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NXP Semiconductors MCHC908QT4CDWER
- Part No.:
- MCHC908QT4CDWER
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MCHC908QT4CDWER.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,557
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Product details
Overview
MCHC908QT4CDWER from NXP Semiconductors (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 operates at up to 8 MHz bus frequency using an internal trimmed RC oscillator and supports low-power Wait/Stop modes. Used in cost-sensitive industrial sensor nodes and appliance control panels requiring minimal external components.
For engineers reviewing the MCHC908QT4CDWER datasheet, MCHC908QT4CDWER pinout, MCHC908QT4CDWER application, or MCHC908QT4CDWER equivalent, key selection criteria include its 16-pin SOIC-W package, 5 V operation, COP watchdog, LVI reset protection, and keyboard interrupt capability for human-interface designs.
Technical Context
The MCHC908QT4CDWER implements the HCS08 CPU core with 16-bit address space, supporting indexed, extended, and relative addressing. Its memory map includes 4 KB FLASH (with block protection), 192 B RAM, and 32 B EEPROM-equivalent data storage via FLASH emulation.
Peripheral integration includes a 16-bit Timer Interface Module (TIM) with input capture/output compare, Auto Wakeup Module (AWU) for periodic wake-from-Stop, Low-Voltage Inhibit (LVI) with programmable trip point, and Keyboard Interrupt Module (KBI) supporting up to 8-key matrix scanning.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit CISC core with 16-bit address bus and 24-bit instruction set |
| FLASH Memory | 4 KB on-chip FLASH with page erase, mass erase, and block protection register |
| RAM Size | 192 bytes of on-chip RAM for stack, variables, and temporary data storage |
| ADC Resolution | 8-bit successive approximation ADC with 8 input channels and software-selectable clock prescaler |
| Operating Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V logic and legacy industrial power rails |
| Max Bus Frequency | 8 MHz - enables real-time response in motor control feedback loops and sensor sampling at ≤100 kHz |
| Package Type | 16-pin SOIC-W (Wide-body), 7.5 mm width - compatible with automated SMT placement and IPC Class 2 reflow profiles |
Pinout & Package
Package: 16-pin SOIC-W (Wide-body), case number 751BD-02, body width 7.5 mm, lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 5 V supply rail; decoupling capacitor required within 10 mm for stable ADC and oscillator operation |
| VSS | Ground | Digital ground reference; must be connected to system GND plane with low-inductance path |
| OSC1 / XTAL1 | Crystal input | Connects to one terminal of external 32.768 kHz or 1–8 MHz crystal; internal load capacitance 12 pF |
| OSC2 / XTAL2 | Crystal output | Drives crystal resonator; also functions as BUSCLKX4 output when internal oscillator selected |
| PTA0–PTA7 | Port A I/O | 8-bit bidirectional port with individual direction control; PTA0–PTA3 support KBI interrupt inputs |
| PTB0–PTB3 | Port B I/O | 4-bit bidirectional port; PTB0–PTB1 support TIM input capture and output compare functions |
| IRQ | External interrupt | Edge-triggered active-low interrupt input; supports MODE=0 (level-sensitive) or MODE=1 (edge-sensitive) |
| RESET | Reset input | Active-low asynchronous reset; internal pull-up enabled; accepts 5 V tolerant signal |
Key Features
| Feature | Design Value |
|---|---|
| Internal RC Oscillator | Trimmed 4.2 MHz ±2% internal oscillator eliminates need for external crystal in basic timing applications |
| Computer Operating Properly (COP) | Configurable watchdog timer with 16 selectable timeout intervals (0.5 ms to 1.0 s) prevents firmware lockup |
| Low-Voltage Inhibit (LVI) | Programmable reset threshold (4.25 V or 4.0 V) with hysteresis protects against brownout-induced corruption |
| Flash Block Protection | FLBPR register allows locking of top 256-byte or 512-byte FLASH block to prevent accidental overwrite of boot code |
| Keyboard Interrupt Module (KBI) | Hardware-accelerated 8-key matrix scan with auto-debounce and interrupt-on-change reduces CPU overhead by >90% |
Applications
| Industrial Sensor Node | Home Appliance Control Panel |
|---|---|
Use Scenario: Standalone temperature/humidity sensor node with LED status indicators and pushbutton interface. IC Role / Device Role / Timing Role: Main system controller executing sensor readout, local decision logic, and user feedback via GPIO and ADC. Use Value: Integrated 8-bit ADC and KBI eliminate external analog front-end and debounce IC, reducing BOM count by 3 components. |
Use Scenario: Microwave oven control board managing keypad input, display driver, relay sequencing, and safety interlocks. IC Role / Device Role / Timing Role: Primary MCU handling real-time cooking timer, door switch monitoring, and fault detection with LVI reset. Use Value: On-chip COP watchdog and programmable LVI ensure fail-safe shutdown during voltage sag or firmware hang. |
| Small-Motor Speed Controller | Legacy RS-232 Serial Adapter |
Use Scenario: Brushed DC fan controller with tachometer feedback, thermal cutoff, and manual speed adjustment. IC Role / Device Role / Timing Role: Real-time PWM generator and ADC-based current sensing node interfacing with host MCU via UART. Use Value: TIM module provides hardware PWM with dead-time insertion and input capture for precise RPM measurement. |
Use Scenario: Industrial serial-to-USB adapter converting legacy RS-232 signals to USB-CDC for PC connectivity. IC Role / Device Role / Timing Role: Protocol bridge MCU managing level translation, UART framing, and USB enumeration state machine. Use Value: 5 V tolerant I/O and internal oscillator enable direct connection to RS-232 transceivers without external clock source. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9RS08KA2CSC | RS08 core, 2 KB FLASH, no KBI, 10-pin TSSOP only | Lacks keyboard interrupt and has smaller memory - unsuitable for multi-button UIs | Select when footprint and cost are critical and UI is limited to single button or rotary encoder |
| MC9S08QG4CDTE | S08 core, 4 KB FLASH, 16-pin TSSOP, same peripheral set but no internal oscillator trim | Requires external crystal for accurate timing; lacks factory-trimmed RC oscillator | Choose when crystal-based timing stability is mandatory and PCB layout allows crystal placement |
Compared with MC9RS08KA2CSC and MC9S08QG4CDTE, the MCHC908QT4CDWER delivers factory-trimmed oscillator accuracy, integrated KBI, and SOIC-W packaging - making it optimal for space-constrained, cost-sensitive industrial controls where rapid time-to-market and minimal external components are essential.
Availability
MCHC908QT4CDWER is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control panels, and small-motor speed controllers requiring stable component supply across long production lifecycles.
Supply support for MCHC908QT4CDWER 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.
The MCHC908QT4CDWER belongs to the legacy HCS08 microcontroller family designed for cost-optimized, low-power embedded control in appliances, industrial equipment, and consumer electronics.
FAQ
What is the maximum operating frequency of the MCHC908QT4CDWER?
The MCHC908QT4CDWER supports a maximum bus frequency of 8 MHz. This is achieved using the internal trimmed RC oscillator or an external crystal up to 8 MHz. The CPU executes instructions at bus frequency, enabling deterministic timing for real-time control tasks such as PWM generation and ADC sampling at up to 100 kSPS.
Does the MCHC908QT4CDWER include a hardware watchdog timer?
Yes, the MCHC908QT4CDWER includes a Computer Operating Properly (COP) watchdog module. It offers 16 programmable timeout intervals ranging from 0.5 ms to 1.0 s, configurable via the COPCTL register. The COP resets the device if not serviced within the selected window, preventing system lockup due to software faults.
Can the MCHC908QT4CDWER operate without an external crystal?
Yes, the MCHC908QT4CDWER can operate without an external crystal. It features a factory-trimmed internal RC oscillator delivering 4.2 MHz ±2% accuracy - sufficient for UART communication, basic timing, and non-critical control loops. External crystals are optional for higher precision or frequencies above 4.2 MHz.
What is the purpose of the FLBPR register in the MCHC908QT4CDWER?
The FLASH Block Protect Register (FLBPR) in the MCHC908QT4CDWER enables hardware-level protection of the top 256-byte or 512-byte FLASH block. Once set, this protection prevents accidental erasure or programming of boot code or calibration constants, ensuring firmware integrity during field updates or debugging sessions.
How does the Keyboard Interrupt Module (KBI) function in the MCHC908QT4CDWER?
The KBI in the MCHC908QT4CDWER monitors up to eight input pins (PTA0–PTA7) for edge transitions and generates an interrupt on change. It includes hardware debounce timing and automatic pin-state latching, allowing the MCHC908QT4CDWER to detect keypresses with minimal CPU intervention and no external RC networks.
MCHC908QT4CDWER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Series:
- HC08
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- -
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 5
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MCHC908QT4CDWER FAQ
1.How can I place an order for MCHC908QT4CDWER through Aetrix?
Please submit a Request for Quotation (RFQ) for MCHC908QT4CDWER 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 MCHC908QT4CDWER reliable?
The price and inventory of MCHC908QT4CDWER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCHC908QT4CDWER is usually 5 days.
3.What payment methods are accepted for MCHC908QT4CDWER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCHC908QT4CDWER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCHC908QT4CDWER?
MCHC908QT4CDWER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCHC908QT4CDWER 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 MCHC908QT4CDWER?
For technical support, including MCHC908QT4CDWER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCHC908QT4CDWER requirements.
6.How does Aetrix verify that MCHC908QT4CDWER is sourced from the original manufacturer or authorized distributors?
All MCHC908QT4CDWER 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 MCHC908QT4CDWER meets industry standards.
7.What is the process for return or replacement of MCHC908QT4CDWER?
All MCHC908QT4CDWER units undergo pre-shipment inspection (PSI). If there is an issue with MCHC908QT4CDWER, 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 MCHC908QT4CDWER part is unused and in its original packaging.
Return procedure for MCHC908QT4CDWER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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