MC1489AN - Quad RS-232 Receiver, 5V, 14-PDIP | Texas Instruments
MPN： MC1489AN ✓ 啟用中MC1489AN 概覽
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.
直接替換替代品，適用於 MC1489AN — 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。
MC1489P
✅ 直接替換聯絡詢價
查看資料表 →MC1489N
✅ 直接替換聯絡詢價
查看資料表 →SN75189AN
✅ 直接替換📋 參考替代品（不在目錄中）
DS1489AN
✅ 直接替換📋 參考替代品（不在目錄中）
MC1489AN 規格
| 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 |
| 工作溫度範圍 | 0 °C to 70 °C |
| 封裝 | 14-pin PDIP |
| 腳位數 | 14 pins |
| 安裝類型 | Through-hole |
MC1489AN 14-pin pdip 腳位配置指南
MC1489AN（14-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： MC1489AN.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC1489AN 適用於 6 應用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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
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.
推薦
推薦產品摘要
工程參考資料，適用於 MC1489AN — 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 | 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 |
主要差異化特點
- Four receiver channels in one 14-pin PDIP (對比SN75189AN)
- Documented response-control functionality (對比DS1489AN)
- Verified 30 V input signal range (對比SN75189N)
- Direct manufacturer documentation and explicit temperature rating (對比MC1489P)
設計說明
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.
合規資訊
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.