FM31L278-G Ramtron, FM31L278-G Datasheet - Page 2

• Manufacturer Part Number: FM31L278-G
• Description: FRAM, MPU SUPPORT, 256K, RTC, SOIC14
• Manufacturer: Ramtron

Specifications of FM31L278-G

• Memory Size: 256Kbit
• Nvram Features: RTC
• Supply Voltage Range: 2.7V To 3.6V
• Memory Case Style: SOIC
• No. Of Pins: 14
• Operating Temperature Range: -40°C To +85°C
• Package / Case: SOIC
• Mounting Style: SMD/SMT
• Memory Configuration: 32768 X 8
• Interface Type: I2C, Serial, 2-Wire
• Rohs Compliant: Yes
• Number Of Voltages Monitored: 1
• Monitored Voltage: 2.6 V or 2.9 V
• Output Type: Active Low, Open Drain
• Manual Reset: Resettable
• Watchdog: Watchdog
• Battery Backup Switching: Yes
• Power-up Reset Delay (typ): 200 ms
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Supply Current (typ): 1500 uA
• Power Fail Detection: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pin Configuration
Rev. 2.0
Jan. 2011
CAL/PFO
Ordering Information
Base Configuration
FM31L278
FM31L276
FM31L274
FM31L272
CNT2
CNT1
RST
VSS
A0
A1
Other memory configurations may be available. Please contact the factory for more information.
1
2
3
4
5
6
7
Memory Size
256Kb
256Kb
64Kb
64Kb
16Kb
16Kb
14
13
12
11
10
4Kb
4Kb
9
8
VBAK
PFI
VDD
SCL
SDA
X2
X1
Operating Voltage
2.7-3.6V
2.7-3.6V
2.7-3.6V
2.7-3.6V
2.7-3.6V
2.7-3.6V
2.7-3.6V
2.7-3.6V
Pin Name
CNT1, CNT2
A0, A1
CAL/PFO
/RST
PFI
X1, X2
SDA
SCL
VBAK
VDD
VSS
Reset Threshold
FM31L278/L276/L274/L272 - 3V I2C Companion
2.6V, 2.9V
2.6V, 2.9V
2.6V, 2.9V
2.6V, 2.9V
2.6V, 2.9V
2.6V, 2.9V
2.6V, 2.9V
2.6V, 2.9V
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
FM31L278-G
FM31L278-GTR (tape&reel)
FM31L276-G
FM31L276-GTR (tape&reel)
FM31L274-G
FM31L274-GTR (tape&reel)
FM31L272-G
FM31L272-GTR (tape&reel)
Ordering Part Number
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