MC1489D - Quad EIA-232D Line Receiver | onsemi | SOIC-14
MPN: MC1489D ✗ סוף ייצורMC1489D סקירה
A line receiver, also called an RS-232 receiver, is an interface IC that recovers digital data from a ±3 V to ±15 V RS-232 signal while rejecting the common-mode voltage present on long cables. Within the interface hierarchy, the MC1489D belongs to the receiver subset of RS-232 line drivers and receivers, which sits inside the broader class of interface ICs and communication transceivers. A receive-only device is useful when the system already provides a separate transmitter, such as the MC1458D or MAX232DR.
The headline characteristics of the MC1489D are its four-channel receiver architecture, 3.0 kΩ to 7.0 kΩ input resistance, and approximately ±30 V input signal capability. Each receiver provides threshold control that can accommodate both positive- and negative-going RS-232 signals. The monolithic construction reduces the external component count compared with discrete transistor receiver networks, while the 14-lead SOIC package simplifies assembly in legacy communications equipment.
Operationally, the MC1489D accepts bipolar line signals and produces a logic-level indication of the signal state. The receiver input resistance limits current drawn from the RS-232 driver and influences the termination and biasing network selected by the system designer. Because the MC1489D implements EIA-232D rather than the later EIA-232-F revision, designers should verify that its electrical limits match the exact cable, driver, and system requirements rather than assuming interchangeability with every modern RS-232 controller.
Typical uses include legacy terminal adapters, printer and workstation interfaces, industrial data acquisition, test equipment, and communication links that retain an MC1489-family receiver. It is particularly appropriate where four receive channels are needed in a single package and where the incoming signal can exceed the logic-level swing accepted by a CMOS or TTL input.
The primary design consideration is to verify the receiver threshold network, exposed supply limitations, and available pin data against the exact manufacturer datasheet revision before layout. Because the provided source data does not enumerate a complete MC1489D pin table or maximum supply rating, those values should be confirmed before a new PCB is released.
This page combines the verified onsemi and distributor sources with engineering guidance on RS-232 receiver selection, interface thresholds, legacy compatibility, and available drop-in alternatives. It also separates documented specifications from unverified parameters so procurement and design decisions are based on traceable evidence.
חלופות תחליף ישיר עבור MC1489D — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
MC1489ADG
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC1489D-T
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC1489AMELG
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
MC1489D מפרטים
| Receiver Configuration | Quad line receiver |
| Interface Standard | EIA-232D |
| Input Resistance | 3.0 kΩ to 7.0 kΩ |
| Input Signal Range | ±30 V |
| Number of Channels | 4 channels |
| Input Threshold Control | Available per receiver |
| מארז | 14-lead SOIC |
| סוג הרכבה | Surface mount |
| Terminal Form | Gull wing |
| Package Code | SOP |
מדריך תצורת פינים של MC1489D sop
תצורת פינים עבור MC1489D (מארזת sop). מספרי פינים, פונקציות ותרשימי חיבורים מוגדרים ב-Datasheet של היצרן. יש לעיין בו לקבלת ה-footprint המדויק והנחיות הלחמה.
אין נתוני פריסת פינים מפורטים עבור MC1489D.
עיינו ב- גיליון נתונים עבור תצורת פינים מלאה.
יישומים טיפוסיים
MC1489D מתאים עבור 6 יישוםs: Legacy RS-232 Terminal Interfaces, Industrial Serial Data Acquisition, Printer and Peripheral Interfaces, Communications and Network Equipment, Test and Measurement Instrumentation, Custom RS-232 Receive-Only Boards.
Legacy RS-232 Terminal Interfaces
The MC1489D fits four-channel RS-232 reception in legacy terminals, workstations, and equipment consoles because it combines four receivers with a documented 3.0 kΩ to 7.0 kΩ input resistance and approximately ±30 V input capability. Each channel can be conditioned for the incoming bipolar signal and threshold-control network used by the system. Place the receiver close to the connector and provide a stable return path to reduce common-mode noise pickup on long cables. Its 14-lead SOIC package also consolidates four receive functions that would otherwise require separate devices.
Industrial Serial Data Acquisition
The MC1489D is useful in industrial acquisition equipment that must receive bipolar RS-232 levels from controllers, meters, or test fixtures while a separate transmitter handles the return path. Its four receiver channels reduce the component count compared with four single-channel devices, and the wide input range provides margin for cable transients within the verified limits. The EIA-232D implementation should be matched to the existing controller and cable environment. Industrial use also requires separate confirmation of temperature range, ESD performance, and isolation requirements.
