MC9S08AC48CFDE - 8-bit 40MHz 48KB Flash MCU | NXP
MPN: MC9S08AC48CFDE ✗ Cuối đờiMC9S08AC48CFDE Tóm tắt
An 8-bit microcontroller is a single-chip processor that executes instructions on 8-bit data words and integrates CPU, memory, and peripherals on one die. Within the system hierarchy, the HCS08 CPU sits at the core, surrounded by a bus matrix connecting Flash, RAM, and peripherals such as timers, serial interfaces, and ADC, forming a complete embedded power-and-control subsystem. The MC9S08AC48CFDE belongs to the S08AC family, the third family in the Flexis series, where 8-bit S08 devices are pin-, peripheral-, and tool-compatible with 32-bit ColdFire MCF51AC devices.
Key features include the 40 MHz HCS08 central processor unit, 48KB (48K x 8) Flash program memory with in-application reprogramming, 8KB RAM, and 38 general-purpose I/O. The wide 2.7V to 5.5V supply range allows direct operation from 3.3V and 5V rails, simplifying mixed-voltage industrial designs.
Technically, the HCS08 core is a fully static CISC CPU derived from the HC08 architecture, delivering up to 20 MHz internal bus throughput. The Flexis AC family shares a common peripheral set across 8-bit and 32-bit members, giving engineers a migration path from 8-bit to 32-bit ColdFire without PCB redesign - a distinctive NXP (formerly Freescale) design strategy.
Typical applications include industrial control, consumer appliance control, motor control, and building automation nodes where moderate code density (48KB Flash) and rich I/O are required. It also fits well in legacy S08AC designs needing replacement stock.
Design consideration: note that this part is now NRND (Not Recommended for New Designs) per the NXP product page, so new designs should target the Flexis 32-bit MCF51AC pin-compatible successors or evaluate remaining-lifetime implications.
This page synthesizes distributor pricing, verified family drop-in alternatives, comparison tables, and practical design notes not found on the manufacturer product page alone.
Bộ thay thế dễ dàng lắp đặt cho MC9S08AC48CFDE — 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 MC9S08AC48CFDE (cùng hình factor và footprint) — khác nhau ở Core Processor, Flash Memory, Lifecycle Status, Package, RoHS Status.
MC9S08AC60CFDE
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC9S08AC32CFDE
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC9S08AC48CFGE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S08AC60MFDE
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
MC9S08AC128CFDE
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC9S08AC48CFDE Tỷ lệ tối đa & tính chất điện
| Core Processor | S08 (HCS08) |
| Core Size | 8-Bit |
| Speed | 40 MHz CPU / 20 MHz internal bus |
| Flash Memory | 48KB (48K x 8) |
| RAM Size | 8KB |
| Supply Voltage Range | 2.7 V to 5.5 V |
| I/O Count | 38 |
| Hộp | 48-QFN-EP (7x7 mm) / 48-VFQFN Exposed Pad |
| Kiểu lắp đặt | Surface Mount |
| Architecture | CISC, HC08-derived HCS08 |
| Series | S08AC (Flexis series) |
| Kiểu bộ nhớ | Flash (ROM Type: Flash) |
| Trạng thái RoHS | RoHS Compliant |
| Trạng thái vòng đời | NRND (Not Recommended for New Designs) |
| Số chân | 48 |
Hướng dẫn cấu hình chân MC9S08AC48CFDE 48-qfn-ep (7x7 mm) / 48-vfqfn exposed pad
Cấu hình chân cho MC9S08AC48CFDE (48-qfn-ep (7x7 mm) / 48-vfqfn exposed pad gói). IC số này bao gồm chân GPIO, giao diện truyền thông (UART, SPI, I2C) và chân nguồn. Tham khảo tài liệu thông số kỹ thuật của nhà sản xuất để biết các chức năng chân thay thế và tùy chọn cấu hình. Cực kỳ quan trọng cho thiết kế hệ thống tích hợp và lập trình PCB.
Không có dữ liệu chân cụ thể sẵn có cho MC9S08AC48CFDE.
Tham khảo: tài liệu kỹ thuật cho cấu hình chân đầy đủ.
Ứng dụng tiêu biểu
MC9S08AC48CFDE phù hợp cho 6 Áp dụngs: Industrial Control Systems, Home Appliance Control, Motor Control and Drivers, Building Automation Nodes, Consumer Electronics and White Goods, Legacy S08AC Platform Maintenance.
Industrial Control Systems
The MC9S08AC48CFDE fits industrial control nodes that need deterministic 8-bit control with substantial I/O: its 40 MHz HCS08 core (20 MHz internal bus) provides adequate loop speed for PID control of temperature, pressure, and conveyor processes, while 38 I/O lines directly drive relays, optocouplers, and front-panel indicators without port expanders. The 2.7V to 5.5V supply range allows operation from noisy industrial 5V rails and direct interface with legacy 5V sensor levels, and 48KB Flash holds protocol stacks plus a bootloader for field firmware updates over RS-485 or CAN in factory automation cabinets.
Được đề xuất
Home Appliance Control
Appliance mainboards benefit from the MC9S08AC48CFDE's combination of 48KB Flash, 8KB RAM, and 38 I/O in a compact 7x7 mm QFN-EP: one device can run UI scanning, buzzer/LED feedback, relay-driven heater and motor sequencing, and ADC-based sensor feedback (temperature probes, buttons) from the S08AC peripheral set. The wide 2.7V to 5.5V supply simplifies mains-derived linear supply designs, and the Flexis migration path to MCF51AC lets manufacturers scale features across product tiers without PCB respin - a key cost lever documented by NXP for the AC family.
