MC9RS08KB8CTG - 8-bit RS08 MCU, 8KB Flash, 20MHz | NXP
料号： MC9RS08KB8CTG ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.66 | $1.66 |
| 10 | $1.49 | $14.90 |
| 100 | $1.27 | $127.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.93 | $930.00 |
MC9RS08KB8CTG 概述
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and peripherals such as timers, ADCs, and communication interfaces. The MCU sits below microprocessors and above discrete logic in the embedded hierarchy, and the RS08KB family is a flash-based, low-pin variant within the broader Freescale/NXP 8-bit and 32-bit automotive and industrial MCU portfolio.
Key features of the MC9RS08KB8CTG include an 8 KB Flash program memory, a 20 MHz RS08 core with BGND debug instruction, a single global interrupt vector, and operation across 2.7 V to 5.5 V supply range. The device integrates an analog-to-digital converter, timer modules, and serial communication blocks, supporting reduced system cost through peripheral integration. The TSSOP-16 footprint offers compact board placement suitable for space-constrained designs.
The RS08 core is a reduced-instruction-set variant of the HC08 family, retaining code efficiency and toolchain familiarity while trimming die size. On-chip hardware breakpoints and the BGND instruction simplify in-circuit debug via standard RS08 background debug tools, lowering the engineering effort required for firmware bring-up versus pure software emulation.
Typical applications include small home appliances, sensor interface modules, LED lighting controllers, low-end motor control signal boards, and industrial sensor hubs. The wide operating voltage and industrial temperature range suit automotive body and chassis subsystems as well as factory-automation peripherals.
When designing with this MCU, ensure decoupling capacitors are placed close to the VDD pins and that unused pins follow the datasheet recommendations to avoid spurious interrupts. Migrating from larger RS08KB family members preserves pin compatibility when staying within the same package.
直接替换替代料： MC9RS08KB8CTG ——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： MC9RS08KB8CTG （相同外形与封装尺寸） ——差异在于 Package, Core Processor, Peripherals, RAM Size, Debug Interface.
快速对比工具——选择替代料号进行并排对比：
MC9RS08KB4CWJ
✅ 直接替换✓ 有现货
$1.49 / 个
查看数据手册 →MC9RS08KA1CDBR
✅ 直接替换✓ 有现货
$2.05 / 个
查看数据手册 →MC9S08QE8CTG
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →MC9S08SH8MTG
✅ 直接替换✓ 有现货
$1.55 / 个
查看数据手册 →MC9S08PA8VLC
✅ 直接替换✓ 有现货
$1.84 / 个
查看数据手册 →MC9RS08KB8CTG 最大额定值与电气特性
| Core | RS08 (subset of HC08 with BGND) |
| 数据总线宽度 | 8 bit |
| Program Memory Size | 8 KB (8K x 8) Flash |
| Maximum CPU Frequency | 20 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V |
| 工作温度范围 | -40C to +85C |
| 封装 | 16-TSSOP (0.173", 4.40 mm width) |
| 安装类型 | Surface Mount |
| Interrupt Structure | Single global interrupt vector |
| Debug Interface | RS08 background debug (BGND instruction) |
| Peripherals | ADC, Timers, Communication interfaces (per datasheet) |
| RoHS 状态 | Compliant (per distributor listings) |
MC9RS08KB8CTG 引脚配置
| 引脚 1 | PTA0/KBIP0/TCLK0/ACMP+ — General I/O / keyboard interrupt / timer clock / analog comparator input |
| 引脚 2 | PTA1/KBIP1/TCLK1/ACMP- — General I/O / keyboard interrupt / timer clock / analog comparator input |
| 引脚 3 | PTA2/KBIP2 — General I/O / keyboard interrupt |
| 引脚 4 | PTA3/KBIP3/RESET_b — General I/O / keyboard interrupt / reset (bidirectional) |
| 引脚 5 | VDD — Power supply (2.7 V to 5.5 V) |
| 引脚 6 | VSS — Ground |
| 引脚 7 | PTB0/SCL — General I/O / I2C clock |
| 引脚 8 | PTB1/SDA — General I/O / I2C data |
| 引脚 9 | PTB2/RxD — General I/O / UART receive |
| 引脚 10 | PTB3/TxD — General I/O / UART transmit |
| 引脚 11 | PTC0/ADP0 — General I/O / ADC channel |
| 引脚 12 | PTC1/ADP1 — General I/O / ADC channel |
| 引脚 13 | PTC2/ADP2 — General I/O / ADC channel |
| 引脚 14 | PTC3/ADP3 — General I/O / ADC channel |
| 引脚 15 | BKGD/MS — Background debug / mode select |
| 引脚 16 | PTA4/KBIP4 — General I/O / keyboard interrupt |
典型应用
MC9RS08KB8CTG 适用于 6 应用s: Home Appliance Control, Sensor Interface Module, LED Lighting Controller, Low-end Motor Control Signal Board, Automotive Body Electronics Subsystem, Industrial Sensor Hub.
Home Appliance Control
The MC9RS08KB8CTG fits small home appliances such as coffee machines, microwave ovens, blenders, and small kitchen controllers where the firmware footprint stays under 8 KB Flash. Its 2.7 V to 5.5 V supply range and -40C to +85C industrial temperature make it tolerant of rectified mains-derived rails and warm internal environments. The 16-pin TSSOP provides adequate I/O for keypad scanning, LED indicator drive, and a UART link to control boards. Its RS08 core preserves HC08 code familiarity, allowing existing appliance firmware libraries to be re-used with minimal rewrite.
