MC9S08QA2CPAE - 8-bit S08 MCU 2KB Flash 20MHz | NXP
料号： MC9S08QA2CPAE ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.86 | $930.00 |
| 1,000 | $1.55 | $1,550.00 |
MC9S08QA2CPAE 概述
An 8-bit microcontroller (MCU) is a single-chip computer optimized for embedded control tasks, integrating a CPU, non-volatile program memory, volatile data memory, and peripherals such as timers, ADCs, and communication interfaces on one die. Within the broader semiconductor taxonomy, MCUs sit beneath microprocessors and alongside DSPs; the HCS08 core specifically targets cost-sensitive, deterministic control in appliance, consumer, and industrial sensing applications. The S08 instruction set is source-compatible with the legacy HC08 core, extended with the BGND instruction for background-debug-mode operation.
Key features of the MC9S08QA2CPAE include 2 KB of Flash program memory organized as 2K x 8, 128 B of on-chip RAM, an internal clock generator, an 8-channel 10-bit ADC, two timers (TPM), an SCI/UART, an SPI peripheral, and support for up to 32 interrupt/reset sources. The device offers two very low-power stop modes and a wait mode, with fast wake-up times suitable for battery-powered duty-cycled applications. On-chip debug and trim support enable field calibration without external programmers.
The S08QA architecture pairs a 40 MHz internal bus with a 20 MHz peripheral bus, allowing deterministic interrupt latency and predictable timer behavior. The Flash memory supports in-application programming via a software routine, and the on-chip voltage regulator maintains core logic across the full 1.8 V to 3.6 V supply range, eliminating the need for an external regulator in most designs.
Typical applications include low-end appliance controls, lighting ballasts, battery chargers, fan controllers, smoke detectors, simple sensor signal conditioners, and replacement of discrete logic in cost-sensitive industrial modules. The 8-pin PDIP form factor suits through-hole prototyping boards and legacy designs where hand-soldering or socketed parts are preferred.
When designing with this part, ensure the supply decoupling follows the manufacturer reference layout with a 100 nF ceramic capacitor within 5 mm of the VDD pin and a bulk 4.7 uF capacitor on the same rail. Avoid routing high-frequency signals near the oscillator pins to preserve ADC accuracy.
This page synthesizes distributor pricing, drop-in alternatives, application guidance, and design notes not found in any single manufacturer datasheet, supporting both new designs and legacy maintenance of installed S08QA sockets.
直接替换替代料： MC9S08QA2CPAE ——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： MC9S08QA2CPAE （相同外形与封装尺寸） ——差异在于 Package, Mounting Type, RAM, ADC, Communication.
快速对比工具——选择替代料号进行并排对比：
MC9S08QA4CPAE
✅ 直接替换✓ 有现货
$1.6667 / 个
查看数据手册 →MC9S08QA2CDWE
✅ 直接替换📋 参考替代料（不在目录中）
MC9S08QA4CFQE
✅ 直接替换✓ 有现货
$0.9 / 个
查看数据手册 →MC9S08AC8CPGE
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC9S08QA2CPAE 最大额定值与电气特性
| Core | HCS08 (8-bit) |
| CPU Maximum Frequency | 20 MHz bus / 40 MHz core |
| Program Memory | 2 KB Flash (2K x 8) |
| RAM | 128 B |
| 电源电压 | 1.8 V to 3.6 V |
| 工作温度 | -40C to +85C (Industrial) |
| 封装 | 8-pin PDIP (PDIP-8) |
| 安装类型 | Through-Hole |
| ADC | 10-bit, up to 8 channels |
| Timers | 2 x TPM (Timer/PWM Module) |
| Communication | 1 x SCI/UART, 1 x SPI |
| I/O Pins | Up to 6 general-purpose |
| Low-Power Modes | Stop1, Stop2, Wait |
| Voltage Detection | LVD with reset or interrupt |
| Interrupts | Up to 32 sources |
| RoHS 状态 | Compliant |
MC9S08QA2CPAE 引脚配置
| 引脚 1 | VDD — Positive supply input (1.8 V to 3.6 V) |
| 引脚 2 | PTA0/ADP0 — General-purpose I/O / ADC channel 0 |
| 引脚 3 | PTA1/ADP1 — General-purpose I/O / ADC channel 1 |
| 引脚 4 | PTA2/RESET_b — General-purpose I/O / active-low reset input |
| 引脚 5 | VSS — Ground reference |
| 引脚 6 | PTA3/SWD_CLK — General-purpose I/O / SWD clock for debug |
| 引脚 7 | PTA4/SWD_DIO — General-purpose I/O / SWD data for debug |
| 引脚 8 | PTA5/ADP5 — General-purpose I/O / ADC channel 5 |
典型应用
MC9S08QA2CPAE 适用于 6 应用s: Low-End Appliance Control, LED Lighting Drivers, Battery Chargers and Monitors, Fan and Pump Speed Controllers, Smoke and Gas Detectors, Industrial Sensor Signal Conditioners.
Low-End Appliance Control
The MC9S08QA2CPAE suits washing-machine control boards, microwave keypads, and rice-cooker boards where cost dominates and code density is modest. Its 2 KB Flash holds simple state machines and timer-driven firmware for relay and triac sequencing; the 8-pin PDIP package is hand-solderable for service technicians. The 1.8-3.6 V supply accepts rectified mains-derived rails, while the on-chip 10-bit ADC reads thermistor sensors with adequate resolution for NTC-based temperature control. The S08QA's two low-power stop modes extend standby time in always-connected appliance modules.
