TI-TRS3243.pdf_3243收发器设计资源-CSDN文库

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TI公司的TRS3243是一款高性能的RS-232收发器，设计用于在3.3V至5.5V电源电压范围内工作，适用于多种应用，包括电池供电系统、笔记本电脑、平板电脑以及手持设备等。这款器件集成了三个线路驱动器和五个线路接收器，适用于DE-9 DTE接口，能够提供±15kV的人体模型（HBM）静电放电保护，符合TIA/EIA-232-F和ITU V.28标准的要求。 TRS3243的主要特性包括： 1. 宽电压范围：该器件能在3V到5.5V的电压下运行，适合不同电源环境。 2. 高ESD防护：每个RS-232接口引脚均具有±15kV的HBM ESD保护，确保了设备在恶劣环境中的可靠性。 3. 低功耗：工作电流典型值仅为300μA，待机状态下电流典型值仅为1μA，有效节省了电源。 4. 自动功率降低功能：当没有有效的RS-232信号时，驱动器输出自动关闭，进一步降低功耗。 5. 强大的串行鼠标驱动能力：可以处理来自3.3V电源的5V逻辑输入。 6. 永远活动的非反相接收器输出（ROUT2B）： Rout2B输出始终启用，以便检查环路指示器和有效的RS-232输入。 7. 检测状态信号：INVALID信号可用于判断RS-232输入的有效性。 8. 外部电容配置：只需要4个0.1μF的电容，简化了电路设计。 9. 工作温度范围：TRS3243C为0°C至70°C，TRS3243I为-40°C至85°C，满足不同温度环境的应用需求。封装选项包括SSOP（28引脚）和TSSOP（28引脚），尺寸分别为10.20mm × 5.30mm和9.70mm × 4.40mm。在使用TRS3243时，用户需要注意数据手册中的重要通知，这涉及到产品的可用性、保修、安全关键应用的使用、知识产权问题和其他免责声明。此外，TI官方网站提供了更多关于此器件的技术文档、样片购买以及技术支持和社区资源。总而言之，TRS3243是一款高效、可靠且低功耗的多通道RS-232收发器，特别适合对电源效率和ESD防护有高要求的移动和便携式设备。其自动功率管理功能和灵活的输出控制使得它成为构建稳定RS-232通信链路的理想选择。

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POWER

3.3 V, 5 V

DIN

ROUT

DOUT

RS232

RIN

RS232

3 3

5 5

FORCEON

FORCEOFF

STATUS

INVALID

Product

Folder

Sample &

Buy

Technical

Documents

Tools &

Software

Support &

Community

TRS3243

SLLS806B –JUNE 2007–REVISED JUNE 2015

TRS3243 3-V to 5.5-V Multichannel RS-232 Line Driver and Receiver

With ±15-kV ESD (HBM) Protection

1 Features 2 Applications

• Operates With 3-V to 5.5-V V

Supply

• Battery-Powered Systems

• Single-Chip and Single-Supply Interface • Tablets

for IBM

PC/AT™ Serial Port

• Notebooks

• RS-232 Bus-Pin ESD Protection of

• Laptops

±15 kV Using Human-Body Model (HBM)

• Hand-Held Equipment

• Meets or Exceeds the Requirements of

TIA/EIA-232-F and ITU V.28 Standards

3 Description

• Three Drivers and Five Receivers

The TRS3243 device consists of three line drivers,

and five line receivers, which is ideal for DE-9 DTE

• Operates up to 250 kbps

interface. A ±15-kV ESD (HBM) protection pin-to-pin

• Low Active Current: 300-μA Typical

(serial-port connection pins, including GND). Flexible

• Low Standby Current: 1-μA Typical

power features save power automatically. Special

outputs ROUT2B and INVALID are always enabled to

• External Capacitors: 4 × 0.1 μF

allow checking for ring indicator and valid RS232

• Accepts 5-V Logic Input With 3.3-V Supply

input.

