NXP Semiconductors MCZ33287EG

Overview

MCZ33287EG from Freescale Semiconductor is an automotive-grade contact monitoring and dual low-side protected driver IC. It interfaces switch contacts (to VBAT or GND) with a microcontroller via eight high-voltage sense inputs (40 V rated, ratiometric to VBAT), two current-limited low-side drivers (535 mA, 50 V clamp), and integrated diagnostics. Used in vehicle body control modules for door switch sensing and load driving.

For engineers reviewing the MCZ33287EG datasheet, MCZ33287EG pinout, MCZ33287EG application, or MCZ33287EG equivalent, key selection considerations include its 20-pin SOICW Pb-free package, dual-driver thermal shutdown reporting, multiplexed IN0–IN6 status output on OUT1, and direct IN7-to-OUT7 path - all critical for automotive switch monitoring and inductive load control.

Technical Context

The MCZ33287EG integrates an 8-to-1 analog multiplexer with address decoding (AD0–AD2) to route IN0–IN6 or diagnostic signals (DIAGD1/DIAGD2) to OUT1, while IN7 connects directly to OUT7. Its two low-side drivers feature independent command polarity: CD1 active-low, CD2 active-high, with internal pull-up on CD1 and pull-down on CD2.

Protection architecture includes per-driver overtemperature detection (145–175°C trip), output current limiting (300–750 mA), and positive voltage clamping (40–60 V). Standby supply current is 55 µA at VDD1 ≤ 14 V, supporting low-power vehicle wake-up monitoring.

Key Specifications

Pinout & Package

MCZ33287EG uses a 20-pin Small Outline Integrated Circuit Wide-body (SOICW) package, Pb-free per EG suffix, footprint compatible with DW variant. Pin spacing is 1.27 mm, body width 7.5 mm, compliant with JEDEC MS-013.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar contact monitoring and dual low-side driver applications.

Compared with MCZ33287EG, MC33883 and BTS724G provide driver functionality but omit the eight-channel contact monitoring, multiplexed output, and ratiometric threshold architecture - making them unsuitable drop-in replacements for body control switch interface applications.

Availability

MCZ33287EG is available at Aetrix Electronics and suitable for automotive body electronics, vehicle access systems, and interior control modules requiring stable component supply and long-term lifecycle support.

Supply support for MCZ33287EG 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 and industrial microcontrollers and analog power solutions, with deep expertise in functional safety and AEC-Q100 qualified devices.

The MCZ33287EG belongs to Freescale's contact monitoring and protected driver product line, designed specifically for automotive body control units needing robust, integrated switch sensing and load driving in space-constrained ECUs.

FAQ

What is the maximum input voltage rating for the sense inputs on the MCZ33287EG?

The MCZ33287EG sense inputs (IN0–IN7) are rated for 40 V maximum, with absolute maximum ratings defined in Table 2 of the datasheet. This allows direct connection to automotive battery rails (12 V or 24 V systems) without external protection, provided a series resistor ≥25 kΩ is used per input per datasheet Note 1.

Does the MCZ33287EG support both switch-to-VBAT and switch-to-GND configurations?

Yes, the MCZ33287EG supports both configurations: each of the eight sense inputs (IN0–IN7) can monitor switches connected either to VBAT (pull-up) or to GND (pull-down), as confirmed in the "Contact Configuration" diagram (Figure 7) and functional description on page 1 of the datasheet.

How does the multiplexer in the MCZ33287EG select which input appears on OUT1?

The MCZ33287EG uses AD0–AD2 pins to configure the 8-to-1 multiplexer. Per Table 6, binary combinations (e.g., AD2=Low, AD1=Low, AD0=Low selects IN0) route IN0–IN6 or DIAGD1/DIAGD2 to OUT1. IN7 bypasses the multiplexer and connects directly to OUT7.

What is the purpose of the CD1 and CD2 pins on the MCZ33287EG?

CD1 and CD2 are command inputs controlling the two low-side drivers. CD1 is active-low (driver ON when low), with an internal pull-up; CD2 is active-high (driver ON when high), with an internal pull-down - eliminating need for external bias resistors in most applications, as stated in Figure 8 note and Table 5.

Is the MCZ33287EG RoHS-compliant and lead-free?

Yes, the EG suffix explicitly denotes Pb-free packaging per Freescale's RoHS-compliant program. Page 14 confirms "EG SUFFIX (PB-FREE)" and page 1 states compliance with JEDEC J-STD-020C reflow standards for lead-free assembly.