MC908KX2CPE - 8-Bit HC08 MCU, 8MHz, 2KB Flash | NXP
MPN： MC908KX2CPE ✗ 停產MC908KX2CPE 概覽
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a processor core, program memory, data memory, and peripherals on one die, executing one instruction on 8-bit data words at a time. Within the embedded systems hierarchy, an MCU sits below 16/32-bit processors in compute capability but above discrete logic, offering a complete, low-cost control solution. The HC08 (M68HC08) family from Motorola/Freescale, now maintained by NXP, is a CISC-architecture 8-bit line widely used in cost-sensitive control applications and still supported for legacy designs through authorized aftermarket channels such as Rochester Electronics.
Key features of the MC908KX2CPE include its 8 MHz internal bus operation, 2KB of in-system programmable Flash memory for field-updatable firmware, operation from either 3.3V or 5V supply rails, and an onboard SCI (Serial Communications Interface) for asynchronous UART communication. The 16-pin dual in-line package with through-hole terminals makes the device ideal for breadboarding, prototyping, and repair of legacy through-hole assemblies.
Technically, the HC08 core implements an enhanced M6805-derived CISC instruction set with indexed addressing modes, a low-power wait mode, and on-chip oscillator options. The KX2 subfamily represents the smallest memory configurations of the KX line, targeting simple control loops, timing supervision, and interface translation tasks where larger flash arrays are unnecessary.
Typical applications include small appliance control, industrial sensor signal conditioning nodes, LED and relay sequencing, battery charger supervision, and replacement MCUs in legacy industrial equipment repairs. The industrial temperature grade of the CPE suffix suits factory-floor environments.
Design consideration: as a mature product, new designs should evaluate current NXP MCUs, but for legacy maintenance the 5V-tolerant through-hole package simplifies drop-in servicing of existing boards.
This page synthesizes distributor stock data, pricing context, lifecycle information, and drop-in alternative analysis not consolidated in the manufacturer datasheet.
直接替換替代品，適用於 MC908KX2CPE — 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： MC908KX2CPE （相同外形與佔位） — 差異在於 Core Processor, Package, Mounting Type, Program Memory Size, Packaging.
MC908KX2CP
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
MC908KX2CDWE
✅ 直接替換 ⚠️ 規格未經驗證聯絡詢價
查看資料表 →MC908KX2CPE 最大額定值與電氣特性
| Core Processor | HC08 |
| Core Architecture | 8-Bit CISC |
| Core Size | 8-Bit |
| 最大時脈頻率 | 8 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 2KB (2K x 8) |
| 供應電壓 | 3.3 V / 5 V |
| Peripherals | SCI |
| 腳位數 | 16 |
| 封裝 | 16-PDIP |
| 安裝類型 | Through-Hole |
| Temperature Grade | Industrial |
| Product Family | HC08 |
| Manufacturer Prefix | MC908 (NXP / Freescale Semiconductor) |
| RoHS 狀態 | unknown |
MC908KX2CPE 16-pdip 腳位配置指南
MC908KX2CPE（16-pdip 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： MC908KX2CPE.
請參閱 資料表 以查看完整腳位配置。
典型應用
MC908KX2CPE 適用於 6 應用s: Small Appliance Control, Industrial Sensor Node, Legacy Equipment Repair and Servicing, Battery Charger Supervision, LED and Relay Sequencing, Educational and Prototyping Platforms.
Small Appliance Control
The MC908KX2CPE fits small appliance control boards because its 8 MHz HC08 core, 2KB Flash, and 16-pin PDIP through-hole package cover the exact needs of timer, key-scan, and relay-drive logic in coffee makers, fans, and washers. The dual 3.3V/5V supply range lets the same firmware image serve different power architectures, and the industrial temperature grade tolerates heat near heating elements. With the SCI interface unused or used for diagnostics, the part minimizes BOM cost while the in-system programmable Flash allows last-minute feature updates without changing sockets or masks.
推薦
Industrial Sensor Node
In industrial sensor nodes, the MC908KX2CPE pairs its 8-bit HC08 core and 2KB Flash with the SCI interface to condition analog sensor inputs and stream scaled readings over an RS-485/RS-232 link. The industrial temperature grade is essential near machinery, and the 16-PDIP through-hole package survives vibration better than fine-pitch SMD parts while remaining hand-replaceable during line service. Because the flash is in-system programmable, calibration constants and communication parameters can be updated on the production floor without desoldering, cutting maintenance cost in distributed monitoring installations.
