MCL908QY4DWE - 8-Bit HC08 MCU, 4KB Flash, ADC | NXP
MPN： MCL908QY4DWE ✓ 啟用中MCL908QY4DWE 概覽
A microcontroller (MCU) is a single-chip processor that integrates CPU, program memory, data memory, and peripherals such as timers, communications interfaces, and analog converters into one device. MCUs sit at the bottom of the embedded computing hierarchy - under microprocessors, parallel to DSPs, and above discrete logic. The HC08 family is the 8-bit ancestor of the HCS08 and HCS12 lines, with the "MCL" prefix denoting an extended-voltage (2.7V-5.5V) low-voltage HC08 derivative aimed at battery and 3.3V systems. The 908QY4 sits in the lowest-memory tier of this lineage, optimised for tasks that need only a few KB of firmware.
Key features include 13 general-purpose I/O lines, an internal bus clock up to 4MHz (instruction throughput up to 2MHz), an internal oscillator that removes the external crystal requirement, a multi-channel 10-bit successive-approximation ADC, a 16-bit timer with capture/compare/PWM, and a low-power wait/stop mode that draws microamps. The 16-pin SOIC (DWE suffix, 7.5mm body width) is the wide-body variant of the 16-SOIC footprint, providing standard PCB land pattern compatibility with commercial 16-SOIC layouts.
The HC08 CPU uses a von-Neumann architecture with shared program/data buses, executing one byte per internal bus cycle and supporting BCD arithmetic plus bit-manipulation instructions. The 4KB Flash is in-application programmable in some variants and provides 100 minimum erase/write cycles, with security-lock protection to block unauthorized memory read-out. Brownout detection and a low-voltage reset hold the part in a safe state when VDD drops below the operating threshold, preventing code corruption on brown-out events.
Typical applications include low-cost sensor interface modules (thermostats, smoke detectors, battery chargers), white-goods and appliance controllers (washing machines, microwave ovens, coffee machines), automotive body-electronics sub-modules (AEC-Q100 qualified parts use the S-prefix 'QC' family; the MCL variant is commercial/industrial), and consumer remote controls / IR transceivers. The internal oscillator and small footprint suit small-form-factor designs where PCB area is constrained.
When using this device, ensure VDD decoupling with at least 100nF of low-ESR ceramic placed within 5mm of the supply pin and tie unused I/O pins to defined logic levels (do not float). Programming via the background debug mode (BDM) requires the 2-pin BDM interface to be brought out to a header for firmware development; production programming can use in-circuit Flash programming through the same pins.
This page consolidates distributor pricing, drop-in compatible HC08 / S08 alternatives, and practical design considerations that go well beyond the manufacturer datasheet summary.
直接替換替代品，適用於 MCL908QY4DWE — 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： MCL908QY4DWE （相同外形與佔位） — 差異在於 Program Memory Size, Mounting Type, Package, Core Architecture, RAM Size.
MC908QY4DWE
✅ 直接替換📋 參考替代品（不在目錄中）
MC68HC908QY4DWE
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC908QY4AMPE
✅ 直接替換聯絡詢價
查看資料表 →MC908QB4CPE
✅ 直接替換聯絡詢價
查看資料表 →MC908QC16MDRE
✅ 直接替換聯絡詢價
查看資料表 →MCHC908QY1MDWE
✅ 直接替換聯絡詢價
查看資料表 →MC908QL3CDWE
✅ 直接替換聯絡詢價
查看資料表 →MCL908QY4DWE 最大額定值與電氣特性
| Core Architecture | M68HC08 (CISC, 8-bit) |
| Program Memory Size | 4 KB (4K x 8) Flash |
| RAM Size | 128 B (128 x 8) |
| Number of I/O | 13 |
| 封裝 / 外殼 | 16-SOIC (0.295 inch / 7.50 mm Width) |
| CPU Speed | 2 MHz (internal bus) |
| Internal Oscillator | Yes (trimmable) |
| Supply Voltage Range | 2.7 V to 5.5 V |
| ADC | 10-bit, multi-channel |
| Timers | 16-bit with capture/compare/PWM |
| 工作溫度 | -40 C to +85 C (commercial/industrial grade) |
| 安裝類型 | Surface Mount (SMD) |
| Packaging | Tube |
| RoHS 狀態 | Compliant |
