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NXP Semiconductors MC68HC908QY4VPE
- Part No.:
- MC68HC908QY4VPE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MC68HC908QY4VPE.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,320
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Product details
Overview
MC68HC908QY4VPE from NXP (formerly Freescale) is an 8-bit HCS08-core microcontroller with 4 KB on-chip FLASH, 192 B RAM, and integrated 8-channel 8-bit ADC. It features internal RC oscillator (1–8 MHz), low-voltage inhibit (LVI), COP watchdog, and keyboard interrupt module - designed for cost-sensitive embedded control in appliance user interfaces and industrial sensor nodes.
For engineers reviewing the MC68HC908QY4VPE datasheet, MC68HC908QY4VPE pinout, MC68HC908QY4VPE application, or MC68HC908QY4VPE equivalent, this page delivers verified package mapping (16-pin SOIC), functional pin roles, real-world use cases in battery-powered controls, and two validated alternative parts with documented electrical and firmware compatibility differences.
Technical Context
The MC68HC908QY4VPE implements the M68HC08 CPU core with 16-bit address bus, supporting up to 64 KB memory space. Its oscillator module supports internal RC trimming (±2% accuracy after calibration), external crystal (up to 8 MHz), and dynamic clock switching between INTCLK and XTALCLK without reset.
Peripheral integration includes a 16-bit TIM module with input capture/output compare, KBI for matrix keypad scanning, AWU for periodic wake-up from STOP mode (minimum 1.5 ms interval), and LVI with programmable trip points (2.5 V or 3.0 V). All I/O ports are CMOS-compatible with configurable pull-ups and slew-rate control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC08 8-bit CISC core, 8 MHz max bus frequency - enables deterministic real-time control with <1 µs instruction cycle at 8 MHz. |
| Memory | 4 KB FLASH (in-system programmable), 192 B RAM - sufficient for small firmware images with data logging buffers. |
| ADC | 8-channel 8-bit SAR ADC, 25 µs conversion time - supports analog sensor interfacing (e.g., thermistors, potentiometers) without external signal conditioning. |
| Oscillator | Internal RC (1–8 MHz, ±2% post-trim), external crystal support - eliminates need for external clock source in most applications. |
| Supply Voltage | 2.7–5.5 V operation - compatible with single-cell Li-ion (3.0–4.2 V) and standard 3.3 V/5 V rails. |
| Low-Power Modes | STOP (0.5 µA typical), WAIT (1.5 µA) - extends battery life in intermittent-sensing applications like smart thermostats. |
| Package | 16-pin SOIC (width 3.9 mm), RoHS-compliant - industry-standard footprint for automated assembly and thermal management. |
Pinout & Package
MC68HC908QY4VPE is housed in a 16-pin Small Outline Integrated Circuit (SOIC) package with 1.27 mm pitch, 3.9 mm body width, and JEDEC MS-012AC compliance. Pin functions are validated per Freescale MC68HC908QY/QT Family Data Sheet, Rev. 6 (2010), Figures 1-2 and Table 1-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 2.7–5.5 V supply rail; requires local 0.1 µF ceramic decoupling. |
| VSS | Ground | Digital ground reference; must be connected to system GND plane with low-inductance path. |
| OSC1 | Crystal amplifier input | Connects to one terminal of external 32.768 kHz or 1–8 MHz crystal; internal load capacitance = 12 pF. |
| OSC2/PTA4/BUSCLKX4 | Crystal amplifier output / Port A bit 4 / 4× bus clock | Drives crystal second terminal; also serves as general-purpose I/O or outputs 4× BUSCLK for timing diagnostics. |
| PTA0–PTA3 | Port A bits 0–3 | CMOS bidirectional I/O with software-configurable pull-ups; used for KBI row/column scanning or GPIO. |
| PTB0–PTB3 | Port B bits 0–3 | Bidirectional I/O with optional internal pull-ups; supports IRQ, AWU, and TIM input capture functions. |
| RESET | Active-low reset input | Asynchronous reset trigger; internal weak pull-up ensures reliable startup without external resistor. |
| IRQ | External interrupt request | Edge-triggered interrupt input (rising/falling configurable); shares pin with PTA7 in multiplexed mode. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip FLASH with block protection | Enables field firmware updates and prevents accidental overwrite of bootloader or calibration constants via FLBPR register. |
| Keyboard Interrupt Module (KBI) | Scans up to 16-key matrix autonomously using PTA0–PTA3 and PTB0–PTB3, reducing CPU overhead during button polling. |
| Auto Wakeup Module (AWU) | Generates periodic interrupts from STOP mode at intervals from 1.5 ms to 2 s - ideal for sensor sampling without continuous power draw. |
| Low-Voltage Inhibit (LVI) | Programmable 2.5 V or 3.0 V reset threshold with hysteresis prevents erratic operation during brown-out conditions. |
| Computer Operating Properly (COP) | Configurable timeout (0.5 ms–1.6 s) watchdog with software disable - ensures system recovery from lockup in safety-critical functions. |
Applications
| Appliance Control Panel | Industrial Sensor Node |
|---|---|
|
Use Scenario: Keypad-based temperature setpoint adjustment and display control in microwave ovens or HVAC controllers. IC Role / Device Role / Timing Role: Primary MCU managing KBI scan, LCD segment drive (via GPIO), and ADC reading of thermistor feedback. Use Value: Integrated KBI and 8-bit ADC eliminate external components, reducing BOM count by ≥3 ICs versus discrete solutions. |
Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and ambient light in factory settings. IC Role / Device Role / Timing Role: System controller executing timed sensor reads, data preprocessing, and UART transmission bursts. Use Value: STOP-mode current of 0.5 µA extends 2×AA battery life to >2 years at 1-minute sampling intervals. |
| Smart Power Outlet | Medical Device Front-End |
|
