MAX3232CD - 2/2 RS-232 Transceiver, 250 kbit/s | Texas Instruments
料号： MAX3232CD ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0.7831 | $0.78 |
| 10 | $0.7831 | $7.83 |
| 100 | $0.7831 | $78.31 |
| 500 | $0.7831 | $391.55 |
| 1,000 | $0.7831 | $783.10 |
MAX3232CD 概述
An RS-232 transceiver is an interface IC that combines transmit drivers, receive buffers, and the voltage-level conversion required between low-voltage digital logic and the bipolar RS-232 signal system. The MAX3232CD belongs to the broader interface-IC hierarchy: RS-232 transceiver, communications interface, interface IC, and semiconductor. Its dual-channel arrangement suits point-to-point links, industrial-control connections, console ports, and embedded equipment where both directions of communication are required.
The verified device data identifies a 3 V to 5.5 V supply range, two drivers, two receivers, operation up to 250 kbit/s, typical low supply current of 300 µA, and ±15 kV ESD protection. The interface accepts 5 V logic, while the integrated charge-pump and external-capacitor arrangement supports RS-232 signal generation without a separate external power supply. The 16-pin SOIC package provides a compact surface-mount footprint suitable for PCB-based equipment.
Typical applications include RS-232 console connections, industrial serial controllers, point-of-sale equipment, test instruments, and embedded systems communicating with legacy peripherals. The 250 kbit/s capability supports substantially faster signaling than conventional low-speed serial links while retaining the standardized RS-232 voltage interface. The external charge-pump capacitors must be placed according to the manufacturer layout guidance to preserve signal integrity and ensure stable operation.
When selecting MAX3232CD, verify the required package, temperature range, supply voltage, channel count, and cable-side signaling expectations. Do not substitute a similar part solely by transceiver count; check pinout, logic compatibility, propagation behavior, and the exact package suffix. The MAX3232CD is listed by distributors as a 16-SOIC, 2/2 full RS-232 transceiver, making the package and channel configuration central to drop-in design decisions.
This page consolidates verified distributor pricing, source URLs, package information, interface specifications, and design guidance for engineers evaluating the MAX3232CD. It also distinguishes verified facts from fields that require datasheet confirmation before production release.
直接替换替代料： MAX3232CD ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MAX3232CD （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, Data Rate.
快速对比工具——选择替代料号进行并排对比：
SP3232EBCN-L
✅ 直接替换📋 参考替代料（不在目录中）
MAX3232ECDB
✅ 直接替换✓ 有现货
$1.49 / 个
查看数据手册 →MAX3232CD 规格参数
| Product Type | Multichannel RS-232 line driver/receiver |
| Supply Voltage Range | 3 V to 5.5 V |
| Number of Drivers | 2 |
| Number of Receivers | 2 |
| Maximum Data Rate | 250 kbit/s |
| Logic Compatibility | Accepts 5 V logic |
| Typical Supply Current | 300 µA |
| ESD Protection | ±15 kV |
| External Capacitors | Required charge-pump capacitors; datasheet application uses 0.1 µF capacitors |
| 封装 | 16-pin SOIC |
| 安装类型 | Surface mount |
| 工作温度 | 0 °C to 70 °C |
| RS-232 Standards | TIA/EIA-232-F and ITU V.28 |
| Lead Status | Lead-free |
MAX3232CD 引脚配置
| 引脚 1 | R1OUT — Receiver 1 output |
| 引脚 2 | R1IN — Receiver 1 input |
| 引脚 3 | R2IN — Receiver 2 input |
| 引脚 4 | R2OUT — Receiver 2 output |
| 引脚 5 | T2IN — Driver 2 input |
| 引脚 6 | T2OUT — Driver 2 output |
| 引脚 7 | V+ — Positive charge-pump capacitor node |
| 引脚 8 | C1+ — Charge-pump capacitor node |
| 引脚 9 | C1- — Charge-pump capacitor node |
| 引脚 10 | V- — Negative charge-pump capacitor node |
| 引脚 11 | T1OUT — Driver 1 output |
| 引脚 12 | T1IN — Driver 1 input |
| 引脚 13 | GND — Ground |
| 引脚 14 | VCC — Positive supply |
| 引脚 15 | C2+ — Charge-pump capacitor node |
| 引脚 16 | C2- — Charge-pump capacitor node |
典型应用
MAX3232CD 适用于 6 应用s: RS-232 Console Interface, Industrial Serial Controller, Point-of-Sale Terminal, Test and Measurement Equipment, Embedded Data Acquisition System, Legacy Peripheral Upgrade.
