FM31T372 datasheet(21/26 Pages) RAMTRON

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FM31T372/374/376/378-G

Rev. 1.1

Apr. 2011

Page 21 of 26

Electrical Specifications

Absolute Maximum Ratings

Symbol

Description

Ratings

VDD

Power Supply Voltage with respect to VSS

-1.0V to +7.0V

VIN

Voltage on any signal pin with respect to VSS

-1.0V to +7.0V and

VIN ≤ VDD+1.0V *

VBAK

Backup Supply Voltage

-1.0V to +4.5V

TSTG

Storage Temperature

-55C to + 125C

TLEAD

Lead Temperature (Soldering, 10 seconds)

260 C

VESD

Electrostatic Discharge Voltage

- Human Body Model

(AEC-Q100-002 Rev. E)

- Charged Device Model

(AEC-Q100-011 Rev. B)

- Machine Model

(AEC-Q100-003 Rev. E)

2kV

1.25kV

100V

Package Moisture Sensitivity Level

MSL-1

* The “VIN < VDD+1.0V” restriction does not apply to the SCL and SDA inputs which do not employ a diode to VDD.

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 (TA = -40 C to + 85 C, VDD = 2.7V to 5.5V unless otherwise specified)

Symbol

Parameter

Min

Typ

Max

Units

Notes

VDD

Main Power Supply

2.7

5.5

IDD

VDD Supply Current

@ SCL = 100 kHz

@ SCL = 400 kHz

@ SCL = 1 MHz

500

900

1500

A

ISB

Standby Current

For VDD < 5.5V

For VDD < 3.6V

150

120

A

VBAK

RTC Backup Supply Voltage

@ TA = +25ºC to +85ºC

@ TA = -40ºC to +25ºC

1.55

1.9

3.75

IBAK

RTC Backup Supply Current

@ TA = +25ºC, VBAK = 3.0V

@ TA = +85ºC, VBAK = 3.0V

@ TA = +25ºC, VBAK = 2.0V

@ TA = +85ºC, VBAK = 2.0V

1.4

2.1

1.15

1.75

A

IBAKTC

Trickle Charge Current with VBAK=0V

Fast Charge Off (FC = 0)

Fast Charge On (FC = 1)

200

120

2500

A

VTP0

VDD Trip Point Voltage, VTP(1:0) = 00b

2.55

2.6

2.70

VTP1

VDD Trip Point Voltage, VTP(1:0) = 01b

2.80

2.9

3.00

VTP2

VDD Trip Point Voltage, VTP(1:0) = 10b

3.80

3.9

4.00

VTP3

VDD Trip Point Voltage, VTP(1:0) = 11b

4.25

4.4

4.50

VRST

VDD for valid /RST @ IOL = 80 A at VOL

VBAK > VBAK min

VBAK < VBAK min

1.6

ILI

Input Leakage Current

1

A

ILO

Output Leakage Current

1

A

VIL

Input Low Voltage

All inputs except those listed below

CNT1-2 battery backed (VDD < 2.4V)

CNT1-2 (VDD > 2.4V)

-0.3

0.3 VDD

0.5

0.8

continued

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