"These devices contain three independent 3-input NOR gates. The SN5427 and SN54LS27 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN7427 and SN74LS27 are characterized for operation from 0°C to 70°C.

Technology family LS
Number of channels 3
Supply voltage (min) (V) 4.75
Supply voltage (max) (V) 5.25
Inputs per channel 3
IOL (max) (mA) 8
IOH (max) (mA) -0.4
Output type Push-Pull
Input type Bipolar
Features High speed (tpd 10- 50ns)
Data rate (max) (MBps) 35
Rating Catalog
Operating temperature range (°C) 0 to 70

Features:

Package Options Include Plastic “Small Outline"" Packages, Ceramic Chip Carriers and Flat Packages, and Plastic and Ceramic DIPs
Dependable Texas Instruments Quality and Reliability