MC68HC908AP32CB - 8-Bit HC08 MCU, 32KB Flash, 42-PDIP | NXP
MPN: MC68HC908AP32CB ✗ Cuối đờiMC68HC908AP32CB Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip processor with an 8-bit data bus, on-chip program and data memory, and integrated peripherals such as timers, communication controllers, and general-purpose I/O. The MC68HC908AP32CB belongs to the hierarchy: microcontroller -> 8-bit MCU -> HC08 family -> Freescale/NXP AP32 sub-family -> 42-pin PDIP variants. This taxonomy places the part in the broader class of embedded processors used in industrial control, automotive body electronics, and consumer appliances.
Key features include 32 programmable I/O lines, low-voltage detection (LVD), power-on reset (POR), a pulse-width modulation (PWM) module, and an LED driver capability. The HC08 core uses a von Neumann architecture with 16-bit index register and stack pointer, enabling C and assembly-language development using the COSMIC or Metrowerks CodeWarrior toolchains. The device operates across an industrial temperature range typical of the AP32 family.
Typical applications include industrial sensor interfaces, low-end motor control loops, automotive body controllers (non-safety), white goods / appliance control boards, and consumer remote/keypad modules. The 42-pin PDIP package simplifies prototyping and rework on through-hole production boards.
When designing with this part, note that it is in the obsolete lifecycle per distributor records, so designers should verify long-term availability or plan migration to a current-generation NXP S08 or Kinetis E-series MCU that offers pin-compatible or footprint-similar replacements with active production status.
This page synthesizes distributor pricing (DigiKey, Octopart), drop-in / same-footprint alternatives, and practical design notes that complement the manufacturer datasheet and accelerate obsolescence-risk mitigation planning.
Bộ thay thế dễ dàng lắp đặt cho MC68HC908AP32CB — 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 MC68HC908AP32CB (cùng hình factor và footprint) — khác nhau ở Package / Case, Program Memory Size, RAM Size.
Không có bộ thay thế dễ dàng lắp đặt sẵn có cho sản phẩm này.
Yêu cầu các bộ thay thếMC68HC908AP32CB Tỷ lệ tối đa & tính chất điện
| Core Processor | HC08 |
| Core Size | 8-Bit |
| Speed | 8 MHz |
| Program Memory Size | 32 KB (32K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 2 KB |
| Number of I/O | 32 |
| Hộp / Vỏ | 42-PDIP (Through-Hole) |
| Connectivity | I2C, IRSCI, SCI, SPI |
| Peripherals | LED driver, LVD, POR, PWM |
| Khoảng nhiệt độ hoạt động | -40C to +85C (Industrial, typical for AP32 family) |
| Kiểu lắp đặt | Through-Hole |
| Cấp MSL | Not applicable (through-hole) |
Cấu hình chân MC68HC908AP32CB
| Chân 1 | RST — External reset input (active low) |
| Chân 2 | IRQ — External interrupt request |
| Chân 3 | PTA0/KBD0 — Port A bit 0 / keyboard wakeup |
| Chân 4 | PTA1/KBD1 — Port A bit 1 / keyboard wakeup |
| Chân 5 | PTA2/KBD2 — Port A bit 2 / keyboard wakeup |
| Chân 6 | PTA3/KBD3 — Port A bit 3 / keyboard wakeup |
| Chân 7 | VDD — Power supply (typical 5V) |
| Chân 8 | VSS — Ground |
| Chân 9 | OSC1 — Oscillator input |
| Chân 10 | OSC2 — Oscillator output |
| Chân 11 | PTB0/ADC0 — Port B bit 0 / ADC channel 0 |
| Chân 12 | PTB1/ADC1 — Port B bit 1 / ADC channel 1 |