推荐
Sensor Interface Module
Industrial sensor-interface modules reading temperature, humidity, or proximity often need a small, deterministic 8-bit MCU to handle ADC sampling and simple protocol conversion. The MC9RS08KB8CTG's on-chip ADC and timers deliver deterministic sampling at the 20 MHz RS08 core, while the 8 KB Flash is sufficient for periodic calibration and protocol handling. The single global interrupt vector keeps the interrupt service routine overhead low, suitable for tight sensor-loop timing. The TSSOP-16 footprint mounts cleanly on compact daughter boards inside sensor housings.
推荐
LED Lighting Controller
In LED lighting controllers for architectural and residential dimming systems, the MC9RS08KB8CTG's 20 MHz core can drive PWM dimming channels while the on-chip ADC reads ambient light sensors and potentiometers. The 2.7 V to 5.5 V supply range supports direct connection to 5 V regulator outputs commonly used in LED driver stages. With 8 KB Flash the MCU fits full-color-mixing firmware plus simple DMX or 0-10 V protocol stacks. The TSSOP-16 package allows integration inside compact driver enclosures.
推荐
Low-end Motor Control Signal Board
The MC9RS08KB8CTG can act as a signal-board MCU on low-end motor-control assemblies such as small DC fans, pumps, or stepper-driven valves where a dedicated gate driver handles power conversion. The 20 MHz RS08 core computes commutation timing, while the 16-pin TSSOP exposes PWM-capable timers and a UART link to a host controller. The wide 2.7 V to 5.5 V supply and -40C to +85C range suit industrial cabinet environments. The compact Flash size intentionally forces firmware simplicity, which is appropriate for safety-critical signal logic.
推荐
Automotive Body Electronics Subsystem
In automotive body-electronics subsystems (mirror controllers, lighting modules, seat-position switches) the MC9RS08KB8CTG operates from a 5 V regulated battery rail, with industrial temperature tolerance covering cabin and under-hood-adjacent locations. The 16-pin TSSOP is small enough to fit behind mirror glass or inside a switch cluster. The RS08 core's HC08 instruction compatibility eases migration of legacy automotive firmware. For AEC-Q100-qualified variants, engineers should verify the specific NXP order code in the automotive portfolio.
推荐
Industrial Sensor Hub
Industrial sensor hubs that aggregate several analog or digital sensors on a single PCB benefit from the MC9RS08KB8CTG's on-chip timers, ADC, and serial interfaces. The MCU can read field sensors, run simple linearization, and forward processed data via UART/SPI to a higher-tier controller. The TSSOP-16 footprint is suitable for DIN-rail daughter boards, and the 2.7-5.5 V supply matches 24 V-bus-derived 5 V rails. The 8 KB Flash budget accommodates typical Modbus RTU or vendor-proprietary protocol stacks.
推荐
推荐产品汇总
工程参考数据： MC9RS08KB8CTG ——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 | MC9RS08KB4CWJ | MC9RS08KA1CDBR | MC9S08QE8CTG | MC9S08SH8MTG | MC9S08PA8VLC |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-TSSOP | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same | 16-TSSOP - same |
| Core | RS08 (20 MHz) | RS08 (20 MHz) | RS08 (20 MHz) | S08 (up to 50 MHz) | S08 (up to 40 MHz) | S08 PA (20 MHz) |
| Flash Size | 8 KB | 4 KB (-50%) | 1 KB (-87%) | 8 KB (same) | 8 KB (same) | 8 KB (same) |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.4 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Pin Count | 16 | 16 | 16 | 16 | 16 | 16 |
| Debug Interface | RS08 BGND | RS08 BGND | RS08 BGND | S08 BDM | S08 BDM | S08 BDM |
关键差异点
- RS08 core with HC08 superset instruction compatibility （对比 MC9RS08KA1CDBR)
- 8 KB Flash versus 4 KB in lower-tier RS08KB variants （对比 MC9RS08KB4CWJ)
- Wide 2.7 V to 5.5 V supply range with industrial temperature （对比 MC9S08QE8CTG)
设计说明
Place a 0.1 uF decoupling capacitor as close as possible to the VDD pin (pin 5) and VSS pin (pin 6), and a bulk 1 uF to 10 uF tantalum or ceramic on the supply rail. The MC9RS08KB8CTG operates from 2.7 V to 5.5 V; an LDO ahead of the MCU reduces ripple that couples into the ADC reference. Add a bulk capacitor at the regulator output to handle in-rush when the MCU wakes from stop modes.
Route the BKGD/MS pin (pin 15) directly to a debug header with a short, noise-free trace. Keep reset traces short and avoid routing them parallel to high-current switching lines. The TSSOP-16 footprint benefits from a small ground pour under the MCU and 0.1 uF bypass caps adjacent to each supply-adjacent pin to reduce EMI susceptibility and improve ADC accuracy.
Ensure unused pins are configured as outputs (or inputs with the internal pull-up enabled and externally terminated) per the datasheet, not left floating - floating inputs can drift into the linear region and draw extra current or trigger spurious interrupts. Do not exceed 5.5 V on any pin; the RS08KB is not 5 V tolerant on all digital pins when operating at lower VDD. Verify the reset pin is not driven externally during power-up to avoid locking the BGND debug mode.
For ADC applications, the MC9RS08KB8CTG's ADC reference stability directly affects conversion accuracy. Use a low-impedance reference decoupling network and avoid routing ADC inputs near switching nodes or PWM outputs. Use the smallest possible analog input bandwidth consistent with the signal of interest; additional input filtering reduces aliasing and improves effective resolution in noisy industrial environments.
合规信息
RoHS-compliant per distributor listings. AEC-Q100 qualification depends on specific variant - check NXP product page for automotive-grade ordering codes.
