MC908KX2CDWE - HC08 8-Bit MCU 2KB Flash 16-SOIC | NXP
MPN： MC908KX2CDWE ✗ 停產MC908KX2CDWE 概覽
An 8-bit microcontroller is a complete computer system on a single chip that executes control, sensing, and communication tasks inside embedded products. Within the power management hierarchy of embedded systems, the MCU sits above discrete logic and below application processors, making HC08-class devices the workhorses of cost-sensitive control applications. The M68HC08 family is based on NXP's customer-specified integrated circuit (CSIC) design strategy, and all family members share the enhanced CPU08 central processing unit.
Key features of the MC908KX2CDWE include the low-cost, high-performance HC08 CISC core running at up to 8 MHz, 2KB (2K x 8) of in-system-programmable FLASH memory that eliminates external EPROM or OTP devices, on-chip low-voltage detection (LVD) for brown-out protection, and power-on reset (POR) that removes external supervisory circuitry. The 13 I/O lines and PWM capability suit direct drive of relays, LEDs, and small loads.
Technically, the KX2 subfamily combines the CPU08 with a compact peripheral set and FLASH endurance suitable for field reprogramming. The SCI module supports standard asynchronous serial links for telemetry and configuration. Wide-supply operation from 3.3V to 5V allows a single design to span both logic families.
Typical applications include small appliance control, battery chargers, automotive body accessories, and industrial sensor nodes where 2KB of code space is sufficient.
Design consideration: verify FLASH code density early - at 2KB there is little headroom for protocol stacks, so budget code size carefully and consider the larger KX8 variant for growth paths.
This page synthesizes distributor pricing, lifecycle status, and practical design notes not found in the manufacturer datasheet, providing drop-in sourcing context for this EOL part.
直接替換替代品，適用於 MC908KX2CDWE — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： MC908KX2CDWE （相同外形與佔位） — 差異在於 Program Memory Size, Package, RAM Size, Peripherals, Part Status.
MC68HC908LB8CDWE
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC68HC908LB8MDWE
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC908QL3CDWE
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC908KX2CDWE 最大額定值與電氣特性
| Core Processor | HC08 (CPU08) |
| Core Size | 8-Bit |
| Architecture | CISC |
| Maximum Clock Speed | 8 MHz |
| Program Memory Size | 2 KB (2K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 192 x 8 |
| EEPROM Size | None |
| Number of I/O | 13 |
| Connectivity | SCI |
| Peripherals | LVD, POR, PWM |
| 供應電壓 | 3.3 V / 5 V |
| 封裝 | 16-SOIC (wide body, DWE) |
| 安裝類型 | Surface Mount |
| Packaging | Tube |
| Part Status | Obsolete / Not For New Designs |
| Series | HC08 (M68HC08 Family, KX2) |
MC908KX2CDWE 16-soic (wide body, dwe) 腳位配置指南
MC908KX2CDWE（16-soic (wide body, dwe) 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： MC908KX2CDWE.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC908KX2CDWE 適用於 6 應用s: Small Appliance Control, Battery Charger Control, Industrial Sensor Nodes, Automotive Body Accessories, LED Lighting Control, Legacy System Maintenance and Last-Time-Buy Bridging.
Small Appliance Control
The MC908KX2CDWE fits small appliance control boards - coffee makers, blenders, and fans - where the control task is a state machine plus a few buttons and indicators. Its 8 MHz HC08 core executes such logic with large timing margin, while 2KB FLASH holds the application, button debouncing, and SCI diagnostics. The 13 GPIO lines directly drive LEDs and triac-driver inputs through the integrated PWM module for power-level control. Integrated LVD and POR eliminate external reset supervisory chips, cutting BOM cost on high-volume consumer boards, and the 5V operation matches transformer-based appliance power supplies without an additional regulator stage.
推薦
Battery Charger Control
Battery charger boards benefit from the MC908KX2CDWE's combination of PWM output, ADC-free simple sensing via comparators or external parts, and low-voltage detection. The PWM module generates charge-rate control for buck or linear charger stages, while the 13 I/O lines handle charge-status LEDs, thermistor inputs, and key detection. The LVD circuit safely suspends charging during brown-out events, protecting cells from uncontrolled charge termination. With 2KB FLASH, full CC/CV charging profiles, termination logic, and fault handling fit comfortably, and the SCI port enables charger-to-host reporting in smart-charging docks and multi-bay chargers.
推薦
Industrial Sensor Nodes
In industrial sensing nodes, the MC908KX2CDWE reads switches, thresholds, and simple sensors and reports over the SCI asynchronous serial link to a PLC or gateway. The 3.3V/5V wide supply tolerance tolerates noisy industrial rails, while LVD and POR guarantee deterministic startup after power dips common on factory floors. The 16-pin wide-SOIC package offers generous 1.27mm pin spacing for hand-solderable, reworkable designs that maintenance teams favor. With 2KB FLASH, protocol framing, sensor filtering, and CRC checking all fit, making the part viable for legacy node maintenance where the design base already uses HC08 tooling.
