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NXP Semiconductors MC68HC908QY1CPE
- Part No.:
- MC68HC908QY1CPE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MC68HC908QY1CPE.pdf
- Description:
- IC MCU 8BIT 1.5KB FLASH 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,302
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Product details
Overview
MC68HC908QY1CPE from NXP (formerly Freescale) is an 8-bit HCS08-core microcontroller in a 16-pin SOIC package, featuring 1 KB FLASH, 64 bytes RAM, on-chip 8-channel 8-bit ADC, internal RC oscillator (4 MHz typical), and integrated COP watchdog. It targets low-cost, space-constrained embedded control in appliance motor interfaces and industrial sensor nodes.
For engineers reviewing the MC68HC908QY1CPE datasheet, MC68HC908QY1CPE pinout, MC68HC908QY1CPE application, or MC68HC908QY1CPE equivalent, key selection criteria include its 16-pin SOIC footprint, 1 KB FLASH memory size, internal RC oscillator operation without external crystal, 8-bit ADC resolution with software-selectable clock prescaler, and support for WAIT/STOP low-power modes.
Technical Context
The MC68HC908QY1CPE implements the M68HC08 CPU core with 16-bit address bus and 8-bit data path, executing instructions at up to 4 MHz bus clock derived from its factory-trimmed internal RC oscillator. Its memory map includes 1 KB of reprogrammable FLASH (with block protection), 64 bytes of RAM, and dedicated I/O register space mapped to $00–$FF.
Peripherals include an 8-channel 8-bit successive-approximation ADC with configurable conversion time (16–64 µs), a 16-bit timer interface module (TIM) with input capture/output compare, keyboard interrupt (KBI) support on Port A pins, and low-voltage inhibit (LVI) reset at 2.7 V nominal with hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC08 8-bit CISC core with 16-bit addressing, supports WAIT/STOP low-power states. |
| FLASH Memory | 1 KB on-chip FLASH with page/mass erase, block protection register (FLBPR), and 10,000 write/erase cycles. |
| RAM Size | 64 bytes of on-chip RAM, retained in WAIT mode but lost in STOP mode unless external hold circuitry used. |
| ADC Resolution | 8-bit successive-approximation ADC with 8 selectable input channels, 16–64 µs conversion time depending on prescaler setting. |
| Oscillator | Factory-trimmed internal RC oscillator, 4 MHz typical at 5 V/25°C; no external crystal required for basic operation. |
| Package | 16-pin SOIC (Small Outline Integrated Circuit), 300 mil width, JEDEC MS-012AC standard footprint. |
| Supply Voltage | 2.7 V to 5.5 V operation; LVI reset threshold fixed at 2.7 V ±0.1 V with 100 mV hysteresis. |
Pinout & Package
MC68HC908QY1CPE uses a 16-pin SOIC (Small Outline IC) package with 300-mil body width and standard JEDEC MS-012AC dimensions (10.16 mm × 7.49 mm). Pin 1 is marked by a notch or dot; pin numbering follows counterclockwise convention from top-left corner when viewed with marking side up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main positive supply rail (2.7–5.5 V); decoupling capacitor required at pin for stable operation. |
| VSS | Ground | Digital ground reference; must be connected to system common ground plane. |
| PTA0–PTA3 | Port A I/O | Bi-directional CMOS I/O pins with programmable data direction; PTA0–PTA3 support KBI wake-up function. |
| PTB0–PTB3 | Port B I/O | Bi-directional CMOS I/O pins; PTB0–PTB3 also serve as ADC input channels AN0–AN3 respectively. |
| OSC1 / XTAL1 | Oscillator input | Crystal amplifier input; unused when internal RC oscillator selected; requires 32.768 kHz crystal for external clock option. |
| OSC2 / PTA4 / BUSCLKX4 | Oscillator output / I/O / clock out | Crystal amplifier output or general-purpose I/O; outputs 4× bus clock when enabled; shares pin with PTA4. |
| RESET | Active-low reset | Asynchronous reset input; internal pull-up; asserts full chip reset on falling edge; debounced internally. |
| IRQ | External interrupt | Edge-triggered (rising/falling configurable) external interrupt input; highest priority non-maskable interrupt source. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip FLASH programming | Enables in-system reprogramming via single-wire background debug mode (BDM), eliminating need for external programmer hardware. |
| Internal RC oscillator | Eliminates external crystal/capacitor components, reducing BOM cost and PCB area - ideal for cost-sensitive consumer applications. |
| Keyboard interrupt (KBI) | Hardware scan logic on PTA0–PTA3 detects key press/release events and wakes MCU from WAIT/STOP mode with minimal firmware overhead. |
| Low-voltage inhibit (LVI) | Prevents erratic operation during brown-out by forcing reset at 2.7 V; hysteresis avoids chatter near threshold, ensuring reliable power-up sequencing. |
| Auto wakeup module (AWU) | Generates periodic interrupts (1 ms to 1.024 s intervals) from STOP mode using internal RC clock, enabling deterministic low-power polling without external timer. |
Applications
| Home Appliance Motor Control | Industrial Sensor Node |
|---|---|
Use Scenario: Speed and direction control of small DC brush motors in washing machine drain pumps or HVAC blower fans. IC Role / Device Role / Timing Role: Primary system controller executing motor commutation logic, reading hall-effect feedback, and managing PWM output via TIM module. Use Value: 1 KB FLASH accommodates closed-loop PID firmware; internal oscillator eliminates timing component cost; 8-bit ADC reads current-sense resistor voltage directly. | Use Scenario: Battery-powered temperature/humidity monitoring node transmitting data via UART to gateway every 5 minutes. IC Role / Device Role / Timing Role: System-on-chip managing sensor acquisition (via ADC), sleep scheduling (AWU), and serial communication (SCI). Use Value: STOP mode draws <1 µA; AWU provides precise wake interval; on-chip FLASH stores calibration coefficients and firmware updates. |
| Consumer Remote Control Interface | Smart Power Outlet Monitoring |
