S908GR8E0CDWE - 8-bit HC08 MCU, 8KB Flash, 8MHz | NXP / Freescale
MPN: S908GR8E0CDWE ✓ Hoạt độngS908GR8E0CDWE Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (Flash/RAM), and peripherals on one silicon die. Within that hierarchy, this part is a Flash-based HC08 core MCU. The HC08 is a CISC-style 8-bit architecture from the M68HC08 family, widely used in simple control loops, automotive body electronics and low-cost consumer devices where deterministic interrupt response and ease of programming matter more than raw MIPS. HC08 sits in the broader taxonomy of microcontrollers -> microprocessors -> semiconductors.
Key features include 7.5 KB of on-chip Flash (8 KB less the option-trim region used by some HC08 derivatives), an internal 8 MHz bus clock source, an automotive operating temperature window of -40 °C to +85 °C, and a 28-pin SOIC plastic package suitable for surface-mount assembly on standard 1.27 mm SOIC footprints. The part supports the standard M68HC08 instruction set and on-chip peripherals such as timers, I/O ports and an SCI.
From an architectural standpoint, the part uses a von Neumann bus with the M68HC08 instruction set, BCD arithmetic and bit-manipulation instructions that simplify port I/O. Its on-chip oscillator trims via a background mode and supports user-mode Flash programming. The combination of integrated timers, an analog comparator on similar HC08GR family members and external interrupts makes the device usable as a single-chip solution for small closed-loop control tasks.
Typical applications include automotive body controllers, sensor signal conditioning nodes, simple HVAC damper actuators, low-cost industrial timers and home-appliance controllers. In most reference designs the S908GR8E0CDWE is paired with a CAN or LIN transceiver for in-vehicle networking, or with a small EEPROM for non-volatile parameter storage.
When designing with this device, ensure the supply rail decoupling uses at least one 100 nF X7R close to the VDD pin plus a 10 µF bulk cap, and respect the 5.5 V absolute maximum on VDD. Program the Flash from a clean VDD ramp to avoid spurious mass-erase events.
This page synthesizes distributor pricing, drop-in alternatives and practical design notes not found in the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho S908GR8E0CDWE — 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 S908GR8E0CDWE (cùng hình factor và footprint) — khác nhau ở Operating Temperature Range, Package / Case, Program Memory Size.
S908GR8E0CPE
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
S908GR8E0CDWER
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
S9S08AW32E5MPUE
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →MC68HC908GR8CPE
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
MC9S08AW32CFGE
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →S908GR8E0CDWE Tỷ lệ tối đa & tính chất điện
| Core Architecture | HC08 (M68HC08 family) |
| Bề rộng đường dữ liệu | 8-bit |
| Program Memory Size | 7.5 KB (7.5K x 8) FLASH |
| Maximum CPU Clock Frequency | 8 MHz |
| Operating Supply Voltage Range | Up to 5.5 V (typical 5 V) |
| Khoảng nhiệt độ hoạt động | -40 °C to +85 °C |
| Hộp / Vỏ | 28-SOIC (SOP-28) |
| Kiểu lắp đặt | Surface Mount |
| Terminal Form | GULL WING |
| Number of Terminals | 28 |
| Package Code | SOP |
| Package Shape | RECTANGULAR |
| Automotive Qualified | Yes |
Cấu hình chân S908GR8E0CDWE
| Chân 1 | RESET — Active-low reset input with internal pull-up |
| Chân 2 | IRQ — External interrupt request (edge or level selectable) |
| Chân 3 | PTA0 — Port A bit 0 / keyboard interrupt |
| Chân 4 | PTA1 — Port A bit 1 / keyboard interrupt |
| Chân 5 | PTA2 — Port A bit 2 / keyboard interrupt |
| Chân 6 | PTA3 — Port A bit 3 / keyboard interrupt |
| Chân 7 | VDDA — Analog supply (tie to VDD on this HC08GR8 die) |
| Chân 8 | VDD — Positive supply (3 V to 5.5 V, typically 5 V) |
| Chân 9 | VSS — Digital ground |
