MCF51QE32LH - 32-bit ColdFire V1 MCU, 32KB Flash, 50MHz | NXP
MPN： MCF51QE32LH ✗ 停產MCF51QE32LH 概覽
A 32-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single die to provide embedded control within the broader semiconductor hierarchy: ColdFire V1 CPU -> MCU -> embedded processor -> semiconductor. The QE family lets engineers move between the 8-bit MC9S08QE and 32-bit MCF51QE families without changing the PCB footprint, protecting layout and software investment.
Key performance features include a 50.33-MHz ColdFire V1 CPU above 2.4V, 40-MHz operation above 2.1V, and 20-MHz operation at lower supply, with a 2.5V/3.3V supply domain as confirmed by distributor data. The Flash-based program memory supports field reprogramming, while the low-voltage, low-power design suits battery-powered and cost-sensitive embedded systems.
Architecturally, the ColdFire V1 core delivers 32-bit RISC processing with reduced code size compared to 8-bit cores, while retaining the register model familiar to HCS08 developers, easing the migration path within the Flexis series. Peripherals typically integrate serial communication, timers, and analog functions for single-chip embedded control, per the manufacturer's QE family documentation.
Typical applications include industrial control, consumer appliances, low-power sensing nodes, and motor control subsystems where 32-bit headroom and small form factor are required.
A key design consideration: this part is End of Life (EOL) per the NXP product page, so new designs should evaluate family substitutes such as MCF51QE64LH or the pin-compatible 8-bit MC9S08QE series.
This page synthesizes distributor pricing, drop-in alternatives, lifecycle status, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 MCF51QE32LH — 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： MCF51QE32LH （相同外形與佔位） — 差異在於 Package, Supply Voltage, Core Architecture, Maximum Clock Frequency, Program Memory Size.
MCF51QE32CLH
✅ 直接替換聯絡詢價
查看資料表 →MCF51QE64LH
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCF51QE128LH
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MCF51JE128VLK
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MCF51JM64EVQH
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MCF51QE32LH 最大額定值與電氣特性
| Core Processor | ColdFire V1 |
| Core Size | 32-Bit |
| Processor Series | MCF51QE (Flexis QE family) |
| 最大時脈頻率 | 50.33 MHz (above 2.4V); 40 MHz (above 2.1V); 20 MHz at lower supply |
| Program Memory Type | FLASH |
| Program Memory Size | 32KB (32K x 8) |
| RAM Size | 8KB |
| 供應電壓 | 2.5 V / 3.3 V |
| 封裝 | 64-LQFP (10 x 10 mm) |
| 安裝類型 | Surface Mount |
| Product Category | Microcontrollers (MCU) |
| Family Series | Flexis QE (pin-compatible 8-bit and 32-bit duo) |
| 生命週期狀態 | End of Life (EOL) |
| Packaging | Tray |
MCF51QE32LH 64-lqfp (10 x 10 mm) 腳位配置指南
MCF51QE32LH（64-lqfp (10 x 10 mm) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MCF51QE32LH.
請參閱 資料表 以查看完整腳位配置。
典型應用
MCF51QE32LH 適用於 6 應用s: Industrial Control Systems, Battery-Powered Portable Devices, Consumer Appliances, Sensor and Data Acquisition Nodes, Motor Control Subsystems, Legacy Design Maintenance and Last-Time Buy.
Industrial Control Systems
In industrial control and factory automation nodes, the MCF51QE32LH provides 32-bit ColdFire V1 processing at up to 50.33 MHz while retaining the QE family's low-voltage operation (2.5V/3.3V domains, 40 MHz at 2.1V). Its 32KB Flash and 8KB RAM are sufficient for sequencing logic, sensor polling loops, and Modbus-style serial communication stacks. Because the Flexis QE family is a pin-compatible 8-bit/32-bit duo in the same 64-LQFP footprint, control boards can be designed once and populated with either the MC9S08QE (8-bit) or MCF51QE (32-bit) device depending on firmware complexity - a cost-scaling strategy validated in the QE family documentation. Designs targeting new production should note the EOL status and plan a migration path.
推薦
Battery-Powered Portable Devices
For battery-operated meters, handheld instruments, and portable sensors, the MCF51QE32LH offers voltage/frequency scaling as a direct power lever: the datasheet specifies 50.33 MHz above 2.4V, 40 MHz above 2.1V, and 20 MHz at lower supply. Running at 20 MHz from a reduced supply dramatically lowers dynamic current, extending battery life in duty-cycled applications. The 64-LQFP (10 x 10 mm) package keeps board area compact, and the 32KB Flash accommodates protocol and display code typical of portable products. Firmware should implement run/wait/stop states per the QE family power-management modes to maximize average battery savings, since the core frequency alone is not the only determinant of system current.
