MC9S08RE8CFJER - 8-Bit S08 MCU 8KB Flash 8MHz LQFP-32 | NXP
料号： MC9S08RE8CFJER ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $6.32 | $6.32 |
| 10 | $5.74 | $57.40 |
| 100 | $5.1 | $510.00 |
| 500 | $4.61 | $2,305.00 |
| 1,000 | $4.18 | $4,180.00 |
MC9S08RE8CFJER 概述
An 8-bit microcontroller (MCU) is a single-chip computer that integrates an 8-bit CPU core, program memory (Flash/ROM), data memory (RAM), and peripheral set (timers, ADC, communication interfaces) into one IC. The 8-bit class sits below 16-bit and 32-bit MCUs in computational throughput but excels at deterministic real-time control, lower power, and lower unit cost, making it ideal for sensor interfacing, keypad scanning, simple motor control, and battery-powered appliances. Within NXP's portfolio hierarchy, 8-bit MCU -> HCS08 family -> S08RE sub-family -> low-power series.
Key features of the MC9S08RE8CFJER include an internal oscillator, low-voltage detection (LVD), power-on reset (POR), pulse-width modulation (PWM) outputs, and a watchdog timer (WDT). It supports multiple low-power modes (wait, stop, and run) and operates from a 2.5V/3.3V supply, which suits handheld instruments and remote controls. The 32-LQFP package provides easy hand-soldering and breadboard-friendly pin spacing.
The MC9S08RE8CFJER uses the HCS08 CPU core, which is a fully static CISC design with a BCD arithmetic extension and a 16-bit stack pointer. BDM (Background Debug Mode) is supported through a single-wire interface, enabling in-circuit programming and debug without an expensive emulator. The Flash memory supports in-application reprogramming via the built-in Flash controller, allowing firmware updates in the field.
Typical applications include universal remote controls, handheld instruments, portable consumer devices, sensor signal conditioning nodes, and low-power wireless control peripherals. The combination of small Flash footprint, low active current, and rich interrupt-driven peripherals makes it well-suited for products where BOM cost and battery life dominate.
A critical design tip is to add a 0.1uF decoupling capacitor between VDD and VSS as close as possible to the IC, plus a bulk capacitor (4.7uF to 10uF) on the supply rail. When configuring the internal oscillator for low-power wakeup timing, verify the trim register value against the datasheet's ICS (Internal Clock Source) section, as default trim may yield inaccurate timing.
This page synthesizes distributor pricing, drop-in NXP/Freescale S08RE family alternatives, and practical design notes not found in a single distributor listing or the manufacturer datasheet alone.
直接替换替代料： MC9S08RE8CFJER ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： MC9S08RE8CFJER （相同外形与封装尺寸） ——差异在于 Package, Architecture, Flash Memory, Lifecycle Status, Manufacturer.
快速对比工具——选择替代料号进行并排对比：
MC9S08RE16CFJER
✅ 直接替换📋 参考替代料（不在目录中）
MC9S08RE8CFJE
✅ 直接替换📋 参考替代料（不在目录中）
MC9S08RE32CFJER
✅ 直接替换📋 参考替代料（不在目录中）
MC9S08RG32CFJE
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →MC9S08FL8CLC
✅ 直接替换📋 参考替代料（不在目录中）
MC9S08RE8CFJER 最大额定值与电气特性
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Series | S08RE |
| Core | HCS08 CISC 8-bit |
| Program Memory Size | 8 KB (8K x 8) Flash |
| RAM Size | 1 KB (1K x 8) |
| Maximum CPU Frequency | 8 MHz |
| Number of I/O Lines | 25 |
| 电源电压 | 2.5 V / 3.3 V |
| 封装 | 32-LQFP (7x7 mm) |
| 安装类型 | Surface Mount |
| Oscillator Type | Internal |
| Peripherals | LVD, POR, PWM, WDT |
| 工作温度 | -40 C to +85 C |
| Packaging | Tape & Reel (TR) |
| Compliance | RoHS compliant, PB-Free |