Printer and Peripheral Interfaces
The MC1489D can receive data from legacy printers, scanners, and peripheral controllers that expose an RS-232 port, provided a separate transmitter such as the MC1458D supplies the outbound signal path. Four receive channels allow one physical assembly to handle multiple incoming lines without separate receiver packages. The SOIC-14 footprint also supports mixed-signal board layouts where the receiver should be placed near the connector and separated from switching converters and high-current digital circuits.
Communications and Network Equipment
The MC1489D is appropriate for receive-only ports in communication equipment that already contains a dedicated line driver. Its quad channel count consolidates four receive paths in a single 14-lead SOIC, while the 3.0 kΩ to 7.0 kΩ input resistance limits loading on the connected driver. For dependable results, route the cable return with the signal conductors and keep the receiver ground reference close to the interface entry point. The MC1489D should not be selected when the design requires a combined driver and receiver in one package.
Test and Measurement Instrumentation
The MC1489D can serve as the receive section of RS-232-equipped test instruments, programmers, and laboratory interfaces that need four incoming channels. The approximately ±30 V input signal capability accommodates the higher voltage swings associated with RS-232 drivers, while the external threshold network allows each receiver to be tuned for the particular source. Use the four channels only when their required signaling rates are simultaneously satisfied, and check the official timing limits rather than assuming performance from another EIA-232 receiver family.
Custom RS-232 Receive-Only Boards
The MC1489D is a practical choice for a receive-only RS-232 expansion card because the board can use the MC1458D for transmission and devote the MC1489D’s four receivers to inbound data, control, and status lines. The 14-lead SOIC package simplifies routing and leaves board area for isolation, protection, or connector circuitry. Because the MC1489D implements the older EIA-232D specification, designers should compare it against the exact transceiver specifications when the remote equipment uses modern RS-232-F features or nonstandard signaling.
נתוני עזר הנדסיים עבור MC1489D — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | MC1489ADG | MC1489D-T | MC1489AMELG |
|---|---|---|---|---|
| Package | SOIC-14 | SOIC-14 | SOIC-14 | SOIC-14 |
| Brand | onsemi | onsemi | NXP Semiconductors | Rochester Electronics |
| Receiver Configuration | Quad EIA-232D line receiver | Quad MC1489-family line receiver | Quad MC1489-family line receiver | Quad MC1489-family line receiver |
| Interface Standard | EIA-232D | EIA-232D family | EIA-232D family | EIA-232D family |
| Number of Channels | 4 channels | 4 channels | 4 channels | 4 channels |
מבדילים עיקריים
- Direct MC1489-family sourcing path (לעומתMC1489D-T)
- Consolidated four-receiver function (לעומתMC1489ADG)
- Original onsemi manufacturer source (לעומתMC1489AMELG)
הערות תכנון
Place the MC1489D near the RS-232 connector and route each input with its return conductor to minimize differential pickup from switching nodes. Keep the receiver-side ground reference close to the interface connector and separate it from high-current return paths. The receiver input resistance and threshold network determine the loading seen by the driver, so use the manufacturer-recommended values rather than substituting arbitrary impedances.
Do not assume that any quad RS-232 receiver is pin-compatible with the MC1489D. The TI SN75189D is functionally similar but uses a response-control implementation, while the MC1489 family provides receiver threshold control. Confirm the numbered terminals, threshold network, output polarity, enable arrangement, and supply requirements of the exact candidate against the MC1489D datasheet before releasing a substitution.
RS-232 signals are bipolar and referenced to the transmitter ground rather than to a logic ground. Maintain a continuous signal return and prevent large ground-potential differences across the interface. Because the MC1489D targets the older EIA-232D specification, verify its maximum input signal, logic thresholds, and propagation timing against the remote equipment rather than relying on nominal RS-232 labels alone.
Decouple the receiver supply at the device pins and keep the supply return path close to the package ground connection. The supplied data does not state the nominal supply voltage, current, or absolute maximum ratings, so these values must be taken directly from the manufacturer datasheet. Do not infer them from other RS-232 families that may use different rails or quiescent-current requirements.
מידע על תאימות
The supplied verified excerpts do not explicitly state RoHS, REACH, lead-free, halogen-free, conflict-minerals, or AEC-Q100 status. The MC1489D is a legacy RS-232 receiver rather than an automotive-qualified device, but the official current onsemi product documentation should be checked before compliance claims are used in procurement or qualification records.
