MC908QY2ACDWER - 8-bit HC08 MCU, 1.5KB Flash, 8MHz | NXP
MPN: MC908QY2ACDWER ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.21 | $2,210.00 |
MC908QY2ACDWER Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a processor core, program and data memory, and peripherals such as timers, ADCs, and I/O ports on one die. Within the power management and embedded control hierarchy, the M68HC08 family sits in the low-cost, high-performance class of 8-bit CISC MCUs, descending from the classic 68HC05 architecture and targeting cost-sensitive embedded control nodes.
Key features include the enhanced CPU08 CISC core with Von Neumann architecture, 1.5KB on-chip FLASH memory with in-circuit reprogrammability, an on-chip analog-to-digital converter (ADC), and PWM timer channels. The part operates from a 3.3V or 5V supply and carries an industrial temperature grade, making it robust for electrically noisy environments.
Architecturally, the MC908QY2 belongs to the HC08Q Family of the M68HC08 line, which uses the CPU08 core across a range of memory sizes and package options. This CMOS device keeps standby and run currents low while the FLASH memory eliminates the OTP/windowed-erase constraints of older 8-bit MCUs, simplifying firmware updates in the field.
Typical applications include small appliance control, low-cost motor and LED control using the PWM channels, battery chargers, sensor signal conditioning with the ADC, and simple industrial timing and sequencing tasks where 1.5KB of code space and 14 I/O lines are sufficient.
Design consideration: the QY2 variant has the smallest FLASH option in the QY family; verify code-size headroom early, since migrating to a larger-memory family member (QY4/QY8) in the same SOIC-16 footprint is the usual upgrade path.
This page synthesizes distributor pricing, drop-in alternatives, comparison tables, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for MC908QY2ACDWER — 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 MC908QY2ACDWER (same form factor and footprint) — differing in Package, Program Memory Size, Mounting Type, ADC, Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC908QY2ACDWE
✅ Drop-In📋 Reference alternative (not in catalog)
MCHC908QY2CDWER
✅ Drop-In📋 Reference alternative (not in catalog)
MCHC908QY2MDWER
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC908QY8CDWE
✅ Drop-In✓ In Stock
$2.1 / Unit
View Datasheet →MC908QY8VDWE
✅ Drop-In✓ In Stock
Contact for price
View Datasheet →MC68HC908LB8CDWE
✅ Drop-In✓ In Stock
$3.15 / Unit
View Datasheet →MC908QY2ACDWER Maximum Ratings & Electrical Characteristics
| Core Processor | HC08 (CPU08) 8-bit CISC |
| Core Size | 8-bit |
| Maximum Clock Frequency | 8 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 1.5KB (1.5K x 8) |
| Supply Voltage | 3.3 V / 5 V |
| Number of I/O | 14 |
| Peripherals | ADC, PWM |
| Package | 16-SOIC (0.295in, 7.50mm width) |
| Mounting Type | Surface Mount |
| Terminal Form | Gull Wing |
| Temperature Grade | Industrial |
| Technology | CMOS |
| Packaging | Tape & Reel (R suffix) |
| Architecture | Von Neumann (M68HC08 Family) |
MC908QY2ACDWER 16-soic (0.295in, 7.50mm width) Pin Configuration Guide
Pin configuration for MC908QY2ACDWER (16-soic (0.295in, 7.50mm width) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC908QY2ACDWER.
Refer to the datasheet for full pin configuration.
Typical Applications
MC908QY2ACDWER is suitable for 6 applications: Small Appliance Control, Low-Cost Motor Speed Control, Battery Charger Sequencing, Sensor Signal Conditioning Nodes, Industrial Timing and Sequencing Modules, Legacy Board Repair and Replacement.
Small Appliance Control
The MC908QY2ACDWER fits small appliance control boards such as coffee makers, fans, and kettles because its 14 I/O lines cover button sensing, relay or triac driving, and indicator LEDs, while the 1.5KB FLASH is sufficient for state-machine firmware. Running from a 5V industrial-grade supply in CMOS, it tolerates the electrically noisy environment near mains switching, and the on-chip ADC reads NTC thermistors directly for temperature regulation. The 16-SOIC package keeps PCB area and cost minimal, and in-circuit FLASH programming supports firmware touch-up during production without desoldering the MCU.
Recommended
Low-Cost Motor Speed Control
With its PWM timer channels and 14 I/O lines, the MC908QY2ACDWER implements simple DC motor or fan speed control at 5V. Firmware generates a PWM waveform from the timer module, the ADC samples a speed feedback signal or potentiometer setpoint, and closed-loop proportional control fits easily within the 1.5KB FLASH budget for single-loop applications. The 8MHz CPU08 core provides adequate cycle headroom for PWM servicing plus control arithmetic at industrial temperatures. Because the HC08Q family spans 1.5KB to 8KB in the same SOIC-16 footprint, designers can start with the QY2 and move to the QY8 without PCB changes if control complexity grows.
Recommended
Battery Charger Sequencing
The MC908QY2ACDWER serves as a charge-sequencing controller in simple NiMH and lead-acid chargers. Its on-chip ADC monitors battery voltage and current-sense inputs, the 14 I/O lines drive charge-enable FETs and status LEDs, and the 5V industrial-grade operation matches common charger power trees. A state machine covering pre-charge, fast charge, taper, and termination fits comfortably in 1.5KB FLASH, and timer channels provide the required timeout and PWM trickle modes. The CMOS process keeps idle current low for charger standby compliance, and the SOIC-16 gull-wing package withstands reflow assembly in high-volume charger manufacturing.
