LTC4301CMS8 Linear Technology, LTC4301CMS8 Datasheet

IC BUFFER BUS HOTSWAP 2WR 8MSOP

LTC4301CMS8

Manufacturer Part Number
LTC4301CMS8
Description
IC BUFFER BUS HOTSWAP 2WR 8MSOP
Manufacturer
Linear Technology
Type
Hot-Swap Switchr
Datasheet

Specifications of LTC4301CMS8

Applications
General Purpose, Buffer/Bus Extender
Internal Switch(s)
Yes
Voltage - Supply
2.7 V ~ 5.5 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LTC4301CMS8
Manufacturer:
LT
Quantity:
10 000
Part Number:
LTC4301CMS8#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC4301CMS8#PBF
Quantity:
258
Part Number:
LTC4301CMS8#TRPBF
Manufacturer:
MAXIM
Quantity:
6 220
Part Number:
LTC4301CMS8#TRPBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LTC4301CMS8#TRPBF
Quantity:
2 430
FEATURES
TYPICAL APPLICATIO
BACK_SDA
APPLICATIO S
BACK_SCL
Allows Bus Pull-Up Voltages Above or Below V
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
1V Precharge On All SDA and SCL Lines
Supports Clock Stretching, Arbitration and
Synchronization
High Impedance SDA, SCL Pins for V
CS Gates Connection from Input to Output
Compatible with I
Standards (Up to 400kHz Operation)
Small 8-Pin MSOP and DFN (3mm × 3mm) Packages
Hot Board Insertion
Servers
Capacitance Buffer/Bus Extender
Desktop Computers
CompactPCI
3.3V
10k
5V
10k
TM
CONNECTOR
BACKPLANE
and ATCA Systems
U
2
C
TM
, I
2
C Fast Mode and SMBus
U
5V
CC
10k
0.01µF
= 0V
SCLIN
SDAIN
CS
LTC4301
CARD
GND
V
CC
CC
SDAOUT
SCLOUT
READY
4301
TA01
DESCRIPTIO
The LTC
bus buffer allows I/O card insertion into a live backplane
without corruption of the data and clock busses. In addi-
tion, the LTC4301 allows the V
up voltage and the SDAOUT and SCLOUT pull-up voltage
to be independent from each other. Control circuitry
prevents the backplane from being connected to the card
until a stop bit or a bus idle is present. When the connec-
tion is made, the LTC4301 provides bidirectional buffer-
ing, keeping the backplane and card capacitances isolated.
During insertion, the SDA and SCL lines are precharged to
1V to minimize bus disturbances. 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 be-
tween SCLIN and SCLOUT and between SDAIN and
SDAOUT. The READY output pin indicates that the back-
plane and card sides are connected together.
The LTC4301 is offered in 8-pin DFN (3mm × 3mm) and
MSOP packages.
All other trademarks are the property of their respective owners.
Protected by U.S. Patents including 7032051.
Swappable 2-Wire Bus Buffer
10k
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
10k
CARD_SCL
CARD_SDA
®
Supply Independent Hot
4301 supply independent, hot swappable, 2-wire
OUTPUT
1V/DIV
SIDE
20pF
U
Input-Output Connection
CC
, SDAIN and SCLIN pull-
1µs/DIV
LTC4301
4301 TA01b
INPUT
SIDE
55pF
4301fb
1

Related parts for LTC4301CMS8

LTC4301CMS8 Summary of contents

Page 1

... The LTC4301 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. ...

Page 2

... A CC CONDITIONS V = 5.5V SDAIN SCLIN V = 5.5V 5.5V CC SDA, SCL Floating I = 3mA PULLUP CS from Rising Edge (Note 3) ORDER PART NUMBER TOP VIEW LTC4301CMS8 LTC4301IMS8 7 SDAOUT SDAIN 4 5 READY MS8 PART MS8 PACKAGE MARKING* 8-LEAD PLASTIC MSOP = 125°C, θ = 200°C/W JMAX JA ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T SYMBOL PARAMETER Input-Output Connection V Input-Output Offset Voltage OS C Digital Input Capacitance SDAIN, SDAOUT, IN SCLIN, SCLOUT I Input Leakage Current LEAK V Output Low Voltage, Input = 0V OL ...

Page 4

LTC4301 CTIO S CS (Pin 1): The connection sense pin is a 1.4V threshold digital input pin. For normal operation CS is grounded. Driving CS above the 1.4V threshold isolates SDAIN from SDAOUT and SCLIN ...

Page 5

U OPERATIO Start-Up When the LTC4301 first receives power on its V either during power-up or live insertion, it starts in an undervoltage lockout (UVLO) state, ignoring any activity on the SDA or SCL pins until V rises above 2.5V ...

Page 6

LTC4301 U OPERATIO There is a finite high to low propagation delay through the connection circuitry for falling waveforms. Figure 2 shows the falling edge waveforms for the same pull-up resistors and equivalent capacitance conditions as used in Figure 1. ...

Page 7

... V SDA and SCL are medium length pins to ensure that the V and GND pins make contact first. This will allow the CC precharge circuitry to be activated on SDA and SCL before Hot Swap is a trademark of Linear Technology Corporation. 10k CS SDAIN SCLIN 10k ...

Page 8

LTC4301 U U APPLICATIO S I FOR ATIO they make contact short pin that is pulled up when not connected. This is to ensure that the connection between the backplane and the cards data and clock busses ...

Page 9

U U APPLICATIO S I FOR ATIO BACKPLANE CONNECTOR BACKPLANE CC2 R1 R2 10k 10k SDA SCL Figure 5. Inserting Multiple I/O Cards into a Live Backplane Using the LTC4301 in a PCI System filter to prevent ...

Page 10

LTC4301 U U APPLICATIO S I FOR ATIO V CC1 V CC2 R1 R4 LTC4301 10k 10k CS SDA1 SDAIN SCL1 SCLIN TO OTHER SYSTEM 1 DEVICES V (BUS) CC SDA SCL CC3 0.01µ ...

Page 11

... TYP RECOMMENDED SOLDER PAD LAYOUT Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights Package 8-Lead Plastic DFN (3mm × ...

Page 12

... LTC4300A-1/LTC4300A-2 Hot Swappable 2-Wire Bus Buffer LTC4301L Hot Swappable 2-Wire Bus Buffer with Low Voltage Level Translation LTC4302-1/LTC4302-2 Addressable 2-Wire Bus Buffer ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 12 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● ...

Related keywords