TCA6416A扩展芯片_Tca6416资源-CSDN文库

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TCA6416A扩展芯片技术详解 TCA6416A扩展芯片是TI公司的一款低压16位I2C和SMBus I/O扩展器，具有电压翻转、中断输出、复位输入和配置寄存器等功能。该芯片可以在1.65 V到5.5 V的电源电压范围内工作，并且允许在1.8 V、2.5 V、3.3 V和5 V I2C总线和P口之间进行双向电压级翻转和GPIO扩展。功能特点： * I2C到并行端口扩展器 * 低待机电流消费仅为3 μA * 5 V耐压I/O端口 * 400 kHz快速I2C总线 * 硬件地址引脚允许两个TCA6416A设备在同一个I2C/SMBus总线上工作 * 活动低复位输入（RESET） * 开放式低复位中断输出（INT） * 输入/输出配置寄存器 * 极性反转寄存器 * 内部电源启动复位 * 电源启动时所有通道配置为输入 * 电源启动时无毛刺 * SCL/SDA输入滤波器 * latch输出具有高电流驱动能力应用场景： * 服务器 * 路由器（电信交换设备） * 个人计算机 * 个人电子设备（例如游戏机） * 工业自动化 * GPIO受限处理器产品技术参数： * 工作电压：1.65 V到5.5 V * I/O端口：16位 * I2C总线频率：400 kHz * 待机电流：3 μA * 输入/输出配置寄存器 * 极性反转寄存器 * 内部电源启动复位 * 电源启动时所有通道配置为输入 * 电源启动时无毛刺在实际应用中，TCA6416A扩展芯片可以用来扩展微控制器或处理器的GPIO能力，实现更多的输入/输出功能，例如LED驱动、键盘扫描、显示器驱动等。此外，该芯片还可以应用于工业自动化、服务器、路由器等领域，实现更多的输入/输出功能和扩展能力。在设计中，需要注意TCA6416A扩展芯片的电源电压范围、I/O端口的方向和电平、I2C总线的_frequency等参数，以确保芯片的正常工作。同时，需要注意芯片的ESD保护和 latch-up性能，以确保芯片的可靠性和稳定性。 TCA6416A扩展芯片是一款功能强大、灵活性高的I/O扩展器，广泛应用于各个领域，可以满足不同的应用需求。

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TCA6416A

C or SMBus

Master

(processor)

SDA

SCL

INT

P10

P11

P12

P13

VCCI

ADDR

GND

VCCP

P14

P15

P16

P17

P00

P01

P02

P03

P04

P05

P06

P07

RESET

Peripheral

Devices

B RESET,

ENABLE,

or control

inputs

B INT or

status

outputs

B LEDs

B Keypad

Product

Folder

Order

Now

Technical

Documents

Tools &

Software

Support &

Community

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TCA6416A

SCPS194D –MAY 2009–REVISED AUGUST 2017

TCA6416A Low-Voltage 16-Bit I

C and SMBus I/O Expander With Voltage Translation,

Interrupt Output, Reset Input, and Configuration Registers

1 Features

• I

C to Parallel Port Expander

• 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, 2.5-V, 3.3-V,

and 5-V I

C Bus and P-Ports

• Low Standby Current Consumption of 3 μA

• 5-V Tolerant I/O Ports

• 400-kHz Fast I

C Bus

• Hardware Address Pin Allows Two TCA6416A

Devices on the Same I

C/SMBus Bus

• 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

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)

2 Applications

• Servers

• Routers (Telecom Switching Equipment)

• Personal Computers

• Personal Electronics (For Example, Gaming

Consoles)

• Industrial Automation

• Products With GPIO-Limited Processors

3 Description

The TCA6416A is a 24-pin device that provides 16-

bits of general purpose parallel input/output (I/O)

expansion for the two-line bidirectional I

C bus (or

SMBus) protocol. The device can operate with a

power supply voltage ranging from 1.65 V to 5.5 V on

the I

C bus side (VCCI) and a power supply voltage

ranging from 1.65 V to 5.5 V on the P-port side

(VCCP).

