Digital Thermometers and Thermostats

with SPI/3-Wire Interface

3

AC ELECTRICAL CHARACTERISTICS: 3-WIRE INTERFACE

AC ELECTRICAL CHARACTERISTICS: SPI INTERFACE

AC ELECTRICAL CHARACTERISTICS: EEPROM

Note 1: All voltages are referenced to ground. Currents entering the IC are specified positive, and currents exiting the IC are negative.

Note 2: Logic 0 voltages are specified at a sink current of 3mA.

Note 3: Logic 1 voltages are specified at a source current of 1mA.

Note 6: Measured with 50pF load.

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Data to SCLK Setup

(Notes 5, 6)

35

ns

SCLK to Data Hold

(Notes 5, 6)

35

ns

SCLK to Data Valid

(Notes 5, 6, 7)

80

ns

SCLK Low Time

(Note 6)

100

ns

SCLK High Time

(Note 6)

100

ns

SCLK Frequency

(Note 6)

DC

5.0

MHz

SCLK Rise and Fall

200

ns

CE to SCLK Setup

(Note 6)

400

ns

SCLK to CE Hold

(Note 6)

100

ns

CE Inactive Time

(Note 6)

400

ns

CE to Output High-Z

(Notes 5, 6)

40

ns

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

EEPROM Write Cycle Time

-40NC to +85NC (Note 8)

15

ms

EEPROM Write Endurance

20,000

Cycles

80,000

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Data to SCLK Setup

(Notes 5, 6)

35

ns

SCLK to Data Hold

(Notes 5, 6)

35

ns

SCLK to Data Valid

(Notes 5, 6, 7)

80

ns

SCLK Low Time

(Note 6)

100

ns

SCLK High Time

(Note 6)

100

ns

SCLK Frequency

(Note 6)

DC

5.0

MHz

SCLK Rise and Fall

200

ns

CE to SCLK Setup

(Note 6)

400

ns

SCLK to CE Hold

(Note 6)

100

ns

CE Inactive Time

(Note 6)

400

ns

CE to Output High-Z

(Notes 5, 6)

40

ns

SCLK to Output High-Z

(Notes 5, 6)

40

ns