MC9S08RE8CFJER 引脚配置
| 引脚 1 | PTA0/KBIP0/TCLK — Port A bit 0 / keyboard interrupt / timer clock |
| 引脚 2 | PTA1/KBIP1 — Port A bit 1 / keyboard interrupt |
| 引脚 3 | PTA2/KBIP2 — Port A bit 2 / keyboard interrupt |
| 引脚 4 | PTA3/KBIP3 — Port A bit 3 / keyboard interrupt |
| 引脚 5 | VDDA — Analog supply voltage |
| 引脚 6 | VSSA — Analog ground |
| 引脚 7 | PTB0 — Port B bit 0 |
| 引脚 8 | PTB1 — Port B bit 1 |
| 引脚 9 | PTB2 — Port B bit 2 |
| 引脚 10 | PTB3 — Port B bit 3 |
| 引脚 11 | PTB4 — Port B bit 4 |
| 引脚 12 | PTB5 — Port B bit 5 |
| 引脚 13 | PTB6 — Port B bit 6 |
| 引脚 14 | PTB7 — Port B bit 7 |
| 引脚 15 | PTC0 — Port C bit 0 |
| 引脚 16 | PTC1 — Port C bit 1 |
| 引脚 17 | PTC2 — Port C bit 2 |
| 引脚 18 | PTC3 — Port C bit 3 |
| 引脚 19 | PTC4 — Port C bit 4 |
| 引脚 20 | PTC5 — Port C bit 5 |
| 引脚 21 | VDD — Digital supply voltage |
| 引脚 22 | VSS — Digital ground |
| 引脚 23 | BKGD/MS — Background Debug Mode / Mode Select |
| 引脚 24 | RESET — External reset input (active low) |
| 引脚 25 | PTC6 — Port C bit 6 |
| 引脚 26 | PTC7 — Port C bit 7 |
| 引脚 27 | PTD0 — Port D bit 0 |
| 引脚 28 | PTD1 — Port D bit 1 |
| 引脚 29 | PTD2 — Port D bit 2 |
| 引脚 30 | PTD3 — Port D bit 3 |
| 引脚 31 | PTD4 — Port D bit 4 |
| 引脚 32 | PTD5 — Port D bit 5 |
典型应用
MC9S08RE8CFJER 适用于 6 应用s: Universal Remote Controls, Handheld Instruments and Meters, Portable Consumer Devices, Sensor Signal Conditioning Nodes, Low-Power Wireless Control Peripherals, Appliance Keypad and User Interface.
Universal Remote Controls
The MC9S08RE8CFJER fits universal remote control designs because its 8 KB Flash easily holds IR protocol stacks (NEC, RC5, SIRC) and button-scan firmware, while 1 KB RAM suffices for state buffers. The 8 MHz HCS08 core delivers cycle-accurate IR carrier generation at 38 kHz to 56 kHz without DMA overhead. Low-power Stop and Wait modes reduce standby current to microamp levels for years of battery life on a coin cell. The 25 GPIO lines are sufficient for 4x5 key matrices and LED indicators.
推荐
Handheld Instruments and Meters
Handheld DMMs, clamp meters, and environmental testers benefit from the MC9S08RE8CFJER's low active power and integrated peripherals including PWM (for buzzer drive) and WDT (for fault recovery). The 8-bit ADC-free design pairs well with external sigma-delta converters via SPI or I2C. The 32-LQFP package offers easy hand-rework and a compact PCB footprint. Internal oscillator trim eliminates the need for an external crystal, reducing BOM cost and saving PCB space.
推荐
Portable Consumer Devices
For portable consumer devices such as fitness bands, electronic toys, and personal care tools, the MC9S08RE8CFJER provides 8 KB Flash for application logic, low Stop-mode current for battery longevity, and PWM channels for motor or LED brightness control. The internal oscillator eliminates the BOM cost of an external resonator. BDM single-wire debug allows rapid firmware iteration during development. Supply voltage tolerance down to 2.5V supports direct Li-ion battery connection through a low-dropout regulator.
推荐
Sensor Signal Conditioning Nodes
Industrial and IoT sensor nodes use the MC9S08RE8CFJER as a low-cost signal conditioning front-end that reads analog sensors, performs local filtering, and forwards processed data over UART or SPI to a host controller. The 8 MHz core handles 100 Hz to 1 kHz sample rates with simple FIR or moving-average filters in firmware. The WDT protects unattended nodes from firmware lockups in the field. Low-power modes extend battery life in remote deployments.
