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NXP Semiconductors MCHC908QT4MDWE
- Part No.:
- MCHC908QT4MDWE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 8-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
MCHC908QT4MDWE.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:3,108
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Product details
Overview
MCHC908QT4MDWE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 4 KB 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 or external crystal, and targets low-cost embedded control in space-constrained applications such as appliance motor interfaces and sensor signal conditioning.
For engineers reviewing the MCHC908QT4MDWE datasheet, MCHC908QT4MDWE pinout, MCHC908QT4MDWE application, or MCHC908QT4MDWE equivalent, key selection criteria include its 16-pin SOIC-W package, on-chip COP watchdog, LVI brownout protection, keyboard interrupt capability, and support for WAIT/STOP low-power modes - all confirmed in the MC68HC908QY/QT Family Data Sheet, Rev. 6.
Technical Context
The MCHC908QT4MDWE implements the HCS08 CPU core with 16-bit address space, supporting indexed, extended, and relative addressing. Its memory map includes 4 KB of on-chip Flash (with block protection), 192 B RAM, and 32 B EEPROM-equivalent data storage via Flash emulation.
Peripherals include an 8-channel 8-bit ADC with programmable conversion clock prescaler, a 16-bit Timer Interface Module (TIM) with input capture/output compare, a Keyboard Interrupt Module (KBI) supporting up to 8 keys, and a Low-Voltage Inhibit (LVI) circuit with selectable trip points (2.5 V or 3.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 16-bit address bus and 32-instruction pipeline |
| Flash Memory | 4 KB on-chip Flash with page erase, mass erase, and block protection register |
| RAM Size | 192 bytes of on-chip RAM, mapped at $0080–$013F |
| ADC Resolution | 8-bit successive-approximation ADC with 8 selectable input channels |
| Max Bus Frequency | 8 MHz derived from internal 32 MHz RC oscillator (divided by 4) or external source |
| Operating Voltage | 2.7–5.5 V supply range, compatible with industrial and consumer voltage rails |
| Low-Power Modes | WAIT mode (CPU halted, peripherals active) and STOP mode (full clock gating, 1 µA typical) |
Pinout & Package
Package: 16-pin SOIC-W (Wide-body), 300 mil width, JEDEC MS-013AC, body size 10.3 × 7.5 mm, lead pitch 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main positive supply rail (2.7–5.5 V); decoupling capacitor required at pin |
| VSS | Ground | Digital ground reference; must be connected to system GND plane |
| OSC1 | Crystal input | Input to internal crystal amplifier; used only with external XTAL configuration |
| OSC2/PTA4/BUSCLKX4 | Crystal output / Port A bit 4 / Clock output | Drives external crystal; also serves as general-purpose I/O or outputs 4× bus clock |
| PTA0–PTA7 | Port A bidirectional I/O | 8-bit port with individual direction control; PTA0–PTA3 support KBI; PTA4 is shared with OSC2 |
| PTB0–PTB3 | Port B bidirectional I/O | 4-bit port; PTB0–PTB2 support IRQ and TIM functions; PTB3 is dedicated IRQ input |
| RESET | Active-low reset input | Asynchronous reset assertion; internal pull-up enabled; supports external reset button or supervisor IC |
| IRQ | External interrupt request | Edge-triggered (rising/falling configurable) interrupt input; highest priority external interrupt source |
Key Features
| Feature | Design Value |
|---|---|
| On-chip COP watchdog | Configurable timeout (0.5 ms to 1.0 s) with software disable and windowed operation support |
| Internal oscillator trimming | Factory-trimmed RC oscillator with ±2% accuracy over temperature; OSCTRIM register allows field calibration |
| Keyboard interrupt (KBI) | Hardware scan of up to 8 keys with debounce filtering and wake-from-STOP capability |
| Flash memory protection | FLBPR register enables per-block write/erase lock; prevents accidental firmware overwrite during field updates |
| LVI brownout detection | Selectable 2.5 V or 3.0 V trip point with hysteresis; generates reset or interrupt on undervoltage condition |
Applications
| Home Appliance Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Microcontroller in washing machine control board managing motor drive sequencing, water level sensing, and user interface inputs. IC Role / Device Role / Timing Role: Primary system controller executing real-time state machine logic, reading analog pressure/temperature sensors via ADC, and scanning membrane keypad via KBI. Use Value: Integrated 8-bit ADC and KBI eliminate need for external interface ICs; 4 KB Flash accommodates feature-rich firmware with diagnostics and calibration tables. | Use Scenario: Compact environmental monitor measuring temperature, humidity, and CO₂ levels in HVAC ducts or factory floors. IC Role / Device Role / Timing Role: Signal acquisition node converting analog sensor outputs to digital values, applying linearization, and transmitting via UART or I²C to host MCU. Use Value: 2.7–5.5 V operation ensures compatibility with 3.3 V and 5 V sensor front-ends; STOP mode enables battery-powered operation with <1 µA sleep current. |
| Consumer Electronics Remote | Motor Drive Feedback Controller |
Use Scenario: IR remote control unit with multi-function buttons, LED indicators, and low-battery warning. IC Role / Device Role / Timing Role: Input processor scanning mechanical or capacitive keys, encoding commands, and driving IR LED via GPIO-controlled transistor. Use Value: KBI hardware reduces CPU load during key polling; LVI interrupt triggers low-battery alert before system failure. | Use Scenario: Brushless DC motor commutation feedback module monitoring hall-effect sensor signals and adjusting timing based on rotor position. IC Role / Device Role / Timing Role: Real-time position decoder using TIM input capture to measure hall sensor edge intervals and compute RPM. Use Value: 16-bit TIM with input capture provides sub-microsecond timing resolution; 8 MHz bus speed ensures deterministic response to fast-changing rotor positions. |
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, lower max frequency (10 MHz bus but 2.5 MHz effective), no LVI interrupt mode | Lacks hardware keyboard scan and configurable LVI interrupt; suitable only for simpler I/O tasks without key matrix or precise brownout response | Select when cost sensitivity outweighs KBI/LVI requirements and firmware fits within 2 KB Flash |
| STM8S003F3P6 | STM8 core, 8 KB Flash, 1 KB RAM, 10-bit ADC, no KBI, integrated EEPROM, higher peripheral integration | Superior memory and ADC resolution but requires external debounce logic for keypads; lacks native KBI wake-from-STOP | Prefer for designs needing larger code space, EEPROM persistence, or higher ADC precision - accept added external components for keypad handling |
Compared with MC9RS08KA2CSC and STM8S003F3P6, the MCHC908QT4MDWE delivers optimal balance of integrated KBI, LVI interrupt capability, and Flash size for cost-sensitive, space-constrained control nodes where keypad interaction and robust undervoltage response are mandatory.
