FM31L278-G Ramtron, FM31L278-G Datasheet - Page 21

• 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

Electrical Specifications
Absolute Maximum Ratings
* PFI input voltage must not exceed 4.5V.
** The “V
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only,
and the functional operation of the device at these or any other conditions above those listed in the operational section of this
specification is not implied. Exposure to absolute maximum ratings conditions for extended periods may affect device reliability.
DC Operating Conditions
Rev. 2.0
Jan. 2011
Symbol
V
I
I
V
I
I
V
V
V
I
I
V
V
DD
SB
BAK
BAKTC
LI
LO
DD
BAK
TP1
TP2
RST
IL
IH
Symbol
T
V
IN
V
T
V
V
LEAD
BAK
STG
ESD
< V
DD
IN
Main Power Supply
V
Standby Current
RTC Backup Supply Voltage
RTC Backup Supply Current
Trickle Charge Current with V
V
V
V
Input Leakage Current
Output Leakage Current
Input Low Voltage
Input High Voltage
@ T
@ T
@ T
@ T
@ T
@ T
DD
@ SCL = 100 kHz
@ SCL = 400 kHz
@ SCL = 1 MHz
Fast Charge Off (FC = 0)
Fast Charge On (FC = 1)
DD
DD
DD
DD
V
V
All inputs except those listed below
CNT1-2 battery backed (V
All inputs except those listed below
PFI (comparator input)
CNT1-2 battery backed (V
CNT1-2 (V
CNT1-2 V
+1.0V” restriction does not apply to the SCL and SDA inputs which do not employ a diode to V
BAK
BAK
Supply Current
for valid /RST @ I
Trip Point Voltage, VTP = 0
Trip Point Voltage, VTP = 1
A
A
A
A
A
A
= +25ºC to +85ºC
= -40ºC to +25ºC
= +25ºC, V
= +85ºC, V
= +25ºC, V
= +85ºC, V
> V
< V
Description
Power Supply Voltage with respect to V
Voltage on any signal pin with respect to V
Backup Supply Voltage
Storage Temperature
Lead Temperature (Soldering, 10 seconds)
Electrostatic Discharge Voltage
Package Moisture Sensitivity Level
- Human Body Model (AEC-Q100-002 Rev. D)
- Charged Device Model (AEC-Q100-011 Rev. B)
- Machine Model (AEC-Q100-003 Rev. E)
BAK
BAK
DD
DD
min
min
> 2.5V
(T
> 2.5V)
Parameter
BAK
BAK
BAK
BAK
A
= -40° C to + 85° C, V
= 3.0V
= 3.0V
= 2.0V
= 2.0V
OL
= 80 µA at V
DD
DD
BAK
< 2.5V)
< 2.5V)
=0V
OL
DD
= 2.7V to 3.6V unless otherwise specified)
SS
V
0.7 V
0.7 V
BAK
FM31L278/L276/L274/L272 - 3V I2C Companion
SS
Min
1.55
2.55
2.85
200
-0.3
-0.3
-0.3
2.7
1.9
1.6
50
0
-
– 0.5
DD
DD
Typ
2.6
2.9
-
-
-1.0V to +5.0V * and
V
-55°C to + 125°C
IN
-1.0V to +5.0V
-1.0V to +4.5V
V
V
V
≤ V
0.3 V
BAK
DD
DD
Max
Ratings
1500
2500
3.75
3.75
1.15
1.75
2.70
3.00
3.75
1.25kV
MSL-2
500
900
120
120
260° C
3.6
1.4
2.1
0.5
0.8
±1
±1
100V
2kV
DD
+ 0.3
+ 0.3
+ 0.3
DD
DD
+1.0V **
.
Units
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
µA
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
Page 21 of 26
Notes
10
7
1
2
9
4
5
5
6
3
3
8