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Home > Products > Integrated Circuits (ICs) > Interface > Specialized

NXP Semiconductors MCZ33199EF

Name: MCZ33199EF
Brand: NXP Semiconductors
SKU: MCZ33199EF
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCZ33199EF

Manufacturer:: NXP Semiconductors

Category:: Specialized

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: MCZ33199EF.pdf

Description:: IC INTERFACE SPECIALIZED 14SOIC

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Product details

Overview

MCZ33199EF 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 short-circuit and over-temperature protection on the DIA (K-line) driver, and a dynamic I1 current source for fast bus rise-time. It operates across -40°C to +125°C and supports VBAT up to 40 V in 14-pin SOIC (EF Pb-free) packaging.

For engineers reviewing the MCZ33199EF datasheet, MCZ33199EF pinout, MCZ33199EF application, or MCZ33199EF equivalent, key selection considerations include ISO-9141 compliance, K-line current limiting (60 mA typ), REF-OUT voltage tracking vs. VS (0.5×VS for 5.6–18 V), thermal shutdown at 155°C, and CMOS-compatible TXD/RXD/LO I/O levels.

Technical Context

The MCZ33199EF implements dual comparator-based signal conditioning for ISO-9141 L-line wake-up and K-line bidirectional communication, with independent REF-IN-L and REF-IN-K inputs tied to a VBAT-dependent internal reference (REF-OUT). Its DIA output is an open-collector K-line driver with programmable current limiting and thermal shutdown, while the I1 pin provides a transient 80 mA current boost during TXD low-to-high transitions to charge bus capacitance and enable 200 kBaud operation.

It features two isolated power domains: 5 V VCC for logic interface and VBAT (4.5–20 V) for bus-side circuitry, with ESD protection (±2 kV), reverse-battery robustness via external diode on I1, and 38 V absolute max ratings on DIA and L pins. The LO and RXD outputs are open-collector with internal pull-ups (2 kΩ typ), and all analog thresholds exhibit 450 mV typical hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Transmission Speed	Up to 200 kBaud - enables high-speed diagnostic messaging compliant with ISO-9141 fast initialization sequences.
K-line Driver Current Limit	60 mA typical - protects against short-to-battery faults while sustaining reliable dominant-state drive under load.
Thermal Shutdown Threshold	155°C with hysteresis - disables DIA output during overtemperature events and prevents latch-up or permanent damage.
REF-OUT Voltage Range	2.7–10.8 V depending on VS - scales linearly (0.5×VS) from 5.6–18 V, enabling adaptive comparator thresholds for varying battery conditions.
I1 Dynamic Current Source	80 mA for 4 μs - accelerates K-line rise time by charging bus capacitance (≤4 nF), critical for achieving 200 kBaud timing.
Operating Temperature	-40°C to +125°C - qualified for under-hood automotive ECU environments without derating.
ESD Protection	±2000 V HBM - ensures robustness during handling and system integration in production and service environments.

Pinout & Package

MCZ33199EF is housed in a 14-pin SOIC plastic package (suffix EF denotes Pb-free; package code 98ASB42565B), optimized for automotive PCB layouts with thermal pad grounding via GND pin (10) and reverse-battery protection support on I1 (11).

