MC908QC8CDSE - 8KB Flash 8-Bit HC08 MCU 20-TSSOP | NXP
部品番号: MC908QC8CDSE ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.12 | $6.12 |
| 10 | $5.48 | $54.80 |
| 100 | $4.85 | $485.00 |
| 500 | $4.2 | $2,100.00 |
| 1,000 | $3.65 | $3,650.00 |
MC908QC8CDSE 概要
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (FLASH/ROM for program storage and RAM for data), and programmable I/O peripherals on a single silicon die. The HC08 core is a CISC (Complex Instruction Set Computer) architecture that traces its lineage to the Motorola 6800 and offers compact code density, deterministic interrupt response, and a mature toolchain. The MC908QC8CDSE belongs to the broader category hierarchy: microcontroller -> embedded processor -> microprocessor -> semiconductor IC.
Key features include 8KB FLASH program memory with in-application programming support, 256 bytes of RAM, 12 general-purpose I/O pins, an internal oscillator, a 4-channel 8-bit timer, and a serial communications interface module. The device operates from a 2.7V to 5.5V supply range, supporting both 3.3V and 5V system rails common in industrial and appliance designs.
Architecturally, the MC908QC8CDSE uses the M68HC08 CPU core with a 16-bit stack pointer, 16-bit index register (H:X), and a BCD-friendly instruction set. The integrated FLASH controller supports byte-erase and page-erase operations, and the security feature prevents unauthorized memory read-back for IP protection in commercial products.
Typical applications include consumer appliance control (washing machines, microwave ovens, HVAC thermostats), battery chargers, small motor control, sensor signal conditioning front-ends, and any cost-sensitive 8-bit embedded task previously served by HC05 or HC11 designs. The 20-TSSOP footprint is friendly to hand-soldered prototypes and high-volume wave-solder production.
When designing with this device, ensure that the supervisor / reset pin is properly decoupled and that the FLASH programming voltage is sourced from the internal charge pump rather than an external supply, unless the application requires monitor mode entry. For new designs, evaluate the MC9S08 family for improved low-power modes and wider peripheral selection.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet, giving embedded engineers a one-stop reference for the MC908QC8CDSE.
ドロップイン代替品: MC908QC8CDSE — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: MC908QC8CDSE （同一形状・フットプリント） — 相違点: Package, Maximum Clock Frequency, Core, MSL Level.
クイック比較ツール — 並列比較する代替部品を選択:
MC908QC16CDSE
✅ ドロップイン✓ 在庫あり
$1.65 / 個
データシートを見る →MC908QC8CDTE
✅ ドロップイン✓ 在庫あり
$2.2 / 個
データシートを見る →MC908QC16VDSE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908QC8CDRE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908QC8MDSE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC68HC908QC8DSE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908QC8CDSE 最大定格＆電気的特性
| Core | HC08 |
| Processor Series | HC08QC |
| データバス幅 | 8 bit |
| Program Memory Size | 8 KB (8K x 8) FLASH |
| RAM Size | 256 B |
| 最大クロック周波数 | 8 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Number of I/O Pins | 13 (max, varies by package) |
| パッケージ | 20-TSSOP (4.40 mm body width) |
| 実装タイプ | Surface Mount |
| 動作温度範囲 | -40 C to +85 C (industrial) |
| Instruction Set Architecture | CISC (M68HC08) |
| MSLレベル | 3 (168 hours) |
MC908QC8CDSE ピン構成
| ピン 1 | IRQ — External interrupt request input |
| ピン 2 | PTA0/TCLK — Port A bit 0 / Timer clock input |
| ピン 3 | PTA1 — Port A bit 1 |
| ピン 4 | VSS — Ground |
| ピン 5 | PTA2 — Port A bit 2 |
| ピン 6 | PTA3 — Port A bit 3 |
| ピン 7 | PTA4 — Port A bit 4 |
| ピン 8 | PTA5 — Port A bit 5 |
| ピン 9 | PTA6 — Port A bit 6 |
| ピン 10 | PTA7 — Port A bit 7 |
| ピン 11 | PTB0 — Port B bit 0 |
| ピン 12 | PTB1 — Port B bit 1 |
| ピン 13 | PTB2 — Port B bit 2 |
| ピン 14 | PTB3 — Port B bit 3 |
| ピン 15 | PTB4 — Port B bit 4 |
| ピン 16 | PTB5 — Port B bit 5 |
| ピン 17 | PTB6 — Port B bit 6 |
| ピン 18 | PTB7 — Port B bit 7 |
| ピン 19 | RST — Active-low reset input |
| ピン 20 | VDD — Positive supply voltage |
主な用途
MC908QC8CDSE の用途: 6 件s: White-Goods Appliance Control, Battery Charger Control, HVAC Thermostat Front-End, Small Motor Control (Brushed DC, Stepper), Sensor Signal Conditioning Front-End, Low-End Industrial Control Boards.
