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BU9877FV Datasheet

  • BU9877FV

  • Serial interface IC for DIMMs supporting plug & play

  • 9頁

  • ROHM

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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.
鈥?/div>
Applications144-pin DRAM modules containing syn-
168-pin and
chronous DRAM
鈥?/div>
Features
1) 2-k bit EEPROM with configuration of 256 words
脳
8
bits.
2) Compliance with SPD data format.
3) Dual-line serial (I
2
C 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.
鈥?/div>
Absolute maximum ratings (Ta = 25擄C)
Parameter
Applied voltage
Power dissipation
Storage temperature
Operating temperature
Input voltage
Symbol
V
CC
Pd
Tstg
Topr
鈥?/div>
Limits
鈥?0.3 ~ + 7.0
300
鈭?/div>
鈥?65 ~ + 125
鈥?40 ~ + 85
鈥?0.3 ~ V
CC
+ 0.3
Unit
V
mW
擄C
擄C
V
鈭?/div>
1 Reduced by 3.0mW for each increase in Ta of 1擄C over 25擄C.
鈥?/div>
Recommended operating conditions (Ta = 25擄C)
Parameter
Power supply voltage
Input voltage
Symbol
V
CC
V
IN
Limits
2.7 ~ 5.5
0 ~ V
CC
Unit
V
V
1

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