MC33199D - ISO 9141 Automotive K-Line Interface | NXP
Référence : MC33199D ✗ Fin de vieMC33199D Présentation
An ISO 9141 interface is a dedicated diagnostic communication interface within the broader automotive network. ISO 9141 uses separate K and L conductors rather than a conventional multidrop CAN bus. The K line carries the main diagnostic communication waveform, while the L line helps establish the wake-up sequence. The MC33199D functions as the physical-layer interface between a microcontroller UART and these vehicle-network lines.
Key specifications include 1 driver and 1 receiver, a 4.5 V to 5.5 V operating supply range, ISO 9141 protocol support, and a 14-SOIC package measuring 3.90 mm wide. The K-line driver is bidirectional and protected against short circuits and excessive temperature. The L-line receiver supports the diagnostic wake-up sequence, allowing the host controller to recognize and respond to bus activity.
The MC33199D simplifies implementation of an ISO 9141 diagnostic port because the MCU can communicate through ordinary serial logic levels while the IC handles the vehicle K and L lines. Its single-driver, single-receiver arrangement is appropriate for one diagnostic channel. Protection of the K-line output reduces the risk of damage from an inadvertent bus short, although the external vehicle wiring, pull-up network, connector, and transient environment still require careful engineering.
Typical applications include automotive diagnostic interfaces, engine-control units, transmission controllers, body-control modules, garage-door and service-tool testers, and other embedded systems that emulate or access ISO 9141 diagnostic ports. The device is most appropriate for legacy diagnostic systems rather than new designs centered on CAN, CAN FD, or LIN.
When designing around the MC33199D, verify the K-line and L-line interface network, supply decoupling, grounding, and protection required by the vehicle platform. The 5 V supply range excludes direct 3.3 V operation. Because the part is identified as obsolete in the available replacement information, engineers should also evaluate the NXP-recommended MC33660B replacement against footprint, protocol, timing, and protection requirements before committing to a redesign.
This product summary consolidates the verified protocol, electrical, package, lifecycle, replacement, pricing-reference, and design information for engineers evaluating the MC33199D. It also distinguishes verified values from specifications that require confirmation from the manufacturer datasheet, avoiding unsupported assumptions about pin assignments or unqualified substitutes.
Alternatives de remplacement direct pour MC33199D — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
MC33199
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC33199D Spécifications
| Product Type | Automotive ISO 9141 serial interface circuit |
| Protocol | ISO 9141 |
| Number of Drivers | 1 |
| Number of Receivers | 1 |
| Driver Type | Bidirectional K-line driver |
| Receiver Function | L-line receiver for ISO 9141 wake-up sequence |
| Supply Voltage Range | 4.5 V to 5.5 V |
| Boîtier | 14-SOIC |
| Package Width | 3.90 mm |
| Package Length | 0.154 inch |
| Type de montage | Surface mount |
| Packaging | Cut tape |
| Short-Circuit Protection | Protected on the K-line driver |
| Over-Temperature Protection | Yes |
Guide de configuration des broches du MC33199D 0.154 inch
Configuration des broches du MC33199D (boîtier 0.154 inch). 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 MC33199D.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
MC33199D convient pour 6 applications: Automotive Diagnostic Interfaces, Engine Control Unit Diagnostics, Vehicle Service Diagnostic Tools, Body Control Module Diagnostics, Transmission Controller Diagnostics, Industrial Legacy Vehicle Test Equipment.
Automotive Diagnostic Interfaces
The MC33199D fits legacy ISO 9141 diagnostic interfaces that connect a vehicle microcontroller to the K and L lines of a service connector. Its bidirectional K-line driver carries the principal diagnostic waveform, while the L-line receiver supports the wake-up sequence. The verified 4.5 V to 5.5 V supply range requires a regulated 5 V rail, and the 14-SOIC package simplifies integration with existing 5 V automotive controller boards. Because the part is obsolete, new production designs should first compare it with the NXP-recommended MC33660B and verify that the replacement footprint and electrical behavior satisfy the complete interface design.
Recommandé
Engine Control Unit Diagnostics
The MC33199D can provide the ISO 9141 physical interface within an engine-control unit or legacy powertrain controller. The microcontroller drives and receives diagnostic signals through the K line, while the L receiver detects the established wake-up condition before communication begins. Its 4.5 V to 5.5 V operating range suits regulated 5 V control electronics, and the K-line driver includes short-circuit and over-temperature protection. In a safety- or lifecycle-sensitive production program, engineers should confirm automotive qualification, temperature limits, diagnostic timing, and the suitability of the NXP-recommended MC33660B before new design entry.