The device supports both 100-kHz (Standard-mode)

and 400-kHz (Fast-mode) clock frequencies. I/O

expanders such as the TCA6416A provide a simple

solution when additional I/Os are needed for

switches, sensors, push-buttons, LEDs, fans, etc.

Device Information

(1)

PART NUMBER PACKAGE BODY SIZE (NOM)

TCA6416A

TSSOP (24) 7.80 mm × 4.40 mm

WQFN (24) 4.00 mm × 4.00 mm

BGA Microstar

Junior (24)

3.00 mm × 3.00 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Simplified Schematic

TCA6416A

SCPS194D –MAY 2009–REVISED AUGUST 2017

www.ti.com

Product Folder Links: TCA6416A

Table of Contents

1 Features.................................................................. 1

2 Applications ........................................................... 1

3 Description ............................................................. 1

4 Revision History..................................................... 2

5 Pin Configuration and Functions......................... 3

6 Specifications......................................................... 5

6.1 Absolute Maximum Ratings ..................................... 5

6.2 ESD Ratings.............................................................. 5

6.3 Recommended Operating Conditions....................... 5

6.4 Thermal Information.................................................. 6

6.5 Electrical Characteristics........................................... 7

6.6 I

C Interface Timing Requirements........................... 8

6.7 Reset Timing Requirements ..................................... 8

6.8 Switching Characteristics.......................................... 8

6.9 Typical Characteristics.............................................. 9

7 Parameter Measurement Information ................ 12

8 Detailed Description............................................ 16

8.1 Overview ................................................................. 16

8.2 Functional Block Diagrams ..................................... 17

8.3 Feature Description................................................. 18

8.4 Device Functional Modes........................................ 19

8.5 Programming .......................................................... 19

8.6 Register Maps......................................................... 20

9 Application and Implementation ........................ 25

9.1 Application Information............................................ 25

9.2 Typical Application ................................................. 26

10 Power Supply Recommendations ..................... 29

10.1 Power-On Reset Requirements ........................... 29

11 Layout................................................................... 31

11.1 Layout Guidelines ................................................. 31

11.2 Layout Example .................................................... 32

12 Device and Documentation Support ................. 33

12.1 Trademarks........................................................... 33

12.2 Electrostatic Discharge Caution............................ 33

12.3 Glossary................................................................ 33

13 Mechanical, Packaging, and Orderable

Information ........................................................... 33

4 Revision History

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.

Changes from Revision C (September 2015) to Revision D Page

• Changed the t

vd(data)

MAX value From: 1 µs To: 0.9 µs in the I

C Interface Timing Requirements table............................... 8

• Changed the t

vd(ack)

MAX value From: 1 µs To: 0.9 µs in the I

C Interface Timing Requirements table................................ 8

Changes from Revision B (January 2015) to Revision C Page

• Changed units for t

and t

parameters from ns to µs.......................................................................................................... 8

Changes from Revision A (November 2009) to Revision B Page

• Added ESD Ratings table, Feature Description section, Device Functional Modes, Application and Implementation

section, Power Supply Recommendations section, Layout section, Device and Documentation Support section, and

Mechanical, Packaging, and Orderable Information section. ................................................................................................ 1

TCA6416A

SCPS194D –MAY 2009–REVISED AUGUST 2017

www.ti.com

Product Folder Links: TCA6416A

Pin Functions

DESCRIPTION

NAME

TSSOP

(PW)

QFN

(RTW)

BGA

(ZQS)

INT 1 22 A3 Interrupt output. Connect to V

CCI

or V

CCP

through a pull-up resistor.

VCCI 2 23 B3 Supply voltage of I

C bus. Connect directly to the supply voltage of the external I

C master.

RESET 3 24 A2

Active-low reset input. Connect to V

CCI

or V

CCP

through a pull-up resistor, if no active connection

is used.

P00 4 1 A1 P-port input/output (push-pull design structure). At power on, P00 is configured as an input.

