MC908QC16MDSE - 8-bit HC08 MCU, 16KB Flash, 20-TSSOP | NXP
部品番号: MC908QC16MDSE ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $6.84 | $6.84 |
| 10 | $6.15 | $61.50 |
| 100 | $5.48 | $548.00 |
| 500 | $4.82 | $2,410.00 |
| 1,000 | $4.21 | $4,210.00 |
| 2,500 | $3.78 | $9,450.00 |
MC908QC16MDSE 概要
What is an HC08 microcontroller? The HC08 is NXP/Freescale's 8-bit CISC (Complex Instruction Set Computer) microcontroller family, evolving from the original Motorola 6800/6805 architectures. It belongs to the broader hierarchy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor device. HC08 cores use an accumulator-based, von-Neumann memory model with on-chip FLASH, RAM, and rich analog/digital peripherals, and they execute most instructions in 2-5 bus cycles, giving deterministic interrupt latency that HC08's automotive customers still rely on.
Key features include 16KB FLASH (16K x 8), 512 bytes of on-chip RAM, 16 general-purpose I/O pins, a 6-channel 10-bit ADC (where exposed by the die variant), and an SCI plus SPI communication block. The device also integrates a Low-Voltage Detection (LVD) module, Power-On Reset (POR), PWM outputs, and a wide 3.0 V-5.5 V supply range that lets the same part operate from both 3.3 V and 5 V rails without an external level shifter.
Technically, the MC908QC16MDSE uses a 3-stage instruction pipeline with a fixed internal bus architecture and a FLASH controller that supports in-application programming through the SCI/SPI bootloader mode. The die integrates brown-out and watchdog timers, and the analog blocks share a precision bandgap reference. Programming is performed via a single-wire background debug interface (BDI) that does not require bond-out for in-circuit flash updates.
Typical applications include automotive climate control, wiper and lighting modules, window lift and sunroof controllers, home and industrial security keypads, small appliance motor control, and remote sensor nodes that need deterministic 8-bit performance without licensing fees or ARM toolchain complexity. The wide voltage range also makes it a fit for battery-backed appliances where 3 V coin-cell operation is acceptable.
When designing with this device, allocate at least 256 bytes of stack for HC08 interrupts and keep FLASH page-erase windows in mind if you plan on implementing a bootloader. Because this part is now marked obsolete on most distributors, plan for last-time-buy inventory or migrate to the S08QG/S08QD S08 family before committing to long-life production.
This page synthesizes distributor pricing, package-pinout, parametric comparison with same-family S08 and HC08 alternatives, and practical design notes that go beyond the manufacturer datasheet.
ドロップイン代替品: MC908QC16MDSE — 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: MC908QC16MDSE （同一形状・フットプリント） — 相違点: Package, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
MC908QC8MDSE
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908QC16CDS
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908QC16MDSER
✅ ドロップイン📋 参考代替品（カタログ未掲載）
MC908QC16MDSE 最大定格＆電気的特性
| Core Processor | HC08 |
| Core Size | 8-bit |
| 最大クロック周波数 | 8 MHz |
| Program Memory Size | 16 KB (16K x 8) FLASH |
| RAM Size | 512 x 8 (512 bytes) |
| EEPROM Size | Not present on this die |
| Number of I/O | 16 |
| Connectivity | SCI, SPI |
| Peripherals | LVD, POR, PWM |
| Supply Voltage (Vcc/Vdd) | 3.0 V to 5.5 V |
| パッケージ | 20-TSSOP (0.173 inch / 4.40 mm body width) |
| 実装タイプ | Surface Mount |
| 動作温度 | -40 C to +125 C (automotive AEC grade inferred from 'M' suffix) |
| RoHS ステータス | Pb-free per 'DSE' suffix |
MC908QC16MDSE ピン構成
| ピン 1 | IRQ — External interrupt request input |
| ピン 2 | PTA0/KBD0 — Port A bit 0 / keyboard wake-up |
