MC908QY8CDWE - 8-bit HC08 MCU, 8KB Flash, 16-SOIC | NXP
MPN: MC908QY8CDWE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.1 | $310.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.1 | $2,100.00 |
MC908QY8CDWE Overview
What is an HC08 8-bit microcontroller? An HC08 MCU is a CISC-based 8-bit microcontroller built on the Von Neumann memory model, where program and data share a single address space. It sits inside the broader taxonomy: microcontroller -> embedded MCU -> 8-bit MCU -> CISC 8-bit MCU -> M68HC08 family. HC08 devices integrate CPU, FLASH, RAM, timers, I/O, and analog peripherals onto a single die to deliver low-cost, deterministic control for high-volume embedded products.
Key features of the MC908QY8CDWE include an internal oscillator that eliminates the need for an external crystal in many applications, a low-voltage detect (LVD) circuit for brown-out protection, 13 general-purpose I/O pins, and an on-chip 10-bit ADC. The integrated oscillator and ADC, combined with FLASH program memory, allow a complete factory-floor or appliance-style control loop on a single IC, with field re-programmability for firmware revisions.
Technically, the device uses the standard M68HC08 instruction set with BCD instructions, multiplier, and a fast multiplication/division capability that simplifies arithmetic loops compared with pure accumulator-only architectures. The internal bus runs from a user-trimmable bus-frequency generator; the 8 MHz figure cited in the datasheet is the maximum internal operating frequency. A security-lock feature protects against unauthorized memory reads, while the FLASH supports in-application re-programmability through the standard Freescale/NXP monitor ROM.
Typical applications for this part include low-cost industrial sensor signal conditioning, white-goods and small-appliance motor controllers, automotive body electronics sub-modules such as simple body controllers and interior lamp drivers, low-bandwidth battery-management peripherals, and simple user-interface controllers with keypad and LED scanning. The wide voltage range and integrated ADC make it attractive as a glue logic replacement in 5 V legacy systems.
When designing with the MC908QY8CDWE, observe that the part is delivered in the 16-SOIC W (wide-body) package, so PCB land patterns and pick-and-place tooling must match the 0.300 inch row spacing rather than the standard SOIC-16 narrow body. The internal oscillator accuracy is sufficient for asynchronous UART up to moderate baud rates but a crystal is recommended where tight timing accuracy is required.
Drop-in alternatives for MC908QY8CDWE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC908QY8CDWE (same form factor and footprint) — differing in Package, Program Memory Size, Supply Voltage, Architecture, Manufacturer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908QY4CDWE
✅ Drop-In📋 Reference alternative (not in catalog)
MC908QY8CDWER
✅ Drop-In📋 Reference alternative (not in catalog)
MC908QB8CDWE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC908QY8ACDWER
✅ Drop-In📋 Reference alternative (not in catalog)
MC908QY8CDWE Maximum Ratings & Electrical Characteristics
| Manufacturer | NXP Semiconductors (formerly Freescale) |
| Core | HC08 (M68HC08 family) |
| Architecture | CISC, Von Neumann |
| Data Bus Width | 8 bit |
| Program Memory Size | 8 KB FLASH (8K x 8) |
| RAM Size | 128 bytes |
| Maximum Clock Frequency | 8 MHz (internal bus) |
| ADC | 10-bit, successive approximation |
| Supply Voltage | 2.7 V to 5.5 V (supports 3.3 V and 5 V) |
| Operating Temperature Range | -40 C to +85 C (industrial) |
| I/O Pins | 13 (general-purpose) |
| Low Voltage Detect (LVD) | Yes |
| Internal Oscillator | Yes (integrated, trimming supported) |
| Package | 16-SOIC W (wide body, 0.300 inch) |
| Mounting Type | Surface Mount |
| MSL Level | 3 (per JEDEC J-STD-020) |
| RoHS Status | Compliant (Pb-free suffix indicated by 'E' in package code) |
| Series | HC08Q family (NITRON 908QY8) |
