MAX6909 datasheet(2/33 Pages) MAXIM

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I2C-Compatible Real-Time Clocks with µP

Supervisor and NV RAM Controller

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ABSOLUTE MAXIMUM RATINGS

ELECTRICAL CHARACTERISTICS

(VCC = VCC(MIN) to VCC(MAX), TA = -40°C to +85°C, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1, 2)

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional

operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

All Voltages (with respect to GND)

BATT or VCC ..........................................................-0.3V to +6.0V

OUT, ALM, SCL, SDA, CX FAIL,

PFO, RESET.......................................................-0.3V to +6.0V

All Other Pins ............................................-0.3V to (VSUP + 0.3V)

(where VSUP is greater of VBATT or VCC)

Input Current

VCC ........................................................................……500mA

BATT .............................................................................100mA

GND ................................................................................20mA

Output Current

OUT Continuous............................................................450mA

All Other Outputs ............................................................20mA

Continuous Power Dissipation (TA = +70°C)

20-Pin QSOP (derate 9.1mW/°C above +70°C)...........727mW

Operating Temperature Range ...........................-40°C to +85°C

Junction Temperature ......................................................+150°C

Storage Temperature Range ............................ -65°C to +150°C

Lead Temperature (soldering, 10s) ................................ +300°C

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

MAX69__EO30 (Note 3)

2.7

3.3

Operating Voltage Range

VCC

MAX69__EO33 (Note 3)

3.0

3.6

MAX69__EO30 (Note 4)

2.0

3.6

Operating Voltage Range BATT

VBATT

MAX69__EO33 (Note 4)

2.0

3.6

VBATT = 2V, VCC = 0V

0.75

VBATT = 3V, VCC = 0V

0.95

BATT Current (Note 5)

IBATT

Crystal fail-

circuit disabled

VBATT = 3.6V, VCC = 0V

1.1

µA

VBATT = 2V, VCC = 0V

0.9

VBATT = 3V, VCC = 0V

Timekeeping Current (Note 5)

IBATT

Crystal fail-

circuit enabled

VBATT = 3.6V, VCC = 0V

µA

VCC = 3.3V, VBATT = 0V

0.14

Active Supply Current (Note 6)

ICCA

PZT disabled,

crystal-disabled

VCC = 3.6V, VBATT = 0V

0.15

VCC = 3.3V, VBATT = 0V

Standby Current (Note 5)

ICCS

PZT disabled,

crystal-disabled

VCC = 3.6V, VBATT = 0V

µA

VCC = 3.3V, VBATT = 0V

Standby Current (Note 5)

ICCS

Crystal fail-

circuit enabled

VCC = 3.6V, VBATT = 0V

µA

Trickle-Charge Diode Voltage

Drop (Two Diodes)

1.2

1.7

2.8

Trickle Charge Resistors

5.0

kΩ

OUT

VBATT = 3.0V, VCC = 0V, IOUT = 20mA

VBATT -

0.15

VBATT

- 0.1

OUT in Battery-Backup Mode

(Note 4)

VOUT

VBATT = 2.0V, VCC = 0V, IOUT 10mA

VBATT -

0.1

VBATT

- 0.05

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