NXP Semiconductors MC9S08LL16CLF

Overview

MC9S08LL16CLF from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller designed for ultra-low-power LCD-based applications. It features 16 KB dual-array Flash, 2.08 KB RAM, 12-bit ADC with temperature sensor, analog comparator, I²C, SPI, SCI, two 2-channel TPMs, TOD module, and integrated 8×24 LCD driver with internal charge pump and voltage regulation. It operates from 1.8 V to 3.6 V across –40°C to +85°C and supports stop3 mode with 400 nA typical current.

For engineers reviewing the MC9S08LL16CLF datasheet, MC9S08LL16CLF pinout, MC9S08LL16CLF application, or MC9S08LL16CLF equivalent, key selection criteria include its QFN-48 package with exposed pad, 38 GPIOs (including LCD segment/backplane drivers), sub-1 μA stop3 power consumption, integrated low-power oscillator for RTC wake-up, and single-wire background debug interface for space-constrained embedded designs.

Technical Context

The MC9S08LL16CLF implements the HCS08 CPU core with BGND instruction support and handles up to 32 interrupt/reset sources. Its internal clock source (ICS) uses a frequency-locked loop (FLL) with factory-trimmed internal reference (±0.2% resolution, ±2% deviation over voltage/temperature), enabling bus frequencies from 1 MHz to 10 MHz without external crystal.

System-level timing relies on multiple clock domains: external crystal/ceramic resonator (31.25 kHz–16 MHz), internal FLL, and dedicated 1 kHz low-power oscillator for TOD and stop3 wake-up. Peripheral clock gating allows selective module disablement to reduce active current, while security circuitry prevents unauthorized access to Flash and RAM contents.

Key Specifications

Pinout & Package

MC9S08LL16CLF is housed in a 7 mm × 7 mm, 0.5 mm pitch, 48-pin QFN package (case outline 98ASA00466D) with exposed thermal pad. The package supports copper-wire bonding per Freescale QFN migration addendum (Rev. 0, July 2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08LG32CLH, the MC9S08LL16CLF offers identical peripheral compatibility in a thermally superior QFN-48 package but with half the Flash capacity; compared with S9KEAZ128AMLH, it provides proven low-power LCD control with minimal code size and legacy toolchain support, at the cost of architectural obsolescence.

Availability

MC9S08LL16CLF is available at Aetrix Electronics and suitable for smart metering, industrial HMIs, portable medical devices, and home appliance control panels requiring stable component supply, long-term lifecycle support, and verified QFN-48 manufacturability.

Supply support for MC9S08LL16CLF 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 company formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08LL16CLF belongs to NXP's legacy HCS08 microcontroller family, engineered specifically for ultra-low-power, LCD-integrated embedded control in cost-sensitive, battery-operated applications such as utility meters and consumer appliances.

FAQ

What is the maximum operating frequency of the MC9S08LL16CLF CPU core?

The MC9S08LL16CLF CPU core operates at up to 20 MHz when supplied at 3.6 V across the full temperature range (–40°C to +85°C). Bus frequency is derived from the internal clock source (ICS) or external oscillator; the ICS supports bus frequencies from 1 MHz to 10 MHz with factory-trimmed accuracy. The core's actual execution speed depends on the selected clock source and configuration - for example, FEI mode at 8 MHz bus yields ~8 million instructions per second.

Does the MC9S08LL16CLF support debugging during operation?

Yes, the MC9S08LL16CLF supports real-time in-circuit debugging via its single-wire background debug (BKGD) interface on PTC6. This interface enables breakpoint setting, memory inspection, register read/write, and program execution control without halting the entire system. The on-chip ICE debug module includes three comparators, nine trigger modes, and an eight-deep FIFO for change-of-flow tracing - all accessible through standard Freescale Codewarrior or compatible debug tools.

Can the MC9S08LL16CLF drive a 4×28 LCD configuration?

Yes, the MC9S08LL16CLF supports both 4×28 and 8×24 LCD configurations. In 4×28 mode, it uses four backplane outputs (driven by PTD/PTE pins) and 28 segment outputs (from PTA/PTC/PTD/PTE), fully utilizing its integrated LCD driver with internal charge pump and regulated VLCD output. The configuration is software-selectable via LCD control registers, and contrast is adjustable using the internal bandgap reference trimming feature.

What is the lowest supply current achievable in stop mode for the MC9S08LL16CLF?

The MC9S08LL16CLF achieves a typical supply current of 400 nA in stop3 mode (no clocks active) at 3.0 V and 25°C, with a maximum of 1.03 μA over temperature. This ultra-low quiescent current is enabled by complete clock gating, retention of RAM and register states, and operation of the dedicated 1 kHz low-power oscillator for TOD wake-up - making it suitable for decade-long battery operation in metering applications.

Is the MC9S08LL16CLF pin-compatible with other MC9S08LL series devices?

Yes, the MC9S08LL16CLF is pin-compatible with the MC9S08LL8 in the same 48-pin QFN package (98ASA00466D), sharing identical pin assignments, electrical characteristics, and peripheral mapping. Differences are limited to Flash size (16 KB vs. 8 KB) and RAM layout - allowing hardware reuse across variants. However, it is not pin-compatible with 64-pin LQFP versions of the LL16, which expose additional LCD segment pins (LCD16–LCD29) not present in the QFN-48 footprint.