NXP Semiconductors MC9S08LH64CLK

Overview

MC9S08LH64CLK from NXP (formerly Freescale) is an automotive-grade 8-bit HCS08 microcontroller with 64 KB flash, 4 KB RAM, and integrated LCD driver supporting up to 8×36 segments. It operates at up to 40 MHz (at 3.6 V), features dual-array flash for safe firmware updates, and includes a 16-bit ADC with temperature sensor and differential input-designed for instrument cluster and body control modules in vehicles.

For engineers reviewing the MC9S08LH64CLK datasheet, MC9S08LH64CLK pinout, MC9S08LH64CLK application, or MC9S08LH64CLK equivalent, key selection considerations include its 64-pin LQFP package, stop3-mode wakeup time of 6 μs, 1.15 V trimmable VREFO2 reference output, and AEC-Q100 qualification for automotive environments.

Technical Context

The MC9S08LH64CLK 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 precision-trimmed internal reference (±0.2% resolution, ±2% deviation over voltage/temperature), enabling bus frequencies from 1 MHz to 20 MHz.

Power management includes two low-power stop modes, reduced-power wait mode, and peripheral clock gating. The very low-power external oscillator supports accurate time-of-day (TOD) operation in stop2/stop3 modes, while the 6 μs typical wakeup from stop3 ensures responsive real-time behavior in battery-sensitive applications.

Key Specifications

Pinout & Package

MC9S08LH64CLK is housed in a 64-pin LQFP (10 mm × 10 mm, case 840F) with 39 GPIOs (including two output-only pins) and dedicated LCD segment drivers (LCD[0:43]). VREFO2 is available only on this 64-pin variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08LH64F1MLC and MC9S08LC60CLK, the MC9S08LH64CLK uniquely balances display integration, low-power timing capability (TOD + stop3), and AEC-Q100 compliance in a compact 64-pin footprint-making it optimal for space-constrained instrument clusters.

Availability

MC9S08LH64CLK is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and smart HVAC panels requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for MC9S08LH64CLK 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 markets, with deep heritage in microcontrollers from its acquisition of Freescale.

The MC9S08LH64CLK belongs to the HCS08-based LH-series, designed specifically for cost-effective, low-power automotive body electronics and instrumentation-emphasizing integrated LCD, robust analog peripherals, and AEC-Q100 reliability.

FAQ

What is the maximum operating frequency of the MC9S08LH64CLK?

The MC9S08LH64CLK achieves up to 40 MHz CPU operation at 3.6 V within the –40 °C to +85 °C temperature range. At lower voltages (2.1 V to 1.8 V), the maximum frequency reduces to 20 MHz. This scaling ensures deterministic timing across automotive supply variations while maintaining compatibility with legacy HCS08 toolchains and instruction set.

Does the MC9S08LH64CLK support in-circuit debugging?

Yes, the MC9S08LH64CLK includes a single-wire background debug (BKGD) interface on PTC6, enabling full in-circuit emulation via Freescale's BDM protocol. It supports one hardware breakpoint during active debugging plus two additional breakpoints in the on-chip debug module, allowing efficient code validation without external JTAG hardware.

What LCD configurations does the MC9S08LH64CLK support?

The MC9S08LH64CLK supports two LCD configurations: 8 common × 36 segment or 4 common × 40 segment, using dedicated LCD[0:43] pins. It integrates a charge pump for voltage boosting and a trimmable internal reference (VREFO2) for contrast control-eliminating external bias components and simplifying display subsystem design.

Is the MC9S08LH64CLK qualified for automotive use?

Yes, the MC9S08LH64CLK is AEC-Q100 qualified for Grade 2 (–40 °C to +105 °C junction) and specified for –40 °C to +85 °C ambient operation. It meets ESD (±2000 V HBM, ±500 V CDM) and latch-up (±100 mA) requirements per automotive standards, and includes system-level protections such as COP watchdog, LVD, and flash block protection.

How does the MC9S08LH64CLK manage power in low-energy modes?

The MC9S08LH64CLK offers multiple low-power modes including stop2 and stop3. In stop3, the CPU and most clocks halt while RAM, ADC, ACMP, TOD, and VREFO2 remain active-with 6 μs typical wakeup. Peripheral clock gating and a very low-power external oscillator further reduce current draw, enabling sub-μA retention in battery-backed systems.