Use Scenario: IR remote receiver decoding and button matrix scanning in universal remotes or set-top box controllers. IC Role / Device Role / Timing Role: Dedicated KBI-enabled I/O handles 4×4 keypad scan; SCI transmits decoded commands to host MCU or executes local logic. Use Value: Hardware KBI reduces CPU load during idle; internal oscillator ensures consistent timing across units without crystal matching. | Use Scenario: AC mains-powered smart outlet measuring load current and reporting over RS-485 to building management system. IC Role / Device Role / Timing Role: Analog front-end controller digitizing shunt voltage (via ADC), calculating RMS current, and driving isolated UART interface. Use Value: 64-byte RAM sufficient for real-time calculation buffers; LVI prevents corruption during line sags; 16-pin SOIC fits compact PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC908QY2CPE | 2 KB FLASH, same 16-pin SOIC package, identical peripheral set and pinout. | Supports larger firmware images (e.g., added communication stacks or diagnostics), otherwise drop-in compatible. | Select when firmware exceeds 1 KB or future expansion headroom is required. |
| MC9RS08KA2CSC | Renesas S08 core derivative; 2 KB FLASH, 128 bytes RAM, enhanced BDM, same 16-pin SOIC. | Offers improved debug capability and higher EEPROM endurance; not pin-compatible due to RESET/IRQ pin swap. | Choose for new designs needing better toolchain support and longer product lifecycle; requires PCB revision. |
Compared with MC68HC908QY2CPE and MC9RS08KA2CSC, the MC68HC908QY1CPE delivers optimal cost/performance for fixed-function, memory-constrained applications where 1 KB FLASH suffices and legacy toolchain compatibility is prioritized.
Availability
MC68HC908QY1CPE is available at Aetrix Electronics and suitable for home appliance motor control, industrial sensor nodes, consumer remote control interfaces, and smart power outlet monitoring requiring stable component supply and long-term manufacturing continuity.
Supply support for MC68HC908QY1CPE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor company formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions and embedded processing.
The MC68HC908QY/QT family was designed by Freescale (now NXP) for cost-sensitive, low-pin-count 8-bit control applications requiring integrated analog peripherals, robust reset supervision, and minimal external components.
FAQ
What is the maximum operating frequency of the MC68HC908QY1CPE?
The MC68HC908QY1CPE operates with a maximum bus clock frequency of 4 MHz, derived from its factory-trimmed internal RC oscillator. This frequency is specified at 5 V and 25°C; actual achievable speed varies with supply voltage and temperature, and the device does not support external crystal oscillation above 4 MHz in this variant.
Does the MC68HC908QY1CPE support in-circuit debugging?
Yes, the MC68HC908QY1CPE supports single-wire background debug mode (BDM) via the BKGD pin, enabling full in-circuit debugging including breakpoint setting, register inspection, and FLASH programming without halting real-time operation. The BDM interface requires only one dedicated pin and compatible debugger hardware.
Can the MC68HC908QY1CPE operate from a 3.3 V supply?
Yes, the MC68HC908QY1CPE is fully specified for operation from 2.7 V to 5.5 V, including 3.3 V nominal systems. At 3.3 V, the internal RC oscillator runs at approximately 2.8 MHz (±15% tolerance), and all I/O remains 5 V tolerant - allowing direct interfacing with 5 V peripherals without level shifters.
How many ADC channels does the MC68HC908QY1CPE have, and what is their resolution?
The MC68HC908QY1CPE integrates an 8-bit successive-approximation ADC with 8 selectable input channels (AN0–AN7), though only AN0–AN3 are routed to physical pins (PTB0–PTB3) in the 16-pin SOIC package. Conversion time ranges from 16 µs to 64 µs depending on the ADC clock prescaler setting configured in the ADCCFG register.
Is the MC68HC908QY1CPE pin-compatible with other members of the QY/QT family?
Yes, the MC68HC908QY1CPE is fully pin-compatible with MC68HC908QY2CPE and MC68HC908QY4CPE in the same 16-pin SOIC package, sharing identical pin functions, electrical characteristics, and peripheral mappings - differing only in FLASH size (1 KB, 2 KB, and 4 KB respectively) and associated memory configuration bits.
MC68HC908QY1CPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- Series:
- HC08
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 13
- Program Memory Size:
- 1.5KB (1.5K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
MC68HC908QY1CPE FAQ
1.How can I place an order for MC68HC908QY1CPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC908QY1CPE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC68HC908QY1CPE reliable?
The price and inventory of MC68HC908QY1CPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC908QY1CPE is usually 5 days.
3.What payment methods are accepted for MC68HC908QY1CPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC908QY1CPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC908QY1CPE?
MC68HC908QY1CPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC908QY1CPE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC68HC908QY1CPE?
For technical support, including MC68HC908QY1CPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC908QY1CPE requirements.
6.How does Aetrix verify that MC68HC908QY1CPE is sourced from the original manufacturer or authorized distributors?
All MC68HC908QY1CPE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC68HC908QY1CPE meets industry standards.
7.What is the process for return or replacement of MC68HC908QY1CPE?
All MC68HC908QY1CPE units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC908QY1CPE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC68HC908QY1CPE part is unused and in its original packaging.
Return procedure for MC68HC908QY1CPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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