TCA4311

不推荐用于新设计

2 位双向 2.7V 至 5.5V 热插拔 400kHz I2C/SMBus 缓冲器

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数据表

document-pdfAcrobat TCA4311 Hot Swappable 2-Wire Bus Buffers 数据表 (Rev. A) (英语)

TCA4311

不推荐用于新设计

数据表

立即订购

产品详情

Frequency (max) (MHz)

0.4

Rating

Catalog

Operating temperature range (°C)

-40 to 85

Frequency (max) (MHz)

0.4

Rating

Catalog

Operating temperature range (°C)

-40 to 85

SOIC (D)

8

29.4 mm² 4.9 x 6

VSSOP (DGK)

8

14.7 mm² 3 x 4.9

Operating Power-Supply Voltage Range of 2.7-V to 5.5-V
Supports Bidirectional Data Transfer of I²C Bus Signals
SDA and SCL Lines Are Buffered Which Increases Fanout
1-V Precharge on All SDA and SCL Lines Prevents Corruption During Live Board Insertion and Removal From Backplane
SDA and SCL Input Lines Are Isolated From Outputs
Accommodates Standard Mode and Fast Mode I²C Devices
Applications Include Hot Board Insertion and Bus Extension
Low I_CC Chip Disable of <1 μA
READY Open-Drain Output
Supports Clock Stretching, Arbitration, and Synchronization
Powered-Off High-Impedance I²C Pins
Open-Drain I²C Pins
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 8000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

All trademarks are the property of their respective owners.

Operating Power-Supply Voltage Range of 2.7-V to 5.5-V
Supports Bidirectional Data Transfer of I²C Bus Signals
SDA and SCL Lines Are Buffered Which Increases Fanout
1-V Precharge on All SDA and SCL Lines Prevents Corruption During Live Board Insertion and Removal From Backplane
SDA and SCL Input Lines Are Isolated From Outputs
Accommodates Standard Mode and Fast Mode I²C Devices
Applications Include Hot Board Insertion and Bus Extension
Low I_CC Chip Disable of <1 μA
READY Open-Drain Output
Supports Clock Stretching, Arbitration, and Synchronization
Powered-Off High-Impedance I²C Pins
Open-Drain I²C Pins
Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II
ESD Protection Exceeds JESD 22
- 8000-V Human-Body Model (A114-A)
- 200-V Machine Model (A115-A)
- 1000-V Charged-Device Model (C101)

All trademarks are the property of their respective owners.

The TCA4311 is a hot swappable I²C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.

When the I²C bus is idle, the TCA4311 can be put into shutdown mode by setting the EN pin low. When EN is high, the TCA4311 resumes normal operation. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. When READY is high, the SDAIN and SCLIN are connected to SDAOUT and SCLOUT. When the two sides are disconnected, READY is low.

Both the backplane and card may be powered with supply voltages ranging from 2.7 V to 5.5 V, with no restrictions on which supply voltage is higher.

The TCA4311 has standard open-drain I/Os. The size of the pullup resistors to the I/Os depends on the system, but each side of this buffer must have a pullup resistor. The device is designed to work with Standard Mode and Fast Mode I²C devices in addition to SMBus devices. Standard Mode I²C devices only specify 3 mA in a generic I²C system where Standard Mode devices and multiple masters are possible. Under certain conditions, high termination currents can be used.

The TCA4311 is a hot swappable I²C bus buffer that supports I/O card insertion into a live backplane without corruption of the data and clock busses. Control circuitry prevents the backplane from being connected to the card until a stop command or bus idle occurs on the backplane without bus contention on the card. When the connection is made, this device provides bidirectional buffering, keeping the backplane and card capacitances isolated. During insertion, the SDA and SCL lines are precharged to 1 V to minimize the current required to charge the parasitic capacitance of the chip.

When the I²C bus is idle, the TCA4311 can be put into shutdown mode by setting the EN pin low. When EN is high, the TCA4311 resumes normal operation. It also includes an open drain READY output pin, which indicates that the backplane and card sides are connected together. When READY is high, the SDAIN and SCLIN are connected to SDAOUT and SCLOUT. When the two sides are disconnected, READY is low.

Both the backplane and card may be powered with supply voltages ranging from 2.7 V to 5.5 V, with no restrictions on which supply voltage is higher.

The TCA4311 has standard open-drain I/Os. The size of the pullup resistors to the I/Os depends on the system, but each side of this buffer must have a pullup resistor. The device is designed to work with Standard Mode and Fast Mode I²C devices in addition to SMBus devices. Standard Mode I²C devices only specify 3 mA in a generic I²C system where Standard Mode devices and multiple masters are possible. Under certain conditions, high termination currents can be used.

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	类型	标题		下载最新的英语版本		日期
*	数据表	TCA4311 Hot Swappable 2-Wire Bus Buffers 数据表 (Rev. A)				2014年 6月 12日

TCA4311

2 位双向 2.7V 至 5.5V 热插拔 400kHz I2C/SMBus 缓冲器

TCA4311

产品详情

技术文档

订购和质量