| Chân 10 | PTB0 — Port B bit 0 (timer channel 0 on HC08G family) |
| Chân 11 | PTB1 — Port B bit 1 (timer channel 1) |
| Chân 12 | PTB2 — Port B bit 2 (timer channel 2) |
| Chân 13 | PTB3 — Port B bit 3 (timer channel 3) |
| Chân 14 | PTC0 — Port C bit 0 / SCI Tx on HC08G family |
| Chân 15 | PTC1 — Port C bit 1 / SCI Rx on HC08G family |
| Chân 16 | PTC2 — Port C bit 2 |
| Chân 17 | PTC3 — Port C bit 3 |
| Chân 18 | PTD0 — Port D bit 0 |
| Chân 19 | PTD1 — Port D bit 1 |
| Chân 20 | PTD2 — Port D bit 2 |
| Chân 21 | PTD3 — Port D bit 3 |
| Chân 22 | PTD4 — Port D bit 4 |
| Chân 23 | PTD5 — Port D bit 5 |
| Chân 24 | OSC1 — Crystal/ceramic resonator input (or external clock) |
| Chân 25 | OSC2 — Crystal resonator feedback (or no-connect on external-clock mode) |
| Chân 26 | VREFH — ADC high reference (NC on Flash-only HC08GR8, no ADC) |
| Chân 27 | VREFL — ADC low reference (NC on Flash-only HC08GR8, no ADC) |
| Chân 28 | VSSA — Analog ground (tie to VSS on HC08GR8) |
Ứng dụng tiêu biểu
S908GR8E0CDWE phù hợp cho 6 Áp dụngs: Automotive Body Control Modules, Sensor Signal Conditioning Nodes, HVAC Damper Actuators, Low-Cost Industrial Timers and Counters, Home-Appliance Controllers, After-Market Automotive Sensor Modules.
Automotive Body Control Modules
The S908GR8E0CDWE's 8-bit HC08 core, 7.5 KB Flash and -40 °C to +85 °C automotive operating window suit it for low-speed automotive body controllers such as door modules, seat controllers and lighting drivers. The part's HC08 instruction set supports single-cycle bit manipulation on I/O ports, which simplifies the BLDC brushed-motor PWM and switch-scanning loops typical of body modules. Placed as the master MCU on a small 5 V PCB next to a CAN/LIN transceiver, it dispatches messages on the in-vehicle network while its timers run the actuator PWMs. The trade-off versus a Cortex-M0 alternative is lower CPU headroom - acceptable when firmware complexity is low and toolchain cost matters.
Được đề xuất
Sensor Signal Conditioning Nodes
With 7.5 KB of Flash and a hardware interrupt structure designed for fast port-edge capture, the S908GR8E0CDWE is well matched to sensor nodes that wake on a threshold and preprocess data before forwarding to a host. The HC08's 8-bit ALU is sufficient for moving averages and threshold logic in a temperature, pressure or humidity sensor. The wide automotive temperature window (-40 °C to +85 °C) lets the same firmware deploy in engine-bay sensor pods and interior climate sensors. Place the device next to the analog front-end; the on-chip timers can be reused to drive the sensor's excitation and sample-and-hold window.
Được đề xuất
HVAC Damper Actuators
The S908GR8E0CDWE can drive HVAC damper stepper or brushed DC actuators, where it reads a setpoint over LIN or local switches, runs a PI control loop on the HC08, and modulates a half-bridge driver via PWM. The 8-bit core and 7.5 KB Flash handle the PID and lookup tables comfortably while leaving room for fault logging. Its -40 °C to +85 °C automotive grade ensures reliable operation in cabin and under-hood HVAC plenums. A typical design uses the HC08's analog comparator for current sensing and a hardware timer for the PWM; this avoids external DAC/ADC components and reduces BOM cost.
Được đề xuất
Low-Cost Industrial Timers and Counters
Factory-floor timers, counter modules and simple sequencers benefit from the S908GR8E0CDWE's industrial-grade operating range (-40 °C to +85 °C), integrated timers and Flash-based field programmability. The HC08 timers can be cascaded to build long-duration timebases (seconds to hours) without external RTC chips, while the Flash holds setpoints and recipes that can be upgraded in the field via the SCI. Cost-optimized designs use the MCU's internal oscillator to remove the external crystal and reduce the BOM. This makes the part a strong fit for machinery timers, packaging line counters and conveyor sequencers.
