MAX3232CUE+ - 2/2 RS-232 Transceiver, 3.0-5.5V | Maxim Integrated
MPN: MAX3232CUE+ ✓ Hoạt độngMAX3232CUE+ Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho MAX3232CUE+ — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MAX3232CUE+ (cùng hình factor và footprint) — khác nhau ở Device Type, Maximum Data Rate, Operating Temperature Range, Package, Supply Voltage Range.
MAX3232CSE+
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MAX3232AEE+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX3232CAE+
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MAX3232EE+
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MAX3232CUE+ Thông số kỹ thuật
| 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 |
| Khoảng nhiệt độ hoạt động | 0 °C to 70 °C |
| Hộp | 16-pin TSSOP |
| Kiểu lắp đặt | Surface mount |
| Lead-Free Status | Lead-free |
| AEC-Q100 Qualification | Not applicable |
| Producer Output Count | 2 channels |
| Receiver Output Count | 2 channels |
Cấu hình chân MAX3232CUE+
| Chân 1 | R1OUT — Receiver 1 output |
| Chân 2 | R1IN — Receiver 1 input |
| Chân 3 | R2IN — Receiver 2 input |
| Chân 4 | R2OUT — Receiver 2 output |
| Chân 5 | TIN1 — Driver 1 logic input |
| Chân 6 | TOUT1 — Driver 1 RS-232 output |
| Chân 7 | TIN2 — Driver 2 logic input |
| Chân 8 | TOUT2 — Driver 2 RS-232 output |
| Chân 9 | GND — Ground |
| Chân 10 | VCC — Positive supply input |
| Chân 11 | V+ — Charge-pump positive output |
| Chân 12 | C2+ — Charge-pump capacitor 2 positive terminal |
| Chân 13 | C2- — Charge-pump capacitor 2 negative terminal |
| Chân 14 | V- — Charge-pump negative output |
| Chân 15 | C1+ — Charge-pump capacitor 1 positive terminal |
| Chân 16 | C1- — Charge-pump capacitor 1 negative terminal |
Ứng dụng tiêu biểu
MAX3232CUE+ phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MAX3232CUE+ — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Exact C-grade family ordering option (vsMAX3232CSE+)
- Same-family alternative with matching 1 Mbps capability (vsMAX3232AEE+)
- Single-supply true RS-232 operation (vsMAX3232CAE+)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.