MC9S08QD4MPC - 8-bit HCS08 MCU, 4KB Flash, DIP-8 | NXP
MPN： MC9S08QD4MPC ✓ 啟用中MC9S08QD4MPC 概覽
An HCS08 microcontroller is a low-power, enhanced 8-bit CPU core derived from the legacy HC08 instruction set with the addition of the BGND instruction for background debug mode and a CISC architecture. Microcontrollers in this class sit beneath the broader category of embedded microcontrollers, themselves a subset of microprocessors and integrated circuits, and are typically deployed as the primary system controller in cost- and power-sensitive appliances, sensors, and human-interface devices where a 32-bit core would be overkill.
Key features include 4 KB of Flash program memory, 256 bytes of RAM, six general-purpose I/O pins, a 4-channel 10-bit successive-approximation ADC, and an on-chip clock generator that supports an external crystal or resonator. The CPU executes instructions from the HC08 instruction set augmented by BGND, runs at up to 16 MHz (8 MHz bus), and supports single breakpoint setting during in-circuit debugging plus two additional breakpoints in on-chip debug logic.
Typical applications include white-goods and small appliance controls, toys, low-end consumer electronics, LED lighting controllers, and battery-powered sensor nodes. The DIP-8 package makes it suitable for prototyping, breadboarding, education, and low-volume production runs where through-hole assembly is preferred over surface mount.
When designing with this part, ensure the supply voltage stays within the MCU's specified VDD range and that the background debug pins are reserved on the PCB for in-circuit programming access. The DIP-8 footprint is intentionally chosen for hand-solderable, hobbyist-friendly designs rather than high-density production.
This page synthesizes distributor pricing, drop-in same-package alternatives within the S08QD family, and practical design notes not collected in any single manufacturer document.
直接替換替代品，適用於 MC9S08QD4MPC — 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： MC9S08QD4MPC （相同外形與佔位） — 差異在於 Debug Interface, Package, Operating Temperature, Mounting Type, Core.
MC9S08QD2MPC
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QD4CPC
✅ 直接替換📋 參考替代品（不在目錄中）
MC9S08QD4VPC
✅ 直接替換聯絡詢價
查看資料表 →MC9S08QD2CPC
✅ 直接替換📋 參考替代品（不在目錄中）
S9S08QD4J2MSC
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC9S08QD4MPC 最大額定值與電氣特性
| Core | HCS08 (enhanced 8-bit) |
| Instruction Set | HC08 with BGND |
| Maximum CPU Frequency | 16 MHz (8 MHz bus) |
| Program Memory (Flash) | 4 KB |
| RAM | 256 bytes |
| ADC | 4-channel, 10-bit |
| General-Purpose I/O Pins | 6 |
| 封裝 | 8-pin PDIP (DIP-8, 0.300 inch / 7.62 mm) |
| 安裝類型 | Through-Hole |
| Debug Interface | Background Debug Mode (BDM), single breakpoint + 2 on-chip breakpoints |
| Clock Source | Internal oscillator, external crystal/resonator support |
| Family | S08QD (lowest-end S08 8-bit family) |
| Architecture | CISC |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
MC9S08QD4MPC 腳位配置
| 腳位 1 | PTB5/KBIP5/ADP5 — Port B bit 5 / Keyboard interrupt / ADC channel 5 (per datasheet) |
| 腳位 2 | PTB4/KBIP4/ADP4 — Port B bit 4 / Keyboard interrupt / ADC channel 4 |
| 腳位 3 | VDD — Supply voltage |
| 腳位 4 | VSS — Ground reference |
| 腳位 5 | BKGD/MS — Background Debug Mode / Mode Select |
| 腳位 6 | RESET — External reset input (active low) |
| 腳位 7 | PTB3/KBIP3/ADP3 — Port B bit 3 / Keyboard interrupt / ADC channel 3 |
| 腳位 8 | PTB2/KBIP2/TCLK — Port B bit 2 / Keyboard interrupt / Timer clock |
典型應用
MC9S08QD4MPC 適用於 7 應用s: White-Goods and Small Appliance Control, Toy and Low-End Consumer Electronics, LED Lighting Controllers, Battery-Powered Sensor Nodes, Hobbyist and Educational Projects, Human-Machine Interface (HMI) Panels, Replacement and Drop-in Sourcing.
White-Goods and Small Appliance Control
The MC9S08QD4MPC fits white-goods appliance control because its 4 KB Flash holds small fixed-function control loops and its 16 MHz HCS08 core delivers deterministic timing for relay and triac switching. The 4-channel 10-bit ADC reads temperature sensors (NTC), line-voltage zero-cross detectors, and potentiometer user inputs, while the 6 GPIOs drive LEDs, buzzers, and triac gates directly. Compared with a 32-bit Cortex-M0+, the S08QD saves cost and power for tasks that do not need a stack-heavy RTOS, keeping BOM under USD 3 even at 1-piece pricing.
推薦
Toy and Low-End Consumer Electronics
The MC9S08QD4MPC is widely used in toys and low-end consumer devices because its 8-pin PDIP package is breadboard- and hand-solder-friendly, and the 4 KB Flash is enough for sound sequencing, motor PWM, and LED animations. The internal oscillator eliminates external crystals in cost-sensitive designs, and the HCS08 BGND instruction allows in-circuit firmware updates during production. The DIP-8 form factor accelerates early-stage prototyping before committing to an SOIC-8 surface-mount layout for mass production.
推薦
LED Lighting Controllers
The MC9S08QD4MPC serves as a low-cost LED lighting controller using PWM on its GPIOs to drive MOSFET gate drivers for dimming and color-mixing RGB or white LEDs. The 4-channel 10-bit ADC samples ambient light sensors or potentiometer dim wheels at sufficient resolution for smooth fades, and the 16 MHz HCS08 core easily generates multi-channel PWM without hardware timer overflow. Low BOM cost (USD 1.92 per MCU at 1k quantity as of 2026-10-17) makes the S08QD family attractive for residential bulb and strip light designs.
