Low-Voltage SPI/3-Wire RTCs with

Trickle Charger

8

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CAPACITANCE

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Capacitance on All Input Pins

10

pF

Capacitance on All Output Pins

(High Impedance)

10

pF

is in write protection.

Note 1:

Limits at -40°C are guaranteed by design and not production tested.

Note 2:

All voltages are referenced to ground.

Note 3:

The use of the 250

Note 4:

Note 5:

Note 6:

Note 7:

SCLK, DIN, CS on DS1390/DS1391; SCLK, and CE on DS1392/DS1393.

Note 8:

DOUT, SQW/INT (DS1390/DS1393), SQW, and INT (DS1392).

Note 9:

The RST pin has an internal 50k

inactive. Outputs are open.

Note 11: Specified with bus inactive.

Note 13: With 50pF load.

0

Note 17: This delay applies only if the oscillator is enabled and running. If the EOSC bit is 1, the startup time of the oscillator is

added to this delay.

≥

≥

≥

≥