FM31L278-G Ramtron, FM31L278-G Datasheet - Page 12

• 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

Register Description
Rev. 2.0
Jan. 2011
Address Description
18h
17h
16h
15h
14h
13h
12h
11h
10h
0Fh
0Eh
0Dh
Serial Number Byte 7
Upper byte of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 6
Byte 6 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 5
Byte 5 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 4
Byte 4 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 3
Byte 3 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 2
Byte 2 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 1
Byte 1 of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Serial Number Byte 0
LSB of the serial number. Read/write when SNL=0, read-only when SNL=1. Nonvolatile.
Counter 2 MSB
Event Counter 2 MSB. Increments on overflows from Counter 2 LSB. Battery-backed, read/write.
Counter 2 LSB
Event Counter 2 LSB. Increments on programmed edge event on CNT2 input or overflows from Counter 1 MSB
when CC=1. Battery-backed, read/write .
Counter 1 MSB
Event Counter 1 MSB. Increments on overflows from Counter 1 LSB. Battery-backed, read/write.
Counter 1 LSB
Event Counter 1 LSB. Increments on programmed edge event on CNT1 input. Battery-backed, read/write.
SN.63
SN.55
SN.47
SN.39
SN.31
SN.23
SN.15
C2.15
C1.15
SN.7
C2.7
C1.7
D7
D7
D7
D7
D7
D7
D7
D7
D7
D7
D7
D7
SN.62
SN.54
SN.46
SN.38
SN.30
SN.22
SN.14
C2.14
C1.14
SN.6
C2.6
C1.6
D6
D6
D6
D6
D6
D6
D6
D6
D6
D6
D6
D6
SN.61
SN.53
SN.45
SN.37
SN.29
SN.21
SN.13
C2.13
C1.13
SN.5
C2.5
C1.5
D5
D5
D5
D5
D5
D5
D5
D5
D5
D5
D5
D5
SN.60
SN.52
SN.44
SN.36
SN.28
SN.20
SN.12
C2.12
C1.12
SN.4
C2.4
C1.4
D4
D4
D4
D4
D4
D4
D4
D4
D4
D4
D4
D4
FM31L278/L276/L274/L272 - 3V I2C Companion
SN.59
SN.51
SN.43
SN.35
SN.27
SN.19
SN.11
C2.11
C1.11
SN.3
C2.3
C1.3
D3
D3
D3
D3
D3
D3
D3
D3
D3
D3
D3
D3
SN.58
SN.50
SN.42
SN.34
SN.26
SN.18
SN.10
C2.10
C1.10
SN.2
C2.2
C1.2
D2
D2
D2
D2
D2
D2
D2
D2
D2
D2
D2
D2
SN.57
SN.49
SN.41
SN.33
SN.25
SN.17
SN.9
SN.1
C2.9
C2.1
C1.9
C1.1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
D1
Page 12 of 26
SN.56
SN.48
SN.40
SN.32
SN.24
SN.16
SN.8
SN.0
C2.8
C2.0
C1.8
C1.0
D0
D0
D0
D0
D0
D0
D0
D0
D0
D0
D0
D0