MAXQ2010-RFX+ datasheet(10/34 Pages) MAXIM

10 / 34 page

16-Bit Mixed-Signal Microcontroller

with LCD Interface

______________________________________________________________________________________

I2C ELECTRICAL CHARACTERISTICS

(VDVDD = VAVDD = 2.7V to 3.6V, TA = -40°C to +85°C.)

Note 19: Devices that use nonstandard supply voltages that do not conform to the intended I2C bus system levels must relate their

input levels to the voltage to which the pullup resistors RP are connected. See Figure 3.

Note 20: CB—Capacitance of one bus line in pF.

Note 21: The maximum fall time of 300ns for the SDA and SCL bus lines shown in the

I2C Bus Controller Timing table is longer than

the specified maximum tOF_I2C of 250ns for the output stages. This allows series protection resistors (RS) to be connected

between the SDA/SCL pins and the SDA/SCL bus lines as shown in the

I2C Bus Controller Timing (Acting as I2C Slave)

table without exceeding the maximum specified fall time. See Figure 3.

SDA

P6.7

SCL

P6.6

I2C

DEVICE

I2C

DEVICE

VDVDD

MAXQ2010

Figure 3. Series Resistors (RS) for Protecting Against High-Voltage Spikes

STANDARD MODE

FAST MODE

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

MAX

MIN

MAX

UNITS

Input Low Voltage (Note 19)

VIL_I2C

-0.5

0.3 x VDVDD

-0.5

0.3 x VDVDD

Input High Voltage (Note 19)

VIH_I2C

0.7 x VDVDD

0.7 x VDVDD VDVDD + 0.5V

Input Hysteresis (Schmitt)

VIHYS_I2C VDVDD > 2V

0.05 x VDVDD

Output Logic-Low (Open

Drain or Open Collector)

VOL_I2C

VDVDD > 2V, 3mA sink

current

0.4

Output Fall Time from

VIH_MIN to VIL_MAX with Bus

Capacitance from 10pF to

400pF (Notes 20, 21)

tOF_I2C

250

20 + 0.1CB

250

Pulse Width of Spike

Filtering That Must Be

Suppressed by Input Filter

tSP_I2C

Input Current on I/O

IIN_I2C

Input voltage from 0.1 x

VDVDD to 0.9 x VDVDD

-10

+10

-10

+10

μA

I/O Capacitance

CIO_I2C

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