White-Goods Appliance Control
The MC908QC8CDSE fits white-goods appliance controllers because it integrates an HC08 core, 8KB FLASH, 256 bytes RAM, and industrial -40 to +85 C temperature support in a low-cost 20-TSSOP. Embedded in washing-machine, dishwasher, and microwave main boards, it handles keypad scanning, LED/LCD drive, relay switching, and triac-based heater control. With its 2.7-5.5V supply, the device interfaces directly with 5V triac optocouplers and 3.3V sensors without level shifters. Compared to newer ARM Cortex-M0 parts, the MC908QC8CDSE has smaller code footprint, lower unit cost, and decades of proven field reliability in high-volume appliance designs.
おすすめ
Battery Charger Control
The MC908QC8CDSE is well-suited for lead-acid and NiMH charger control because its 8-bit ADC, GPIO-driven PWM-style charging phases, and 8 MHz HC08 core allow accurate CC/CV algorithm execution. The wide 2.7-5.5V supply tolerates battery voltage variations during charge cycles, while 256 bytes of RAM is enough to track SoH timers and battery temperature profiles. Placed on the charger main board, the MCU samples battery voltage, current shunt, and NTC thermistor inputs and modulates a power-MOSFET or relay via GPIO. Engineers value the FLASH in-circuit programming for field firmware updates on charger firmware revisions.
おすすめ
HVAC Thermostat Front-End
The MC908QC8CDSE works well in residential and light-commercial HVAC thermostats because its GPIO count, internal oscillator, and 5V tolerance enable direct NTC thermistor and relay drive without external components. The HC08 core executes PID-style temperature loops while the 8KB FLASH stores weekly schedules, setpoint tables, and hysteresis curves. Compared with discrete logic designs, the integrated MCU reduces BOM cost and PCB area, and the FLASH-backed non-volatile setpoints survive power outages. The 20-TSSOP package footprint allows the board to fit behind standard wall-mount thermostat backplates.
おすすめ
Small Motor Control (Brushed DC, Stepper)
The MC908QC8CDSE handles low-cost brushed-DC and unipolar stepper motor control in applications such as valve actuators, small fans, and toys. Its GPIO-driven H-bridge interface and PWM-emulation via timer ticks give precise duty-cycle control at 8 MHz instruction rate. With 256 bytes RAM, the part tracks position counters and ramp profiles for trapezoidal acceleration, while FLASH stores lookup tables for non-linear load compensation. Compared to dedicated motor-control ICs, the MC908QC8CDSE offers greater firmware flexibility at lower unit cost in low-power (<30W) motor systems.
おすすめ
Sensor Signal Conditioning Front-End
The MC908QC8CDSE serves as a smart sensor front-end, digitizing analog signals from strain gauges, photodiodes, and load cells via its ADC and transmitting results over SCI/SPI to a host controller. The HC08's deterministic interrupt response ensures low-latency sampling at fixed intervals, critical for vibration and flow-rate measurement. With FLASH-backed calibration constants, each unit can store factory-specific linearization curves in non-volatile memory. Compared to fully analog signal chains, the MCU-based design reduces component count and supports in-field recalibration through the FLASH programming interface.
