NXP Semiconductors S9S08EL32F1MTL

Overview

S9S08EL32F1MTL from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB on-chip FLASH, 2 KB RAM, and 1 KB EEPROM. It features a 40-MHz CPU, 16-channel 10-bit ADC with temperature sensor, dual analog comparators, LIN-capable SLIC, and real-time counter. Used in automotive body electronics and industrial control nodes requiring low-power operation and LIN bus integration.

For engineers reviewing the S9S08EL32F1MTL datasheet, S9S08EL32F1MTL pinout, S9S08EL32F1MTL application, or S9S08EL32F1MTL equivalent, key selection criteria include its 28-TSSOP package, stop3-mode operation with ADC/ACMP active, LIN 2.0 protocol support via SLIC, and background debug interface for in-circuit development.

Technical Context

The S9S08EL32F1MTL implements the HCS08 CPU core with HC08 instruction set plus BGND, supporting 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 2–20 MHz.

Peripherals include a dedicated Slave LIN Interface Controller (SLIC) compliant with LIN 2.0 and SAE J2602, supporting up to 120 kbps with full message buffering and automatic checksum generation. The ADC operates in stop3 mode with 2.5 μs conversion time and internal bandgap reference, while two ACMPs support routing to TPM for event-triggered PWM.

Key Specifications

Pinout & Package

Package: 28-pin Thin Shrink Small Outline Package (28-TSSOP), 0.65 mm pitch, body size 9.7 × 4.4 mm, lead count 28, exposed pad not present.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08EL16F1MTL, S9S08EL32F1MTL provides double FLASH and RAM for larger control algorithms and EEPROM for robust configuration storage; versus S9S08SG48F1MTL, it trades package size and peripheral count for lower cost and proven qualification in legacy automotive platforms.

Availability

S9S08EL32F1MTL is available at Aetrix Electronics and suitable for automotive body electronics, industrial LIN sensor networks, and smart actuator control systems requiring stable component supply and long-term lifecycle support.

Supply support for S9S08EL32F1MTL 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, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The S9S08EL32F1MTL belongs to NXP's legacy HCS08 microcontroller family, designed specifically for cost-sensitive, low-power automotive body electronics and industrial control nodes requiring LIN protocol compliance and robust flash memory reliability.

FAQ

What is the maximum operating frequency of the S9S08EL32F1MTL CPU core?

The S9S08EL32F1MTL CPU core is rated for a maximum bus frequency of 20 MHz, derived from its internal clock source (ICS) with frequency-locked loop (FLL). While the HCS08 architecture supports up to 40 MHz in certain configurations, the S9S08EL32F1MTL datasheet specifies 20 MHz as the maximum guaranteed bus frequency under full temperature and voltage range. This ensures timing compliance for all on-chip peripherals including ADC, SLIC, and TPM modules.

Does the S9S08EL32F1MTL support LIN 2.0 protocol natively?

Yes, the S9S08EL32F1MTL includes a dedicated Slave LIN Interface Controller (SLIC) module that implements LIN 2.0 and SAE J2602 protocol layers in hardware. It handles frame synchronization, automatic bit rate detection, checksum generation and verification, and full message buffering-without CPU intervention. This native support enables deterministic, low-latency LIN communication essential for automotive body electronics applications.

Can the S9S08EL32F1MTL operate its ADC in low-power stop modes?

Yes, the S9S08EL32F1MTL ADC remains fully operational in stop3 mode-the deepest low-power state. It supports 2.5 μs conversion time, automatic compare function, and use of the internal bandgap reference channel while consuming minimal current. This capability allows battery-powered LIN nodes to perform periodic sensor measurements and wake the CPU only upon threshold violation, significantly extending operational lifetime.

What debug interface does the S9S08EL32F1MTL provide?

The S9S08EL32F1MTL features a single-wire background debug (BDM) interface compliant with the Freescale/NXP BDM specification. It supports in-circuit debugging with one hardware breakpoint, plus two additional breakpoints managed by the on-chip debug module. The integrated ICE module includes two comparators, nine trigger modes, and an eight-deep FIFO for change-of-flow address capture-enabling robust firmware validation and real-time trace in resource-constrained environments.

Is the S9S08EL32F1MTL pin-compatible with other MC9S08EL-series devices?

Yes, the S9S08EL32F1MTL in 28-TSSOP package is pin-compatible with MC9S08EL16F1MTL and MC9S08SL16F1MTL within the same package variant. All share identical pin assignments, electrical characteristics, and peripheral mapping-including SLIC, ADC, TPM, and I/O functionality. This allows direct substitution in existing designs when increased FLASH or EEPROM capacity is required, without PCB layout changes.