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TCA6424A

更新时间： 2024-09-26 05:53:55

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
33页	540K
描述
LOW-VOLTAGE 24-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT RESET AND CONFIGURATION REGISTERS

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TCA6424A 数据手册

TCA6424A

www.ti.com

SCPS193B –JULY 2010–REVISED SEPTEMBER 2010

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

WITH INTERRUPT OUTPUT, RESET, AND CONFIGURATION REGISTERS

Check for Samples: TCA6424A

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 mA

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/RSM 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

CCI

SDA

•

5-V Tolerant I/O Ports

SCL

Exposed

Center Pad

Active-Low Reset Input (RESET)

Open-Drain Active-Low Interrupt Output (INT)

400-kHz Fast I²C Bus

RESET

CCP

ADDR

GND

Input/Output Configuration Register

If used, the exposed center pad must be

connected as a secondary ground or left

electrically open.

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 TCA6424A 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.

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.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...33

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TCA6424A 替代型号

型号	品牌	替代类型	描述	数据表
TCA6424	TI	功能相似	LOW-VOLTAGE 24-BIT I2C AND SMBus I/O EXPANDER WITH INTERRUPT OUTPUT, RESET, AND CONFIGURAT

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