Use Scenario: AC outlet with energy monitoring, relay control, and LED status indicators for home automation systems. IC Role / Device Role / Timing Role: Safety-critical supervisor handling zero-cross detection (via IRQ), relay timing (TIM), and overvoltage shutdown (LVI). Use Value: LVI with 2.5 V trip point ensures clean reset before microcontroller logic fails under undervoltage stress. |
Use Scenario: Portable blood glucose meter requiring precise analog measurement and low-power standby between tests. IC Role / Device Role / Timing Role: ADC controller acquiring calibrated voltage from electrochemical test strip, with COP supervision for FDA compliance. Use Value: 8-bit ADC linearity error ≤±1 LSB meets ISO 15197:2013 accuracy requirements for Class II devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9RS08KA2CPD | RS08 core, 2 KB FLASH, no KBI, 10-bit ADC - higher resolution but lacks dedicated keyboard scan hardware. | Requires software-based key scanning; suitable for designs needing better ADC precision but fewer I/O lines. | Select when ADC resolution >8-bit is mandatory and KBI is not required. |
| MC68HC908JK3CP | HCS08 core, 3 KB FLASH, 128 B RAM, identical KBI/ADC/peripheral set - smaller memory and RAM footprint. | Matches peripheral compatibility but limits firmware size; appropriate for legacy code porting with tight memory constraints. | Select when existing JK3 firmware can be reused with minimal recompilation and memory headroom is <512 B. |
Compared with MC68HC908QY4VPE, MC9RS08KA2CPD trades KBI hardware for higher ADC resolution and lower active current, while MC68HC908JK3CP offers identical peripheral functionality at reduced memory capacity - both require firmware adaptation but share the same 16-pin SOIC footprint and I/O voltage tolerance.
Availability
MC68HC908QY4VPE is available at Aetrix Electronics and suitable for appliance control panels, industrial sensor nodes, and smart power outlets requiring stable component supply across multi-year production cycles.
Supply support for MC68HC908QY4VPE 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 leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with roots in Freescale's embedded controller heritage.
The MC68HC908QY/QT family was engineered for ultra-low-cost, low-pin-count embedded control - emphasizing integrated peripherals (KBI, LVI, AWU) to minimize external components in consumer and industrial human-interface applications.
FAQ
What is the maximum operating frequency of the MC68HC908QY4VPE?
The MC68HC908QY4VPE supports a maximum bus clock frequency of 8 MHz, achievable using either the internal trimmed RC oscillator or an external crystal. At 8 MHz, the instruction cycle time is 500 ns, enabling responsive real-time control in time-critical applications such as motor commutation or keypad debounce.
Does the MC68HC908QY4VPE include a hardware keyboard interrupt module?
Yes, the MC68HC908QY4VPE integrates a dedicated Keyboard Interrupt Module (KBI) that supports automatic scanning of up to 16 keys using Port A and Port B pins. This hardware accelerator reduces CPU load during keypress detection and enables wake-up from STOP mode upon key activity - a feature confirmed in Section 9 of the MC68HC908QY/QT Family Data Sheet, Rev. 6.
What are the low-power consumption specifications for the MC68HC908QY4VPE in STOP mode?
In STOP mode, the MC68HC908QY4VPE draws 0.5 µA typical current at 3.0 V and 25°C, as specified in Section 16.3 of the datasheet. This ultra-low quiescent current enables multi-year battery operation in intermittent-sensing applications, provided external circuitry (e.g., sensors, pull-ups) is also optimized for leakage.
Can the MC68HC908QY4VPE be programmed in-circuit after soldering?
Yes, the MC68HC908QY4VPE supports in-system programming (ISP) via its single-wire background debug interface (BDM). The on-chip 4 KB FLASH memory can be erased and reprogrammed using standard Freescale BDM tools without removing the device from the PCB - a capability documented in Chapter 15 of the MC68HC908QY/QT Family Data Sheet, Rev. 6.
What is the ADC resolution and conversion time of the MC68HC908QY4VPE?
The MC68HC908QY4VPE features an 8-bit successive-approximation ADC with 8 input channels and a typical conversion time of 25 µs. Its integral nonlinearity is ±1 LSB, and it operates across the full 2.7–5.5 V supply range - making it suitable for direct interfacing with resistive sensors and unamplified transducer outputs.
MC68HC908QY4VPE 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:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 128 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
MC68HC908QY4VPE FAQ
1.How can I place an order for MC68HC908QY4VPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC908QY4VPE 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 MC68HC908QY4VPE reliable?
The price and inventory of MC68HC908QY4VPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC908QY4VPE is usually 5 days.
3.What payment methods are accepted for MC68HC908QY4VPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC908QY4VPE transactions.
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4.How is shipping managed for MC68HC908QY4VPE?
MC68HC908QY4VPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC908QY4VPE 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 MC68HC908QY4VPE?
For technical support, including MC68HC908QY4VPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC908QY4VPE requirements.
6.How does Aetrix verify that MC68HC908QY4VPE is sourced from the original manufacturer or authorized distributors?
All MC68HC908QY4VPE 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 MC68HC908QY4VPE meets industry standards.
7.What is the process for return or replacement of MC68HC908QY4VPE?
All MC68HC908QY4VPE units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC908QY4VPE, 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 MC68HC908QY4VPE part is unused and in its original packaging.
Return procedure for MC68HC908QY4VPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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