推薦
Battery-Powered Sensor Nodes
The MC9S08QD4MPC suits simple battery-powered sensor nodes because the HCS08 core supports low-power stop and wait modes, and the internal peripherals do not require external components that would leak quiescent current. The 4-channel 10-bit ADC monitors battery voltage and analog sensors, while the BDM interface enables in-field firmware updates. The 8-pin PDIP package is convenient for laboratory and field-test fixtures; production variants move to the S08QD SOIC-8 siblings.
推薦
Hobbyist and Educational Projects
The MC9S08QD4MPC is a popular choice for teaching embedded systems because the 8-pin PDIP package fits standard breadboards and the NXP CodeWarrior toolchain supports the HCS08 core. The 4 KB Flash and 256 bytes of RAM teach students about resource-constrained firmware design without overwhelming them. The BGND background debug interface allows in-circuit debugging from a low-cost P&E Multilink or OSBDM programmer, making the S08QD family a staple in undergraduate microcontroller labs.
推薦
Human-Machine Interface (HMI) Panels
The MC9S08QD4MPC handles low-channel-count HMI panels where a few buttons, LEDs, and a potentiometer or NTC sensor are all that is required. The 4-channel 10-bit ADC reads the user input, while the 6 GPIOs drive indicator LEDs and read contact switches. With a 16 MHz HCS08 core, debounce and PWM-led update loops fit comfortably in 4 KB of Flash. Compared with larger S08 derivatives, the MC9S08QD4MPC keeps panel cost under USD 3 in single-piece quantities.
推薦
Replacement and Drop-in Sourcing
The MC9S08QD4MPC is frequently specified as a drop-in reference for the S08QD family when designers need a known-good, well-documented 8-bit MCU baseline. The same die is offered in 8-pin PDIP (MPC suffix), SOIC-8 (MSC suffix), and consumer/automotive temperature grades (CPC, VPC, and J2 suffixes), all electrically compatible. Engineers can prototype on the DIP-8 MC9S08QD4MPC and migrate to the SOIC-8 surface-mount variant without firmware changes.
推薦
推薦產品摘要
工程參考資料，適用於 MC9S08QD4MPC — 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 | MC9S08QD2MPC | MC9S08QD4CPC | MC9S08QD4VPC | MC9S08QD2CPC | S9S08QD4J2MSC |
|---|---|---|---|---|---|---|
| Package | 8-pin PDIP (DIP-8) | 8-pin PDIP (DIP-8) - same | 8-pin PDIP (DIP-8) - same | 8-pin PDIP (DIP-8) - same | 8-pin PDIP (DIP-8) - same | 8-pin SOIC-8 (not PDIP) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 4 KB | 2 KB | 4 KB | 4 KB | 2 KB | 4 KB |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Maximum CPU Frequency | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Core | HCS08 (8-bit) | HCS08 (8-bit) | HCS08 (8-bit) | HCS08 (8-bit) | HCS08 (8-bit) | HCS08 (8-bit) |
| ADC | 4-channel, 10-bit | 4-channel, 10-bit | 4-channel, 10-bit | 4-channel, 10-bit | 4-channel, 10-bit | 4-channel, 10-bit |
| Temperature Grade | Industrial | Industrial | Consumer/Extended | Extended (per V suffix) | Consumer/Extended | Automotive |
主要差異化特點
- Breadboard-friendly 8-pin PDIP through-hole package (對比MC9S08QD4MSC)
- 4 KB Flash for slightly larger control firmware (對比MC9S08QD2MPC)
- Industrial temperature grade baseline (對比MC9S08QD4CPC)
設計說明
The MC9S08QD4MPC supports multiple low-power modes (stop, wait). Decouple VDD (pin 3) with a 100 nF ceramic capacitor placed within 5 mm of the package, plus a 10 uF bulk capacitor on the supply rail. The internal voltage regulator draws a small quiescent current; for battery-powered designs, switch to stop mode between ADC samples to keep average current in the microamp range. Refer to the power-supply section of the MC9S08QD4 datasheet for the exact VDD min/max envelope.
Route the BKGD/MS line (pin 5) away from switching signals or analog inputs; this pin carries the background debug data and is sensitive to noise during in-circuit programming. Place a small series resistor (typically 4.7 kohm to 10 kohm) on RESET if the reset line is long or if the system shares the rail with inductive loads. The DIP-8 footprint is through-hole, so allocate standard 2.54 mm pitch pads with sufficient annular ring for hand soldering.
Do not assume all S08QD variants are identical - the trailing letter (M, C, V, J2) encodes temperature grade and qualification level. Cross-check the ordering code against the MC9S08QD4 datasheet before substituting. Also note that the MC9S08QD4MPC ships in 8-pin PDIP only; surface-mount designs should choose the MSC (SOIC-8) or DFN-suffix siblings instead. Always verify the Flash size in the part marking - 'QD2' is 2 KB and 'QD4' is 4 KB.
The 4-channel 10-bit ADC shares its input pins with Port B GPIOs. Configure unused ADC channels as digital outputs to avoid floating-input quiescent current. Acquire multiple ADC samples and average for noise rejection; the HCS08 ADC supports single- and multi-channel scan modes per the datasheet. For high-impedance sensors, enable the internal pull-up or add an external buffer to keep ADC input current within the datasheet limits.
合規資訊
RoHS and REACH compliance per NXP product page. Standard industrial temperature grade; not AEC-Q100 qualified. For automotive-grade equivalent on the same die, choose S9S08QD4J2 suffix variants.
