NXP Semiconductors MC908JL3EMDWE

Overview

MC908JL3EMDWE from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller featuring 4 KB FLASH, 192 B RAM, 8-channel 8-bit ADC, and integrated TIM module with PWM and input capture. It operates at up to 8 MHz bus frequency, supports 2.7–5.5 V supply, and targets low-cost embedded control in industrial sensors and appliance motor interfaces.

For engineers reviewing the MC908JL3EMDWE datasheet, MC908JL3EMDWE pinout, MC908JL3EMDWE application, or MC908JL3EMDWE equivalent, key selection criteria include its 20-pin SOIC package, on-chip COP watchdog, LVI brownout protection, and Monitor ROM-based in-system programming capability.

Technical Context

The MC908JL3EMDWE implements the HCS08 CPU core with 16-bit address space, supporting indexed, extended, and relative addressing modes. Its System Integration Module (SIM) provides clock generation from internal RC or external crystal oscillator, configurable reset sources (POR, COP, LVI), and interrupt prioritization across 12 vector locations.

Peripheral integration includes a 16-bit Timer Interface Module (TIM) with two independent channels supporting input capture, output compare, and buffered/unbuffered PWM; plus a Keyboard Interrupt Module (KBI) for matrix scanning and an Analog-to-Digital Converter (ADC) with software-triggered conversions and interrupt-on-complete operation.

Key Specifications

Pinout & Package

MC908JL3EMDWE is housed in a 20-pin Small Outline Integrated Circuit (SOIC) package with 0.300-inch body width and standard JEDEC MS-013AC footprint. Pin pitch is 0.050 inch (1.27 mm), compatible with automated SMT assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908JK3ECDWE, MC908JL3EMDWE adds essential analog and human-interface peripherals at minimal cost premium; versus S9KEAZ128AMLH, it offers proven reliability and lower BOM cost for fixed-function embedded roles where ARM overhead is unnecessary.

Availability

MC908JL3EMDWE is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance motor controllers, smart power outlets, and basic industrial PLC I/O modules requiring stable component supply over extended production lifecycles.

Supply support for MC908JL3EMDWE 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 delivering secure, energy-efficient, and intelligent solutions for automotive, industrial, IoT, mobile, and communication infrastructure markets.

The MC908JL3EMDWE belongs to the legacy HCS08 microcontroller family designed for cost-sensitive, low-power embedded control applications where deterministic real-time response and long-term supply stability are critical.

FAQ

What is the maximum operating frequency of the MC908JL3EMDWE?

The MC908JL3EMDWE supports a maximum bus frequency of 8 MHz at 5 V supply. This is achieved using the internal oscillator or an external crystal up to 8 MHz, with the System Integration Module (SIM) dividing the source clock as needed. The actual core instruction execution rate depends on the bus frequency and instruction cycle count, with most instructions completing in 1–3 bus cycles.

Does the MC908JL3EMDWE support in-system programming without external hardware?

Yes, the MC908JL3EMDWE includes a 256-byte Monitor ROM that enables in-system programming via UART using standard terminal commands. This allows full FLASH read, write, and erase operations directly through the serial interface without requiring a dedicated programmer, simplifying development and field firmware updates for MC908JL3EMDWE-based systems.

What ADC capabilities does the MC908JL3EMDWE provide?

The MC908JL3EMDWE integrates an 8-bit successive-approximation ADC with eight input channels, selectable reference voltages (VDD or internal bandgap), and conversion times as fast as 12 μs. It supports single-shot and continuous conversion modes, with interrupt generation upon completion, making it suitable for periodic sensor sampling in MC908JL3EMDWE applications.

How does the Computer Operating Properly (COP) watchdog function on the MC908JL3EMDWE?

The COP watchdog in the MC908JL3EMDWE is a free-running timer with four selectable timeout periods (0.5 ms, 2 ms, 8 ms, or 1.0 s). It must be periodically cleared by firmware writing to the COPCTL register; failure to do so triggers a hardware reset. This ensures MC908JL3EMDWE recovers automatically from software lockups or infinite loops in safety-critical embedded environments.

What packaging and compliance information applies to the MC908JL3EMDWE?

The MC908JL3EMDWE is supplied in a 20-pin SOIC package (MDWE suffix) compliant with RoHS Directive 2011/65/EU and halogen-free standards. It meets JEDEC MS-013AC mechanical specifications, with 1.27 mm pin pitch and 7.5 mm body width, ensuring compatibility with standard SMT reflow profiles and automated assembly equipment used for MC908JL3EMDWE production.