XBLW Xinbole Analog Chips: Signal Chain Chips (Part 3)

时间： 2024-06-22 来源：XBLW Official Website

技术问答

Introduction to Signal Chain Chips: RTC real-time clock chips and serial communication interfaces

Previously, we introduced the rtc real-time clock chips within signal chain chips. Today, we continue our journey into another signal chain chip. Data transfer between computers or between a computer and a terminal employs two methods: serial communication and parallel communication. Serial communication is widely adopted due to its low wire usage, low cost, and particularly its ability to avoid inconsistencies in multiple wire characteristics during long-distance transmission. Our company has developed RS232 and RS422/RS485 serial communication interface chips following the serial data communication interface standard protocols established by the Electronic Industries Alliance (EIA).

1.RS232 Interface Chip

After years of improvements in RS-232 devices and communication technologies, XBLW has introduced three RS232 interface chips that meet market demands. These chips have the following features:

- Compliance with TIA/EIA-232-F and ITU V.28 standards

-High transmission speed, up to 250Kbps

-Wide voltage range, 3.3~5.0V

- I/O pins with over ±15KV ESD protection (HBM)

- Dual drivers and receivers

- DIP-16/SOP-16 packaging

General PIN definitions

Typical application circuit for RS232 interface chips

Application fields

- Industrial control motherboards
- Optical transceivers
- Industrial controllers
- New energy charging stations
- Programmer downloaders

- Emulators

2. RS422/RS485 Interface Chip

RS485(commonly referred to as RS485/EIA-485) is a standard for electrical characteristics defining a 2-wire, half-duplex, multipoint communication system, differing significantly from RS-232. It uses the voltage difference between the cable ends to transmit signals. RS485 specifies the electrical characteristics for both the receiver and transmitter.

RS485 chip features

1. Low interface level**: RS485 electrical characteristics define logic "1" with voltage difference of +(2 ~ 6)V and logic "0" with a voltage difference of -(2 ~ 6)V. The interface signal level is lower than RS232, reducing the likelihood of damaging the interface circuit chip. This level is also TTL compatible, facilitating connection with TTL circuits.

2. High transmission speed**: at 10 meters, RS485's maximum data transmission speed can reach 35Mbps, while at 1200 meters, the speed can reach 100Kbps.

3. Strong anti-interference ability**: RS485 interfaces use a combination of balanced drivers and differential receivers, enhancing common-mode interference resistance and noise immunity.

4.Long transmission distance and multiple nodes**: RS485 bus can transmit over 1200 meters (speed ≤ 100Kbps) and typically supports up to 256 nodes, with a maximum capacity of 400 nodes.

5. Wide operating voltage range: 3~5.5V

6. I/O pins with over ±15KV ESD protection (HBM)**

7. Low static current: typical value around 300uA

8.Packaging: DIP-8/SOP-8

9. Industrial temperature range: -40~85℃

PIN Definitions

Hardware circuit design for RS485 chip

RS485 circuit design can be divided into isolated and non-isolated types. Below is a non-isolated circuit, where the b terminal is pulled down to gnd and the a terminal is pulled high via a resistor to ensure the voltage difference between a and b exceeds 200mv. De and re pins are for send and receive enable; re is low for receive enable, and de is high for send enable. In applications, these two are typically connected together and controlled via an io port (RS485_en). Since the chip is either in send or receive mode, the RS485_en signal is set high for sending data and low for receiving data.

RS485 automatic send-receive circuit hardware design

The automatic send-receive circuit differs from the ordinary 485 circuit by adding a transistor to control the 485 enable pin. R9 is a current-limiting resistor, generally 4.7K, and R8 is a pull-up resistor, also typically 4.7K. The enable pin is pulled high when the transistor is not conducting.

![RS485 automatic send-Receive circuit design](6.Jpg)

RS485 interface lightning protection circuit design

GND design for RS485 interface circuit PCB

Protective devices indicated by dashed lines should be placed as close to the interface as possible, arranged compactly and neatly, with protective devices placed before filter devices.

