MC3487D - 4-Channel RS-422 Driver | Texas Instruments | 5V
Référence : MC3487D ⚠ Dernier achatMC3487D Présentation
A differential line driver is an interface IC that converts a single-ended logic signal into a balanced pair of differential signals. In the hierarchy of electronic components, it belongs to the interface IC family, within communication and transceiver devices. Differential signaling improves noise immunity by rejecting common-mode noise and allows reliable data transmission over longer cable runs than ordinary single-ended digital logic.
The MC3487D provides four driver channels rather than a full transceiver, so it does not receive differential data. The output-enable function controls the output state, allowing connected drivers to be disabled when they are not active. This is useful in systems that share a bus or require controlled output states. Power-up and power-down protection are also identified in the manufacturer documentation.
Typical uses include industrial RS-422 links, data acquisition systems, test equipment, instrumentation, and multi-channel communication links. The 5 V supply operation simplifies interface design in legacy and industrial systems where the host logic uses a 5 V rail. Because it is a driver-only device, the system designer must provide the receiving circuitry and define cable termination, grounding, and enable-control behavior.
The main design considerations are signal integrity, cable length, supply decoupling, and output-state control. Differential pairs should be routed with consistent geometry and appropriate grounding. The output-enable signals should be controlled during reset so that multiple channels do not contend on a shared bus. The device is intended for surface-mount assembly in the 16-pin SOIC package.
Alternatives de remplacement direct pour MC3487D — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
MC3487NS
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
DS34C87TM/NOPB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AM26LS31CDR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC3486DR
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC3487D Spécifications
| Product Type | Quadruple differential line driver |
| Number of Drivers | 4 |
| Tension d'alimentation | 5 V single supply |
| Supply Voltage Range | 4.75 V to 5.25 V |
| Interface Standard | ANSI TIA/EIA-422-B and ITU Recommendation V.11 |
| Input Compatibility | TTL-compatible buffered input |
| Output State | 3-state, high-impedance output |
| Transition Time | Fast transition time |
| Input Type | High-impedance input |
| Protection | Power-up and power-down protection |
| Température de fonctionnement | 0 C to 70 C |
| Boîtier | 16-pin SOIC, 0.154 inch body width, 3.90 mm |
| Type de montage | Surface mount |
| Protocol | RS-422 |
| Driver Configuration | 4/0 |
Guide de configuration des broches du MC3487D 16-pin soic, 0.154 inch body width, 3.90 mm
Configuration des broches du MC3487D (boîtier 16-pin soic, 0.154 inch body width, 3.90 mm). La numérotation des broches, les fonctions et les schémas de connexion sont définis dans la fiche technique du fabricant. Consultez-la pour l'empreinte exacte et les directives de soudage.
Aucune donnée de brochage détaillée disponible pour MC3487D.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MC3487D convient pour 6 applications: Industrial RS-422 Data Links, Test and Measurement Systems, Data Acquisition and Control, Instrumentation and Signal Distribution, Legacy Computer Peripheral Interfaces, Communication Equipment.
Industrial RS-422 Data Links
The MC3487D fits industrial point-to-point or multidrop RS-422 links because it combines four independent differential drivers, TTL-compatible buffered inputs, and tri-state outputs in one 16-pin SOIC. It operates from 4.75 V to 5.25 V, allowing it to share a conventional 5 V logic rail while driving balanced cable pairs. The ANSI TIA/EIA-422-B and ITU V.11 design focus supports robust signaling over cable runs when the receiver, termination, grounding, and cable length are correctly designed. The key limitation is its 0 C to 70 C listed operating range, so it is more appropriate for indoor or temperature-controlled equipment than uncured industrial environments.
Recommandé
Test and Measurement Systems
The MC3487D is useful in test and measurement equipment that distributes control or status signals over several balanced channels. Its four-driver architecture reduces the number of separate interface devices needed for a multi-channel fixture, while the tri-state outputs provide a controlled high-impedance state when a channel is inactive. The 5 V single-supply requirement matches many legacy TTL-based test systems. Designers should use short, properly terminated differential routes where appropriate and account for the device's listed 0 C to 70 C temperature range when constructing rack-mounted or portable equipment.
