MC1489AN - Quad RS-232 Receiver, 5V, 14-PDIP | Texas Instruments
料号： MC1489AN ✓ 量产中MC1489AN 概述
A line receiver is an interface IC that converts bipolar RS-232 signals into logic-level digital signals. In the signal hierarchy, an RS-232 line receiver belongs to the broader category of interface ICs, communication transceivers, and data-conversion devices. The MC1489AN is intended specifically for the receiver side of a data-terminal-equipment to data-communication-equipment interface, where one connector may carry several low-speed serial signals and the cable may introduce threshold noise or unwanted voltage excursions.
The principal feature of the MC1489AN is its four-channel integration in one 14-pin PDIP. Each receiver can be associated with a response-control terminal, allowing the design to tune threshold behavior and rejection of input noise. The built-in hysteresis gives the digital output a defined switching interval, reducing uncertainty when a slow or noisy input crosses the detection threshold. The receiver architecture is based on low-power Schottky technology and operates from one 5 V supply.
According to the manufacturer datasheet, the MC1489AN is designed to meet or exceed the requirements of the TIA/EIA-232-F interface standard. Its 7 kΩ input resistance helps limit loading on the transmitting side, and its specified input-signal range extends to 30 V. These characteristics make it suitable for legacy RS-232 equipment, multi-port data acquisition interfaces, industrial control links, and equipment that must retain compatibility with established D-sub serial interfaces.
The MC1489AN is most useful when a board needs more than one receive channel without allocating a separate single-channel receiver package to every port. Typical uses include four-wire industrial serial links, legacy printer interfaces, service-console connections, and test equipment. Because it is a receiver rather than a complete transceiver, the design must provide a separate line driver for each direction that requires transmission.
Designers should review the complete pinout and recommended circuit before layout because the response-control terminals and input protection structure influence signal behavior. Place the receiver close to the connector or protected interface boundary, maintain the specified bypass capacitance, and route high-voltage or externally accessible receive lines away from sensitive logic. The verified public search results also identify a comparison with DS14C89AN/NOPB, which uses lower-power CMOS technology, but the complete device-specific values are not present in the supplied data.
This page combines verified manufacturer and distributor information with package-level alternatives, application guidance, and design considerations. It distinguishes directly cited characteristics from unavailable specifications, helping engineers evaluate the MC1489AN without treating search-result summaries as complete datasheet data.
直接替换替代料： MC1489AN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MC1489P
✅ 直接替换联系询价
查看数据手册 →MC1489N
✅ 直接替换联系询价
查看数据手册 →SN75189AN
✅ 直接替换📋 参考替代料（不在目录中）
DS1489AN
✅ 直接替换📋 参考替代料（不在目录中）
MC1489AN 规格参数
| Receiver Type | Quadruple line receiver |
| Interface Standard | TIA/EIA-232-F |
| Number of Receiver Channels | 4 channels |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Nominal Supply Voltage | 5 V |
| Input Resistance | 7 kΩ |
| Maximum Input Signal Range | 30 V |
| Input Hysteresis | Double-threshold hysteresis |
| Response Control | One response-control terminal per receiver |
| Input Noise Filtering | Supported through response-control function |
| Input Threshold Shifting | Supported through response-control function |
| 工作温度范围 | 0 °C to 70 °C |
| 封装 | 14-pin PDIP |
| 引脚数量 | 14 pins |
| 安装类型 | Through-hole |
MC1489AN 14-pin pdip 引脚配置指南
MC1489AN（14-pin pdip 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： MC1489AN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC1489AN 适用于 6 应用s: Industrial RS-232 Data Acquisition, Legacy Printer and Terminal Interface, Multi-Port Test and Measurement Equipment, Instrument Control and Service Console, Communication Port Concentrator, Embedded Controller Serial Port.
Industrial RS-232 Data Acquisition
The MC1489AN is appropriate for a four-channel industrial data-acquisition interface because it provides four independent RS-232 receivers, a 4.5 V to 5.5 V supply range, and a 0 °C to 70 °C operating range. Each receiver includes double-threshold hysteresis, while its response-control terminal permits threshold shifting and noise filtering. The device can sit between a protected connector and the board’s digital input circuitry, reducing the number of separate receiver packages. Because the verified material does not provide full timing, output-current, or common-mode limits, the system engineer should confirm those values from the manufacturer datasheet before setting channel bandwidth or fault thresholds.
推荐
Legacy Printer and Terminal Interface
The MC1489AN can support receive channels in legacy printer, terminal, and service-console equipment that still uses TIA/EIA-232-F signaling. Four integrated receivers reduce the package count compared with four individual receive-only ICs, while the 30 V input signal range provides tolerance for interface transients and cable-induced excursions. Its 7 kΩ input resistance helps control loading on the connected driver, and the response-control connection gives the designer a way to tune input behavior when noise appears near the switching threshold. The final implementation must include the manufacturer-recommended protection and bypass network because the supplied verification does not specify transient withstand ratings.