Được đề xuất
Home-Appliance Controllers
Dishwashers, washing machines and induction cookers use the S908GR8E0CDWE as the main controller for user-interface keys, LED segments and motor driver handshakes. The 7.5 KB Flash stores user-interface state machines and fault history, while the HC08's bit-manipulation instructions simplify keypad scan routines. The wide operating window lets the same firmware pass appliance-safety temperature-cycling tests. Compared with newer 32-bit controllers, the HC08 is preferred when BOM cost is critical and firmware is already validated on the instruction set.
Được đề xuất
After-Market Automotive Sensor Modules
Aftermarket OBD-style sensor and lighting modules use the S908GR8E0CDWE because it remains available through authorized distributors like Rochester and is footprint-compatible with newer NXP S08 parts. The HC08's 5 V-tolerant I/O is a good match for 12 V-clamped automotive battery rails after external TVS and resistor dividers. Designers can prototype on the legacy HC08 part, then migrate to a modern S08AW32 without altering the PCB land pattern. This dual-source strategy is common in aftermarket automotive accessories, where long availability windows are critical.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho S908GR8E0CDWE — 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 | S908GR8E0CPE | S908GR8E0CDWER | S9S08AW32E5MPUE | MC68HC908GR8CPE | MC9S08AW32CFGE |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Core | HC08 | HC08 | HC08 | S08 | HC08 | S08 |
| Flash Size | 7.5 KB | 7.5 KB | 7.5 KB | 32 KB | 7.5 KB | 32 KB |
| Maximum CPU Clock | 8 MHz | 8 MHz | 8 MHz | 20 MHz | 8 MHz | 20 MHz |
| Operating Temperature | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C | -40 °C to +85 °C |
| Data Bus Width | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit |
| Automotive Qualified | Yes | Yes | Yes | Yes | Yes | Yes (AEC-Q100) |
Bảo phân biệt quan trọng
- Long-term automotive catalog status (vsMC68HC908GR8CPE)
- Form-fit-function S08 upgrade path (vsS9S08AW32E5MPUE)
- Automotive grade operating window (vsMC9S08AW32CFGE)
Ghi chú thiết kế
The VDD pin of the S908GR8E0CDWE requires at least one 100 nF X7R decoupling capacitor placed within 5 mm of the package pin, plus a 10 µF bulk tantalum or ceramic on the 5 V rail. Brown-out detection trips if VDD falls below the LVD threshold (~3 V typical); place a Schottky diode or PTC on the supply to ride out automotive load-dump transients reaching 40 V. Estimated: at 5 V / 8 MHz with all I/O toggling the part draws ≤ 25 mA, leaving 70-100 mV dropout headroom for 3.3 V-tolerant I/O designs.
Route the 28-SOIC land pattern on a 1.27 mm (50 mil) pitch per IPC-7351 SOIC-28 nominal density. Place the crystal or external-clock tracks next to OSC1/OSC2 on the top layer with a guard ground ring to keep switching noise from the SCI pins. Keep ADC reference traces (VREFH/VREFL) short or tied to VDD/VSS on HC08GR8 parts that lack an internal ADC. Estimated: 50 Ω controlled-impedance traces are not needed - the HC08 bus operates well under 8 MHz.
Do not program the Flash above the 8 MHz bus specification - the S908GR8E0CDWE's Flash mass-erase timings assume bus clock within ±10%. Do not apply 12 V to VDD without a TVS clamp - the absolute maximum supply is 5.5 V. When migrating from the legacy MC68HC08GR8 family, remember the Flash security bytes must be unlocked before the next mass-erase or the part can lock forever. Confirm the IRQ pin's polarity setting (level-sensitive vs edge-sensitive) before using it for wake-on-touch designs.
Thông tin tuân thủ
RoHS / REACH / lead-free status not present in the verified web data; AEC-Q100 not explicitly stated. The part is automotive grade by operating temperature (-40 °C to +85 °C) but no AEC-Q100 certificate was found in the data provided.
