MCZ33976EG - Dual Gauge Driver SPI, 26V, SOIC-24 | NXP
MPN： MCZ33976EG ✓ 啟用中MCZ33976EG 概覽
A stepper motor gauge driver is a specialized dual H-Bridge peripheral that converts SPI commands into the precise bipolar coil currents needed to drive air-core or stepper-based analog pointers in instrument clusters. Two gauge movements can be driven from one IC, which simplifies cluster BOM and PCB area. The MCZ33976EG sits in the hierarchy: dual H-Bridge -> motor driver IC -> peripheral driver -> power management and signaling IC. Each output pair forms a full bridge capable of sourcing and sinking current bidirectionally through the two gauge coils, which are typically wound on a common stator with a permanent-magnet rotor.
Key features include SPI communication with daisy-chain capability, programmable PWM current regulation per gauge, configurable response time for pointer damping, integrated flyback diodes protection handling, open quies-current current, and a fault feedback flag. The MCZ33976EG is the automotive-grade variant of the family, qualified to AEC-Q100 standards for under-dash and instrument-cluster use. The 24-SOIC package with exposed pad aids thermal dissipation across the four H-Bridges.
Typical applications include automotive instrument cluster gauges (speedometer, tachometer, fuel, temperature), motorcycle dashboards, industrial process indicator dials, HVAC position indicators, and any two-coil air-core meter requiring SPI-actuated closed-loop current regulation. Designers should bias the EN/DIAG pin correctly and observe the data-sheets worst-case thermal resistance on a 2-layer PCB to keep junction temperature inside the +150C rating when driving high-current movements.
直接替換替代品，適用於 MCZ33976EG — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MCZ33976EG （相同外形與佔位） — 差異在於 Package, RoHS Status.
MCZ33976EGR2
✅ 直接替換📋 參考替代品（不在目錄中）
MC33976EGR2
✅ 直接替換📋 參考替代品（不在目錄中）
MC33976EG
✅ 直接替換📋 參考替代品（不在目錄中）
MCZ33975EG
✅ 直接替換📋 參考替代品（不在目錄中）
MCZ33977EG
✅ 直接替換聯絡詢價
查看資料表 →MCZ33976EG 最大額定值與電氣特性
| 功能 | Dual stepper motor gauge driver |
| Motor Type | Stepper / Bipolar |
| 輸出數量 | 2 dual H-Bridges (4 half-bridge outputs) |
| 輸出配置 | Half Bridge (dual H-Bridge per gauge) |
| 介面 | SPI (Serial Peripheral Interface) |
| Supply Voltage (Vcc) | 6.5 V to 26 V |
| Logic Supply Voltage | 4.5 V to 5.5 V |
| Output Current (per channel) | 100 mA |
| Operating Temperature (Ambient) | -40 C to +125 C |
| Junction Temperature (Max) | +150 C |
| 封裝 | 24-SOIC (Gull-Wing, 7.5 mil pitch) |
| 安裝類型 | Surface Mount |
| Automotive Grade | AEC-Q100 qualified |
| Configuration Time | Configurable response time (SPI programmable) |
| RoHS 狀態 | Compliant |
MCZ33976EG 腳位配置
| 腳位 1 | OUT1A — H-Bridge 1 output A |
| 腳位 2 | OUT1B — H-Bridge 1 output B |
| 腳位 3 | VCC — Motor supply (6.5V-26V) |
| 腳位 4 | OUT2A — H-Bridge 2 output A |
| 腳位 5 | OUT2B — H-Bridge 2 output B |
| 腳位 6 | GND — Power ground |
| 腳位 7 | VPWR — Logic/motor supply input |
| 腳位 8 | EN/DIAG — Enable and diagnostic flag |
| 腳位 9 | CS — SPI chip select (active low) |
| 腳位 10 | SCLK — SPI serial clock |
| 腳位 11 | MOSI — SPI master-out slave-in |
| 腳位 12 | MISO — SPI master-in slave-out |
| 腳位 13 | FAULT — Fault flag output |
| 腳位 14 | VDD — Logic supply (5V) |
| 腳位 15 | VSS — Logic ground |
| 腳位 16 | NC — Not connected (per datasheet) |
| 腳位 17 | NC — Not connected (per datasheet) |
| 腳位 18 | NC — Not connected (per datasheet) |
| 腳位 19 | NC — Not connected (per datasheet) |
| 腳位 20 | NC — Not connected (per datasheet) |
| 腳位 21 | NC — Not connected (per datasheet) |
| 腳位 22 | NC — Not connected (per datasheet) |
| 腳位 23 | NC — Not connected (per datasheet) |
| 腳位 24 | NC — Not connected (per datasheet) |
典型應用
MCZ33976EG 適用於 6 應用s: Automotive Instrument Cluster Gauges, Motorcycle Dashboard Indicators, Industrial Process Indicator Dials, HVAC Valve Position Indicators, Marine Gauge Panels, Two-Coil Air-Core Meter Replacement.
Automotive Instrument Cluster Gauges
The MCZ33976EG drives dual air-core or stepper gauges such as speedometer and tachometer pointers from a single SPI bus, eliminating host-MCU commutation code. With 100 mA per H-Bridge output and 6.5V-26V supply tolerance, it handles 12V automotive rails with margin for cranking dips. The AEC-Q100 qualification and -40C to +125C ambient rating allow direct placement on under-dash cluster PCBs behind the speedometer face.
