LT3960

5

Rev. B

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SWITCHING CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Transceiver Timing

fSCL

SCL Clock Frequency (Notes 5,6)

l

0

400

kHz

tPI2CBD

I2C to I2CAN Dominant Propagation Delay

(Figure 2, Figure 3)

VCC = 3.3V

l

45

80

130

ns

VCC = 5V

l

45

75

115

ns

tPI2CBR

I2C to I2CAN Recessive Propagation Delay

(Figure 2, Figure 3)

VCC = 3.3V

l

80

120

170

ns

VCC = 5V

l

60

90

120

ns

tPBI2CD

I2CAN Dominant to I2C Propagation Delay

(Figure 2, Figure 3)

VCC = 3.3V

l

25

40

65

ns

VCC = 5V

l

25

40

65

ns

tPBI2CR

I2CAN Recessive to I2C Propagation Delay

(Figure 2, Figure 3)

VCC = 3.3V

l

25

45

80

ns

VCC = 5V

l

20

35

60

ns

tTO;CAN

I2CAN Dominant Timeout Time

(Figure 2, Figure 4)

l

0.5

1.5

2

ms

tEN;I2C

I2C Driver Enable from Shutdown

VCC = 3.3V or 5V (Figure 2, Figure 5)

l

40

µs

tEN;CAN

I2CAN Driver Enable from Shutdown

VCC = 3.3V or 5V (Figure 2, Figure 6)

l

40

µs

tSHDN;I2C

Time to Shutdown, I2C

(Figure 2, Figure 5)

l

500

ns

tSHDN;CAN

Time to Shutdown, I2CAN

(Figure 2, Figure 6)

l

500

ns

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VIN = 12V, VCC = 3.3V, Figure 2 applies with RPU = 4.99k, RL = 60Ω,

EN/MODE = VCC, TYP values unless otherwise specified.

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT3960E is guaranteed to meet specified performance

from 0°C to 125°C. Specifications over the –40°C to 125°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls. The LT3960J is guaranteed to meet

performance specifications over the full –40°C to 150°C operating

junction temperature range. High junction temperatures degrade operating

lifetimes. Operating lifetime is derated at junction temperatures greater

than 125°C.

Note 3: The LT3960 includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperature will exceed the maximum operating junction temperature

when overtemperature is active. Continuous operating above the specified

maximum operating junction temperature may impair device reliability.

Note 4: Pin capacitance given for reference only and is not tested in

production.

Note 5: Rise and fall times are measured at 30% and 70% levels.

Note 6: Maximum SCL clock frequency will be affected by delays through

the twisted-pair interface and I/O circuitry of other devices on the bus.

These delays may limit the operation frequency to below the LT3960

maximum specification.

Note 7: The LT3960 does not support clock stretching. SCL should not be

pulled low by slave devices.