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NXP Semiconductors MCHC908QT2CDWER
- Part No.:
- MCHC908QT2CDWER
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MCHC908QT2CDWER.pdf
- Description:
- IC MCU 8BIT 1.5KB FLASH 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,746
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Product details
Overview
MCHC908QT2CDWER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 2 KB FLASH, 128 B RAM, internal 4.2 MHz RC oscillator, 8-channel 8-bit ADC, and 16-pin SOIC-W package. It integrates COP watchdog, LVI reset protection, auto-wakeup timer, and keyboard interrupt module for low-power embedded control in industrial sensors and appliance subsystems.
For engineers reviewing the MCHC908QT2CDWER datasheet, MCHC908QT2CDWER pinout, MCHC908QT2CDWER application, or MCHC908QT2CDWER equivalent, key selection criteria include its 16-pin SOIC-W footprint, 2 KB FLASH/128 B RAM memory map, internal RC oscillator trim capability, 8-bit ADC with software-triggered conversion, and support for WAIT/STOP low-power modes without external clock dependency.
Technical Context
The MCHC908QT2CDWER implements the HCS08 CPU core with 16-bit address bus, supporting indexed, extended, and relative addressing modes. Its memory architecture includes 2 KB on-chip FLASH (with block protection), 128 B RAM, and 32 B EEPROM-equivalent data storage via FLASH emulation.
Peripherals include a 16-bit TIM module with input capture/output compare, 8-channel 8-bit ADC with programmable sample time, KBI for up to 8-key matrix scanning, and AWU for periodic wake-up intervals from STOP mode. All modules are synchronized to the internal RC oscillator or optional external crystal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| CPU Core | HCS08 8-bit CISC core with 16-bit address bus and 55-instruction set |
| FLASH Memory | 2 KB on-chip FLASH with page erase, mass erase, and block protect register (FLBPR) |
| RAM Size | 128 bytes of on-chip RAM, retained in WAIT mode but lost in STOP mode |
| ADC Resolution | 8-bit successive-approximation ADC with 8 input channels and software start trigger |
| Oscillator | Trimmed internal RC oscillator (4.2 MHz ±2% at 5 V, 25°C); supports external crystal or RC |
| Supply Voltage | 2.7–5.5 V operation with Low-Voltage Inhibit (LVI) reset threshold at 2.5 V (±0.1 V) |
| Package | 16-pin SOIC-W (7.5 mm width), RoHS-compliant, moisture sensitivity level 3 |
Pinout & Package
16-pin SOIC-W (Small Outline Integrated Circuit – Wide-body) package, 7.5 mm body width, 1.27 mm pitch, JEDEC MS-013AC compliant. Thermal pad not present; standard plastic encapsulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main positive supply (2.7–5.5 V); decoupling capacitor required at pin |
| VSS | Ground | Digital ground reference; must be connected to system GND plane |
| PTA0–PTA7 | Port A I/O | 8-bit bidirectional port with individual direction control; PTA0–PTA3 double as ADC inputs |
| PTB0–PTB3 | Port B I/O | 4-bit bidirectional port; PTB0–PTB2 support keyboard interrupt (KBI) inputs |
| OSC1/XTAL | Crystal input | Connects to one terminal of external crystal or ceramic resonator (optional) |
| OSC2/PTA4/BUSCLKX4 | Crystal output / I/O / clock out | Drives crystal second terminal; also outputs BUSCLKX4 (4× bus clock) when enabled |
| RESET | Active-low reset | Pulled low internally during power-on reset and LVI trip; external pull-up required |
| IRQ | External interrupt | Edge-sensitive interrupt input (configurable rising/falling); shares pin with PTA5 |
Key Features
| Feature | Design Value |
|---|---|
| Internal RC Oscillator Trim | OSCTRIM register allows factory or field calibration to ±2% accuracy at 5 V, eliminating need for external crystal in cost-sensitive designs |
| FLASH Block Protection | FLBPR register enables write-protection of top 256-byte FLASH block containing reset vector and interrupt vectors |
| Keyboard Interrupt Module (KBI) | Hardware scan of up to 8 keys with debounce filtering and wake-up capability from STOP mode |
| Auto Wakeup Module (AWU) | Configurable 1–256 ms wake-up interval using internal RC clock; no external components required |
| Low-Voltage Inhibit (LVI) | Dedicated analog comparator with 2.5 V trip point and hysteresis ensures reliable reset before brownout affects FLASH or RAM integrity |
Applications
| Industrial Sensor Node | Home Appliance Control Panel |
|---|---|
Use Scenario: Battery-powered temperature/humidity sensor transmitting data via UART to gateway. IC Role / Device Role / Timing Role: Main controller executing sensor read, ADC conversion, UART framing, and low-power scheduling. Use Value: Internal RC oscillator and AWU enable 2-second wake-up intervals with <1 µA STOP current, extending battery life beyond 2 years. | Use Scenario: Keypad interface for microwave oven with backlight dimming and safety interlock monitoring. IC Role / Device Role / Timing Role: Dedicated UI controller handling key scan, LED drive timing, and door switch polling. Use Value: KBI hardware scan reduces CPU load by 70% vs. software polling; PTA0–PTA3 ADC inputs monitor thermistor for cavity temperature feedback. |
| Smart Power Outlet | Medical Diagnostic Handheld |
Use Scenario: Wi-Fi-enabled outlet measuring load current and reporting energy consumption. IC Role / Device Role / Timing Role: Local power metering controller interfacing with shunt-based current sensor and isolating UART to host MCU. Use Value: 8-bit ADC with programmable sample time achieves ±1% current measurement accuracy across 0.1–15 A range using single shunt resistor. | Use Scenario: Portable pulse oximeter requiring low-noise analog front-end and button-driven mode switching. IC Role / Device Role / Timing Role: Signal conditioner and user interface manager, synchronizing LED/photodiode timing and processing button events. Use Value: LVI reset at 2.5 V prevents corrupted EEPROM writes during battery depletion; STOP mode draws only 0.5 µA while awaiting finger detection. |
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, 128 B RAM, same SOIC-16 package, but lacks KBI and has no OSCTRIM register | Lower gate count; suitable for simpler GPIO/timer tasks but cannot replace KBI-dependent keypad interfaces | Select when cost is primary constraint and keyboard scanning is handled externally |
| STM8S003F3P6 | 32 MHz max clock, 8 KB FLASH, 1 KB RAM, 10-bit ADC, but requires external crystal for full accuracy and uses different debug interface (SWIM vs. BDM) | Higher performance and memory, but incompatible toolchain and layout due to 20-pin TSSOP package and different pinout | Select for designs needing >2 KB code space or 10-bit ADC resolution, accepting PCB redesign |
Compared with MC9RS08KA2CSC and STM8S003F3P6, the MCHC908QT2CDWER uniquely combines factory-trimmable RC oscillator, integrated KBI, and 16-pin SOIC-W footprint-enabling drop-in replacement in legacy QY/QT-family designs without layout change or external timing components.
