LTC4306 采用电容缓冲的 4 通道、二线式总线多路复用器

The LTC®4306 is a 4-channel, 2-wire bus multiplexer with bus buffers to provide capacitive isolation between the upstream bus and downstream buses. Through software control, the LTC4306 connects the upstream 2-wire bus to any desired combination of downstream buses. Each channel can be pulled up to a supply voltage ranging from 2.2V to 5.5V, independent of the LTC4306 supply voltage.

The downstream channels are also provided with ALERT1-ALERT4 inputs for fault reporting. Programmable timeout circuitry disconnects the downstream buses if the bus is stuck low. When activated, rise time accelerators source currents into the 2-wire bus pins to reduce rise time. Driving the ENABLE pin low restores all features to their default states. Three address pins provide 27 distinct addresses.

The LTC4306 is available in 24-lead QFN (4mm × 5mm) and SSOP packages

产品特点 Features

1:4 2-Wire Multiplexer/Switch
Connect SDA and SCL Lines with 2-Wire Bus Commands
Supply Independent Bidirectional Buffer for SDA and SCL Lines Increases Fan-Out
Programmable Disconnect from Stuck Bus
Compatible with I2C and SMBus Standards
Rise Time Accelerator Circuitry
SMBus Compatible ALERT Response Protocol
Two General Purpose Inputs-Outputs
Prevents SDA and SCL Corruption During Live Board
Insertion and Removal from Backplane
±10kV Human Body Model ESD Ruggedness
24-Lead QFN (4mm × 5mm) and SSOP Packages

应用

Nested Addressing
5V/3.3V Level Translator
Capacitance Buffer/Bus Extender

典型应用图

参数

LTC4306 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) *
LTC4306CGN	SSOP	16	C	$5.00	$3.50
LTC4306CGN#PBF	SSOP	16	C	$5.00	$3.50
LTC4306CGN#TR	SSOP	16	C		$3.56
LTC4306CGN#TRPBF	SSOP	16	C		$3.56
LTC4306CUFD	QFN	24	C	$5.07	$3.55
LTC4306CUFD#PBF	QFN	24	C	$5.07	$3.55
LTC4306CUFD#TR	QFN	24	C		$3.61
LTC4306CUFD#TRPBF	QFN	24	C		$3.61
LTC4306IGN	SSOP	16	I	$6.00	$4.20
LTC4306IGN#PBF	SSOP	16	I	$6.00	$4.20
LTC4306IGN#TR	SSOP	16	I		$4.26
LTC4306IGN#TRPBF	SSOP	16	I		$4.26
LTC4306IUFD	QFN	24	I	$6.07	$4.25
LTC4306IUFD#PBF	QFN	24	I	$6.07	$4.25
LTC4306IUFD#TR	QFN	24	I		$4.31
LTC4306IUFD#TRPBF	QFN	24	I		$4.31

LTC4306 数据手册及相关资料下载

数据手册 (英文) : LTC4306 - 4-Channel, 2-Wire Multiplexer with Capacitance Buffering.PDF
可靠性数据 : R410 Reliability Data .PDF
产品选型卡 : I2C Muxes, Buffers & Accelerators.PDF
产品选型卡 : I2C Quick Guide.PDF