Pin/Terminal	Circuit Role	Design Meaning
1 VCC	Logic supply input	5 V nominal supply for internal logic and comparators; draws ≤1.5 mA - powers MCU interface circuitry independently of VBAT.
2 REF-IN-L	L-line comparator reference input	Accepts internal REF-OUT or external voltage to set wake-up threshold; enables VBAT-adaptive L-line detection.
3 REF-IN-K	K-line comparator reference input	Same as REF-IN-L but for K-line RX path; allows matched hysteresis and noise immunity on diagnostic bus.
4 LO	L-line status output	Open-collector output indicating L-line state; requires external pull-up; used for wake-up interrupt generation in MCU.
5 RXD	K-line receive output	Open-collector logic-level output reflecting K-line state (recessive = high, dominant = low); includes 2 kΩ internal pull-up.
6 TXD	K-line transmit input	CMOS-compatible input controlling DIA driver; low = assert dominant K-line, high = release to recessive state.
7,8 NC	No connection	Unbonded die pads - must remain unconnected per design; no routing or copper fill required.
9 DIA	K-line driver/output & comparator input	Open-collector K-line terminal with current limiting (60 mA typ), thermal shutdown, and ±38 V fault tolerance.
10 GND	Power and signal reference	Common ground for all circuits; also serves as primary thermal path - requires solid copper pour for junction temp control.
11 I1	Dynamic bus charge current source	Provides 80 mA transient boost during TXD rising edge to reduce K-line rise time; must connect to DIA for 200 kBaud operation.
12 L	L-line input	Protected (±38 V) input for ISO-9141 wake-up sequence; exhibits 7.5 µA internal pull-down for bus biasing.
13 VS	VBAT supply input	4.5–20 V main bus supply; withstands 40 V transients; powers DIA, I1, and analog blocks - requires external reverse-battery diode on I1.
14 REF-OUT	Internal reference voltage output	VBAT-scaled reference (0.5×VS, clamped outside 5.6–18 V); drives REF-IN-L/K and supports external circuitry up to ±50 µA.

Key Features

Feature	Design Value
ISO-9141 Physical Layer Compliance	Fully implements K-line driver, L-line receiver, and timing requirements per ISO-9141-2, including wake-up, initialization, and data phases.
Dynamic I1 Current Boost	Delivers 80 mA for 4 µs during TXD rising edge to charge K-line parasitic capacitance ≤4 nF - essential for 200 kBaud operation.
Dual Independent Comparator Inputs	Separate REF-IN-L and REF-IN-K allow independent threshold tuning for L-line wake-up and K-line data reception under varying VBAT.
Integrated Thermal & Short-Circuit Protection	DIA driver shuts down at 155°C and limits current to 60 mA typ - eliminates need for external fusing or thermal sensors in ECU designs.
Pb-Free SOIC Packaging (EF Suffix)	RoHS-compliant 14-pin SOIC with JEDEC-standard reflow profile (J-STD-020C); identical footprint and thermal performance to legacy D-suffix parts.

Applications

On-Board Diagnostics (OBD-II)	Electronic Control Unit (ECU) Wake-Up
Use Scenario: Vehicle service tools communicate with engine, ABS, or airbag ECUs via standardized OBD-II DLC connector using ISO-9141 protocol. IC Role / Device Role / Timing Role: MCZ33199EF acts as the physical layer interface, converting MCU UART signals to K-line voltage levels and detecting L-line wake pulses. Use Value: Enables certified diagnostic access with 200 kBaud burst mode and guaranteed fault tolerance up to 38 V - meets OEM OBD-II validation requirements.	Use Scenario: Sleeping ECUs monitor the vehicle bus for L-line activity to initiate wake-up before full CAN/LIN communication begins. IC Role / Device Role / Timing Role: MCZ33199EF continuously monitors L-line voltage via C2 comparator and asserts LO output to MCU upon valid wake pulse detection. Use Value: Provides low-quiescent-current (≤1.5 mA on VCC) wake-up sensing with 450 mV hysteresis - reduces false triggers from noise or battery ripple.
K-Line Multipoint Diagnostic Networks	Automotive End-of-Line Programming
Use Scenario: Multiple ECUs share a single K-line bus in cost-sensitive vehicles (e.g., entry-level models), requiring open-collector arbitration and fault containment. IC Role / Device Role / Timing Role: MCZ33199EF's open-collector DIA and RXD outputs allow wired-AND bus topology; each device drives only when needed. Use Value: Supports multi-node K-line networks with individual short-circuit protection - prevents single-point failure from disabling entire diagnostic bus.	Use Scenario: Manufacturing plants program ECU firmware and calibrations via K-line during final assembly, requiring robust communication under variable battery conditions. IC Role / Device Role / Timing Role: MCZ33199EF maintains stable K-line signaling across VBAT range (4.5–20 V) and tolerates load variations from multiple connected modules. Use Value: Ensures reliable programming link even at low battery (4.5 V) or high-transient factory environments - reduces line-stop incidents.

