MC1488MG - Quad EIA-232D Driver | onsemi | RS-232
料号： MC1488MG ✓ 量产中MC1488MG 概述
An RS-232 line driver is an interface IC that converts digital logic-level signals into unbalanced, bipolar voltage levels suitable for serial data links. Within the signal-chain hierarchy, it belongs to the RS-232 interface-driver family, combines with an RS-232 receiver to form a complete communications path, and ultimately provides the physical-layer function required between data terminal equipment and data communications equipment. Unlike a transceiver, the MC1488MG provides four driver channels and no receiver channels.
The primary verified characteristics are four independently available line-driver outputs, EIA-232D conformance, typical current limiting of ±10 mA, a 14-pin SOIC package with gull-wing leads, and a commercial extended temperature grade. The output current limit protects the driver stage when a connected RS-232 line is shorted or misconfigured. Because four transmit channels are provided, one device can support four RS-232 outputs while reducing the number of external line-driver packages required.
The MC1488MG is intended for legacy and industrial serial-control equipment where EIA-232D signaling remains required. Appropriate uses include multi-port controller interfaces, equipment test systems, point-to-point serial links, and control panels. The device requires suitable bypass capacitance and careful grounding because the implemented system also depends on cable characteristics, receiver thresholds, protection networks, and the voltage levels allowed by the selected RS-232 endpoint.
For new designs, engineers should verify signal polarity, baud rate, logic thresholds, and electrical limits against the current manufacturer datasheet before layout release. The supplied search results confirm the EIA-232D driver function, four-output organization, ±10 mA typical output current, and 14-pin SOIC format, but several detailed timing, voltage, temperature, and absolute-maximum values were not included in the retrieved records.
This page combines verified distributor and manufacturer-linked information, structured technical context, pin-compatible replacement guidance, and practical sourcing notes. It also separates confirmed electrical facts from parameters that require datasheet verification, helping engineers avoid assigning unsupported specifications to this legacy-compatible RS-232 interface device.
直接替换替代料： MC1488MG ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
MC1488M
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →MC1488D
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →SN75188NSR
✅ 直接替换📋 参考替代料（不在目录中）
SN75C188DR
✅ 直接替换📋 参考替代料（不在目录中）
SN75188
✅ 直接替换📋 参考替代料（不在目录中）
MC1488MG 规格参数
| Device Type | Quad line driver |
| RS-232 Standard | EIA-232D |
| Driver Channel Count | 4 channels |
| Receiver Channel Count | 0 channels |
| 输出配置 | 4/0 driver configuration |
| Typical Output Current | ±10 mA |
| Output Current Limiting | Yes |
| Package Type | 14-pin SOIC |
| Lead Form | Gull wing |
| 安装类型 | Surface mount |
| Temperature Grade | Commercial extended |
MC1488MG 14-pin soic 引脚配置指南
MC1488MG（14-pin soic 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： MC1488MG.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC1488MG 适用于 6 应用s: Legacy RS-232 Control Interfaces, Multi-Port Serial Equipment, Point-to-Point Data Terminal Equipment, Industrial Instrument Communication, Test and Measurement Systems, Board-to-Board Legacy Serial Links.
Legacy RS-232 Control Interfaces
The MC1488MG fits equipment that requires four dedicated EIA-232D transmit outputs, such as a controller communicating with legacy peripherals. Its four-driver organization allows one 14-pin SOIC to replace four separate single-channel driver functions, while the verified ±10 mA typical current-limited output characteristic addresses line-fault conditions. The designer should still verify logic thresholds, supply voltage, and timing in the current datasheet, because those values were not included in the retrieved records. In a practical implementation, place the device close to the board edge, route each driver output to its connector through the intended protection network, and keep the RS-232 signal ground reference compatible with the connected equipment.
推荐
Multi-Port Serial Equipment
The MC1488MG is suitable for multi-port equipment that requires several RS-232 output channels but does not need onboard receive channels. Four drivers in one 14-pin SOIC can reduce board area compared with four separate single-driver packages, while preserving the established EIA-232D interface function. The current-limited ±10 mA typical outputs are particularly relevant when the cable or connected equipment presents a fault condition. Before layout, confirm that the logic polarity of all four channels matches the host controller and that the unused outputs are handled exactly as directed by the manufacturer datasheet. Connector spacing, ground routing, and protection components remain system-level constraints that the IC cannot solve by itself.
推荐
Point-to-Point Data Terminal Equipment
The MC1488MG can serve as the transmitting side of an EIA-232D point-to-point link between data-terminal equipment and data-communications equipment. Its monolithic four-driver construction supports systems with multiple independently controlled serial outputs, while the 14-pin gull-wing SOIC package supports conventional surface-mount assembly. The verified output current of ±10 mA typical provides the principal quantified electrical characteristic for initial design review. Engineers must still confirm operating voltage, input logic levels, slew behavior, propagation delay, and maximum data rate against the manufacturer document before establishing a baud-rate target. Cabling, connector pin assignment, grounding, and protection should be validated together because the driver alone does not define the complete RS-232 channel.