Recommended
Sensor Signal Conditioning Nodes
In distributed sensor nodes, the MC908QY2ACDWER reads analog sensors through its on-chip ADC, applies offset and scaling corrections in firmware, and toggles digital outputs or simple serial signaling via its 14 I/O lines. The 3.3V or 5V supply flexibility lets the MCU match either legacy 5V sensor rails or modern 3.3V logic domains, and the industrial temperature grade supports outdoor and factory-floor mounting. The 8MHz CPU08 core executes filtering routines at sample rates adequate for slow physical variables such as temperature, level, and pressure. In-circuit FLASH programming permits calibration constants to be written at end-of-line testing.
Recommended
Industrial Timing and Sequencing Modules
The MC908QY2ACDWER replaces discrete RC timer circuits in industrial sequencing panels, providing precise, adjustable delays via its timer channels and crystal or internal oscillator clocking. Firmware implements multi-stage sequences, interlocks, and retry logic within the 1.5KB FLASH, while 14 I/O lines interface directly to PLC-level inputs, relay drivers, and status annunciators. The industrial temperature grade and CMOS noise immunity suit panel environments with motor contactor transients, and the small 16-SOIC footprint mounts on dense interface boards. Field configuration changes are handled through in-circuit FLASH reprogramming using the MON08 interface.
Recommended
Legacy Board Repair and Replacement
Because the M68HC08 HC08Q family remains in distribution through NXP and life-cycle channels such as Rochester Electronics, the MC908QY2ACDWER is a primary stocking choice for maintaining legacy equipment whose original 8-bit MCUs are obsolete. Its pin-compatible family members (QY2ACDWE, MCHC908QY2CDWER, QY8 parts) let repair shops substitute whichever memory size and grade is in stock without layout changes. The CMOS 5V-tolerant I/O matches the signaling of 1990s-era boards, the SOIC-16 gull-wing package solders onto existing footprints, and firmware extracted from donor parts can be reprogrammed into FLASH via MON08.
Recommended
Recommended Products Summary
Engineering reference data for MC908QY2ACDWER — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC908QY2ACDWE | MCHC908QY2CDWER | MC908QY8CDWE | MC68HC908LB8CDWE |
|---|---|---|---|---|---|
| Package | 16-SOIC (7.50mm, DWE) | 16-SOIC (DWE) - same | 16-SOIC (DWE) - same | 16-SOIC (DWE) - same | 16-SOIC (DWE) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Program FLASH | 1.5KB | 1.5KB | 1.5KB | 8KB | 8KB |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Core | HC08 (CPU08) 8-bit CISC | HC08 CPU08 | HC08 CPU08 | HC08 CPU08 | HC08 CPU08 |
| Supply Voltage | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 3.3 V / 5 V | 5 V |
| Peripherals | ADC, PWM | ADC, PWM | ADC, PWM | ADC, PWM | ADC, PWM, LIN-oriented timers |
| Packaging | Tape & Reel | Tray | Tape & Reel | Tray | Tape & Reel |
Key Differentiators
- Lowest-cost entry point of the SOIC-16 HC08Q family (vs MC908QY8CDWE)
- Tape-and-reel packing for automated assembly (vs MC908QY2ACDWE)
- Identical footprint upgrade path (vs MC908QY8CDWE)
Design Notes
The QY2 is the smallest FLASH option (1.5KB) in the HC08Q family. Before committing, compile your firmware with the target memory map and reserve at least 15% headroom for maintenance releases. If headroom is tight, the MC908QY8CDWE offers 8KB in the identical 16-SOIC footprint, so qualifying both on one PCB is a cheap hedge. Also confirm MON08 monitor-mode entry conditions (specific voltage/timing on IRQ and reset at power-up) are reachable on your board if field reprogramming is planned.
Decouple VDD with a 100nF ceramic capacitor placed within a few millimeters of the pin, plus a bulk 4.7-10uF capacitor per board. The ADC reference is derived from the supply, so any ripple from relay or triac switching in appliance applications appears directly in conversions; add an RC filter (e.g., 100 ohm + 1uF) on analog inputs and synchronize ADC sampling away from load-switching instants in firmware.
Keep the oscillator traces short and guard them from PWM and relay-driver traces. Route a solid ground plane under the MCU where possible; the SOIC-16 gull-wing package has no exposed pad, so all thermal and ground return flows through pins - keep high-current loads (relays, lamps) off the same ground spur as the MCU. Provide MON08 programming pads for VDD, VSS, IRQ, RST, and the monitor pin at board edge for production programming.
Beware counterfeit risk when buying this mature HC08 part from brokers: counterfeiters frequently re-mark smaller HC08 dies as higher-memory variants. Purchase only from authorized distribution (DigiKey, Mouser) or the Rochester Electronics life-cycle channel, and verify supplier authenticity certificates for production buys. All alternatives listed here are same-brand NXP parts; no cross-brand pin-compatible equivalent was found in cross-reference data, so avoid substitution by different 8-bit architectures without full redesign.
Compliance Information
Compliance status not stated in the retrieved distributor data; verify against the NXP official product page and material declaration reports before ordering for regulated markets.
