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TCA9803DGKR

2-bit level-translating 400-kHz I2C/SMBus buffer/repeater with internal 3-mA current source

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TCA9803DGKR
Datasheet:

TCA9803DGKR Datasheet (PDF)
Translator Type:

Voltage Level
Channel Type:

Bidirectional
Number of Circuits:

1
Channels per Circuit:

2
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TCA9803DGKR General Description

The TCA9803 is a dual-channel bidirectional bufferintended for I2C bus and SMBus/PMBus systems. It provides bidirectionallevel shifting (up-translation and down-translation) between low voltages (down to 0.8 V) andhigher voltages (1.65 V to 3.6 V). The TCA9803 features aninternal current source on the B-side of the device, allowing the removal of external pull-upresistors on the B-side. The current source also provides an improved rise time and ultra-low powerconsumption.

The TCA9803 is able to provide true buffering (ratherthan a pass-FET solution) without using a static voltage offset or incremental offset. This meansthat the VOL on both the A and B sides of the TCA9803 are very low (approximately 0.2 V),helping to eliminate communication issues as a result of fixed VILthresholds. Another key feature of the TCA9803 is thatthere are no power sequencing requirements, or power supply dependencies. VCCAcan be greater than, less than, or equal to VCCB. This gives thesystem designer flexibility with how the TCA9803 isused.

The TCA9803 is part of a four device family withvarying current source strengths (see the Device Comparison Table).

Key Features

Two-Channel Bidirectional Buffer
Integrated Current Source onB-side, Requires No External B-Side Resistors
Ultra-Low PowerConsumption
No Static-Voltage Offset, LowVOL
I2C Bus and SMBusCompatible
Operating Supply Voltage Range of 0.8 V to 3.6 V onA-side
Operating Supply Voltage Range of 1.65 V to 3.6 V onB-side
Active-High Repeater Enable Input
Powered-Off HighImpedance I2C Bus Pins on A-Side
Powered-Off Back-Power Protection I2C BusPins
Support for Clock Stretching and Multiple MasterArbitration
Family of Current Source Options from 0.5 mA to3 mA

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Application

Mixed-Voltage Systems:
- Used in systems where different components or subsystems operate at distinct voltage levels, facilitating communication between them.
Sensor Networks:
- Applied in sensor networks or systems where sensors with different voltage requirements are connected through the I2C bus.
Battery-Powered Devices:
- Integrated into battery-powered devices, such as portable electronics, to manage I2C communication between components with varying voltage needs.
Industrial Automation:
- Utilized in industrial automation systems where devices with different voltage levels need to communicate on the I2C bus.
Embedded Systems:
- Deployed in embedded systems where space is limited, and there is a need for voltage level translation in I2C communication.

Specifications

Category	Integrated Circuits (ICs)LogicTranslators, Level Shifters	Series	-
Translator Type	Voltage Level	Channel Type	Bidirectional
Number of Circuits	1	Channels per Circuit	2
Voltage - VCCA	0.8 V ~ 3.6 V	Voltage - VCCB	1.65 V ~ 3.6 V
Input Signal	-	Output Signal	-
Output Type	Non-Inverted	Data Rate	-
Operating Temperature	-40°C ~ 125°C (TA)	Features	-
Mounting Type	Surface Mount	Base Product Number	TCA9803

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Ratings and Reviews

Y**n 07/03/2022

Thank you the product corresponds to the description, i recommend the seller.

I**h 01/25/2022

The product itself is nice but there is an error in the PCB designe. Jumpers that set steps on the motor driver can only by connected to GND and it should be to VCC so in order to change stepper values you have to shortwire. Solution and details about the issue can be found on google.

S**y 04/03/2021

Very professional, with good reputation.\n\nVery recommendable!

A**n 10/19/2020

The order came late but everything is in order.