推荐
Industrial Instrument Communication
The MC1488MG can be evaluated for industrial instruments that retain an RS-232 command port and require several transmit outputs. The commercial extended temperature-grade designation makes it a candidate for equipment operating beyond ordinary commercial conditions, but the exact numerical limits were not present in the supplied data and must be confirmed before release. Its four independent channels help consolidate outbound command paths, and the ±10 mA typical current limiting provides a defined characteristic for preliminary fault-current planning. The design should include board-level transient protection, a controlled ground reference, and sufficient separation from switching converters. Engineers should also review the complete datasheet for supply sequencing, input tolerances, and channel behavior during power-up before treating the device as production-ready for a new industrial platform.
推荐
Test and Measurement Systems
The MC1488MG is applicable in test and measurement systems that must send commands or control signals over multiple RS-232 outputs. Four driver channels allow a single package to support distinct ports while maintaining the EIA-232D signaling expected by older test equipment. The current-limited output rating of ±10 mA typical is useful during initial fault analysis, but it should not be interpreted as a complete protection-network specification. The circuit designer should verify the actual driver output voltage and timing before defining cable lengths or data rates. Use short, properly referenced routes from the SOIC to the connector, and include the external protection and termination components required by the overall interface architecture. A scope measurement at the connector is preferable to assuming ideal behavior at the IC pin.
推荐
Board-to-Board Legacy Serial Links
The MC1488MG can be used in a legacy board-to-board serial arrangement where the transmitter and receiver are separated and EIA-232D levels are required across the interconnect. The four-channel structure provides flexibility when one controller must distribute several command or status lines to another board. Although the device is physically a 14-pin SOIC, designers must not assume that every legacy MC1488 board can accept the MC1488MG without checking the package drawing and pin names. Logic polarity, startup behavior, output impedance, and connector ground references also require datasheet verification. For a dependable implementation, route driver outputs away from sensitive analog sections, use a single consistent reference-ground strategy, and validate the complete channel with the intended receiver and cable.
推荐
推荐产品汇总
工程参考数据： MC1488MG ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC1488M | MC1488D | SN75188NSR | SN75C188DR | SN75188 |
|---|---|---|---|---|---|---|
| Brand | onsemi | onsemi | onsemi | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC | 14-pin SOIC |
| Product Type | Quad line driver | Quad line driver | Quad line driver | RS-232 interface driver candidate | RS-232 interface driver candidate | Quad RS-232 line driver |
| Standard | EIA-232D | EIA-232D | EIA-232D | RS-232 family | RS-232 family | RS-232 driver family |
| Lead Form | Gull wing | Gull wing | Gull wing | Surface-mount leads | Surface-mount leads | Package-dependent |
关键差异点
- Four independent transmit outputs in one 14-pin package （对比 Single-channel RS-232 driver)
- Verified EIA-232D and current-limited output characteristics （对比 General-purpose logic-output driver)
- Commercial extended temperature-grade positioning （对比 SN55188 military-temperature option)
- Quad-only driver simplifies transmit-side partitioning （对比 Combined RS-232 transceiver)
设计说明
Do not assume that a shared RS-232 package name guarantees a drop-in replacement. Before substituting MC1488M, MC1488D, SN75188NSR, SN75C188DR, or SN75188, compare the actual 14-pin drawing, every signal name, supply requirements, input thresholds, output levels, temperature range, and package dimensions. The retrieved comparison results identify candidates but do not provide complete electrical tables.
Place the MC1488MG near the RS-232 connector and route the four driver outputs directly toward the protected connector paths. Keep the device ground and signal-ground arrangement consistent with the system grounding strategy, and avoid routing driver outputs beneath sensitive analog circuitry. Verify the manufacturer's recommended bypass requirements and pin-specific layout guidance because those details were not included in the supplied excerpts.
The verified output-current value of ±10 mA typical is an output characteristic, not the complete device power rating. Before applying a supply rail, confirm the allowed input range, quiescent current, output voltage, and absolute maximum ratings in the manufacturer datasheet. Also check whether connector-side protection components can inject current into the driver outputs; external protection must be selected so that normal fault behavior remains within the device limits.
RS-232 driver edges can couple into nearby circuits even when the data rate is moderate. Use the shortest practical output routes, maintain a deliberate ground reference, and consider connector-side protection only after checking its capacitance and clamping behavior. Because maximum data rate, slew rate, and output-voltage limits were not present in the verified excerpts, those values must be established before defining cable length or EMI margins.
合规信息
The supplied records do not contain explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. AEC-Q100 is not applicable to this commercial-grade interface IC because no automotive qualification was identified.