MC908QY4CDTR2 - 8-bit HC08 MCU, 4KB Flash, 8MHz | NXP
MPN： MC908QY4CDTR2 ⚠ 最後購買機會MC908QY4CDTR2 概覽
A microcontroller is a single-chip computer that integrates a CPU, memory, and peripheral interfaces onto one die, allowing engineers to build embedded control systems with minimal external components. The HC08 family, in turn, is a sub-family of 8-bit microcontrollers within the broader category of microcontrollers (MCUs), which themselves are a sub-category of integrated circuits (ICs) in the semiconductor taxonomy. Microcontroller -> 8-bit MCU -> HC08 family -> M68HC08 family -> NXP/Freescale MCU portfolio.
Key features include 4KB (4K x 8) FLASH program memory, an 8MHz bus clock, an on-chip oscillator, multiple timer modules, and low-power operating modes suitable for battery-powered embedded applications. The TSSOP-16 footprint provides a compact surface-mount form factor, while the industrial temperature grade supports operation in harsh environments.
Technically, the device integrates 128 bytes of RAM, an 8-bit ADC on select variants, and a 4-channel 16-bit timer. The CPU08 core executes the standard HC08 instruction set with enhanced addressing modes, allowing code compatibility with existing M68HC08 development tools. Built-in monitor ROM enables in-system programming and debugging via a single-wire interface.
Typical applications include low-cost consumer electronics, white goods control boards, lighting controllers, sensor signal conditioning, simple motor control, and battery-powered IoT edge nodes where cost and power efficiency outweigh the need for higher processing throughput.
When designing with this MCU, account for the 8MHz maximum clock and 4KB program memory ceiling - these bound the firmware complexity. External pull-ups on the IRQ/TEST pins are required for normal operation, and the integrated voltage regulator and brown-out reset must be configured per the datasheet for reliable cold-start behaviour.
This page consolidates distributor pricing, lifecycle status, drop-in compatible alternatives and design considerations that are not all present in the manufacturer datasheet alone, giving engineers a single reference for sourcing and substitution decisions.
直接替換替代品，適用於 MC908QY4CDTR2 — 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： MC908QY4CDTR2 （相同外形與佔位） — 差異在於 Package, RAM.
MC908QY4CDTE
✅ 直接替換📋 參考替代品（不在目錄中）
MC908QY2CDTR2
✅ 直接替換📋 參考替代品（不在目錄中）
MC908QY1CDTR2
✅ 直接替換📋 參考替代品（不在目錄中）
MC908QT4AFRE
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC9S08QD4VSC
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC908QY4CDTR2 最大額定值與電氣特性
| Manufacturer | NXP Semiconductors (formerly Freescale Semiconductor) |
| Family | M68HC08 / HC08Q |
| Core | CPU08 (8-bit CISC, Von Neumann) |
| Program Memory | 4 KB (4K x 8) FLASH |
| RAM | 128 B |
| Maximum CPU Frequency | 8 MHz |
| 供應電壓 | 2.7 V to 5.5 V |
| 工作溫度 | -40 C to +85 C (Industrial) |
| 封裝 | 16-pin TSSOP |
| 安裝類型 | Surface Mount |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65 mm |
| Number of Terminals | 16 |
| Temperature Grade | INDUSTRIAL |
| AEC-Q100 | Not qualified |
MC908QY4CDTR2 腳位配置
| 腳位 1 | IRQ/TEST — External interrupt request / test mode entry |
| 腳位 2 | VDD — Positive supply voltage |
| 腳位 3 | PTA0 — Port A bit 0 / timer channel |
| 腳位 4 | PTA1 — Port A bit 1 / timer channel |
| 腳位 5 | PTA2 — Port A bit 2 |
| 腳位 6 | PTA3 — Port A bit 3 |
| 腳位 7 | VSS — Ground reference |
| 腳位 8 | PTB0 — Port B bit 0 |
| 腳位 9 | PTB1 — Port B bit 1 |
| 腳位 10 | PTB2 — Port B bit 2 |
| 腳位 11 | PTB3 — Port B bit 3 |
| 腳位 12 | PTB4 — Port B bit 4 |
| 腳位 13 | PTB5 — Port B bit 5 |
| 腳位 14 | RESET — Active-low reset input |
| 腳位 15 | OSC1 — Crystal oscillator input |
| 腳位 16 | OSC2 — Crystal oscillator output |
典型應用
MC908QY4CDTR2 適用於 6 應用s: White Goods Control Boards, LED Lighting Controllers, Battery-Powered IoT Sensor Nodes, Simple Motor Control (BLDC / Stepper), Consumer Electronics User Interface, Industrial Sensor Signal Conditioning.
White Goods Control Boards
The MC908QY4CDTR2's 4 KB FLASH, 8 MHz CPU08 core and industrial -40 C to +85 C temperature grade make it a fit for low-cost washing machine, dishwasher and refrigerator control boards. Its 16-pin TSSOP footprint places all GPIO and timer channels within reach of relays, triacs and sensor front-ends. Compared with more modern Cortex-M0+ parts it lacks DMA and sophisticated peripherals, but for deterministic control loops in a noisy motor environment the HC08 core's simple interrupt model and integrated monitor ROM reduce firmware complexity. Designers use it with the on-chip 16-bit timer for triac zero-crossing control and the ADC channel for temperature sensing.
推薦
LED Lighting Controllers
For LED driver secondary-side control in dimmable luminaires, the MC908QY4CDTR2 offers sufficient CPU bandwidth at 8 MHz to manage PWM dimming, DALI or 0-10 V analog interfaces and basic thermal foldback. Its 2.7 V to 5.5 V supply range simplifies integration with both 3.3 V and 5 V analog front-ends, while the integrated timer module generates glitch-free PWM at frequencies up to several kHz. The TSSOP-16 package fits within small driver enclosures. The HC08 architecture keeps firmware deterministic for lighting-up so hand-off between dim and on states is smooth without RTOS overhead.
