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NXP Semiconductors MC908QC16CDRE
- Part No.:
- MC908QC16CDRE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC908QC16CDRE.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,432
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Product details
Overview
MC908QC16CDRE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller featuring 16 KB on-chip FLASH, 512 B RAM, 10-bit ADC with 8 channels, ESCI and SPI serial interfaces, and integrated COP watchdog. It operates at up to 8 MHz bus frequency with 5 V supply and supports stop/wait low-power modes for battery-powered industrial controls.
For engineers reviewing the MC908QC16CDRE datasheet, MC908QC16CDRE pinout, MC908QC16CDRE application, or MC908QC16CDRE equivalent, key selection criteria include FLASH security byte validation ($FFF6–$FFFD), internal RC oscillator trimming (OSCTRIM register), LVI reset threshold (2.55 V typ.), ESCI asynchronous UART operation, and TSSOP-28 package compatibility with legacy HC08 toolchains.
Technical Context
The MC908QC16CDRE implements the HCS08 CPU core with 16-bit address space, supporting indexed, extended, and relative addressing. Its memory map includes 16 KB FLASH (with block protection and EEPROM emulation), 512 B RAM, and 64 B of configuration/flash control registers mapped in direct page.
Peripherals include a 10-bit successive-approximation ADC with programmable sample time and conversion trigger sources; ESCI module supporting full-duplex UART with selectable baud rates and break detection; and dual timer modules (TIM1/TIM2) with input capture, output compare, and PWM generation capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | HCS08 8-bit CPU with 16-bit address bus and 32-instruction cycle minimum execution time |
| FLASH Memory | 16 KB on-chip FLASH with mass/page erase, program verify, and block protection via FLASH Block Protect Register |
| RAM Size | 512 bytes static RAM with automatic retention during stop mode |
| ADC Resolution | 10-bit SAR ADC with 8 external input channels, configurable clock prescaler, and hardware conversion trigger support |
| Max Bus Frequency | 8 MHz - determines instruction throughput, peripheral timing, and ESCI baud rate accuracy |
| LVI Reset Threshold | 2.55 V (typ.) rising-edge trip voltage with hysteresis - ensures deterministic reset under brown-out conditions |
| Security Mechanism | 8-byte monitor-mode entry key stored at $FFF6–$FFFD; entry denied if ≥5 bytes equal $00 |
Pinout & Package
MC908QC16CDRE is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP) with 0.65 mm pitch, JEDEC MO-153 compliant, and thermal pad exposed on underside for enhanced heat dissipation in compact industrial PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 5 V DC power domain; VSS serves as analog/digital reference return path |
| OSC1, OSC2 | Crystal/resonator interface | Supports external crystal (1–8 MHz) or ceramic resonator; internal RC oscillator can be trimmed via OSCTRIM register |
| PTA0–PTA7 | Port A bidirectional I/O | 8-bit general-purpose port with pull-up enable, interrupt-on-change (KBI), and shared with ADC channel inputs |
| PTB0–PTB7 | Port B bidirectional I/O | 8-bit port with IRQ input (PTB0), ESCI TX/RX (PTB1/PTB2), and SPI signals (PTB3–PTB5) |
| PTC0–PTC7 | Port C bidirectional I/O | 8-bit port with TIM1/TIM2 channels, ADC reference pins (VREFH/VREFL), and RESET input (PTC7) |
Key Features
| Feature | Design Value |
|---|---|
| FLASH Security Enforcement | Monitor mode entry requires exact match of eight user-defined bytes at $FFF6–$FFFD; five or more zero bytes blocks access |
| ADC Voltage Reference Flexibility | VREFH/VREFL pins allow external reference or internal VDD/VSS sourcing - enables ratiometric sensor measurements |
| Low-Voltage Inhibit (LVI) | Dedicated analog comparator with 2.55 V trip point and hysteresis prevents erratic operation during power ramp-up/down |
| ESCI Asynchronous Communication | Full-duplex UART with programmable baud rate generator, break detect, and idle-line wake-up - suitable for RS-232/485 interfaces |
| Internal RC Oscillator Trim | OSCTRIM register allows ±15% frequency adjustment of internal 32 kHz RC oscillator - reduces need for external timing components |
Applications
| Industrial Sensor Node | Motor Control Interface |
|---|---|
|
Use Scenario: Standalone temperature/humidity data logger with local LCD display and RS-485 backhaul. IC Role / Device Role / Timing Role: Main system controller executing sensor polling, ADC conversion, display update, and ESCI-based protocol framing. Use Value: Integrated 10-bit ADC eliminates external converter; ESCI supports robust multi-drop communication; 16 KB FLASH accommodates firmware + calibration tables. |
Use Scenario: Brushless DC motor commutation logic with hall-effect feedback and PWM drive signals. IC Role / Device Role / Timing Role: Real-time timing engine generating synchronized PWM outputs and sampling hall sensors via port interrupts. Use Value: Dual TIM modules provide independent 16-bit counters for precise phase alignment; KBI supports fast edge-triggered hall signal capture. |
| Smart Power Meter Front-End | Legacy Equipment Retrofit Controller |
|
Use Scenario: AC mains monitoring unit measuring voltage/current via shunt/transformer and computing RMS/kWh values. IC Role / Device Role / Timing Role: Signal acquisition processor interfacing isolated ADCs and managing SPI-based energy IC communication. Use Value: 8-channel ADC supports simultaneous sampling of multiple analog inputs; SPI module handles high-speed register reads from metrology ICs. |
