LTC4311 데이터 시트보기 (PDF) - Linear Technology

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LTC4311

Low Voltage I2C/SMBus Accelerator

Linear Technology 

LTC4311

PIN FUNCTIONS

BUS1: Active Pull-up for Bus. Connect to either clock line

or data line for 2-wire bus.

BUS2: Active Pull-up for Bus. Connect to either clock line

or data line for 2-wire bus.

ENABLE: Device Enable Input. This is a 1V nominal digital

threshold input pin. For normal operation drive ENABLE

to a voltage greater than 1.5V. Driving ENABLE below the

0.4V threshold puts the device in a low (<5μA) current

shutdown mode and puts the BUS pins in a high imped-

ance state. If unused, connect to VCC.

EXPOSED PAD (DFN Package Only): Exposed Pad may

be left open or connected to device ground.

GND: Device Ground. Connect this pin to a ground plane

for best results.

VCC: Supply Voltage Input. Connect this pin to bus supply

and place a bypass capacitor of at least 0.01μF close to

VCC for best results.

BLOCK DIAGRAM

BUS1

BUS2

ENABLE

5mA

SLEW RATE

DETECTOR

5mA

SLEW RATE

DETECTOR

+

VTHR

–

+

VTHR

–

+

VCC – 0.4

–

+

VCC – 0.4

–

+

1V

–

VCC

CONTROL

LOGIC AND

INTERNAL SLEW

COMPARATOR

GND

4311 BD

4311fa

5

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