MC1489P - Quad RS-232 Line Receiver | STMicroelectronics
N.º de pieza: MC1489P ✓ ActivoMC1489P Descripción general
A line receiver is an interface IC that converts electrical signals arriving over a communication link into logic-level signals for a host controller. As part of the broader hierarchy of interface ICs, line receivers belong to the RS-232 transceiver family and operate alongside line drivers in point-to-point or multidrop serial interfaces. The MC1489P provides four receivers in one package, allowing one device to handle four incoming data channels while reducing board area and component count.
The receiver architecture includes logic threshold shifting, which accommodates RS-232 negative and positive signaling, and input hysteresis, which helps the receiver maintain a defined switching state in the presence of small input-voltage variations. The built-in response control provides input-noise filtering, making the MC1489P suitable for systems where the received serial data must be converted into dependable digital levels. A maximum supply voltage of 10 V provides the key verified operating limit for the supplied device.
The MC1489P is identified as a commercial extended part in the available product data, with an operating temperature range of 0°C to +70°C and a PDIP-14 through-hole package. It is supplied in a tube format for automated or manual production handling. The four-channel arrangement is useful in industrial control links, peripheral interfaces, instrumentation, and embedded systems that need several receive functions without using four separate single-channel receiver packages.
Typical applications include multi-channel RS-232 equipment interfaces, industrial controller serial ports, data-acquisition equipment, test and measurement systems, and embedded control consoles. Because the verified data identifies the part as a receiver rather than a combined transceiver, it is best used on the receive side of an RS-232 connection. A transmit driver may be required separately when the same board also needs to originate RS-232 signals.
The primary design consideration is to validate every external signal against the documented ±30 V input range and to operate the receiver from a supply no greater than 10 V. PCB layout should preserve the pin assignments of the PDIP-14 footprint, provide an unobstructed ground connection, and avoid placing high-current switching paths adjacent to receiver inputs. The available product listing reports a 7 kΩ input resistance, so cable termination and input-biasing decisions should account for that loading.
This page consolidates verified distributor information, package details, practical application guidance, and cross-reference results for the MC1489P. It also distinguishes documented pin-compatible alternatives from parts that are merely functionally similar, helping engineers make package and footprint decisions before committing to a replacement.
Alternativas directas para MC1489P — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
MC1489N
✅ Sustitución directaConsulte el precio
Ver hoja de datos →DS1489N
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
ECG75189
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
NTE75189
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
SN75189AN
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC1489P Especificaciones
| Product Type | Quad line receiver |
| Receiver Configuration | 4 receivers |
| Interface Standard | RS-232 |
| Number of Channels | 4 channels |
| Supply Voltage Maximum | 10 V |
| Input Resistance | 7 kΩ |
| Input Signal Range | ±30 V |
| Input Threshold Hysteresis | Built in |
| Logic Threshold Shifting | Built in |
| Input Noise Filtering | Built-in response control |
| Minimum Operating Temperature | 0°C |
| Maximum Operating Temperature | +70°C |
| Temperature Grade | Commercial extended |
| Encapsulado | PDIP-14 through-hole |
| Terminal Count | 14 terminals |
| Packaging Type | Tube |
Guía de configuración de pines de MC1489P pdip-14 through-hole
Configuración de pines para MC1489P (encapsulado pdip-14 through-hole). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para MC1489P.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
MC1489P es adecuado para 6 aplicacións: Industrial RS-232 Controller Interface, Multi-Channel Data Acquisition, Test and Measurement Instrumentation, Embedded Peripheral Communications, Communication Port Concentrators, Legacy Peripheral Repair and Retrofit.
Industrial RS-232 Controller Interface
The MC1489P fits industrial controller interfaces that receive four RS-232 channels on a legacy through-hole PCB. Its four receivers reduce the component count compared with four single-channel packages, while the verified ±30 V input range accommodates bipolar RS-232 signaling. Built-in hysteresis and response control help reject noise on industrial wiring. The 0°C to +70°C commercial-extended rating covers normal indoor equipment, but it does not cover extended-temperature factory environments.
Recomendado
Multi-Channel Data Acquisition
The MC1489P is suitable for receiving four measurement or control signals from RS-232 test equipment. Its four independent receiver channels and built-in logic threshold shifting support consistent conversion of positive and negative serial inputs to logic levels. The verified 7 kΩ input resistance must be included in source-loading calculations, while the ±30 V input range provides margin for standard RS-232 voltage levels. Noise filtering through the built-in response control is valuable when acquisition leads share a cable bundle.
