This part is a kind of semiconductor called 74F373.
Function of this product has Octal Transparent Latch with TRI-STATE Outputs.
Manufacturers : National
Image and pinout :

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54F 74F373 Octal Transparent Latch with TRI-STATE Outputs May 1995 54F 74F373 Octal Transparent Latch with TRI-STATE Outputs General Description The ’F373 consists of eight latches with TRI-STATE outputs for bus organized system applications The flip-flops appear transparent to the data when Latch Enable (LE) is HIGH When LE is LOW the data that meets the setup times is latched Data appears on the bus when the Output Enable (OE) is LOW When OE is HIGH the bus output is in the high impedance state Features Y Y Y Eight latches in a single package TRI-STATE outputs for bus interfacing Guaranteed 4000V minimum ESD protection Commercial 74F373PC Military Package Number N20A Package Description 20-Lead (0 300 Wide) Molded Dual-In-Line 20-Lead Ceramic Dual-In-Line 20-Lead (0 300 Wide) M [ ... ]
74F373 PDF Datasheet Download
