MC9S08QD2VSC - 8-bit S08 MCU, 2KB Flash, 16MHz, SOIC-8 | NXP
MPN： MC9S08QD2VSC ✓ 啟用中MC9S08QD2VSC 概覽
An 8-bit microcontroller (MCU) is a small, self-contained computing system-on-chip built around an 8-bit central processing unit, integrating program memory, working RAM, I/O peripherals, timers, and analog blocks into a single silicon die. The S08QD family sits at the very bottom of NXP's HCS08 architecture tree (HCS08 -> S08 -> S08QD -> MC9S08QD2), positioned for cost-sensitive embedded control in appliances, white goods, sensor interfaces, and consumer devices. The CPU executes the HC08 instruction set (with the added BGND instruction for background debugging), giving it a broad installed-code base and tool support.
Key features include 2KB of on-chip Flash (1.5KB usable with 0.5KB reserved for EEPROM-like emulation), 256 bytes of RAM, a 4-channel 10-bit analog-to-digital converter, up to 16MHz bus clock, and an asynchronous background debug interface. The device integrates a low-power wait and stop mode with wakeup from interrupts, plus internal pull-ups on selected I/O to reduce external component count. The 8-SOIC footprint keeps board area small for tightly-packed designs.
Technically, the MC9S08QD2VSC builds on the same HCS08 core that powers higher-tier S08 devices, so engineers can move up the family (QD4, SH, QG, AC) for more memory or peripherals without rewriting code. An integrated voltage regulator and brownout detector simplify the analog supply chain, while the internal clock source option removes the need for an external crystal in cost-sensitive applications.
Typical applications include small appliance control, BLDC motor commutation in fans and pumps, sensor conditioning, LED lighting controllers, and battery-powered consumer toys where low BOM cost and small footprint dominate the design. The 4-channel 10-bit ADC handles basic analog sensing without an external converter.
A key design consideration is to plan I/O pin count early: only 6 GPIO pins are exposed on the 8-SOIC package, so designs needing more I/O should consider the larger S08QD4 in TSSOP-16 or migrate to the S08AC family. The internal oscillator is sufficient for most tasks, but timing-critical serial communication may require an external reference.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 MC9S08QD2VSC — 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： MC9S08QD2VSC （相同外形與佔位） — 差異在於 Package, ADC, Flash Memory, RAM, Debug Interface.
MC9S08QD2CSC
✅ 直接替換✓ 有庫存
$2.0508 / 單位
查看資料表 →MC9S08QD4CSC
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QD4MSC
✅ 直接替換聯絡詢價
查看資料表 →MC9S08SH4MFK
✅ 直接替換聯絡詢價
查看資料表 →MC908QT2ACPE
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QD2VSC 最大額定值與電氣特性
| Core Architecture | HCS08 (enhanced HC08) |
| Program Memory (Flash) | 2 KB (2K x 8) |
| RAM | 256 bytes |
| CPU Clock (max) | 16 MHz |
| Operating Voltage | 2.7 V to 5.5 V |
| ADC | 4-channel, 10-bit |
| GPIO Pins | 6 |
| 封裝 | 8-SOIC (SO-8) |
| 安裝類型 | Surface Mount |
| MSL 等級 | 3 (168 hours) |
| 工作溫度 | -40 C to +85 C (V suffix = industrial) |
| RoHS 狀態 | Compliant |
| Debug Interface | Background Debug Mode (BDM) |
| Internal Oscillator | Yes (factory trimmed) |
MC9S08QD2VSC 腳位配置
| 腳位 1 | PTA0/TCLK — General-purpose I/O / Timer channel |
| 腳位 2 | PTA1 — General-purpose I/O |
| 腳位 3 | VDD — Power supply (2.7V to 5.5V) |
| 腳位 4 | PTA2 — General-purpose I/O |
| 腳位 5 | PTA3 — General-purpose I/O |
| 腳位 6 | BKGD/MS — Background Debug Mode / Mode Select |
| 腳位 7 | VSS — Ground |
| 腳位 8 | PTA4/RESET — General-purpose I/O / Reset |
典型應用
MC9S08QD2VSC 適用於 6 應用s: Small Appliance Control, BLDC Fan and Pump Motor Control, Sensor Interface Module, LED Lighting Controller, Battery-Powered Consumer Toy, Industrial Sensor Transmitter.
Small Appliance Control
The MC9S08QD2VSC's 2KB Flash, 256B RAM, and 6 GPIO pins fit small appliance controllers such as coffee makers, toasters, and rice cookers. Its 2.7V to 5.5V operating range covers both 3.3V logic and 5V relay-driver rails, while the 4-channel 10-bit ADC reads thermistor, mains-zero-cross, and user potentiometer inputs without external converters. The internal oscillator eliminates a crystal, reducing BOM cost in high-volume white goods. Place the MCU between the user keypad and the triac/MOSFET driver stage; the BDM interface enables in-circuit firmware updates on the production line.
推薦
BLDC Fan and Pump Motor Control
In low-cost BLDC fan and pump designs, the MC9S08QD2VSC's 16MHz HCS08 core and 4-channel 10-bit ADC handle back-EMF sensing and basic commutation logic. The 6 GPIO drive the gate-driver enable lines and read Hall-effect or sensorless BEMF comparators. Industrial temperature grade (-40C to +85C) supports under-hood or outdoor pump environments. Place a flyback diode and 10nF ceramic across each motor phase to suppress ESD; the BDM pin allows field firmware updates without removing the motor control board.
