MC68HC908QY2MP - 8-bit MCU 8MHz 1.5KB Flash 16-PDIP | Freescale
MPN: MC68HC908QY2MP ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.46 | $44.60 |
| 100 | $3.97 | $397.00 |
| 500 | $3.57 | $1,785.00 |
| 1,000 | $3.22 | $3,220.00 |
MC68HC908QY2MP Overview
A microcontroller unit (MCU) is a single-chip computer that integrates a processor core, memory, and peripherals on one die. Within the embedded systems hierarchy, the MC68HC908QY2 belongs to the 8-bit microcontroller class, positioned as a low-pin-count member of the M68HC08 family - a lineage that evolved from the classic 6805/HC05 architecture and precedes the S08 and ColdFire families. The HC08 CPU core executes the HC08 instruction set with efficient byte-level operations suited to cost-sensitive control tasks.
Key features of the MC68HC908QY2MP include the HC08 CPU core at 8 MHz internal bus operation, on-chip flash memory allowing in-circuit reprogramming, and an integrated analog-to-digital converter (per Jotrin: 1.5K FLASH with ADC). The quad-family (QY/QT) HC08 parts integrate oscillator, timer modules, and I/O into a compact 16-pin footprint, making them classic choices for board-space-constrained and through-hole designs.
Technically, the device uses flash-based program storage with on-chip charge pump for erase/program operations, plus an enhanced serial peripheral and monitoring capability via the single-wire background debug interface used across the HC08 family. Low-voltage inhibit reset, computer operating properly (COP) watchdog, and oscillators are on-chip, minimizing external component count.
Typical applications include small appliance control, battery chargers, simple sensor interfaces, industrial timers, and legacy-equipment maintenance where a through-hole 16-PDIP 8-bit MCU is required.
Design consideration: verify flash density (1.5 KB) and available ADC channels against your code size before committing; the QY2 is the smallest flash density in the QY4/QY2/QY1 family ladder.
This page synthesizes distributor availability, same-family drop-in alternatives, and procurement guidance for this legacy part not found in the manufacturer datasheet.
Drop-in alternatives for MC68HC908QY2MP — 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 MC68HC908QY2MP (same form factor and footprint) — differing in Core Processor, Package, Mounting Type, Program Memory Size, Peripherals.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC68HC908QY2CPE
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View Datasheet →MC68HC908QY2MPE
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View Datasheet →MC908QY4AMPE
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View Datasheet →MC68HC908QY1MPE
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View Datasheet →MC908QT2ACPE
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View Datasheet →MC68HC908QT2MPE
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →MC908QT1ACPE
✅ Drop-In✓ In Stock
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View Datasheet →MC68HC908QY2MP Maximum Ratings & Electrical Characteristics
| Core Processor | M68HC08 (HC08 CPU) |
| Core Size | 8-Bit |
| Maximum Clock Frequency | 8 MHz |
| Program Memory Type | FLASH |
| Program Memory Size | 1.5KB (1.5K x 8) |
| Analog Peripherals | On-chip ADC |
| Peripherals | Timer, COP watchdog, LVI |
| Package | 16-PDIP |
| Mounting Type | Through Hole |
| Architecture | 8-BIT, FLASH, 68HC08 CPU, 8MHZ |
| EEPROM Size | N/A (none on this device) |
| Programmability | In-circuit reprogrammable flash |
MC68HC908QY2MP 16-pdip Pin Configuration Guide
Pin configuration for MC68HC908QY2MP (16-pdip 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 MC68HC908QY2MP.
Refer to the datasheet for full pin configuration.
Typical Applications
MC68HC908QY2MP is suitable for 6 applications: Small Appliance Control, Battery Charger Management, Industrial Timers and Sequencers, Legacy Equipment Maintenance and Repair, Simple Sensor Interfaces, Educational and Hobbyist 8-bit Projects.
Small Appliance Control
The MC68HC908QY2MP fits small appliance control boards such as coffee makers, blenders, and fan controllers where a simple key-scan, LED indication, and timer loop are the entire firmware. Its 8 MHz HC08 core provides ample compute for these deterministic loops, the 1.5KB flash holds complete control programs, and the integrated ADC reads thermistor inputs without an external converter. The 16-PDIP through-hole package is common in cost-driven, hand-assembled appliance PCBs, and the COP watchdog plus low-voltage inhibit reset deliver safe recovery from brown-out conditions in mains-powered products. Firmware is reprogrammable in-circuit via monitor mode, allowing last-minute feature tweaks without mask ROM risk.
Recommended
Battery Charger Management
Battery charger boards use the MC68HC908QY2MP's on-chip ADC to monitor cell voltage and current-sense inputs, executing charge-profile state machines in the HC08 core. The 1.5KB flash accommodates CC/CV and trickle-charge algorithms with safety cutoffs, while timer modules generate PWM for charger FET drive. The COP watchdog guards against firmware lock-up during charge, a safety-relevant failure mode. Its through-hole 16-PDIP footprint suits repairable charger adapters and legacy designs already qualified around the HC908QY family, where the low-voltage inhibit reset protects charging decisions during supply dips. Drop-in family members (QY4A) extend flash for richer charge algorithms on the same PCB.
