MC9S08GT16CFBE - 8-Bit S08 MCU, 16KB Flash, 40MHz | NXP
MPN: MC9S08GT16CFBE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.45 | $6.45 |
| 10 | $5.95 | $59.50 |
| 100 | $5.45 | $545.00 |
| 500 | $5.05 | $2,525.00 |
| 1,000 | $4.65 | $4,650.00 |
MC9S08GT16CFBE Overview
An 8-bit microcontroller integrates a processor core, memory, and peripherals on a single chip, forming the lowest tier of the embedded MCU hierarchy (MCU -> embedded processor -> system-on-chip). The S08 family succeeded the popular 68HC08 architecture, offering enhanced debugging (background debug mode), lower power modes, and richer peripherals while preserving CISC code compatibility. MCUs of this class typically run at CPU frequencies of tens of MHz and serve cost-sensitive embedded control tasks.
Key features of the MC9S08GT16CFBE include 16 KB (16K x 8) of in-circuit programmable Flash, 2 KB of RAM, I2C, SCI (UART), and SPI serial interfaces, an 8-channel 10-bit analog-to-digital converter, and on-chip system protection functions including low-voltage detection (LVD), power-on reset (POR), a computer operating properly (COP) watchdog, and PWM capability. The part operates from a 2.5 V or 3.3 V supply per distributor specifications.
Architecturally, the enhanced S08 core executes the HC08 instruction set with a background debug module (BDM) allowing non-intrusive flash programming and real-time debugging over a single-wire interface. Multiple low-power stop and wait modes make it suitable for battery-conscious designs, and the flash memory supports in-application reprogramming for field updates.
Typical applications include industrial control and automation, consumer appliance control panels, HVAC system controllers, battery chargers, and low-cost human-machine interfaces where 16 KB of code space and rich serial connectivity are sufficient.
When designing with this MCU, note that it is a legacy device: NXP has discontinued it and production today is handled by Rochester Electronics under authorized continuity, so new designs should evaluate the MC9S08GT16A successor family.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for MC9S08GT16CFBE — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC9S08GT16CFBE (same form factor and footprint) — differing in Package, Core Processor, Instruction Set, Operating Temperature, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08GT16ACFBE
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08GT16ACFBER
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08GT8ACFBE
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08GT16CFBE Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (HCS08) 8-bit CISC |
| Core Size | 8-Bit |
| Maximum Bus Frequency | 40 MHz |
| Flash Memory | 16 KB (16K x 8) |
| RAM | 2 KB |
| EEPROM | None (Flash-based) |
| Supply Voltage | 2.5 V / 3.3 V |
| ADC Resolution | 10-bit (8 channels) |
| Communication Interfaces | I2C, SCI, SPI |
| Peripherals | LVD, POR, PWM, WDT |
| Number of I/O | 36 |
| Package | 44-QFP (10x10 mm) |
| Mounting Type | Surface Mount |
| Packaging | Tray |
MC9S08GT16CFBE 44-qfp (10x10 mm) Pin Configuration Guide
Pin configuration for MC9S08GT16CFBE (44-qfp (10x10 mm) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S08GT16CFBE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08GT16CFBE is suitable for 6 applications: Industrial Control and Automation, Appliance and Consumer Control Panels, HVAC and Climate Control Systems, Battery-Powered Portable Instruments, Motor Control and PWM Actuation, Legacy System Maintenance and Repair.
Industrial Control and Automation
The MC9S08GT16CFBE fits industrial control nodes that need modest code space, robust system protection, and multiple serial buses. Its 40 MHz S08 core executes control loops with predictable CISC timing, while the 16 KB Flash accommodates communication stacks for I2C, SPI, and SCI links to drives, sensors, and displays. The on-chip watchdog (WDT), low-voltage detection (LVD), and power-on reset (POR) provide the fault tolerance demanded in factory environments, and the 8-channel 10-bit ADC digitizes analog process variables such as temperature and current without external conversion ICs. Typical deployments place the MCU as a node controller reading sensors over I2C and commanding actuators via PWM outputs; using the internal Flash for parameter storage removes the need for a separate EEPROM. Trade-off: its 2 KB RAM limits complex protocol stacks, so keep buffering shallow.
Recommended
Appliance and Consumer Control Panels
Appliance user interfaces - washers, cooktops, and small HVAC units - are a classic S08 GT16 use case. The MC9S08GT16CFBE's 36 I/O lines directly drive seven-segment displays, LEDs, and relays, while the 10-bit ADC reads touch or rotary encoder inputs and temperature sensors. The 16 KB Flash stores menu logic, fault logging, and UI firmware with room for field updates, and the 2.5 V/3.3 V operation simplifies power design from a single rail. Because the S08 core offers multiple low-power stop and wait modes, the MCU can sleep between key presses, extending battery life in cordless panel designs. Recommended layout practice: dedicate ADC channels with local RC filtering to prevent relay-switching transients from corrupting readings. For cost-sensitive high-volume panels, pair the MCU with a TSA7887-style driver to offload LED segment drive current.
Recommended
HVAC and Climate Control Systems
In HVAC controllers, the MC9S08GT16CFBE combines sensor acquisition, actuator control, and communication in one 44-QFP device. The 8-channel 10-bit ADC samples NTC thermistors and pressure sensors for room and coil temperatures, while PWM outputs modulate damper motors, fans, and heater elements. The SCI (UART) interface connects to RS-485 transceivers for building automation networks, and the I2C bus interfaces real-time clocks and configuration EEPROMs. The watchdog and LVD functions meet the reliability expectations of unattended equipment that must recover from brownouts automatically. With 16 KB Flash, control algorithms such as PID loops plus a protocol handler fit comfortably. Designers should budget the 2 KB RAM carefully when buffering multi-drop communication, and use the internal flash for setpoint retention across power cycles.