MC908QY8CDWE Pin Configuration
| Pin 1 | VSS — Ground reference |
| Pin 2 | PTA0/ATP — GPIO / ADC channel |
| Pin 3 | PTA1/ATPO — GPIO / ADC channel |
| Pin 4 | PTA2 — GPIO |
| Pin 5 | PTA3 — GPIO |
| Pin 6 | PTA4 — GPIO |
| Pin 7 | PTB0 — GPIO / external interrupt |
| Pin 8 | PTB1 — GPIO / external interrupt |
| Pin 9 | PTB2 — GPIO / external interrupt |
| Pin 10 | PTB3 — GPIO / external interrupt |
| Pin 11 | PTB4 — GPIO / timer channel |
| Pin 12 | PTB5 — GPIO / timer channel |
| Pin 13 | RST — Active-low reset input |
| Pin 14 | IRQ — External interrupt request |
| Pin 15 | VDD — Positive supply (2.7 V to 5.5 V) |
| Pin 16 | OSC1 — Oscillator / external clock input |
Typical Applications
MC908QY8CDWE is suitable for 7 applications: Low-cost industrial sensor signal conditioning, White-goods and small appliance motor control, Automotive body electronics sub-modules, Low-bandwidth battery management peripherals, User-interface and keypad/LED scan controller, 5 V legacy system glue-logic replacement, Smart-home sensor and thermostat peripherals.
Low-cost industrial sensor signal conditioning
Provides digital readout and control for analog sensors in factory automation nodes. The MC908QY8CDWE's 10-bit ADC, integrated internal oscillator and 13 GPIO pins allow direct connection to thermistors, photocells, and 4-20 mA current-sense amplifiers without external glue logic, while the 2.7-5.5 V supply range supports both 3.3 V and 5 V industrial backplanes. The wide-body 16-SOIC package is well-suited to hand-soldered prototype boards and through-hole reflow on heavy industrial PCBs.
Recommended
White-goods and small appliance motor control
Drives low-power brushed DC motors and triac-based AC loads in washing machines, dishwashers, and small kitchen appliances. The HC08 core's 8 MHz throughput executes PID-style control loops at the millisecond timescale, while the wide 2.7-5.5 V supply tolerance survives the noisy 5 V rails typical of universal-motor appliances. Internal FLASH allows firmware tuning for regional appliance variants and CSA/UL compliance iterations.
Recommended
Automotive body electronics sub-modules
Implements body controllers for seat adjusters, mirror modules, interior lamp drivers, and simple RKE receivers where 32-bit performance is overkill. The MC908QY8CDWE's industrial -40 C to +85 C temperature grade handles under-dash environments, and the on-chip low-voltage detect protects against crank-droop events on the 12 V battery bus. The wide-body 16-SOIC W package tolerates the higher-vibration automotive PCB environment better than smaller QFN alternatives.
Recommended
Low-bandwidth battery management peripherals
Performs cell-balancing, temperature monitoring, and pack-ID EEPROM emulation in secondary battery packs where a full BMS IC would be over-spec. The 10-bit ADC reads NTC thermistor dividers with 0.5 C resolution, while the low 2.7 V minimum supply supports direct connection to single-cell Li-ion stacks without an LDO. Wide-body SOIC packaging simplifies rework on replacement-pack service lines.
Recommended
User-interface and keypad/LED scan controller
Scans 4x4 keypads and multiplexes 7-segment or dot-matrix LED displays in appliance front panels and instrument clusters. The 13 GPIO pins drive direct LED segment currents up to the device's per-pin limit, while the internal oscillator provides deterministic scan timing without external crystals. FLASH-based firmware allows late-stage UI customization for OEM private-label SKUs.
Recommended
5 V legacy system glue-logic replacement
Replaces discrete 74HC logic, EPROMs, and timer chips with a single FLASH-based MCU in legacy 5 V industrial systems and test equipment. The 5 V-tolerant HC08 core drives TTL inputs directly, the internal oscillator eliminates one crystal per board, and the security-locked FLASH prevents unauthorized firmware readback. Wide-body 16-SOIC package drops onto existing 5 V through-hole PCB layouts.
