MAX6916 datasheet(6/28 Pages) MAXIM

Part #	MAX6916

Description	SPI-Compatible RTC with Microprocessor Supervisor, Alarm, and NV RAM Controller

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Manufacturer	MAXIM [Maxim Integrated Products]

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SPI-Compatible RTC with Microprocessor

Supervisor, Alarm, and NV RAM Controller

6

_______________________________________________________________________________________

Note 1: VRST is the reset threshold for VCC. See the Ordering Information.

Note 2: All parameters are 100% tested at TA = +85°C. Limits over temperature are guaranteed by design and are not production

tested.

Note 3: The SPI serial interface is operational for VCC > VRST.

Note 4: See the Detailed Description (VOUT function).

Note 5: ICCS is specified with CS = VCC, SCLK = DIN = WDI = CE_IN = GND, DOUT, VOUT, CE_OUT, and MR floating. IBATT is

specified with WDI =

CE_IN = SCLK = DIN = GND, CS = VCC, DOUT, VOUT, CE_OUT, and MR floating.

Note 6: ICCA is specified with SCLK = 4MHz for VCC = +5.5V and SCLK = 2MHz for VCC = +3.3V and +3.6V. DOUT = OPEN, CS =

GND, DIN = VCC, CE_IN = VCC, VOUT and CE_OUT open, WDI = VCC or GND.

Note 7: For OUT switchover to BATT, VCC must fall below VRST and VBATT. For OUT switchover to VCC, VCC must be above VRST or

above VBATT.

Note 8: Guaranteed by design. Not subject to production testing.

Note 9: All values are referred to VIH(MIN) and VIL(MAX) levels.

VCC-TO-OUT VOLTAGE vs. TEMPERATURE

TEMPERATURE (

°C)

60

35

10

-15

17.5

20.0

22.5

25.0

27.5

30.0

15.0

-40

85

VCC = 3V

VBATT = 0V

IOUT = 35mA

VCC = 3.3V

VBATT = 0V

IOUT = 35mA

BATT-TO-OUT VOLTAGE vs. TEMPERATURE

1

2

3

4

5

6

7

8

9

10

0

TEMPERATURE (

°C)

60

35

10

-15

-40

85

VCC = 0V

VBATT = 3V

IOUT = 800

µA

VCC = 0V

VBATT = 2V

IOUT = 400

µA

TIMEKEEPING CURRENT vs. TEMPERATURE

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

0.8

TEMPERATURE (

°C)

60

35

10

-15

-40

85

SCLK = GND, DOUT = OPEN

CS = VCC, DIN = GND

CE_IN = GND

XTAL FAIL ENABLED

TIMEKEEPING CURRENT vs. TEMPERATURE

0.9

1.0

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

0.8

TEMPERATURE (

°C)

60

35

10

-15

-40

85

SCLK = GND, DOUT = OPEN

CS = VCC, DIN = GND

CE_IN = GND

XTAL FAIL DISABLED

Typical Operating Characteristics

(VCC = 3.3V, VBATT = 3V, TA = +25°C, unless otherwise noted.)

AC ELECTRICAL CHARACTERISTICS (continued)

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

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Battery Test Cycle—Normal

tBTCN

(Note 8)

24

hr

Battery Test Pulse Width

tBTPW

(Note 8)

1

s

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