BU9877FV Datasheet, PDF (1/9 Pages) Rohm – Serial interface IC for DIMMs supporting plug & play

Memory ICs
Serial interface IC for DIMMs sup-
porting plug & play
BU9877FV
The BU9877FV is a 2-k bit EEPROM with a write protect function, developed for DIMMs (Dual In-line Memory
Modules) containing a synchronous DRAM. This IC stores IDs in memory in order to enable Plug & Play functions.
•^Applications
168-pin and 144-pin DRAM modules containing syn-
chronous DRAM
•^Features
1) 2-k bit EEPROM with configuration of 256 words × 8
bits.
2) Compliance with SPD data format.
3) Dual-line serial (I²C bus) interface.
4) Protective functions enabled by a one-time ROM
and write protect pin.
Soft ware protection. as a one-time ROM: 00 to 7Fh.
Hard ware protection (WP pin): 80 to FFh.
5) Compact SSOP-B 8-pin package.
•^{Absolute maximum ratings (Ta = 25°C)}
Parameter
Symbol
Limits
Unit
Applied voltage
Power dissipation
VCC
– 0.3 ~ + 7.0
V
Pd
300^∗
mW
Storage temperature
Tstg
– 65 ~ + 125
°C
Operating temperature
Topr
– 40 ~ + 85
°C
Input voltage
—
– 0.3 ~ VCC + 0.3
V
∗1 Reduced by 3.0mW for each increase in Ta of 1°C over 25°C.
•^{Recommended operating conditions (Ta = 25°C)}
Parameter
Symbol
Limits
Unit
Power supply voltage
VCC
2.7 ~ 5.5
V
Input voltage
VIN
0 ~ VCC
V
1