Application fields

-Industrial automation: RS485 is often used for communication between plcs (programmable logic controllers) to enable data exchange between devices. Industrial buses based on RS485, such as modbus and profibus, are widely used for connecting multiple devices to achieve remote monitoring and control.

-Building automation: RS485 is frequently used for the control and management of intelligent buildings. Through the RS485 bus, various devices (e.g., lighting systems, air conditioning systems, security systems) can be connected to a centralized management system for remote monitoring, adjustment, and management.

-Data acquisition and monitoring systems: RS485 interfaces can connect multiple sensors and actuators, transmitting real-time environmental data to a central processor or monitoring system for real-time monitoring and control of environmental parameters.

XBLW has launched various RS232 and RS422/ RS485 serial communication interface chips, which have been widely applied in industrial control, instrumentation, multimedia networks, and mechatronics products. Our company can provide reasonable guidance on chip selection and circuit design based on user needs. We hope this article helps you understand RS232 and RS422/ RS-485 interface chips better.

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本文由Ray转载自XBLW Official Website，原文标题为:XBLW Xinbole Analog Chips: Signal Chain Chips (Part 3)，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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芯伯乐模拟芯片之信号链芯片：RS232和RS422/RS485串口通讯接口芯片介绍

XBLW芯伯乐推出的多款RS232和RS422/RS485串口通讯接口芯片，已广泛应用于工业控制、仪器、仪表、多媒体网络、机电一体化产品等诸多领域。本公司可根据用户需求选型和电路的设计给出合理指导意见，希望本文对了解RS232和RS422/RS-485接口芯片带来一定帮助和了解。