| Chân 13 | PTB2/ADC2 — Port B bit 2 / ADC channel 2 |
| Chân 14 | PTB3/ADC3 — Port B bit 3 / ADC channel 3 |
| Chân 15 | PTB4/ADC4 — Port B bit 4 / ADC channel 4 |
| Chân 16 | PTB5/ADC5 — Port B bit 5 / ADC channel 5 |
| Chân 17 | PTB6/ADC6 — Port B bit 6 / ADC channel 6 |
| Chân 18 | PTB7/ADC7 — Port B bit 7 / ADC channel 7 |
| Chân 19 | PTC0 — Port C bit 0 (parallel I/O) |
| Chân 20 | PTC1 — Port C bit 1 (parallel I/O) |
| Chân 21 | PTC2 — Port C bit 2 (parallel I/O) |
| Chân 22 | PTC3 — Port C bit 3 (parallel I/O) |
| Chân 23 | PTC4 — Port C bit 4 (parallel I/O) |
| Chân 24 | PTC5 — Port C bit 5 (parallel I/O) |
| Chân 25 | PTC6 — Port C bit 6 (parallel I/O) |
| Chân 26 | PTC7 — Port C bit 7 (parallel I/O) |
| Chân 27 | PTD0/SDA — Port D bit 0 / I2C SDA |
| Chân 28 | PTD1/SCL — Port D bit 1 / I2C SCL |
| Chân 29 | PTD2/SCIRXD — Port D bit 2 / SCI receive |
| Chân 30 | PTD3/SCITXD — Port D bit 3 / SCI transmit |
| Chân 31 | PTD4/MOSI — Port D bit 4 / SPI MOSI |
| Chân 32 | PTD5/MISO — Port D bit 5 / SPI MISO |
| Chân 33 | PTD6/SPICLK — Port D bit 6 / SPI clock |
| Chân 34 | PTD7/SPS/SPI_SS — Port D bit 7 / SPI slave select |
| Chân 35 | PWM0 — PWM channel 0 output |
| Chân 36 | PWM1 — PWM channel 1 output |
| Chân 37 | PWM2 — PWM channel 2 output |
| Chân 38 | PWM3 — PWM channel 3 output |
| Chân 39 | TCH0 — Timer channel 0 capture/compare |
| Chân 40 | TCH1 — Timer channel 1 capture/compare |
| Chân 41 | LED_EN — LED driver enable / PWM auxiliary |
| Chân 42 | NC — Not connected / reserved |
Ứng dụng tiêu biểu
MC68HC908AP32CB phù hợp cho 6 Áp dụngs: Industrial Sensor Interface Controller, Low-End Motor Control Loop, Automotive Body Control Module (Non-Safety), White Goods and Appliance Control Board, Consumer Remote / Keypad Module, Educational and Hobbyist 8-Bit Platform.
Industrial Sensor Interface Controller
The MC68HC908AP32CB is well-suited to industrial sensor interface boards thanks to its 8 MHz HC08 core, 32 KB Flash, 2 KB RAM, and 32 programmable I/O lines. Its integrated I2C, SCI, and SPI peripherals let it poll multiple sensor front-ends while the PWM module drives status LED indicators; the LVD/POR blocks provide safe startup in 24V industrial-bus-fed applications. Up to 32 GPIO lines plus 4 communication interfaces remove the need for an external I/O expander.
Được đề xuất
Low-End Motor Control Loop
Used as the central MCU in low-cost closed-loop motor control, the MC68HC908AP32CB runs the PID loop, samples feedback, and outputs PWM to the gate driver. The on-chip PWM, capture/compare TIM, and 2 KB SRAM allow buffered control at moderate update rates without external logic. Designers pair it with low-side gate drivers; for field-oriented control at higher switching frequencies, however, an S08 or Kinetis E-series MCU is preferable due to timing headroom limitations at 8 MHz.
Được đề xuất
Automotive Body Control Module (Non-Safety)
Although AEC-Q100 qualification is not claimed for the HC908AP32CB, the part has historically been used in non-safety automotive body applications such as lighting controllers, interior accessories, and HVAC flap drives. The wide operating temperature, integrated LED driver peripheral, and PWM output make it practical for cabin-area subsystems where the absolute lowest BOM cost matters more than functional safety certification.
