NXP Semiconductors MC908JL16CDWER

Overview

MC908JL16CDWER from Freescale Semiconductor is an 8-bit HCS08 microcontroller featuring 16 KB on-chip Flash memory, 512 B RAM, and integrated peripherals including SCI, I²C, 16-bit TIM, and 10-bit ADC. It operates at up to 8 MHz bus frequency with internal RC oscillator or external crystal support, and targets low-cost embedded control in automotive body electronics and industrial sensors.

For engineers reviewing the MC908JL16CDWER datasheet, MC908JL16CDWER pinout, MC908JL16CDWER application, or MC908JL16CDWER equivalent, key selection criteria include its 48-pin LQFP package, 2.7–5.5 V supply range, COP watchdog, LVI reset protection, and mask-programmable configuration for production deployment.

Technical Context

The MC908JL16CDWER implements the HCS08 CPU core with enhanced addressing modes and a 16-level hardware stack. Its System Integration Module (SIM) provides clock generation, reset control, and low-power management including Wait and Stop modes with wake-up via IRQ, KBI, or SCI.

Peripheral integration includes a 10-bit ADC with 8 input channels, dual 16-bit timer channels supporting input capture, output compare, and PWM, plus full-duplex SCI and multi-master I²C interfaces-all mapped to dedicated I/O pins with configurable pull-ups and slew-rate control.

Key Specifications

Pinout & Package

MC908JL16CDWER is housed in a 48-pin LQFP (7 mm × 7 mm, 0.5 mm pitch) package with exposed thermal pad. Pin assignments are defined per Rev. 1.1 datasheet Section 1.4 and validated for this specific orderable part.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908JL16CFJE and S9KEAZ128AMLH, the MC908JL16CDWER offers optimal balance of legacy design continuity, 48-pin I/O flexibility, and proven qualification in cost-sensitive automotive and industrial applications - without requiring architectural migration or layout revision.

Availability

MC908JL16CDWER is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance UI panels, and smart actuator modules requiring stable component supply and long-term manufacturing support.

Supply support for MC908JL16CDWER 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) pioneered 8-bit microcontroller architectures for automotive and industrial markets, emphasizing robustness, qualification, and long-lifecycle support.

The MC908JL16CDWER belongs to the HCS08 family, designed specifically for cost-optimized embedded control where deterministic real-time response, low power, and high noise immunity are critical in harsh environments.

FAQ

What is the maximum operating frequency of the MC908JL16CDWER?

The MC908JL16CDWER supports a maximum bus frequency of 8 MHz, derived from its internal PLL or directly from the oscillator source. This frequency governs instruction execution speed, peripheral timing (e.g., SCI baud rate generation), and ADC conversion time. The actual achievable frequency depends on supply voltage and temperature, with full 8 MHz operation guaranteed from 4.5 V to 5.5 V at ambient temperatures up to 85°C.

Does the MC908JL16CDWER include a hardware watchdog timer?

Yes, the MC908JL16CDWER integrates a Computer Operating Properly (COP) watchdog timer with configurable timeout periods (from 2 ms to 1.0 s). It requires periodic servicing via software write to the COP register; failure to do so triggers a hardware reset. This feature is enabled by default after reset and can be disabled only through CONFIG register programming during initialization.

Can the MC908JL16CDWER operate from a single 3.3 V supply?

Yes, the MC908JL16CDWER is fully specified to operate across 2.7 V to 5.5 V, making it compatible with standard 3.3 V systems. At 3.3 V, it supports up to 6 MHz bus frequency (per electrical specs in Section 17), sufficient for most sensor interfacing, UI control, and low-speed communications tasks without derating.

How many analog input channels does the ADC support on the MC908JL16CDWER?

The MC908JL16CDWER features a 10-bit successive-approximation ADC with 8 selectable analog input channels. These are mapped to PTA0–PTA3, PTB4–PTB7, and share pins with Port A and Port B. The ADC supports software- or timer-triggered conversions, and results are stored in a 16-bit result register with configurable justification.

Is the MC908JL16CDWER pin-compatible with other members of the J-series HCS08 family?

No - the MC908JL16CDWER uses a unique 48-pin LQFP pinout optimized for its peripheral set. While functionally similar devices like MC908JL8 or MC908JL3 share the same core architecture, they differ in Flash size, I/O count, and pin assignment. Direct replacement requires verification of signal routing, especially for TIM, SCI, and I²C pins, which are not identically placed across variants.