MAX3385EEAP - 250kbps RS-232 Transceiver | Analog Devices
料号： MAX3385EEAP ✓ 量产中MAX3385EEAP 概述
An RS-232 transceiver is an interface IC that belongs to the line-driver and line-receiver hierarchy within interface semiconductors. It converts logic-level signals into RS-232-compatible levels in the transmit direction and converts incoming RS-232 levels back into logic levels in the receive direction. The MAX3385EEAP therefore provides the physical signaling layer between equipment logic and a cable-based serial interface.
Key characteristics include support for both 3.0V and 5.5V supply operation, a maximum signaling rate of 250kbps, low-power design, true RS-232 transceiver operation, and ±15kV ESD protection. The 3.0V minimum supply makes the interface suitable for systems whose digital core operates below 5V, while the 5.5V upper limit allows use with conventional 5V equipment. The 250kbps rate supports modern point-to-point serial links without requiring the lower bandwidth associated with legacy communication standards.
The MAX3385EEAP combines two transmit drivers and two receive receivers in one package, matching the conventional direction and signal arrangement used by RS-232 interface designs. Its integrated ESD protection reduces the amount of external protection normally required at a connector or cable entry. Applications still require correct signal routing, suitable bypass capacitance, controlled return paths, and compliance with the applicable RS-232 electrical requirements.
Typical uses include industrial control consoles, test equipment, data acquisition systems, service interfaces, and embedded products that retain an RS-232 port for configuration or diagnostics. The part is particularly useful where modern 3.3V logic must communicate with an RS-232 host while board area and external protection components must be minimized.
Designers should begin with the manufacturer's pin-description table when assigning PCB tracks and must preserve the documented charge-pump and driver topology around the transceiver. Input and supply bypassing should be placed close to the relevant pins, and connector-side protection must be reviewed against the required ESD exposure and working voltage.
This page consolidates the core electrical and package characteristics of the MAX3385EEAP with application guidance, comparison parameters, and practical interface-design considerations. It is intended to help engineers determine whether the device's voltage range, data rate, package, and protection level match a particular RS-232 design before committing the footprint to a PCB.
直接替换替代料： MAX3385EEAP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MAX3385E
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MAX3385EEAP 规格参数
| Device Type | RS-232 transceiver |
| Number of Transmitters | 2 |
| Number of Receivers | 2 |
| Supply Voltage Range | 3.0V to 5.5V |
| Maximum Data Rate | 250kbps |
| ESD Protection | ±15kV |
| Power Class | Low-power |
| Interface Standard | RS-232 |
| 封装 | 20-pin SSOP |
| Terminal Count | 20 |
| Package Shape | Rectangular |
| Lead Form | Gull wing |
| 安装类型 | Surface mount |
| RoHS 状态 | Non-compliant |
| AEC-Q100 Qualification | Not applicable |
MAX3385EEAP rectangular 引脚配置指南
MAX3385EEAP（rectangular 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： MAX3385EEAP.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MAX3385EEAP 适用于 6 应用s: Industrial Control Consoles, Data Acquisition Equipment, Embedded Diagnostic Interfaces, Test and Measurement Instruments, Serial Printers and Point-of-Sale Equipment, Network Equipment Service Ports.
Industrial Control Consoles
The MAX3385EEAP fits industrial control consoles that need an RS-232 service port while using modern low-voltage logic. Its 3.0V to 5.5V supply range allows operation from a 3.3V control platform, while the 250kbps maximum data rate supports configuration downloads, diagnostic logs, and short command exchanges. The integrated ±15kV ESD protection adds useful robustness where the serial connector is exposed to routine handling and cable transients. Place the transceiver between the logic connector and protected RS-232 lines, observe the manufacturer's bypass-capacitor recommendations, and provide a controlled chassis or signal return to reduce common-mode noise.
推荐
Data Acquisition Equipment
The MAX3385EEAP is appropriate for laboratory and industrial data-acquisition equipment that retains an RS-232 configuration or calibration port. A 250kbps interface rate can transfer commands and compact status information efficiently, while the 3.0V minimum supply supports interface logic operating from 3.3V. The ±15kV ESD protection helps protect the transceiver when users connect external cables, although instrumentation designs may require additional attenuation, filtering, or surge protection. Keep the RS-232 traces short where practical, route the logic-side signals away from analog inputs, and use the manufacturer's pin-description table to implement the power, ground, and charge-pump connections correctly.
