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TCA9803DGKT

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

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TCA9803DGKT
Datasheet:

TCA9803DGKT Datasheet (PDF)
Translator Type:

Voltage Level
Channel Type:

Bidirectional
Number of Circuits:

1
Channels per Circuit:

2
EDA/CAD Models:

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TCA9803DGKT General Description

The TCA9803 is a dual-channel bidirectional buffer intended for I²C bus and SMBus/PMBus systems. It provides bidirectional level shifting (up-translation and down-translation) between low voltages (down to 0.8 V) and higher voltages (1.65 V to 3.6 V). The TCA9803 features an internal current source on the B-side of the device, allowing the removal of external pull-up resistors on the B-side. The current source also provides an improved rise time and ultra-low power consumption.

The TCA9803 is able to provide true buffering (rather than a pass-FET solution) without using a static voltage offset or incremental offset. This means that the V_OL 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 V_IL thresholds. Another key feature of the TCA9803 is that there are no power sequencing requirements, or power supply dependencies. V_CCAcan be greater than, less than, or equal to V_CCB. This gives the system designer flexibility with how the TCA9803 is used.

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

Key Features

Two-channel bidirectional buffer
Integrated current source on B-side, requires no external B-side resistors
Ultra-low power consumption
No static-voltage offset, low V_OL
I²C bus and SMBus compatible
Operating supply voltage range of 0.8 V to 3.6 V on A-side
Operating supply voltage range of 1.65 V to 3.6 V on B-side
Active-high repeater enable input
Powered-off high impedance I²C bus pins on A-side
Powered-off back-power protection I²C bus pins
Support for clock stretching and multiple master arbitration
Family of current source options from 0.5 mA to 3 mA

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
Frequency (max) (MHz)	0.4	VCCA (min) (V)	0.8
VCCA (max) (V)	3.6	VCCB (min) (V)	1.65
VCCB (max) (V)	3.6	Supply restrictions	No rule
Rating	Catalog	Operating temperature range (°C)	-40 to 125
feature-type	Buffer/Repeater	feature-process-technology
feature-input-signal-type	I2C	feature-typical-input-capacitance-pf
feature-minimum-operating-supply-voltage-v	0.8\|1.65	feature-maximum-operating-supply-voltage-v	3.6
feature-maximum-supply-current-ma	0.045(Typ)	feature-packaging	Tape and Reel
feature-rad-hard		feature-pin-count	8
feature-cecc-qualified	No	feature-esd-protection	Yes
feature-military	No	feature-aec-qualified	No
feature-aec-qualified-number		feature-auto-motive	No
feature-p-pap	No	feature-eccn-code	EAR99
feature-svhc	No	feature-svhc-exceeds-threshold	No

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Ratings and Reviews

T**r 04/12/2023

Good. you can take. Thank you to the seller.

C**b 06/22/2022

Packed in antistatic, until i checked, i'm waiting for a button. in 96 region for 1 week, quickly got.

E**a 03/29/2021

Did not check waiting for the batteries to look done well

A**n 07/22/2020

The order went to m/o for two weeks. with the appearance of everything as in the description, it came packed in a package-pupyrku. thanks to the seller.