TCA9509RVHR - TI

The pictures are for reference only, and the specific specifications can be found in the product manual.

Part No

TCA9509RVHR
Manufacturer

TI
ChipWorker Part#

CW11530865
Category

Interface IC, Interface Controller
Package

XFQFN-8
Description

TEXAS INSTRUMENTS TCA9509RVHR IC, I2C SMB BUS REPEATER, 400kHz, 5.5V, X2QFN-8
Documentation

Datasheet

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TCA9509RVHR Specifications

Attribute	Attribute Value

Part Number	TCA9509RVHR
Manufacturer	TI
ChipWorker Part#	CW11530865
Category	Interface IC, Interface Controller
Documentation	Datasheet
Mounting Style	Surface Mount
Number of Pins	8 Pin
Case/Package	XFQFN-8
Supply Voltage (DC)	2.70V ~ 5.50V
Number of Outputs	2 Output
Output Current	6.00 mA
Supply Current	3 mA
Number of Channels	1 Channel
Number of Positions	8 Position
Power Dissipation	100 mW
Input Capacitance	6.5 pF
Input Capacitance (Ciss)	7 pF
Operating Temperature (Max)	85 ℃
Operating Temperature (Min)	-40 ℃
Power Dissipation (Max)	100 mW
Supply Voltage	2.7V ~ 5.5V
Supply Voltage (Max)	5.5 V
Supply Voltage (Min)	2.7 V
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Operating Temperature	-40℃ ~ 85℃
Product Lifecycle Status	Active
Packaging	Cut Tape (CT)
RoHS	RoHS Compliant
Lead-Free Status	Lead Free
REACH SVHC Compliance	No SVHC
REACH SVHC Compliance Edition	2015/06/15
ECCN Code	EAR99

Product Description

This TCA9509 integrated circuit is an I2C bus/SMBus Repeater for use in I2C/SMBus systems. It can also provide bidirectional voltage-level translation (up-translation/down-translation) between low voltages (down to 0.9 V) and higher voltages (2.7 V to 5.5 V) in mixed-mode applications. This device enables I2C and similar bus systems to be extended, without degradation of performance even during level shifting.
The TCA9509 buffers both the serial data (SDA) and the serial clock (SCL) signals on the I2C bus, thus allowing 400-pF bus capacitance on the B-side. This device can also be used to isolate two halves of a bus for voltage and capacitance.
The TCA9509 has two types of drivers A-side drivers and B-side drivers. All inputs and B-side I/Os are overvoltage tolerant to 5.5V. The A-side I/Os are overvoltage tolerant to 5.5V when the device is unpowered (VCCB and/or VCCA=0V).
The bus port B drivers are compliant with SMBus I/O levels, while the A side uses a current sensing mechanism to detect the input or output LOW signal which prevents bus lock-up. The A side uses a 1 mA current source for pull-up and a 200 Ω pull-down driver. This results in a LOW on the A side accommodating smaller voltage swings. The output pull-down on the A side internal buffer LOW is set for approximately 0.2 V, while the input threshold of the internal buffer is set about 50 mV lower than that of the output voltage LOW. When the A side I/O is driven LOW internally, the LOW is not recognized as a LOW by the input. This prevents a lock-up condition from occurring. The output pull-down on the B side drives a hard LOW and the input level is set at 0.3 of SMBus or I2C-bus voltage level which enables B side to connect to any other I2C-bus devices or buffer.
The TCA9509 drivers are not enabled unless VCCA is above 0.8 V and VCCB is above 2.5 V. The enable (EN) pin can also be used to turn the drivers on and off under system control. Caution should be observed to only change the state of the EN pin when the bus is idle.

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