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NXP Semiconductors MC908QC16CDZE
- Part No.:
- MC908QC16CDZE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 28-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MC908QC16CDZE.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,026
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Product details
Overview
MC908QC16CDZE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 16 KB on-chip FLASH, 512 B RAM, and integrated ADC10, ESCI, SPI, TIM1/TIM2, KBI, and COP watchdog. It operates at up to 8 MHz bus frequency, supports 2.7–5.5 V supply, and targets embedded control in industrial sensors and appliance motor interfaces.
For engineers reviewing the MC908QC16CDZE datasheet, MC908QC16CDZE pinout, MC908QC16CDZE application, or MC908QC16CDZE equivalent, key selection criteria include its 28-pin TSSOP package, FLASH security byte validation ($FFF6–$FFFD), 10-bit ADC with 8-channel analog input, and dual low-power stop/wait modes with LVI reset protection.
Technical Context
The MC908QC16CDZE implements the HCS08 CPU core with 16 MB linear address space, 8-level hardware stack, and 72-instruction set optimized for C compilation. Its memory map includes 16 KB FLASH (with block protection and EEPROM emulation), 512 B RAM, and 64 B EEPROM-like configuration registers.
Peripherals are managed via the System Integration Module (SIM), supporting clock gating, reset sources (power-on, LVI, COP, external IRQ), and interrupt prioritization across 16 vectors. The enhanced serial communications interface (ESCI) provides asynchronous full-duplex UART operation with programmable baud rate generation tied to BUSCLKX4.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 16 MB address space and 8-level hardware stack - enables compact code footprint and deterministic real-time response. |
| FLASH Memory | 16 KB on-chip FLASH with page/mass erase, block protection, and EEPROM emulation - supports field firmware updates and parameter storage without external NV memory. |
| ADC Resolution | 10-bit successive-approximation ADC with 8 selectable input channels and internal voltage reference - delivers ±1 LSB INL for precision sensor signal digitization. |
| Supply Voltage Range | 2.7 V to 5.5 V - allows direct interface with 3.3 V logic or legacy 5 V systems without level-shifting. |
| Bus Frequency | Up to 8 MHz - sets maximum instruction throughput and peripheral timing margins for real-time control loops. |
| Security Mechanism | 8-byte FLASH read protection requiring match of $FFF6–$FFFD during monitor mode entry; denies access if ≥5 bytes are zero - prevents unauthorized firmware extraction during debug. |
| Low-Voltage Reset | LVI trip point at 2.55 V (±0.15 V) with hysteresis - ensures reliable brown-out detection and system reset before logic corruption occurs. |
Pinout & Package
MC908QC16CDZE is housed in a 28-lead Thin Shrink Small Outline Package (TSSOP) with 0.65 mm lead pitch, JEDEC MO-153 compliant, and thermal pad optional. Pin functions support multiplexed I/O, analog inputs, serial interfaces, and oscillator connections.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers digital core and I/O; VSS is common return - requires local decoupling per layout guidelines. |
| OSC1, OSC2 | Crystal/resonator connection | Supports external 1–8 MHz crystal or ceramic resonator; internal RC oscillator available as fallback - enables robust clock source selection. |
| PTA0–PTA7 | Port A bidirectional I/O | 8-bit general-purpose port with pull-up enable and interrupt capability on PTA0–PTA3 - used for keypad scanning or GPIO expansion. |
| PTB0–PTB7 | Port B bidirectional I/O | 8-bit port with alternate functions including ESCI TX/RX, SPI SCK/MOSI/MISO, and TIM1/2 capture/compare - enables flexible peripheral routing. |
| PTC0–PTC7 | Port C analog/digital I/O | 8-bit port with ADC channel mapping (AD0–AD7), VREFH/VREFL inputs, and KBI support - serves as primary analog front-end interface. |
| IRQ | External interrupt request | Edge-triggered active-low input with configurable polarity - used for emergency stop, fault signaling, or wake-from-stop events. |
Key Features
| Feature | Design Value |
|---|---|
| FLASH Security Bytes | User-programmable 8-byte pattern at $FFF6–$FFFD enforces monitor mode access control - prevents unauthorized firmware dump during development or service. |
| ADC10 Module | 10-bit resolution with 8-channel multiplexer, programmable sample time, and conversion complete interrupt - enables simultaneous monitoring of multiple analog sensors. |
| COP Watchdog | Configurable timeout (0.5 ms to 1.6 s) with independent clock source (RCCLK) - guarantees recovery from software lockup even if main clock fails. |
| Low-Power Stop Mode | Typical current draw of 1.0 µA at 3.3 V and 25°C - extends battery life in portable or energy-harvesting applications. |
| ESCI UART | Full-duplex asynchronous communication with 13-bit baud rate divisor and noise filtering - supports robust RS-232/RS-485 interface with minimal external components. |
Applications
| Industrial Sensor Node | Home Appliance Control |
|---|---|
Use Scenario: Standalone temperature/humidity sensor node with local display and wired UART output. IC Role / Device Role / Timing Role: Main system controller executing sensor polling, ADC conversion, data formatting, and ESCI transmission. Use Value: Integrated 10-bit ADC and ESCI eliminate need for external signal conditioning or level translators, reducing BOM count by 3 components. |
Use Scenario: Washing machine drum motor controller with speed feedback, water level sensing, and user interface. IC Role / Device Role / Timing Role: Real-time motor sequencing engine using TIM2 PWM outputs and KBI-driven button inputs. Use Value: On-chip 16 KB FLASH stores motor profiles and calibration tables; COP watchdog ensures safe shutdown on stall detection. |
| Smart Thermostat Interface | Energy Meter Front-End |
Use Scenario: Battery-powered thermostat with ambient temperature sensing, LCD drive, and IR remote decode. IC Role / Device Role / Timing Role: Low-power system manager entering STOP mode between 1-second sensor reads and waking on KBI or RTC alarm. Use Value: 1.0 µA stop current and programmable LVI threshold extend coin-cell lifetime beyond 2 years. |
