MCZ33990EF - Enhanced Class B Serial Transceiver 8-SOIC | NXP
Référence : MCZ33990EF ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.15 | $2,15 |
| 10 | $1.92 | $19,20 |
| 100 | $1.71 | $171,00 |
| 500 | $1.54 | $770,00 |
| 1 000 | $1.38 | $1 380,00 |
MCZ33990EF Présentation
A Class B serial transceiver is a category of single-wire automotive network interface that combines a differential-mode driver, a wave-shape comparator, a noise-tolerant receiver, and an internal voltage regulator into one IC. Its role in the broader system hierarchy runs: transceiver -> serial interface IC -> automotive communication IC -> power and signal management -> semiconductor. By collapsing the physical layer onto a single bus wire, it eliminates the harness cost of dedicated signal-return pairs in body-control modules, door-modules, mirror switches, and seat controllers.
Key differentiating features of the MCZ33990EF include its 9 V to 16 V wide supply tolerance that directly accepts the automotive 12 V battery rail without external regulation, internal protection against load-dump and reverse-battery transients typical of vehicle electrical systems, an integrated 5 V regulator for slave-node supply, and built-in diagnostic functions for bus-fault detection. The device meets ISO 9141 / Class B timing requirements, so it interoperates with other manufacturers' compliant transceivers.
Architecturally, the MCZ33990EF uses a bipolar-CMOS-DMOS process that allows the high-side driver, low-side driver, and 5 V LDO to coexist on a single die. Compared with discrete MOSFET-and-op-amp implementations, this integration removes roughly ten external components and the associated PCB area, while the part's specified bus-fault tolerance shorts the troubleshooting loop in qualification.
Typical applications include body control modules, instrument cluster data links, HVAC control panels, seat and mirror switch nodes, and remote lamp-driver interfaces. In all of these use cases, the Class B bus replaces several dedicated signal wires, reducing wiring-harness weight and cost.
When laying out the PCB, keep the bus pin trace short and route it away from switching power stages, since the transceiver's receiver threshold is in the millivolt range and is susceptible to injected common-mode noise. Decouple VCC with a 100 nF ceramic placed within 2 mm of the supply pin to keep the internal regulator stable during load-dump events. This page synthesizes distributor pricing, parametric drop-in alternatives, and PCB design notes that go beyond the manufacturer datasheet excerpts.
Alternatives de remplacement direct pour MCZ33990EF — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MCZ33990EFR2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC33990DR2
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC33990D
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC33990EF
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
MCZ33990EF Spécifications
| Fonction | Class B Serial Transceiver |
| Protocol | Class B / ISO 9141 single-wire |
| Number of Transmitters | 1 |
| Number of Receivers | 1 |
| Débit de données | 10.4 kbps (max) |
| Supply Voltage - Operating | 9 V to 16 V |
| Boîtier / Format | 8-SOIC (0.154", 3.90 mm body) |
| Type de montage | Surface Mount |
| Nombre de broches | 8 |
| Package Code | SOP |
| Terminal Form | Gull Wing |
| Temperature Grade | Automotive (AEC-Q100) |
| Bus Fault Tolerance | Load-dump and reverse-battery tolerant |
| Integrated Protection | Load-dump, reverse battery, thermal shutdown |
Configuration des broches de MCZ33990EF
| Broche 1 | VCC — Battery supply input (9 V to 16 V) |
| Broche 2 | TX — Transmit data input from MCU |
| Broche 3 | RX — Receive data output to MCU |
| Broche 4 | EN — Enable / sleep mode control |
| Broche 5 | GND — Ground |
| Broche 6 | BUS — Single-wire Class B bus pin |
| Broche 7 | VREG5V — Internal 5 V regulator output for slave-node supply |
| Broche 8 | NC — Not connected (per datasheet) |
Applications typiques
MCZ33990EF convient pour 6 applications: Automotive Body Control Module (BCM), HVAC Control Panel, Door-Mirror and Seat-Memory Switch Nodes, Remote Lamp-Driver Interface, Instrument-Cluster Data Link to Body Controller, Dashboard Switch Bank Interface.
Automotive Body Control Module (BCM)
Why MCZ33990EF fits BCM: as the single-wire Class B transceiver at each switch node, it operates from 9 V to 16 V direct from the 12 V battery, holding regulation across cold-crank and load-dump transients. Its integrated load-dump and reverse-battery protection removes the external TVS array that discrete LIN interfaces typically need. Used with a master MCU polling mirror, seat, and lamp switches, it lets designers replace a four-wire harness per door with a two-wire Class B bus. Trade-off: 10.4 kbps data rate is far below LIN or CAN-FD, so designs with many sensors should consider LIN or CAN-FD migration.
Recommandé
HVAC Control Panel
Why MCZ33990EF fits HVAC panels: the panel needs to report switch and potentiometer position back to the body controller over a slow serial bus, exactly the speed class Class B was built for. The 8-SOIC body is small enough to fit behind rotary knobs, and the 12 V supply tolerance matches the HVAC control head's wiring. Placed between the panel harness and the local MCU, it replaces dedicated ground-return wires with a single bus; no external 5 V regulator is needed because the IC has an internal LDO. Trade-off: switch debouncing must be done in firmware, since Class B does not include a dedicated debounce filter.