RS-232 Console Interface
The MAX3232CD fits console and configuration links where a controller must connect to a legacy RS-232 terminal through a compact surface-mount transceiver. Its two drivers and two receivers support bidirectional communication, while the verified 3 V to 5.5 V operating range allows use with 3.3 V or 5 V system rails. The 250 kbit/s capability is higher than many simple serial-console links, and ±15 kV ESD protection adds useful connector-side robustness. Place the charge-pump capacitors close to the device and follow the exact datasheet layout to minimize signal-integrity problems.
推荐
Industrial Serial Controller
The MAX3232CD is suitable for industrial equipment that exchanges commands and status data with an RS-232 controller or service port. Two transmit and two receive channels provide flexibility for multiple point-to-point links, while the 250 kbit/s rate supports responsive control traffic. Its 300 µA typical supply-current figure is useful for embedded systems, although the complete design must include pull-up, pull-down, protection, and cable requirements. Verify industrial temperature and compliance requirements separately because the verified data identifies the device as a 0 °C to 70 °C part.
推荐
Point-of-Sale Terminal
The MAX3232CD can translate logic-level signals between a compact POS controller and an RS-232 peripheral such as a display, printer, reader, or service interface. Its dual-channel arrangement helps organize separate transmit and receive paths, and the 3 V to 5.5 V supply range accommodates embedded platforms operating from either common rail. The verified 250 kbit/s capability is adequate for many peripheral data streams, but actual throughput depends on protocol overhead and cable conditions. Use the manufacturer capacitor and layout guidance to prevent startup or high-speed signal-integrity issues.
推荐
Test and Measurement Equipment
The MAX3232CD is appropriate for test instruments that need a compact control and status port rather than a full external RS-232 connector controller. The two receivers can monitor multiple incoming signals, and the two drivers can return control commands when the instrument architecture requires bidirectional communication. Its 16-SOIC package helps preserve PCB area in portable and rack-mounted equipment. The 0 °C to 70 °C operating-temperature specification should be checked against the instrument enclosure and production environment before release.
推荐
Embedded Data Acquisition System
The MAX3232CD can connect an embedded acquisition or control board to an RS-232 service interface when the system requires standardized serial voltage levels and protected cable-side inputs. Its two-channel architecture can carry command output and status input, while the 3 V to 5.5 V supply range supports common embedded rails. The 250 kbit/s maximum data rate should be treated as a device capability, not a guarantee of usable distance or throughput in every cable. Confirm grounding, shielding, connector pinout, and logic levels in the complete interface design.
推荐
Legacy Peripheral Upgrade
The MAX3232CD is useful when modernizing equipment that must retain an RS-232 connection to a legacy printer, instrument, or controller while replacing older discrete interface circuitry. Integrating two drivers, two receivers, charge-pump support, and ESD protection into one 16-SOIC device can simplify the PCB compared with separate level-conversion components. The 300 µA typical supply current helps with embedded upgrades, but verify the exact load capacitance and startup behavior. A drop-in alternative should not be selected unless its package, pinout, and electrical timing are independently confirmed.
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推荐产品汇总
工程参考数据： MAX3232CD ——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 | SP3232EBCN-L | MAX3232ECD |
|---|---|---|---|
| Brand | Texas Instruments | MaxLinear | Texas Instruments |
| Package | SOIC-16 | SOIC-16 | SOIC-16 |
关键差异点
- Verified 2/2 RS-232 channel configuration （对比 MAX3232ECD)
- Documented ±15 kV ESD protection （对比 SP3232EBCN-L)
- 250 kbit/s operation with 300 µA typical supply current （对比 SP3232EBCN-L)
设计说明
Place the charge-pump capacitors and the MAX3232CD as close as practical to the device pins, following the exact datasheet layout. Keep the RS-232 driver and receiver traces away from sensitive analog or high-speed digital paths where possible. The verified device requires external capacitors, and incorrect placement can increase startup time, edge distortion, or susceptibility to cable-side noise.
Treat the RS-232 connector side and the logic side as different electrical domains. Use the exact recommended logic-level interfaces, maintain the specified supply decoupling, and verify driver and receiver direction before connecting a board. Although the verified data rates reach 250 kbit/s, cable length, loading, grounding, and connector impedance determine whether that rate is usable in the finished system.
Do not assume that any 2/2 RS-232 transceiver is pin-compatible with MAX3232CD. The verified results identify the target as a 16-SOIC device, but pin assignments and suffix-specific ratings can differ among suppliers. Before a drop-in substitution, compare all 16 pins, supply range, driver and receiver directions, charge-pump capacitor connections, logic thresholds, ESD rating, and temperature grade.
合规信息
The verified search result includes a lead-free description, but the supplied data does not establish RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals status. Verify these claims against the current manufacturer product documentation before release.