MAX232CPE-C70055 - RS-232 Transceiver | Analog Devices
MPN： MAX232CPE-C70055 ✓ 啟用中MAX232CPE-C70055 概覽
The MAX232 family belongs to the interface-IC hierarchy: RS-232 transceiver -> line driver and receiver -> logic interface IC -> semiconductor. A MAX232-type device uses an on-chip charge-pump voltage converter to generate the positive and negative voltages required by RS-232 drivers. This allows a circuit powered from a single positive supply to communicate with equipment using RS-232 signal levels. The device is intended for applications where traditional RS-232 communication is required but higher-speed differential or differential alternatives are not appropriate.
The C70055 ordering suffix identifies a specific manufacturer-specified configuration associated with the MAX232CPE family. The verified product information identifies the device as a dual-driver, dual-receiver RS-232 interface IC in a 16-pin PDIP package. The standard MAX232CPE family is described as an EIA/TIA-232E and V.28/V.24-compatible interface for systems where positive and negative supply rails are unavailable. Key engineering considerations include the external charge-pump capacitor values, supply bypass, unused-line handling, and the difference between logic-level and RS-232-level signals.
Typical uses include industrial control equipment, data acquisition systems, service interfaces, test fixtures, serial adapters, and embedded equipment that needs a conventional RS-232 port. The MAX232 is most appropriate when the system uses a UART with TTL logic and requires a legacy RS-232 connector. It is not the right choice when the design needs galvanic isolation, very high data rates, long unrepeated cable distances, or modern USB-to-serial conversion.
A practical design should follow the manufacturer's application circuit, including the specified charge-pump capacitors, local supply decoupling, and controlled handling of unused receiver and driver outputs. PCB placement should keep the charge-pump loop compact and connect the connector-side return path carefully to reduce noise pickup. For a new design, verify the exact C70055 ordering code, electrical limits, and package drawings against the current Analog Devices or Maxim Integrated documentation before releasing the PCB.
直接替換替代品，適用於 MAX232CPE-C70055 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MAX232CPE-C70055 （相同外形與佔位） — 差異在於 Interface Standard, Product Type, Package, ESD Protection, External Charge-Pump Capacitors.
MAX232CPE+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX232EPE
✅ 直接替換聯絡詢價
查看資料表 →MAX232N
✅ 直接替換聯絡詢價
查看資料表 →MAX202EPE+
✅ 直接替換聯絡詢價
查看資料表 →MAX230CPP+
✅ 直接替換📋 參考替代品（不在目錄中）
MAX232CPE-C70055 規格
| Product Type | Dual RS-232 transceiver with integrated charge-pump converter |
| Number of Driver Channels | 2 channels |
| Number of Receiver Channels | 2 channels |
| Interface Standard | EIA/TIA-232E, V.28, and V.24 |
| Input Logic Levels | TTL/CMOS-compatible UART interface |
| 封裝 | 16-pin PDIP |
| 安裝類型 | Through-hole |
MAX232CPE-C70055 16-pin pdip 腳位配置指南
MAX232CPE-C70055（16-pin pdip 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： MAX232CPE-C70055.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX232CPE-C70055 適用於 6 應用s: Industrial RS-232 Control Port, Data Acquisition Equipment, Test and Measurement Fixture, Embedded Serial Adapter, Serial Communication Adapter, Legacy Equipment Service Interface.
Industrial RS-232 Control Port
MAX232CPE-C70055 fits an industrial controller that exposes a conventional RS-232 service or command port. The two driver channels and two receiver channels allow a UART-equipped controller to communicate with equipment using bipolar RS-232 levels without adding a separate level converter. Its 16-pin PDIP format is particularly useful for legacy controller boards that were designed around a through-hole MAX232 footprint. The design must follow the manufacturer charge-pump and bypass-capacitor layout, while the connector interface should include suitable surge and ground-return protection.
推薦
Data Acquisition Equipment
MAX232CPE-C70055 can provide the host-side RS-232 connection for data acquisition instruments that receive commands and return measurements. The UART logic side remains at ordinary digital levels, while the transceiver converts the signals to RS-232 voltage levels at the cable interface. Two driver and two receiver channels support bidirectional communication when the instrument needs both command transmission and status reporting. Keep the charge-pump loop compact, provide local supply decoupling, and use a stable connector ground reference to reduce measurement-system noise pickup.