| Brownout Reset | Yes (LVR) |
MCL908QY4DWE 腳位配置
| 腳位 1 | VDD — Positive supply voltage (2.7 V to 5.5 V) |
| 腳位 2 | PTA0/TCLK — Port A bit 0 / Timer clock input |
| 腳位 3 | PTA1 — Port A bit 1 (digital I/O) |
| 腳位 4 | PTA2 — Port A bit 2 (digital I/O or ADC input) |
| 腳位 5 | PTA3 — Port A bit 3 (digital I/O or ADC input) |
| 腳位 6 | PTA4 — Port A bit 4 (digital I/O or ADC input) |
| 腳位 7 | PTA5 — Port A bit 5 (digital I/O or ADC input) |
| 腳位 8 | VSS — Ground reference |
| 腳位 9 | PTB0 — Port B bit 0 (digital I/O) |
| 腳位 10 | PTB1 — Port B bit 1 (digital I/O) |
| 腳位 11 | PTB2 — Port B bit 2 (digital I/O) |
| 腳位 12 | PTB3 — Port B bit 3 (digital I/O) |
| 腳位 13 | PTB4 — Port B bit 4 (digital I/O) |
| 腳位 14 | PTB5/BDMCLK — Port B bit 5 / Background Debug Mode clock |
| 腳位 15 | PTA6/BKGD/MS — Port A bit 6 / Background Debug Mode data / Mode Select |
| 腳位 16 | PTA7/RESET — Port A bit 7 / External reset input (active low) |
典型應用
MCL908QY4DWE 適用於 6 應用s: Battery-Powered Smoke Detector Controller, White-Goods Appliance Control (Washing Machine / Microwave), Consumer IR Remote Control / Toy Controller, Industrial Sensor Interface Module (Thermostat / HVAC Probe), LED Lighting Dimmer Controller, Low-Cost Zigbee / Sub-GHz Wireless Node (Companion MCU).
Battery-Powered Smoke Detector Controller
The MCL908QY4DWE is well-matched to battery-powered smoke-detector controllers. Its 4 KB Flash holds the sensing-loop firmware, alarm-pattern generator, and low-battery test routine, while the 10-bit ADC reads the photoelectric or ionisation chamber signal. The integrated low-power stop mode (microamp quiescent current) extends the 9V battery life to multi-year service intervals, and the internal oscillator removes the need for an external crystal that would otherwise raise standby drain.
推薦
White-Goods Appliance Control (Washing Machine / Microwave)
In white-goods main controllers, the MCL908QY4DWE drives relays, triac drivers, and rotary-encoder inputs while the 10-bit ADC reads thermistor inputs for wash-temperature or microwave-power regulation. The 2.7-5.5 V supply tolerates rectified mains-derived rails after buck regulation, and the -40 C to +85 C industrial temperature range handles under-counter and garage-appliance thermal stress. Its 16-SOIC wide-body package is well-suited to wave-soldered appliance PCBs.
推薦
Consumer IR Remote Control / Toy Controller
For IR remote controls, toys, and small consumer appliances, the MCL908QY4DWE combines very low cost with adequate on-chip resources for PWM-driven IR LED modulation, button-matrix scanning, and protocol encoding. The internal oscillator eliminates the external resonator that would otherwise inflate BOM cost, and the wait/stop modes keep average supply current under 100 uA in idle, supporting single-coin-cell operation. Code space accommodates NEC, RC5, and SIRC protocols.
推薦
Industrial Sensor Interface Module (Thermostat / HVAC Probe)
The MCL908QY4DWE serves 4-20 mA loop-powered or low-voltage thermostat and HVAC probe modules, where its 10-bit ADC digitises temperature, humidity, or pressure sensors, and its PWM output drives opto-isolated triac outputs for damper/heater control. The wide 2.7 V to 5.5 V supply supports direct operation from rectified 24 VAC building-automation rails after regulation. The internal oscillator allows tight PCB layout without external timing components.
推薦
LED Lighting Dimmer Controller
The MCL908QY4DWE runs small-form-factor LED dimmer and constant-current driver boards, where its 16-bit timer generates high-resolution PWM at frequencies above the audible range (>20 kHz) for flicker-free dimming, and its 10-bit ADC reads the photodiode or sense-resistor feedback for closed-loop current regulation. The 2.7 V to 5.5 V operation supports direct connection to driver-side power rails after a small LDO, simplifying the bill of materials.
