Document
Rev.1.2_00
2-WIRE CMOS SERIAL E2PROM FOR DIMM SERIAL PRESENCE DETECT
S-34C02A
S-34C02A is a 2-wired serial E2PROM for DIMM Serial Presence Detect which operates with low current consumption and the wide range operation. The S-34C02A has the capacity of 2K-bit and the organization of 256 words × 8-bit, is able to Page Write and Sequential Read. S-34C02A has Hardware Protect and Software Protect. Hardware Protect inhibits Write to all memory area by connecting the WP pin to VCC. Software Protect inhibits Write in 50% of the lower address (the address 00h to 7Fh) in all memory area by inputting command when the WP pin is connected to GND or left open.
Features
• Operating voltage range
Read:
1.6 to 5.5 V
Write:
1.7 to 5.5 V
• Page write:
16 bytes / page
• Sequential read
• Operation frequency: • Noise filtering
400 kHz (VCC = 2.5 to 5.5 V) Schmitt trigger and noise filter on bus input pins (SCL, SDA)
• Write protect function during low power supply
• Endu.