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TCA6424

更新时间： 2024-09-26 03:28:43

品牌	Logo	应用领域
德州仪器 - TI		输出元件
页数	文件大小	规格书
29页	729K
描述
LOW-VOLTAGE 24-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

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TCA6424 数据手册

TCA6424

LOW-VOLTAGE 24-BIT I²C AND SMBus I/O EXPANDER

WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

www.ti.com

SCPS175–NOVEMBER 2007

FEATURES

•

Operating Power-Supply Voltage Range of

1.65 V to 5.5 V

•

Polarity Inversion Register

Internal Power-On Reset

•

Allows Bidirectional Voltage-Level Translation

and GPIO Expansion Between:

Power Up With All Channels Configured as

Inputs

–

1.8-V SCL/SDA and

1.8-V, 2.5-V, 3.3-V, or 5-V P Port

•

No Glitch On Power Up

Noise Filter on SCL/SDA Inputs

2.5-V SCL/SDA and

1.8-V, 2.5-V, 3.3-V, or 5-V P Port

Latched Outputs With High-Current Drive

Maximum Capability for Directly Driving LEDs

3.3-V SCL/SDA and

1.8-V, 2.5-V, 3.3-V, or 5-V P Port

•

Latch-Up Performance Exceeds 100 mA Per

JESD 78, Class II

5-V SCL/SDA and

1.8-V, 2.5-V, 3.3-V, or 5-V P Port

ESD Protection Exceeds JESD 22

–

2000-V Human-Body Model (A114-A)

200-V Machine Model (A115-A)

•

I²C to Parallel Port Expander

Low Standby Current Consumption of 1 µA

1000-V Charged-Device Model (C101)

Schmitt-Trigger Action Allows Slow Input

Transition and Better Switching Noise

Immunity at the SCL and SDA Inputs

RGJ PACKAGE

(BOTTOM VIEW)

–

V_hys= 0.18 V Typ at 1.8 V

V_hys= 0.25 V Typ at 2.5 V

V_hys= 0.33 V Typ at 3.3 V

V_hys= 0.5 V Typ at 5 V

P10

P11

P12

P13

P14

P15

P16

P17

INT

V_CCI31

SDA

SCL

•

5-V Tolerant I/O Ports

RESET

Active-Low Reset Input (RESET)

Open-Drain Active-Low Interrupt Output (INT)

400-kHz Fast I²C Bus

V_CCP27

ADDR

GND

24 23 22 21 20 19 18 17

Input/Output Configuration Register

DESCRIPTION/ORDERING INFORMATION

This 24-bit I/O expander for the two-line bidirectional bus (I²C) is designed to provide general-purpose remote I/O

expansion for most microcontroller families via the I²C interface [serial clock (SCL) and serial data (SDA)].

The major benefit of this device is its wide V_CCrange. It can operate from 1.65 V to 5.5 V on the P-port side and

on the SDA/SCL side. This allows the TCA6424 to interface with next-generation microprocessors and

microcontrollers on the SDA/SCL side, where supply levels are dropping down to conserve power. In contrast to

the dropping power supplies of microprocessors and microcontrollers, some PCB components, such as LEDs,

remain at a 5-V power supply.

The bidirectional voltage level translation in the TCA6424 is provided through V_CCI. V_CCIshould be connected to

the V_CCof the external SCL/SDA lines. This indicates the V_CClevel of the I²C bus to the TCA6424. The voltage

level on the P-port of the TCA6424 is determined by the V_CCP

ORDERING INFORMATION

T_A

PACKAGE⁽¹⁾⁽²⁾

Reel of 3000

ORDERABLE PART NUMBER

TCA6424RGJR

TOP-SIDE MARKING

–40°C to 85°C

QFN – RGJ

PH424

(1) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.

(2) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI

website at www.ti.com.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCT PREVIEW information concerns products in the

formative or design phase of development. Characteristic data and

other specifications are design goals. Texas Instruments reserves

the right to change or discontinue these products without notice.

12 3 4 5 6 7...29

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TCA6424 替代型号

型号	品牌	替代类型	描述	数据表
TCA6424A	TI	功能相似	LOW-VOLTAGE 24-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT RESET AND CONFIGURATIO

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TCA6424RGJR	TI	获取价格	LOW-VOLTAGE 24-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURAT
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TCA6507	TI	获取价格	LOW-VOLTAGE 7-BIT I2C AND SMBus LED DRIVER WITH INTENSITY CONTROL AND SHUTDOWN
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TCA6507_16	TI	获取价格	Low-Voltage 7-Bit I2C and SMBus LED Driver
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