推薦
Low-Cost Zigbee / Sub-GHz Wireless Node (Companion MCU)
In wireless sensor nodes where the radio transceiver handles modulation, the MCL908QY4DWE acts as the host companion MCU, running application code, sensor polling, and battery management while the radio (e.g. MC1319x or CC1101) handles PHY. The 4 KB Flash fits typical Zigbee/Sub-GHz stack ellipsis layers for endpoint devices, while the integrated 10-bit ADC reads battery voltage and sensor inputs without additional analog components.
推薦
推薦產品摘要
工程參考資料，適用於 MCL908QY4DWE — 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 | MC908QY4DWE | MC68HC908QY4DWE | MC908QY4AMPE | MC908QB4CPE | MC908QC16MDRE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-SOIC (DWE) wide-body | 16-SOIC (DWE) wide-body - same | 16-SOIC (DWE) wide-body - same | 16-SOIC (DWE) wide-body - same | 16-SOIC (DWE) wide-body - same | 16-SOIC (DWE) wide-body - same |
| Core | HC08 (8-bit CISC) | HC08 (8-bit CISC) | HC08 (8-bit CISC) | HC08 (8-bit CISC) | HC08 (8-bit CISC) | HC08 (8-bit CISC) |
| Program Memory | 4 KB Flash | 4 KB Flash | 4 KB Flash | 4 KB Flash | 4 KB Flash | 16 KB Flash (+300%) |
| RAM | 128 B | 128 B | 128 B | 128 B | 128 B | 256 B (+100%) |
| CPU Speed (internal bus) | 2 MHz | 2 MHz | 2 MHz | 2 MHz | 2 MHz | 4 MHz (+100%) |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 3.0 V to 5.5 V |
| Programming Interface | BDM (Background Debug Mode) | BDM | BDM | BDM | BDM | BDM |
主要差異化特點
- Lowest-cost 4 KB Flash HC08 in 16-SOIC wide-body (對比MC908QC16MDRE)
- Wide 2.7 V - 5.5 V supply supports battery and 5 V rails (對比MC908QC16MDRE (3.0 V - 5.5 V))
- Extended-temperature industrial grade (-40 C to +85 C) (對比Lower-grade HC08 variants)
設計說明
Place a 100 nF X7R decoupling capacitor within 5 mm of the VDD pin and a 10 uF bulk capacitor on the same supply rail. The MCL908QY4DWE integrates a low-voltage reset (LVR) circuit that holds the device in reset below ~2.5 V, but designers should still ensure the supply ramps cleanly without large inrush transients that could trigger spurious resets. Verified: datasheet recommends 100 nF minimum on VDD.
Do not float unused I/O pins - configure them as outputs or tie them to defined logic levels via internal pull-ups. Floating inputs on the HC08 can supply leakage paths that raise quiescent current above the datasheet spec in stop mode, undermining battery-life claims for low-power designs. Always select the lowest-power mode consistent with wakeup latency requirements.
Route the BDM (Background Debug Mode) signals (BKGD/MS on PTA6 and BDMCLK on PTB5) to a 2-pin header if in-circuit programming is needed during production. Keep the BDM trace length under 50 mm and avoid running them parallel to switching supply or motor-drive traces. Routing the reset pin through a 1 kohm series resistor with a 1 nF cap to VDD provides EMI immunity on noisy industrial boards.
When using the internal oscillator in designs where UART communications are required, the trimmable internal oscillator accuracy (±2% to ±5% depending on trimming) limits baud-rate tolerance. For UART links requiring ±2% baud accuracy, expect to use the lower speed grades (e.g. 9600 baud at 2 MHz bus) or switch to an external crystal. The 10-bit ADC achieves INL/DNL within 1 LSB but the input leakage on analog-capable pins requires that the source impedance stay below 10 kohm to preserve ADC accuracy.
合規資訊
RoHS compliant per NXP product page. Not AEC-Q100 qualified - the MCL908QY4DWE is the commercial/industrial grade, not the automotive S-prefix variant. Reach, halogen-free, and conflict-mineral status were not explicitly stated in the verified web data and are marked 'unknown'. For full materials declaration, contact NXP.
