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Linear Technology Electronic Components Datasheet

LTC4301LIDD Datasheet

Hot Swappable 2-Wire Bus Buffer

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FEATURES
Level Translates 1V Signals to Standard 3.3V and
5V Logic Rails
Allows Bus Pull-Up Voltages as Low as 1V on
SDAIN and SCLIN
Bidirectional Buffer* for SDA and SCL Lines
Increases Fanout
Prevents SDA and SCL Corruption During Live Board
Insertion and Removal from Backplane
Isolates Input SDA and SCL Line from Output
10kV Human Body Model ESD Protection
Supports Clock Stretching, Arbitration and
Synchronization
High Impedance SDA, SCL Pins for VCC = 0V
CS Gates Connection from Input to Output
Compatible with I2CTM, I2C Fast Mode and SMBus
Standards (Up to 400kHz Operation)
Small 8-Pin MSOUP and DFN (3mm × 3mm) Packages
APPLICATIO S
Hot Board Insertion
Servers
Capacitance Buffer/Bus Extender
Desktop Computers
LTC4301L
Hot Swappable 2-Wire
Bus Buffer with Low Voltage
Level Translation
DESCRIPTIO
The LTC®4301L hot swappable, 2-wire bus buffer allows
I/O card insertion into a live backplane without corruption
of the data and clock busses. In addition, the LTC4301L
SDAIN and SCLIN pins are compatible with systems with
pull-up voltages as low as 1V. Control circuitry prevents
the backplane from being connected to the card until a
stop bit or a bus idle is present. When the connection is
made, the LTC4301L provides bidirectional buffering,
keeping the backplane and card capacitances isolated.
When driven low, the CS input pin allows the part to
connect after a stop bit or bus idle occurs. Driving CS high
breaks the connection between SCLIN and SCLOUT and
between SDAIN and SDAOUT. A logic high on READY
indicates that the backplane and card sides are connected
together.
The LTC4301L is offered in 8-pin DFN (3mm × 3mm) and
MSOP packages.
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 7032051.
TYPICAL APPLICATIO
1.2V
VCC
SDA
µP
SCL
GND
3.3V
0.01µF
2k 2k
VCC
SDAIN SDAOUT
LTC4301L
SCLIN SCLOUT
CS
READY
GND
10k 10k
SDA
SCL
4301l TA01a
Input-Output Connection
OUTPUT
SIDE
20pF
0.5V/DIV
INPUT
SIDE
55pF
1µs/DIV
4301 TA01b
4301lfa
1


Linear Technology Electronic Components Datasheet

LTC4301LIDD Datasheet

Hot Swappable 2-Wire Bus Buffer

No Preview Available !

LTC4301L
ABSOLUTE MAXIMUM RATINGS (Note 1)
VCC to GND ................................................. –0.3V to 7V
SDAIN, SCLIN, SDAOUT, SCLOUT, CS ........ –0.3V to 7V
READY ........................................................ –0.3V to 6V
Operating Temperature Range
LTC4301LC ............................................. 0°C to 70°C
LTC4301LI .......................................... – 40°C to 85°C
Storage Temperature Range
MSOP ............................................... – 65°C to 150°C
DFN .................................................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
TOP VIEW
CS 1
8 VCC
SCLOUT 2
7 SDAOUT
9
SCLIN 3
6 SDAIN
GND 4
5 READY
DD PACKAGE
8-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 9) IS GND
PCB CONNECTION OPTIONAL
TOP VIEW
CS 1
SCLOUT 2
SCLIN 3
GND 4
8 VCC
7 SDAOUT
6 SDAIN
5 READY
MS8 PACKAGE
8-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA = 200°C/W
ORDER PART NUMBER
LTC4301LCDD
LTC4301LIDD
DD PART MARKING
LBHS
ORDER PART NUMBER
LTC4301LCMS8
LTC4301LIMS8
MS8 PART MARKING
LTBHQ
Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The indicates specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 2.7V to 5.5V, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN
TYP
MAX
Power Supply
VCC
Positive Supply Voltage
ICC
Supply Current
Start-Up Circuitry
2.7
5.5
VCC = 5.5V, VSDAIN = VSCLIN = 0V
VCC = 5.5V, CS = 5.5V
4.5
6.2
300
VPRE
tIDLE
RDYVOL
VTHRCS
ICS
Precharge Voltage
Bus Idle Time
READY Output Low Voltage
Connection Sense Threshold
CS Input Current
SDAOUT, SCLOUT Floating
IPULLUP = 3mA
CS from 0V to VCC
0.85
1.05
1.25
60
95
175
0.4
0.8
1.4
2
±0.1
±1
UNITS
V
mA
µA
V
µs
V
V
µA
4301lfa
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Part Number LTC4301LIDD
Description Hot Swappable 2-Wire Bus Buffer
Maker Linear
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