Availability
MCHC908QT4MDWE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor interface, and consumer electronics remote applications requiring stable component supply across long production lifecycles.
Supply support for MCHC908QT4MDWE 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 specializing in secure connectivity solutions for automotive, industrial, and IoT markets.
The MCHC908QT4MDWE belongs to the legacy HC08 family, designed specifically for cost-optimized, low-pin-count embedded control in resource-constrained environments where reliability, integrated analog peripherals, and ultra-low-power operation are critical.
FAQ
What is the maximum operating frequency of the MCHC908QT4MDWE?
The MCHC908QT4MDWE supports a maximum bus clock frequency of 8 MHz. This is achieved either by dividing the internal 32 MHz RC oscillator by 4 or by using an external crystal source. The CPU executes instructions at bus clock speed, enabling deterministic real-time response in time-critical control loops. All timing specifications in the MC68HC908QY/QT Family Data Sheet, Rev. 6 assume this 8 MHz maximum.
Does the MCHC908QT4MDWE support in-system programming (ISP)?
Yes, the MCHC908QT4MDWE supports in-system programming via its on-chip background debug mode (BDM) interface using a standard Freescale BDM pod or compatible debugger. Flash memory can be reprogrammed without removing the device from the PCB, and the CONFIG1 register allows disabling BDM protection after final firmware lock. This capability is documented in Chapter 15 of the MC68HC908QY/QT Family Data Sheet, Rev. 6.
How many I/O pins does the MCHC908QT4MDWE provide in its 16-pin SOIC-W package?
The MCHC908QT4MDWE provides 12 usable I/O pins in its 16-pin SOIC-W package: Port A (PTA0–PTA7) offers 8 pins, and Port B (PTB0–PTB3) adds 4 more. Pins VDD, VSS, RESET, and OSC1 are dedicated power, reset, and oscillator functions and are not general-purpose I/O. Pin OSC2/PTA4 is multiplexed but counts as one I/O when configured as PTA4.
Can the MCHC908QT4MDWE wake from STOP mode using a keyboard interrupt?
Yes, the MCHC908QT4MDWE can wake from STOP mode using the Keyboard Interrupt Module (KBI). When enabled, KBI detects transitions on PTA0–PTA3 and asserts the IRQ line, causing exit from STOP mode and resumption of program execution. This behavior is explicitly supported per Section 9.4 and Table 13-3 (Interrupt Sources) in the MC68HC908QY/QT Family Data Sheet, Rev. 6.
What oscillator options are available for the MCHC908QT4MDWE?
The MCHC908QT4MDWE supports three oscillator configurations: (1) internal trimmed RC oscillator (default, ~32 MHz, divided to 8 MHz bus), (2) external crystal (XTAL) connected between OSC1 and OSC2, and (3) external RC network on OSC1. Configuration is controlled by bits in CONFIG1 and CONFIG2 registers. All options are fully detailed in Chapter 11 of the MC68HC908QY/QT Family Data Sheet, Rev. 6.
MCHC908QT4MDWE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 8-SOIC (0.209", 5.30mm Width)
- Series:
- HC08
- Packaging:
- Bulk
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MCHC908QT4MDWE FAQ
1.How can I place an order for MCHC908QT4MDWE through Aetrix?
Please submit a Request for Quotation (RFQ) for MCHC908QT4MDWE 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 MCHC908QT4MDWE reliable?
The price and inventory of MCHC908QT4MDWE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCHC908QT4MDWE is usually 5 days.
3.What payment methods are accepted for MCHC908QT4MDWE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCHC908QT4MDWE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCHC908QT4MDWE?
MCHC908QT4MDWE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCHC908QT4MDWE 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 MCHC908QT4MDWE?
For technical support, including MCHC908QT4MDWE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCHC908QT4MDWE requirements.
6.How does Aetrix verify that MCHC908QT4MDWE is sourced from the original manufacturer or authorized distributors?
All MCHC908QT4MDWE 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 MCHC908QT4MDWE meets industry standards.
7.What is the process for return or replacement of MCHC908QT4MDWE?
All MCHC908QT4MDWE units undergo pre-shipment inspection (PSI). If there is an issue with MCHC908QT4MDWE, 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 MCHC908QT4MDWE part is unused and in its original packaging.
Return procedure for MCHC908QT4MDWE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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