MAX3232CUE+ - 2/2 RS-232 Transceiver, 3.0-5.5V | Maxim Integrated
MPN: MAX3232CUE+ ✓ نشطMAX3232CUE+ نظرة عامة
A true RS-232 transceiver is an interface IC that converts logic-level signals between TTL or CMOS equipment and the voltage-defined RS-232 serial bus. In the signal path hierarchy, it belongs to the RS-232 interface family, which sits between computer serial ports, embedded controllers, industrial equipment, and communications cables. The MAX3232CUE+ supports both transmit and receive paths, making it suitable for bidirectional point-to-point serial links.
The principal operating specifications are a 3.0 V to 5.5 V supply range, a maximum data rate of 1 Mbps, and a 16-TSSOP package. The transmitter design includes a low-dropout output stage, while the dual charge-pump circuit supports true RS-232 operation from a single supply. Only four external 0.1 µF charge-pump capacitors are required, simplifying implementation on compact boards.
The MAX3232CUE+ is a 2/2 transceiver, meaning it provides two transmit channels and two receive channels. It is intended for low-power, low-voltage systems where traditional RS-232 transceivers would require a higher supply. Its electrical interface is suited to controller UARTs, test equipment, point-of-sale terminals, industrial control panels, and other equipment using serial command or data links.
The E temperature designation indicates a 0 °C to 70 °C commercial operating range. The TSSOP package supports surface-mount assembly and is appropriate for compact embedded and industrial-control products. Compared with discrete TTL-to-RS-232 designs, the integrated transceiver also reduces board area and simplifies charge-pump implementation.
Design the charge-pump capacitors close to the IC, route transceiver outputs away from sensitive analog signals, and use the manufacturer's pin-description table when assigning PCB tracks. Confirm the exact cable length, ground reference, baud rate, and electrical limits for the target RS-232 port before releasing the production design.
This page combines the manufacturer specifications with package, sourcing, application, and replacement guidance. It highlights the MAX3232CUE+ operating envelope, explains its charge-pump implementation, and provides drop-in candidates that require careful electrical and pinout verification before substitution.
بدائل مباشرة لـ MAX3232CUE+ — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MAX3232CUE+ (نفس عامل الشكل والبصمة) — يختلف في Device Type, Maximum Data Rate, Operating Temperature Range, Package, Supply Voltage Range.
MAX3232CSE+
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←MAX3232AEE+
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MAX3232CAE+
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منهاتواصل لمعرفة السعر
عرض ورقة البيانات ←MAX3232EE+
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MAX3232CUE+ المواصفات
| Device Type | 2/2 RS-232 transceiver |
| Supply Voltage Range | 3.0 V to 5.5 V |
| Maximum Data Rate | 1 Mbps |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Logic Compatibility | TTL/CMOS |
| Charge Pump | Dual |
| External Charge-Pump Capacitors | 4 capacitors, 0.1 µF each |
| نطاق درجة حرارة التشغيل | 0 °C to 70 °C |
| العلبة | 16-pin TSSOP |
| نوع التركيب | Surface mount |
| Lead-Free Status | Lead-free |
| AEC-Q100 Qualification | Not applicable |
| Producer Output Count | 2 channels |
| Receiver Output Count | 2 channels |
تكوين أطراف MAX3232CUE+
| دبوس 1 | R1OUT — Receiver 1 output |
| دبوس 2 | R1IN — Receiver 1 input |
| دبوس 3 | R2IN — Receiver 2 input |
| دبوس 4 | R2OUT — Receiver 2 output |
| دبوس 5 | TIN1 — Driver 1 logic input |
| دبوس 6 | TOUT1 — Driver 1 RS-232 output |
| دبوس 7 | TIN2 — Driver 2 logic input |
| دبوس 8 | TOUT2 — Driver 2 RS-232 output |
| دبوس 9 | GND — Ground |
| دبوس 10 | VCC — Positive supply input |
| دبوس 11 | V+ — Charge-pump positive output |
| دبوس 12 | C2+ — Charge-pump capacitor 2 positive terminal |
| دبوس 13 | C2- — Charge-pump capacitor 2 negative terminal |
| دبوس 14 | V- — Charge-pump negative output |
| دبوس 15 | C1+ — Charge-pump capacitor 1 positive terminal |
| دبوس 16 | C1- — Charge-pump capacitor 1 negative terminal |
التطبيقات النموذجية
MAX3232CUE+ مناسب لـ 6 التطبيقs: Embedded Controller Serial Console, Industrial Control Panel, Point-of-Sale Terminal, Test and Measurement Instrument, USB-to-RS-232 Adapter, Telemetry and Remote-Control Link.
Embedded Controller Serial Console
The MAX3232CUE+ fits an embedded controller that exposes a maintenance or configuration port through a DB9-style RS-232 connector. Its 3.0 V to 5.5 V supply range allows operation from the same low-voltage rail used by many microcontrollers, while the 2/2 architecture supports bidirectional command and diagnostic traffic. The low-dropout transmitter stage and dual charge pump provide true RS-232 levels without a separate negative supply. Four external 0.1 µF capacitors implement the charge-pump function, so the principal layout task is keeping each capacitor short and close to its associated pin.
