TCA6424ARGJR.B

TCA6424A Low-Voltage 24-Bit I2C and SMBus I/O Expander With Interrupt Output, Reset, and Configuration Registers

Manufacturer

Texas Instruments

Overview

Part: TCA6424A from Texas Instruments

Type: Low-Voltage 24-Bit I2C and SMBus I/O Expander

Key Specs:

Operating power-supply voltage range: 1.65 V to 5.5 V
Standby current consumption: 1 μA
I2C Bus speed: 400-kHz
Number of I/O bits: 24-Bit

Features:

Allows bidirectional voltage-level translation
I2C to Parallel port expander
Schmitt-Trigger action on SCL and SDA inputs
5-V Tolerant I/O ports
Active-low reset input (RESET)
Open-drain active-low interrupt output (INT)
Input/output configuration register
Polarity inversion register
Internal power-on reset
Power up with all channels configured as inputs
No glitch on power up
Noise filter on SCL/SDA inputs
Latched outputs with high-current drive capability for directly driving LEDs
Latch-up performance exceeds 100 mA per JESD 78, class II
ESD protection exceeds JESD 22 (2000-V Human-body model, 200-V Machine model, 1000-V Charged-device model)
One hardware pin (ADDR) to program I2C address for up to two devices

Applications:

General-purpose remote I/O expansion for microcontrollers
Interfacing with next-generation microprocessors and microcontrollers
Driving LEDs

Package:

UQFN (32): 5.00 mm × 5.00 mm

Features

Operating power-supply voltage range of 1.65 V to 5.5 V
Allows bidirectional voltage-level translation and GPIO expansion between:
- 1.8-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 2.5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 3.3-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
- 5-V SCL/SDA and 1.8-V, 2.5-V, 3.3-V, or 5-V P Port
I ²C to Parallel port expander
Low standby current consumption of 1 μA
Schmitt-Trigger action allows slow input transition and better switching noise immunity at the SCL and SDA inputs
- Vhys = 0.18 V Typ at 1.8 V
- Vhys = 0.25 V Typ at 2.5 V
- Vhys = 0.33 V Typ at 3.3 V
- Vhys = 0.5 V Typ at 5 V
5-V Tolerant I/O ports
Active-low reset input ( RESET)
Open-drain active-low interrupt output ( INT)
400-kHz Fast I2C Bus
Input/output configuration register
Polarity inversion register
Internal power-on reset
Power up with all channels configured as inputs
No glitch on power up
Noise filter on SCL/SDA inputs
Latched outputs with high-current drive maximum capability for directly driving LEDs
Latch-up performance exceeds 100 mA per JESD 78, class II
ESD protection exceeds JESD 22
- 2000-V Human-body model (A114-A)
- 200-V Machine model (A115-A)
- 1000-V Charged-device model (C101)

Pin Configuration

If used, the exposed center pad must be connected as a secondary ground or left electrically open.

Electrical Characteristics

over recommended operating free-air temperature range, VCCI = 1.65 V to 5.5 V (unless otherwise noted)

	PARAMETER	TEST CONDITIONS	VCCP	MIN	TYP(1)	MAX	UNIT
VIK	Input diode clamp voltage	II = –18 mA	1.65 V to 5.5 V	–1.2			V
VPOR	Power-on reset voltage VI	= VCCP or GND, IO = 0	1.65 V to 5.5 V		1	1.4	V
			1.65 V	1.2
			2.3 V	1.8
		IOH = –8 mA	3 V	2.6
	P-port high-level output		4.5 V	4.1
VOH	voltage		1.65 V	1			V
			2.3 V	1.7
		IOH = –10 mA	3 V	2.5
			4.5 V	4.0
			1.65 V			0.45
			2.3 V			0.25
		P-port low-level output	IOL = 8mA	3 V			0.25
				4.5 V			0.23
VOL	voltage		1.65 V			0.6	V
			2.3 V			0.3
		IOL = 10 mA	3 V			0.25
			4.5 V			0.24
	SDA	VOL = 0.4 V	1.65 V to 5.5 V	3
IOL	INT	VOL = 0.4 V	1.65 V to 5.5 V	3	15		mA
	SCL, SDA, RESET	VI = VCCI or GND				±0.1
	ADDR	VI = VCCP or GND	1.65 V to 5.5 V			±0.1	μA
IIH	P port	VI = VCCP				1	μA
IIL	P port	VI = GND	1.65 V to 5.5 V			1	μA

Absolute Maximum Ratings

over operating free-air temperature range (unless otherwise noted)

				MIN	MAX	UNIT
VCCI	Supply voltage range			–0.5	6.5	V
VCCP	Supply voltage range	–0.5	6.5	V
VI	Input voltage range(2)				6.5	V
VO	Output voltage range(2)			–0.5	6.5	V
IIK	Input clamp current	ADDR, RESET, SCL	VI < 0		±20	mA
IOK	Output clamp current	INT	VO < 0		±20	mA
	Input/output clamp current	P port	VO < 0 or VO > VCCP		±20
IIOK		SDA	VO < 0 or VO > VCCI		±20	mA
		P port	VO = 0 to VCCP		25	mA
IOL	Continuous output low current	SDA, INT	VO = 0 to VCCI		15
IOH	Continuous output high current	P port	VO = 0 to VCCP		25	mA
	Continuous current through GND				200
ICC	Continuous current through VCCP				160	mA
	Continuous current through VCCI				10
Tstg	Storage temperature range			–65	150	°C

⁽¹⁾ Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

Recommended Operating Conditions

			MIN	MAX	UNIT
VCCI	Supply voltage		1.65	5.5	V
VCCP	Supply voltage		1.65	5.5	V
		SCL, SDA	0.7 × VCCI	VCCI
VIH	High-level input voltage	RESET	0.7 × VCCI	5.5	V
		ADDR, P27–P00	0.7 × VCCP	5.5
		SCL, SDA, RESET	–0.5	0.3 × VCCI
VIL	Low-level input voltage	ADDR, P27–P00	–0.5	0.3 × VCCP	V
IOH	High-level output current	P27–P00		10	mA
IOL	Low-level output current	P27–P00		25	mA
TA	Operating free-air temperature		–40	85	°C

Product Folder Links: TCA6424A

⁽²⁾ The input negative-voltage and output voltage ratings may be exceeded if the input and output current ratings are observed.

⁽²⁾ JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. Pins listed as 2000 V may actually have higher performance.

Thermal Information

		TCA6424A
	THERMAL METRIC(1)	RGJ (UQFN)
		32 PINS
RθJA	Junction-to-ambient thermal resistance	44.9
RθJC(top)	Junction-to-case (top) thermal resistance	14.3
RθJB	Junction-to-board thermal resistance	17.7
ψJT	Junction-to-top characterization parameter	0.3
ψJB	Junction-to-board characterization parameter	17.7
RθJC(bottom)	Junction-to-case (bottom) thermal resistance	9.1

⁽¹⁾ For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report.

Related Variants

The following components are covered by the same datasheet.

Part Number	Manufacturer	Package
TCA6424A	Texas Instruments	—
TCA6424ARGJR	Texas Instruments	VQFN-32-EP(5x5)
TCA6424ARGJR.A	Texas Instruments	—

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