MAX202CDE4 - 5V Dual RS-232 Transceiver | Texas Instruments
MPN： MAX202CDE4 ✓ 啟用中MAX202CDE4 概覽
An RS-232 transceiver is an interface IC that converts logic-level signals into RS-232 line levels and converts received line-level signals back into logic-compatible levels. Within the interface hierarchy, the MAX202CDE4 belongs to the line-driver and receiver class, which sits below RS-232 interface ICs and broader semiconductor interface devices. Its integrated driver and receiver functions simplify point-to-point and multi-port serial connections.
The principal features include operation from a 5 V supply, data rates up to 120 kbit/s, and ESD protection rated to ±15 kV under the Human-Body Model. The bus pins meet or exceed TIA/EIA-232-F and ITU V.28 requirements. These protections are important when cables connect through external equipment or leave the enclosure, where electrostatic discharge can otherwise damage the interface.
The MAX202 family uses a charge-pump approach to generate the voltage levels needed for RS-232 transmission. Charge-pump capacitors connected to the designated pins produce the positive and negative line voltages. The specified external 0.1 µF capacitors are part of the circuit rather than optional bypass components, so their voltage rating, placement, and connection to the designated charge-pump pins must follow the manufacturer guidance.
Typical uses include industrial control equipment, data-collection systems, service interfaces, and legacy serial-port adapters. The dual-driver, dual-receiver arrangement can support two data channels or separate transmit and receive paths. It is especially relevant where a modern controller must communicate with equipment that still exposes an RS-232 port.
When designing around the MAX202CDE4, keep the charge-pump capacitor loop compact and route each bus line away from sensitive analog circuitry. Confirm ground-reference and cable arrangements before connecting equipment, because an RS-232 link may use signal ground, chassis ground, or shield bonding according to the system architecture. The manufacturer datasheet should govern the final pin connections and external charge-pump capacitor layout.
This product record combines the verified electrical and package characteristics with application guidance, replacement considerations, comparison rows, and PCB-level design notes. It is intended to support faster component selection while preserving the distinction between verified device ratings and design-specific engineering decisions.
直接替換替代品，適用於 MAX202CDE4 — 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： MAX202CDE4 （相同外形與佔位） — 差異在於 Supply Voltage, Mounting Type, Package, Interface Standard, Maximum Data Rate.
MAX202CPE+
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MAX202CSE+
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MAX202EPE+
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MAX202ESE+
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MAX202CPE+
✅ 直接替換聯絡詢價
查看資料表 →MAX202CDE4 規格
| Product Type | Dual RS-232 line driver/receiver |
| 供應電壓 | 5 V |
| Maximum Data Rate | 120 kbit/s |
| ESD Protection | ±15 kV, Human-Body Model |
| Number of Transmitters | 2 |
| Number of Receivers | 2 |
| External Charge-Pump Capacitor | 0.1 µF |
| Interface Standard | TIA/EIA-232-F |
| Interface Standard | ITU V.28 |
| 封裝 | 16-pin SOIC |
| Package Code | SOP |
| Package Shape | Rectangular |
| Lead Form | Gull wing |
| Terminal Count | 16 |
| 工作溫度 | 0 °C to 70 °C |
| Temperature Grade | Commercial |
| 安裝類型 | Surface mount |
MAX202CDE4 rectangular 腳位配置指南
MAX202CDE4（rectangular 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： MAX202CDE4.
請參閱 資料表 以查看完整腳位配置。
典型應用
MAX202CDE4 適用於 6 應用s: Industrial Control Console, Legacy Data Acquisition, Serial Service Port, Instrument Communication Interface, Point-to-Point Data Link, Embedded Equipment Communication.
Industrial Control Console
The MAX202CDE4 fits industrial control consoles that need two RS-232 channels for configuration, diagnostic, or legacy equipment interfaces. Its two transmitters and two receivers can support separate data paths, while the 120 kbit/s maximum rate covers typical command and telemetry traffic. The 5 V supply aligns with many embedded controller rails. The ±15 kV Human-Body-Model bus protection adds useful ruggedness when a serial cable connects to externally accessible equipment, although the design must still provide proper grounding and route the bus away from sensitive circuitry.
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Legacy Data Acquisition
MAX202CDE4 is appropriate for data-acquisition equipment that communicates with older RS-232 instruments or laboratory controllers. The dual-driver, dual-receiver arrangement can connect two instrument channels without using separate interface packages. At a maximum of 120 kbit/s, the device addresses conventional RS-232 command and measurement-data links. Its 16-pin SOIC package simplifies board integration, but the external 0.1 µF charge-pump capacitors still require careful placement. Use controlled grounding and keep the connector-side interface path physically separated from sensitive measurement circuitry.
推薦
Serial Service Port
The MAX202CDE4 can support a service or configuration port on embedded equipment that uses an RS-232 link for diagnostics, firmware commands, or maintenance. Its 5 V operating requirement enables integration with a conventional embedded supply, and the ±15 kV Human-Body-Model ESD rating is relevant when the port is connected through an external cable. The 120 kbit/s maximum data rate suits low-bandwidth service traffic. Designers should provide an appropriate connector, solid reference grounding, and layout separation between the charge-pump network and precision analog sections.
