This part is a kind of semiconductor called S93C46B.

Function of this product has (S93Cx6B) CMOS SERIAL E2PROM.

Manufacturers : Seiko Instruments

Image and pinout :

Some of the text within the PDF file :

Rev. 3.1_01 CMOS SERIAL E2PROM S-93C46B/56B/66B The S-93C46B/56B/66B is a high speed, low current consumption, 1/2/4 K-bit serial E2PROM with a wide operating voltage range. It is organized as 64-word × 16-bit, 128-word × 16-bit, 256-word × 16-bit, respectively. Each is capable of sequential read, at which time addresses are automatically incremented in 16-bit blocks. The instruction code is compatible with the NM93CS46/56/66. „ Features • Low current consumption Standby: 1.5 µA Max. (VCC = 5.5 V) Operating: 0.8 mA Max. (VCC = 5.5 V) 0.4 mA Max. (VCC = 2.5 V) Read: 1.8 to 5.5 V (at −40 to +85°C) Write: 2.7 to 5.5 V (at −40 to +85°C) • Wide operating voltage range • Sequential read capable • Write disable function when power supply voltage is low [ ... ]

S93C46B PDF Datasheet Download