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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?） 打赏 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  
SCLOUTislowfor≥30ms(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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