• Always-Active Noninverting Receiver

Output (ROUT2B)

Device Information

(1)

• Operating Temperature

PART NUMBER PACKAGE BODY SIZE (NOM)

– TRS3243C: 0°C to 70°C

SSOP (28) 10.20 mm × 5.30 mm

TRS3243

TSSOP (28) 9.70 mm × 4.40 mm

– TRS3243I: –40°C to 85°C

• Serial-Mouse Driveability

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

the end of the data sheet.

• Automatic Power-Down Feature to

Disable Driver Outputs When

No Valid RS-232 Signal Is Sensed

Simplified Schematic

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.

TRS3243

SLLS806B –JUNE 2007–REVISED JUNE 2015

www.ti.com

Table of Contents

1 Features.................................................................. 1 8 Detailed Description............................................ 11

8.1 Overview ................................................................. 11

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

8.2 Functional Block Diagram ....................................... 11

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

8.3 Feature Description................................................. 12

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

8.4 Device Functional Modes........................................ 13

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

9 Application and Implementation ........................ 14

6 Specifications......................................................... 4

9.1 Application Information............................................ 14

6.1 Absolute Maximum Ratings ..................................... 4

9.2 Typical Application .................................................. 14

6.2 ESD Ratings.............................................................. 4

10 Power Supply Recommendations ..................... 16

6.3 Recommended Operating Conditions....................... 4

11 Layout................................................................... 16

6.4 Thermal Information.................................................. 4

11.1 Layout Guidelines ................................................. 16

6.5 Electrical Characteristics—Power and Status........... 5

11.2 Layout Example .................................................... 16

6.6 Electrical Characteristics—Driver ............................. 5

12 Device and Documentation Support ................. 17

6.7 Electrical Characteristics—Receiver ........................ 6

12.1 Community Resources.......................................... 17

6.8 Switching Characteristics—Power and Status ......... 6

12.2 Trademarks........................................................... 17

6.9 Switching Characteristics—Driver ............................ 6

12.3 Electrostatic Discharge Caution............................ 17

6.10 Switching Characteristics—Receiver ..................... 6

12.4 Glossary................................................................ 17

6.11 Typical Characteristics............................................ 7

13 Mechanical, Packaging, and Orderable

7 Parameter Measurement Information .................. 8

Information ........................................................... 17

4 Revision History

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

Changes from Revision A (September 2011) to Revision B Page

• Added Pin Functions table, ESD Ratings table, Thermal Information table, Typical Characteristics section, Detailed

Description, Application and Implementation, Power Supply Recommendations, Layout, Device and Documentation

Support and Mechanical, Packaging, and Orderable Information sections............................................................................ 1

• Deleted Ordering Information table ........................................................................................................................................ 3

Product Folder Links: TRS3243

TRS3243

SLLS806B –JUNE 2007–REVISED JUNE 2015

www.ti.com

6 Specifications

6.1 Absolute Maximum Ratings

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

(1)

MIN MAX UNIT

Supply voltage

(2)

–0.3 6 V

Positive output supply voltage

(2)

–0.3 7 V

–

Negative output supply voltage

(2)

0.3 –7 V

– V

–

Supply voltage difference

(2)

13 V

Driver, FORCEOFF, FORCEON –0.3 6

Input voltage V

Receiver –25 25

Driver –13.2 13.2

Output voltage V

Receiver, INVALID –0.3 V

+ 0.3

Operating virtual junction temperature 150 °C

stg

Storage temperature –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.

(2) All voltages are with respect to network GND.

6.2 ESD Ratings

VALUE UNIT

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

±15000

RIN , DOUT, and GND pins

(1)

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

(ESD)

Electrostatic discharge ±3000 V

All other pins

(1)

Charged device model (CDM), per JEDEC specification JESD22-C101,

±1000

all pins

(2)

(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.