Recommandé
Door-Mirror and Seat-Memory Switch Nodes
Why MCZ33990EF fits mirror / seat nodes: these small remote nodes are the canonical Class B use case - low data rate, single wire back to the body controller, and small 8-SOIC footprint that fits next to the mirror motor driver ASIC. The 9 V to 16 V tolerance accepts the vehicle's full electrical envelope, and the built-in reverse-battery protection defends against technician mis-wiring during service. Compact PCB layout is straightforward because the part requires only four external components: VCC bypass, bus pull-up, and two ESD clamps.
Recommandé
Remote Lamp-Driver Interface
Why MCZ33990EF fits lamp-driver interfaces: a single-wire Class B bus is the simplest way to drive front, rear, and corner lamps without dedicated PWM wires running back to the BCM. The MCZ33990EF's diagnostic outputs let the master detect open-circuit loads - helpful for running-lamp failure messages in instrument clusters. Used at the lamp-driver slave node, it accepts 12 V directly and survives load-dump. Trade-off: lamp-driver slew rate still relies on the master MCU's start-of-frame timing.
Recommandé
Instrument-Cluster Data Link to Body Controller
Why MCZ33990EF fits cluster-BCM links: the cluster needs a low-speed link to read dimmer, mileage, and indicator status from the BCM without competing with CAN traffic; Class B offloads these signals to a dedicated 10.4 kbps bus. The 8-SOIC part fits on the cluster main board beside the gauge drivers, accepts the same 12 V, and provides the noise immunity of a defined Class B threshold. Trade-off: in networks already using CAN, an extra Class B bus can become redundant; designers sometimes consolidate to CAN-FD instead.
Recommandé
Dashboard Switch Bank Interface
Why MCZ33990EF fits dashboard switch banks: a long row of rocker switches (lighting, fog, defrost) is exactly the application where Class B saves the most harness, because one bus wire replaces dozens of switch-sense return lines. The IC runs from 9 V to 16 V and tolerates the under-dash thermal environment. Placed at the switch bank, it aggregates switch closures into serial frames for the BCM. Trade-off: multi-position rotary encoders are out of scope at 10.4 kbps; for those, LIN or CAN-FD is preferred.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MCZ33990EF — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MCZ33990EFR2 | MC33990DR2 | MC33990D | MC33990EF |
|---|---|---|---|---|---|
| Package | 8-SOIC (3.90 mm) | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors (Freescale legacy) | NXP Semiconductors (Freescale legacy) | NXP Semiconductors |
| Supply Voltage | 9 V to 16 V | 9 V to 16 V | 9 V to 16 V | 9 V to 16 V | 9 V to 16 V |
| Data Rate | 10.4 kbps | 10.4 kbps | 10.4 kbps | 10.4 kbps | 10.4 kbps |
| Transceivers (Tx / Rx) | 1 / 1 | 1 / 1 | 1 / 1 | 1 / 1 | 1 / 1 |
| Automotive Qualification | AEC-Q100 | AEC-Q100 | AEC-Q100 (legacy Freescale) | AEC-Q100 (legacy Freescale) | AEC-Q100 |
| Lifecycle | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) |
| Bus Fault Protection | Load-dump + reverse-battery | Load-dump + reverse-battery | Load-dump + reverse-battery | Load-dump + reverse-battery | Load-dump + reverse-battery |
| Packaging Form | Tape & reel (EF suffix) | Tape & reel (EFR2 = 2500 pcs) | Tape & reel (DR2 = 2500 pcs) | Tray / tube (D) | Tape & reel (2500 pcs) |
Principaux différenciateurs
- Original enhanced Class B silicon with 9 V to 16 V supply tolerance (vs MC33990DR2)
- Single-reel and tray variants share pinout exactly (vs MC33990D vs MCZ33990EFR2)
- Integrated load-dump and reverse-battery protection (vs Discrete MOSFET + op-amp)
- AEC-Q100 qualified at the IC level (vs Generic industrial transceiver)
Notes de conception
Keep the BUS pin trace as short as possible (less than 50 mm) and route it away from switching converters, because the Class B receiver threshold sits in the millivolt range and is sensitive to common-mode injection. Place the 100 nF VCC bypass within 2 mm of the supply pin to keep the internal 5 V regulator stable during load-dump events. Reference: Freescale/NXP MCZ33990 datasheet typical application diagram.
The internal 5 V regulator supplies the slave-node MCU. Estimated: if the slave MCU draws 25 mA and the BUS wire drops 0.5 V, the input-to-output headroom of the internal LDO must exceed 4.5 V. Confirm the headline 5 V regulator current capability in the datasheet before designing with stacked loads. Always specify the lowest-cost discrete LDO back-up on the schematic.
Do NOT use the MCZ33990EF as a drop-in replacement for the TJA1027 (LIN) or TJA1050 (CAN) - the MCZ33990EF implements the Class B / ISO 9141 single-wire protocol, not LIN or CAN. Pin functions differ; substituting risks permanent damage to the bus and the master MCU. If migration to LIN or CAN-FD is required, the entire IC and MCU firmware must be redesigned.
Informations de conformité
AEC-Q100 automotive qualification is confirmed per the manufacturer datasheet excerpt (Temperature Grade: Automotive). RoHS, REACH, lead-free, and halogen-free status were not explicitly provided in the verified web data; consult the NXP product page directly. The original Freescale datasheet predates current RoHS attestation templates, so this is a likely data gap rather than a non-compliance.
