NXP Semiconductors MCR908JK1ECDWER

Overview

MCR908JK1ECDWER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller featuring 1 KB on-chip FLASH, 64 bytes RAM, and a 20-pin SOIC package. It integrates a 10-bit ADC with 4 input channels, a 16-bit TIM module with input capture/output compare/PWM, and supports crystal or internal RC oscillator operation at up to 8 MHz bus frequency. It targets low-cost embedded control in appliance motor interfaces and industrial sensor nodes.

For engineers reviewing the MCR908JK1ECDWER datasheet, MCR908JK1ECDWER pinout, MCR908JK1ECDWER application, or MCR908JK1ECDWER equivalent, key selection criteria include its 1 KB FLASH size, 20-pin SOIC thermal profile, 10-bit ADC resolution with 4-channel multiplexing, and support for both crystal and RC clock sources without external components.

Technical Context

The MCR908JK1ECDWER implements the HCS08 CPU core with 52-instruction set, 8-level hardware stack, and low-power Wait/Stop modes. Its System Integration Module (SIM) provides bus clock generation, reset control, interrupt management, and COP watchdog supervision.

It includes a 16-bit Timer Interface Module (TIM) supporting unbuffered/buffered output compare, PWM generation with programmable period and duty cycle, and input capture with edge-selectable triggering. The ADC subsystem operates independently of CPU execution and supports single-shot or continuous conversion modes.

Key Specifications

Pinout & Package

Package: 20-pin Small Outline Integrated Circuit (SOIC), 0.300-inch body width, JEDEC MS-013AC standard, surface-mount compatible with standard reflow profiles.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCR908JK1ECDWER, MC908JK1ECDWE offers identical functionality in a through-hole package for manual assembly, while MCR908JK3ECDWER provides scalable memory and peripherals within the same SOIC footprint-enabling design reuse and migration paths without board redesign.

Availability

MCR908JK1ECDWER is available at Aetrix Electronics and suitable for appliance motor control, industrial sensor nodes, consumer remote controls, and smart power outlets requiring stable component supply across extended product lifecycles.

Supply support for MCR908JK1ECDWER 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Freescale's embedded controller heritage.

The MCR908JK1ECDWER belongs to the HCS08 family-designed specifically for cost-sensitive, low-power embedded control tasks where small code size, minimal external components, and robustness under voltage variation are critical.

FAQ

What is the maximum operating frequency of the MCR908JK1ECDWER?

The MCR908JK1ECDWER supports a maximum bus frequency of 8 MHz, achievable using either the internal RC oscillator (calibrated to ±2% over temperature) or an external crystal up to 8 MHz. This frequency determines instruction execution speed and peripheral timing resolution, such as PWM duty-cycle granularity and ADC conversion rate.

Does the MCR908JK1ECDWER include a built-in debug interface?

Yes, the MCR908JK1ECDWER integrates a hardware Break Module that supports single-step execution, breakpoint address matching, and CPU register visibility during development. It works with standard BDM (Background Debug Mode) tools and does not require external JTAG hardware, reducing debug setup complexity.

Can the MCR908JK1ECDWER operate from a 3.3 V supply?

Yes, the MCR908JK1ECDWER is fully specified for operation from 2.7 V to 5.5 V, making it compatible with 3.3 V systems. At 3.3 V, it maintains full functionality including 8 MHz bus speed, ADC performance, and I/O drive strength-enabling direct interfacing with 3.3 V sensors and communication ICs.

How many analog input channels does the ADC support on the MCR908JK1ECDWER?

The MCR908JK1ECDWER features a 10-bit ADC with four dedicated analog input channels (AD0–AD3), mapped to PTD0–PTD3 pins. These channels support single-ended measurements referenced to VSS and VDD, with typical INL of ±1 LSB and conversion time of 25 µs per sample at maximum speed.

Is the MCR908JK1ECDWER pin-compatible with other members of the JK1 family?

Yes, all 20-pin SOIC variants of the JK1 family-including MCR908JK1ECDWER, MC908JK1ECDWE, and MCR908JK1ECDW-share identical pin assignments and electrical characteristics. This allows drop-in replacement between packages (SOIC vs PDIP) and simplifies board design reuse across production and evaluation platforms.