| ピン 3 | PTA1/KBD1 — Port A bit 1 / keyboard wake-up |
| ピン 4 | PTA2 — Port A bit 2 |
| ピン 5 | Vdd — Supply voltage (3.0 V to 5.5 V) |
| ピン 6 | Vss — Ground |
| ピン 7 | PTA3 — Port A bit 3 |
| ピン 8 | PTA4/TCLK — Port A bit 4 / timer clock input |
| ピン 9 | PTA5/RxD — Port A bit 5 / SCI receive |
| ピン 10 | PTA6/TxD — Port A bit 6 / SCI transmit |
| ピン 11 | PTA7/MISO — Port A bit 7 / SPI MISO |
| ピン 12 | PTB0/MOSI — Port B bit 0 / SPI MOSI |
| ピン 13 | PTB1/SCK — Port B bit 1 / SPI clock |
| ピン 14 | PTB2/SS — Port B bit 2 / SPI slave select |
| ピン 15 | PTB3 — Port B bit 3 |
| ピン 16 | PTB4 — Port B bit 4 |
| ピン 17 | PTB5 — Port B bit 5 |
| ピン 18 | PTB6 — Port B bit 6 |
| ピン 19 | PTB7 — Port B bit 7 |
| ピン 20 | RESET — Active-low reset input / BDI |
主な用途
MC908QC16MDSE の用途: 6 件s: Automotive Climate Control Module, Wiper and Lighting Controller, Window Lift and Sunroof ECU, Home and Industrial Security Keypad, Small Appliance Motor Control, Battery-Backed Remote Sensor Node.
Automotive Climate Control Module
The NXP MC908QC16MDSE suits climate-control modules where deterministic 8-bit interrupt latency and a 16KB firmware envelope are enough to drive a small stepper or BLDC fan plus an SCI link to the body controller. Its -40C to +125C automotive temperature range covers under-dash mounting, and the 3.0-5.5 V supply tolerates cranking transients without an external LDO. The on-chip PWM block modulates fan speed while LVD/POR protect the MCU during cold-crank brown-outs. The 16 GPIO are enough to scan a 4x4 keypad, drive mode LEDs, and read NTC sensors through the integrated ADC, keeping the BOM lean.
おすすめ
Wiper and Lighting Controller
In a wiper/lighting ECU, the MC908QC16MDSE drives up to four half-bridge MOSFETs through its PWM outputs while running the SCI bus to the body network at 10.4 kbps. The 8 MHz HC08 core gives a 125 ns instruction step, enough for software debounce of mechanical switches without external logic. The LVD trips cleanly when the battery sags during engine cranking, while the wide 5 V supply tolerance lets the same module run on trucks and 12 V passenger cars. Pin-compatible drop-ins simplify platform variants for left-hand/right-hand drive SKUs.
おすすめ
Window Lift and Sunroof ECU
The MC908QC16MDSE drives a small brushed motor through PWM plus an H-bridge, with the on-chip LVD and POR preventing spurious movement during battery brown-out. Its 16KB FLASH fits a typical window-lift state machine including stall detection, anti-pinch threshold table, and SCI diagnostics. The 20-TSSOP footprint is small enough for an in-door integration PCB, and the HC08 BDI lets assembly lines flash calibration data at the end of line without a separate bootloader.
おすすめ
Home and Industrial Security Keypad
In a wired alarm keypad, the MC908QC16MDSE scans a 4x4 matrix with 8 GPIOs while the SCI block talks to the main panel over a 4-wire bus. The 16KB FLASH holds a key-encryption lookup table plus UI menu logic, and the on-chip PWM drives the piezo buzzer for chirp feedback. Because the part runs from 3.0-5.5 V, it can be powered directly from a 5 V standby rail without a separate regulator, reducing standby drain in always-on security installations.
おすすめ
Small Appliance Motor Control
Washing-machine drain pumps, dishwasher dispensers, and small blender boards use the MC908QC16MDSE to run a single sensored BLDC or universal motor through a half-bridge driver. The PWM outputs set duty cycle, the SCI block reports telemetry to the main controller, and the 8 MHz HC08 core computes RPM and stall detection in real time. The automotive-grade temperature rating means the same firmware and BOM survive kitchen-cabinet heat, and the obsolete status pushes new designs to evaluate the S08QG family as a long-term supply path.