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产品发布时间 : 2024-05-07

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产品发布时间 : 2024-05-08

芯伯乐对照表

型号- SN74HC273N,ULN2004AN,LM339DTR,MC74HC139AN,HEF4094BT,UC3844BD1013TR,DS1307DTR,74HC4053D,653,HEF4094BP,MC34063ACD-TR,AT24C08C-SSHM-T,HEF4071BP,MAX485ESA,TDA2050A,MC74HC192AN,TC4427EOA,SN74HC175N,TC74HC161AP,SN74HC163N,LM331N/NOPB,74HC374D,653,SN74HC151N,24LC02B-I,CD4051BDTR,SN74HC42N,CD4071BE,CD4094BE,CD4021BCN,24LC02B-P,KA3842A,SN74HC245DTR,ICM7555ESA+T,LM393AN,HEF4082BP,SN74HC244DWR,HCF4021BE,MC74HC32AN,24C64BN,M24C02-WMN6TP,LMV324DR2G,LM1117IMPX-1.8/NOPB,AT24C32C-PUM,ULN2803AN,IR4426STRPBF,74HC10N,LM324N,DS1307Z+T&R,LM337KTTR,CD4082BE,ACS712ELCTR-30AT,HEF4072BP,SN74HC244DTR,SN74HC4051DTR,LM393DR,LM393DT,ST3485ECDR,LM337S,M74HC10B1R,NE5532DR,LM337T,M24C32-WMN6TP,CAT24C02WI-GT3,M24C16-WBN6P,KA3525A,AZ1117CR-5.0TRG1,TC74HC160AP,SN74HC161N,SN74HC32N,SN74HC20N,LM2904DR2G,CD4093BE,M74HC374B1R,HEF4060BT,74HC20N,SA5532DR,MC74HC10AN,HCF4043BE,MAX232CSE,MC74HC238AN,SN74HC165DTR,74HC32N,TC4426COA,AT24C64D-PUM,SN74HC374N,AT24C02C-SSHM-T,SN74HC21N,LMV321IDBVR,MAX3485CSA,LD1117S50CTR,ULN2803APG,MC74HC273ADWR2G,LMV358LIST,HCF4012BE,MC74HC00AN,UC3842BD1R2G,MAX232EDTR,LM317LZ/NOPB,M24C32-WBN6P,SN74HC240N,SN74HC373N,TL3844BDR,LM317LD13TR,CD4052BDTR,24C16N,MAX3232CSE,24C04N,TC74HC4052AF,SN74HC10N,ST485ECDR,LM331MX/NOPB,MC74HC11AN,CD4050BE,TC74HC273AP,TC74HC07AP,PCF8563DTR,74HC14N,MC74HC573ADWR2G,74HC02N,IX4426NTR,CD4012BCN,KA3843A,TC74HC151AP,TL3845BDR,MC74HC138AN,ULN2001DTR,MC33063ADR,SN74HC47N,74HC273D,653,SN74HC11N,LM324DR2G,HEF4093BP,GT7555CDTR,MAX485EBDTR,NCP1117LPST18T3G,MC74HC244ADWR2G,MC34063DR2G,LM317T,TC4426COA713,74HC11N,LM317S,L78M05CDT-TR,SN74HC153N,SP3485CN-L/TR,KA3844A,AZ1117R-5.0TRE1,24LC02B/SN,SN74HC165N,ULN2804APG,24C02N,M74HC00B1R,MC74HC126AN,CP116ADTR,CD4072BE,UC3844BD1R2G,CAT24C128WI-GT3,SN74HC00N,74HC244D,653,HEF4081BP,TC74HC08AP,M74HC259B1R,MC74HC259AN,UC3842AD8TR,M74HC11B1R,TC4426EOA,ULN2004ADR,TC4428EOA13,TL074CDTR,74HC00N,24C02S,M74HC161B1,L293D,74HC245D,653,TC4428COA713,TC74HC192AP,SN74HC192N,24LC64B/SN,TL081CDTR,TC74HC139AP,AZ1117R-3.3TRE1,MC74HC244AN,LM331DTR,MC74HC86AN,LM2903DR2G,AT24C64C-PUM,CD4053BDTR,TL074CDR,TL074CDT,TL3843BDR,L293DNE,AT24C16C-PUM,M74HC02B1R,M74HC273B1R,TL062CDR,CAT24C32WI-GT3,CD4049BE,TL062CDT,24C08N,MAX3232EDTR,MC74HC373ADWR2G,NE5532N,74HC151N,24LC16B-P,NE5532P,MC74HC74AN,MC14050BCP,24LC16B-I,HCF4025BE,UC3845BDTR,TC4428COA,CP2139CN,UC3845BD1013TR,TC74HC138AP,MC14094BDR2G,SN74HC190N,24LC01B/SN,74HC160N,TC74HC14AP,MC74HC245AN,HCF4013BE,CD4077BCN,