推荐
Low-Power Wireless Control Peripherals
The MC9S08RE8CFJER can act as a control host for low-power wireless modules in wireless key fobs, remote switches, and home automation bridges. The HCS08 core handles button polling, link-layer state machine, and encryption helpers within 8 KB Flash. Sleep current below 1 uA in Stop mode preserves coin-cell batteries for multi-year deployments. PWM channels drive status LEDs and provide feedback to the user during pairing operations.
推荐
Appliance Keypad and User Interface
Microwave ovens, washing machines, and HVAC controllers use the MC9S08RE8CFJER as a user-interface MCU handling 4x4 or 5x5 key matrix scanning, 7-segment or character LCD drive, and beeper control. The 25 GPIO lines are sufficient for key matrix plus LED indicators. PWM channels generate beeper tones and triac-zero-cross timing for heater control. Internal oscillator with ICS trim keeps BOM cost low while maintaining timing accuracy for debounce algorithms.
推荐
推荐产品汇总
工程参考数据： MC9S08RE8CFJER ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | MC9S08RE16CFJER | MC9S08RE8CFJE | MC9S08RE32CFJER | MC9S08RG32CFJE | MC9S08FL8CLC |
|---|---|---|---|---|---|---|
| Package | 32-LQFP (7x7) | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same | 32-LQFP (7x7) - same | 32-LQFP - same family |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HCS08 8-bit | HCS08 8-bit | HCS08 8-bit | HCS08 8-bit | HCS08 8-bit | HCS08 8-bit |
| Flash Memory | 8 KB | 16 KB (+100%) | 8 KB (same) | 32 KB (+300%) | 32 KB (+300%) | 8 KB (same) |
| RAM | 1 KB | 1 KB | 1 KB | 1 KB or 2 KB | 2 KB | 1 KB |
| Max CPU Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 20 MHz |
| GPIO Count | 25 | 25 | 25 | 25 | 25 | 28 |
| Supply Voltage | 2.5 V to 3.3 V | 2.5 V to 3.3 V | 2.5 V to 3.3 V | 2.5 V to 3.3 V | 2.5 V to 3.3 V | 2.7 V to 5.5 V |
关键差异点
- Lowest Flash option in the S08RE LQFP-32 family （对比 MC9S08RE16CFJER)
- Smaller Flash than RG32 family （对比 MC9S08RG32CFJE)
- Tape & Reel packaging for high-volume manufacturing （对比 MC9S08RE8CFJE)
设计说明
Place a 0.1 uF decoupling capacitor as close as possible between each VDD/VSS pin pair (pins 21/22 and 5/6) to suppress high-frequency switching noise. Add a bulk 4.7 uF to 10 uF tantalum or ceramic capacitor on the main 3.3V supply rail within 25 mm of the IC. Use a ferrite bead in series with the supply if the MCU shares a rail with noisy loads (relays, motors).
Do not assume the internal oscillator runs at the datasheet's nominal frequency without calibration. Use the ICS trim register (ICSTRM and ICSSC) to trim the reference to within +/- 2% of the target frequency for accurate UART baud rates and ADC timing. After exiting Stop mode, allow 1 ms to 5 ms for the oscillator to stabilize before resuming timing-critical operations.
Keep the BKGD/MS pin trace short (under 50 mm) and away from high-frequency switching nodes to prevent debug interface noise. Route the RESET line with a pull-up resistor (typically 4.7 kOhm) directly to VDD, and place any reset capacitor close to the IC pin. Avoid running digital signal traces parallel to the analog VDDA/VSSA pins to prevent digital switching noise from coupling into the analog supply.
If using PWM outputs to drive inductive loads (relays, solenoids), add a flyback diode across the load and a snubber (100 ohm + 0.01 uF) if switching speeds exceed 1 kHz. For UART lines, ensure the baud-rate tolerance stays within +/- 2.5% to avoid framing errors. The HCS08 SCI peripheral has a built-in fractional baud-rate divider to assist with non-standard crystal frequencies.
合规信息
RoHS compliant per NXP product page and distributor listings (PB-Free designation). Not AEC-Q100 qualified; choose an automotive-grade S08 derivative if needed for vehicle applications.