推薦
Test and Measurement Fixture
A MAX232CPE-C70055 interface is useful in test fixtures and legacy service equipment where a PC or controller must communicate through RS-232. The integrated charge pump allows the fixture to operate from one positive supply while producing the positive and negative voltage levels expected by RS-232 drivers. This reduces external circuitry and board area compared with a discrete level-shifting arrangement. Because the package is a 16-pin PDIP, the device also suits through-hole prototype boards, fixture interconnects, and products where production volume does not justify a fine-pitch redesign.
推薦
Embedded Serial Adapter
MAX232CPE-C70055 can serve as the RS-232 physical layer beside a microcontroller, embedded processor, or programmable controller. The host UART connects to the logic-side pins, and the transceiver handles the electrical conversion to the RS-232 port. This arrangement is useful for configuration tools, firmware update ports, and equipment with legacy host software. Software should configure the UART baud rate and framing to match the connected peer, while the hardware design should reserve connector protection and test access for production troubleshooting.
推薦
Serial Communication Adapter
MAX232CPE-C70055 is appropriate for a small RS-232 adapter that converts a TTL or CMOS UART connector into a legacy computer or instrument port. The through-hole PDIP package is easy to prototype and repair, while the integrated charge pump reduces the number of external power components. Because RS-232 is point-to-point, the adapter should expose the appropriate driver and receiver connections for each supported direction and avoid presenting multiple active drivers on one bus. Connector shields, chassis grounding, and transient protection should follow the target installation environment.
推薦
Legacy Equipment Service Interface
MAX232CPE-C70055 supports maintenance and diagnostic access on legacy equipment that uses RS-232 for service consoles. A technician's terminal can connect through the transceiver while the equipment controller remains on TTL/CMOS logic, allowing command exchange without changing the original bus architecture. Through-hole construction is advantageous in service-oriented products where field replacement and mechanical compatibility are priorities. The finished interface should include a clearly labeled connector, protected cable entry, and software-controlled handshake behavior to prevent unintended commands during maintenance.
推薦
推薦產品摘要
工程參考資料，適用於 MAX232CPE-C70055 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MAX232CPE+ | MAX232EPE | MAX232N | MAX202E | MAX230CPP+ |
|---|---|---|---|---|---|---|
| Package | PDIP-16 | PDIP-16 - same | PDIP-16 - same | PDIP-16 - same | PDIP-16 - same | PDIP-16 - same |
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Device Type | Dual RS-232 transceiver | Dual RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver | RS-232 transceiver |
主要差異化特點
- C70055 ordering configuration within the established MAX232CPE family (對比MAX232CPE+)
- No charge-pump capacitor redesign required for the standard MAX232 architecture (對比MAX202E)
- Dual-driver and dual-receiver RS-232 interface in a through-hole package (對比MAX230CPP+)
- Same package class as the principal documented through-hole replacements (對比MAX232N)
設計說明
Follow the manufacturer MAX232 application circuit for the charge-pump capacitors and place the capacitor connections close to the corresponding device pins. Keep the charge-pump loop compact because long traces can increase radiated noise and coupling into sensitive analog sections. Use a short ground-return path and place the supply bypass capacitor near the IC power pins rather than at the connector or system regulator.
Do not substitute MAX202E without reviewing the capacitor values: manufacturer guidance states that MAX202E uses 0.1 uF charge-pump capacitors, whereas MAX232 uses 1 uF. A footprint-compatible part can still require component-value changes. Likewise, confirm the numbered pinout, operating-temperature grade, and C70055 ordering requirements before treating another MAX232-family suffix as a drop-in replacement.
Add appropriate transient and surge protection at an exposed RS-232 connector because the transceiver is intended for cable-connected equipment. Keep protection-device routing away from the charge-pump and receiver paths, and terminate unused inputs according to the manufacturer guidance. Use a properly referenced connector ground and shield arrangement to reduce common-mode noise and prevent surge current from entering the logic-side circuitry.
Configure the UART baud rate, data bits, parity, and stop bits consistently on both connected devices, and avoid relying on RS-232 for multipoint buses. RS-232 is intended for point-to-point communication, so only one active driver should drive a given signal line. If the cable is long or crosses industrial noise sources, validate the complete interface rather than assuming the logic-side UART timing alone guarantees reliable reception.
合規資訊
The available product excerpts do not state the required compliance status for the C70055 ordering code.