On-Board Diagnostics (OBD-II)

Electronic Control Unit (ECU) Wake-Up

Use Scenario: Vehicle service tools communicate with engine, ABS, or airbag ECUs via standardized OBD-II DLC connector using ISO-9141 protocol.

IC Role / Device Role / Timing Role: MCZ33199EF acts as the physical layer interface, converting MCU UART signals to K-line voltage levels and detecting L-line wake pulses.

Use Value: Enables certified diagnostic access with 200 kBaud burst mode and guaranteed fault tolerance up to 38 V - meets OEM OBD-II validation requirements.

Use Scenario: Sleeping ECUs monitor the vehicle bus for L-line activity to initiate wake-up before full CAN/LIN communication begins.

IC Role / Device Role / Timing Role: MCZ33199EF continuously monitors L-line voltage via C2 comparator and asserts LO output to MCU upon valid wake pulse detection.

Use Value: Provides low-quiescent-current (≤1.5 mA on VCC) wake-up sensing with 450 mV hysteresis - reduces false triggers from noise or battery ripple.

K-Line Multipoint Diagnostic Networks

Automotive End-of-Line Programming

Use Scenario: Multiple ECUs share a single K-line bus in cost-sensitive vehicles (e.g., entry-level models), requiring open-collector arbitration and fault containment.

IC Role / Device Role / Timing Role: MCZ33199EF's open-collector DIA and RXD outputs allow wired-AND bus topology; each device drives only when needed.

Use Value: Supports multi-node K-line networks with individual short-circuit protection - prevents single-point failure from disabling entire diagnostic bus.

Use Scenario: Manufacturing plants program ECU firmware and calibrations via K-line during final assembly, requiring robust communication under variable battery conditions.

IC Role / Device Role / Timing Role: MCZ33199EF maintains stable K-line signaling across VBAT range (4.5–20 V) and tolerates load variations from multiple connected modules.

Use Value: Ensures reliable programming link even at low battery (4.5 V) or high-transient factory environments - reduces line-stop incidents.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MC33199D	Same core silicon, but RoHS-noncompliant Pb-based SOIC (D suffix); lacks EF Pb-free qualification and updated reflow specs.	Legacy automotive programs where Pb-free compliance is not mandated; identical electrical behavior and pinout.	Select MC33199D only if RoHS exemption applies; MCZ33199EF is direct drop-in replacement with identical form, fit, and function.
TLE6232G	Infineon LIN transceiver with integrated watchdog and voltage regulator; supports LIN 2.x but not ISO-9141; different pinout and higher quiescent current.	Modern LIN-only systems requiring embedded diagnostics; not suitable for ISO-9141 diagnostic port compatibility.	Choose TLE6232G only for new LIN-based architectures; MCZ33199EF remains mandatory for ISO-9141-compliant OBD-II interfaces.

Compared with MC33199D, MCZ33199EF offers identical electrical performance with Pb-free manufacturing compliance, while TLE6232G targets a different protocol stack and cannot substitute in ISO-9141 diagnostic roles - making MCZ33199EF the sole qualified solution for legacy and hybrid diagnostic systems.

Availability

MCZ33199EF is available at Aetrix Electronics and suitable for automotive OBD-II diagnostics, ECU wake-up subsystems, and end-of-line programming interfaces requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-aligned reliability.

Supply support for MCZ33199EF 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 global leader in automotive microcontrollers and analog interface solutions, with deep expertise in vehicle networking and functional safety.

The MCZ33199EF belongs to Freescale's automotive interface IC portfolio, engineered specifically for ISO-9141-2 physical layer compliance in diagnostic and programming applications across passenger vehicles and light commercial platforms.

FAQ

What is the maximum bus voltage the MCZ33199EF can withstand on its DIA and L pins?

The MCZ33199EF supports absolute maximum voltages of ±38 V on both DIA and L pins, achieved via integrated zener diode protection. This rating covers common automotive transients such as load dump and jump-start conditions, ensuring robust operation without external clamping components. The device remains functional within its specified operating range (VS = 4.5–20 V) while surviving brief excursions beyond that limit - a critical feature for under-hood ECU deployments where electrical stress is routine. MCZ33199EF's design inherently accommodates these stresses without degradation.

