FM31276-G Ver la hoja de datos (PDF) - Cypress Semiconductor
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FM31276-G Datasheet PDF : 26 Pages
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A general-purpose comparator compares an external
input pin to the onboard 1.2V reference. This is
useful for generating a power-fail interrupt (NMI) but
can be used for any purpose. The family also includes
a programmable 64-bit serial number that can be
locked making it unalterable. Additionally it offers a
dual battery-backed event counter that tracks the
number of rising or falling edges detected on
dedicated input pins.
Pin Configuration
CNT1
1
14
CNT2
2
13
A0
3
12
A1
4
11
CAL/PFO
5
10
RST
6
9
VSS
7
8
VDD
SCL
SDA
X2
X1
PFI
VBAK
FM31278/276 – 5V I2C Companion
Pin Name
CNT1, CNT2
A0, A1
CAL/PFO
/RST
PFI
X1, X2
SDA
SCL
VBAK
VDD
VSS
Function
Event Counter Inputs
Device Select inputs
Clock Calibration and Early
Power-Fail Output
Reset Input/Output
Early Power-fail Input
Crystal Connections
Serial Data
Serial Clock
Battery-Backup Supply
Supply Voltage
Ground
Ordering Information
Base Configuration Memory Size
FM31278
256Kb
256Kb
FM31276
64Kb
64Kb
Operating Voltage
4.0-5.5V
4.0-5.5V
4.0-5.5V
4.0-5.5V
Reset Threshold
3.9, 4.4V
3.9, 4.4V
3.9, 4.4V
3.9, 4.4V
Ordering Part Number
FM31278-G
FM31278-GTR (tape&reel)
FM31276-G
FM31276-GTR (tape&reel)
Document Number: 001-86393 Rev. *B
Page 2 of 26
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