This post explains for the semiconductor TTL.
The Part Number is 7400, DM74LS00M, DM74LS00SJ, DM74LS00N.
The function of this IC is Quad 2-Input NAND Gate.
The package is DIP, SOP 14 Pin Type
Manufacturer: Fairchild Semiconductor
This device contains four independent gates each of which performs the logic NAND function. Quad 2-Input NAND Gate.
August 1986 Revised March 2000 DM74LS00 Quad 2-Input NAND Gate General Description. Ordering Code: Order Number DM74LS00M DM74LS00SJ DM74LS00N Package Number M14A M14D N14A Package Description 14-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-120, 0.150 Narrow 14-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 14-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table Y = AB Inputs A L L H H H = HIGH Logic Level L = LOW Logic Level Output B L H L H Y H H H L © 2000 Fairchild Semiconductor Corporation DS006439 www.fairchildsemi.com DM74LS00 Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 7V 0°C to +70° […]