NXP Semiconductors MCZ33199EFR2

Overview

MCZ33199EFR2 from Freescale Semiconductor is an automotive-grade LIN/ISO-9141 physical layer transceiver IC designed for diagnostic communication between microcontrollers and vehicle K/L lines. It delivers 200 kBaud transmission speed, integrated VBAT-tolerant reference voltage generator (REF-OUT), short-circuit-protected DIA output (K-line driver), and L-line wake-up receiver - all in a 14-pin SOIC package rated for -40°C to +125°C operation.

For engineers reviewing the MCZ33199EFR2 datasheet, MCZ33199EFR2 pinout, MCZ33199EFR2 application, or MCZ33199EFR2 equivalent, key selection criteria include ISO-9141 compliance, dynamic I1 current source for fast K-line rise time, thermal shutdown with hysteresis, 38 V absolute maximum rating on DIA/L pins, and Pb-free EF-suffix packaging.

Technical Context

The MCZ33199EFR2 implements dual comparator-based signal conditioning for K-line (DIA/RXD/REF-IN-K path) and L-line (L/LO/REF-IN-L path), with thresholds derived from a VBAT-dependent internal reference (2.7–10.8 V). Its TXD-controlled open-drain DIA output drives the K-line with current limiting (typ. 60 mA) and thermal shutdown, while the I1 pin provides a transient 80 mA current boost during TXD low-to-high transitions to charge bus capacitance ≤4 nF.

LO and RXD are open-collector outputs with internal 2 kΩ pull-ups to VCC; both exhibit 450 ns propagation delay. The device operates from dual supplies: 4.5–5.5 V on VCC (ICC < 1.5 mA) and 4.5–20 V on VS (IS < 2.0 mA), with ESD protection (±2000 V HBM) and overvoltage clamping on DIA, L, and VS pins.

Key Specifications

Pinout & Package

MCZ33199EFR2 is housed in a 14-pin SOIC (Small Outline Integrated Circuit) plastic package with Pb-free EF suffix, footprint code 98ASB42565B, and standard 1.27 mm pitch. Thermal resistance θ_JA = 180°C/W supports operation at full ambient temperature with minimal heatsinking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ISO-9141 physical layer transceiver applications.

Compared with MC33199D, MCZ33199EFR2 adds Pb-free compliance without electrical change; compared with TLE6250G, it provides native ISO-9141 L-line wake-up and dynamic I1 current boost - critical for legacy diagnostic tool interoperability and high-speed K-line timing.

Availability

MCZ33199EFR2 is available at Aetrix Electronics and suitable for automotive OBD-II diagnostics, ECU flash programming, multi-node vehicle networks, and aftermarket diagnostic tool development requiring stable component supply across extended temperature and regulatory environments.

Supply support for MCZ33199EFR2 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

Freescale Semiconductor (now part of NXP Semiconductors) is a leading designer of automotive and industrial analog/mixed-signal ICs, known for high-reliability power management, interface, and sensor solutions.

The MCZ33199EFR2 belongs to Freescale's automotive interface product line, engineered specifically for robust, standards-compliant vehicle diagnostic communication in harsh electrical environments.

FAQ

What is the primary function of the MCZ33199EFR2 in automotive systems?

The MCZ33199EFR2 serves as an ISO-9141 physical layer transceiver, interfacing microcontrollers with vehicle diagnostic K and L lines. It handles K-line driving (via DIA), L-line wake-up detection (via L/LO), and signal conditioning using a VBAT-referenced internal reference. Its design ensures compliance with ISO-9141-2 timing, fault protection, and environmental requirements for under-hood automotive deployment.

How does the I1 pin on the MCZ33199EFR2 improve communication speed?

The I1 pin on the MCZ33199EFR2 provides a transient 80 mA current source activated only during TXD low-to-high transitions. This dynamically charges K-line bus capacitance (≤4 nF) to reduce rise time, enabling reliable 200 kBaud operation - significantly faster than standard ISO-9141's 10.4–20.8 kBaud. Without I1, rise time would be limited by external pull-up resistors alone.

Can the MCZ33199EFR2 operate with a 12 V battery supply only, or does it require separate 5 V logic power?

The MCZ33199EFR2 requires two independent supplies: VS (4.5–20 V) connects to vehicle battery (e.g., 12 V) and powers the reference generator and high-voltage circuitry, while VCC (4.5–5.5 V) must be supplied separately - typically from the MCU's 5 V rail. Both supplies are mandatory; the device cannot operate from VS alone, as VCC powers internal logic, comparators, and digital I/O interfaces (TXD/RXD/LO).

What protection features does the MCZ33199EFR2 include for automotive bus fault conditions?

The MCZ33199EFR2 integrates short-circuit protection on the DIA (K-line) output with current limiting (~60 mA typ.) and thermal shutdown with hysteresis. DIA and L pins tolerate −0.5 V to +38 V DC and transient pulses per ISO 7637-2. VS includes overvoltage clamping, and all I/O pins feature ±2000 V HBM ESD protection - collectively meeting stringent automotive electrical robustness requirements.

Is the MCZ33199EFR2 pin-compatible with earlier versions like MC33199D?

Yes, the MCZ33199EFR2 is pin-compatible and electrically identical to the MC33199D. The only difference is the EF suffix denoting Pb-free packaging (98ASB42565B SOIC), whereas the D-suffix uses leaded solder finish. No PCB layout changes are needed when upgrading from MC33199D to MCZ33199EFR2, making it a drop-in replacement for RoHS compliance.