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NXP Semiconductors MC68HC908QY1VDTE
- Part No.:
- MC68HC908QY1VDTE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC68HC908QY1VDTE.pdf
- Description:
- IC MCU 8BIT 1.5KB FLASH 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,407
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Product details
Overview
MC68HC908QY1VDTE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 1 KB FLASH, 64 bytes RAM, and integrated 8-channel 8-bit ADC, designed for low-cost embedded control in space-constrained industrial sensors and appliance motor interfaces. It operates at up to 8 MHz bus frequency, supports internal RC oscillator (±2% typical), and features on-chip COP watchdog, LVI reset, and keyboard interrupt module.
For engineers reviewing the MC68HC908QY1VDTE datasheet, MC68HC908QY1VDTE pinout, MC68HC908QY1VDTE application, or MC68HC908QY1VDTE equivalent, key selection criteria include its 16-pin SOIC package, 5 V operation, single-supply ADC reference, and compatibility with Freescale's HC08 development tools and MON08 debug interface.
Technical Context
The MC68HC908QY1VDTE implements the M68HC08 CPU core with 16-bit address bus, supporting direct, extended, and indexed addressing modes. Its memory map includes 1 KB of reprogrammable FLASH (with block protection), 64 bytes of RAM, and 32 bytes of EEPROM-equivalent data storage via FLASH emulation.
Peripherals include an 8-channel 8-bit successive-approximation ADC with programmable conversion time (16–64 µs), a 16-bit timer with input capture/output compare, auto-wakeup module with programmable sleep intervals (1–1024 ms), and dual interrupt sources (IRQ and KBI) with priority arbitration handled by the SIM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC08 8-bit CISC core with 16-bit address bus and 32-instruction set extensions |
| FLASH Memory | 1 KB on-chip FLASH with page erase, mass erase, and block protection register (FLBPR) |
| RAM Size | 64 bytes of static RAM, mapped at $0000–$003F, used for stack and variables |
| ADC Resolution | 8-bit successive-approximation ADC with 8 selectable input channels and internal 2.5 V reference |
| Max Bus Frequency | 8 MHz (at VDD = 4.5–5.5 V), derived from internal RC oscillator or external crystal |
| Operating Voltage | 4.5 V to 5.5 V - ensures compatibility with legacy 5 V logic families and industrial power rails |
| Package Type | 16-pin SOIC (Small Outline Integrated Circuit), 300 mil width, JEDEC MS-012AC |
Pinout & Package
MC68HC908QY1VDTE is housed in a 16-pin SOIC package (case #751B-03), with 0.050" lead pitch and standard thermal profile for reflow soldering. Pin functions are defined per shared-resource priority table in Rev. 6 datasheet Section 1.6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 5 V supply rail; decoupling capacitor required at pin for stable core and ADC operation |
| VSS | Ground | Digital ground reference; must be connected to system GND plane with low-inductance path |
| OSC1/XTAL | Crystal input | Connects to one terminal of 32.768 kHz or 1–8 MHz crystal; internal feedback resistor enabled |
| OSC2/PTA4/BUSCLKX4 | Crystal output / I/O / clock out | Drives crystal second terminal; also outputs 4× bus clock for external timing sync or test probing |
| PTA0–PTA7 | Port A bidirectional I/O | 8-bit port with individual direction control (DDRA); PTA0–PTA3 double as ADC inputs (AN0–AN3) |
| PTB0–PTB3 | Port B bidirectional I/O | 4-bit port; PTB0–PTB2 serve as additional ADC inputs (AN4–AN6); PTB3 is IRQ input |
| RESET | Active-low reset | Asynchronous reset input; internal pull-up; triggers full hardware reset and clears all registers |
| MONI | Monitor mode entry | Low-level pulse initiates MON08 debug mode; requires specific voltage ramp and timing per Section 15.2 |
Key Features
| Feature | Design Value |
|---|---|
| On-chip COP watchdog | Configurable timeout (0.5–2048 ms) prevents runaway code; reset triggered on timeout or illegal COPCTL write |
| Low-voltage inhibit (LVI) | Programmable trip point (4.25 V or 3.8 V) with hysteresis prevents erratic operation during brownout conditions |
| Keyboard interrupt (KBI) | Hardware scan of up to 8 keys with debounce filtering and wake-from-sleep capability |
| Auto-wakeup module (AWU) | Generates periodic interrupts without CPU intervention; enables ultra-low-power sensor polling at fixed intervals |
| FLASH block protection | FLBPR register locks FLASH pages against accidental erase/write; supports field firmware updates with protected bootloader section |
Applications
| Industrial Temperature Sensor Node | Home Appliance Motor Control |
|---|---|
Use Scenario: Standalone temperature monitoring node with thermistor input, LED status indicator, and relay output. IC Role / Device Role / Timing Role: Primary controller executing ADC sampling, linearization, threshold comparison, and relay drive logic. Use Value: Integrated 8-bit ADC eliminates external converter; 1 KB FLASH accommodates calibration tables and control algorithm; SOIC package fits compact PCB layouts. | Use Scenario: Fan speed control in washing machine using back-EMF sensing and PWM-driven triac interface. IC Role / Device Role / Timing Role: Real-time motor commutation supervisor with ADC-based zero-cross detection and 16-bit TIM-generated PWM. Use Value: 8 MHz bus clock enables sub-millisecond loop timing; KBI handles user interface buttons; LVI ensures safe shutdown during line dips. |
| Smart Power Outlet Controller | Legacy RS-232 Device Interface Adapter |
Use Scenario: AC outlet with energy monitoring, local push-button control, and overcurrent cutoff. IC Role / Device Role / Timing Role: System manager handling current-sense ADC, button debouncing, relay actuation, and fault logging to FLASH. Use Value: On-chip COP guarantees recovery from transient glitches; AWU enables periodic self-test without external RTC; 64-byte RAM suffices for state retention. | Use Scenario: Protocol translator between RS-232 serial port and modern I²C sensor network. IC Role / Device Role / Timing Role: UART-to-I²C bridge controller with baud-rate generation via TIM and software bit-banged I²C master. Use Value: Internal RC oscillator provides stable 8 MHz base clock for precise 9600/115200 baud generation; 16-pin SOIC simplifies level-shifter integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC68HC908QY2VDTE | 2 KB FLASH, same 64-byte RAM, identical pinout and peripheral set | Supports larger firmware images (e.g., multi-sensor fusion algorithms or expanded communication stacks) | Select when firmware size exceeds 1 KB or future scalability is required; no PCB change needed |
| MC9RS08KA2CPD | RSA08 core, 2 KB FLASH, 128 bytes RAM, 10-bit ADC, 20 MHz max bus clock | Higher performance and resolution, but requires different toolchain and lacks KBI module | Choose for new designs needing higher ADC accuracy or faster throughput; not drop-in compatible |
Compared with MC68HC908QY2VDTE and MC9RS08KA2CPD, the MC68HC908QY1VDTE offers optimal cost/performance balance for simple 8-bit control tasks where 1 KB FLASH and 8-bit ADC precision are sufficient, while retaining full toolchain continuity within the HC08 ecosystem.