Use Scenario: AC energy meter measuring voltage/current via shunt/CT, computing kWh, and reporting via optical UART. IC Role / Device Role / Timing Role: Analog acquisition controller synchronizing ADC sampling to line cycle zero-crossing via IRQ edge detection. Use Value: 10-bit ADC with internal reference achieves ±0.5% measurement accuracy over –40°C to +85°C without external voltage reference IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC908QC8CDZE | 8 KB FLASH, identical pinout and peripheral set - lacks 8 KB of program storage and associated configuration registers. | Suitable for simpler control tasks with smaller firmware footprints, e.g., basic timer-based lighting controllers. | Select when firmware size remains under 7.5 KB and no EEPROM emulation is required. |
| MC908QY4CDTE | 4 KB FLASH, 20-pin SOIC package, no ESCI module - reduced I/O count and missing UART functionality. | Targeted at ultra-low-cost, space-constrained applications like single-function remote controls or simple LED drivers. | Choose only when UART communication is unnecessary and board area is severely limited. |
Compared with MC908QC8CDZE and MC908QY4CDTE, the MC908QC16CDZE provides the largest on-chip FLASH capacity and full peripheral complement in the QC family, making it the preferred choice for feature-rich, upgradeable embedded designs requiring field firmware updates and multi-sensor integration.
Availability
MC908QC16CDZE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control systems, and smart thermostat interfaces requiring stable component supply and long-term manufacturing continuity.
Supply support for MC908QC16CDZE 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
Freescale Semiconductor (now part of NXP Semiconductors) pioneered 8-bit MCU architectures for cost-sensitive, low-power embedded control with high integration density and robust industrial qualification.
The MC908QC16CDZE belongs to the HCS08-based QC family designed specifically for appliance motor control, sensor interfacing, and industrial automation where FLASH security, analog integration, and low-power operation are critical.
FAQ
What is the maximum bus frequency supported by the MC908QC16CDZE?
The MC908QC16CDZE supports a maximum bus frequency of 8 MHz, derived from internal RC, external crystal, or ceramic resonator sources. This frequency determines instruction execution speed, peripheral timing (e.g., ESCI baud rate, ADC conversion time), and real-time loop performance. Operation above 8 MHz is not guaranteed and may cause timing violations in FLASH access or peripheral modules.
How does the FLASH security feature work on the MC908QC16CDZE?
The MC908QC16CDZE implements FLASH security by requiring eight user-defined bytes programmed into memory locations $FFF6–$FFFD. During monitor mode entry, the host must transmit matching bytes; if five or more are zero, monitor mode access is denied. This prevents unauthorized firmware reading while allowing legitimate debug access when correct keys are supplied.
Can the MC908QC16CDZE operate from a 3.3 V supply?
Yes, the MC908QC16CDZE operates across a supply range of 2.7 V to 5.5 V, fully supporting 3.3 V nominal systems. At 3.3 V, it maintains full functionality including 8 MHz bus operation, ADC conversion, and ESCI communication - verified in the 3.3-V DC Electrical Characteristics table (Section 19.8) of the datasheet.
What peripherals are included in the MC908QC16CDZE?
The MC908QC16CDZE integrates an ADC10 (10-bit, 8-channel), ESCI (UART), SPI, two timer modules (TIM1 and TIM2), Keyboard Interrupt (KBI), Computer Operating Properly (COP) watchdog, Low-Voltage Inhibit (LVI), and Periodic Wakeup (PWU). All are accessible via the System Integration Module (SIM) and share the HCS08 core's interrupt vectoring architecture.
Is the MC908QC16CDZE pin-compatible with other devices in the QC family?
Yes, the MC908QC16CDZE shares the same 28-pin TSSOP package and pin assignment with MC908QC8CDZE and MC908QC4CDZE. Signal mapping for VDD, VSS, OSC1/OSC2, IRQ, KBI, ESCI, SPI, and ADC channels is identical - enabling hardware reuse across firmware variants with different FLASH sizes.
MC908QC16CDZE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 28-SOIC (0.295", 7.50mm Width)
- Series:
- HC08
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- HC08
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- LVD, POR, PWM
- Number of I/O:
- 24
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 10x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC908QC16CDZE FAQ
1.How can I place an order for MC908QC16CDZE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC908QC16CDZE 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 MC908QC16CDZE reliable?
The price and inventory of MC908QC16CDZE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC908QC16CDZE is usually 5 days.
3.What payment methods are accepted for MC908QC16CDZE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC908QC16CDZE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC908QC16CDZE?
MC908QC16CDZE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC908QC16CDZE 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 MC908QC16CDZE?
For technical support, including MC908QC16CDZE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC908QC16CDZE requirements.
6.How does Aetrix verify that MC908QC16CDZE is sourced from the original manufacturer or authorized distributors?
All MC908QC16CDZE 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 MC908QC16CDZE meets industry standards.
7.What is the process for return or replacement of MC908QC16CDZE?
All MC908QC16CDZE units undergo pre-shipment inspection (PSI). If there is an issue with MC908QC16CDZE, 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 MC908QC16CDZE part is unused and in its original packaging.
Return procedure for MC908QC16CDZE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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