MAX3221ECDBRG4 - 3V-5.5V Single RS-232 Transceiver | TI
부품 번호: MAX3221ECDBRG4 ✓ 활성MAX3221ECDBRG4 개요
An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232-compatible voltage levels and restores incoming RS-232 signals to logic-compatible levels. It belongs to the interface IC hierarchy, where it connects digital logic or microcontrollers to legacy peripheral ports. The MAX3221E family also uses on-chip charge-pump circuitry to generate the bipolar voltage levels required by RS-232 without a separate negative supply.
Key features include operation from 3 V to 5.5 V, one driver and one receiver, ±15 kV human-body-model ESD protection, ±8 kV IEC 61000-4-2 contact discharge protection, and ±15 kV air-gap discharge protection. The device uses four external 0.1 µF charge-pump capacitors. Its 16-SSOP surface-mount package supports compact industrial-control, instrumentation, and embedded equipment layouts.
The MAX3221E architecture provides the electrical interface required by asynchronous serial systems. A single external capacitor at each charge-pump node supports the internal voltage conversion, while the driver presents the bipolar voltage levels expected by an RS-232 port and the receiver converts those levels back to digital logic. This integration simplifies PCB area compared with discrete level-shifting and charge-pump networks.
Typical applications include debug-console connections, industrial serial adapters, point-of-sale equipment, test and measurement instruments, and embedded systems that retain an RS-232 port. For new designs, an RS-232 transceiver is most useful when an existing host or peripheral expects the physical RS-232 interface rather than USB, RS-485, or a proprietary differential link.
Place the four 0.1 µF charge-pump capacitors close to their designated pins and route the driver output and receiver input traces away from sensitive analog or high-speed digital nodes. Confirm the board ground and cable shield arrangement before field deployment because connector-level ESD protection alone does not eliminate conducted noise entering through the cable.
This product record combines the MAX3221ECDBRG4 electrical characteristics, package information, interface ratings, drop-in alternatives, comparison parameters, and practical layout guidance in one engineering-focused reference. It supports component selection, PCB footprint review, and RS-232 interface design without relying on a generic interface-IC overview.
드롭인 대체품: MAX3221ECDBRG4 — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: MAX3221ECDBRG4 (동일 폼 팩터 및 풋프린트) — 차이점: Number of Drivers, Number of Receivers, Package, Product Type.
MAX3221IDBR
✅ 드롭인가격 문의
데이터시트 보기 →MAX3221ECDBR
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
MAX3221ECDBRG4 사양
| Product Type | Single-channel RS-232 line driver and receiver |
| Number of Drivers | 1 driver |
| Number of Receivers | 1 receiver |
| Supply Voltage Range | 3 V to 5.5 V |
| Interface Standard | RS-232; TIA/EIA-232-F compliant |
| Human-Body-Model ESD Protection | ±15 kV |
| IEC 61000-4-2 Contact Discharge | ±8 kV |
| IEC 61000-4-2 Air-Gap Discharge | ±15 kV |
| External Charge-Pump Capacitors | 4 × 0.1 µF |
| 패키지 | 16-SSOP, 5.30 mm width |
| 실장 유형 | Surface mount |
| Packaging | Digi-Reel |
| 동작 온도 | 0 °C to +70 °C |
| Lead-Free Status | Lead-free |
| Green Product Status | Green product |
MAX3221ECDBRG4 16-ssop, 5.30 mm width 핀 구성 가이드
MAX3221ECDBRG4(16-ssop, 5.30 mm width 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: MAX3221ECDBRG4.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
MAX3221ECDBRG4 적합 용도: 6 애플리케이션s: Embedded Debug Console, Industrial Serial Adapter, Point-of-Sale Terminal, Test and Measurement Instrument, Instrumentation Data Link, Legacy Equipment Upgrade.
Embedded Debug Console
The MAX3221ECDBRG4 fits an embedded debug console because it combines one RS-232 driver and one receiver in a compact 16-SSOP package while operating from 3 V to 5.5 V. Connect its logic-side signals to the host UART and its line-side signals to the serial connector through the appropriate protection network. The four 0.1 µF charge-pump capacitors should be placed close to their associated pins. This arrangement preserves a conventional service interface without requiring a negative supply, although the final USB-to-RS-232 adapter used for modern computers may need an additional interface.
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Industrial Serial Adapter
The MAX3221ECDBRG4 is appropriate for a compact industrial serial adapter requiring one legacy RS-232 channel and a 3.3 V or 5 V supply. Its ±15 kV human-body-model, ±8 kV contact-discharge, and ±15 kV air-gap ratings help the line interface withstand cable-borne electrostatic events. Place the four 0.1 µF charge-pump capacitors close to the IC and keep the receive path away from switching nodes. The 0 °C to +70 °C range is suitable for indoor commercial-temperature equipment, but it may not cover wider industrial environments.