Availability
MC68HC908QY1VDTE is available at Aetrix Electronics and suitable for industrial temperature sensors, home appliance motor controllers, smart power outlets, and legacy RS-232 interface adapters requiring stable component supply across long production lifecycles.
Supply support for MC68HC908QY1VDTE 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
Freescale Semiconductor (now part of NXP Semiconductors) is a pioneer in 8-bit microcontroller architecture, known for robust automotive and industrial-grade silicon with long-term product longevity.
The MC68HC908QY/QT family was engineered for cost-sensitive, space-constrained embedded control applications demanding high reliability, low power, and seamless integration with legacy 5 V systems.
FAQ
What is the maximum operating frequency of the MC68HC908QY1VDTE?
The MC68HC908QY1VDTE supports a maximum bus clock frequency of 8 MHz when powered at 4.5–5.5 V. This frequency is derived either from the internal trimmed RC oscillator (±2% typical accuracy) or an external crystal connected to OSC1/OSC2 pins. The CPU executes instructions at this bus rate, enabling deterministic real-time response for control loops and sensor sampling.
Does the MC68HC908QY1VDTE include an analog-to-digital converter (ADC)?
Yes, the MC68HC908QY1VDTE integrates an 8-bit successive-approximation ADC with eight input channels (AN0–AN7). Four channels are multiplexed onto Port A (PTA0–PTA3), and three onto Port B (PTB0–PTB2); AN7 is dedicated to internal temperature sensor. Conversion time is programmable between 16 µs and 64 µs, and the ADC uses an internal 2.5 V reference.
Can the MC68HC908QY1VDTE operate from a 3.3 V supply?
No, the MC68HC908QY1VDTE is specified only for 4.5 V to 5.5 V operation per its electrical characteristics (Section 16.1). It lacks 3.3 V logic compatibility or internal voltage regulation. For 3.3 V systems, consider later-generation RS08 or S08 devices such as MC9RS08KA2, which explicitly support 1.8–3.6 V operation.
How is debug and programming performed on the MC68HC908QY1VDTE?
Debug and programming use the MON08 single-wire background debug interface via the MONI pin. A compatible programmer (e.g., P&E Micro USB-ML-MON08) applies a specific voltage ramp and timing sequence to enter monitor mode, allowing FLASH erase/program, register read/write, and breakpoint execution without dedicated JTAG pins. No external debugger header is required.
Is there hardware support for keyboard scanning in the MC68HC908QY1VDTE?
Yes, the MC68HC908QY1VDTE includes a dedicated Keyboard Interrupt Module (KBI) that supports hardware scanning of up to eight keys with built-in debounce filtering and wake-from-sleep capability. KBI uses Port A pins (PTA0–PTA7) configured as inputs with internal pull-ups, and generates interrupts on key press/release transitions without CPU polling overhead.
MC68HC908QY1VDTE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Series:
- HC08
- Packaging:
- Tube
- Product Status:
- Not For New Designs
- 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 ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC68HC908QY1VDTE FAQ
1.How can I place an order for MC68HC908QY1VDTE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC908QY1VDTE 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 MC68HC908QY1VDTE reliable?
The price and inventory of MC68HC908QY1VDTE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC908QY1VDTE is usually 5 days.
3.What payment methods are accepted for MC68HC908QY1VDTE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC908QY1VDTE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC908QY1VDTE?
MC68HC908QY1VDTE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC908QY1VDTE 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 MC68HC908QY1VDTE?
For technical support, including MC68HC908QY1VDTE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC908QY1VDTE requirements.
6.How does Aetrix verify that MC68HC908QY1VDTE is sourced from the original manufacturer or authorized distributors?
All MC68HC908QY1VDTE 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 MC68HC908QY1VDTE meets industry standards.
7.What is the process for return or replacement of MC68HC908QY1VDTE?
All MC68HC908QY1VDTE units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC908QY1VDTE, 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 MC68HC908QY1VDTE part is unused and in its original packaging.
Return procedure for MC68HC908QY1VDTE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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