Recommended
Industrial Timers and Sequencers
Simple industrial timing and sequencing boards - pump cycling, purge timers, relay sequencing - map naturally onto the MC68HC908QY2MP. The 8 MHz HC08 core executes time-base interrupts deterministically, timer peripherals generate accurate delays, and GPIO drives opto-isolated relay channels. The 1.5KB flash is sufficient for parameter tables and scaling logic read via the ADC (potentiometer settings). Through-hole 16-PDIP mounting supports panel-mounted replacement boards maintained by factory technicians, an important consideration for machinery that must stay in service for decades. The COP watchdog guarantees recovery from transient industrial noise, and family pin compatibility allows flash upgrades without PCB respins.
Recommended
Legacy Equipment Maintenance and Repair
For service organizations maintaining equipment designed around the HC908QY family, the MC68HC908QY2MP is the correct spare: it matches the original Motorola ordering option and socket layout exactly. Its flash memory allows reflashing archived firmware images using MON08-based legacy programmers, restoring boards without mask-ROM supply problems. The 8 MHz HC08 core, 1.5KB flash, on-chip ADC, and 16-PDIP package keep repair inventory interchangeable across product generations that used QY1/QY2/QY4 variants. Because the part is obsolete, authorized aftermarket supply via Rochester Electronics is the qualified channel; holding a small buffer stock against long repair cycles is a common procurement strategy.
Recommended
Simple Sensor Interfaces
Low-channel-count sensor front ends - temperature thresholds, level detection, potentiometer digitization - are handled by the MC68HC908QY2MP's integrated ADC and HC08 core. The 8 MHz bus provides adequate throughput for averaging filters, and the 1.5KB flash stores calibration constants alongside application code. Digital outputs report status to PLCs or indicators directly, removing the need for a separate comparator stage. The 16-PDIP through-hole package suits prototype and small-batch instrumentation where hand rework is expected, and monitor-mode programming supports field calibration updates. Family members MC908QY4A (more flash) and MC68HC908QT2 (ADC-emphasis variant) let designers scale memory or cost without changing the PCB footprint.
Recommended
Educational and Hobbyist 8-bit Projects
The MC68HC908QY2MP remains attractive for teaching classic 8-bit embedded concepts: a through-hole 16-PDIP part can be inserted into a breadboard, programmed via MON08 with low-cost tools, and observed with basic lab equipment. Its 1.5KB flash forces economical coding, and the HC08 instruction set illustrates accumulator-and-index-register architectures foundational to embedded engineering. The on-chip ADC, timer, and COP peripherals demonstrate real microcontroller subsystems without external components. Compared with active parts like the MC9S08QG4, documentation and legacy toolchain availability from the Motorola era make the QY2 a well-documented classroom device for courses covering embedded systems history and fundamentals.
Recommended
Recommended Products Summary
Engineering reference data for MC68HC908QY2MP — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC68HC908QY2CPE | MC68HC908QY2MPE | MC908QY4AMPE | MC68HC908QT2MPE |
|---|---|---|---|---|---|
| Package | 16-PDIP | 16-PDIP - same | 16-PDIP - same | 16-PDIP - same | 16-PDIP - same |
| Brand | Freescale Semiconductor (NXP Semiconductors) | Freescale/Motorola (NXP) | Freescale/Motorola (NXP) | Freescale/Motorola (NXP) | Freescale/Motorola (NXP) |
| Core / Architecture | M68HC08, 8-Bit | M68HC08, 8-Bit | M68HC08, 8-Bit | M68HC08, 8-Bit (QY4A) | M68HC08, 8-Bit |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz class | 8 MHz |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Lifecycle Status | Obsolete (aftermarket via Rochester Electronics) | Obsolete (aftermarket) | Obsolete (aftermarket) | Obsolete (aftermarket) | Obsolete (aftermarket) |
Key Differentiators
- Exact legacy ordering-option match for existing HC08 designs (vs MC908QY4AMPE)
- Larger on-chip flash within the same 16-PDIP footprint (vs MC68HC908QY1MPE)
- Integrated ADC versus ADC-free QT family siblings (vs MC68HC908QT2MPE)
Design Notes
This part is obsolete: original Motorola/Freescale production has ended and authorized supply comes through Rochester Electronics LLC (as listed by DigiKey). For new designs, migrate to the active S08 family (MC9S08QG4/QG8) or Kinetis KL series. For sustaining designs, qualify a second suffix variant (MC68HC908QY2CPE) and verify flash density against worst-case code size before committing the BOM.
The exact supply voltage range is not confirmed in the verified data for this suffix (marked DATA_NEEDED). HC08-family parts of this class typically operate from a 5V-tolerant single rail, but the design engineer must confirm the operating range, brown-out thresholds, and LVI trip points from the Motorola MC68HC908QY2 datasheet ordering/electrical tables before finalizing the power tree. Estimate all rail tolerances against the datasheet, not family assumptions.
As a 16-PDIP through-hole device in monitor/programming mode, the MON08 pin configuration (specific strap levels on IRQ/reset-related pins) determines whether the part enters user code or monitor mode on reset. Ensure programming-header straps do not load sensitive pins during normal operation; use a jumpered header or series resistors so production boards reset cleanly into application code while retaining field-reprogramming capability via legacy P&E MON08-class tools.
Compliance Information
Compliance data for this Motorola/Freescale legacy part was not present in the verified web data; as an obsolete device, RoHS-exempt status may apply to aftermarket replacements - confirm with the supplier (Rochester Electronics) at time of order.