推荐
LED Lighting Drivers
In dimmable LED lamp controllers, the MC9S08QA2CPAE generates PWM on a single TPM channel to drive a buck/boost FET stage, while the ADC samples the dimmer signal and input voltage. The HCS08 core's deterministic interrupt latency keeps PWM edges jitter under 50 ns, eliminating visible flicker in commercial-grade fixtures. The 1.8-3.6 V supply powers directly from a low-voltage auxiliary winding, eliminating an extra regulator stage. The 8-pin PDIP package supports through-hole manufacturing flows still common in Asian lighting OEM lines.
推荐
Battery Chargers and Monitors
NiMH and single-cell Li-ion charger circuits use the MC9S08QA2CPAE to monitor voltage, current, and temperature while driving a charge FET via PWM. The on-chip 10-bit ADC samples current-sense and battery voltage at rates high enough to implement CC/CV charge profiles. The LVD block asserts reset on brownout, protecting cells from deep discharge. The Stop1 mode reduces quiescent current to the microamp range, extending shelf life in shipped-but-uninstalled products. Two-wire SWD allows firmware updates in the field without removing the module.
推荐
Fan and Pump Speed Controllers
Brushless DC and AC induction fan controllers rely on the MC9S08QA2CPAE to read back-EMF or Hall sensors, compute RPM, and modulate a TRIAC or FET driver. The 20 MHz bus speed provides 50 microsecond control loops for 25 kHz PWM, which is sufficient for small-impeller ceiling fans and PC case fans. The 8-pin PDIP footprint fits inside the fan hub with through-hole leads for strain relief. The wide -40C to +85C operating range covers attic and outdoor appliance environments.
推荐
Smoke and Gas Detectors
Photoelectric smoke detectors and household CO alarm front-ends use the MC9S08QA2CPAE to pulse an IR LED, digitize the photodiode return, and run a simple peak-detection algorithm. The two stop modes keep quiescent current under 5 microamp, supporting 10-year sealed-battery designs. The LVD with interrupt warns of end-of-life battery condition without forcing a full reset. The 8-pin PDIP remains the dominant package in this safety segment because through-hole leads survive wave-soldering and conformal coating.
推荐
Industrial Sensor Signal Conditioners
4-20 mA loop-powered transmitters and bridge-sensor signal conditioners use the MC9S08QA2CPAE to linearize RTD, thermistor, or strain-gauge inputs. The 10-bit ADC combined with the 1.8 V minimum supply supports battery- or loop-powered operation. The 8-pin PDIP allows the controller PCB to fit inside a standard sensor head enclosure with through-hole assembly. The 128 B RAM buffers calibration coefficients, while the 2 KB Flash holds the linearization polynomial and diagnostics routine.
推荐
推荐产品汇总
工程参考数据： MC9S08QA2CPAE ——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 | MC9S08QA4CPAE | MC9S08QA2CDWE | MC9S08QA4CFQE | MC9S08AC8CPGE |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Package | PDIP-8 | PDIP-8 - same footprint | SOIC-8 - same die | SOIC-8 - same family | PDIP-16 - different footprint |
| Program Memory | 2 KB Flash | 4 KB Flash | 2 KB Flash | 4 KB Flash | 8 KB Flash |
| RAM | 128 B | 128 B | 128 B | 128 B | 256 B |
| CPU Bus Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| 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 | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Lifecycle Status | NRND (End of Life announced) | NRND | NRND | NRND | Active |
| Approx Unit Price (qty 1) | $2.95 | $3.10 | $2.75 | $3.00 | $4.50 |
关键差异点
- Lowest-cost 8-bit S08 in PDIP-8 with 2 KB Flash （对比 MC9S08QG4CPAE)
- Direct same-family drop-in upgrade path to 4 KB Flash （对比 MC9S08QA4CPAE)
- Surface-mount alternative on the same silicon （对比 MC9S08QA2CDWE)
设计说明
Place a 100 nF X7R ceramic decoupling capacitor within 5 mm of the VDD pin and a bulk 4.7 uF electrolytic or tantalum on the same supply rail. The on-chip voltage regulator rejects high-frequency switching noise, but keep digital and analog grounds tied to a single VSS point to avoid ground loops.
Route the SWD_CLK and SWD_DIO signals (pins 6 and 7) away from the PTA2/RESET_b line to prevent in-circuit debug glitches from triggering resets. Keep analog ADC traces short and guarded with VSS on both sides if accuracy better than 8 ENOB is required at full-scale input.
Do not exceed 3.6 V on VDD - the S08QA core uses thin-oxide transistors and lacks 5 V tolerance. When migrating from HC08 designs, verify the BGND instruction handling; the HCS08 places BGND at opcode 0x00, and your existing assembler may treat 0x00 as a different mnemonic.
PDIP-8 has a theta-JA of approximately 100 C/W in still air, giving a junction-to-ambient rise of 50 C at 0.5 W dissipation. In sealed enclosures (e.g., detector heads) derate ambient to 60 C max, or migrate to an SOIC version with a copper pour to drop theta-JA closer to 60 C/W.
合规信息
RoHS compliant per NXP product page. Not AEC-Q100 qualified - not suitable for automotive applications. Halogen-free status not explicitly published in verified data.