推荐
Embedded Diagnostic Interfaces
The MAX3385EEAP can provide a dedicated diagnostic channel for embedded controllers, industrial appliances, and field-service equipment. Its low-power 3.3V-compatible operating range leaves more of the supply budget for logic and processing, while the 20-pin SSOP package supports compact board layouts. At up to 250kbps, the link is suitable for boot logs, status messages, configuration commands, and firmware update initiation. The interface should be enabled only when required if system power management prioritizes standby consumption. Keep the serial connector away from high-current switching paths and use a solid return connection to the logic ground according to the system grounding strategy.
推荐
Test and Measurement Instruments
The MAX3385EEAP is suitable for test and measurement instruments that communicate with legacy computers, printers, or automated test systems through RS-232. The 3.0V to 5.5V supply range supports both modern instrument control logic and older 5V interface sections, and the 250kbps rate is useful for command traffic and measurement data where latency remains acceptable. Integrated ±15kV ESD protection improves resilience to user-connected cables. During instrument design, separate the transceiver from sensitive analog or RF sections, maintain the recommended bypass capacitance at the device, and evaluate additional attenuation or protection for long cables or electrically noisy environments.
推荐
Serial Printers and Point-of-Sale Equipment
The MAX3385EEAP can bridge a low-voltage embedded controller to an RS-232 receipt printer or point-of-sale peripheral. Its 250kbps capability exceeds the requirements of many transactional printer links and provides margin for command acknowledgment traffic. The device operates from a 3.0V to 5.5V supply, which is useful in compact systems based on 3.3V logic, while ±15kV ESD protection supports connection to an external cable. Route the driver outputs and receiver inputs away from switching regulators and noisy relay nodes. Confirm cable length, grounding, and the peripheral's logic levels before production use because RS-232 voltage levels are not directly interchangeable with CMOS levels.
推荐
Network Equipment Service Ports
The MAX3385EEAP is suitable for a service or management port on network appliances where an RS-232 connector remains available for installation and maintenance. The 3.3V-compatible supply range helps integrate the interface with modern network-controller platforms, and the 250kbps rate is sufficient for console sessions and configuration transfer. The ±15kV ESD rating is particularly relevant to equipment that may be connected during installation or service. Place the interface near the connector, maintain separation from Ethernet magnetics and high-speed switching nodes, and use controlled grounding. If the equipment requires galvanic isolation or remote cable exposure beyond the connector boundary, add the appropriate isolation and surge-protection network.
推荐
推荐产品汇总
工程参考数据： MAX3385EEAP ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MAX3385E |
|---|---|---|
| Brand | Analog Devices | Analog Devices |
| Package | 20-pin SSOP | 20-pin SSOP |
| Device Type | RS-232 transceiver | RS-232 transceiver |
关键差异点
- Supports 3.3V system logic directly （对比 MAX3385E)
- Supports a 250kbps RS-232 data rate （对比 MAX3385E)
- Integrates ±15kV ESD protection （对比 MAX3385E)
- Uses a compact 20-pin SSOP footprint （对比 MAX3385E)
设计说明
Route the RS-232 driver and receiver nets directly to their assigned connector or protection-network locations, and keep those paths away from switching nodes and high-current relay traces. Use the manufacturer's pin-description table to assign all 20 SSOP terminals, including supply, ground, receiver outputs, driver inputs, and any charge-pump or enable-related connections. Place input and bypass capacitors close to their specified pins with short ground returns.
RS-232 signaling can be affected by common-mode voltage on long or unshielded cables. Establish a predictable return path between the two connected systems, avoid floating signal references, and keep the cable interface away from sources of large transient currents. The MAX3385EEAP provides ±15kV ESD protection, but that rating does not replace a surge-protection network when the cable will encounter sustained overvoltage or severe lightning exposure.
Do not treat the 250kbps rating as a guarantee of long-distance communication. RS-232 cable length, baud rate, capacitance, ground reference, driver loading, and receiver thresholds all affect the usable link. Also confirm that the connected equipment uses ±RS-232 signaling rather than RS-485, RS-422, or logic-level serial signals, because those interfaces are not electrically interchangeable even when their connector pinouts appear similar.
Check the transceiver's supply current and line-loading behavior against the power budget for every supported operating state. Although the MAX3385EEAP is identified as a low-power device operating from 3.0V to 5.5V, the exact supply current is not listed here and should be taken from the manufacturer datasheet. Apply the recommended supply decoupling and avoid placing the interface's switching activity on an unprotected sensitive analog rail.
合规信息
The product listing explicitly identifies the MAX3385EEAP as RoHS non-compliant. No manufacturer statement for REACH, lead-free status, halogen-free status, or conflict-minerals compliance was identified.
