FM32278/276/274/272 - 5V I2C Companion
Pin Configuration
Pin Name
Function
CNT1, CNT2
A0, A1
PFO
Event Counter Inputs
Device Select inputs
Early Power-Fail Output
Reset Input/Output
Early Power-fail Input
Serial Data
VDD
SCL
SDA
NC
1
14
13
CNT1
2
CNT2
/RST
3
12
11
A0
PFI
4
SDA
A1
SCL
Serial Clock
5
10
9
NC
PFO
VBAK
VDD
Battery-Backup Supply
Supply Voltage
Ground
6
PFI
RST
VSS
7
8
VSS
VBAK
Ordering Information
Base Configuration Memory Size Operating Voltage Reset Threshold
Ordering Part Number
FM32278-G
FM32278
FM32276
FM32274
FM32272
256Kb
256Kb
64Kb
64Kb
16Kb
16Kb
4Kb
4.0-5.5V
4.0-5.5V
4.0-5.5V
4.0-5.5V
4.0-5.5V
4.0-5.5V
4.0-5.5V
4.0-5.5V
3.9, 4.4V
3.9, 4.4V
3.9, 4.4V
3.9, 4.4V
3.9, 4.4V
3.9, 4.4V
3.9, 4.4V
3.9, 4.4V
FM32278-GTR (tape&reel)
FM32276-G
FM32276-GTR (tape&reel)
FM32274-G
FM32274-GTR (tape&reel)
FM32272-G
4Kb
FM32272-GTR (tape&reel)
Other memory configurations may be available. Please contact the factory for more information.
Rev. 3.0
Feb. 2009
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