推薦
Legacy Equipment Repair and Servicing
For repair of legacy HC08-based industrial equipment, the MC908KX2CPE is often the correct replacement because it preserves the original 16-pin PDIP footprint, HC08 instruction set, and 5V signaling of boards designed in the 1990s and 2000s. Through-hole sockets allow quick swaps without hot-air rework, and availability through Rochester Electronics plus independents (5000+ pieces reported across distributors) secures continuity. Firmware can be re-flashed in-system via the SCI-based monitor mode, so repaired boards return to service with identical behavior - something no cross-brand modern MCU can achieve without redesign.
推薦
Battery Charger Supervision
Battery charger supervisors benefit from the MC908KX2CPE's 3.3V/5V operation, 2KB Flash for charge-termination state machines, and timer peripherals for trickle/fast-charge sequencing. The 8 MHz HC08 core easily handles ADC polling, LED status indication, and SCI reporting of charge state to a host. Through-hole 16-PDIP mounting simplifies prototype bring-up and small-batch builds of custom chargers, while the industrial grade supports charging stations in unconditioned spaces such as garages and workshops. Flash programmability lets engineers tune termination thresholds after field trials without hardware changes.
推薦
LED and Relay Sequencing
Sequencing applications - indicator-light chasers, relay staging, and timing supervision - exploit the MC908KX2CPE's low overhead: the 8 MHz HC08 CISC core executes bit-manipulation instructions efficiently, and 2KB Flash holds generous sequence tables. The 16-pin PDIP provides enough general-purpose port pins for a handful of outputs plus clock and reset, and the 5V rail drives small relays through transistors directly. Industrial temperature rating and through-hole durability make the part reliable in control cabinets, while SCI allows remote sequence reconfiguration where deployed equipment is hard to access.
推薦
Educational and Prototyping Platforms
Universities and hobbyists use the MC908KX2CPE for teaching 8-bit embedded fundamentals because the 16-PDIP through-hole package inserts directly into breadboards, the HC08 CISC instruction set is compact and readable in assembly, and 2KB Flash is large enough for meaningful exercises yet small enough to teach memory discipline. Operation at 3.3V or 5V matches both modern and legacy lab benchtop supplies, and the SCI port connects to a PC terminal for UART experiments. Free HC08 assemblers and low-cost MON08 programming hardware keep the complete toolchain accessible to students.
推薦
推薦產品摘要
工程參考資料，適用於 MC908KX2CPE — 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 | MC908KX2CP | MC908KX2CDWE |
|---|---|---|---|
| Package | 16-PDIP | 16-PDIP - same | SOIC-16 (surface mount) |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) | NXP Semiconductors (Freescale) |
| Core | HC08 8-bit CISC | HC08 8-bit CISC | HC08 8-bit CISC |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz |
| Flash Memory | 2KB (2K x 8) | 2KB (2K x 8) | 2KB (2K x 8) |
| Supply Voltage | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V |
| Temperature Grade | Industrial | Commercial | Industrial (E suffix) |
| Serial Interface | SCI | SCI | SCI |
主要差異化特點
- Industrial temperature grade in through-hole PDIP (對比MC908KX2CP)
- SMT migration path on the same die (對比MC908KX2CDWE)
- Honest limitation: no cross-brand drop-in exists (對比PIC16F / AT89 8-bit MCUs)
設計說明
The MC908KX2CPE is a legacy HC08 part sourced mainly through Rochester Electronics and independent distributors. Before committing to a production run, confirm stock depth and lot date codes: spot-market parts may have mixed date codes or re-marked units. Purchase only from authorized aftermarket channels where traceability matters, and consider a lifetime-buy for long-term service programs supporting installed HC08-based equipment.
The device supports 3.3V and 5V operation, but verify the bus-frequency-versus-voltage operating envelope in the manufacturer datasheet before running 8 MHz at reduced supply. On 5V rails, add 0.1uF ceramic decoupling directly across VDD/VSS at the 16-PDIP socket, and keep reset lines properly pulled up per HC08 family requirements to guarantee clean power-on reset through the monitor-mode entry window.
For through-hole 16-PDIP designs, use a socketed layout for field serviceability in repair scenarios - the primary ongoing use case for this MCU. Keep the SCI (TX/RX) traces short and, for RS-232 links, place the level translator close to the MCU. If migrating to the SOIC-16 MC908KX2CDWE, the surface-mount variant shares pin functions, allowing a common schematic with alternate footprints for dual sourcing of through-hole and SMD builds.
合規資訊
Compliance data was not present in the retrieved distributor listings. As a legacy PDIP device, older date codes may not be RoHS compliant - verify with the supplier before ordering for RoHS-restricted markets.
