900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Linear Technology Electronic Components Datasheet

LTC4304CMS Datasheet

Hot Swappable 2-Wire Bus Buffer

No Preview Available !

FEATURES
Automatic Disconnect of SDA/SCL Lines when Bus
is Stuck Low for ≥30ms
Fault Flag for Stuck Bus
Recovers Stuck Busses with Automatic Clocking*
Bidirectional Buffer* for SDA and SCL Lines
Increases Fanout
Prevents SDA and SCL Corruption During Live
Board Insertion and Removal from Backplane
Allows Bus Pullup Voltages Above and Below VCC
±15kV Human Body Model ESD Protection
Isolates Input SDA and SCL Lines from Output
Compatible with I2CTM, I2C Fast-Mode and SMBus
Standards (Up to 400kHz Operation)
READY Open Drain Output
1V Precharge on All SDA and SCL Lines
High Impedance SDA, SCL Pins for VCC = 0V
ENABLE Gates Connection from Input to Output
MSOP
10-Pin
and DFN
U
(3mm
×
3mm)
Packages
APPLICATIO S
Hot Board Insertion
Servers
Capacitance Buffer/Bus Extender
RAID Systems
LTC4304
Hot Swappable 2-Wire
Bus Buffer with Stuck
Bus Recovery
DESCRIPTIO
The LTC®4304 hot swappable 2-wire bus buffer allows I/O
card insertion into a live backplane without corruption of
the data and clock busses. When a connection is made,
the LTC4304 provides bidirectional buffering, keeping the
backplane and card capacitances isolated. If SDAOUT or
SCLOUT is low for ≥30ms (typ), the LTC4304 automatically
breaks the data and clock bus connection and FAULT will
pull low. At this time the LTC4304 automatically generates
up to 16 clock pulses on SCLOUT in an attempt to free the
bus. A connection will be enabled automatically when the
bus becomes free. A logic low on the ACC input enables
the LTC4304’s rise-time accelerators. A logic high on ACC
disables the rise-time accelerators, which allows SDA and
SCL bus pull-up voltages below VCC.
During insertion, the SDA and SCL lines are precharged
to 1V to minimize bus disturbances. When driven high,
ENABLE allows the LTC4304 to connect after a stop bit or
bus idle occurs. Driving ENABLE low breaks the connection
between SDAIN and SDAOUT, SCLIN and SCLOUT. READY
is an open drain output that indicates when the backplane
and card sides are connected together.
, 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 6356140, 6650174, 7032051.
TYPICAL APPLICATIO
5V 3.3V
10k 10k
BACK_SCL
BACK_SDA
3.3V
SCLIN
VCC
LTC4304
0.01µF
SCLOUT
10k 10k
CARD_SCL
SDAIN
SDAOUT
FAULT
ENABLE
GND
100k
READY
ACC
4304 TA01
CARD_SDA
SDAOUT
5V/DIV
SDAIN
5V/DIV
SCLOUT
5V/DIV
FAULT
5V/DIV
BACKPLANE STAGGERED
CONNECTOR CONNECTOR
CARD
Stuck Bus Resolved with
Automatic Clocking
STUCK LOW > 30ms
RECOVERS
DISCONNECT AT TIMEOUT
AUTOMATIC CLOCKING
200ms/DIV
4304 TA01b
4304fa
1


Linear Technology Electronic Components Datasheet

LTC4304CMS Datasheet

Hot Swappable 2-Wire Bus Buffer

No Preview Available !

LTC4304
ABSOLUTE AXI U RATI GS (Notes 1, 2)
VCC to GND .................................................. – 0.3V to 7V
SDAIN, SCLIN, SDAOUT, SCLOUT, READY, ENABLE,
FAULT, ACC .................................................. –0.3V to 7V
Operating Temperature
LTC4304C ................................................ 0°C to 70°C
LTC4304I .............................................– 40°C to 85°C
SDAIN, SCLIN, SDAOUT, SCLOUT,
FAULT READY (Note 3) .........................................30mA
Storage Temperature Range
MSOP ................................................– 65°C to 150°C
DFN....................................................–65°C to 125°C
Lead Temperature (Soldering, 10sec)
MSOP ............................................................... 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
ENABLE 1
SCLOUT 2
SCLIN 3
ACC 4
GND 5
10 VCC
9 SDAOUT
11
8 SDAIN
7 FAULT
6 READY
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
TJMAX = 125°C, θJA = 43°C/W
EXPOSED PAD (PIN 11)
PCB GND CONNECTION OPTIONAL
TOP VIEW
ENABLE 1
SCLOUT 2
SCLIN 3
ACC 4
GND 5
10 VCC
9 SDAOUT
8 SDAIN
7 FAULT
6 READY
MS10 PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 125°C, θJA =200°C/W
ORDER PART NUMBER DD PART MARKING* ORDER PART NUMBER MS PART MARKING*
LTC4304CDD
LTC4304IDD
LBBD
LBBD
LTC4304CMS
LTC4304IMS
LTBBC
LTBBC
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. *The temperature grade is identified by a label on the shipping container.
ELECTRICAL CHARACTERISTICS The denotes the 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 UNITS
Power Supply
VCC
ICC
Startup Circuitry
VPRE
TIDLE
VOL_READY
Positive Supply Voltage
Supply Current
Supply Current, ENABLE = GND
Precharge Voltage
Bus Idle Time
READY Output Low Voltage
2.7
5.5
V
VCC = 5.5V, VSDAIN = VSDAOUT = 0V (Note 7)
VCC = 5.5V
6
8
mA
1.5
mA
SDA, SCL Floating, VCC = 5.5V
IPULLUP = 3mA
IPULLUP = 6mA, VCC = 4.7V
0.8
1
1.2
V
60
95
175
µs
0.4
V
0.4
V
VTHR_ENABLE
IENABLE
VTHR
ENABLE Threshold
ENABLE Input Current
ENABLE from 0 to VCC
SDA, SCL Logic Input Threshold Voltage Rising Edge
0.8
1.6
1.4
2
V
0.1
±1.5
µA
1.8
2
V
4304fa
2


Part Number LTC4304CMS
Description Hot Swappable 2-Wire Bus Buffer
Maker Linear
PDF Download

LTC4304CMS Datasheet PDF






Similar Datasheet

1 LTC4304CMS Hot Swappable 2-Wire Bus Buffer
Linear





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy