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NXP Semiconductors MCHC908QY4VDWE
- Part No.:
- MCHC908QY4VDWE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MCHC908QY4VDWE.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,364
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Product details
Overview
MCHC908QY4VDWE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 4 KB Flash, 192 B RAM, internal 32 MHz RC oscillator, 8-channel 10-bit ADC, and 16-pin SOIC package. It integrates COP watchdog, LVI reset protection, keyboard interrupt, and auto-wakeup for low-power sensor interface and industrial control applications.
For engineers reviewing the MCHC908QY4VDWE datasheet, MCHC908QY4VDWE pinout, MCHC908QY4VDWE application, or MCHC908QY4VDWE equivalent, key selection factors include its 16-pin SOIC footprint, 3.3–5.5 V operation, on-chip oscillator trim register (OSCTRIM), IRQ/KBI interrupt architecture, and Flash block protection register (FLBPR) for firmware security.
Technical Context
The MCHC908QY4VDWE implements the HCS08 CPU core with 16-bit address bus, supporting WAIT/STOP low-power modes and a 16-level hardware stack. Its oscillator module provides selectable clock sources: internal RC (±2% typical after trim), external crystal (up to 8 MHz), or RC network, with BUSCLKX2/BUSCLKX4 outputs for peripheral timing.
Memory organization includes 4 KB of on-chip SuperFlash® with page-erase capability, 192 B RAM, and dedicated I/O register space mapped at $0000–$00FF and $FF00–$FFFF. The ADC supports single-ended conversion with programmable sample time and interrupt-on-complete functionality.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 16-bit address bus and 16-level hardware stack |
| Flash Memory | 4 KB SuperFlash® with page erase, mass erase, and block protection (FLBPR) |
| RAM Size | 192 bytes for data storage and stack operations |
| ADC Resolution | 10-bit successive approximation with 8 input channels and software-triggered conversion |
| Operating Voltage | 3.3 V to 5.5 V - supports direct interface with legacy 5 V logic and modern 3.3 V peripherals |
| Internal Oscillator | RC-based, factory-trimmed to ±2% at 32 MHz; OSCTRIM register enables field calibration |
| Package | 16-pin SOIC (300 mil width), RoHS-compliant, JEDEC MS-012AC |
Pinout & Package
Package: 16-pin Small Outline Integrated Circuit (SOIC), 300 mil body width, 1.27 mm pitch, JEDEC MS-012AC outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main positive supply rail (3.3–5.5 V); decoupling capacitor required at pin |
| VSS | Ground | Digital ground reference; must be connected to system GND plane |
| PTA0–PTA7 | Port A bidirectional I/O | 8-bit general-purpose port with individual direction control (DDRA); PTA0–PTA3 support KBI inputs |
| PTB0–PTB3 | Port B bidirectional I/O | 4-bit general-purpose port; PTB0–PTB1 support IRQ inputs with configurable polarity |
| OSC1/XTAL1 | Crystal amplifier input | Connects to one terminal of external crystal or ceramic resonator (1–8 MHz) |
| OSC2/PTA4/BUSCLKX4 | Crystal amplifier output / I/O / clock output | Drives crystal; also functions as general I/O or outputs 2×/4× bus clock for timing verification |
| RESET | Active-low reset input | Asynchronous reset trigger; internally pulled up; accepts external pushbutton or supervisor IC |
| IRQ | External interrupt request | Edge-sensitive (rising/falling configurable via MODE bit); highest-priority non-maskable interrupt source |
Key Features
| Feature | Design Value |
|---|---|
| On-chip oscillator trimming | OSCTRIM register allows field calibration of internal RC oscillator to maintain timing accuracy across voltage/temperature |
| Flash block protection | FLBPR register enables write-protection of top/bottom 512-byte Flash blocks to prevent accidental firmware overwrite |
| Keyboard interrupt (KBI) | Hardware scan of up to 8 keys via PTA0–PTA3 with wake-from-WAIT/STOP capability and debounce filtering |
| Low-voltage inhibit (LVI) | Configurable trip point (2.5 V or 3.8 V) with hysteresis prevents erratic operation during brownout conditions |
| COP watchdog timer | Programmable timeout (0.5 ms to 1.0 s) with independent clock source ensures recovery from software lockup |
Applications
| Industrial Sensor Node | Smart Appliance Control |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor node in HVAC duct monitoring. IC Role / Device Role / Timing Role: Main controller executing sensor polling, ADC sampling, and UART telemetry transmission. Use Value: Auto-wakeup from STOP mode on timer or KBI event extends battery life beyond 5 years with CR2032 cell. | Use Scenario: Front-panel keypad and display management in microwave oven or washing machine. IC Role / Device Role / Timing Role: Dedicated UI controller handling key scan, LED backlight PWM, and buzzer tone generation. Use Value: Integrated KBI and 10-bit ADC eliminate external key decoder IC and reduce BOM count by two components. |
| Legacy Equipment Retrofit | Programmable Power Supply Monitor |
Use Scenario: Replacement MCU in discontinued industrial PLC I/O modules requiring 5 V TTL compatibility. IC Role / Device Role / Timing Role: Drop-in functional replacement for MC68HC908QY2/QY4 with identical pinout and memory map. Use Value: Pin-compatible SOIC-16 footprint and identical register layout enable PCB reuse without layout revision. | Use Scenario: Real-time monitoring of +12 V and +5 V rails in telecom power shelf with fault logging. IC Role / Device Role / Timing Role: Standalone monitor capturing overvoltage/undervoltage events and storing timestamps in Flash. Use Value: LVI module with dual trip points and nonvolatile Flash allow autonomous fault capture without host processor intervention. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9RS08KA2CPD | RS08 core, 2 KB Flash, no KBI, 8-pin SOIC; lower cost but lacks keyboard interrupt and IRQ priority control | Suitable only for simple I/O control without matrix keypad support | Select when KBI and IRQ flexibility are unnecessary and board space is constrained |
| MC9S08QG4CDTE | HCS08 core, 4 KB Flash, 16-pin TSSOP, same peripheral set but no internal oscillator trim register (OSCTRIM) | Requires external crystal for precise timing; less suitable for cost-sensitive crystal-free designs | Select when crystal-based timing is preferred and TSSOP packaging is acceptable |
Compared with MC9RS08KA2CPD and MC9S08QG4CDTE, the MCHC908QY4VDWE uniquely combines factory-trimmed RC oscillator, KBI hardware scanning, and FLBPR-based Flash protection in a legacy-compatible SOIC-16 package-making it optimal for retrofit and low-power human-interface designs where timing autonomy and firmware security are critical.
