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NXP Semiconductors MC68HC908QY2VPE
- Part No.:
- MC68HC908QY2VPE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MC68HC908QY2VPE.pdf
- Description:
- IC MCU 8BIT 1.5KB FLASH 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,898
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Product details
Overview
MC68HC908QY2VPE from NXP (formerly Freescale) is an 8-bit HCS08-core microcontroller with 2 KB FLASH, 128 B RAM, internal RC oscillator (4 MHz typical), 8-channel 8-bit ADC, and 16-pin SOIC package. It integrates COP watchdog, LVI reset protection, keyboard interrupt, and auto-wakeup for low-power sensor monitoring in battery-powered industrial controls.
For engineers reviewing the MC68HC908QY2VPE datasheet, MC68HC908QY2VPE pinout, MC68HC908QY2VPE application, or MC68HC908QY2VPE equivalent, key selection criteria include its 16-pin SOIC footprint, 2 KB flash endurance (10k erase/write cycles), internal oscillator trim capability, and support for WAIT/STOP low-power modes with wake-on-IRQ/KBI.
Technical Context
The MC68HC908QY2VPE 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 internal RC oscillator. Its memory map includes 2 KB on-chip FLASH (user-programmable, block-erasable), 128 B RAM, and dedicated I/O register space mapped to $00–$FF.
It features a System Integration Module (SIM) coordinating reset sources (power-on, LVI, COP timeout), clock generation (INTCLK, BUSCLKX2/X4), and interrupt routing (IRQ, KBI, ADC, TIM). The 8-channel ADC supports single-ended conversion with programmable sample time and interrupt-on-complete.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | M68HC08 8-bit CISC core with 16-bit addressing; executes instructions at up to 4 MHz bus clock. |
| FLASH Memory | 2 KB on-chip FLASH with 10,000 erase/write cycles; supports in-system programming via MON module. |
| RAM Size | 128 bytes of on-chip RAM; used for stack, variables, and temporary data storage during operation. |
| ADC Resolution | 8-bit successive-approximation ADC with 8 input channels; supports single-ended analog inputs up to VDD. |
| Oscillator | Internal RC oscillator trimmed to ±2% accuracy at 4 MHz (VDD = 5 V, TA = 25°C); no external crystal required. |
| Package | 16-pin SOIC (Small Outline Integrated Circuit); 300-mil body width, standard surface-mount footprint. |
| Supply Voltage | 4.5 V to 5.5 V operation; LVI circuit asserts reset below 4.25 V (typical) with hysteresis. |
Pinout & Package
MC68HC908QY2VPE is housed in a 16-pin SOIC package (case #751A-03), with 0.050" lead pitch and JEDEC MS-012AC outline. Pin functions are defined per shared priority table in Rev. 6 datasheet Section 1.6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 5 V supply pin; must be decoupled locally with 0.1 µF ceramic capacitor. |
| VSS | GND | Digital ground reference; connects to system PCB ground plane. |
| PTA0–PTA7 | Port A I/O | 8-bit bidirectional port; PTA0–PTA3 serve as ADC inputs when configured; PTA4 is OSC2/BUSCLKX4. |
| PTB0–PTB3 | Port B I/O | 4-bit bidirectional port; PTB0–PTB1 support IRQ/KBI functions; PTB2–PTB3 are general-purpose. |
| RESET | Active-low reset input | Asynchronous reset pin; driven low to force hardware reset; internal pull-up enabled. |
| IRQ | External interrupt request | Level-sensitive interrupt input (priority configurable); triggers IRQ vector on falling edge or low level. |
| KBI0–KBI3 | Keyboard interrupt inputs | Four dedicated pins supporting matrix keypad scanning with wake-from-STOP capability. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip FLASH with block protection | 2 KB user FLASH with FLBPR register enabling write/erase lock per 512-byte block-prevents accidental firmware corruption. |
| Internal oscillator trimming | OSCTRIM register allows software calibration of RC oscillator frequency to ±2% over temperature and voltage-eliminates need for external crystal in cost-sensitive designs. |
| Low-voltage inhibit (LVI) | Dedicated analog comparator asserts reset when VDD drops below 4.25 V (typ), with 100 mV hysteresis-ensures reliable operation during brown-out conditions. |
| Auto Wakeup Module (AWU) | Configurable 1–256 ms wakeup timer enables periodic sampling without CPU intervention-ideal for battery-powered sensor polling. |
| Computer Operating Properly (COP) | Watchdog timer with selectable timeout (0.5–16 ms) resets MCU if software fails to service COPCTL within window-critical for fail-safe embedded control. |
Applications
| Industrial Sensor Node | Smart Thermostat Control |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor node logging data every 30 seconds and transmitting via UART. IC Role / Device Role / Timing Role: Primary controller managing ADC sampling, sleep/wake scheduling, UART communication, and power management. Use Value: Internal RC oscillator + AWU enables precise 30 s wakeup intervals without external timing components; 2 KB FLASH stores firmware and calibration tables. | Use Scenario: Residential HVAC thermostat with keypad interface, display driver, and relay control logic. IC Role / Device Role / Timing Role: System-on-chip handling button scan (KBI), ambient sensing (ADC), display update timing, and relay actuation sequencing. Use Value: KBI0–KBI3 support 4×4 matrix keypad; LVI ensures safe shutdown during AC power dips; 16-pin SOIC fits compact front-panel PCB layout. |
| Legacy Appliance Controller | POS Peripheral Interface |
