LTC4307 Low Offset Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery

The LTC4307 hot swappable, 2-wire bus buffer allows I/O card insertion into a live backplane without corruption of the data and clock busses. The LTC4307 provides bidirectional buffering, keeping the backplane and card capacitances isolated. Low offset and high VOL tolerance allows multiple devices to be cascaded on the clock and data busses. If SDAOUT or SCLOUT are low for 30ms, the LTC4307 will automatically break the bus connection. At this time the LTC4307 automatically generates up to 16 clock pulses on SCLOUT in an attempt to free the bus. A connection will resume if the stuck bus is cleared.

During insertion, the SDA and SCL lines are pre-charged to 1V to minimize bus disturbances. When driven high, the ENABLE input allows the LTC4307 to connect after a stop bit or bus idle. Driving ENABLE low breaks the connection between SDAIN and SDAOUT, SCLIN and SCLOUT. READY is an open-drain output which indicates that the backplane and card sides are connected

产品特点 Features

Bidirectional Buffer with Stuck Bus Recovery
60mV Buffer Offset Independent of Load
30ms Stuck Bus Timeout
Compatible with Non-Compliant VOL I2C Devices
Prevents SDA and SCL Corruption During Live Board Insertion and Removal from Backplane
±5kV Human Body Model ESD Protection
Isolates Input SDA and SCL Line from Output
Compatible with I2CTM, I2C Fast Mode and SMBus
READY Open-Drain Output
1V Precharge on All SDA and SCL Lines
High Impedance SDA, SCL Pins for VCC = 0V
Small 8-Lead (3mm × 3mm) DFN and 8-Lead MSOP Packages

应用

Live Board Insertion
Servers
Capacitance Buffer/Bus Extender
RAID Systems
ATCA

典型应用图

参数

LTC4307 订购信息和价格参考Package Variations and Pricing

器件型号	封装	引脚	温度	价格 (以 1 ~ 99 片为批量)	价格 (以 1000 片为批量) *
LTC4307CDD#PBF	DFN	8	C	$3.07	$2.15
LTC4307CDD#TRPBF	DFN	8	C		$2.21
LTC4307CDD-1#PBF	DFN	8	C	$3.07	$2.15
LTC4307CDD-1#TRPBF	DFN	8	C		$2.21
LTC4307CMS8#PBF	MSOP	8	C	$3.07	$2.15
LTC4307CMS8#TRPBF	MSOP	8	C		$2.21
LTC4307CMS8-1#PBF	MSOP	8	C	$3.07	$2.15
LTC4307CMS8-1#TRPBF	MSOP	8	C		$2.21
LTC4307IDD#PBF	DFN	8	I	$3.68	$2.58
LTC4307IDD#TRPBF	DFN	8	I		$2.64
LTC4307IDD-1#PBF	DFN	8	I	$3.68	$2.58
LTC4307IDD-1#TRPBF	DFN	8	I		$2.64
LTC4307IMS8#PBF	MSOP	8	I	$3.68	$2.58
LTC4307IMS8#TRPBF	MSOP	8	I		$2.64
LTC4307IMS8-1#PBF	MSOP	8	I	$3.68	$2.58
LTC4307IMS8-1#TRPBF	MSOP	8	I		$2.64

LTC4307 数据手册及相关资料下载

数据手册 (英文) : LTC4307 - Low Offset Hot Swappable 2-Wire Bus Buffer with Stuck Bus Recovery.PDF
可靠性数据 : R527 Reliability Data .PDF
产品选型卡 : I2C Muxes, Buffers & Accelerators.PDF
产品选型卡 : I2C Quick Guide.PDF