Recommandé
Data Acquisition and Control
The MC3487D can provide transmit-side differential signaling in data-acquisition and industrial-control systems where several sensor, instrument, or controller nodes require a common RS-422 interface. Four independent channels allow one package to support parallel command or control links, and the buffered TTL-compatible inputs reduce loading on the driving logic. Because MC3487D has four drivers but no receivers, each physical channel still requires a receiver device at the destination. Cable shielding, common-mode grounding, termination strategy, and isolation should be selected from the actual data rate and cable environment.
Recommandé
Instrumentation and Signal Distribution
The MC3487D is appropriate for instrumentation signal-distribution boards that transmit multiple differential control signals between a controller and remote instrument. Its four independent driver channels and 5 V operating range make it convenient for systems built around TTL-compatible logic, while tri-state outputs can support controlled bus management. The driver does not perform analog conditioning or receive data, so it should be placed alongside receiver circuitry rather than used as a complete signal chain. Verify edge-rate requirements, cable length, and termination against the official datasheet before establishing a production interface.
Recommandé
Legacy Computer Peripheral Interfaces
The MC3487D can support legacy computer peripheral and industrial backplane interfaces that use 5 V TTL signaling converted to differential RS-422. Its buffered inputs reduce the load placed on the source logic, and its four channels support several links from a single interface package. The device is particularly relevant when an existing design already uses a 16-pin SOIC footprint and the required logic levels are compatible. Engineers should not substitute a modern low-voltage transceiver without checking supply voltage, input thresholds, output enable polarity, and timing.
Recommandé
Communication Equipment
The MC3487D is suitable for communication equipment requiring several balanced transmit channels over a 5 V logic supply. Its differential outputs are intended for ANSI TIA/EIA-422-B and ITU Recommendation V.11 interfaces, and the high-impedance output state helps when multiple channels must be selectively enabled. The part is a driver, not a complete transceiver, so receiver packages, connectors, protection devices, and cable termination must be added at the system level. The listed commercial operating range of 0 C to 70 C should be checked against the enclosure and deployment environment.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC3487D — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC3487NS | DS34C87TM/NOPB | AM26LS31CDR | MC3486DR |
|---|---|---|---|---|---|
| Package | 16-pin SOIC | SOIC-16 | SOIC-16 | SOIC-16 | SOIC-16 |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
Principaux différenciateurs
- Four-channel driver concentration (vs AM26LS31CDR)
- TTL-compatible buffered inputs (vs DS34C87TM/NOPB)
- Single 5 V supply operation (vs MC3486DR)
- Tri-state differential outputs (vs MC3487NS)
Notes de conception
Route each differential output pair as a pair with consistent geometry and minimize stubs. Keep the return path and grounding arrangement controlled, especially when the cable leaves the board. Differential signaling reduces susceptibility to common-mode noise, but poor pair geometry or an unsuitable ground reference can still reduce margin. Confirm the final layout against the system cable and connector requirements.
Place the 5 V supply bypass capacitor close to the device supply pins and provide a low-impedance ground return. The verified operating range is 4.75 V to 5.25 V, so the source and distribution network should remain within that range under transient load. Do not infer the required capacitor value or power dissipation from the supplied data; verify those values against the official datasheet and board-level noise requirements.
Do not treat MC3487D as a complete RS-422 transceiver. It has four drivers and no receivers, so the receiving endpoint requires separate circuitry. Also verify enable polarity and timing before connecting outputs to shared equipment. A mechanically similar SOIC-16 device can have different pin functions, supply limits, or output-enable logic and therefore may not be a true drop-in replacement.
Informations de conformité
The supplied verified data confirms RS-422-related interface requirements but does not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. Compliance must be confirmed with the current manufacturer product documentation.