推薦
Automotive Body Accessories
Legacy automotive accessory modules - seat controllers, mirror adjusters, and lighting switches - were commonly built on HC08 KX2 silicon because of its low cost, robust reset protection, and simple single-sided board layouts around the wide SOIC body. The MC908KX2CDWE's 13 GPIO and PWM outputs drive relays and lamp loads, while LVD keeps operation stable during cranking voltage sags. For service and remanufacturing of these legacy modules, the part remains relevant even though new automotive designs must use AEC-Q100 qualified devices. Verify exact temperature grade requirements against the commercial-grade CDWE variant before deployment in cabin-only positions.
推薦
LED Lighting Control
The MC908KX2CDWE suits LED lighting drivers and dimmers where the PWM module provides brightness control and the GPIO handles mode buttons and occupancy inputs. The 8 MHz core comfortably implements fade curves, dimming tables, and switch protocols such as simple serial dimming over SCI. Wide 3.3V/5V operation permits powering directly from auxiliary supplies, and the LVD ensures the MCU does not corrupt PWM duty registers during brown-out, preventing flash-over-brightness faults. The 2KB FLASH holds complete lighting state machines, and the wide SOIC package dissipates heat adequately for room-temperature luminaires and under-cabinet lighting boards.
推薦
Legacy System Maintenance and Last-Time-Buy Bridging
A primary continuing use of the MC908KX2CDWE is sustaining legacy products whose firmware and toolchains are already validated on the HC08 KX2. Because the part is EOL, procurement teams should perform a last-time-buy sized against end-of-life forecasts, qualify authorized aftermarket sources such as Rochester Electronics, and evaluate footprint-compatible HC08 parts like the MC68HC908LB8CDWE as bridge options. For long-lived industrial equipment, planning a firmware-port migration path to the active MC9S08 family avoids obsolescence exposure while retaining architecture familiarity, since the MC9S08 core inherits HC08 code structure and development methodology.
推薦
推薦產品摘要
工程參考資料，適用於 MC908KX2CDWE — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | MC68HC908LB8CDWE | MC68HC908LB8MDWE | MC908QL3CDWE | MC908KX2CPE |
|---|---|---|---|---|---|
| Package | 16-SOIC (wide body, DWE) | 16-SOIC (wide body, DWE) - same | 16-SOIC (wide body, DWE) - same | 16-SOIC (wide body, DWE) - same | 16-PDIP - different footprint |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Speed | HC08, 8 MHz | HC08, 8 MHz | HC08, 8 MHz | HC08, 8 MHz | HC08, 8 MHz |
| Program Memory (FLASH) | 2 KB | 8 KB | 8 KB | 1.5 KB | 2 KB |
| RAM | 192 bytes | 256 bytes | 256 bytes | 128 bytes | 192 bytes |
| I/O Count | 13 | 14 | 14 | 13 | 13 |
| Supply Voltage | 3.3 V / 5 V | 3 V / 5 V | 3 V / 5 V | 3 V / 5 V | 3.3 V / 5 V |
| Lifecycle Status | EOL / Not For New Designs | EOL | EOL | EOL | EOL / Not For New Designs |
主要差異化特點
- True 2KB FLASH code size within HC08 KX2 family (對比MC908QL3CDWE)
- Same-die PDIP twin exists for service boards (對比MC908KX2CPE)
- Fewer peripherals keeps cost low but limits growth (對比MC68HC908LB8CDWE)
設計說明
The MC908KX2CDWE is end-of-life per the official NXP product page. Any new PCB release should not specify this part. For sustaining existing production, size a last-time-buy from total remaining field-life forecasts, qualify authorized aftermarket sources (Rochester Electronics lists the part on DigiKey), and budget broker-stock premium pricing - EOL HC08 parts frequently trade above original list. Document the approved alternate lot sources in your AVL to prevent counterfeit intake.
Decouple VDD with a 0.1 uF ceramic capacitor placed within a few millimeters of the pin, plus a 4.7-10 uF bulk capacitor on the board. The integrated LVD will reset the MCU during brown-outs, but do not rely on it to protect external circuitry. The part accepts 3.3V or 5V supplies - if your board mixes 5V peripherals with a 3.3V MCU rail, verify SCI level compatibility or add level shifting on the serial link.
The 16-pin wide-body SOIC has 1.27 mm lead pitch, which is comfortably hand-solderable and reworkable - one reason legacy industrial boards favored this package. Give the RESET and IRQ lines pull-up resistors (typically 10 k-ohm) per HC08 family practice to prevent spurious resets in noisy environments. Keep the oscillator traces short and guard them from PWM switch-node routing to avoid clock jitter on the internal PLL-less CPU08 timing.
合規資訊
Compliance data not explicitly stated in retrieved distributor/manufacturer data. As an EOL part originally released before RoHS transition, some stock may be tin-lead finish - request material declarations per lot from the seller.
