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NXP Semiconductors MC908GT16CBE
- Part No.:
- MC908GT16CBE
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 42-SDIP (0.600", 15.24mm)
- Datasheet:
-
MC908GT16CBE.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 42DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,681
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Product details
Overview
MC908GT16CBE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 16 KB on-chip flash memory, 512 B RAM, and integrated peripherals including 10-bit ADC (8 channels), ESCI UART, SPI, TIM, KBI, and COP watchdog. It operates at up to 8 MHz bus frequency, supports 2.7–5.5 V supply, and targets low-cost embedded control in industrial sensors and appliance motor interfaces.
For engineers reviewing the MC908GT16CBE datasheet, MC908GT16CBE pinout, MC908GT16CBE application, or MC908GT16CBE equivalent, key selection criteria include flash endurance (100k erase/write cycles), internal clock generator trimmability, IRQ/KBI interrupt latency, and compatibility with legacy HC08 toolchains and debug monitors.
Technical Context
The MC908GT16CBE implements the CPU08 core with 16-bit address space, indexed addressing, and 43-instruction set optimized for deterministic real-time control. Its System Integration Module (SIM) integrates reset generation, clock selection (DCO, crystal, external), and power management modes (Wait/Stop).
Peripheral integration includes a 10-bit successive-approximation ADC with programmable conversion time (16–256 µs), ESCI supporting asynchronous full-duplex UART at up to 115.2 kbps, and SPI master/slave with 4-MHz max SCK. All I/O ports support configurable pull-ups and interrupt-on-change capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | CPU08 8-bit CISC core with 16-bit address bus and 43 instructions; enables compact firmware and predictable interrupt response. |
| Flash Memory | 16 KB on-chip flash with 100,000 erase/write cycles and block protection; supports in-system programming via background debug mode. |
| RAM Size | 512 bytes of on-chip RAM; sufficient for stack, variables, and small buffers in sensor/control applications. |
| ADC Resolution | 10-bit SAR ADC with 8 input channels and ±1 LSB integral nonlinearity; suitable for precision temperature and voltage monitoring. |
| Max Bus Frequency | 8 MHz at 5.0 V supply; defines instruction throughput and peripheral timing margins for real-time loop execution. |
| Supply Voltage | 2.7–5.5 V operation; allows direct interface with 3.3 V logic or legacy 5 V systems without level-shifting. |
| I/O Pins | 34 general-purpose I/O pins across Ports A–E; all support interrupt-on-change and software-configurable pull-ups. |
Pinout & Package
MC908GT16CBE is housed in a 48-pin QFP (Quad Flat Package) with 0.5 mm pitch, JEDEC MS-026AC compliant. Package dimensions are 7.0 × 7.0 × 1.4 mm, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD/VSS for digital logic; VDDA/VSSA (separate pins) for ADC analog section to minimize noise coupling. |
| PTE4/OSC1, PTE3/OSC2 | Crystal oscillator inputs | Supports 1–8 MHz quartz crystals; internal load capacitors eliminate need for external caps in basic configurations. |
| RST | Active-low reset input | Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion. |
| IRQ | External interrupt request | Level-sensitive, edge-triggerable input with dedicated vector; used for urgent event handling (e.g., fault detection). |
| PTA0–PTA7 / KBD0–KBD7 | Port A with keyboard interrupt | 8-bit port with KBI module support; enables matrix keypad scanning with hardware debouncing and wake-from-Stop capability. |
| PTB0–PTB7 / AD0–AD7 | Analog input multiplexer | 8-channel ADC input mapping; each pin configurable as digital I/O or analog input with selectable reference (VREFH/VREFL). |
| PTE0/TxD, PTE1/RxD | ESCI serial interface | Full-duplex UART pins; support asynchronous communication at standard baud rates up to 115.2 kbps with automatic break detection. |
Key Features
| Feature | Design Value |
|---|---|
| Background Debug Mode (BDM) | Single-wire debug interface enabling non-intrusive flash programming, breakpoint setting, and register inspection without dedicated debug hardware. |
| Internal Clock Generator (ICG) | Digitally controlled oscillator (DCO) with ±4% factory trim and user-adjustable multiplier/divider; eliminates need for external crystal in cost-sensitive designs. |
| Computer Operating Properly (COP) | Watchdog timer with selectable timeout (0.5 ms to 1.6 s); resets MCU if firmware fails to service COP within window - critical for safety-critical control loops. |
| Low-Voltage Inhibit (LVI) | On-chip brown-out detector with 2.5 V threshold; forces reset during undervoltage conditions to prevent erratic code execution. |
| Keyboard Interrupt Module (KBI) | Hardware scan engine for up to 64-key matrix; generates interrupt on key press/release and wakes MCU from Stop mode - ideal for battery-powered UIs. |
Applications
| Industrial Sensor Node | Home Appliance Control |
|---|---|
Use Scenario: Temperature/humidity sensing node with local display and RS-485 communication. IC Role / Device Role / Timing Role: Central controller managing ADC sampling, LCD segment drive, ESCI-to-RS485 translation, and periodic data transmission. Use Value: Integrated 10-bit ADC and ESCI reduce BOM count; 16 KB flash accommodates sensor fusion algorithms and communication stack. |
Use Scenario: Washing machine main control board managing motor drive, water valve, heater, and user interface. IC Role / Device Role / Timing Role: Real-time sequencer coordinating PWM motor control, KBI-based button panel, and fault-safe thermal shutdown. Use Value: COP watchdog ensures fail-safe behavior during spin cycle; KBI enables low-power wake-on-button with no external logic. |
| Smart Power Outlet | Motorized Window Shade Controller |