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Point-of-Sale Terminal
A point-of-sale terminal can use the MAX3221ECDBRG4 to connect a legacy receipt printer, scanner, or customer-display controller through an RS-232 port. The single-driver, single-receiver arrangement supports one full-duplex serial link and avoids the area cost of a multi-channel transceiver. Operating from 3 V to 5.5 V supports common embedded logic rails, while the four external 0.1 µF capacitors implement the charge-pump function. Designers should confirm the host UART voltage, connector gender, cable length, and whether the peripheral uses hardware handshaking.
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Test and Measurement Instrument
The MAX3221ECDBRG4 can provide the RS-232 control path in test and measurement instruments that retain a serial service or command port. Its 16-SSOP footprint leaves more board area than a multi-channel RS-232 transceiver, while the single channel is sufficient for one command link. The ±15 kV HBM and IEC 61000-4-2 ratings are useful when users connect external cables, but the instrument enclosure, cable shield, and ground-return design remain important parts of the protection strategy.
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Instrumentation Data Link
The MAX3221ECDBRG4 supports a point-to-point RS-232 data link between a controller and an older laboratory instrument. One transmitter can send commands while the receiver handles responses, providing a compact full-duplex connection without a negative power rail. Keep the driver and receiver routes separated from precision analog circuitry and observe the datasheet’s four-capacitor charge-pump layout. Before deployment, verify the instrument’s logic thresholds, baud-rate requirement, and whether RS-232 control lines are required beyond the two primary data paths.
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Legacy Equipment Upgrade
The MAX3221ECDBRG4 is useful when modernizing equipment that retains an RS-232 service connector but needs a compact, low-voltage interface stage. Its 3 V to 5.5 V operation can simplify integration with a 3.3 V controller, and the integrated charge-pump circuitry eliminates the need for a negative supply rail. The 16-SSOP package is larger than a minimal SOT device, so confirm PCB area before layout. A USB-to-RS-232 conversion path may still be required if the modernization project replaces the legacy host port.
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추천 제품 요약
엔지니어링 참조 데이터: MAX3221ECDBRG4 — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | MAX3221IDBR | MAX3221ECDBR |
|---|---|---|---|
| Package | 16-SSOP | 16-SSOP | 16-SSOP |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Device Type | Single-channel RS-232 transceiver | Single-channel RS-232 transceiver | Single-channel RS-232 transceiver |
| Number of Drivers / Receivers | 1 / 1 | 1 / 1 | 1 / 1 |
| Supply Voltage | 3 V to 5.5 V | 3 V to 5.5 V | 3 V to 5.5 V |
| ESD Protection | ±15 kV HBM; ±8 kV contact; ±15 kV air-gap | ±15 kV ESD protection | ±15 kV ESD protection |
| Interface Compliance | TIA/EIA-232-F | TIA/EIA-232-F | TIA/EIA-232-F |
| Mounting Type | Surface mount | Surface mount | Surface mount |
주요 차별점
- Single-channel integration limits board area versus multi-channel transceivers (vs MC3486NSR)
- ESD ratings are specified across three test methods (vs MAX3221IDBR)
- Operates directly from common low-voltage logic rails (vs MAX3221ECDBR)
설계 노트
Place all four 0.1 µF charge-pump capacitors adjacent to their designated MAX3221ECDBRG4 pins, with the shortest possible ground and capacitor connections. Keep the capacitor loops compact because the charge-pump nodes switch at high frequency and larger loops can radiate noise. Follow the manufacturer’s typical layout artwork for component spacing and ground-return geometry rather than treating the capacitors as generic bulk decoupling.
Route the RS-232 driver-output and receiver-input nets directly toward the connector while separating them from clocks, switching regulators, and sensitive analog inputs. The driver can transition between positive and negative RS-232 levels, so long parallel runs with digital signals may increase coupling. A solid ground plane beneath the interface section is preferable to a fragmented return path, while high-current return paths should not pass beneath the line-side circuitry.
Do not assume the IC’s ±15 kV ESD rating eliminates the need for a correctly designed cable and connector path. Confirm that the connector shield connects to the intended chassis or earth reference, specify a suitable cable, and evaluate whether additional protection is required for the full system. Also verify the 0 °C to +70 °C commercial operating range before using the device in extended-temperature equipment.
규정 준수 정보
The component is described as a lead-free green product. RoHS, REACH, halogen-free, and conflict-minerals status require confirmation from the manufacturer’s current product documentation.
