MC1489AP - Quad RS-232 Receiver | STMicroelectronics
料号： MC1489AP ✓ 量产中MC1489AP 概述
An RS-232 receiver is a line-interface component that converts bipolar serial data arriving at a communications port into logic-level signals for a digital system. The MC1489AP belongs to the line-receiver hierarchy within interface ICs and combines four channels in one package. Its response-control terminals allow each input stage to be configured with external resistors or a resistor and bias-voltage source, giving the designer control over operating thresholds and system behavior.
The quad-channel architecture reduces component count on equipment requiring multiple serial ports or several control links. Its specified input resistance of 3.0 kΩ to 7.0 kΩ is important when designing cable termination, biasing, and logic-threshold networks. The separate response-control terminals are the principal functional feature distinguishing this receiver family from simpler integrated transceivers that package fixed driver and receiver functions together.
The MC1489AP is based on low-power Schottky line-receiver circuitry. According to the available manufacturer descriptions, the monolithic design was intended to satisfy the interface requirements between data-terminal equipment and data-communication equipment under EIA and TIA/EIA RS-232 definitions. Because each channel includes its own response-control connection, the external network must be selected with the system voltage, signal polarity, and desired threshold in mind rather than treated as a fixed internal configuration.
Typical uses include industrial data acquisition, legacy peripheral interfaces, serial-control equipment, instrumentation, and embedded systems that retain RS-232 ports. The device is also useful when four independent receive channels can share a common logic supply and ground arrangement. Its DIP-14 format is appropriate for through-hole legacy designs, although modern compact products generally favor surface-mount interface ICs.
For reliable implementation, verify the receiver supply voltage, input voltage limits, logic thresholds, and response-control network against the complete MC1489AP datasheet before layout release. Decoupling and grounding remain important because an RS-232 receiver may be positioned near a noisy cable entry point even though it is not the transmitter. Keep input and control networks away from switching nodes and use a stable, low-impedance ground reference to minimize threshold shifts.
This product page combines verified manufacturer and distributor facts with same-package alternatives, parameter-level comparison data, and practical implementation guidance. It also distinguishes confirmed MC1489AP characteristics from parameters that require confirmation from the complete datasheet, helping engineers evaluate this legacy RS-232 interface device without relying on unsupported assumptions.
直接替换替代料： MC1489AP ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MC1489AN
✅ 直接替换联系询价
查看数据手册 →MC1489AD
✅ 直接替换📋 参考替代料（不在目录中）
MC1489N
✅ 直接替换联系询价
查看数据手册 →MC1489P
✅ 直接替换联系询价
查看数据手册 →DS14C89AN/NOPB
✅ 直接替换📋 参考替代料（不在目录中）
MC1489AP 规格参数
| Receiver Configuration | Quad line receiver |
| Number of Channels | 4 channels |
| Interface Standard | TIA/EIA-232-F and RS-232C/EIA-232-D |
| Input Resistance | 3.0 kΩ to 7.0 kΩ |
| 封装 | 14-pin DIP |
| 安装类型 | Through-hole |
| Response-Control Terminal | 1 terminal per receiver |
| Response-Control Configuration | Resistor or resistor and bias-voltage source |
| Technology | Monolithic low-power Schottky |
| 工作温度范围 | -40°C to +105°C (TA) |
| RoHS 状态 | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | not_applicable |
MC1489AP 14-pin dip 引脚配置指南
MC1489AP（14-pin dip 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： MC1489AP.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC1489AP 适用于 6 应用s: Legacy RS-232 Equipment Interfaces, Industrial Data Acquisition, Instrument Control Ports, Serial Peripheral Connectivity, Embedded Controller Communication, Field-Service and Diagnostic Equipment.
Legacy RS-232 Equipment Interfaces
The MC1489AP fits legacy RS-232 equipment requiring four receive paths on a through-hole board. Its four channels consolidate receiver functions into one 14-pin DIP device, while the specified 3.0 kΩ to 7.0 kΩ input resistance supports external termination and threshold design. The response-control terminal on each channel allows the implementation to use a resistor alone or a resistor with a bias-voltage source. Designers maintaining industrial terminals, test equipment, or peripheral interfaces should use the manufacturer circuit guidance to select those external networks and verify the receiver supply and logic thresholds against the complete datasheet.
推荐
Industrial Data Acquisition
MC1489AP is suitable for industrial acquisition equipment that must receive multiple serial data channels in a noisy enclosure. Its four receivers and individually configurable response-control terminals provide useful threshold flexibility, while the 3.0 kΩ to 7.0 kΩ input-resistance range provides a defined basis for external biasing. Place the device near the protected connector entry but keep switching regulators and high-current returns separated from the receiver ground path. Verify the complete MC1489AP pin map and external response-control values before production because the supplied web excerpts do not specify supply limits or logic thresholds.
