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Linear Technology Electronic Components Datasheet

LTC4310CMS-2 Datasheet

Hot-Swappable I2C Isolators

No Preview Available !

Features
n Bidirectional I2C Communication Between Two
Isolated Buses
n Full Isolation with Inexpensive Ethernet
Transformers or Capacitors
n Low Voltage Level Shifting
n I2C Maximum Operating Frequency:
100kHz for LTC4310-1
400kHz for LTC4310-2
n I2C Specification Compliant VOL, VIL
n ±5kV Human Body Model ESD Protection
n Rise Time Accelerators
n SDA, SCL Hot-Swapping
n Very Low Shutdown Current
n Stuck Bus Disconnect and Recovery
n Thermal Shutdown
n 10-Lead MSOP and 3mm × 3mm DFN Packages
Applications
n Isolated I2C, SMBus and PMBus Interfaces
n Isolated Power Supplies
n Positive-to-Negative Rail Communications
n Power-over-Ethernet
LTC4310-1/LTC4310-2
Hot-Swappable
I2C Isolators
Description
The LTC®4310 provides bidirectional I2C communications
between two I2C buses whose grounds are isolated from
one another. Each LTC4310 encodes I2C bus logic states
into signals that are transmitted across an isolation barrier
to another LTC4310. The receiving LTC4310 decodes the
transmission and drives its l2C bus to the appropriate logic
state. The isolation barrier can be bridged by an inexpensive
Ethernet, or other transformer, to achieve communications
across voltage differences reaching thousands of volts, or
it can be bridged by capacitors for lower voltage isolation.
The LTC4310-1 is intended for use in 100kHz I2C systems.
The LTC4310-2 is intended for 400kHz I2C systems.
Rise time accelerators provide strong pull-up currents on
SCL and SDA rising edges to meet rise time specifications
for heavily loaded systems. Data and clock Hot Swap™
circuitry prevent data corruption when a card is inserted
into or removed from a live bus. When a bus is stuck low
for 37ms, the LTC4310 turns off its pull-down devices
and generates up to sixteen clocks and a STOP bit in an
attempt to free the bus. Driving EN low sets the LTC4310
in a very low current shutdown mode to conserve power.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. Hot Swap is a trademark of Linear Technology Corporation. All other
trademarks are the property of their respective owners.
Typical Application
1500V Isolated I2C System
10/100Base-TX
3.3V
0.01µF
ETHERNET TRANSFORMER
0.01µF
VCC TXP
RXP VCC
3.3k
3.3k
SDA1
SCL1
LTC4310-1
SDA TXN
SCL RXP
EN
READY
0.01µF
GND RXN
EPF8119S
0.01µF
3.3k
LTC4310-1
RXN SDA
TXP SCL
EN
READY
TXN GND
431012 TA01a
ISOLATED
5V
LTC4310 Operating Through
20kV/µs Common Mode Transient
SCL
3.3k
0V
SDA
2V/DIV
SDA2
SCL2
20kV/µs
0V
2µs/DIV
500V/
DIV
431012 TA01b
431012fa
1


Linear Technology Electronic Components Datasheet

LTC4310CMS-2 Datasheet

Hot-Swappable I2C Isolators

No Preview Available !

LTC4310-1/LTC4310-2
Absolute Maximum Ratings (Notes 1, 4)
Input Supply Voltage (VCC)........................... –0.3V to 6V
Input and Bidirectional Pin Voltages
SCL, SDA, EN, RXP, RXN........................... –0.3V to 6V
Output Voltages
READY...................................................... –0.3V to 6V
TXP, TXN....................... –0.3V to VCC + 0.3V (6V Max)
Maximum Sink Current (SDA, SCL, READY)...........30mA
Operating Ambient Temperature Range
LTC4310C................................................. 0°C to 70°C
LTC4310I.............................................. –40°C to 85°C
Storage Temperature Range
DD...................................................... –65°C to 125°C
MS...................................................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS Package....................................................... 300°C
Pin Configuration
TOP VIEW
EN 1
10 RXN
SDA 2
9 RXP
SCL 3
11
GND
8 VCC
READY 4
7 TXP
GND 5
6 TXN
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 11) PCB CONNECTION TO GROUND IS OPTIONAL
EN 1
SDA 2
SCL 3
READY 4
GND 5
TOP VIEW
10 RXN
9 RXP
8 VCC
7 TXP
6 TXN
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 150°C, θJA = 120°C/W
order information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING*
PACKAGE DESCRIPTION
TEMPERATURE RANGE
LTC4310CDD-1#PBF
LTC4310CDD-1#TRPBF LFCH
10-Lead (3mm × 3mm) Plastic DFN
0°C to 70°C
LTC4310IDD-1#PBF
LTC4310IDD-1#TRPBF LFCH
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LTC4310CMS-1#PBF
LTC4310CMS-1#TRPBF LTFCG
10-Lead Plastic MSOP
0°C to 70°C
LTC4310IMS-1#PBF
LTC4310IMS-1#TRPBF LTFCG
10-Lead Plastic MSOP
–40°C to 85°C
LTC4310CDD-2#PBF
LTC4310CDD-2#TRPBF LFCK
10-Lead (3mm × 3mm) Plastic DFN
0°C to 70°C
LTC4310IDD-2#PBF
LTC4310IDD-2#TRPBF LFCK
10-Lead (3mm × 3mm) Plastic DFN
–40°C to 85°C
LTC4310CMS-2#PBF
LTC4310CMS-2#TRPBF LTFCJ
10-Lead Plastic MSOP
0°C to 70°C
LTC4310IMS-2#PBF
LTC4310IMS-2#TRPBF LTFCJ
10-Lead Plastic MSOP
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
431012fa
2


Part Number LTC4310CMS-2
Description Hot-Swappable I2C Isolators
Maker Linear
PDF Download

LTC4310CMS-2 Datasheet PDF






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