L293WS,LM324DTR,TL084CDTR,MC14072BCP,CA3140EZ,MC33063DR2G,SN74HC574DWR,ULN2003D1013TR,L7812CV,LM556CN,AMS1117-1.8,24LC16B/SN,IR4428STRPBF,TDA2030AV,CD4025BE,MC14049BCP,TL062CDTR,TC74HC126AP,74HC4052D,653,HCF4001BE,74HC161N,TC74HC02AP,SG3525ADTR,M74HC238B1R,74HC04N,TC74HC259AP,MC7805CTG,SG3525AN,SN74HC160N,SN74HC390N,SG3525ADWR2G,LM337T/NOPB,MC14013BCP,CD4081BE,MC74HC4053ADR2G,CD4043BCN,HEF4050BP,ULN2004APG,LM1117IMPX-3.3/NOPB,LMV358IDT,CAT24C16LI-G,LMV358IDR,TDA2030A,MC74HC574AN,TC4427COA,MC74HC374ADWR2G,SP232ECN-L/TR,SN74HC86N,SN74HC74N,LM78M05CDTX/NO,SP3232ECN-L/TR,L298P,CD4094BM96,L298N,CD4051BM96,LMV324IDR,M74HC192B1R,ICM7555IBAZ-T,LM2904DT,TL082CDTR,MC14071BCP,LMV324IDT,AT24C08C-PUM,24LC08B/SN,TC4428EOA,MIC29302N,LM1875T/NOPB,LM2904DR,LM324SNG,74HC07N,74HC373D,653,LMV321SN3T1G,ICL7555IBAZ,ULN2003APG,MC14082BCP,UC3844BDTR,AT24C128CSSHM-T,MC74HC20AN,M74HC14B1R,74HC192N,24C32BN,MAX3485EEDTR,NCP1117LPST50T3G,ULN2803ADWR,MC74HC573AN,CD4060BDTR,LD1117S18CTR,TL061CDTR,TLC555CDR,LM339DR,SP3232EEN-L/TR,74HC08N,24LC04B-I,M74HC240B1R,TL064CDT,LMV321LILT,LM339DT,ACS712ELCTR-20AT,TL064CDR,24LC04B-P,TC74HC04AP,ULN2003ADR2G,PB,HCF4049BE,MC14025BCP,DS1302ZN+T&R,LMV358MM/NOPB,SN74HC273DWR,AT24C01C-SSHM-T,TL3842BDR,UC3845AD8T,SN74HC14DTR,LM2903DR,TC74HC238AP,M24C16-WMN6TP,LM2903DT,CAT24C08WI-GT3,UC3843BNG,TL071CDT,AZ1117CR-3.3TRG1,ULN2803ADTR,M74HC138B1R,AT24C64C-SSHM-T,CD4060BM96,M74HC574B1R,AT24C08D-PUM,UC3844AD8T,MC74HC240AN,ULN2001ADR,TL071CDTR,GT3140ADTR,HCF4071BE,HCF4094BE,TC74HC244AP,CD74HC4051M96,TC74HC32AP,MC14093BCP,MC34063ADR,74HC574D,653,74HC595D,74HC244D,M24C08-WMN6TP,M24C04-WMN6TP,ULN2004D1013TR,MC14012BCP,DS1302DTR,MC14081BCP,HEF4021BP,SP3232EEN-LR,UC3845N,CD4094BDTR,HCF4082BE,MC74HC165AN,LM358BDTR,74HC4051D,653,74HC244N,MC74HC373AN,TC74HC20AP,24LC02BT-I/OT,74HC374D,IR4427STRPBF,LM1875T,L78M05HDTR,ULN2804ADWR,LM317LDR2G,TL082CDR,LM317TG,CD4021BE,ULN2803AFWG,CD4050BCN,LM2903DTR,M24C04-WBN6P,CAT24C02LI-G,MC14001BCP,CD4049BCN,M74HC151B1R,TC74HC573AP,HCF4093BE,24LC08B-I,SN74HC273DTR,UC3845AN,UC3843BDTR,TC74HC10AP,74HC374N,M74HC04B1R,LM393P,UC3844BNG,MC74HC112N,AT24C04D-PUM,24LC08B-P,M74HC139B1R,CD4052BM96G3,TL082CN,LM393N,MC34063ADTR,GT4427DTR,LM321DTR,MC74HC07AN,AMS1117-5.0,SG3525ANG,24C04BN,CAT24C64LI-G,SP232EEN-L/TR,LMV358DR2G,TL082CDT,LM358DMR2G,ULN2803A,LMV358AMDTR,SN74HC238N,MC78M05CDTRKG,SN74HC541N,SN74HC595DTR,M74HC74B1R,AT24C32C-SSHM-T,TL071CDR,MC74HC374AN,HCF4081BE,MC14094BCP,LM324DT,UC3845BD1R2G,LG9110,74HC595D,118,UC3842BD1013TR,ICM7555CD,CAT24C01WI-GT3,UC3844BN,LM324DR,LM358DTR,DS1307ZN+T&R,TL061CDR,HEF4077BP,LM393DTR,TL08