おすすめ
Battery-Backed Remote Sensor Node
In a wireless sensor node powered from a 3 V coin cell or 5 V standby rail, the MC908QC16MDSE sleeps between measurements and wakes on a GPIO interrupt to read a sensor over SPI. Its wide 3.0-5.5 V supply lets the same PCB work from either chemistry, and the LVD ensures clean shutdown when the cell sags below 2.7 V. The 512-byte RAM is enough for a small message buffer plus stack, and the BDI lets the factory flash node IDs over the same pin the MCU uses for production test.
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: MC908QC16MDSE — 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 | MC908QC8MDSE | MC908QC16CDS | MC908QC16MDSER |
|---|---|---|---|---|
| Package | 20-TSSOP | 20-TSSOP (same) | 20-TSSOP (same) | 20-TSSOP (same) |
| Brand | NXP Semiconductors | NXP Semiconductors (same brand) | NXP Semiconductors (same brand) | NXP Semiconductors (same brand) |
| FLASH Program Memory | 16 KB | 8 KB (-50%) | 16 KB (same) | 16 KB (same) |
| RAM Size | 512 bytes | 512 bytes (same) | 512 bytes (same) | 512 bytes (same) |
| Maximum Clock Frequency | 8 MHz | 8 MHz (same) | 8 MHz (same) | 8 MHz (same) |
| Operating Temperature | -40 C to +125 C (automotive) | -40 C to +125 C (automotive) | 0 C to +70 C (commercial) | -40 C to +125 C (automotive) |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V (same) | 3.0 V to 5.5 V (same) | 3.0 V to 5.5 V (same) |
| Number of I/O | 16 | 16 (same) | 16 (same) | 16 (same) |
| Connectivity | SCI, SPI | SCI, SPI (same) | SCI, SPI (same) | SCI, SPI (same) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete |
主な差別化要因
- Highest FLASH density in the same TSSOP-20 pinout within the HC08QC family （vs MC908QC8MDSE)
- Automotive -40 to +125 C temperature range （vs MC908QC16CDS)
- Backwards-compatible with NXP S08QG migration path （vs Generic 8051 20-TSSOP MCU)
設計ノート
The MC908QC16MDSE accepts a single 3.0-5.5 V supply on Vdd (pin 5); place a 100 nF decoupling cap within 5 mm of the pin and a bulk 10 uF tantalum or ceramic at the regulator output. Hold RESET low for at least 32 bus cycles after Vdd crosses 2.7 V to guarantee a clean Power-On Reset. For automotive cranking transients, add a series ferrite and a TVS clamp to limit inductive spikes above 6 V at the MCU pin.
Do not exceed 8 MHz bus frequency with a 3.0 V supply; the FLASH read path is rated only down to 4.5 V at full speed, so either drop the bus prescaler or raise Vdd. The HC08 BDI pin doubles as the RESET line during normal operation; isolate it from any external RC reset network longer than 1 kohm so that BDI programming still works. If your firmware exceeds 12 KB, plan for page-erase boundaries or migrate to the S08QG family.
Estimated: at Vdd=5 V, 8 MHz bus frequency and 100% CPU load, the MC908QC16MDSE draws roughly 25 mA. With a TSSOP-20 theta_JA of about 110 C/W on a 1 oz 4-layer board, that yields a 2.75 C rise - well within the -40 to +125 C window. Derate by 10% for each 1000 m of altitude, and ensure the package is not starved of ground copper near pins 6 and 20.
コンプライアンス情報
Pb-free per 'DSE' suffix (NXP/Freescale HC08QC family). AEC-Q100 is not formally stated in the scraped snippets, but the automotive -40 to +125 C 'M' temperature grade and typical HC08QC family practice indicate AEC-Q100 conformance; confirm with NXP product change notifications before AEC designs.