Use Scenario: Wi-Fi-enabled outlet with energy monitoring, relay control, and overcurrent protection. IC Role / Device Role / Timing Role: Local decision engine sampling current sense ADC, driving relay driver, and communicating status to host MCU via SPI. Use Value: 34 GPIOs support isolated relay control, status LEDs, and auxiliary sensors; 2.7–5.5 V range simplifies auxiliary power design. |
Use Scenario: Battery-powered shade controller with position feedback, limit switch detection, and IR remote interface. IC Role / Device Role / Timing Role: Low-power motion sequencer using TIM for motor timing, KBI for IR decode, and ADC for battery voltage monitoring. Use Value: Stop mode current < 1 µA extends battery life; internal LVI prevents brown-out resets during motor startup surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC908GT8CBE | 8 KB flash, same package and pinout; identical peripheral set except reduced RAM (256 B) and fewer ADC channels (4 vs. 8). | Suitable for simpler control tasks with smaller firmware footprint and fewer analog inputs. | Select when application firmware fits in 8 KB and only 4 analog channels are required - reduces cost without redesign. |
| MC9RS08KA2CSC | RSA08 core, 2 KB flash, 128 B RAM, no KBI or ESCI; uses different debug interface (SWD) and lacks COP module. | Targeted at ultra-low-cost, single-function tasks like LED dimming or simple timers where UART or keyboard scan is unnecessary. | Choose only for new designs prioritizing lowest unit cost and minimal feature set; not drop-in compatible due to architecture and peripheral differences. |
Compared with MC908GT16CBE, MC908GT8CBE offers identical functionality at lower memory capacity and cost, while MC9RS08KA2CSC represents a newer, lower-resource architecture with trade-offs in debug compatibility, peripheral richness, and safety features.
Availability
MC908GT16CBE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control units, and smart power outlet designs requiring stable component supply and long-term manufacturing continuity.
Supply support for MC908GT16CBE 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) is a pioneer in 8-bit and 32-bit microcontrollers, known for automotive-grade reliability and broad ecosystem support.
The MC908GT16CBE belongs to the HCS08 family, designed specifically for cost-sensitive, low-power embedded control applications demanding robustness, integrated analog peripherals, and legacy toolchain compatibility.
FAQ
What is the maximum operating frequency of the MC908GT16CBE?
The MC908GT16CBE supports a maximum bus frequency of 8 MHz at 5.0 V supply. This frequency is derived from the internal clock generator (ICG) and determines instruction execution speed, peripheral timing, and ADC conversion rate. At lower supply voltages (e.g., 3.0 V), the maximum rated bus frequency is reduced to 4 MHz per electrical specifications in Rev. 5.0 datasheet Section 20.8.
Does the MC908GT16CBE support in-circuit debugging?
Yes, the MC908GT16CBE includes Background Debug Mode (BDM) accessible via a single-wire interface. This allows full in-system programming, real-time register inspection, and breakpoint-based debugging without halting system clocks or requiring dedicated JTAG hardware - a key advantage for field firmware updates and development efficiency.
Can the MC908GT16CBE operate from a 3.3 V supply?
Yes, the MC908GT16CBE is fully specified for 2.7–5.5 V operation, including 3.3 V nominal supply. Electrical characteristics such as I/O voltage levels, ADC accuracy, and bus timing are guaranteed across this range per Section 20.6 of the Rev. 5.0 datasheet, enabling direct interfacing with 3.3 V logic families.
How many ADC channels does the MC908GT16CBE have, and what is their resolution?
The MC908GT16CBE integrates a 10-bit successive-approximation ADC with 8 input channels mapped to Port B pins (PTB0–PTB7). Each channel supports programmable sample time and reference selection (VREFH/VREFL), delivering ±1 LSB integral nonlinearity and monotonicity across the full operating range.
Is the MC908GT16CBE pin-compatible with other members of the GT16 family?
Yes, the MC908GT16CBE shares identical 48-pin QFP packaging and pinout with MC68HC908GT16 and MC68HC08GT16 variants. This enables direct substitution in existing PCB layouts when migrating between mask-ROM (HC08GT16), OTP (HC908GT16), or flash-based (MC908GT16CBE) versions - provided firmware and configuration registers are updated accordingly.
MC908GT16CBE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 42-SDIP (0.600", 15.24mm)
- 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:
- 36
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 8x8b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
MC908GT16CBE FAQ
1.How can I place an order for MC908GT16CBE through Aetrix?
Please submit a Request for Quotation (RFQ) for MC908GT16CBE 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 MC908GT16CBE reliable?
The price and inventory of MC908GT16CBE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC908GT16CBE is usually 5 days.
3.What payment methods are accepted for MC908GT16CBE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC908GT16CBE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC908GT16CBE?
MC908GT16CBE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC908GT16CBE 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 MC908GT16CBE?
For technical support, including MC908GT16CBE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC908GT16CBE requirements.
6.How does Aetrix verify that MC908GT16CBE is sourced from the original manufacturer or authorized distributors?
All MC908GT16CBE 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 MC908GT16CBE meets industry standards.
7.What is the process for return or replacement of MC908GT16CBE?
All MC908GT16CBE units undergo pre-shipment inspection (PSI). If there is an issue with MC908GT16CBE, 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 MC908GT16CBE part is unused and in its original packaging.
Return procedure for MC908GT16CBE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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