MC9S08QA2CPAE - 8-bit S08 MCU 2KB Flash 20MHz | NXP
MPN: MC9S08QA2CPAE ✗ انتهى عمره الإنتاجيMC9S08QA2CPAE نظرة عامة
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.
بدائل مباشرة لـ MC9S08QA2CPAE — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع MC9S08QA2CPAE (نفس عامل الشكل والبصمة) — يختلف في Package, Mounting Type, RAM, ADC, Communication.
MC9S08QA4CPAE
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC9S08QA2CDWE
✅ بديل مباشر📋 بديل مرجعي (غير موجود في الكتالوج)
MC9S08QA4CFQE
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←MC9S08AC8CPGE
✅ بديل مباشر ⚠️ مواصفات غير مُتحقق منها📋 بديل مرجعي (غير موجود في الكتالوج)
MC9S08QA2CPAE الحدود القصوى والخصائص الكهربائية
| Core | HCS08 (8-bit) |
| CPU Maximum Frequency | 20 MHz bus / 40 MHz core |
| Program Memory | 2 KB Flash (2K x 8) |
| RAM | 128 B |
| جهد التغذية | 1.8 V to 3.6 V |
| درجة حرارة التشغيل | -40C to +85C (Industrial) |
| العلبة | 8-pin PDIP (PDIP-8) |
| نوع التركيب | 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 |
| حالة RoHS | Compliant |
تكوين أطراف MC9S08QA2CPAE
| دبوس 1 | VDD — Positive supply input (1.8 V to 3.6 V) |
| دبوس 2 | PTA0/ADP0 — General-purpose I/O / ADC channel 0 |
| دبوس 3 | PTA1/ADP1 — General-purpose I/O / ADC channel 1 |
| دبوس 4 | PTA2/RESET_b — General-purpose I/O / active-low reset input |
| دبوس 5 | VSS — Ground reference |
| دبوس 6 | PTA3/SWD_CLK — General-purpose I/O / SWD clock for debug |
| دبوس 7 | PTA4/SWD_DIO — General-purpose I/O / SWD data for debug |
| دبوس 8 | PTA5/ADP5 — General-purpose I/O / ADC channel 5 |
التطبيقات النموذجية
MC9S08QA2CPAE مناسب لـ 6 التطبيقs: 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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
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.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ MC9S08QA2CPAE — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | 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 |
أبرز الفروقات
- Lowest-cost 8-bit S08 in PDIP-8 with 2 KB Flash (مقابلMC9S08QG4CPAE)
- Direct same-family drop-in upgrade path to 4 KB Flash (مقابلMC9S08QA4CPAE)
- Surface-mount alternative on the same silicon (مقابلMC9S08QA2CDWE)
ملاحظات التصميم
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.
معلومات الامتثال
RoHS compliant per NXP product page. Not AEC-Q100 qualified - not suitable for automotive applications. Halogen-free status not explicitly published in verified data.