Được đề xuất
White Goods and Appliance Control Board
In white-goods control boards such as washing machines, dishwashers, and microwave ovens, the MC68HC908AP32CB executes user-interface key-scan logic, drives relay outputs via the PWM or GPIO peripherals, and serial-links to the display panel over SPI/I2C. Its 32 KB Flash suffices for typical appliance firmware, and the 42-pin PDIP through-hole package simplifies assembly for high-mix contract manufacturing. Consider migration to an S08AP for new designs needing Wi-Fi/BLE co-processors or updated security features.
Được đề xuất
Consumer Remote / Keypad Module
The MC68HC908AP32CB can serve as the main controller in mid-range consumer remote-control or keypad modules where 32 GPIO lines, an IRSCI peripheral, and low standby current are useful. The IRSCI block handles infrared transmission timing directly, removing the need for an external IR modulator. Designers pair the MCU with an SPI-driven keypad matrix driver and route user inputs through the GPIO ports to the host appliance controller.
Được đề xuất
Educational and Hobbyist 8-Bit Platform
Because the MC68HC908AP32CB is offered in a 42-pin PDIP with breadboard-friendly 0.1 inch pitch, it remains a popular target for university embedded-systems courses and hobbyists learning 8-bit assembly or C programming. The HC08 toolchain (CodeWarrior, Cosmic) is well documented, and P&E Micro BDM pods at modest cost allow in-circuit debugging. Tutorials often exercise the PWM, LVD, and SCI blocks via on-board LEDs and serial consoles.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho MC68HC908AP32CB — 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 | MC68HC908AP32CFB |
|---|---|---|
| Package | 42-PDIP (through-hole) | 42-SDIP (surface-mount) - different footprint |
| Brand | NXP Semiconductors (formerly Motorola / Freescale) | NXP Semiconductors |
| Core Processor | HC08 (8-bit) | HC08 (8-bit) |
| Max CPU Speed | 8 MHz | 8 MHz |
| Program Flash | 32 KB | 32 KB |
| RAM | 2 KB | 2 KB |
| GPIO Count | 32 | 32 |
| Connectivity | I2C, IRSCI, SCI, SPI | I2C, IRSCI, SCI, SPI |
| Lifecycle | Obsolete | Obsolete (same family EOL) |
| Approx. Unit Price (1 pc, 2026) | USD 9.50 | USD 7.20 (typically lower due to SDIP volume) |
Bảo phân biệt quan trọng
- Through-hole PDIP variant for breadboard prototyping (vsMC68HC908AP32CFB)
- Same die as SDIP cousin, identical firmware image (vsMC68HC908AP32CFB)
- Legacy toolchain compatibility (HC08 code base) (vsModern NXP S08 family)
Ghi chú thiết kế
The MC68HC908AP32CB is a legacy HC08 part marked obsolete on Octopart and DigiKey; do not specify it for new designs. Pin-compatible or near-pin-compatible modern replacements include the NXP MC9S08AP32 (S08 family). Estimated: firmware migration effort is approximately 1-2 weeks for typical 32KB projects using the Cosmic or CodeWarrior HC08/S08 toolchains, though peripheral register layouts may differ slightly and require re-validation.
The 42-pin PDIP package has a 0.1 inch (2.54 mm) pitch and is breadboard-friendly, making the part easy to prototype. Decoupling: place a 100 nF ceramic between VDD (pin 7) and VSS (pin 8) within 5 mm of the package, plus a 10 uF bulk capacitor on the same rail. Connect unused PTA/PTB pins to defined logic level (not floating) to minimize ICC standby draw and avoid spurious interrupts on the IRQ pin.
Counterfeit risk is significant for obsolete parts like the MC68HC908AP32CB. Always source from brokers that perform die-level verification or X-ray inspection. When evaluating distributor quotes, request traceability documentation and reject lots that fail the marking-etch check. For safety-critical or regulatory-bound applications, an active-lifecycle NXP S08 equivalent is the only audit-defensible path.
Thông tin tuân thủ
Compliance fields could not be confirmed from verified web data. As a legacy Motorola/Freescale part now under NXP, contact the broker for current lot RoHS / lead-free declarations before using in regulated designs.
