LTC4310C 데이터 시트보기 (PDF) - Linear Technology

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LTC4310C

Hot-Swappable I2C Isolators

Linear Technology 

LTC4310-1/LTC4310-2

Pin Functions

EN (Pin 1): Device Enable Input. Pulling EN up to VCC

sets the device in normal operation mode, allowing bus

information to be sent and received across the barrier.

Grounding EN disables communication across the bar-

rier and debiases all internal circuitry, setting the device

in a very low current shutdown mode. Connect to VCC if

unused.

SDA (Pin 2): Serial Bus Data Input/Output. This is the

bidirectional data line for the two-wire bus. An external

pull-up resistor or current source from SDA to a supply

voltage greater than or equal to the VCC voltage is required.

See the Applications Information section for guidance

on selecting the resistor or current source value. Do not

leave open.

SCL (Pin 3): Serial Bus Clock Input/Output. This is the

bidirectional clock line for the two-wire bus. An external

pull-up resistor or current source from SCL to a supply

voltage greater than or equal to the VCC voltage is required.

See the Applications Information section for guidance

on selecting the resistor or current source value. Do not

leave open.

READY (Pin 4): Device Receiving Indicator Output. READY

is an open-drain digital output that pulls low when the

LTC4310 is driving its SDA and SCL pins with the logic

state information it is receiving on its RXP and RXN pins.

Connect this pin to VCC with a 10k resistor. This pin can

be left open or tied to GND if unused.

GND (Pin 5): Device Ground.

TXN (Pin 6): Negative Transmit Output. Tie TXN to the

negative side of the transformer primary winding or to the

RXN pin of another LTC4310 through a ceramic capacitor.

See the Applications Information section for guidance in

selecting the capacitor value. Do not leave open.

TXP (Pin 7): Positive Transmit Output. Tie TXP to the

positive side of the transformer primary winding or to the

RXP pin of another LTC4310 through a ceramic capacitor.

See the Applications Information section for guidance in

selecting the capacitor value. Do not leave open.

VCC (Pin 8): Device Power Supply Input. Connect a by-

pass capacitor of at least 0.01µF directly between VCC

and GND.

RXP (Pin 9): Positive Receive Input. Tie RXP to the posi-

tive side of the transformer secondary winding or to the

TXP pin of another LTC4310 through a ceramic capacitor.

See the Applications Information section for guidance in

selecting the capacitor value. Do not leave open.

RXN (Pin 10): Negative Receive Input. Tie RXN to the nega-

tive side of the transformer secondary winding or to the

TXN pin of another LTC4310 through a ceramic capacitor.

See the Applications Information section for guidance in

selecting the capacitor value. Do not leave open.

Exposed Pad (Pin 11) DFN Package Only: The exposed

pad may be left open or connected to device ground.

431012fa

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