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FM31L278 Fiches technique(PDF) 2 Page - Ramtron International Corporation

No de pièce FM31L278
Description  3V Integrated Processor Companion with Memory
Download  26 Pages
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Fabricant  RAMTRON [Ramtron International Corporation]
Site Internet  http://www.ramtron.com
Logo RAMTRON - Ramtron International Corporation

FM31L278 Fiches technique(HTML) 2 Page - Ramtron International Corporation

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FM31L278/L276/L274/L272 - 3V I2C Companion
Rev. 2.1
Sept. 2011
Page 2 of 26
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
Pin Name
Function
CNT1, CNT2
Event Counter Inputs
A0, A1
Device Select inputs
CAL/PFO
Clock Calibration and Early
Power-Fail Output
/RST
Reset Input/Output
PFI
Early Power-fail Input
X1, X2
Crystal Connections
SDA
Serial Data
SCL
Serial Clock
VBAK
Battery-Backup Supply
VDD
Supply Voltage
VSS
Ground
Ordering Information
Base Configuration
Memory Size
Operating Voltage
Reset Threshold
Ordering Part Number
FM31L278
256Kb
2.7-3.6V
2.6V, 2.9V
FM31L278-G
256Kb
2.7-3.6V
2.6V, 2.9V
FM31L278-GTR (tape&reel)
FM31L276
64Kb
2.7-3.6V
2.6V, 2.9V
FM31L276-G
64Kb
2.7-3.6V
2.6V, 2.9V
FM31L276-GTR (tape&reel)
FM31L274 *
16Kb
2.7-3.6V
2.6V, 2.9V
FM31L274-G
16Kb
2.7-3.6V
2.6V, 2.9V
FM31L274-GTR (tape&reel)
FM31L272 *
4Kb
2.7-3.6V
2.6V, 2.9V
FM31L272-G
4Kb
2.7-3.6V
2.6V, 2.9V
FM31L272-GTR (tape&reel)
* The FM31L274 and FM31L272 devices are EOL as of Sept. 2011.
VDD
VBAK
SCL
SDA
VSS
X1
X2
CAL/PFO
CNT1
PFI
RST
A0
A1
CNT2
1
2
3
4
5
6
7
14
13
12
11
10
9
8


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