Recommended
Battery-Powered Portable Instruments
Portable handheld meters and data loggers benefit from the S08 family's low-power stop modes and the GT16CFBE's integrated analog front end. Running from a 2.5 V or 3.3 V rail, the MCU's 8-channel 10-bit ADC converts battery voltage, probe inputs, and ambient sensors, while SCI provides a debug or PC-download link. The 16 KB Flash holds logging firmware and calibration tables, and in-application Flash programming allows logged data or calibration constants to be stored without external non-volatile memory. The COP watchdog ensures recovery if a firmware fault occurs during long field deployments. Because current budget dominates this class of design, engineers should clock the bus below the 40 MHz maximum when full speed is unnecessary, since dynamic power scales with frequency. Estimated: at typical S08 run currents of a few mA per MHz, dropping from 40 MHz to 8 MHz cuts CPU power roughly 5x.
Recommended
Motor Control and PWM Actuation
Small DC motor and actuator control is well within the MC9S08GT16CFBE's capability: the S08 timers generate PWM outputs with configurable period and duty cycle, driving MOSFET gate drivers or H-bridge modules for fans, pumps, and latches. Closed-loop speed or position control uses the 10-bit ADC to read back-EMF, current-sense shunt voltages, or hall/encoder-derived analog levels. The 40 MHz maximum bus clock provides sufficient timer resolution for 20 kHz-class PWM with fine duty steps, and the 16 KB Flash holds the control law plus fault-handling routines such as over-current shutdown driven by the comparator/LVD subsystem. Recommended practice: place ADC sampling synchronized to PWM off-periods to avoid switching noise, and use the watchdog to force a safe stop if firmware hangs while a motor is energized.
Recommended
Legacy System Maintenance and Repair
A significant ongoing use of the MC9S08GT16CFBE is sustaining existing equipment: industrial machines, medical devices, and telecom hardware designed in the 2004-2010 era commonly contain this exact MCU. When a board must be repaired or a small production run rebuilt, the Rochester Electronics continuity supply is the authorized source, since the silicon is produced from the original Freescale qualification. The 44-QFP package with 36 I/O permits direct socket-and-replace servicing. Engineers maintaining these systems should archive the MC9S08GT16 family datasheet, the BDM debugging tools, and flashing firmware images, because toolchain availability is shrinking. For long-life programs, XAIPART recommends qualifying the MC9S08GT16ACFBE enhanced revision as a form-fit-function substitute now, so a second-source path exists before the legacy stock depletes.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08GT16CFBE — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08GT16ACFBE | MC9S08GT16ACFBER | MC9S08GT8ACFBE |
|---|---|---|---|---|
| Package | 44-QFP (10x10 mm) | 44-QFP (10x10 mm) - same | 44-QFP (10x10 mm) - same | 44-QFP (10x10 mm) - same |
| Brand | NXP Semiconductors (Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 16 KB | 16 KB | 16 KB | 8 KB |
| RAM | 2 KB | 2 KB | 2 KB | 1 KB |
| Max Bus Frequency | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Interfaces | I2C, SCI, SPI | I2C, SCI, SPI | I2C, SCI, SPI | I2C, SCI, SPI |
| Lifecycle Status | Obsolete (Rochester continuity) | Active (current GT16A family) | Active (current GT16A family) | Active (GT8A family) |
| Supply Voltage | 2.5 V / 3.3 V | 2.5 V / 3.3 V | 2.5 V / 3.3 V | 2.5 V / 3.3 V |
Key Differentiators
- 16 KB Flash and 2 KB RAM in 44 pins (vs MC9S08GT8ACFBE)
- Active lifecycle via A-revision family (vs MC9S08GT16ACFBE)
- Integrated system protection peripherals (vs MC9S08GT16ACFBER)
Design Notes
The MC9S08GT16CFBE is discontinued by NXP and is supplied today through Rochester Electronics' authorized continuity channel (DigiKey lists the part under Rochester Electronics). This has three practical consequences: order long-lead quantities while stock exists; obtain certificates of conformance with each lot to guard against counterfeits in the after-market; and qualify the MC9S08GT16ACFBE enhanced revision as a second source now, since it is the active family successor in the same 44-QFP footprint. Do not design the CFBE into new products.
For the 10x10 mm 44-QFP, use a standard 0.65 mm pitch QFP land pattern per the NXP package drawing and place a 0.1 uF ceramic decoupling capacitor within 3 mm of each VDD/VSS pin pair, plus a 1-10 uF bulk capacitor near the supply entry. Tie all VSS pins to a solid ground plane and avoid routing fast signals (SPI clock) under the MCU to reduce crosstalk into the 10-bit ADC. Keep analog ADC channel traces short and guarded by ground when the 8-channel ADC is used for precision sensing.
The GT16CFBE operates from a 2.5 V or 3.3 V rail; if the design must tolerate battery sag, rely on the on-chip low-voltage detection (LVD) to hold the MCU in reset rather than attempting operation below the datasheet minimum. Estimated: at 3.3 V and full 40 MHz bus speed, an S08-class core draws in the low-mA range, so a linear regulator from a 5 V rail dissipates only modest power ((5-3.3) V x few mA = a few mW), but for battery designs prefer a buck converter or run the bus clock lower, since dynamic current scales approximately linearly with frequency.
Compliance Information
RoHS/REACH status not explicitly stated in the verified web data. The BE suffix conventionally denotes lead-free packaging on Freescale/NXP parts, but this must be confirmed via NXP product page or Rochester Electronics certificate of conformance. Not an automotive AEC-Q100 device per available family data.