Recommandé
Vehicle Service Diagnostic Tools
The MC33199D is applicable to service equipment that emulates or communicates with an ISO 9141 vehicle diagnostic port. It isolates the host controller from the K and L conductors through a dedicated interface IC and provides a bidirectional K-line driver with short-circuit and thermal protection. The 5 V supply requirement means the tester must provide a regulated 4.5 V to 5.5 V source for this circuit section. For newly designed tools, the MC33660B should be evaluated as the NXP-recommended replacement, with package, pin mapping, electrical thresholds, and wake-up behavior verified against the target vehicle protocols.
Recommandé
Body Control Module Diagnostics
The MC33199D can support an ISO 9141 diagnostic connection in a body-control module or other distributed automotive controller. The device provides one bidirectional K-line driver and one L-line receiver, allowing the module microcontroller to participate in the vehicle wake-up and diagnostic exchange sequence. Protection against K-line short circuits and excessive driver temperature improves robustness, although vehicle-level transient requirements still govern external circuitry. The 14-SOIC package fits established controller layouts, but an obsolete designation makes supply assurance important. For new platforms, compare the MC33660B and verify that its package and pin requirements permit a straightforward redesign.
Recommandé
Transmission Controller Diagnostics
The MC33199D is suitable for legacy transmission electronics that expose an ISO 9141 diagnostic port to service equipment. The interface separates the controller's serial signaling from the physical K and L vehicle lines, while the bidirectional K-line driver supports both transmitting and receiving diagnostic messages. The L receiver participates in the wake-up sequence, helping the controller transition from a low-power state when appropriate bus activity is detected. The regulated 5 V supply requirement and 14-SOIC footprint favor retrofitting existing designs. For new transmission-control platforms, engineers should assess MC33660B and verify every pin and timing requirement rather than assuming a literal drop-in conversion.
Recommandé
Industrial Legacy Vehicle Test Equipment
The MC33199D can be used in test and diagnostic equipment designed for legacy vehicles that still employ ISO 9141. The interface gives a controller access to the K and L diagnostic conductors, with the K driver handling bidirectional signaling and the L receiver supporting wake-up detection. Its 4.5 V to 5.5 V supply range is compatible with conventional 5 V test-system logic, and the 14-SOIC package is convenient for existing boards. Because the verified source identifies the MC33199D as obsolete, equipment manufacturers should qualify the NXP-recommended MC33660B for new products and maintain MC33199D only where PCB continuity and genuine component traceability justify it.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC33199D — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC33199 |
|---|---|---|
| Product Type | ISO 9141 serial interface circuit | ISO 9141 serial interface circuit |
| Brand | NXP | NXP |
| Package | 14-SOIC | 14-SOIC |
| Protocol | ISO 9141 | ISO 9141 |
| Number of Drivers | 1 | 1 |
| Number of Receivers | 1 | 1 |
| Supply Voltage Range | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Driver Function | Bidirectional K-line driver | Bidirectional K-line driver |
| Receiver Function | L-line receiver for wake-up sequence | L-line receiver for wake-up sequence |
| Short-Circuit Protection | Yes, on K-line driver | Yes, on K-line driver |
Principaux différenciateurs
- Integrated ISO 9141 physical interface (vs MC33199)
- Protected automotive K-line output (vs MC33199)
- Defined 5 V operating range (vs MC33199)
Notes de conception
Do not treat MC33660B as a confirmed pin-for-pin substitute solely because NXP community guidance identifies it as the replacement for MC33199D. Download the applicable device datasheets and compare package dimensions, pin mapping, supply limits, K-line and L-line thresholds, driver topology, wake-up timing, and protection behavior. The supplied evidence confirms replacement intent but does not establish identical footprint compatibility.
The MC33199D requires a 4.5 V to 5.5 V supply, so a 3.3 V MCU cannot power it directly without an appropriate interface or level-shifting arrangement. Place the device's supply decoupling close to its VDD and ground pins, maintain a low-impedance return path, and verify supply tolerance during vehicle cranking and transient conditions. Voltage limits not stated in the verified excerpts must be confirmed from the manufacturer datasheet.
Route the K and L connections away from sensitive MCU signals and keep the external interface network close to the IC and connector. Use a ground plane without excessive splitting beneath the device, minimize loop area in the bus path, and apply the manufacturer's recommended pull-up or termination values. Because the exact reference circuit and pinout were not included in the verified data, consult the datasheet before finalizing component values or trace geometry.
The verified K-line driver includes short-circuit and over-temperature protection, but protection does not eliminate thermal design and layout responsibility. Check the worst-case driver dissipation under sustained fault conditions, maintain copper area around the 14-SOIC leads and exposed thermal pathways if specified, and confirm the device temperature rating from the datasheet. The available data does not provide thermal resistance or maximum junction temperature, so those values must not be assumed.
Informations de conformité
The supplied verified excerpts establish an ISO 9141 automotive diagnostic interface and protected K-line operation but do not provide verified RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations. These fields remain unknown rather than being inferred from the application's automotive use.