How does the I1 pin function in the MCZ33199EF, and when must it be connected?

The I1 pin on the MCZ33199EF delivers a transient 80 mA current pulse for 4 µs during TXD low-to-high transitions to rapidly charge K-line bus capacitance (≤4 nF), enabling 200 kBaud operation. It must be externally connected to the DIA pin to activate this feature; leaving I1 unconnected disables the boost and limits transmission speed to ~10.4 kBaud. The I1 source is powered from VS and requires an external reverse-battery protection diode on its path - a requirement explicitly documented in the MCZ33199EF functional description. This behavior is intrinsic to MCZ33199EF's architecture and cannot be emulated by passive components.

Is the MCZ33199EF pin-compatible with the older MC33199D variant?

Yes, the MCZ33199EF is fully pin-compatible with the MC33199D - sharing identical 14-pin SOIC footprint, pin numbering, electrical characteristics, and functional behavior. The EF suffix denotes Pb-free packaging and updated JEDEC reflow compliance (J-STD-020C), but introduces no changes to pin assignments, timing, or interface logic. Engineers may directly replace MC33199D with MCZ33199EF in existing PCB layouts without modification, preserving all signal integrity and thermal performance metrics validated for the original design. MCZ33199EF maintains backward compatibility at the hardware level.

What is the role of the REF-OUT pin in the MCZ33199EF, and how does its voltage scale?

The REF-OUT pin on the MCZ33199EF provides a VBAT-scaled internal reference voltage used to bias the REF-IN-L and REF-IN-K comparator inputs. Its output ranges from 2.7 V (clamped minimum at VS < 5.6 V) to 0.5×VS (linear region from 5.6–18 V) to 10.8 V (clamped maximum at VS > 18 V), supporting adaptive thresholding across wide battery conditions. REF-OUT can source/sink up to ±50 µA and may feed external circuitry - a capability confirmed in the MCZ33199EF electrical characteristics table. This scaling ensures consistent noise margin and wake-up sensitivity regardless of nominal battery voltage.

Does the MCZ33199EF support simultaneous operation on both K-line and L-line, and how are they isolated?

Yes, the MCZ33199EF supports concurrent K-line and L-line operation through physically separate signal paths: the K-line uses DIA/RXD/TXD with C1 comparator, while the L-line uses L/LO with C2 comparator - each with independent reference inputs (REF-IN-K and REF-IN-L) and hysteresis. No shared analog nodes exist between paths; isolation is maintained by dedicated comparators, drivers, and protection circuitry. This separation allows independent wake-up detection on L while transmitting/receiving data on K - a requirement defined in ISO-9141-2 and verified in MCZ33199EF's functional operation section. Both channels operate without crosstalk or mutual interference.

MCZ33199EF Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: -

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

Packaging:: Tube

Product Status:: Obsolete

Applications:: Diagnostic

Interface:: Serial

Voltage - Supply:: 4.5V ~ 5.5V

Supplier Device Package:: 14-SOIC

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

MCZ33199EF FAQ

1.How can I place an order for MCZ33199EF through Aetrix?

Please submit a Request for Quotation (RFQ) for MCZ33199EF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for MCZ33199EF reliable?

The price and inventory of MCZ33199EF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCZ33199EF is usually 5 days.

3.What payment methods are accepted for MCZ33199EF?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCZ33199EF transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCZ33199EF?

MCZ33199EF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCZ33199EF order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for MCZ33199EF?

For technical support, including MCZ33199EF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCZ33199EF requirements.

6.How does Aetrix verify that MCZ33199EF is sourced from the original manufacturer or authorized distributors?

All MCZ33199EF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MCZ33199EF meets industry standards.

7.What is the process for return or replacement of MCZ33199EF?

All MCZ33199EF units undergo pre-shipment inspection (PSI). If there is an issue with MCZ33199EF, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The MCZ33199EF part is unused and in its original packaging.

Return procedure for MCZ33199EF:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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