIP package.
It is an inverting Hex Buffer/Converter and features logic level conversions using only one supply voltage (VDD).
The input high level signal (VIH) can exceed the VDD supply voltage when these devices are used for logic level conversions.
This device is intended for use as CMOS to DTL/TTL converters and can drive directly two DTL/TTL loads (VDD = 5V, VOL ≤ 0.4V and IOL ≤ 3.2mA.
For full datasheet copy and paste:- http://pdf1.alldatasheet.com/datasheet-pdf/view/170415/STMICROELECTRONICS/HCF4049UBEY.html