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LTC4300-2CMS8#PBF

Description
IC ACCELERATOR I2C HOTSWAP 8MSOP
CategoryPower/power management    The power supply circuit   
File Size728KB,18 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Environmental Compliance
Download Datasheet Parametric View All

LTC4300-2CMS8#PBF Overview

IC ACCELERATOR I2C HOTSWAP 8MSOP

LTC4300-2CMS8#PBF Parametric

Parameter NameAttribute value
Brand NameLinear Technology
Is it Rohs certified?conform to
MakerLinear ( ADI )
Parts packaging codeMSOP
package instructionTSSOP,
Contacts8
Manufacturer packaging codeMS8
Reach Compliance Codecompliant
ECCN codeEAR99
Adjustable thresholdNO
Analog Integrated Circuits - Other TypesPOWER SUPPLY SUPPORT CIRCUIT
JESD-30 codeS-PDSO-G8
JESD-609 codee3
length3 mm
Humidity sensitivity level1
Number of channels1
Number of functions2
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Package body materialPLASTIC/EPOXY
encapsulated codeTSSOP
Package shapeSQUARE
Package formSMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.1 mm
Maximum supply voltage (Vsup)5.5 V
Minimum supply voltage (Vsup)2.7 V
Nominal supply voltage (Vsup)3.3 V
surface mountYES
technologyCMOS
Temperature levelCOMMERCIAL
Terminal surfaceMatte Tin (Sn)
Terminal formGULL WING
Terminal pitch0.65 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3 mm
FeaTures
n
n
LTC4300-1/LTC4300-2
Hot Swappable
2-Wire Bus Buffers
DescripTion
The
LTC
®
4300
series hot swappable 2-wire bus buffers
allow I/O card insertion into a live backplane without cor-
ruption of the data and clock busses. When the connection
is made, the LTC4300-1/LTC4300-2 provide bidirectional
buffering, keeping the backplane and card capacitances
isolated. Rise time accelerator circuitry* allows the use of
weaker DC pull-up currents while still meeting rise time
requirements. During insertion, the SDA and SCL lines are
precharged to 1V to minimize bus disturbances.
The LTC4300-1 incorporates a CMOS threshold digital
ENABLE input pin, which forces the part into a low current
mode when driven to ground and sets normal operation
when driven to V
CC
. It also includes an open drain READY
output pin, which indicates that the backplane and card
sides are connected together. The LTC4300-2 replaces
the ENABLE pin with a dedicated supply voltage pin, V
CC2
,
for the card side, providing level shifting between 3.3V
and 5V systems. Both the backplane and card may be
powered with supply voltages ranging from 2.7V to 5.5V,
with no constraints on which supply voltage is higher.
The LTC4300-2 also replaces the READY pin with a digital
CMOS input pin, ACC, which enables and disables the rise
time accelerator currents.
The LTC4300 is available in a small 8-lead MSOP package.
n
n
n
n
n
n
n
n
n
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 Lines From Output
Compatible with I
2
C, I
2
C Fast Mode and SMBus
Standards (Up to 400kHz Operation)
Low I
CC
Chip Disable: <1µA (LTC4300-1)
READY Open-Drain Output (LTC4300-1)
1V Precharge on All SDA and SCL Lines
Supports Clock Stretching, Arbitration and
Synchronization
5V to 3.3V Level Translation (LTC4300-2)
High Impedance SDA, SCL Pins for V
CC
= 0V
Small MSOP 8-Lead Package
applicaTions
n
n
n
n
Hot Board Insertion
Servers
Capacitance Buffer/Bus Extender
Desktop Computer
L,
LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
Hot Swap and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks
are the property of their respective owners. *Protected by U.S. Patents, including 6650174.
Typical applicaTion
V
CC
3.3V
R1
24k
SCLIN
C2*
R2
24k
3
8
2
C1
0.01µF
R3
24k
R4
24k
SCLOUT
C4*
OUTPUT SIDE
50pF
0.5V/DIV
INPUT SIDE
150pF
Input–Output Connection t
PLH
SDAIN
C3*
6
7
C5*
LTC4300-1
5
ENABLE
READY
GND
4
SDAOUT
1
*CAPACITORS NOT REQUIRED
IF BUS IS SUFFICIENTLY LOADED
200ns/DIV
430012 TA01b
430012 TA01a
430012fb
For more information
www.linear.com/LTC4300-1
1
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