FM31L278-G Ramtron, FM31L278-G Datasheet - Page 24

• 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

AC Test Conditions
Input Pulse Levels
Input rise and fall times
Input and output timing levels
Diagram Notes
All start and stop timing parameters apply to both read and write
cycles. Clock specifications are identical for read and write cycles.
Write timing parameters apply to slave address, word address, and
write data bits. Functional relationships are illustrated in the relevant
data sheet sections. These diagrams illustrate the timing parameters
only.
Read Bus Timing
Write Bus Timing
Rev. 2.0
Jan. 2011
SCL
SDA
SCL
SDA
t
SU:STA
Start
Start
t
t
SU:STO
BUF
Stop Start
0.5 V
0.1 V
10 ns
t
R
Stop Start
DD
DD
`
to 0.9 V
t
F
t
HIGH
t
DD
HD:STA
FM31L278/L276/L274/L272 - 3V I2C Companion
t
AA
t
SU:DAT
1/f
SCL
t
HD:DAT
Equivalent AC Load Circuit
t
Output
DH
t
LOW
t
AA
3.6V
Acknowledge
t
SU:DAT
t
HD:DAT
1066 Ω
100 pF
Acknowledge
t
SP
Page 24 of 26
t
SP