MAX232IDG4 - Dual 120kbps RS-232 Transceiver | Texas Instruments
부품 번호: MAX232IDG4 ✓ 활성MAX232IDG4 개요
An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line levels and converts incoming RS-232 signals back into digital logic. Within the broader hierarchy, the MAX232 is a serial-interface transceiver, placing it under interface ICs and data-conversion components used to connect computer, industrial-control, and embedded systems to older RS-232 equipment.
The MAX232IDG4 implements the EIA-232 and V.28 signaling requirements described by the manufacturer. Its dual-channel architecture allows one package to serve two RS-232 ports. A charge-pump circuit generates the positive and negative voltages required by the drivers from one 5 V supply, eliminating the need for a separate bipolar supply. The charge-pump network requires 1.0 µF capacitors.
Key electrical features include ±30 V receiver input levels, 120 kbit/s operation, and low supply current with a typical value of 8 mA. The driver output swing reaches approximately ±9 V, while the receiver converts the RS-232 line voltage into CMOS-compatible logic. The integrated ESD protection is specified at ±2 kV, making the interface suitable for equipment where cables can introduce electrostatic discharge.
Typical uses include industrial controller serial ports, configuration interfaces on embedded systems, test and measurement equipment, and service connections for legacy computer peripherals. Because RS-232 is a point-to-point, unbalanced standard, the MAX232IDG4 is best placed between a host UART and a protected external connector rather than used as a multi-drop network interface.
The main design consideration is charge-pump capacitor and connector layout. Place the 1.0 µF capacitors close to the charge-pump pins, route driver outputs and receiver inputs away from sensitive digital signals, and provide the connector-side protection and chassis-ground strategy required by the target equipment standard. Confirm signal levels and polarity in the system firmware or hardware interface before deployment.
This product page combines manufacturer specifications, verified price evidence, strict same-package replacement options, and practical interface-layout guidance to support component selection, PCB reuse, and robust RS-232 implementation.
드롭인 대체품: MAX232IDG4 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MAX232IDG4 (동일 폼 팩터 및 풋프린트) — 차이점: Package, Data Rate, ESD Protection, Function, Interface Standard.
MAX232ID
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →MAX232D
✅ 드롭인 ⚠️ 사양 미검증가격 문의
데이터시트 보기 →MAX232CSE+T
✅ 드롭인가격 문의
데이터시트 보기 →SP232AEN-L/TR
✅ 드롭인가격 문의
데이터시트 보기 →MAX202CDR
✅ 드롭인가격 문의
데이터시트 보기 →MAX232IDG4 사양
| Product Type | Dual RS-232 line-driver and receiver transceiver |
| Number of Driver Channels | 2 channels |
| Number of Receiver Channels | 2 channels |
| Maximum Data Rate | 120 kbit/s |
| Single-Supply Operation | 5 V |
| RS-232 Driver Output Level | Approximately +9 V to -9 V |
| Receiver Input Voltage Range | ±30 V |
| ESD Protection | ±2 kV |
| Charge-Pump Capacitance | 1.0 µF per charge-pump capacitor |
| 공급 전류 | 8 mA typical |
| 동작 온도 범위 | -40 °C to 85 °C |
| 패키지 | 16-pin SOIC |
| 실장 유형 | Surface mount |
| Interface Standard | EIA-232 / V.28 |
| AEC-Q100 Qualification | Not applicable |
MAX232IDG4 16-pin soic 핀 구성 가이드
MAX232IDG4(16-pin soic 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: MAX232IDG4.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
MAX232IDG4 적합 용도: 6 애플리케이션s: Industrial Controller Serial Port, Embedded Equipment Configuration Port, Test and Measurement Instrument, Legacy Computer Peripheral Connection, Data Acquisition and Control Unit, Service and Diagnostics Interface.
Industrial Controller Serial Port
The MAX232IDG4 fits industrial controllers that expose a legacy RS-232 service or configuration port alongside a modern UART. Two transmitters and two receivers support full-duplex command and response traffic, while the 120 kbit/s rate accommodates parameter uploads, diagnostic logs, and controller maintenance protocols. Operation from one 5 V rail simplifies the interface power budget, and the -40 °C to 85 °C rating suits common industrial ambient conditions. Place the 1.0 µF charge-pump capacitors close to their pins, route each driver output directly toward its connector, and keep receiver traces away from switching nodes.
추천
Embedded Equipment Configuration Port
The MAX232IDG4 provides a practical RS-232 commissioning channel for embedded controllers, test fixtures, and field-service equipment. The dual-channel arrangement can assign separate paths for transmit commands and receive status responses, avoiding a second transceiver when only one direction is active. Its 5 V supply, 120 kbit/s maximum rate, and approximately ±9 V driver output are suitable for many UART-based service protocols. Ensure the host uses the correct RS-232 logic polarity, install protection at an exposed connector, and reserve the unused channel pins according to the manufacturer's pin-description table.
