NXP Semiconductors MC9RS08KB2CDC

Overview

MC9RS08KB2CDC from Freescale Semiconductor is an 8-bit RS08 core microcontroller with 2 KB flash, 126-byte RAM, and operation from 1.8 V to 5.5 V across –40 °C to 85 °C. It integrates ADC (12-channel, 10-bit), ACMP, TPM, IIC, SCI, RTI, and KBI peripherals, targeting low-power embedded control in space-constrained applications such as sensor nodes and smart actuators.

For engineers reviewing the MC9RS08KB2CDC datasheet, MC9RS08KB2CDC pinout, MC9RS08KB2CDC application, or MC9RS08KB2CDC equivalent, key selection considerations include its 8-pin DFN package (Case 1452-02), copper-wire QFN migration compliance, single-wire background debug interface, 10 MHz max bus frequency via internal FLL, and support for wake-up from Stop mode via ADC, ACMP, or SCI.

Technical Context

The MC9RS08KB2CDC implements a subset of the HC08 instruction set with added BGND instruction and a single global interrupt vector. Its clock system combines an internal frequency-locked-loop (FLL) with precision-trimmed reference (0.2% resolution, 2% deviation over voltage/temperature) and external crystal/ceramic oscillator support (31.25 kHz–16 MHz).

System protection includes COP reset with dedicated 1 kHz low-power oscillator, low-voltage detection with reset/interrupt, illegal opcode/address detection, and flash-block protection. Power management supports Wait (clocks active) and Stop (clocks halted) modes, with wakeup sources including RTI, KBI, ADC, ACMP, SCI, and LVD.

Key Specifications

Pinout & Package

MC9RS08KB2CDC is housed in an 8-pin DFN package (Case 1452-02), measuring 2.0 mm × 2.0 mm × 0.55 mm, with exposed thermal pad for enhanced heat dissipation. The package uses copper wire bonding per Freescale's QFN migration addendum (Rev. 0, 07/2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9RS08KB2CP and MC9RS08KA2, the MC9RS08KB2CDC delivers optimal balance of analog integration (ADC/ACMP), debug capability (BKGD), and modern copper-wire packaging - making it the preferred choice for new designs requiring sensor interfacing in compact industrial or medical devices.

Availability

MC9RS08KB2CDC is available at Aetrix Electronics and suitable for smart sensor nodes, industrial actuator controllers, and consumer appliance subsystems requiring stable component supply, long-term lifecycle support, and consistent copper-wire packaging compliance.

Supply support for MC9RS08KB2CDC 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 fabless semiconductor company specializing in microcontrollers, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The MC9RS08KB2CDC belongs to the RS08 family - designed specifically for ultra-low-cost, ultra-low-power embedded control in space-constrained applications where minimal pin count, integrated analog, and single-wire debug are essential.

FAQ

What is the maximum operating frequency of the MC9RS08KB2CDC?

The MC9RS08KB2CDC achieves a maximum bus frequency of 10 MHz using its internal frequency-locked-loop (FLL) with precision-trimmed reference. This is confirmed in the datasheet Rev. 5, Section "Clock Source Options", and applies across the full operating voltage range (1.8–5.5 V) and temperature range (–40 to 85 °C). The MC9RS08KB2CDC does not support external clock frequencies above 10 MHz for bus operation.

Does the MC9RS08KB2CDC support analog-to-digital conversion?

Yes, the MC9RS08KB2CDC includes a 10-bit, 12-channel ADC with 2.5 μs conversion time, internal temperature sensor (1.7 mV/°C), bandgap reference channel, and automatic compare function. Crucially, the ADC remains operational in Stop mode - enabling low-power wake-up on analog thresholds. This functionality is documented in the "Peripherals" section of the MC9RS08KB12 Series Data Sheet, Rev. 5.

What debug interface does the MC9RS08KB2CDC provide?

The MC9RS08KB2CDC features a single-wire background debug (BKGD) interface, supporting in-circuit debugging and flash programming through the PTA4 pin. It includes breakpoint capability for single breakpoint setting during development. This interface is standardized across the RS08 family and requires only one dedicated pin - significantly reducing test infrastructure complexity compared to multi-pin JTAG solutions.

What package type and dimensions does the MC9RS08KB2CDC use?

The MC9RS08KB2CDC is supplied in an 8-pin DFN package (Case 1452-02), measuring 2.0 mm × 2.0 mm × 0.55 mm with an exposed thermal pad. It uses copper-wire bonding per Freescale's QFN Addendum (Rev. 0, 07/2014), replacing earlier gold-wire variants. Thermal resistance is θJA = 110 °C/W, as specified in Table 4 of the datasheet Rev. 5.

How does the MC9RS08KB2CDC handle low-voltage conditions?

The MC9RS08KB2CDC incorporates low-voltage detection (LVD) with programmable reset or interrupt generation. The falling threshold is 1.80–1.86 V and rising threshold is 1.88–1.95 V (Table 7, Rev. 5). It also supports RAM retention down to 0.81 V, allowing critical data preservation during brown-out. These features prevent undefined behavior during power ramp-up or sag - a key requirement for reliable operation in battery- or line-powered equipment.