FM31L278-G Ramtron, FM31L278-G Datasheet - Page 23

• 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

Supervisor Timing
Notes
1
2
3
/RST Timing
Data Retention
Rev. 2.0
Jan. 2011
t
t
t
t
t
t
f
Symbol
T
Symbol
VDD
RPU
RNR
VR
VF
WDP
WDOG
CNT
VTP
VRST
RST
DR
This parameter is characterized but not tested.
Slope measured at any point on V
t
DOG
is the programmed time in register 0Ah, V
/RST Active (low) after V
V
V
V
Pulse Width of /RST for Watchdog Reset
Timeout of Watchdog
Frequency of Event Counters
DD
DD
DD
Parameter
Data Retention
@ +75°C
@ +80°C
@ +85°C
(V
< V
Rise Time
Fall Time
DD
(T
TP
= 2.7V to 3.6V)
A
noise immunity
t
= -40° C to + 85° C, V
RNR
Parameter
DD
waveform.
DD
>V
TP
DD
DD
= 2.7V to 3.6V)
> V
TP
and t
RPU
satisfied.
FM31L278/L276/L274/L272 - 3V I2C Companion
t
RPU
Min
t
100
100
100
Min
DOG
10
50
38
19
10
0
2*t
Max
200
200
Units
Years
Years
Years
25
10
-
-
DOG
Units
MHz
µs/V
µs/V
ms
ms
ms
µs
Notes
Page 23 of 26
Notes
1,2
1,2
1
3