Recommended
Smart-home sensor and thermostat peripherals
Acts as a leaf-node controller for battery-powered thermostats, leak detectors, and PIR occupancy sensors feeding back to a smart-home hub. The HC08's low active current and 2.7 V minimum supply extend coin-cell life, while the integrated ADC reads the analog sensor front-ends without an external AFE. The wide-body SOIC-16 W package is hand-solderable on small sensor PCBs, supporting low-volume smart-home SKUs.
Recommended
Recommended Products Summary
Engineering reference data for MC908QY8CDWE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908QY4CDWE | MC908QY8CDWER | MC908QB8CDWE | MC908QY8ACDWER |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 16-SOIC W (wide body) | 16-SOIC W (wide body) - same | 16-SOIC W (wide body) - same | 16-SOIC W (wide body) - same | 16-SOIC W (wide body) - same |
| Core | HC08, 8-bit | HC08, 8-bit | HC08, 8-bit | HC08, 8-bit | HC08, 8-bit |
| FLASH Size | 8 KB | 4 KB (-50%) | 8 KB (identical) | 8 KB (identical) | 8 KB (identical) |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 256 bytes (+100%) | 128 bytes |
| Maximum Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| ADC | 10-bit | 10-bit | 10-bit | 10-bit | 10-bit |
| Supply Voltage Range | 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 |
| Internal Oscillator | Yes | Yes | Yes | Yes | Yes |
Key Differentiators
- 8 KB FLASH in 16-SOIC W with full HC08 instruction set (vs MC908QY4CDWE)
- Adds 256 B RAM and PWM/timer peripheral (vs MC908QB8CDWE)
- Tube packaging optimized for low-volume and prototype runs (vs MC908QY8CDWER)
- A-suffix silicon revision for automotive quality flows (vs MC908QY8ACDWER)
Design Notes
Estimated: The MC908QY8CDWE uses the wide-body 16-SOIC W package with 0.300 inch row spacing - PCB land patterns must use the wider SOIC-16W footprint, not the narrow-body SOIC-16 used by typical logic gates. Pad pitch is 1.27 mm (0.050 inch); total land area per pad should be at least 2.0 mm x 0.6 mm to ensure reliable tombstoning-free reflow on 1.6 mm FR-4 boards.
Place a 100 nF decoupling capacitor as close as possible to VDD (pin 15), and a bulk 10 uF aluminum-polymer or tantalum cap on the same 5 V or 3.3 V rail within 1 inch of the device. According to the HC08Q datasheet, the internal regulator and ADC both draw transient currents during ADC conversions, so a high-frequency ceramic bypass is required in addition to the bulk cap for noise-free ADC readings.
Do not assume the internal oscillator gives 1% accuracy - the HC08Q internal oscillator typically runs at +/-5% to +/-10% before trimming, and is sensitive to VDD and temperature. For UART-based protocols, either use a crystal on OSC1/OSC2 (if exposed) or trim the internal oscillator at production test. Also note that pinout differs from the QB-family: verify PTA/PTB channel assignments against the actual datasheet package drawing, not cross-references from QB-family parts.
Keep ADC input traces short and away from switching nodes such as relays or motor driver outputs. The 10-bit ADC has a typical acquisition time of 16 us; adding a 10 kohm-100 kohm source impedance and an external 10 nF-100 nF capacitor at the ADC pin forms a low-pass anti-alias filter. According to the HC08Q datasheet, source impedances above 10 kohm degrade the ADC's effective number of bits.
Compliance Information
RoHS and REACH compliant per NXP product page. The 'E' suffix in the part number indicates Pb-free terminal finish per NXP/Freescale package code convention. AEC-Q100 qualification is not applicable to this part number; the MC908QY8ACDWER 'A' suffix variant follows an automotive-grade revision flow but is not formally AEC-Q100 qualified per the public datasheet.
