NXP Semiconductors MC9S08LL8CLF

Overview

MC9S08LL8CLF from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller designed for ultra-low-power LCD-based embedded control. It features 10,240 bytes of dual-array FLASH, 2080 bytes of RAM, 8-channel 12-bit ADC with temperature sensor, and integrated 4×28/8×16 LCD driver with internal charge pump - all operating from 1.8 V to 3.6 V across –40°C to +85°C. It targets battery-powered metering and portable HMI applications.

For engineers reviewing the MC9S08LL8CLF datasheet, MC9S08LL8CLF pinout, MC9S08LL8CLF application, or MC9S08LL8CLF equivalent, key selection criteria include its 48-pin QFN package, stop3-mode current of 400–8000 nA, 16 kHz low-power oscillator support, single-wire background debug interface, and compatibility with Freescale's S08 architecture toolchain and CodeWarrior IDE.

Technical Context

The MC9S08LL8CLF implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources and bus frequencies from 1 MHz to 10 MHz via its internal clock source (ICS) with FLL and factory-trimmed reference (±2% over voltage/temperature). Its power management includes two stop modes, reduced-power wait, and peripheral clock gating.

It integrates analog peripherals including a 12-bit ADC with 2.5 μs conversion time and operation in stop3 mode, an analog comparator with bandgap reference and edge-triggered interrupts, and a Time-of-Day (TOD) module with 1 kHz low-power oscillator for calendar/timekeeping without external components.

Key Specifications

Pinout & Package

MC9S08LL8CLF is housed in a 48-pin QFN package (98ASA00466D) with exposed thermal pad, measuring 7 mm × 7 mm × 0.85 mm. Pin assignments follow the 48-pin QFN/LQFP layout defined in Figure 3 of MC9S08LL16 Series Data Sheet Rev. 7.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08LL8CLF, MC9S08LL16CLF offers more FLASH and identical LCD/peripheral capability in the same 48-QFN package, while S9KEAZ128AMLH provides ARM-class performance at the cost of LCD integration and increased BOM complexity.

Availability

MC9S08LL8CLF is available at Aetrix Electronics and suitable for smart metering, portable medical devices, industrial HMI panels, and home appliance user interfaces requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08LL8CLF 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, scalable solutions for automotive, industrial, IoT, and communication infrastructure markets.

The MC9S08LL8CLF belongs to the S08LL ultra-low-power microcontroller family, engineered specifically for battery-operated LCD-based applications demanding extended runtime, high analog integration, and robust EMC performance in harsh environments.

FAQ

What is the maximum operating frequency of the MC9S08LL8CLF?

The MC9S08LL8CLF supports a maximum bus frequency of 10 MHz when using its internal clock source (ICS) with FLL enabled. At 3.6 V, the HCS08 CPU can operate up to 20 MHz - however, the documented maximum bus frequency remains 10 MHz per the MC9S08LL16 Series Data Sheet Rev. 7. This limitation ensures timing compliance across all peripherals including ADC, TPM, and SCI modules. The MC9S08LL8CLF achieves this using factory-trimmed internal reference with ±2% accuracy over voltage and temperature.

Does the MC9S08LL8CLF support debugging during development?

Yes, the MC9S08LL8CLF includes a single-wire background debug (BKGD) interface on PTC6, enabling in-circuit debugging via standard BDM tools. It supports one hardware breakpoint during active debugging plus two additional breakpoints in the on-chip debug module. The integrated ICE module provides eight-deep FIFO for flow-address capture and nine trigger modes, allowing full visibility into program execution without requiring dedicated debug pins beyond BKGD. This capability is fully supported by CodeWarrior Development Studio for HCS08.

What LCD configurations does the MC9S08LL8CLF support?

The MC9S08LL8CLF supports two LCD configurations: 4×28 segments (4 commons, 28 segments) or 8×16 segments (8 commons, 16 segments), implemented using its integrated LCD driver with internal charge pump. It provides an internally regulated LCD reference voltage (VLCD) that can be trimmed in software for optimal contrast control. Unlike the MC9S08LL16 variant, the MC9S08LL8CLF does not support 8×24 or 4×20 layouts - its segment mapping is limited to the 4×28/8×16 options as confirmed in Table 1 of the MC9S08LL16 Series Data Sheet Rev. 7.

How does the MC9S08LL8CLF manage power in battery-operated systems?

The MC9S08LL8CLF employs multiple hardware-level power-saving mechanisms: stop3 mode draws as low as 400 nA at –40°C; a dedicated 1 kHz low-power oscillator enables RTC functionality without external components; peripheral clock gating disables unused modules; and low-power run/wait modes allow selective peripheral operation while the voltage regulator remains in standby. Its 1.8–3.6 V operating range and RAM retention down to 0.6 V further extend usable battery life in primary-cell and coin-cell applications.

Is the MC9S08LL8CLF pin-compatible with other S08LL series devices?

Yes, the MC9S08LL8CLF is pin-compatible with the MC9S08LL16CLF in the 48-pin QFN package (98ASA00466D), sharing identical pin assignments, electrical characteristics, and peripheral mappings. Both devices use the same 48-QFN footprint and support identical I/O configurations, LCD driver modes, and debug interface. However, MC9S08LL16CLF adds TPM2 functionality on PTC4/PTC5 - these pins default to GPIO in MC9S08LL8CLF and must be treated as no-connect in shared PCB designs unless TPM2 is required.