MC3488AD - Dual EIA-423/EIA-232D Line Driver | onsemi
Артикул: MC3488AD ✓ АктивенMC3488AD Обзор
A line driver is an interface circuit that converts digital logic signals into transmission-line-compatible signals for communication links. The MC3488AD belongs to the RS-232 and RS-422 interface IC category, where it provides single-ended output stages for driving external cables or receiver circuits. Compared with a general-purpose logic buffer, its purpose-built driver architecture controls edge transitions and supports the voltage, loading, and waveform requirements associated with established EIA and CCITT communication specifications.
The MC3488AD provides two driver channels in one 8-pin SOIC package, reducing the component count in designs requiring more than one transmission-channel output. Its principal documented features include adjustable slew rates from 1.0 V/µs to 100 V/µs, operation with output load resistance greater than 450 ohms, and support for EIA-423, EIA-232D, CCITT X.26, X.28, and Federal Standard FIDS1030. These characteristics make the part relevant to legacy data communications, industrial control links, and equipment interfaces that still use specified single-ended line-driver networks.
Slew-rate control is the main technical design variable. A slower edge reduces high-frequency content and ringing but increases transition time, while a faster edge supports higher data throughput at the cost of greater electromagnetic-interference potential and sensitivity to load or termination details. Because the MC3488AD permits adjustable output slew rates, the correct configuration should be selected against the cable length, data rate, receiver thresholds, grounding arrangement, and system EMC requirements rather than chosen solely from a standard data-rate label.
Typical uses include industrial serial interfaces, legacy controller peripherals, data-acquisition equipment, and communications systems that require two single-ended line-driver outputs. A board design may pair the MC3488AD with a compatible line receiver such as MC3487DR, a multi-driver interface such as MC3486DR, or a logic interface such as P82B96DR. The output network must be checked against the applicable interface standard because the presence of a compatible logic-side pinout alone does not establish complete system-level interchangeability.
When laying out the circuit, keep the output drivers close to their connector or interface-network entry points, provide a stable return path, and verify the selected slew rate against the actual load. Do not infer the complete electrical performance from the EIA references alone; supply voltage, output levels, propagation delay, input compatibility, and absolute maximum ratings must be confirmed in the manufacturer datasheet before production release.
This page consolidates the verified manufacturer-document information, exact source links, interface standards, package data, sourcing context, and drop-in comparison candidates for the MC3488AD. It also separates documented facts from values that still require schematic-level verification, helping engineers evaluate this legacy line-driver IC without relying on incomplete distributor summaries.
Аналоги без доработки для MC3488AD — тот же корпус, pin-to-pin совместимость. Компоненты в других корпусах, требующие переработки PCB, исключены.
MC3488ADG
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
UA9636ACD
✅ Прямая замена📋 Справочный аналог (нет в каталоге)
MC3488AD Характеристики
| Device Type | Dual single-ended line driver |
| Driver Channel Count | 2 |
| Supported EIA Standards | EIA-423 and EIA-232D |
| Supported CCITT Standards | X.26 and X.28 |
| Federal Standard Support | FIDS1030 |
| Adjustable Output Slew Rate | 1.0 V/us to 100 V/us |
| Minimum Output Load Resistance | Greater than 450 ohm |
| Signal Wave Shaping | Supported |
| Корпус | 8-pin SOIC |
| Число выводов | 8 |
| Тип монтажа | Surface mount |
Руководство по цоколевке MC3488AD в корпусе 8-pin soic
Цоколевка для MC3488AD (корпус 8-pin soic). Нумерация выводов, функции и схемы подключения определены в техническом описании производителя. Обратитесь к нему для точного посадочного места и рекомендаций по пайке.
Нет подробных данных о распиновке для MC3488AD.
Обратитесь к даташиту для полной конфигурации выводов.
Типичное применение
MC3488AD подходит для 6 применениеs: Legacy Industrial Serial Communication, Data-Acquisition Equipment, Legacy Controller Peripherals, RS-232 and RS-422 Equipment Interfaces, Point-to-Point Communication Links, Test and Measurement Interfaces.
Legacy Industrial Serial Communication
The MC3488AD fits legacy industrial communication links that use EIA-423 or EIA-232D single-ended signaling and require controlled output transitions. According to the onsemi MC3488A manufacturer datasheet, the device provides two driver channels, adjustable slew rates from 1.0 V/us to 100 V/us, and operation with output load resistance greater than 450 ohms. The slew rate should be selected to balance data throughput against ringing and EMI. The design must also verify supply voltage, output thresholds, operating temperature, and receiver compatibility before using the part on a new factory-control board.
Рекомендуется
Data-Acquisition Equipment
The MC3488AD can provide two controlled single-ended outputs for legacy data-acquisition equipment connected to remote sensors or laboratory modules. Its documented adjustable slew-rate range of 1.0 V/us to 100 V/us allows the transition shape to be evaluated against the installed cable, while the greater-than-450-ohm load requirement defines the minimum supported output loading described by onsemi. In practice, the two outputs should be placed near the external interface connector, with a continuous return path and validated termination. MC3487DR is a related interface-family candidate for the receiving side, not a verified drop-in substitute.
