AND-OR-invert Gates - SN54LS51


AND-OR-invert Gates



The '51 and 'S51 contain two independent 2-wide 2-input AND-OR-INVERT gates. They perform the Boolean function Y = AB + CD\.

The 'LS51 contains one 2-wide 3-input and one 2-wide 2-input AND-OR-INVERT gates. They perform the Boolean functions 1Y = (1A · 1B · 1C) + (1D · 1E · 1F)\ and 2Y = (2A · 2B) + (2C · 2D)\.

The SN5451, SN54LS51, and SN54S51 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN7451, SN74LS51 and SN74S51 are characterized for operation from 0°C to 70°C.



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


View more

Other qualified versions of SN54LS51

Version Part Number Definition
Catalog SN74LS51 TI's standard catalog product

Parametrics Compare all products in Gate Products

Technology Family
VCC (Min) (V)
VCC (Max) (V)
Bits (#)
Schmitt Trigger
F @ Nom Voltage (Max) (Mhz)
ICC @ Nom Voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
Output Drive (IOL/IOH) (Max) (mA)
Input Type
Output Type
Operating Temperature Range (C)
Package Group
Package Size: mm2:W x L (PKG)
SN54LS51 SN74LS51
LS    LS   
4.5    4.75   
5.5    5.25   
2    2   
No    No   
35    35   
0.014    0.014   
20    20   
-0.4/16    0.4/-16   
TTL    TTL   
TTL    TTL   
Military    Catalog   
-55 to 125    0 to 70   
See datasheet (CFP),See datasheet (CDIP)    See datasheet (PDIP)