推薦
Sensor Interface Module
The MC9S08QD2VSC acts as a low-cost I2C/SPI-to-UART bridge or sensor-conditioning module, reading analog sensors through its 4-channel 10-bit ADC and forwarding data over SCI. With 256 bytes of RAM it can buffer a few sensor frames before forwarding, suiting low-rate environmental sensors. Operate from 3.3V to 5V single supply; the wide voltage range handles battery packs and regulated industrial rails equally. Add a 100nF decoupling cap adjacent to VDD pin, and route the BDM pin to a 2x5 header for production calibration.
推薦
LED Lighting Controller
PWM-driven LED controllers for accent, signage, and architectural lighting use the MC9S08QD2VSC's timer channels to generate dimming waveforms while the ADC reads ambient-light sensors or potentiometers. The 6 GPIO are sufficient for two-channel warm-white + cool-white PWM plus a status LED. Industrial temperature grade supports enclosed luminaire environments. Pair with a constant-current LED driver such as NXP's SSL5021; BDM enables last-mile firmware tuning of dimming curves without external programming.
推薦
Battery-Powered Consumer Toy
Battery-powered toys and personal-care devices use the MC9S08QD2VSC for low-cost motor control, button input, and LED feedback. The wait/stop low-power modes extend coin-cell or 2xAA battery life by dropping current into the microamp range between user events. Operating from 2.7V to 5.5V covers fresh and end-of-life alkaline cells. Connect a 100nF ceramic directly to VDD; use one GPIO to drive a low-side MOSFET for vibration motor PWM, and the ADC for battery-voltage monitoring.
推薦
Industrial Sensor Transmitter
Loop-powered or 24V industrial sensor transmitters use the MC9S08QD2VSC's wide 2.7V-5.5V supply and 4-channel 10-bit ADC to digitize pressure, temperature, or flow sensors. Industrial -40C to +85C temperature grade supports process-plant environments, while BDM simplifies factory calibration of the ADC transfer function. Place a TVS diode and bulk 10uF cap on VDD for surge immunity. The 2KB Flash holds the linearization lookup table and 4-20mA loop-control state machine.
推薦
推薦產品摘要
工程參考資料，適用於 MC9S08QD2VSC — 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 | MC9S08QD2CSC | MC9S08QD4CSC | MC9S08QD4MSC | MC9S08SH4MFK | MC908QT2ACPE |
|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 2 KB | 2 KB | 4 KB | 4 KB | 4 KB | 1.5 KB |
| RAM | 256 B | 256 B | 256 B | 256 B | 256 B | 128 B |
| CPU Clock (max) | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 3 MHz |
| Core | HCS08 | HCS08 | HCS08 | HCS08 | HCS08 | HC08 |
| Operating 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 |
| Temperature Range (suffix) | -40C to +85C (V industrial) | 0C to +70C (C commercial) | 0C to +70C (C commercial) | 0C to +70C (M suffix) | -40C to +85C (M industrial) | -40C to +85C (A automotive) |
主要差異化特點
- Industrial temperature grade with same SOIC-8 footprint (對比MC9S08QD2CSC)
- 2KB Flash at lower cost than 4KB family member (對比MC9S08QD4MSC)
- Modern HCS08 core vs legacy HC08 (對比MC908QT2ACPE)
- More GPIO than MC908 family entry-level parts (對比MC908QT2ACPE)
設計說明
Place a 100nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 3) with a short trace to VSS (pin 7). For noisy motor or relay loads, add a 10uF bulk tantalum or aluminum electrolytic capacitor on the supply rail within 25mm of the MCU. The internal voltage regulator requires minimum 2.7V at VDD; below this, Flash programming is inhibited.
Do not leave the BKGD/MS pin (pin 6) floating during normal operation; it must be pulled high through a 4.7k-10k resistor to VDD or the MCU may inadvertently enter background debug mode. The RESET/PTA4 pin (pin 8) needs at least a 10k pull-up if not used as GPIO, otherwise noise may trigger spurious resets.
Use a star-ground topology with VSS at pin 7 as the MCU ground reference. Avoid running high-current motor traces directly under the SOIC-8 footprint; route ADC input traces (PTA0-PTA3) away from switching signals. For the 4-channel ADC to achieve 10-bit accuracy, add a 10nF cap on each analog input pin and limit trace length to under 50mm.
Estimated: at 16MHz CPU clock and 5V supply, the MC9S08QD2VSC draws approximately 10-15mA active, dissipating 50-75mW in the SOIC-8 package. The 8-SOIC theta_JA is roughly 110 C/W, giving a junction temperature rise of 5-8C above ambient - well within the industrial -40C to +85C range. No heatsink is required.
Route the BKGD/MS line to a 2x5 0.05-inch header or test pad for in-circuit programming and debug. Keep the trace under 100mm to avoid signal integrity issues at BDM frequencies. If using the internal oscillator exclusively, you can omit the crystal footprint, saving PCB area and BOM cost in cost-sensitive designs.
合規資訊
RoHS compliant per NXP product page. Industrial temperature grade; not AEC-Q100 qualified - select AEC-Q100 qualified S08AC/S12Z variants for automotive.
