NXP Semiconductors MC908GT16CFBE

Overview

MC908GT16CFBE from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 16 KB on-chip flash memory, 512 B RAM, and integrated peripherals including 8-channel 10-bit ADC, ESCI serial interface, SPI, TIM, TBM, and KBI. 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 MC908GT16CFBE datasheet, MC908GT16CFBE pinout, MC908GT16CFBE application, or MC908GT16CFBE equivalent, key selection criteria include its 44-pin QFP package, internal clock generator with DCO and clock monitor, COP watchdog timeout configurability, and Flash block protection for firmware security in cost-sensitive, low-power control systems.

Technical Context

The MC908GT16CFBE implements the HCS08 CPU core with enhanced addressing modes and a 16-level hardware stack. Its Internal Clock Generator (ICG) integrates a digitally controlled oscillator (DCO), modulo-N divider, frequency comparator, and digital loop filter to achieve ±4% accuracy across voltage and temperature without external crystals.

The System Integration Module (SIM) provides reset control, interrupt arbitration, and low-power mode management (Wait/Stop), while the ESCI module supports asynchronous serial communication with programmable baud rate generation and parity control - all operating under a single unified memory map with no external bus interface.

Key Specifications

Pinout & Package

MC908GT16CFBE is housed in a 44-pin plastic quad flat pack (QFP) with 0.8 mm lead pitch, compliant with JEDEC MS-026. The package supports surface-mount reflow assembly and provides full I/O access to all integrated peripherals.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar microcontroller applications.

Compared with MC908GT16CFBE, the MC908GT8CFBE offers identical peripheral functionality at reduced memory density for simpler control tasks, while the MC9RS08KA8CFD delivers lower active current but mandates complete firmware rework due to architectural divergence.

Availability

MC908GT16CFBE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance controllers, smart power outlets, and factory automation I/O modules requiring stable component supply across extended production lifecycles.

Supply support for MC908GT16CFBE 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) designed high-performance, mixed-signal microcontrollers for automotive, industrial, and consumer applications before its 2015 acquisition.

The MC908GT16CFBE belongs to the HCS08 family, engineered for cost-effective, low-power embedded control in resource-constrained systems where integration of ADC, serial interfaces, and robust reset/watchdog features is essential.

FAQ

What is the maximum operating frequency of the MC908GT16CFBE?

The MC908GT16CFBE supports a maximum bus frequency of 8 MHz, derived from its internal clock generator's digitally controlled oscillator (DCO) or external crystal input. This frequency defines the timing base for instruction execution, peripheral operation, and interrupt latency - all verified across the full –40 °C to +85 °C temperature range and 2.7–5.5 V supply.

Does the MC908GT16CFBE include a hardware watchdog timer?

Yes, the MC908GT16CFBE integrates a Computer Operating Properly (COP) module that functions as a configurable hardware watchdog timer. It offers selectable timeout periods ranging from 0.5 ms to 1.6 s via the COP Rate Select bits, and can be disabled during debug sessions using the COPD bit - a feature confirmed in the Rev. 5.0 datasheet Section 5.3.7.

Can the MC908GT16CFBE operate without an external crystal?

Yes, the MC908GT16CFBE can operate autonomously using its internal Digitally Controlled Oscillator (DCO), which achieves ±4% frequency accuracy across voltage and temperature without any external timing components. External crystals (1–8 MHz) or 32.768 kHz watch crystals are optional for higher precision or real-time clock applications.

What packaging format is used for the MC908GT16CFBE?

The MC908GT16CFBE is supplied in a 44-pin plastic quad flat pack (QFP) with 0.8 mm lead pitch, designated as package code "FBE" per Freescale's ordering information (Section 21, Rev. 5.0 datasheet). This RoHS-compliant package supports standard SMT reflow profiles and provides full access to all 36 I/O lines and power/ground pins.

How does the MC908GT16CFBE handle low-voltage conditions?

The MC908GT16CFBE incorporates an on-chip Low-Voltage Inhibit (LVI) circuit that monitors VDD and asserts a reset when supply drops below approximately 2.5 V (typical), with built-in hysteresis to prevent chatter during slow power ramp-down. This behavior is documented in Section 10 of the Rev. 5.0 datasheet and ensures deterministic startup and safe shutdown.