Recomendado
Test and Measurement Instrumentation
The MC1489P can receive multiple RS-232 command or result channels in laboratory instruments. Four channels in one PDIP-14 package simplify through-hole construction and reduce the number of receiver ICs on older instrument boards. Its threshold shifting accommodates the RS-232 logic polarity, while input hysteresis helps maintain stable decisions as cable voltage changes. Designers should still account for the 7 kΩ input resistance when multiple receivers are connected to a shared source.
Recomendado
Embedded Peripheral Communications
The MC1489P can serve as the receive section of an embedded serial interface when a legacy peripheral presents four RS-232 outputs. Its logic threshold shifting and noise filtering help isolate the host from bipolar line signals, while the through-hole PDIP-14 package remains convenient for repairable and prototype boards. The part does not transmit, so a separate driver is required for bidirectional communication. Its 0°C to +70°C range suits room-temperature embedded equipment rather than uncoded outdoor installations.
Recomendado
Communication Port Concentrators
The MC1489P is a practical receive-side choice for communication port concentrators that must accept several incoming RS-232 links. Consolidating four receivers into one 14-pin package simplifies legacy concentrator layouts, and the verified input range of -30 V to +30 V matches the bipolar nature of RS-232. The device's filtering and hysteresis improve receive robustness, although cable length, grounding, and source loading remain system-level considerations that the IC cannot eliminate.
Recomendado
Legacy Peripheral Repair and Retrofit
The MC1489P is useful for repairing or retrofitting legacy peripherals that use a fourteen-pin through-hole quad receiver footprint. The available cross-reference results identify DS1489N, ECG75189, and NTE75189 as comparable replacements, making the MC1489P relevant to both original repairs and sourcing alternatives. Because the package is PDIP-14 rather than a surface-mount package, retrofit boards must preserve adequate lead spacing and soldering clearance. Pin-level verification remains essential before fitting any substitute.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC1489P — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Use MC1489N when it is the same-brand ordering option whose exact package, pinout, and electrical ratings have been verified. DS1489N is particularly relevant because the supplied distributor data explicitly calls it pin-compatible with the MC1489/MC1489A series. ECG75189, NTE75189, and SN75189AN are reasonable investigation candidates when the exact DIP suffix is confirmed, but they should not be fitted until their thresholds, supply limits, temperature grades, and availability are checked. Because the MC1489P contains receivers only, add a separate line driver for designs that also transmit.
Comparación con alternativas
| Parámetro | Este producto | MC1489N | DS1489N | ECG75189 | NTE75189 | SN75189AN |
|---|---|---|---|---|---|---|
| Package | PDIP-14 through-hole | PDIP-14 through-hole | PDIP-14 configuration | PDIP-14 configuration | PDIP-14 configuration | PDIP-14 configuration |
| Brand | STMicroelectronics | STMicroelectronics | Diodes Incorporated | ECG | NTE | Texas Instruments |
Diferenciadores clave
- Documented bipolar input range (frente a SN75189AN)
- Explicit MC1489-series pin compatibility (frente a DS1489N)
- Four receivers with integrated response control (frente a ECG75189)
- Same 14-pin package and input-loading class for legacy repair (frente a NTE75189)
Notas de diseño
Do not treat a functionally similar quad receiver as a drop-in part without checking the exact package and pin table. The verified MC1489P configuration is PDIP-14, while several cross-reference candidates are offered in multiple package variants. Confirm the ordering suffix, verify that pin 1 and the power and ground positions match the PCB, and compare the receiver thresholds and supply limits before substitution.
Keep the MC1489P receiver inputs away from high-current switching nodes and route the logic outputs away from the input traces. The receiver includes hysteresis and input filtering, but those features do not replace good board layout. Maintain a low-impedance ground return for the device and use the shortest practical input routes to reduce pickup from adjacent power and relay circuits.
The documented maximum supply voltage is 10 V, so the design must not assume 12 V or 15 V tolerance. Confirm the receiver's supply dec requirements from the manufacturer datasheet and keep the supply within the verified limit. The documented ±30 V input range applies to receiver signals, not to the IC supply, and confusing these two ratings can lead to immediate device damage.
Información de cumplimiento
The supplied distributor and datasheet snippets do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status. AEC-Q100 is marked not applicable because the MC1489P is identified as a commercial-grade interface IC rather than an automotive-qualified device.
