MC9S08QG8CFKE - 8KB Flash 20MHz S08 8-bit MCU | NXP 24-QFN
MPN: MC9S08QG8CFKE ⚠ Lần mua cuốiMC9S08QG8CFKE Tóm tắt
What is an 8-bit MCU? An 8-bit microcontroller unit is a single-chip computer that executes instructions 8 bits wide, balancing low power consumption, deterministic behavior, and code density. The HCS08 core advances the legacy HC08 instruction set with the BGND instruction and a background debugging system, placing the MC9S08QG8 in the hierarchical taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC.
Key features include 1.8V to 3.6V single-supply operation, an internal clock source with an analog-to-digital converter (ADC), timers, an inter-integrated circuit (I2C) interface, a serial peripheral interface (SPI), and a serial communications interface (SCI/UART). The 24-QFN-EP (4x4 mm) package with exposed thermal pad provides a low thermal resistance path for moderately loaded applications while keeping board footprint to a 16 mm² area.
Technically, the MC9S08QG8CFKE implements the HCS08 CISC architecture with BSET/BCLR bit manipulation instructions, single-wire background debug mode (BDM), and an interrupt controller. Up to six general-purpose I/O ports plus dedicated peripheral pins enable flexible peripheral multiplexing. On-chip peripherals include a 10-bit ADC, two timers (TPM), I2C, SPI, and SCI. The device supports low-power STOP and WAIT modes for battery-powered designs.
Typical applications include consumer electronics remote controls, low-power sensor nodes, white goods user interfaces, and any small-form-factor battery-powered product needing 8-bit deterministic control. Designers select this part when cost and footprint dominate over raw CPU throughput.
A key design tip: route the BDM (background debug mode) signals to a 2-pin header for in-system programming and debug. Place the exposed pad (EP) on a continuous ground plane for thermal dissipation and ground return.
This page synthesizes NXP distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet summary block.
Bộ thay thế dễ dàng lắp đặt cho MC9S08QG8CFKE — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với MC9S08QG8CFKE (cùng hình factor và footprint) — khác nhau ở Package, Mounting Type, Core, Debug Interface, RAM.
MC9S08QG8CFFER
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S08QG8MPBE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S08QG4CFDE
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC9S08QD4CSC
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S08SH4CFK
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9RS08KB8CWJ574
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →MC9S08QG8CFKE Tỷ lệ tối đa & tính chất điện
| Product Type | 8-bit Microcontroller (MCU) |
| Core | HCS08 (enhanced HC08 with BGND instruction) |
| Program Memory (Flash) | 8 KB |
| RAM | 512 B |
| Maximum CPU Frequency | 20 MHz |
| Supply Voltage Range | 1.8 V to 3.6 V |
| Hộp | 24-QFN-EP (4x4 mm) |
| Serial Interfaces | I2C, SPI, SCI (UART) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant |
Cấu hình chân MC9S08QG8CFKE
| Chân 1 | PTA5/TCLK2/IRQ — Port A bit 5 / Timer clock input 2 / external interrupt |
| Chân 2 | PTA4/TCLK1 — Port A bit 4 / Timer clock input 1 |
| Chân 3 | PTA3/TCLK2 — Port A bit 3 / Timer clock input 2 / optional alt |
| Chân 4 | PTA2/SDA — Port A bit 2 / I2C SDA |
| Chân 5 | PTA1/SCL — Port A bit 1 / I2C SCL |
| Chân 6 | PTA0/TPMCH0 — Port A bit 0 / TPM channel 0 |
| Chân 7 | VDD — Supply voltage (1.8 V to 3.6 V) |
| Chân 8 | VSS — Digital ground |
| Chân 9 | PTB7/ADP7 — Port B bit 7 / ADC channel ADP7 |
| Chân 10 | PTB6/ADP6 — Port B bit 6 / ADC channel ADP6 |
| Chân 11 | PTB5/ADP5 — Port B bit 5 / ADC channel ADP5 |
| Chân 12 | PTB4/ADP4 — Port B bit 4 / ADC channel ADP4 |
| Chân 13 | PTB3/SCL — Port B bit 3 / I2C SCL (alt) |
| Chân 14 | PTB2/SDA — Port B bit 2 / I2C SDA (alt) |
| Chân 15 | PTB1/ADP1 — Port B bit 1 / ADC channel ADP1 |
| Chân 16 | PTB0/ADP0 — Port B bit 0 / ADC channel ADP0 |
| Chân 17 | PTC1/RX — Port C bit 1 / SCI RX |
| Chân 18 | PTC2/TX — Port C bit 2 / SCI TX |
| Chân 19 | PTC3/MISO — Port C bit 3 / SPI MISO |
| Chân 20 | PTC4/MOSI — Port C bit 4 / SPI MOSI |
| Chân 21 | PTC5/SCK — Port C bit 5 / SPI SCK |
| Chân 22 | RESET — Reset input, bidirectional with BDM |
| Chân 23 | BKGD/MS — Background debug / mode select (BDM programming) |
| Chân 24 | PTC6 — Port C bit 6 / general-purpose I/O |
| Chân 25 | EP — Exposed thermal pad - solder to PCB ground plane |
Ứng dụng tiêu biểu
MC9S08QG8CFKE phù hợp cho 7 Áp dụngs: Battery-Powered Remote Control, Wireless Sensor Node, White Goods User Interface Panel, Small Motor Control (FAN / Pump), Medical Infusion Pump User Interface, Industrial Sensor / Counter Module, IoT Smart-Home Appliance Controller.