Use Scenario: Drop-in replacement for obsolete MC68HC11-based control boards in HVAC actuators. IC Role / Device Role / Timing Role: Pin-compatible upgrade path preserving existing PCB layout while enabling FLASH reprogramming in-system. Use Value: Same TSSOP-28 footprint and identical port mapping (PTA/B/C) simplifies migration; COP watchdog ensures fail-safe operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC908QC8CDRE | 8 KB FLASH, same core/peripherals but reduced memory - no EEPROM emulation support | Suitable for simpler control tasks without calibration storage or bootloader space requirements | Select when firmware size ≤64 KB and no field-upgrade capability needed |
| MC908QY4CDTE | 4 KB FLASH, SOIC-28 package, lacks ESCI module - only SCI (simplified UART) | Targeted at cost-sensitive, low-complexity applications with basic serial debug only | Choose for fixed-function designs where ESCI features (break detect, idle wake) are unused |
Compared with MC908QC16CDRE, the MC908QC8CDRE offers identical peripheral set and pinout but halves FLASH capacity, while the MC908QY4CDTE reduces both memory and serial functionality and changes package to SOIC - neither is pin-compatible nor drop-in, requiring layout revision for migration.
Availability
MC908QC16CDRE is available at Aetrix Electronics and suitable for industrial sensor nodes, motor control interfaces, smart power meter front-ends, and legacy equipment retrofit controllers requiring stable component supply and long-term lifecycle support.
Supply support for MC908QC16CDRE 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 automotive and industrial markets, emphasizing robustness, low-power operation, and toolchain maturity.
The MC908QC16CDRE belongs to the HCS08 family, designed specifically for cost-sensitive, real-time embedded control applications demanding integrated analog peripherals, secure in-system programming, and reliable operation across –40°C to +105°C.
FAQ
What is the FLASH security mechanism implemented in the MC908QC16CDRE?
The MC908QC16CDRE enforces FLASH security through an 8-byte key stored at memory addresses $FFF6–$FFFD. During monitor mode entry, the host must transmit matching bytes; if five or more are zero, access is denied. This prevents unauthorized firmware readout while allowing legitimate debug access using programmed keys.
Does the MC908QC16CDRE support external crystal oscillators?
Yes, the MC908QC16CDRE supports external crystals from 1 MHz to 8 MHz via OSC1/OSC2 pins. It also includes an internal RC oscillator (trimmable via OSCTRIM register) and supports dynamic switching between internal and external clock sources - critical for low-power wake-up and system reliability.
What ADC capabilities does the MC908QC16CDRE provide?
The MC908QC16CDRE integrates a 10-bit successive-approximation ADC with eight external input channels. It supports software/hardware triggering, programmable sample time, and flexible voltage reference selection (VDD/VSS or external VREFH/VREFL), enabling precision sensor interfacing in industrial measurement applications.
How does the Low-Voltage Inhibit (LVI) function protect the MC908QC16CDRE?
The LVI circuit in the MC908QC16CDRE monitors VDD and asserts a reset when voltage falls below 2.55 V (typ.) with built-in hysteresis. This prevents undefined CPU behavior or peripheral malfunction during brown-out events, ensuring deterministic restart once supply stabilizes - essential for unattended industrial systems.
Is the MC908QC16CDRE pin-compatible with other members of the QC family?
Yes, the MC908QC16CDRE shares identical pin assignments and electrical characteristics with MC908QC8CDRE and MC908QC4CDRE in the TSSOP-28 package. Port mappings, peripheral pinouts (ESCI, SPI, ADC), and power/ground locations are fully aligned - enabling scalable memory selection without PCB redesign.
MC908QC16CDRE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 28-TSSOP (0.173", 4.40mm 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:
MC908QC16CDRE FAQ
1.How can I place an order for MC908QC16CDRE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC908QC16CDRE 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 MC908QC16CDRE reliable?
The price and inventory of MC908QC16CDRE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC908QC16CDRE is usually 5 days.
3.What payment methods are accepted for MC908QC16CDRE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC908QC16CDRE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC908QC16CDRE?
MC908QC16CDRE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC908QC16CDRE 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 MC908QC16CDRE?
For technical support, including MC908QC16CDRE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC908QC16CDRE requirements.
6.How does Aetrix verify that MC908QC16CDRE is sourced from the original manufacturer or authorized distributors?
All MC908QC16CDRE 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 MC908QC16CDRE meets industry standards.
7.What is the process for return or replacement of MC908QC16CDRE?
All MC908QC16CDRE units undergo pre-shipment inspection (PSI). If there is an issue with MC908QC16CDRE, 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 MC908QC16CDRE part is unused and in its original packaging.
Return procedure for MC908QC16CDRE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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