This part is a kind of semiconductor called IS61C256AL.

Function of this product has 32K x 8 High Speed CMOS STATIC RAM.

Manufacturers : Integrated Silicon Solution

Image and pinout :

Some of the text within the PDF file :

IS61C256AL 32K x 8 HIGH-SPEED CMOS STATIC RAM FEATURES • High-speed access time: 10, 12 ns • CMOS Low Power Operation 1 mW (typical) CMOS standby 125 mW (typical) operating • Fully static operation: no clock or refresh required • TTL compatible inputs and outputs • Single 5V power supply • Lead-free available ISSI ® PRELIMINARY INFORMATION DECEMBER 2005 DESCRIPTION The ISSI IS61C256AL is a very high-speed, low power, 32,768 word by 8-bit static RAMs. It is fabricated using ISSI's high-performance CMOS technology. This highly reliable process coupled with innovative circuit design techniques, yields access times as fast as 10 ns maximum. When CE is HIGH (deselected), the device assumes a standby mode at which the power dissipation can be reduced [ ... ]

IS61C256AL PDF Datasheet Download