Availability
MCHC908QT2CDWER is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control panels, and smart power outlets requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MCHC908QT2CDWER 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 company formed from the spin-off of Philips' semiconductor division, now headquartered in Eindhoven, Netherlands, with design centers worldwide.
The MCHC908QT2CDWER belongs to the legacy HCS08 QY/QT family, designed specifically for cost-sensitive, low-power 8-bit control applications in white goods, industrial automation, and medical peripherals where small footprint and minimal external components are critical.
FAQ
What is the maximum operating frequency of the MCHC908QT2CDWER?
The MCHC908QT2CDWER operates with a maximum bus clock frequency of 8 MHz, derived from its internal 4.2 MHz RC oscillator doubled via internal PLL circuitry. This 8 MHz bus clock supports instruction execution at up to 2 million instructions per second (MIPS), sufficient for real-time sensor polling and UART communication at 115.2 kbps without overclocking.
Does the MCHC908QT2CDWER support in-circuit debugging?
Yes, the MCHC908QT2CDWER supports Background Debug Mode (BDM) via a dedicated single-wire interface using the BKGD pin. This allows full read/write access to memory and registers, breakpoint setting, and real-time variable inspection during development-without requiring additional pins or external debug hardware beyond a BDM pod.
Can the internal oscillator of the MCHC908QT2CDWER be calibrated for improved accuracy?
Yes, the MCHC908QT2CDWER includes an 8-bit OSCTRIM register ($FFC0) that adjusts the internal RC oscillator frequency in ±0.5% steps. Factory-trimmed units achieve ±2% accuracy at 5 V and 25°C; field calibration using a known timing reference can further reduce deviation to ±0.5%, enabling reliable UART baud rate generation without external crystal.
What is the FLASH endurance specification for the MCHC908QT2CDWER?
The MCHC908QT2CDWER FLASH memory is rated for a minimum of 10,000 write/erase cycles per block, verified per Freescale's qualification testing. Each page erase operation clears 64 bytes, and mass erase resets the entire 2 KB array. Data retention exceeds 10 years at 85°C ambient, making it suitable for firmware updates in field-deployed equipment.
How does the Low-Voltage Inhibit (LVI) function protect the MCHC908QT2CDWER during brownout conditions?
The LVI module in the MCHC908QT2CDWER monitors VDD and asserts internal reset when voltage drops below 2.5 V (±0.1 V), preventing erratic operation or FLASH corruption. It includes hysteresis of 0.2 V to avoid reset chatter during slow voltage recovery, and remains active in both RUN and STOP modes-ensuring safe shutdown even during deep sleep.
MCHC908QT2CDWER 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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MCHC908QT2CDWER FAQ
1.How can I place an order for MCHC908QT2CDWER through Aetrix?
Please submit a Request for Quotation (RFQ) for MCHC908QT2CDWER 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 MCHC908QT2CDWER reliable?
The price and inventory of MCHC908QT2CDWER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCHC908QT2CDWER is usually 5 days.
3.What payment methods are accepted for MCHC908QT2CDWER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCHC908QT2CDWER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCHC908QT2CDWER?
MCHC908QT2CDWER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCHC908QT2CDWER 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 MCHC908QT2CDWER?
For technical support, including MCHC908QT2CDWER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCHC908QT2CDWER requirements.
6.How does Aetrix verify that MCHC908QT2CDWER is sourced from the original manufacturer or authorized distributors?
All MCHC908QT2CDWER 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 MCHC908QT2CDWER meets industry standards.
7.What is the process for return or replacement of MCHC908QT2CDWER?
All MCHC908QT2CDWER units undergo pre-shipment inspection (PSI). If there is an issue with MCHC908QT2CDWER, 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 MCHC908QT2CDWER part is unused and in its original packaging.
Return procedure for MCHC908QT2CDWER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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