P01 5 2 C3 P-port input/output (push-pull design structure). At power on, P01 is configured as an input.

P02 6 3 B1 P-port input/output (push-pull design structure). At power on, P02 is configured as an input.

P03 7 4 C1 P-port input/output (push-pull design structure). At power on, P03 is configured as an input.

P04 8 5 C2 P-port input/output (push-pull design structure). At power on, P04 is configured as an input.

P05 9 6 D1 P-port input/output (push-pull design structure). At power on, P05 is configured as an input.

P06 10 7 E1 P-port input/output (push-pull design structure). At power on, P06 is configured as an input.

P07 11 8 D2 P-port input/output (push-pull design structure). At power on, P07 is configured as an input.

GND 12 9 E2 Ground

P10 13 10 E3 P-port input/output (push-pull design structure). At power on, P10 is configured as an input.

P11 14 11 E4 P-port input/output (push-pull design structure). At power on, P11 is configured as an input.

P12 15 12 D3 P-port input/output (push-pull design structure). At power on, P12 is configured as an input.

P13 16 13 E5 P-port input/output (push-pull design structure). At power on, P13 is configured as an input.

P14 17 14 D4 P-port input/output (push-pull design structure). At power on, P14 is configured as an input.

P15 18 15 D5 P-port input/output (push-pull design structure). At power on, P15 is configured as an input.

P16 19 16 C5 P-port input/output (push-pull design structure). At power on, P16 is configured as an input.

P17 20 17 C4 P-port input/output (push-pull design structure). At power on, P17 is configured as an input.

ADDR 21 18 B5 Address input. Connect directly to V

CCP

or ground.

SCL 22 19 A5 Serial clock bus. Connect to V

CCI

through a pull-up resistor.

SDA 23 20 A4 Serial data bus. Connect to V

CCI

through a pull-up resistor.

VCCP 24 21 B4 Supply voltage of TCA6416A for P-ports

TCA6416A

www.ti.com

SCPS194D –MAY 2009–REVISED AUGUST 2017

Product Folder Links: TCA6416A

(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.

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

6 Specifications

6.1 Absolute Maximum Ratings

(1)

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

MIN MAX UNIT

CCI

Supply voltage –0.5 6.5 V

CCP

Supply voltage –0.5 6.5 V

Input voltage

(2)

–0.5 6.5 V

Output voltage

(2)

–0.5 6.5 V

Input clamp current ADDR, RESET, SCL V

< 0 ±20 mA

Output clamp current INT V

< 0 ±20 mA

IOK

Input/output clamp current

P port V

< 0 or V

> V

CCP

±20

SDA V

< 0 or V

> V

CCI

±20

Continuous output low current

P port V

= 0 to V

CCP

SDA, INT V

= 0 to V

CCI

Continuous output high current P port V

= 0 to V

CCP

50 mA

Continuous current through GND 200

mAContinuous current through V

CCP

160

Continuous current through V

CCI

stg

Storage temperature –65 150 °C

(1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.

(2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.

6.2 ESD Ratings

VALUE UNIT

(ESD)

Electrostatic discharge

Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001

(1)

±2000

Charged-device model (CDM), per JEDEC specification JESD22-

C101

(2)

±1000

(1) The SCL and SDA pins shall not be at a higher potential than the supply voltage V

CCI

in the application, or an increase in current

consumption will result.

6.3 Recommended Operating Conditions

MIN MAX UNIT

CCI

Supply voltage 1.65 5.5

CCP

Supply voltage 1.65 5.5

High-level input voltage

SCL, SDA 0.7 × V

CCI

(1)

VRESET 0.7 × V

CCI

5.5

ADDR, P17–P00 0.7 × V

CCP

5.5

Low-level input voltage

SCL, SDA, RESET –0.5 0.3 × V

CCI

ADDR, P17–P00 –0.5 0.3 × V

CCP

High-level output current P17–P00 10 mA

Low-level output current P17–P00 25 mA

Operating free-air temperature –40 85 °C

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