Được đề xuất
Motor Control and Drivers
In fan, pump, and small motor control, the MC9S08AC48CFDE's 40 MHz HCS08 core executes PWM generation, commutation, and current-loop servicing within the 20 MHz bus budget, while family timers generate complementary PWM outputs for MOSFET bridges. The 38 I/O include multiplexed timer and ADC channels used for back-EMF sensing and current shunt measurement. The exposed-pad QFN-48 improves thermal transfer to the PCB, helping dissipate heat in enclosed motor-control housings. In-circuit Flash reprogramming supports tuning of control constants during production and field service without socketed devices.
Được đề xuất
Building Automation Nodes
HVAC dampers, lighting controllers, and access panels use the MC9S08AC48CFDE because 48KB Flash accommodates communication stacks while 38 I/O drive keypads, LCD segments, and actuator outputs. The 2.7V to 5.5V range tolerates supply sag on long cable runs common in building wiring, and the QFN-48's 7x7 mm footprint suits dense wall-mounted control boards. Since S08AC is tool-compatible across 32KB-to-128KB Flash members and with 32-bit MCF51AC Flexis parts, a single JTAG/SWD debug infrastructure and common peripheral set serve an entire building-automation product family.
Được đề xuất
Consumer Electronics and White Goods
Cost-sensitive consumer products leverage the MC9S08AC48CFDE's single-chip integration: Flash, RAM, timers, serial interfaces, and ADC on one die reduce BOM count versus discrete MCU-plus-glue designs. The 40 MHz core headroom handles lidar-free proximity sensing, capacitive button scanning, and IR decoding concurrently, while 8KB RAM buffers communication frames. RoHS compliance supports global retail requirements. The QFN exposed pad simplifies two-layer board designs common in cost-optimized consumer goods, and family pin compatibility lets one PCB carry 32KB, 48KB, or 60KB Flash variants for feature tiering.
Được đề xuất
Legacy S08AC Platform Maintenance
For designs already built on the S08AC family, the MC9S08AC48CFDE serves as continuity stock while platforms are audited for lifecycle risk. Because the family is pin-, peripheral-, and tool-compatible from MC9S08AC32 through AC128 and up to MCF51AC256 ColdFire devices, a last-time-buy of AC48 parts can bridge firmware freeze periods, and future respins can drop in the AC60/AC128 or migrate to the 32-bit Flexis without PCB redesign. Heisener reported 6,592 units in stock as of 2026-10-18, though NRND status means buyers should secure buffer inventory.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC9S08AC48CFDE — 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 | MC9S08AC60CFDE | MC9S08AC32CFDE | MC9S08AC48CFGE | MC9S08AC60MFDE | MC9S08AC128CFDE |
|---|---|---|---|---|---|---|
| Package | 48-QFN-EP (7x7 mm) | 48-QFN-EP (7x7 mm) - same | 48-QFN-EP (7x7 mm) - same | 48-QFN-EP (7x7 mm) - same | 48-QFN-EP (7x7 mm) - same | 48-QFN-EP (7x7 mm) - same |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 48KB | 60KB | 32KB | 48KB | 60KB | 128KB |
| CPU Speed | 40 MHz (20 MHz bus) | 40 MHz (20 MHz bus) | 40 MHz (20 MHz bus) | 40 MHz (20 MHz bus) | 40 MHz (20 MHz bus) | 40 MHz (20 MHz bus) |
| Supply Voltage | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| I/O Count | 38 | 38 | 38 | 38 | 38 | 38 |
Bảo phân biệt quan trọng
- Flexis 8-bit to 32-bit migration path (vsMC9S08AC128CFDE)
- Balanced 48KB Flash / 8KB RAM midpoint (vsMC9S08AC32CFDE)
- Room for firmware growth without respin (vsMC9S08AC60CFDE)
Ghi chú thiết kế
The single most important design consideration is lifecycle: NXP lists MC9S08AC48CFDE as NRND on its product page. Before committing a PCB to this part, secure a last-time-buy window or design the footprint against the Flexis migration path - the S08AC family is pin-, peripheral-, and tool-compatible with 32-bit MCF51AC256/128 ColdFire devices, so a socket-compatible footprint protects against end-of-life disruption. Also verify the suffix code (CFDE) encodes your required temperature range and packing in the NXP ordering table.
Operate the MCU from a 2.7V to 5.5V rail per the datasheet. If the board mixes 3.3V and 5V domains, remember HCS08 I/O thresholds are supply-referenced - a 5V-powered AC48 driving 3.3V-only inputs may violate their maximum ratings. Add 0.1 uF ceramic decoupling on each supply pin pair plus bulk 10 uF near the regulator, and connect the QFN-48 exposed pad to a solid ground pour for both grounding and heat spreading.
The 48-QFN exposed pad (7x7 mm) requires a matching center land pattern with via array to the ground plane; use approximately 5x5 via fence (0.3 mm vias) under the pad and solder-mask-defined apertures on perimeter pads to prevent solder wicking shorts. Verify pin-1 orientation against the S08AC datasheet pinout diagram before generating the footprint - QFN pads are invisible after reflow, making misorientation costly to rework.
Thông tin tuân thủ
RoHS compliant per distributor listings (digchip: ROHS COMPLIANT, QFN-48). REACH, lead-free, halogen-free and conflict-minerals status not stated in the provided data - verify on the NXP product page environmental section.
