NXP Semiconductors MC9S08AC16MBE

Overview

MC9S08AC16MBE from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 16 KB Flash, 1 KB RAM, 40-MHz CPU, 3× 16-bit TPM modules, dual SCI, SPI, I²C, 8-channel 10-bit ADC, and up to 38 GPIO - designed for industrial control and consumer appliance mainboard applications.

For engineers reviewing the MC9S08AC16MBE datasheet, MC9S08AC16MBE pinout, MC9S08AC16MBE application, or MC9S08AC16MBE equivalent, key selection considerations include its QFN-48 package, copper-wire interconnect migration (98ASA00466D), on-chip debug module with FIFO trace, COP watchdog with independent clock source, and support for Stop2/Stop3 low-power modes in battery-backed systems.

Technical Context

The MC9S08AC16MBE implements the S08CPUV2 core with HC08 instruction set extension (BGND), 20-MHz bus frequency, and background debugging system featuring two comparators, nine trigger modes, and eight-deep FIFO for change-of-flow address logging. Its internal clock generator (S08ICGV4) supports FEI/FEE/FBE modes with NVM-trimmed precision and optional crystal/resonator input.

Peripherals include three timer/pulse-width modulator (TPM) modules - two 2-channel and one 4-channel - each supporting input capture, output compare, edge-aligned PWM, and buffered center-aligned PWM. The ADC provides automatic compare function across 8 channels with 10-bit resolution and internal temperature sensor.

Key Specifications

Pinout & Package

MC9S08AC16MBE is housed in a 48-pin quad flat no-lead (QFN) package with exposed thermal pad (case outline 98ASA00466D), migrated from gold to copper wire bonding per Freescale QFN Addendum Rev. 0 (July 2014).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC9S08AC16MBE, MC9S08AC60 offers scalable code density without changing pinout or driver software, while MC9S08AW16A adds automotive qualification at the cost of higher unit price and longer lead times - neither is pin-compatible without validation of thermal pad layout and copper-wire bonding compatibility.

Availability

MC9S08AC16MBE is available at Aetrix Electronics and suitable for home appliance control, industrial sensor nodes, consumer electronics UI, and factory automation I/O modules requiring stable component supply across multi-year production cycles.

Supply support for MC9S08AC16MBE 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 since 2015) was a leading designer of embedded processors, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The MC9S08AC16MBE belongs to the HCS08 family - engineered for cost-sensitive, real-time control applications demanding robust debug capability, low-power operation, and mixed-signal integration in compact QFN packages.

FAQ

What is the package type and thermal pad specification for MC9S08AC16MBE?

The MC9S08AC16MBE uses a 48-pin QFN package with exposed thermal pad (case outline 98ASA00466D), migrated from gold to copper wire bonding per Freescale QFN Addendum Rev. 0. The thermal pad must be soldered to a solid copper pour for thermal dissipation and EMI reduction; recommended land pattern matches the 98ASA00466D mechanical drawing.

Does MC9S08AC16MBE support in-circuit debugging without external tools?

Yes, MC9S08AC16MBE integrates a background debug module (BDM) accessible via the single BKGD/MS pin. It supports breakpoint setting, memory inspection, register read/write, and real-time trace using the eight-deep FIFO - enabling full firmware development and field diagnostics without JTAG hardware.

What clock sources does MC9S08AC16MBE support, and how is accuracy maintained?

MC9S08AC16MBE supports crystal, resonator, external clock, or internally generated clock with NVM-trimmed precision. The internal clock generator (S08ICGV4) uses factory-trimmed values stored in nonvolatile memory to calibrate FLL operation, achieving ±2% bus frequency accuracy over temperature without external components.

How many PWM channels does MC9S08AC16MBE provide, and what advanced modes are supported?

MC9S08AC16MBE provides up to 8 PWM channels across three 16-bit TPM modules (two 2-channel + one 4-channel). Each channel supports edge-aligned and buffered center-aligned PWM (CPWM), with independent period/phase control - essential for reducing acoustic noise and improving efficiency in motor and lighting control.

Is MC9S08AC16MBE suitable for automotive applications?

No - MC9S08AC16MBE is rated for industrial temperature range (−40°C to 85°C) and lacks AEC-Q100 qualification. For automotive use, Freescale specifies the pin-compatible MC9S08AW16A variant, which meets Grade 2 requirements (−40°C to 105°C) and includes additional stress screening and failure reporting.