This part is a kind of semiconductor called 24C04N.

Function of this product has AT24C04N.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • Low-voltage and Standard-voltage Operation – 2.7 (VCC = 2.7V to 5.5V) – 1.8 (VCC = 1.8V to 5.5V) • Internally Organized 128 x 8 (1K), 256 x 8 (2K), 512 x 8 (4K), 1024 x 8 (8K) or 2048 x 8 (16K) • 2-wire Serial Interface • Schmitt Trigger, Filtered Inputs for Noise Suppression • Bi-directional Data Transfer Protocol • 100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Compatibility • Write Protect Pin for Hardware Data Protection • 8-byte Page (1K, 2K), 16-byte Page (4K, 8K, 16K) Write Modes • Partial Page Writes are Allowed • Self-timed Write Cycle (10 ms max) • High-reliability – Endurance: 1 Million Write Cycles – Data Retention: 100 Years • Automotive Grade, Extended Temperature and Lead-Free Devices Available • 8-lead PDIP, 8-le [ ... ]

24C04N PDF Datasheet Download