موصى به
Industrial Control Panel
The MAX3232CUE+ is suitable for industrial control equipment that communicates with operators, test fixtures, or programmable instruments over RS-232. Its 1 Mbps maximum rate supports high-speed legacy serial links, while the two-driver and two-receiver arrangement handles bidirectional control and status traffic. Operating from 3.0 V to 5.5 V simplifies integration with modern controller platforms, although the 0 °C to 70 °C commercial grade must remain within the enclosure's environmental limits. The 16-pin TSSOP package also saves board area compared with larger legacy RS-232 packages.
موصى به
Point-of-Sale Terminal
A point-of-sale terminal can use the MAX3232CUE+ to bridge a low-voltage UART to a legacy RS-232 peripheral such as a printer, reader, or customer display. The single-supply charge-pump design reduces the need for a separate RS-232 power rail, and the low-dropout transmitter stage preserves true RS-232 operation from a 3.3 V supply. The 1 Mbps capability provides ample margin for typical peripheral traffic rates. Keep the unprotected RS-232 traces away from audio, sensor, and precision analog paths to minimize coupled noise.
موصى به
Test and Measurement Instrument
The MAX3232CUE+ is appropriate for laboratory and production-test equipment that uses RS-232 for instrument control or data capture. Its two transmit and two receive channels can carry commands and responses over a single multidrop-compatible interface arrangement, while the 1 Mbps rate supports automated test systems. Running from 3.0 V to 5.5 V permits use beside low-voltage control logic, and the four required 0.1 µF capacitors keep the external charge-pump network compact. Verify grounding and cable length because RS-232 communication reliability depends on the complete signal path, not only the transceiver.
موصى به
USB-to-RS-232 Adapter
The MAX3232CUE+ can provide the legacy RS-232 side of a USB-to-serial adapter when the host controller exposes a UART. The 2/2 interface supports both transmit and receive paths, and its 3.0 V to 5.5 V range can follow the adapter controller's supply. The 16-pin TSSOP package is useful for compact dongles, while the 1 Mbps capability covers common serial-device speeds. A robust product should include the required charge-pump capacitors, ESD protection, connector shield grounding, and software control for modem-control signals where the application requires them.
موصى به
Telemetry and Remote-Control Link
The MAX3232CUE+ can interface a compact telemetry or remote-control unit with a legacy RS-232 master. The transceiver's low-voltage supply operation simplifies use in battery- and USB-powered portable equipment, while the 2/2 channels permit command transmission and status reception. The maximum 1 Mbps data rate covers legacy telemetry links, and the 16-pin TSSOP package limits board area. Because the E-grade operating range is 0 °C to 70 °C, outdoor or extended-temperature deployments require environmental protection or a wider-temperature grade rather than direct substitution.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MAX3232CUE+ — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | MAX3232CSE+ | MAX3232AEE+ | MAX3232CAE+ | MAX3232EE+ |
|---|---|---|---|---|---|
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated | Maxim Integrated |
| Package | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP | 16-pin TSSOP |
| Device Type | 2/2 RS-232 transceiver | 2/2 RS-232 transceiver | 2/2 RS-232 transceiver | 2/2 RS-232 transceiver | 2/2 RS-232 transceiver |
| Supply Voltage Range | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Maximum Data Rate | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps | 1 Mbps |
| External Charge-Pump Capacitors | 4 capacitors, 0.1 µF each | 4 capacitors, 0.1 µF each | 4 capacitors, 0.1 µF each | 4 capacitors, 0.1 µF each | 4 capacitors, 0.1 µF each |
| Operating Temperature Range | 0 °C to 70 °C | 0 °C to 70 °C | 0 °C to 70 °C | 0 °C to 70 °C | 0 °C to 70 °C |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
أبرز الفروقات
- Exact C-grade family ordering option (مقابلMAX3232CSE+)
- Same-family alternative with matching 1 Mbps capability (مقابلMAX3232AEE+)
- Single-supply true RS-232 operation (مقابلMAX3232CAE+)
ملاحظات التصميم
Place all four 0.1 µF charge-pump capacitors directly between their corresponding C1 and C2 terminals and the charge-pump pins. Keep these loops short, with a low-impedance ground return and no intervening test pads where practical. Short charge-pump loops reduce radiated and conducted coupling that could appear on the RS-232 output or disturb nearby logic.
Route TOUT1 and TOUT2 away from receiver inputs, clocks, sensors, and analog traces. RS-232 outputs can contain fast edges even when the data rate is modest, so maintain reasonable spacing and use a continuous ground reference. Place any connector-side protection close to the connector and verify that its capacitance does not distort the intended baud rate.
Do not treat a shared package and identical 2/2 channel count as sufficient proof of interchangeability. MAX3232 family suffixes can represent different electrical grades, and some related parts may alter shutdown, receiver enable, or charge-pump behavior. Compare every pin, supply range, data rate, and driver load before approving MAX3232CSE+, MAX3232AEE+, MAX3232CAE+, or MAX3232EE+ as a substitution.
Place local supply decoupling at VCC and provide a low-resistance connection to the ground pin. Route supply current separately from sensitive input paths where the board layout permits. The MAX3232CUE+ accepts a 3.0 V to 5.5 V supply, but the selected regulator should maintain that range across temperature and load rather than relying on a nominal 3.3 V or 5 V value.
معلومات الامتثال
The ordering information identifies MAX3232CUE+ as a lead-free part. RoHS, REACH, halogen-free, and conflict-minerals statements require confirmation from the current manufacturer product or material declaration.