ltc4310-1 Linear Technology Corporation, ltc4310-1 Datasheet - Page 16

• Manufacturer Part Number: ltc4310-1
• Description: Ltc4310-1/ltc4310-2 Hot-swappable I2c Isolators Features
• Manufacturer: Linear Technology Corporation

LTC4310-1/LTC4310-2
LTC4310 Compatibility with Other LTC Bus Buffers
The LTC4310 cannot be used on the same I
LTC4300A-1, LTC4303 or LTC4307. During rising edges,
the rise time accelerators of these buffers turn on before
the LTC4310 disables its rise rate regulation circuitry,
resulting in nonmonotonic bus edges.
The LTC4310-1 is compatible with the LTC4301 and
LTC4301L. It is also compatible with the LTC4302, LTC4304,
LTC4305 and LTC4306, provided that the rise time accelera-
tors of these buffers are permanently disabled. All of the
previously mentioned buffers are incompatible with the
LTC4310-2 because the compensation networks of these
buffers cause the bus to rise more slowly than (0.35 •
V
to control the bus rise rate.
LTC4310-1 Compatibility with LTC4310-2
In a typical application such as shown in Figure 1, an
LTC4310-1 can be used on one bus and an LTC4310-2 can
be used on the other, provided that the bus pull-up resis-
tors connected to the LTC4310-1 meet the requirements

applicaTions inForMaTion
CC
)/300ns, therefore the LTC4310-2 would not be able
2
C bus with the
of Figure 2, and the bus pull-up resistors connected to the
LTC4310-2 meet the requirements of Figure 3. However,
the bus switching frequency is limited by the rise rate
regulation circuitry of the LTC4310-1. In addition, significant
skew is introduced on the rising edges due to the large
difference in the controlled rise rates of the two buses. For
this reason, it is recommended to use two LTC4310-1’s
in SMBus and standard mode I
two LTC4310-2’s in fast mode I
The LTC4310-1 cannot be used on the same physical I
bus with the LTC4310-2, because the LTC4310-1’s rise
rate regulation circuitry controls the bus rise rate to (0.35
• V
to control the bus rise rate.
Using the LTC4310-1 at Frequencies Above 100kHz
Users who implement custom two-wire buses may use the
LTC4310-1 at bus frequencies above 100kHz provided that
all other devices on the bus can tolerate the approximately
1µs bus rise times resulting from the LTC4310-1’s bus rise
rate regulation circuitry.
CC
)/900ns, therefore the LTC4310-2 would not be able
2
2
C applications and to use
C applications.
431012f
2
C