MAX3232CPWR - 250kbps Dual RS-232 Transceiver | TI
N.º de pieza: MAX3232CPWR ✓ Activo| Cant. | Precio unitario | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
MAX3232CPWR Descripción general
An RS-232 transceiver is an interface IC that translates low-voltage digital logic signals into differential bipolar voltage levels used by RS-232 equipment. The MAX3232CPWR is designed for asynchronous serial communication and uses external capacitors for its charge-pump voltage conversion, avoiding an external power supply while supporting 3 V, 3.3 V, and 5 V systems. Its dual-channel architecture suits equipment with two serial ports, point-to-point links, industrial controllers, and embedded systems requiring robust line-side protection.
Key features include 250 kbit/s operation, two drivers, two receivers, low typical supply current of 300 µA, 5-V logic compatibility, and ±15-kV ESD protection. The MAX3232 family meets or exceeds TIA/EIA-232-F and ITU V.28 requirements, as stated in the manufacturer datasheet. The PW package supports compact PCB layouts, while the device’s low-voltage supply range makes it suitable for modern embedded systems.
The dual charge-pump architecture generates the positive and negative voltage levels required by RS-232 drivers. External capacitors are connected to the charge-pump pins, and the supply decoupling network should follow the datasheet layout. The MAX3232CPWR is a practical choice where a system needs two RS-232 channels without a separate negative power rail.
Typical uses include industrial control equipment, data acquisition systems, test and measurement instruments, USB-to-RS-232 adapters, point-of-sale terminals, and embedded serial bridges. The device is also appropriate for systems requiring robust protection when the cable may be exposed to electrostatic discharge events.
When laying out a MAX3232CPWR circuit, place charge-pump capacitors and supply decoupling capacitors close to their associated pins, keep the RS-232 traces away from sensitive analog or high-speed digital paths, and verify the external capacitor values against the manufacturer datasheet. The ±15-kV ESD rating does not eliminate the need for good connector protection and cable routing.
This page combines verified manufacturer specifications, pricing context, cross-reference alternatives, application guidance, and practical PCB recommendations for engineers evaluating the MAX3232CPWR.
Alternativas directas para MAX3232CPWR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MAX3232EIPWR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX3232ECPW
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX3232EIPWRQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SP3232EBCY-L/TR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ST3232BTR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MAX3232CPWR Especificaciones
| Product Type | Dual RS-232 line driver/receiver transceiver |
| Supply Voltage Range | 3 V to 5.5 V |
| Maximum Data Rate | 250 kbit/s |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| ESD Protection | ±15 kV |
| Typical Supply Current | 300 µA |
| External Charge-Pump Capacitors | 0.1 µF |
| Logic Compatibility | Accepts 5-V logic |
| Standards Compliance | Meets or exceeds TIA/EIA-232-F and ITU V.28 requirements |
| Encapsulado | 16-pin TSSOP (PW) |
| Tipo de montaje | Surface mount |
| Tipo de interfaz | RS-232 |
| Channel Configuration | 2/2 full RS-232 transceiver |
| Operating Supply | Single 3 V to 5.5 V supply |
| Protection Scope | RS-232 line-driver and receiver terminals, including ground |
| Manufacturer | Texas Instruments |
Guía de configuración de pines de MAX3232CPWR 16-pin tssop (pw)
Configuración de pines para MAX3232CPWR (encapsulado 16-pin tssop (pw)). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para MAX3232CPWR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MAX3232CPWR es adecuado para 8 aplicacións: Industrial Control Equipment, USB-to-RS-232 Adapters, Data Acquisition Systems, Point-of-Sale Terminals, Embedded Serial Bridges, Embedded Linux Serial Console, Test and Measurement Instruments, RS-232 Cable Protection.
Industrial Control Equipment
The MAX3232CPWR fits industrial controllers that need to connect a 3.3 V or 5 V microcontroller to two external RS-232 ports. Its 3 V to 5.5 V supply range eliminates the need for a separate negative supply, while the dual charge-pump design supports the positive and negative voltage levels required by RS-232. With two drivers and two receivers, the device can serve two point-to-point links or provide multiple signal paths in a compact controller. The 250 kbit/s maximum data rate is suitable for many configuration, logging, and service interfaces. Place the 0.1 µF charge-pump capacitors close to the device and route RS-232 traces away from sensitive control circuitry.
Recomendado
USB-to-RS-232 Adapters
The MAX3232CPWR is useful in USB-to-RS-232 adapters because it converts a host controller’s low-voltage UART signals into compliant RS-232 levels while operating from a compact single supply. The 3 V to 5.5 V range accommodates USB controllers and embedded bridges, and the two-channel arrangement allows a product to expose more than one serial connector. Its ±15-kV ESD protection adds useful robustness when an adapter is connected to an external cable. The 250 kbit/s rate accommodates many legacy serial devices, configuration consoles, and industrial peripherals. Verify connector pinouts and cable direction because RS-232 is point-to-point rather than a multi-drop bus.
Recomendado
Data Acquisition Systems
Data acquisition and test systems often need reliable RS-232 links between a controller and external instruments. The MAX3232CPWR provides two driver and receiver channels, a 3 V to 5.5 V operating range, and 250 kbit/s throughput for command, status, and measurement data. Its low typical supply current of 300 µA helps reduce auxiliary power consumption in distributed equipment. The ±15-kV ESD rating helps protect the interface when test leads are connected or disconnected frequently, although cable and connector protection still matter. Use short, controlled RS-232 traces, maintain ground continuity, and verify the charge-pump capacitor placement to minimize noise and startup issues.