推荐
Instrument Control Ports
The MC1489AP can support legacy instrument-control links requiring several receive-only RS-232 channels. Quad integration reduces the number of receiver packages and simplifies through-hole routing, while the independent response-control pins permit channel-specific threshold networks when signal levels differ. In a laboratory instrument, keep the input network away from relay coils, display supplies, and fan drive stages to avoid false transitions. The confirmed -40°C to +105°C ambient operating specification supports industrial temperature-range designs, although supply voltage and absolute maximum ratings must be confirmed from the full datasheet.
推荐
Serial Peripheral Connectivity
MC1489AP is appropriate for older printers, scanners, and service equipment that expose several RS-232 receive lines through a 14-pin DIP interface. The monolithic quad receiver reduces assembly count, and the independently controlled channels can be biased for the voltage levels present at each connector. Designers should confirm ground continuity, cable shielding, and logic polarity at the system boundary. The supplied sources identify the device as an RS-232 receiver rather than a complete transceiver, so an appropriate line driver is still required for outbound data; the verified external component data does not provide a dedicated MC1489AP driver recommendation.
推荐
Embedded Controller Communication
The MC1489AP can translate four RS-232 receive inputs for an embedded controller or legacy processor board. By keeping reception and transmission in separate ICs, a system can allocate receiver channels independently and use the response-control terminals for tailored threshold networks. Route the connector-side traces away from processor clock and memory buses, and provide a low-impedance ground plane to preserve receiver thresholds. Although the DIP-14 package is convenient for legacy control boards, new compact embedded products may prefer a surface-mount transceiver. Any modernization should be checked against the exact MC1489AP terminal assignment and electrical limits.
推荐
Field-Service and Diagnostic Equipment
MC1489AP is useful in field-service equipment that receives commands or status data over multiple RS-232 lines. Its four-channel package allows a compact through-hole implementation, and the externally adjustable response-control terminals provide flexibility when interfacing equipment with different threshold requirements. Protect each input according to the connector exposure and keep the receiver supply clean with local decoupling. The stated 3.0 kΩ to 7.0 kΩ input resistance and -40°C to +105°C TA range are confirmed, but input voltage limits, output levels, and supply range are not provided in the verified excerpts and must be checked in the manufacturer datasheet.
推荐
推荐产品汇总
工程参考数据： MC1489AP ——对比、设计指导和合规信息。
选型指南
Consider DS14C89AN/NOPB only after a full pin and threshold comparison. The verified TI material warns that related receivers can have different functionality and pinouts, so it is not automatically interchangeable despite using DIP-14. For a new compact product, consider a modern surface-mount transceiver such as MAX232DR or SP232ECT-L from the site list, but validate noise, supply, and pin requirements rather than assuming equivalence. MC1489AP remains most appropriate for repair, industrial maintenance, and legacy equipment where its established DIP-14 implementation reduces mechanical risk.
与替代料对比
| 参数 | 本产品 | MC1489AN | MC1489AD | MC1489N | MC1489P | DS14C89AN/NOPB |
|---|---|---|---|---|---|---|
| Package | DIP-14 | DIP-14 | DIP-14 | DIP-14 | DIP-14 | DIP-14 |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | STMicroelectronics | Texas Instruments |
| Receiver Channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels | 4 channels |
| Interface Type | RS-232 receiver | RS-232 receiver | RS-232 receiver | RS-232 receiver | RS-232 receiver | Quad RS-232 receiver |
关键差异点
- Independently configurable receive channels （对比 DS14C89AN/NOPB)
- Confirmed input-resistance range （对比 DS14C89AN/NOPB)
- Same-family package continuity （对比 DS14C89AN/NOPB)
设计说明
Do not treat an RS-232 receiver and an RS-232 transceiver as interchangeable functions. The MC1489AP provides four receive channels, so a board that also transmits requires a suitable line-driver or transceiver circuit. Also confirm the exact terminal map because the verified excerpts establish the 14-pin DIP package but do not provide a complete pin-assignment table.
Keep connector-side receiver traces short and route them away from switching-power nodes, relay drivers, and high-speed clocks. Provide a continuous ground reference beneath the interface area and use local supply decoupling at the device. These layout measures matter because the confirmed 3.0 kΩ to 7.0 kΩ input resistance and external response-control network determine the receiver's susceptibility to threshold shifts and noise.
The supplied data confirms operation from -40°C to +105°C TA but does not state the supply-voltage range, input limits, or output levels. Before schematic release, verify those values in the complete manufacturer datasheet, calculate the logic-level compatibility with the receiving controller, and confirm the external resistor and bias components used on each response-control terminal.
合规信息
The supplied manufacturer and distributor excerpts do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals compliance. No compliance claim has been inferred.