Availability
MCHC908QY4VDWE is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control panels, and legacy equipment retrofit projects requiring stable component supply and long-term manufacturing continuity.
Supply support for MCHC908QY4VDWE 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The MCHC908QY4VDWE belongs to the legacy HCS08 microcontroller family, designed for cost-sensitive, low-power embedded control in industrial automation, consumer appliances, and infrastructure equipment where reliability and long-term supply stability are essential.
FAQ
What is the maximum operating frequency of the MCHC908QY4VDWE internal oscillator?
The MCHC908QY4VDWE features an internal RC oscillator rated up to 32 MHz. After factory trimming, typical accuracy is ±2% across the full operating voltage (3.3–5.5 V) and temperature (–40°C to +85°C) range. The OSCTRIM register allows further field calibration to compensate for unit-to-unit variation or aging effects.
Does the MCHC908QY4VDWE support in-circuit programming via standard interfaces?
Yes, the MCHC908QY4VDWE supports in-circuit programming using the Background Debug Mode (BDM) interface through a single-wire connection. This enables flash programming, debugging, and real-time register inspection without removing the device from the target board. No external bootloader code is required.
How many interrupt sources does the MCHC908QY4VDWE support, and what is their priority order?
The MCHC908QY4VDWE supports eight interrupt sources: IRQ, KBI, ADC, TIM, COP, LVI, RESET, and SWI. Priority is fixed in hardware, with RESET highest and SWI lowest. IRQ and KBI are edge-triggered and can wake the device from WAIT/STOP modes, while TIM and ADC interrupts are level-sensitive and require software acknowledgment.
Can the MCHC908QY4VDWE operate reliably at 3.3 V supply voltage?
Yes, the MCHC908QY4VDWE is fully specified for operation from 3.3 V to 5.5 V. At 3.3 V, the internal oscillator maintains ≥24 MHz operation, and all I/O pins remain 5 V tolerant-enabling safe interfacing with both 3.3 V logic and legacy 5 V peripherals without level shifters.
What debug and development tools are officially supported for the MCHC908QY4VDWE?
NXP officially supports the MCHC908QY4VDWE with the DEMO9S08QG8 evaluation board, CodeWarrior Development Studio for HCS08, and the P&E Micro USB-ML-BDM debugger. These tools provide full BDM-based flash programming, real-time variable watch, and hardware breakpoint support compatible with the MCHC908QY4VDWE's on-chip debug module.
MCHC908QY4VDWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 16-SOIC (0.295", 7.50mm 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:
- 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:
- Surface Mount
- Supplier Device Package:
MCHC908QY4VDWE FAQ
1.How can I place an order for MCHC908QY4VDWE through Aetrix?
Please submit a Request for Quotation (RFQ) for MCHC908QY4VDWE 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 MCHC908QY4VDWE reliable?
The price and inventory of MCHC908QY4VDWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCHC908QY4VDWE is usually 5 days.
3.What payment methods are accepted for MCHC908QY4VDWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCHC908QY4VDWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCHC908QY4VDWE?
MCHC908QY4VDWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCHC908QY4VDWE 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 MCHC908QY4VDWE?
For technical support, including MCHC908QY4VDWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCHC908QY4VDWE requirements.
6.How does Aetrix verify that MCHC908QY4VDWE is sourced from the original manufacturer or authorized distributors?
All MCHC908QY4VDWE 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 MCHC908QY4VDWE meets industry standards.
7.What is the process for return or replacement of MCHC908QY4VDWE?
All MCHC908QY4VDWE units undergo pre-shipment inspection (PSI). If there is an issue with MCHC908QY4VDWE, 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 MCHC908QY4VDWE part is unused and in its original packaging.
Return procedure for MCHC908QY4VDWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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