Recomendado
Point-of-Sale Terminals
The MAX3232CPWR can support legacy RS-232 peripherals in point-of-sale terminals, including receipt printers, scales, scanners, and service consoles. Its dual-channel format allows one controller to manage two independent serial links while operating from a low-voltage system rail. The 250 kbit/s maximum data rate is appropriate for many short-distance point-to-point peripherals, and the 3 V to 5.5 V range supports embedded Linux or microcontroller platforms. ESD protection improves robustness when service technicians connect external equipment. Designers should confirm logic levels, cable length, connector assignments, and driver direction before deployment, especially when using legacy equipment with nonstandard RS-232 implementations.
Recomendado
Embedded Serial Bridges
The MAX3232CPWR is appropriate for embedded serial bridges that translate between a modern MCU or SoC and older RS-232 equipment. Its two drivers and two receivers provide flexibility for concurrent communication paths, while the single 3 V to 5.5 V supply simplifies power architecture. The device’s 300 µA typical supply current is beneficial in low-power embedded systems, although final current depends on channel activity and operating conditions. The 250 kbit/s limit should be checked against the bridge’s protocol timing. Place bypass and charge-pump capacitors according to the datasheet, and isolate long external cables when electrical-noise or ground-loop concerns are important.
Recomendado
Embedded Linux Serial Console
The MAX3232CPWR can provide RS-232 connectivity for an embedded Linux console when the processor lacks a legacy UART electrical interface. Its 3 V to 5.5 V operation supports common embedded rails, and the two-channel arrangement can serve a debug console plus an auxiliary serial link. The 250 kbit/s maximum rate is suitable for console traffic, boot messages, and device-management commands. The device’s ±15-kV ESD protection is valuable in chassis-mounted equipment where users may connect external cables. Designers should define TX/RX direction correctly, maintain a common ground within the RS-232 domain, and verify the 0.1 µF charge-pump capacitors and supply bypass layout.
Recomendado
Test and Measurement Instruments
The MAX3232CPWR is suitable for test and measurement instruments that expose a service port, remote-control interface, or calibration connection. Two RS-232 channels provide flexibility for simultaneous control and diagnostic links, and the 250 kbit/s rate supports many legacy instrument protocols. The device operates from 3 V to 5.5 V, which helps integrate it into compact instruments powered by low-voltage rails. Its ±15-kV ESD protection improves resilience during repeated cable connections, though proper shielding and connector construction remain important. Follow the datasheet’s recommended charge-pump capacitor and bypass layout, and keep the bipolar RS-232 traces isolated from high-impedance analog front ends.
Recomendado
RS-232 Cable Protection
The MAX3232CPWR is appropriate for cable-facing RS-232 ports where electrostatic discharge is a concern. Its ±15-kV protection specification targets the serial-port line terminals, including ground, and can improve system robustness compared with an unprotected logic-level connector. The device still requires correct cable routing, connector grounding, and—in higher-risk installations—external surge or protection networks. A two-channel implementation can protect or serve two external ports without duplicating the charge-pump supply architecture. Designers should verify the exact protection test conditions in the official datasheet and avoid assuming that the internal ESD structure replaces industrial surge suppression.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MAX3232CPWR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | MAX3232EIPWR | MAX3232ECPW | MAX3232EIPWRQ1 | SP3232EBCY-L/TR | ST3232BTR |
|---|---|---|---|---|---|---|
| Package | TSSOP-16 (PW) | TSSOP-16 (PW) | TSSOP-16 (PW) | TSSOP-16 (PW) | TSSOP-16 (PW) | TSSOP-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | MaxLinear | STMicroelectronics |
| Interface | Dual RS-232 line driver/receiver | MAX3232-family RS-232 transceiver | MAX3232-family RS-232 transceiver | MAX3232-family RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
Diferenciadores clave
- Direct MAX3232-family replacement path (frente a MAX3232ECPW)
- Cross-brand sourcing option (frente a SP3232EBCY-L/TR)
- Low-voltage integrated interface (frente a MAX3232CPWR)
Notas de diseño
The MAX3232CPWR uses external charge-pump capacitors to generate the bipolar voltages required by the RS-232 drivers. Place the specified 0.1 µF capacitors close to the associated pins and provide normal supply decoupling near the device. Keep the charge-pump loop compact, use a continuous ground reference, and follow the official MAX3232 layout guidance because long or high-impedance traces can degrade startup and line-level performance.
Keep the RS-232 driver outputs and receiver inputs away from sensitive analog nodes, clock lines, and high-speed digital buses. Route the external charge-pump capacitors and bypass capacitor with short traces, and maintain a stable ground plane beneath the device. When the connector is physically distant from the IC, route the differential RS-232 pair together and avoid sharing wide ground-current paths with unrelated analog circuitry.
Do not assume that every MAX3232-family marking is a guaranteed drop-in replacement. Confirm the exact PW package dimensions, pin numbering, supply range, channel direction, external-capacitor connections, ESD test conditions, and temperature or automotive requirements. Also confirm RS-232 signal direction and connector pin assignments; an RS-232 link is commonly point-to-point, and swapping TX and RX prevents communication even when the transceiver operates correctly.
The MAX3232CPWR is a linear-interface transceiver with internal charge-pump conversion, so the PCB still determines how cleanly the RS-232 port behaves. Use a solid ground plane, minimize loop area around charge-pump components, and separate the cable-side connector region from precision analog circuitry. If the port is exposed to severe industrial transients, add appropriately rated external protection and verify the system-level isolation strategy rather than relying only on the IC’s ±15-kV ESD rating.
Información de cumplimiento
The supplied verified data identifies TIA/EIA-232-F and ITU V.28 compatibility, but does not provide RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. Verify current compliance documents with Texas Instruments before procurement.
