NXP Semiconductors MC908JL3ECDWE

Overview

MC908JL3ECDWE from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller featuring 4 KB flash memory, 192 B RAM, and integrated 8-channel 8-bit ADC. It operates at up to 8 MHz bus frequency with on-chip oscillator, COP watchdog, LVI, and KBI for low-power keyboard wake-up - deployed in industrial sensor nodes and appliance control panels.

For engineers reviewing the MC908JL3ECDWE datasheet, MC908JL3ECDWE pinout, MC908JL3ECDWE application, or MC908JL3ECDWE equivalent, key selection criteria include its 20-pin SOIC package, 5 V operation, 8-bit ADC resolution, COP timeout configurability, and support for Wait/Stop low-power modes in embedded control designs.

Technical Context

The MC908JL3ECDWE implements the HCS08 CPU core with 16-bit address space, supporting indexed, extended, and relative addressing. Its System Integration Module (SIM) provides clock generation, reset control, interrupt management, and low-power mode coordination across Wait and Stop states.

It integrates a Timer Interface Module (TIM) with input capture, output compare, and PWM generation, plus a Keyboard Interrupt Module (KBI) enabling wake-from-Stop via configurable port pins - all synchronized to the internal bus clock derived from either crystal or RC oscillator.

Key Specifications

Pinout & Package

MC908JL3ECDWE is housed in a 20-pin Small Outline Integrated Circuit (SOIC) package with 0.300-inch body width and standard JEDEC MS-013AC footprint - compatible with automated SMT assembly and reflow profiles for industrial PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908JK3ECDWE, the MC908JL3ECDWE adds essential ADC capability and 1 KB extra flash for sensor-based logic; versus MC908JL8ECDWE, it trades memory headroom for lower unit cost while retaining identical peripheral set and pin compatibility.

Availability

MC908JL3ECDWE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance control panels, and smart power outlets requiring stable component supply over multi-year production cycles.

Supply support for MC908JL3ECDWE 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.

The MC908JL3ECDWE belongs to the legacy HCS08 microcontroller family designed for cost-sensitive, low-power embedded control in appliances, industrial equipment, and consumer electronics.

FAQ

What is the maximum operating frequency of the MC908JL3ECDWE?

The MC908JL3ECDWE supports a maximum bus frequency of 8 MHz, derived from its internal oscillator circuit - achievable with either external crystal (up to 8 MHz) or on-chip RC oscillator calibrated to ±2% accuracy. This frequency sets the timing base for all CPU instructions and peripheral modules including TIM and ADC.

Does the MC908JL3ECDWE include an analog-to-digital converter?

Yes, the MC908JL3ECDWE integrates an 8-bit successive approximation ADC with 8 input channels. Inputs are multiplexed from Port A and Port D pins, and conversion time is software-configurable between 16 and 256 bus cycles - enabling flexible trade-offs between speed and resolution in sensor acquisition routines.

How does the Computer Operating Properly (COP) watchdog function on the MC908JL3ECDWE?

The COP module in the MC908JL3ECDWE is a windowed watchdog timer with four selectable timeout periods (0.5 ms, 2 ms, 8 ms, or 1 s). It requires periodic service via write to the COPCTL register; failure to do so within the selected window triggers a hardware reset - preventing software lockup in safety-critical control loops.

What low-power modes does the MC908JL3ECDWE support, and how are they exited?

The MC908JL3ECDWE supports Wait and Stop low-power modes. Wait mode halts the CPU while keeping clocks active for peripherals; exit occurs on any interrupt. Stop mode disables all clocks except those needed for wake-up sources like IRQ, KBI, or COP timeout - exited by configured event, then restoring full operation after reset vector fetch.

Is the MC908JL3ECDWE pin-compatible with other members of the HCS08 JL series?

Yes, the MC908JL3ECDWE shares identical 20-pin SOIC pinout with MC908JL8ECDWE and MC908JL1ECDWE - enabling drop-in replacement where increased flash or RAM is required. Pin functions, electrical characteristics, and peripheral mappings remain consistent across this package variant within the JL family.