推薦
Consumer Appliances
Consumer appliance control boards - washers, small kitchen appliances, HVAC controllers - benefit from the MCF51QE32LH's balance of 32-bit headroom and QE-family cost positioning. The 50.33-MHz ColdFire V1 core handles UI sequencing, button debouncing, and closed-loop control with margin, while the Flash program memory supports field firmware updates for feature revisions. The pin-compatible 8-bit/32-bit Flexis duo lets an appliance OEM use one PCB layout across a product range: 8-bit MC9S08QE parts for basic models, the 32-bit MCF51QE32LH for premium models with more complex logic. The 2.5V/3.3V supply suits modern low-voltage power trees derived from mains offline converters.
推薦
Sensor and Data Acquisition Nodes
Distributed sensing nodes for temperature, pressure, and level monitoring use the MCF51QE32LH as the local processing engine: its 8KB RAM buffers sample arrays, and the 32KB Flash stores calibration and compensation tables alongside application code. The 64-LQFP package exposes sufficient GPIO and serial interfaces for connecting ADCs, transceivers, and actuator drivers. Operating the ColdFire V1 core at 20-40 MHz in lower-voltage modes provides adequate real-time sampling throughput while conserving power in duty-cycled networks. Because the part is EOL, long-deployment sensor programs should hedge inventory with a last-time-buy and evaluate the MCF51QE64LH or successor Kinetis devices for future node revisions.
推薦
Motor Control Subsystems
Small motor control tasks - fans, pumps, dampers - fit within the MCF51QE32LH's capability envelope: a 50.33-MHz ColdFire V1 core executes PWM generation and closed-loop speed control with interrupt latency margins appropriate for low-complexity motors, and the 32KB Flash holds control laws plus communication firmware. The QE family's low-voltage operation aligns with 3.3V gate-driver and sensor signal chains common in appliance and HVAC motor boards. Engineers should budget core bandwidth against control-loop rate: a 20 kHz PWM loop with proportional-integral control consumes modest cycles on the V1 core, leaving headroom for serial diagnostics. For higher-complexity FOC drives, NXP's DSC (MC56F) family is the recommended upgrade path.
推薦
Legacy Design Maintenance and Last-Time Buy
A primary contemporary use of the MCF51QE32LH is sustaining existing designs: NXP lists the part as End of Life with a discontinuance Product Change Notice, so organizations supporting installed bases must secure stock through authorized distributors (DigiKey, Mouser, Arrow) or open-market channels (9 distributors tracked by Octopart). XAIPART supports BOM-quantity sourcing quotes for EOL parts including lead-time verification. When stock depletes, the pin-compatible MCF51QE64LH or MCF51QE32CLH offer same-footprint continuity within the QE family, requiring only firmware verification rather than PCB redesign. Document the ordering suffix and reprogramming tooling (ColdFire V1 debug interface) in the obsolescence management plan.
推薦
推薦產品摘要
工程參考資料，適用於 MCF51QE32LH — 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 | MCF51QE32CLH | MCF51QE64LH | MCF51QE128LH | MCF51JE128VLK | MCF51JM64EVQH |
|---|---|---|---|---|---|---|
| Package | 64-LQFP (10x10 mm) | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP (10x10 mm) - same | 64-LQFP - same family outline | 64-LQFP - same family outline |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | ColdFire V1, 32-bit | ColdFire V1, 32-bit | ColdFire V1, 32-bit | ColdFire V1, 32-bit | ColdFire V1, 32-bit | ColdFire V1, 32-bit |
| Flash Memory | 32KB | 32KB | 64KB | 128KB | 128KB | 64KB |
主要差異化特點
- Flexis QE pin-compatible 8-bit/32-bit duo (對比MC9S08QE64)
- Memory headroom upgrade path (對比MCF51QE64LH)
- Voltage-scaled performance tiers (對比MCF51QE128LH)
設計說明
The MCF51QE32LH supports frequency-versus-voltage scaling per the Freescale datasheet: 50.33 MHz requires a supply above 2.4V, 40 MHz above 2.1V, and 20 MHz at lower supply. Design the power tree so the core supply rail is stable before ramping to full speed, and implement the software frequency switch through the QE family clock configuration registers rather than changing the supply under load. For battery designs, run at 20 MHz in a reduced-voltage mode and only step up to 50.33 MHz during burst processing.
This part is End of Life per the NXP product page. Before committing a new or refreshed PCB, verify remaining distributor stock (DigiKey, Mouser, Arrow; 9 distributors on Octopart) and review the NXP discontinuance Product Change Notice referenced on the product page. Last-time-buy windows for EOL MCUs are strictly limited; a common failure mode is designing in an EOL device and discovering zero authorized stock at production release. Plan the MCF51QE64LH or Kinetis migration early.
The 64-LQFP (10 x 10 mm) footprint is shared across the pin-compatible Flexis QE 8-bit/32-bit duo, so lay out the board once with standard LQFP-64 land patterns per IPC guidance and populate either MC9S08QE or MCF51QE devices. Keep decoupling capacitors (100 nF per supply pin plus bulk) close to the package corners, and route the debug/programming header to support the ColdFire V1 debug interface for in-circuit Flash reprogramming during production.
合規資訊
Distributor listings reference RoHS details but the verified snippets do not state the explicit RoHS status; consult the NXP product page Environmental Quality section for authoritative compliance data.
