NXP Semiconductors MC9S08SE8CTG

Overview

MC9S08SE8CTG from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 8 KB flash, 512 bytes RAM, and integrated peripherals including SCI, 10-channel 10-bit ADC, two TPM modules, RTC, and KBI. It operates at up to 20 MHz CPU clock and 10 MHz bus frequency, supporting LIN communication and temperature sensing via on-chip sensor. It targets cost-sensitive industrial control and automotive body electronics.

For engineers reviewing the MC9S08SE8CTG datasheet, MC9S08SE8CTG pinout, MC9S08SE8CTG application, or MC9S08SE8CTG equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use scenarios, and validated alternative options for embedded system design and BOM optimization.

Technical Context

The MC9S08SE8CTG implements the HCS08 CPU core with HC08 instruction set extension (BGND), supporting up to 32 interrupt/reset sources and single-wire background debug. Its clock system integrates both external crystal/ceramic resonator support (31.25 kHz–16 MHz) and an internal frequency-locked-loop (FLL)-based ICS with factory-trimmed 39.0625 kHz reference and ±0.2% resolution over voltage/temperature.

Peripherals include a full-duplex SCI with LIN master/slave extended break handling, a 10-bit ADC with 2.5 μs conversion time and internal bandgap reference, dual TPM modules (TPM1: 2-channel, TPM2: 1-channel) supporting input capture, output compare, and edge-aligned or centered PWM, plus an 8-pin keyboard interrupt module and binary/decimal prescaled RTC.

Key Specifications

Pinout & Package

MC9S08SE8CTG is packaged in 16-pin TSSOP (Case 948F-01), with pin functions mapped per Table 1 of the Rev. 4 datasheet. All pins are shared across alternate functions (e.g., PTA5 serves as IRQ/TCLK/RESET), requiring software configuration at runtime. VSSA/VREFL and VDDA/VREFH are double-bonded to VSS and VDD respectively in this package.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9KEAZ128AMLH and MC9S08AC128CFGE, the MC9S08SE8CTG offers the lowest system-level power in Stop3 mode and smallest 16-pin TSSOP footprint - making it optimal for space-constrained, battery-sensitive applications where 8 KB flash suffices and HCS08 ecosystem familiarity is retained.

Availability

MC9S08SE8CTG is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, appliance motor control, and smart HVAC actuators requiring stable component supply and long-term industrial-grade availability.

Supply support for MC9S08SE8CTG 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 acquired Freescale in 2015 and maintains full support for the legacy HCS08 portfolio, delivering high-reliability microcontrollers for automotive, industrial, and consumer applications.

The MC9S08SE8CTG belongs to the S08SE family - designed specifically for cost-optimized, low-power embedded control in harsh environments, emphasizing integration of LIN, ADC, RTC, and ultra-low-power modes without external support components.

FAQ

What is the maximum operating frequency of the MC9S08SE8CTG CPU and bus?

The MC9S08SE8CTG CPU runs at up to 20 MHz, while its internal bus operates at up to 10 MHz. This is achieved using the internal clock source (ICS) with FLL enabled or an external crystal/resonator. The 10 MHz bus frequency directly governs peripheral timing - for example, SCI baud rates and TPM counter increments - and must be respected in register configuration to avoid timing violations.

Does the MC9S08SE8CTG support LIN communication natively?

Yes, the MC9S08SE8CTG includes a hardware SCI module with native LIN 2.x support: it generates extended break fields (master) and detects them (slave) without CPU intervention. This allows deterministic, low-overhead LIN node implementation - critical for automotive body networks where timing jitter must stay below 15% of nominal bit time.

What is the lowest power consumption mode available on the MC9S08SE8CTG, and what is its typical current draw?

The MC9S08SE8CTG supports Stop3 mode as its deepest low-power state, with typical current draw of 1.44 μA at –40°C to 85°C and 5 V supply. In this mode, the CPU, flash, and most peripherals are disabled, but the RTC and certain wakeup sources (e.g., KBI, SCI idle detect) remain active - enabling years of operation on a coin-cell battery.

Can the MC9S08SE8CTG operate from a 3.3 V supply, and how does that affect its ADC accuracy?

Yes, the MC9S08SE8CTG operates across 2.7 V to 5.5 V, including 3.3 V. Its 10-bit ADC uses an internal 1.2 V bandgap reference (VBG = 1.18–1.21 V), so full-scale input remains ~1.2 V regardless of VDD. At 3.3 V supply, ADC resolution is ~1.17 mV/LSB, and linearity is maintained per datasheet specifications - no recalibration is needed when switching from 5 V to 3.3 V operation.

Is the MC9S08SE8CTG pin-compatible with other devices in the S08SE family, such as the MC9S08SE4?

No, the MC9S08SE8CTG is not pin-compatible with the MC9S08SE4 in the same package. While both share the 16-pin TSSOP option, the MC9S08SE4 has reduced peripheral sets (e.g., no TPM2, fewer ADC channels) and different pin mappings for some alternate functions. Pin assignments must be verified per device-specific datasheet - especially for PTA7, PTA6, and PTCx pins which differ between variants.