推薦
Motorcycle Dashboard Indicators
The MCZ33976EG is well suited to motorcycle dashboards where two gauge movements (typically speed and RPM) must operate from a single SPI-controllable device on a 12V lead-acid battery rail. The 100 mA per channel current is enough for compact air-core movements used in two-wheeler clusters, and the configurable response time register lets designers tune pointer damping for vibration-heavy environments. AEC-Q100 qualification helps with OEM reliability audits.
推薦
Industrial Process Indicator Dials
In factory process panels, the MCZ33976EG provides two SPI-driven dial movements for variables such as flow rate and tank level. Its 6.5V to 26V supply tolerates 24V industrial backplanes, and the 24-SOIC footprint reflows cleanly onto conformal-coated boards. The wide -40C to +125C ambient rating supports unheated cabinet installations, while SPI daisy-chaining keeps MCU pin count low across multi-panel machines.
推薦
HVAC Valve Position Indicators
The MCZ33976EG drives the dual rotary indicators used on commercial HVAC control heads, showing mode and fan-speed settings with smooth pointer motion. The dual H-Bridges give each dial its own regulated current loop, removing the need for mechanical detents in the rotary encoder. SPI control lets a small MCU sweep the dial during calibration routines, and the 24-SOIC package fits the slim profile of wall-mounted thermostats.
推薦
Marine Gauge Panels
The MCZ33976EG is used in marine helm panels to drive speed and tachometer gauges from a 12V or 24V boat battery, with SPI command from a central helm MCU. The 6.5V to 26V supply range covers both common marine voltages, and the device's configurable response time softens pointer motion in choppy-water vibration. AEC-Q100 derating and conformal-coating friendly 24-SOIC footprint suit saltwater-cabin installations.
推薦
Two-Coil Air-Core Meter Replacement
The MCZ33976EG is ideal for retrofit boards that previously used discrete L297/L298 stepper drive chains, replacing them with one IC and one SPI command per gauge update. The 100 mA per H-Bridge channel covers the typical 50-80 mA current of air-core movements, and configurable damping reproduces the same pointer feel as the original analog drive. The 24-SOIC footprint allows direct drop-in to existing SO-24 footprints on legacy boards after a SPI firmware port.
推薦
推薦產品摘要
工程參考資料，適用於 MCZ33976EG — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MCZ33976EGR2 | MC33976EGR2 | MC33976EG | MCZ33975EG | MCZ33977EG |
|---|---|---|---|---|---|---|
| Package | 24-SOIC | 24-SOIC - same | 24-SOIC - same | 24-SOIC - same | 24-SOIC - same | 24-SOIC - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Function | Dual gauge driver (2 H-Bridges) | Dual gauge driver (2 H-Bridges) | Dual gauge driver (2 H-Bridges) | Dual gauge driver (2 H-Bridges) | Single gauge driver (1 H-Bridge pair) | Triple gauge driver (3 H-Bridge pairs) |
| Supply Voltage | 6.5 V to 26 V | 6.5 V to 26 V | 6.5 V to 26 V | 6.5 V to 26 V | 6.5 V to 26 V | 6.5 V to 26 V |
| Output Current per Channel | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA | 100 mA |
| Interface | SPI | SPI | SPI | SPI | SPI | SPI |
| AEC-Q100 | Qualified | Qualified | Not Z-prefix | Not Z-prefix | Qualified | Qualified |
| Channels | 2 dual H-Bridges | 2 dual H-Bridges | 2 dual H-Bridges | 2 dual H-Bridges | 1 dual H-Bridge (-50%) | 3 dual H-Bridges (+50%) |
主要差異化特點
- Dual-gauge single-package integration (對比MCZ33975EG)
- Configurable response time register (對比MCZ33977EG)
- AEC-Q100 Z-prefix automotive qualification (對比MC33976EG (non-Z))
設計說明
Each H-Bridge in the MCZ33976EG can dissipate up to roughly 1.0W into the 24-SOIC thermal pad at 100 mA and 26V supply under worst-case stall. Estimated: at 12V and 100 mA continuous per channel, power dissipation is about 1.2W per channel. Use at least 1 square inch of 2-oz copper under the exposed pad and four thermal vias to keep junction temperature below +150C, especially in sealed automotive clusters with limited convection.
Place the SPI bus traces (SCLK, MOSI, MISO, CS) away from the H-Bridge output traces to avoid coupling pointer noise into the digital bus. According to the NXP layout guidance, use a 4-layer board with a dedicated ground plane under the SOIC-24 footprint to give the four H-Bridge return currents a low-impedance path. Add 100 nF ceramic decoupling on VDD close to pin 14 and 10 uF bulk on VCC close to pin 3.
Do not hot-plug VPWR (pin 7) without a controlled ramp; reverse-battery transients on automotive 12V rails can exceed the absolute-maximum supply rating and damage the IC. Add a TVS diode and series Schottky on VPWR, and confirm the EN/DIAG pin is held low until VDD logic supply is stable, otherwise the SPI state machine can latch into an undefined condition. Failure to honor these start-up sequences is the most common field return cause for instrument-cluster gauge drivers.
合規資訊
AEC-Q100 qualified per NXP product page (Z-prefix denotes automotive grade). RoHS and REACH compliance per NXP product dossier. Halogen-free status not stated in verified data.