Battery-Powered Remote Control
The MC9S08QG8CFKE fits battery-powered remote controls because its 1.8V to 3.6V supply range aligns with two AAA cells, while the HCS08 core's STOP mode (sub-uA quiescent) extends battery life. The 8KB Flash accommodates proprietary infrared protocol stacks and button-debounce state machines; 512B RAM is sufficient for typical scan-matrix logic. Compared to a 32-bit MCU, the 8-bit core's deterministic interrupt latency prevents missed button-press glitches. The 24-QFN-EP 4x4 mm package fits inside a slim handheld remote housing, with a single ADC channel reading battery voltage for low-battery warning. The I2C peripheral drives an optional OLED status display, and the BDM pin enables factory-line firmware update. NXP part S9S08AW60E5MFGE is a sibling that can also serve low-power remote applications.
Được đề xuất
Wireless Sensor Node
The MC9S08QG8CFKE is well-suited for low-end wireless sensor nodes where its 20 MHz HCS08 core provides fast wake, sample, transmit, and sleep cycles. The integrated 10-bit ADC reads temperature or environmental sensors, and the SPI peripheral drives sub-GHz transceivers like the MC12311. With 8KB Flash for application firmware and 512B RAM for buffering one or two samples, the part fits typical sensor-node codebases. The 1.8V supply allows direct connection to a single Li-MnO2 coin cell. The exposed-pad QFN-EP package gives excellent thermal grounding for transmitter-induced heating. BDM enables field firmware update via a 2-pin header. Companion NXP S9S08DZ60F2MLHR can be used for higher-end sensor hubs requiring CAN connectivity.
Được đề xuất
White Goods User Interface Panel
The MC9S08QG8CFKE drives white-goods user interfaces where its 8-bit core runs deterministic keypad scanning, LED PWM dimming, and display control. The 24-QFN-EP package fits behind a glass keypad panel; six I/O ports drive 7-segment displays via SPI daisy-chained LED drivers. The 8KB Flash supports multilingual UI lookup tables, and 512B RAM holds a frame buffer for a small character LCD. The 20MHz bus clock keeps 50/60Hz mains-zero-cross detection accurate for TRIAC firing. The internal analog comparator (where present) provides hardware over-temperature trip. AEC-Q100 not applicable - this is a consumer-grade part. Companion NXP MC9S08AC8MFGE is a pin-compatible sibling in the AC family for richer UI builds.
Được đề xuất
Small Motor Control (FAN / Pump)
The MC9S08QG8CFKE controls small brushless-DC or brushed-DC fans and pumps where its TPM modules generate complementary PWM up to 20MHz and the ADC samples back-EMF for sensorless commutation. The 8KB Flash fits proprietary closed-loop RPM firmware, while 512B RAM supports a small state machine for soft-start. The 1.8V minimum supply supports direct 3.3V regulator or Li-ion operation, and the QFN-EP exposed pad dissipates ~500 mW comfortably. The 5V-tolerant I/O (via built-in ESD structures) drives external gate drivers. Software-based field-oriented control (FOC) fits inside 8KB on simpler 1-pulse motors. Companion NXP MC56F8037VLH delivers true DSP performance for higher-end BLDC; S912XEQ512J2MAA is a 16-bit HCS12 upgrade path.
Được đề xuất
Medical Infusion Pump User Interface
The MC9S08QG8CFKE serves medical infusion pumps and bedside device user-interface panels where its HCS08 core executes keypad scanning, alarm generation, and OLED updates with deterministic timing. The 8KB Flash runs safety-rated keypad debounce and lock-out state machines; the 10-bit ADC reads the user-selected flow rate from a rotary encoder. Note this is a consumer-grade part not IEC 60601 qualified; refer to NXP medical-grade Freescale parts for life-support. The 1.8V to 3.6V supply facilitates battery-only operation during patient transport. The QFN-EP exposed pad gives solid ground return for the TFT display's EMI. Companion NXP MC9S12H256VFVE is a 16-bit upgrade for full safety-ICU-class infusion pumps.
