MC9S08AC48CFDE - 8-bit 40MHz 48KB Flash MCU | NXP
料号： MC9S08AC48CFDE ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $5.86 | $5.86 |
| 10 | $5.57 | $55.70 |
| 100 | $5.27 | $527.00 |
| 500 | $5.01 | $2,505.00 |
| 1,000 | $4.76 | $4,760.00 |
MC9S08AC48CFDE 概述
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.
直接替换替代料： MC9S08AC48CFDE ——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： MC9S08AC48CFDE （相同外形与封装尺寸） ——差异在于 Core Processor, Flash Memory, Lifecycle Status, Package, RoHS Status.
快速对比工具——选择替代料号进行并排对比：
MC9S08AC60CFDE
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$8.6 / 个
查看数据手册 →MC9S08AC32CFDE
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$3.02 / 个
查看数据手册 →MC9S08AC48CFGE
✅ 直接替换📋 参考替代料（不在目录中）
MC9S08AC60MFDE
✅ 直接替换📋 参考替代料（不在目录中）
MC9S08AC128CFDE
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
MC9S08AC48CFDE 最大额定值与电气特性
| 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 |
| 封装 | 48-QFN-EP (7x7 mm) / 48-VFQFN Exposed Pad |
| 安装类型 | Surface Mount |
| Architecture | CISC, HC08-derived HCS08 |
| Series | S08AC (Flexis series) |
| 存储器类型 | Flash (ROM Type: Flash) |
| RoHS 状态 | RoHS Compliant |
| 生命周期状态 | NRND (Not Recommended for New Designs) |
| 引脚数量 | 48 |
MC9S08AC48CFDE 48-qfn-ep (7x7 mm) / 48-vfqfn exposed pad 引脚配置指南
MC9S08AC48CFDE（48-qfn-ep (7x7 mm) / 48-vfqfn exposed pad 封装）的引脚配置。 该数字 IC 包含 GPIO、通信接口（UART、SPI、I2C）和电源引脚。请参阅制造商数据手册以了解复用引脚功能和配置选项。对嵌入式系统设计和 PCB 布局至关重要。
暂无详细引脚数据： MC9S08AC48CFDE.
请参阅 数据手册 以查看完整引脚配置。
典型应用
MC9S08AC48CFDE 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： MC9S08AC48CFDE ——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 | 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 |
关键差异点
- Flexis 8-bit to 32-bit migration path （对比 MC9S08AC128CFDE)
- Balanced 48KB Flash / 8KB RAM midpoint （对比 MC9S08AC32CFDE)
- Room for firmware growth without respin （对比 MC9S08AC60CFDE)
设计说明
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.
合规信息
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.
