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

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

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Signal Chain Chip,RS232 Interface Chip,RS485 Interface Chip,RS422 Interface Chip

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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WAYON（维安）电路保护产品选型指南

目录- OVER-VOLTAGE PROTECTION DEVICES MV & LV MOSFET POWER MOSFET IC PRODUCTS

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Outline an Important Sub-sector of Analog Chips: Signal Chain Chips and Introduce Some Representative chips of XBLW

Signal chain chips constitute the pathway for signals from input to output in a system, encompassing the entire process of signal collection, amplification, transmission, and processing. A typical signal chain includes the following two steps: 1) converting continuous signals such as sound, light, or electromagnetic waves into digital signals represented by 0 or 1； 2) converting digital signals back into analog signals through electronic systems.

2024-11-26 - 器件选型代理服务技术支持采购服务

芯伯乐对照表

描述- 该资料提供了一系列电子元器件的对照型号和厂牌信息，包括逻辑门、定时器、模拟开关、电压调节器、运算放大器等。资料中列出了多种型号的元器件，如CD4001BE、CD40106BE、CD4021BE等，以及它们的对照型号和厂牌，如TI/德州仪器、NXP/恩智浦、ST/意法等。此外，还包括了部分特殊型号的元器件，如24C02S、24C01BN、24C02BN等，以及它们的对照型号和厂牌。

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

2023/12/28 - 芯伯乐 - 对照表代理服务技术支持采购服务

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

2023/9/19 - 芯伯乐 - 选型指南代理服务技术支持采购服务

XBLW MAX485 10 Mbps通信收发器产品规格

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

2024/9/18 - 芯伯乐 - 数据手册 - Version2.0 代理服务技术支持采购服务

基于EEPROM 24C128、LDO AMS1117、MCU ESP32的工业RS485网关解决方案

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。

2024-08-24 - 应用方案代理服务技术支持采购服务

使用3路分流器来进行相电流测量的低成本解决方案，避免使用昂贵的电流传感器

3KW工业变频器电路硬件平台适用于永磁同步电机及交流感应电机，采用先进的FOC算法。本设计方案提供一种使用3路分流器来进行相电流测量的低成本解决方案，这样避免了使用昂贵的电流传感器，另外也能使用单路分流器检测电流。

2024-03-19 - 设计经验代理服务技术支持采购服务

XBLW MAX3485 15 Mbps通信收发器产品规格

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

2024/9/18 - 芯伯乐 - 数据手册 - Version2.0 代理服务技术支持采购服务

解析如何挑选理想的RS485收发器芯片，轻松构建稳定、快速的通信网路

选择合适的RS485收发器芯片是构建稳定、快速的通信网路的关键。在选型过程中，需要充分考虑项目需求并对比不同芯片的性能和特点，以确保选择适合项目的芯片型号。同时，也要关注芯片的封装和引脚数等细节问题，以保证项目顺利实施和稳定运行。

2024-06-30 - 器件选型代理服务技术支持采购服务

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

选型表 - 芯伯乐立即选型

芯伯乐LOD、EEPROM、接口芯片等产品在ID卡智能柜锁控制板上的应用设计

智能储物柜、物品保管柜，是对传统钥匙柜的升级换代产品，智能储物柜采用与员工工牌一卡通的模式，把企业中的所有员工储物柜进行联网集中管理。员工只要刷工牌、按指纹或刷脸识别就可以打开储物柜箱门，进行物品存取。让企业可轻松管理大量员工的物品存取需求。本文介绍了芯伯乐XBLW产品在ID卡智能柜锁控制板上的应用设计。

2024-09-24 - 应用方案代理服务技术支持采购服务