NXP Semiconductors MCZ33742SEGR2

Overview

MCZ33742SEGR2 from NXP Semiconductors (formerly Freescale) is an SPI-controlled System Basis Chip (SBC) integrating a 1.0 Mbps CAN 2.0-compliant transceiver, dual 5.0 V regulators (one internal LDO, one external PNP-driven), high-side switch (150 mA current-limited), programmable watchdog, and four wake-up inputs - designed for automotive ECU power management and communication. It operates across -40 °C to 125 °C in 28-pin SOICW packaging.

For engineers reviewing the MCZ33742SEGR2 datasheet, MCZ33742SEGR2 pinout, MCZ33742SEGR2 application, or MCZ33742SEGR2 equivalent, this page delivers verified technical context, exact pin functions, real-world automotive use cases, and validated alternative parts with documented functional differences - all grounded in Freescale Semiconductor Document Number MC33742 Rev. 15.0 (Dec 2014).

Technical Context

The MCZ33742SEGR2 implements a multi-mode state machine (Normal, Standby, Stop, Sleep) with configurable wake-up sources (L0–L3, CAN bus, cyclic sense), internal oscillator (100 kHz), and SPI interface up to 4.0 MHz for register-based control of reset thresholds, watchdog periods, and regulator enable states. Its CAN transceiver supports bus diagnostics including dominant/recessive detection and over-current reporting via CAN register flags.

It features two independent voltage regulation paths: a fixed 5.0 V/200 mA LDO (VDD) with dropout ≤0.5 V at 200 mA and thermal pre-warning (125 °C), plus a V2 sense/control pair enabling an external PNP pass transistor for a second 5.0 V rail. The HS driver provides 150 mA current-limited high-side switching with thermal shutdown at 155 °C.

Key Specifications

Pinout & Package

MCZ33742SEGR2 is housed in a 28-pin SOICW (Small Outline Integrated Circuit, Wide-body) package with exposed thermal pad, Pb-free (RoHS-compliant) finish, and JEDEC-standard footprint (98ASB42345B). Pin 1 marked by notch or dot; pins 6–9 and 20–23 are GND for thermal and noise integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar system basis chip applications.

Compared with MCZ33742SEGR2, MC33816 adds LIN and CAN FD but requires PCB redesign; TLE9471-2ES offers higher current and ASIL-D readiness but lacks the V2 external regulator flexibility and has no L0–L3 wake-up inputs - making MCZ33742SEGR2 optimal for cost-sensitive, CAN 2.0-only body electronics with legacy MCU interfaces.

Availability

MCZ33742SEGR2 is available at Aetrix Electronics and suitable for automotive body control modules, engine control units, transmission controllers, and ADAS sensor hubs requiring stable component supply, AEC-Q100 qualification, and long-term automotive lifecycle support.

Supply support for MCZ33742SEGR2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in automotive-grade analog and mixed-signal ICs.

The MCZ33742SEGR2 belongs to NXP's System Basis Chip product line, engineered specifically for automotive electronic control units needing integrated power management, CAN communication, and intelligent wake-up capabilities in harsh environments.

FAQ

What is the primary function of the MCZ33742SEGR2 in an automotive ECU?

The MCZ33742SEGR2 serves as a System Basis Chip that integrates critical subsystems: a 1.0 Mbps CAN 2.0B transceiver, a 5.0 V/200 mA LDO regulator (VDD), a V2 control interface for an external 5.0 V regulator, a 150 mA high-side switch, programmable watchdog, and four wake-up inputs. It replaces multiple discrete components in automotive ECUs, reducing design complexity and improving reliability under harsh conditions.

Does the MCZ33742SEGR2 support CAN FD or only classical CAN?

The MCZ33742SEGR2 supports only classical CAN 2.0B at up to 1.0 Mbps. It does not implement CAN FD protocol features such as flexible data-rate or extended data length. Its transceiver complies strictly with ISO 11898-2 for high-speed CAN, with bus diagnostic capabilities limited to dominant/recessive state detection and over-current reporting via CAN register flags.

How does the V2 regulator interface work on the MCZ33742SEGR2?

The MCZ33742SEGR2 provides V2 (sense input) and V2CTRL (base drive output) pins to control an external PNP bipolar junction transistor, enabling a second 5.0 V regulated rail. V2 monitors the emitter voltage of the external transistor; V2CTRL supplies base current to maintain regulation. This architecture allows designers to scale output current beyond the internal 200 mA limit while retaining tight voltage control and thermal protection.

What are the key differences between MCZ33742SEGR2 and the non-S variant MC33742PEG/R2?

The "S" suffix in MCZ33742SEGR2 denotes a shorter reset pulse duration: 3.5 ms typical versus 15 ms for the base MC33742. This difference arises from internal timing circuitry and affects MCU reset hold time. All other electrical characteristics, pinout, package, and functional behavior remain identical between the two variants, making them pin-compatible with software-adjusted reset timing expectations.

Is the MCZ33742SEGR2 qualified to AEC-Q100 standards?

Yes, the MCZ33742SEGR2 is AEC-Q100 qualified for Grade 1 (-40 °C to +125 °C ambient), as confirmed by Freescale Semiconductor's documentation (Document Number MC33742 Rev. 15.0). It meets stress test requirements including HTOL, TC, UHAST, and ESD (±4 kV HBM on HS/Lx/CAN pins), and is rated for automotive under-hood and chassis applications.