おすすめ
Low-End Industrial Control Boards
The MC908QC8CDSE is widely used in simple industrial control boards such as conveyor timers, relay logic replacements, and small PLC-style I/O cards. Its 13 GPIO pins drive indicator LEDs, keypads, and SSR outputs, while the FLASH supports ladder-logic-style boolean evaluation in C. The 8 MHz clock and HC08 CISC ISA deliver more than enough throughput for scan-cycle times below 10 ms in multi-channel I/O applications. Compared to discrete 74-series logic, the MC908QC8CDSE reduces PCB real-estate, simplifies firmware updates, and adds diagnostic LEDs via GPIO.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: MC908QC8CDSE — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | MC908QC16CDSE | MC908QC8CDTE | MC908QC16VDSE | MC68HC908QC8DSE |
|---|---|---|---|---|---|
| Package | 20-TSSOP (4.40 mm) | 20-TSSOP (4.40 mm) - same | 20-TSSOP (4.40 mm) - same | 20-TSSOP (4.40 mm) - same | 20-TSSOP (4.40 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC08QC (CISC) | HC08QC (CISC) | HC08QC (CISC) | HC08QC (CISC) | HC08 (CISC) |
| Program Memory | 8 KB FLASH | 16 KB FLASH | 8 KB FLASH | 16 KB FLASH | 8 KB FLASH |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
主な差別化要因
- Drop-in scalable FLASH density within the same 20-TSSOP footprint （vs MC908QC8CDSE vs MC908QC16CDSE)
- Identical die under both MC and MC68HC part numbers （vs MC908QC8CDSE vs MC68HC908QC8DSE)
- Tape-and-reel option available for high-volume assembly （vs MC908QC8CDSE (tube) vs MC908QC8CDRE (T&R))
設計ノート
Decouple the VDD pin with a 100 nF ceramic capacitor placed within 5 mm of the package pin, and add a 10 uF bulk capacitor near the regulator output. The HC08QC core draws brief current spikes during FLASH writes and during oscillator startup, and insufficient decoupling can cause spurious brown-out resets. For battery-powered designs, gate the LDO enable pin through a GPIO so the MCU can enter STOP mode and drop quiescent current to single-digit microamps.
Keep the RST pin trace short and surround it with a ground guard ring if the board has switching power or relay coils nearby. The HC08QC reset input is sensitive to fast transients; in noisy industrial environments, add an external RC delay (10 kohm + 1 nF) on RST to lengthen the reset pulse and ensure clean oscillator startup before code execution begins. Pull IRQ high with a 10 kohm resistor to avoid spurious interrupts from floating inputs.
Do not assume that all 20-TSSOP HC08QC devices share identical option-register defaults - the MC908QC8CDSE suffix letters encode mask-set options for oscillator trim, COP watchdog, and LVI threshold. When migrating firmware between QC8 and QC16 variants, validate the option-register settings in the CONFIG registers before relying on default behavior. Also, monitor-mode entry requires a high-voltage (VHV) pulse on the IRQ pin; never drive IRQ above VDD or the part can latch up.
The HC08 GPIO edges have typical rise/fall times of 10-25 ns at 5V; for long PCB traces (>50 mm) add a 33 ohm series resistor to dampen ringing on clock and PWM-like outputs. Avoid routing HC08 I/O directly next to AC mains or relay-coil traces; even with optocouplers on the output side, capacitive coupling can inject glitches into the GPIO inputs and cause false triggering in interrupt-driven firmware.
コンプライアンス情報
RoHS / REACH status not stated in the provided distributor snippets. Lead-free per NXP packaging. AEC-Q100 not qualified (industrial-grade part). Conflict-minerals compliance per NXP standard policy.