推薦
Battery-Powered IoT Sensor Nodes
The MC908QY4CDTR2's low-power HC08 core and modest 8 MHz ceiling suit coin-cell or two-AA sensor endpoints where duty-cycled wake-up dominates energy budget. Its FLASH-resident monitor ROM allows field firmware updates via a single-wire interface, useful for deployed sensor fleets that must be reconfigured without disassembly. With 4 KB of code space and 128 B of RAM, the device can host small protocol stacks (e.g. simplified ZigBee or proprietary sub-GHz MAC) and run interrupt-driven sampling loops. The TSSOP-16 footprint eases integration onto small sensor PCAs.
推薦
Simple Motor Control (BLDC / Stepper)
For cost-sensitive BLDC or unipolar stepper drivers in appliances and small fans, the MC908QY4CDTR2's 16-bit timer and PWM outputs provide commutation control and current-mode regulation without DSP overhead. The HC08 CPU08 core executes six-step commutation tables in real time at 8 MHz, while GPIO pins map directly to FET half-bridge gate drivers. Its industrial temperature grade supports under-hood or enclosed motor environments. The 4 KB FLASH boundary fits typical BLDC state-machine firmware; designers seeking more headroom migrate to the S08QE family.
推薦
Consumer Electronics User Interface
HMI boards in microwave ovens, coffee makers and entry-level audio peripherals frequently adopt the MC908QY4CDTR2 to drive 7-segment or matrix LED displays, decode capacitive touch via software scanning and manage buzzer PWM tones. The 8 MHz CPU08 core handles multiplexed display refresh at low perceived flicker, while the 16-pin TSSOP package leaves enough GPIO for keypad scanning. Its 2.7 V to 5.5 V supply allows direct connection to single-cell Li-ion or USB-derived rails without an additional LDO.
推薦
Industrial Sensor Signal Conditioning
For 4-20 mA loop-powered transmitters, thermocouple amplifiers and load-cell digitizers, the MC908QY4CDTR2 provides a low-cost CPU08 host that performs linearisation and HART or Modbus framing in firmware. Its industrial temperature grade, 5 V tolerance and integrated 16-bit timer support deterministic sampling for IEC 60584 thermocouple tables. The 4 KB FLASH boundary accommodates look-up tables and small protocol stacks, while the TSSOP-16 footprint suits the small form factor of loop-powered heads. Designers value the part's long-term availability through authorised stockists.
推薦
推薦產品摘要
工程參考資料，適用於 MC908QY4CDTR2 — 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 | MC908QY4CDTE | MC908QY2CDTR2 | MC908QY1CDTR2 | MC908QT4AFRE | MC9S08QD4VSC |
|---|---|---|---|---|---|---|
| Package | TSSOP-16 | TSSOP-16 - same | TSSOP-16 - same | TSSOP-16 - same | TSSOP-16 - same | TSSOP-16 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Program Memory (FLASH) | 4 KB | 4 KB | 2 KB | 1 KB | 4 KB | 4 KB |
| Maximum CPU Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Core | CPU08 (HC08) | CPU08 (HC08) | CPU08 (HC08) | CPU08 (HC08) | CPU08 (HC08) | S08 |
| 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 | 1.8 V to 3.6 V |
| Temperature Grade | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) | Industrial (-40 C to +85 C) |
| Lifecycle Status | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Last-time-buy | Active |
主要差異化特點
- 4 KB FLASH provides twice the code space of MC908QY2 in the same footprint (對比MC908QY2CDTR2)
- HC08 core compatibility preserves existing CPU08 firmware investment (對比MC9S08QD4VSC)
- Industrial -40 C to +85 C temperature grade for harsh-environment designs (對比MC908QY1CDTR2)
設計說明
Add a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 2) and a 10 uF bulk capacitor on the same node to suppress FLASH write current spikes. Estimated: the on-chip FLASH programming current peaks around 10 mA during sector writes, so the bulk reservoir must recharge faster than the next sector write to avoid VDD droop below 2.7 V. A ferrite bead on the supply trace may be required if the board shares a rail with inductive loads.
Route the OSC1/OSC2 crystal traces (pins 15-16) symmetrically and keep them short (<5 mm), surrounded by a ground guard ring. Avoid routing noisy digital signals (PWM, motor drive) parallel to the crystal traces. Place the RESET pull-up (typically 10 kohm to VDD) within 5 mm of pin 14, and add a 100 nF capacitor from RESET to ground for noise immunity in industrial environments.
Do not leave the IRQ/TEST pin (pin 1) floating - the HC08 enters monitor mode when this pin is held low at reset, which can lock production units in bootstrap. Always provision a pull-up resistor (10 kohm to VDD) and ensure no source can drive the pin low during power-up. Confirmed by the M68HC08Q datasheet: floating IRQ/TEST causes unreliable reset behaviour on a small percentage of parts.
When using PTA0-PTA3 (pins 3-6) as timer/PWM outputs for triac or FET gate drive, add a 33 ohm series resistor close to the MCU pin to dampen ringing caused by long PCB traces and gate capacitance. For PTB0-PTB5 (pins 8-13) used as keypad inputs, enable the internal pull-ups in firmware or add external 47 kohm pull-ups to prevent floating inputs that could trigger spurious interrupts in noisy industrial environments.
合規資訊
RoHS, REACH, lead-free and halogen-free status not stated in the verified web data; consult the NXP material declaration or lot-specific CoC for definitive compliance. Industrial temperature grade only - not AEC-Q100 qualified.