Use Scenario: Retrofit control board for washing machine motor timing, water valve actuation, and cycle status LED feedback. IC Role / Device Role / Timing Role: Real-time sequencer using TIM module for PWM-driven solenoid control and IRQ-triggered door switch detection. Use Value: IRQ pin supports immediate response to safety-critical door-open events; COP watchdog prevents hung states during spin cycles. | Use Scenario: Barcode scanner add-on module interfacing with main POS terminal via UART and decoding trigger signals. IC Role / Device Role / Timing Role: Dedicated decoder and interface bridge translating scanner output into ASCII serial stream with error-checking. Use Value: 8-bit ADC monitors battery voltage for low-power alert; 128 B RAM buffers decoded characters before transmission. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9RS08KA2CFKR | RS08 core, 2 KB FLASH, 128 B RAM, 16-pin QFN; lacks KBI but adds SPI/I²C; higher max clock (20 MHz). | Requires PCB redesign (QFN vs SOIC); better for comms-heavy designs but no native keypad scan support. | Select if serial peripheral integration outweighs legacy pin compatibility and KBI requirement. |
| STM8S003F3P6 | STM8 core, 8 KB FLASH, 1 KB RAM, 20-pin TSSOP; includes 10-bit ADC, USART, SPI, I²C; no internal RC trim. | Higher pin count and feature set; requires external clock or untrimmed RC; not drop-in due to different register map and toolchain. | Choose for enhanced peripherals and memory headroom where layout and firmware migration effort is acceptable. |
Compared with MC9RS08KA2CFKR and STM8S003F3P6, the MC68HC908QY2VPE offers proven KBI-driven keypad support and oscillator trim in a mature 16-pin SOIC package-making it optimal for cost-constrained, low-pin-count industrial controls where design stability and long-term supply are critical.
Availability
MC68HC908QY2VPE is available at Aetrix Electronics and suitable for industrial sensor nodes, smart thermostat controllers, and legacy appliance retrofits requiring stable component supply, long-lifecycle support, and mature toolchain compatibility.
Supply support for MC68HC908QY2VPE 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 delivering secure, scalable solutions for automotive, industrial, IoT, and communication infrastructure markets.
The MC68HC908QY2VPE belongs to the legacy HCS08 microcontroller family designed for cost-sensitive, low-power embedded control applications where reliability, small footprint, and minimal external components are essential.
FAQ
What is the maximum operating frequency of the MC68HC908QY2VPE?
The MC68HC908QY2VPE operates with a maximum bus clock frequency of 4 MHz, derived from its internal RC oscillator. This frequency is factory-trimmed and can be further calibrated via the OSCTRIM register to maintain ±2% accuracy across voltage and temperature ranges. External clock sources are not supported on this variant.
Does the MC68HC908QY2VPE support in-circuit programming?
Yes, the MC68HC908QY2VPE supports in-system programming via its Monitor (MON) module using a single-wire background debug interface. Programming requires the BDM-enabled debugger and compatible software (e.g., P&E Micro Cyclone PRO), and does not require high-voltage entry-enabling field firmware updates without removing the device from the PCB.
How many ADC channels does the MC68HC908QY2VPE have, and what is their resolution?
The MC68HC908QY2VPE integrates an 8-bit successive-approximation ADC with eight input channels (AD0–AD7), mapped to PTA0–PTA7. Each channel supports single-ended analog input referenced to VDD, with conversion times ranging from 25 to 50 µs depending on bus clock and prescaler settings.
What low-power modes are available on the MC68HC908QY2VPE?
The MC68HC908QY2VPE supports WAIT and STOP modes. In WAIT mode, the CPU halts while peripherals (ADC, TIM, KBI) remain active; in STOP mode, all clocks halt except the AWU timer, enabling wake-up via IRQ, KBI, or AWU timeout. Both modes reduce current consumption to under 10 µA (typ) at 5 V.
Is the MC68HC908QY2VPE pin-compatible with other members of the QY/QT family?
Yes, the MC68HC908QY2VPE shares identical pinout and electrical characteristics with MC68HC908QY1VPE and MC68HC908QY4VPE in the same 16-pin SOIC package. Differences lie solely in FLASH size (1 KB / 2 KB / 4 KB) and RAM (64 B / 128 B / 256 B), allowing direct substitution where memory requirements align.
MC68HC908QY2VPE 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:
- A/D 4x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
MC68HC908QY2VPE FAQ
1.How can I place an order for MC68HC908QY2VPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC68HC908QY2VPE 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 MC68HC908QY2VPE reliable?
The price and inventory of MC68HC908QY2VPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC68HC908QY2VPE is usually 5 days.
3.What payment methods are accepted for MC68HC908QY2VPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC68HC908QY2VPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC68HC908QY2VPE?
MC68HC908QY2VPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC68HC908QY2VPE 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 MC68HC908QY2VPE?
For technical support, including MC68HC908QY2VPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC68HC908QY2VPE requirements.
6.How does Aetrix verify that MC68HC908QY2VPE is sourced from the original manufacturer or authorized distributors?
All MC68HC908QY2VPE 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 MC68HC908QY2VPE meets industry standards.
7.What is the process for return or replacement of MC68HC908QY2VPE?
All MC68HC908QY2VPE units undergo pre-shipment inspection (PSI). If there is an issue with MC68HC908QY2VPE, 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 MC68HC908QY2VPE part is unused and in its original packaging.
Return procedure for MC68HC908QY2VPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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