Рекомендуется
Legacy Controller Peripherals
The MC3488AD is suitable for dual-channel legacy peripheral links where the host uses a standards-based single-ended line-driver network. Its 8-pin SOIC construction helps reduce board area, while adjustable output slew rates from 1.0 V/us to 100 V/us give the designer control over edge energy on the cable. A controller such as MC1458D can serve as the digital-side signal source, but its output levels and timing must be confirmed against the driver requirements. The complete PCB must preserve the same logical channel mapping and connector polarity as the original MC3488AD implementation.
Рекомендуется
RS-232 and RS-422 Equipment Interfaces
The MC3488AD addresses equipment interfaces that combine EIA-232D or EIA-423 requirements with adjustable edge-rate control. According to the onsemi MC3488A manufacturer datasheet, it also supports CCITT X.26, X.28, and Federal Standard FIDS1030, allowing it to be considered in legacy multiprotocol equipment. The specific protocol configuration still determines voltage levels, connector wiring, grounding, and cable length, so the interface standard alone does not establish drop-in equivalence with every RS-232 or RS-422 IC. MC3486DR and MC3487DR provide related onsemi interface building blocks for evaluation.
Рекомендуется
Point-to-Point Communication Links
The MC3488AD can serve as the output stage in a point-to-point link when the receiver expects compatible single-ended levels and the line load is greater than 450 ohms. Its adjustable 1.0 V/us to 100 V/us slew rate gives engineers a way to tune transitions for a particular cable and data rate instead of accepting a fixed edge rate. A conservative implementation uses the slower end when long cables or sensitive receivers require reduced high-frequency content. Receiver thresholds, propagation delay, supply voltage, and maximum data rate remain datasheet-verification items before release.
Рекомендуется
Test and Measurement Interfaces
The MC3488AD is applicable to test and measurement equipment that must communicate with older external instruments through specified single-ended driver networks. Wave-shaping control can help tune edge rates for connected cable and receiver combinations, and the dual-channel configuration reduces the number of line-driver devices when two links are required. MC3488AD suitability still depends on the instrument's voltage levels, connector wiring, ground strategy, and data rate. The designer should preserve the original channel mapping and validate emissions and immunity in the final enclosure rather than relying on component compatibility alone.
Рекомендуется
Сводка рекомендуемых товаров
Справочные инженерные данные для MC3488AD — сравнение, рекомендации по проектированию и информация о соответствии.
Руководство по выбору
Сравнение с аналогами
| Параметр | Этот товар | MC3488ADG | UA9636ACD |
|---|---|---|---|
| Package | 8-pin SOIC | 8-pin SOIC | 8-pin SOIC |
| Brand | onsemi | onsemi | Texas Instruments |
| Device Type | Dual single-ended line driver | MC3488A family dual line driver | Dual interface driver |
| Driver Channel Count | 2 | 2 | 2 |
Ключевые отличия
- Wide adjustable slew-rate range (против UA9636ACD)
- Explicit multi-standard support (против UA9636ACD)
- Two single-ended driver channels in 8-pin SOIC (против UA9636ACD)
Заметки по проектированию
Select the output slew rate against the complete channel rather than by data rate alone. The onsemi MC3488A manufacturer datasheet documents an adjustable range of 1.0 V/us to 100 V/us, while requiring an output load resistance greater than 450 ohms. Start with the slower end for long or capacitive cables when reducing edge-related ringing is important, then increase it only after checking receiver thresholds, reflections, EMC emissions, and inter-symbol interference.
Place the MC3488AD close to the cable or connector entry point, and keep each output trace short and away from sensitive analog or high-speed digital nodes. Provide a continuous interface-ground return path and avoid sharing long return segments with switching-power currents. The available sources confirm an 8-pin SOIC package but do not provide a complete numbered pinout, so the PCB footprint and every net assignment must be checked directly against the official datasheet before fabrication.
Do not treat every 8-pin SOIC line-driver IC as a drop-in replacement. The supplied comparison identifies the Texas Instruments UA9636ACD as similar but states that some electrical characteristics differ, while MC3487DR is a related family member rather than a verified substitute. For any proposed replacement, compare pin names, input thresholds, supply voltage, output levels, slew rate, propagation delay, capacitive-load behavior, temperature range, and power dissipation rather than relying on package dimensions alone.
Slew rate is an important EMC control because fast edges contain more high-frequency energy. If the installation produces emissions or fails immunity testing, reduce the configured transition rate, verify the cable termination and load, and inspect grounding and return-current paths. The MC3488AD's documented 1.0 V/us to 100 V/us adjustment gives meaningful optimization range, but final compliance must be established with the complete product cable, enclosure, connector, and power-supply configuration.
Информация о соответствии
The supplied verified search results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer or distributor pages.