推荐
Multi-Port Test and Measurement Equipment
The MC1489AN is useful in test and measurement equipment that must receive four low-speed serial commands or status streams. Its four channels and double-threshold hysteresis support interfaces whose received levels may vary because of cable length or grounding differences. The 4.5 V to 5.5 V operating range permits use with conventional 5 V logic systems, while the external response-control terminal can be used to refine noise rejection in channel-by-channel layouts. For laboratory and production-test products, engineers should still verify logic-level thresholds, output rise and fall times, and channel-to-channel behavior from the complete Texas Instruments datasheet before defining test timing.
推荐
Instrument Control and Service Console
The MC1489AN fits an instrument-control board that must accept commands from one or more service consoles while sharing a common 5 V rail. Four receivers permit separate receive-only channels to be consolidated in one 14-pin PDIP, and the response-control feature supports threshold adjustment when long or imperfectly terminated cables are used. The IC is a receiver only, so any port that must transmit also needs a separate RS-232 driver. A suitable architecture places the MC1489AN close to the D-sub interface protection network, uses a defined reference ground, and connects its logic outputs to an appropriately buffered control section.
推荐
Communication Port Concentrator
The MC1489AN can serve as the receive section of a communication-port concentrator that gathers several legacy serial inputs onto a common digital bus or processor interface. The four-channel 14-pin PDIP implementation allows two devices to provide eight receive functions while keeping each protected receive path physically close to its connector. Its low-power Schottky implementation is intended for single-supply operation, and the built-in hysteresis provides distinct switching behavior as the received voltage crosses the threshold. System timing must still be checked against the complete propagation-delay specification, which is not present in the supplied excerpts and therefore is not inferred here.
推荐
Embedded Controller Serial Port
The MC1489AN is applicable to an embedded controller board that accepts four legacy RS-232 inputs alongside a modern processor or microcontroller. Its 4.5 V to 5.5 V operating range aligns with conventional 5 V embedded systems, and the 14-pin PDIP format can simplify repair and retrofit work on larger control boards. Double-threshold hysteresis helps prevent repeated output transitions when a receiver input hovers near the detection point. The device should not replace a powered line driver on transmit-enabled ports; instead, it complements the driver. Logic-level compatibility, receiver output drive capability, and grounding strategy must be verified against the full datasheet and the host controller requirements.
推荐
推荐产品汇总
工程参考数据： MC1489AN ——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 | MC1489P | MC1489N | SN75189AN | DS1489AN | SN75189N |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP | 14-pin PDIP |
关键差异点
- Four receiver channels in one 14-pin PDIP （对比 SN75189AN)
- Documented response-control functionality （对比 DS1489AN)
- Verified 30 V input signal range （对比 SN75189N)
- Direct manufacturer documentation and explicit temperature rating （对比 MC1489P)
设计说明
Do not treat the MC1489AN as a complete RS-232 transceiver. It contains four receivers but no transmit drivers, so bidirectional ports require a separate line-driver device. Before substituting SN75189AN, DS1489AN, MC1489P, or MC1489N, compare the numbered 14-pin PDIP diagram and confirm that each receiver retains an equivalent response-control connection, supply range, input threshold, input-voltage tolerance, and operating-temperature grade.
Place the receiver close to the protected connector or interface boundary and keep the receive traces short and physically separated from switching nodes. Follow the manufacturer datasheet for the input protection, response-control network, and bypass capacitors. The verified material does not reproduce the capacitor values, so do not invent them; use the official typical-application circuit as the controlling reference during PCB layout.
Use the response-control terminals to manage receiver threshold behavior and noise filtering where the cable is long or the signal source has slow transitions. Double-threshold hysteresis helps prevent repeated output changes near the threshold, but it does not remove common-mode noise or guarantee a specific noise-immunity margin. Validate each channel with the worst-case source impedance, cable length, ground offset, and switching environment used in the finished product.
The MC1489AN requires a single 4.5 V to 5.5 V supply, with 5 V identified as the nominal condition. Provide local supply decoupling exactly as specified in the manufacturer datasheet and route the return current without sharing narrow paths with noisy output drivers. The supplied search results do not state quiescent current or absolute maximum ratings, so supply capacity and startup margin must be calculated from the full datasheet rather than inferred from the interface-standard description.
合规信息
The verified manufacturer information states compliance with TIA/EIA-232-F interface requirements. No explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was supplied, so those fields remain unknown. AEC-Q100 is not applicable to this commercial 0 °C to 70 °C interface device based on the available product classification.