6.3 Recommended Operating Conditions

(see Figure 8)

(1)

MIN NOM MAX UNIT

= 3.3 V 3 3.3 3.6

Supply voltage V

= 5 V 4.5 5 5.5

= 3.3 V 2 5.5

DIN, FORCEOFF,

Driver and control high-level input voltage V

FORCEON

= 5 V 2.4 5.5

Driver and control low-level input voltage DIN, FORCEOFF, FORCEON 0 0.8 V

Driver and control input voltage DIN, FORCEOFF, FORCEON 0 5.5 V

Receiver input voltage –25 25 V

TRS3243C 0 70

Operating free-air temperature °C

TRS3243I –40 85

(1) Test conditions are C1–C4 = 0.1 μF at V

= 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at V

= 5 V ± 0.5 V.

6.4 Thermal Information

TRS3243

THERMAL METRIC

(1)

DB (SSOP) PW (TSSOP) UNIT

16 PINS 16 PINS

θJA

Junction-to-ambient thermal resistance 62 62 °C/W

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

report (SPRA953).

Product Folder Links: TRS3243

TRS3243

www.ti.com

SLLS806B –JUNE 2007–REVISED JUNE 2015

6.5 Electrical Characteristics—Power and Status

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)

(1)

(see Figure 8)

PARAMETER TEST CONDITIONS MIN TYP

(2)

MAX UNIT

Supply current

No load, FORCEOFF and FORCEON at V

Automatic power down 0.3 1 mA

= 25°C

disabled

Supply current

No load, FORCEOFF at GND. T

= 25°C 1 10

Powered off

μA

Supply current No load, FORCEOFF at V

, FORCEON at GND,

Automatic power down All RIN are open or grounded, All DIN are grounded. 1 10

enabled T

= 25°C

Input leakage current

= V

or V

at GND ±0.01 ±1 μA

of FORCEOFF, FORCEON

Receiver input threshold

FORCEON = GND,

IT+

for INVALID high-level output 2.7 V

FORCEOFF = V

voltage

Receiver input threshold

FORCEON = GND,

IT–

for INVALID high-level output –2.7 V

FORCEOFF = V

voltage

Receiver input threshold

FORCEON = GND,

for INVALID low-level output –0.3 0.3 V

FORCEOFF = V

voltage

= –1 mA, FORCEON = GND,

INVALID high-level output voltage V

– 0.6 V

FORCEOFF = V

= 1.6 mA, FORCEON = GND,

INVALID low-level output voltage 0.4 V

FORCEOFF = V

(1) Test conditions are C1–C4 = 0.1 μF at V

= 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at V

= 5 V ± 0.5 V.

(2) All typical values are at V

= 3.3 V or V

= 5 V, and T

= 25°C.

6.6 Electrical Characteristics—Driver

over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted)

(1)

(see Figure 8)

PARAMETER TEST CONDITIONS MIN TYP

(2)

MAX UNIT

High-level output voltage All DOUT at R

= 3 kΩ to GND 5 5.4 V

Low-level output voltage All DOUT at R

= 3 kΩ to GND –5 –5.4 V

Output voltage DIN1 = DIN2 = GND, DIN3 = V

, 3 kΩ to GND at DOUT3,

±5 V

(mouse driveability) DOUT1 = DOUT2 = 2.5 mA

High-level input current V

= V

±0.01 ±1 μA

Low-level input current V

at GND ±0.01 ±1 μA

hys

Input hysteresis ±1 V

= 3.6 V, V

= 0 V

Short-circuit output

±35 ±60 mA

current

(3)

= 5.5 V, V

= 0 V

= 0 V, V

= 0 V, and V

–

Output resistance V

= ± 2 V 300 10M Ω

0 V,

= ± 12 V, V

= 3 to 3.6 V ±25

off

Output leakage current FORCEOFF = GND, μA

= 4.5 to 5.5

= ± 10 V, ±25

(1) Test conditions are C1–C4 = 0.1 μF at V

= 3.3 V ± 0.3 V; C1 = 0.047 μF, C2–C4 = 0.33 μF at V

= 5 V ± 0.5 V.

(2) All typical values are at V

= 3.3 V or V

= 5 V, and T

= 25°C.

(3) Short-circuit durations must be controlled to prevent exceeding the device absolute power dissipation ratings, and not more than one

output should be shorted at a time.

Product Folder Links: TRS3243

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