推薦
Instrument Communication Interface
MAX202CDE4 is suitable for two-channel communication between a controller and external test or measurement instruments. One transmitter and one receiver can form a full-duplex path, while the second pair provides an additional channel or alternate routing option. The supported 120 kbit/s rate is appropriate for many instrument-control protocols, and the 5 V supply simplifies interface implementation around embedded processors. Because RS-232 is a single-ended interface, maintain a consistent signal-ground strategy and place the line-driver circuitry away from high-gain analog front ends to limit ground-current coupling.
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Point-to-Point Data Link
The MAX202CDE4 can implement a point-to-point RS-232 link between two pieces of equipment. Two transmitters and two receivers provide flexible channel assignment, while the 120 kbit/s maximum rate covers traditional serial-control traffic. The integrated ±15 kV Human-Body-Model protection strengthens the interface against electrostatic discharge encountered on connected cables. Design the board with short charge-pump capacitor connections, a defined signal ground, and protection-aware cable routing; these practices are as important as the IC rating for dependable field behavior.
推薦
Embedded Equipment Communication
MAX202CDE4 fits embedded equipment that must communicate with an RS-232 peripheral using a compact, 16-pin SOIC interface. The 5 V operating voltage and 120 kbit/s data rate align with many legacy control ports, while the dual-channel arrangement can support either two serial links or a full-duplex command path plus auxiliary channel. Its external 0.1 µF charge-pump capacitors should be placed directly at the proper pins. For systems containing sensors or precision converters, keep the switching-capacitor currents from coupling into high-impedance measurement nodes.
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推薦產品摘要
工程參考資料，適用於 MAX202CDE4 — 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 | MAX202CPE+ | MAX202CSE+ | MAX202EPE+ | MAX202ESE+ | MAX202CPE+ |
|---|---|---|---|---|---|---|
| Package | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC | 16-pin SOIC |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Product Function | Dual RS-232 line driver/receiver | Dual RS-232 line driver/receiver | Dual RS-232 line driver/receiver | Dual RS-232 line driver/receiver | Dual RS-232 line driver/receiver | Dual RS-232 line driver/receiver |
| Supply Voltage | 5 V | 5 V | 5 V | 5 V | 5 V | 5 V |
| Maximum Data Rate | 120 kbit/s | 120 kbit/s | 120 kbit/s | 120 kbit/s | 120 kbit/s | 120 kbit/s |
| ESD Protection | ±15 kV, Human-Body Model | ±15 kV, Human-Body Model | ±15 kV, Human-Body Model | ±15 kV, Human-Body Model | ±15 kV, Human-Body Model | ±15 kV, Human-Body Model |
| External Charge-Pump Capacitor | 0.1 µF | 0.1 µF | 0.1 µF | 0.1 µF | 0.1 µF | 0.1 µF |
| Transmitters | 2 | 2 | 2 | 2 | 2 | 2 |
| Receivers | 2 | 2 | 2 | 2 | 2 | 2 |
主要差異化特點
- Integrated dual-channel RS-232 interface (對比MAX202CPE+ from Analog Devices)
- 15 kV Human-Body-Model ESD protection (對比MAX202CPE+ from Analog Devices)
- Specified external charge-pump network (對比MAX202CSE+)
設計說明
Place the specified 0.1 µF charge-pump capacitors directly across their designated pins and keep the current loops as small as practical. The Texas Instruments manufacturer datasheet identifies these capacitors as external circuit elements, so their placement is part of the interface implementation. Avoid placing long copper paths between the capacitor, IC, and ground connection because those paths carry switching current and can increase radiated emissions or disturb nearby sensitive circuits.
Do not substitute generic bypass capacitors for the charge-pump capacitors without checking the datasheet's capacitance and voltage requirements. The stated 0.1 µF value is part of the MAX202 operating circuit. Also confirm that each device is oriented according to the SOIC pin-one marking and that the transmit and receive pins are assigned correctly; incorrect driver-to-receiver routing can cause contention and unreliable communication.
Keep the connector, RS-232 bus traces, and charge-pump section away from precision analog inputs and high-speed clock paths. The MAX202's charge-pump operation can return switching current through imperfect ground connections, while RS-232 is a single-ended interface susceptible to ground-potential differences. Use a defined signal-ground topology, minimize shared conductor length, and follow the manufacturer layout guidance when separating logic and analog return currents.
Treat RS-232 routing as a defined single-ended channel with controlled reference ground, not as a high-speed differential pair. Avoid long stubs, unnecessary vias, and sharp copper transitions where practical. The device supports up to 120 kbit/s, but cable length, baud rate, logic thresholds, and grounding can determine the practical communication reliability. Verify the complete link with the intended cable and equipment before considering the interface production-ready.
合規資訊
The interface complies with TIA/EIA-232-F and ITU V.28 according to the Texas Instruments manufacturer datasheet. Specific RoHS, REACH, halogen-free, lead-free, and conflict-minerals declarations require confirmation from current manufacturer documentation.