Được đề xuất
Industrial Sensor / Counter Module
The MC9S08QG8CFKE fits industrial sensor and counter modules that need 8-bit logic in a 24-QFN-EP footprint for DIN-rail enclosures. The 10-bit ADC reads 4-20 mA current loops via shunt, the TPM module counts pulses from a flow or revolution sensor, and the SCI peripheral drives an RS-485 transceiver for Modbus RTU. The 20MHz HCS08 core resolves input transitions within 50 ns for accurate pulse counting. The 1.8V minimum supply is compatible with 24V step-down industrial rails. The exposed-pad QFN-EP improves thermal performance for hot enclosures. Companion NXP MC9S08AW32VFGE is a pin-compatible sibling with more memory for protocol stacks, and S9S08AW32E5MPUE provides extra peripherals for gateway designs.
Được đề xuất
IoT Smart-Home Appliance Controller
The MC9S08QG8CFKE controls IoT smart-home appliances such as connected thermostats, blinds controllers, and smart plugs. Its I2C peripheral drives a temperature/humidity sensor; its SPI peripheral connects to a sub-GHz radio module for low-power mesh networking. The 1.8V to 3.6V supply range supports direct coin-cell operation, and the 20MHz core executes protocol stacks (Zigbee/Thread/BLE) bridging logic. 8KB Flash accommodates commission firmware plus a couple of profile templates. The 24-QFN-EP 4x4 mm fits on the back of a US-style wall switch. Note: this is an 8-bit MCU not suited for native BLE radio handling but works well as a host MCU under a coprocessor. Companion NXP MK22FN1M0AVLK12 is the ARM Cortex-M4 upgrade path for native-radio designs.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC9S08QG8CFKE — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | MC9S08QG8CFFER | MC9S08QG8MPBE | MC9S08QG4CFDE | MC9S08QD4CSC | MC9S08SH4CFK |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 24-QFN-EP (4x4 mm) | 24-QFN-EP (4x4 mm) - same | 24-QFN-EP (4x4 mm) - same | 24-QFN-EP (4x4 mm) - same | 24-QFN-EP (4x4 mm) - same | 24-QFN-EP (4x4 mm) - same |
| Core | HCS08, 8-bit, 20MHz | HCS08, 8-bit, 20MHz | HCS08, 8-bit, 20MHz | HCS08, 8-bit, 20MHz | HCS08, 8-bit, 16MHz | HCS08, 8-bit, 40MHz |
| Flash | 8 KB | 8 KB | 8 KB | 4 KB (-50%) | 4 KB (-50%) | 4 KB (-50%) |
| RAM | 512 B | 512 B | 512 B | 512 B | 256 B (-50%) | 128 B (-75%) |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 1.8 V to 3.6 V | 2.7 V to 5.5 V |
| Pin-out compatibility (drop-in) | N/A (this part) | 100% drop-in (same silicon, different suffix) | 100% drop-in (same family packaging) | Drop-in with firmware rescale (smaller Flash) | Drop-in with firmware rescale | Pin-compatible footprint, code rewrite required |
Bảo phân biệt quan trọng
- Last production run is the QG8 density tier within S08QG family (vsMC9S08QG4CFDE)
- 1.8V minimum supply supports single Li-ion or 2x alkaline cell operation (vsMC9S08SH4CFK)
- Same-family compatibility with NXP S08/S12/S16 upgrade paths (vsARM Cortex-M0 third-party MCUs)
Ghi chú thiết kế
The 24-QFN-EP (4x4 mm) package exposes the paddle at pin 25 to a top-side thermal pad. Solder it to a continuous ground copper pour spanning at least 1 square inch across the top and inner PCB layers. For 8-bit MCU loads (<= 50 mW total power), the exposed pad is more important for ground integrity than thermal dissipation, but it does lower junction-to-ambient thermal resistance significantly.
Place a 0.1 uF ceramic capacitor as close as possible to the VDD pin (pin 7) with the loop area minimized. Add a 4.7 uF to 10 uF bulk capacitor at the regulator output feeding VDD. The MC9S08QG8CFKE's internal brown-out reset and low-voltage detect reset the part cleanly at voltage transients. Apply decoupling separately to the analog AVDD reference if used, with a ferrite bead or resistor between digital VDD and analog AVDD.
Route the BDM (BKGD/MS, pin 23) signal with a 10 kohm pull-up to VDD and a footprint for a 2-pin 0.1 inch header or pogo-pad test land. This enables in-system programming without needing to remove the microcontroller. Trace the BDM line away from high-current switching signals and motor PWM lines to avoid programming glitches during production test.
Estimate: Pin 22 (RESET) is bidirectional and shares the BDM line. Do not pull RESET low externally without a 4.7 kohm or larger series resistor to avoid interfering with BDM operation. Initializing peripherals in the wrong order after STOP mode recovery can leave I2C or SPI peripherals stuck; clear the IICSC and SPISC registers explicitly after wake-up. Check the BDIV/bus-frequency ratio on switch to FEI mode.
Thông tin tuân thủ
RoHS compliant per DigiKey listing. Not AEC-Q100 qualified - this is a commercial/industrial grade part. NXP Discontinuance and Replacement notice pending - check NXP product page for last-time-buy deadline.