对照表 - 芯伯乐 - 2023/12/28 PDF 中文下载

XBLW MAX485 10 Mbps communication transceiver Product Specification

型号- MAX485 SERIES,MAX485EN,MAX485EDTR,MAX485,MAX485EMDTR

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芯伯乐（XBLW）半导体器件选型指南

描述- 芯伯乐产品专注于消费类和工业类市场。主要产品有电源管理IC、低功耗LDO、三端稳压、高中低压MOS管、马达驱动、接口RS485/RS232、达林顿及逻辑电路等。产品广泛应用于无人机、机器人、电源、计算机、仪器仪表、玩具、家电、通讯设备、照明应用、汽车电子、工业自动化设备等领域。

型号- UC2843,DS1302,UC2842,CP2139,TEA2025,UC2845,UC2844,DS1307,CD4069,74HC20,CD4073,CD4072,NE556,TL494,NE555,CD4077,24C128,CD4071,KA7500,CD4070,LM317,LM324B,74HC32,74系列,74HC595,50N06D,CD4066,74HC238,24C256,CD4060,74HC00,LM1875,74HC02,74HC04,74HC07,CP2119,CD4094,CD4518B,CD4093,SN65LBC184,74HC11,74HC14,MAX3485E,24C64,CD4511,74HC10,74HC573,74HC574,MAX3082E,74LVC00,74HC4053,74HC08,74HC4051,74HC4052,CD4082,CD4081,74XX,LMV321,CD4543,MAX3085E,LM239,LM358,CD4538,CD4541,LMV324,24C32,L7805,74HC151,74HC273,74HC153,LM321,LM324,MC33063,24C08,MAX202,74HC123,74HC244,74HC245,74HC126,24C02,24C01,24C04,DS18B20,SN75LBC184,74HC240,LM337,L78MXXH,SN65176,LM339,AMS1117,74HC132,74HC374,50P06D,74HC138,74HC259,74HC139,24C16,74HC373,L293D,CD40106,MAX3490E,ICL7660,LMV358,TDA2822,74XX系列,MAX3491E,TDA2030,74HC192,74HC193,MAX3088E,LM393,MAX481,MAX483,MAX485,MAX487,TLC555,74HC86,74HC165,TL071,MAX489,TL072,MAX488,TDA2003,ULN2001,ULN2002,CD4013,CD4012,CD4011,TL074,MAX3232,74HC160,74HC161,ULN2003,CP116,ULN2004,CP118,74HC164,4000,LM139,ULN2803,CP6208,ULN2804,LM2575,LM258,LM2576,SN75176,MAX232,MC34063,TL082,TL081,CD4001,TL084,24C512,4000系列,LM741,BISSS0001,74LVC1G14,LM2904,CD4027,CD4025,LM2901,LM2903,93C46,74HC540,74HC541,PCF8563,74HCT14,CD4528B,LM2596,MAX490,CD4017,MAX491,74HC74,L298N,CD4020,TL061,TL064,TL062,CD4021,CD4049,NE5532,CD4053,CD4052,93C66,CD4051,CD4050,SG3526,SG3524,L9110S,SG3525,UC3845,UC3846,CP1511,74LVC1G04,OP07C,UC3842,UC3843,UC3844,LM358B,74LVC1G08,TDA2050,93C56,CD4040,74HC533,74HC534,CD4043,LM293

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工业智能网关是工业互联网的核心设备之一，它承担着连接设备、搜集数据、分析数据、设备控制和实现设备智能化管理的重要任务。本文介绍了芯伯乐基于ESP32的工业RS485网关解决方案。

应用方案发布时间 : 2024-08-24

XBLW MAX3485 15 Mbps communication transceiver Product Specification

型号- MAX3485 SERIES,XBLW MAX3485,MAX3485,XBLW MAX3485EMDTR,XBLW MAX3485EN,XBLW MAX3485EDTR

数据手册 - 芯伯乐 - Version2.0 - 2024/9/18 PDF 英文下载

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CAD模型库 - 芯伯乐 - 2024/9/9 RAR 英文下载

芯伯乐收发器选型表

芯伯乐提供RS-232收发器和RS-485收发器的参数选型，工作电压(V)：3~5.5V，双工模式为半双工和全双工，节点数量（个）：128~256个，传输速率：120kbits~10Mbps，湿气敏感性等级：3级(168小时)，工作温度(℃) ：-40~85℃，SOP-16 /DIP-16/DIP-8/MSOP-8/SOP封装形式。

产品型号	品类	工作电压(V)	双工模式	节点数量（个）	通道数	传输速率	湿气敏感性等级	等级认证标准	工作温度(℃)	封装
MAX3232EDTR	RS-232收发器	3.3~5.0V	-	-	2*2	250kbits	3级(168小时)	SGS,ISO9001，ISO14001	-40~85℃	SOP-16