The NTE4049/NTE4049T (Inverting) and NTE4050B/NTE4050BT (Non−Inverting) are Hex Buffers and feature logic−level conversion using only one supply voltage (VDD). The input−signal high level (VIH) can exceed the VDD supply voltage when these devices are used for logic level conversions. These devices are intended for use as COS/MOS to DTL/TTL converters and can drive directly two DTL/TTL loads (VDD = 5V, VOL  400mV, IOL  3.2mA). These devices are available in a standard 16−Lead DIP (NTE4049 and NTE4050B) and SOIC−16 surface mount (NTE4049T and NTE4050BT) type packages.
 
Full spec sheet:
https://www.nteinc.com/specs/4000to4099/pdf/nte4049_50B.pdf