추천
Test and Measurement Instrument
The MAX232IDG4 can connect laboratory and production instruments to a RS-232 control computer, allowing remote adjustment, status polling, and automated test sequences. A maximum rate of 120 kbit/s is more than adequate for many command-oriented RS-232 links, while ±30 V receiver-input tolerance adds margin for imperfect cable transients. The two transmitter and two receiver channels support a complete communications path in one package. Keep the cable interface physically separated from sensitive analog circuitry, use a defined connector-to-chassis grounding strategy, and verify input thresholds against the production test equipment.
추천
Legacy Computer Peripheral Connection
The MAX232IDG4 bridges a modern host UART to a legacy RS-232 peripheral using the familiar dual-driver and dual-receiver arrangement. Its 120 kbit/s capability supports printers, service consoles, programmer adapters, and equipment with command-response traffic. The integrated charge pump derives bipolar driver voltages from one 5 V supply, avoiding a separate negative rail in the host. Because RS-232 is point-to-point, terminate only the intended connection, do not extend it into a multi-drop bus, and use an appropriate connector shield or chassis-ground implementation to reduce noise and electrostatic-discharge exposure.
추천
Data Acquisition and Control Unit
The MAX232IDG4 can provide a host-facing RS-232 control and data port on data-acquisition equipment, signal-conditioning systems, and laboratory controllers. Two channels can carry commands and telemetry when the protocol supports simultaneous traffic, while 120 kbit/s provides adequate throughput for many status and configuration transactions. The single 5 V operating supply simplifies isolated power architecture, and receiver tolerance to ±30 V helps manage cable-induced excursions. Use controlled ground referencing, place input protection near the connector, and separate the RS-232 traces from high-impedance sensor front ends to prevent switching transients from affecting measurements.
추천
Service and Diagnostics Interface
The MAX232IDG4 supports compact service interfaces in instruments, industrial appliances, and networked controllers that retain an RS-232 diagnostic connector. The dual transceiver arrangement allows a technician's terminal to exchange commands and diagnostic information while the equipment operates from a single 5 V rail. Its specified 120 kbit/s rate and -40 °C to 85 °C range align with many service-console protocols and industrial operating environments. For exposed ports, combine the device's ±2 kV ESD rating with connector-side protection and a chassis-ground design, and validate cable length and signal integrity at the intended communication rate.
추천
추천 제품 요약
엔지니어링 참조 데이터: MAX232IDG4 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MAX232ID | MAX232D | MAX232CSE+T | SP232AEN-L/TR | MAX202CDR |
|---|---|---|---|---|---|---|
| Package | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Silicon Labs | Texas Instruments |
| Transceiver Configuration | 2 drivers and 2 receivers | 2 drivers and 2 receivers | 2 drivers and 2 receivers | 2 drivers and 2 receivers | Dual transmitter and receiver | 2 drivers and 2 receivers |
주요 차별점
- Two complete RS-232 channels in one package (vs SP232AEN-L/TR)
- Clearly specified industrial temperature range (vs MAX232D)
- Receiver input tolerance supports protected cable connections (vs MAX202CDR)
- Single 5 V rail with integrated charge pump (vs MAX232CSE+T)
설계 노트
Place the two 1.0 µF charge-pump capacitors close to the corresponding MAX232IDG4 pins and keep their return-current paths short. These capacitors continuously exchange charge to create the bipolar driver rails, so long loops can increase radiated noise and reduce stability margin. Match the capacitor type, tolerance, and voltage rating to the manufacturer reference circuit, and avoid routing the charge-pump node beneath sensitive analog circuitry.
Route RS-232 driver outputs as short, impedance-controlled point-to-point traces toward the connector, and keep receiver inputs away from charge-pump and switching traces. Use a solid ground reference and a deliberate connector-to-chassis grounding strategy. Because RS-232 is unbalanced, do not treat the receiver input as a high-speed differential signal or add termination intended for a terminated cable network.
Do not treat the MAX232IDG4 as a 5 V TTL driver or permit its RS-232 outputs to connect directly to a UART without level translation. Confirm the host UART voltage, logic polarity, baud rate, and RS-232 signal direction. For exposed connectors, add the appropriate overvoltage and surge protection because the specified ±2 kV ESD rating does not replace a complete external protection network.
Decouple the 5 V supply locally and route the return current directly to the device ground pin. Estimated: with a 5 V supply and 8 mA typical operating current, the IC's nominal supply power is approximately 40 mW before charge-pump and load-current effects. Keep the supply decoupling close enough to prevent additional impedance between the capacitor and device, particularly when an attached cable increases transient demand.
규정 준수 정보
The MAX232IDG4 is an industrial-temperature RS-232 interface IC; no automotive qualification is claimed. Use the manufacturer product page and current material-compliance declarations for formal RoHS, REACH, lead-free, halogen-free, and conflict-minerals determinations.