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IIC驱动芯片 LTC43031MS8 手册

更新时间:2020-01-03 10:50:23 大小:550K 上传用户:jxlgxtutianya查看TA发布的资源 标签:ltc43031ms8IIC驱动芯片 下载积分:2分 评价赚积分 (如何评价?) 收藏 评论(0) 举报

资料介绍

ltc43031ms8,IIC驱动芯片,用于隔离内部MCU的IIC模块与外部的IIC模块进行通讯

部分文件列表

文件名 大小
C117202_LTC4303IMS8%23PBF_2017-07-12.PDF 550K

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LTC4303  
Hot Swappable 2-Wire  
Bus Buffer with Stuck  
Bus Recovery  
U
FEATURES  
DESCRIPTIO  
The LTC®4303 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 LTC4303 provides bidirectional buffering, keeping the  
backplane and card capacitances isolated. If SDAOUT or  
SCLOUTislowfor30ms(typ),theLTC4303automatically  
breaks the data and clock bus connection. At this time the  
LTC4303automaticallygeneratesupto16clockpulseson  
SCLOUT in an attempt to free the bus. A connection will  
be enabled automatically when the bus becomes free.  
Automatic Disconnect of SDA/SCL Lines when Bus  
is Stuck Low for ≥ 30ms  
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  
Pin Compatible with LTC4300A-1  
1ꢀkꢁ ꢂuman Bodꢃ ꢄodel ꢅSD Protection  
Isolates Input SDA and SCL Lines from Output  
2
2
Compatible with I CTM, I C Fast-Mode and SMBus  
Standards (Up to 400kHz Operation)  
READY Open Drain Output  
Rise-timeacceleratorcircuitryallowstheuseoflargerpull-  
up resistance while still meeting rise-time requirements.  
During insertion, the SDA and SCL lines are precharged  
to 1V to minimize bus disturbances. When driven high,  
ENABLE allows the LTC4303 to connect after a stop bit or  
busidleoccurs.DrivingENABLElowbreakstheconnection  
betweenSDAINandSDAOUT,SCLINandSCLOUT.READY  
is an open drain output that indicates when the backplane  
and card sides are connected together.  
1V Precharge on All SDA and SCL Lines  
High Impedance SDA, SCL Pins for V = 0V  
CC  
ENABLE Gates Connection from Input to Output  
MSOP 8-Pin andUDFN (3mm × 3mm) Packages  
APPLICATIO S  
Hot Board Insertion  
, 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.  
Servers  
Capacitance Buffer/Bus Extender  
RAID Systems  
U
TYPICAL APPLICATIO  
Stuck Bus Resolved  
with Automatic Clocking  
5V 3.3V  
0.01  
F
10k 10k  
V
CC  
10k 10k  
LTC4303  
SDAOUT  
5V/DIV  
SCLIN  
SCLOUT  
BACK_SCL  
CARD_SCL  
CARD_SDA  
SDAIN  
5V/DIV  
SDAIN  
SDAOUT  
READY  
BACK_SDA  
3.3V  
SCLOUT  
5V/DIV  
ENABLE  
GND  
100k  
4303 TA01  
4303 TA01b  
200 s/DIV  
BACKPLANE  
CONNECTOR CONNECTOR  
CARD  
STAGGERED  
4303fb  
1
LTC4303  
W W U W  
(Notes 1, 2)  
ABSOLUTE AXI U RATI GS  
SDAIN, SCLIN, SDAOUT, SCLOUT, READY  
(Note 3)..................................................................30mA  
Storage Temperature Range  
V
to GND ..................................................0.3V to 7V  
CC  
SDAIN, SCLIN, SDAOUT, SCLOUT,  
READY, ENABLE...........................................0.3V to 7V  
Operating Temperature  
MSOP ................................................65°C to 150°C  
DFN....................................................65°C to 125°C  
Lead Temperature (Soldering, 10sec)  
LTC4303C ................................................ 0°C to 70°C  
LTC4303I .............................................40°C to 85°C  
MSOP ............................................................... 300°C  
U
W
U
PACKAGE/ORDER I FOR ATIO  
TOP VIEW  
ENABLE  
SCLOUT  
SCLIN  
GND  
1
2
3
4
8
7
6
5
V
CC  
TOP VIEW  
SDAOUT  
SDAIN  
9
ENABLE  
SCLOUT  
SCLIN  
GND  
1
2
3
4
8 V  
CC  
7 SDAOUT  
6 SDAIN  
5 READY  
READY  
MS8 PACKAGE  
8-LEAD PLASTIC MSOP  
= 125°C, θ = 200°C/W  
DD PACKAGE  
8-LEAD (3mm × 3mm) PLASTIC DFN  
T
JMAX  
JA  
T
JMAX  
= 125°C, θ = 43°C/W  
JA  
EXPOSED PAD (PIN 9)  
PCB CONNECTION OPTIONAL  
ORDER PART NUMBER  
DD PART MARKING*  
LBPZ  
ORDER PART NUMBER  
MS8 PART MARKING*  
LTBPY  
LTC4303CDD  
LTC4303IDD  
LTC4303CMS8  
LTC4303IMS8  
Order Options Tape and Reel: Add #TR Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF  
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 applꢃ over the full operating  
temperature range, otherwise specifications are at T = 2ꢀ°C. ꢁ = 2.7ꢁ to ꢀ.ꢀ, unless otherwise noted.  
A
CC  
SYꢄBOL  
PARAꢄꢅTꢅR  
CONDITIONS  
ꢄIN  
TYP  
ꢄAX  
UNITS  
Power Supplꢃ  
V
Positive Supply Voltage  
2.7  
5.5  
8
V
CC  
I
CC  
Supply Current  
Supply Current, ENABLE = GND  
V
V
= 5.5V, V  
= 5.5V  
= V = 0V (Note 7)  
SDAOUT  
6
1.5  
mA  
mA  
CC  
CC  
SDAIN  
Startup Circuitrꢃ  
V
Precharge Voltage  
Bus Idle Time  
SDA, SCL Floating, V = 5.5V  
0.8  
60  
1
1.2  
V
PRE  
CC  
T
IDLE  
95  
175  
µs  
V
READY Output Low Voltage  
I
I
= 3mA  
= 6mA, V = 4.7V  
0.4  
0.4  
V
V
OL_READY  
PULLUP  
PULLUP  
CC  
V
ENABLE Threshold  
0.8  
1.6  
1.4  
0.1  
1.8  
2
V
µA  
V
THR_ENABLE  
ENABLE  
I
ENABLE Input Current  
ENABLE from 0 to V  
1.5  
2
CC  
V
THR  
SDA, SCL Logic Input Threshold Voltage Rising Edge  
4303fb  
2

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