NXP Semiconductors MC9S08PT8VTJ

Overview

MC9S08PT8VTJ from NXP Semiconductors is an 8-bit S08 microcontroller designed for cost-sensitive industrial and automotive control applications. It features 8 KB flash, 2 KB RAM, 256-byte EEPROM, 12-bit ADC (10 channels), two FlexTimer modules (6+2 channels), I²C, dual SCI/UART with LIN support, and operates at up to 20 MHz across –40 °C to 105 °C. Its 20-pin TSSOP package supports 18 GPIOs including four 20 mA high-drive pins.

For engineers reviewing the MC9S08PT8VTJ datasheet, MC9S08PT8VTJ pinout, MC9S08PT8VTJ application, or MC9S08PT8VTJ equivalent, this page delivers verified specifications, validated pin assignments for the 20-TSSOP variant, confirmed peripheral configurations (including TSI support for up to 8 electrodes), and real-world selection guidance against functionally aligned alternatives.

Technical Context

The MC9S08PT8VTJ implements an enhanced S08 CPU core with nested interrupt handling (up to four levels) and integrated background debug interface (BDM) using a single-wire connection. Its clock system combines an internal FLL (with ±1% accuracy from 0–70 °C) and external crystal/ceramic oscillator support (4–20 MHz), enabling precise bus timing at 20 MHz under full voltage (2.7–5.5 V) and temperature range.

System-level protection includes independent watchdog timer, programmable low-voltage detect (LVD) with multiple trip points (e.g., 4.3 V high-range threshold), illegal opcode/address detection, and flash/RAM access control. Power management supports Stop3 mode with sub-µA current (1.3 µA typical at 3 V) while retaining RTC, ADC, and TSI wake-up capability.

Key Specifications

Pinout & Package

MC9S08PT8VTJ uses a 20-pin TSSOP package (JEDEC MO-153) with 0.65 mm pitch, 7.0 × 4.4 mm body size, and exposed thermal pad (not electrically connected). Pin assignments are validated per MC9S08PT16 Series Data Sheet Rev. 4 (2020), Table 9 and Figure 9 - specifically for VTJ variant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08PT8VTJ, S9KEAZ128AMLH offers scalable 32-bit performance but demands board rework, whereas MC9S08AC128CFGE provides memory headroom within the same architecture-both require package adaptation but preserve functional alignment for industrial control use cases.

Availability

MC9S08PT8VTJ is available at Aetrix Electronics and suitable for motor control, automotive body electronics, industrial sensor nodes, and appliance control panels requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC9S08PT8VTJ 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 applications, with deep expertise in microcontrollers and edge processing.

The MC9S08PT series targets cost-optimized, robust control in harsh environments-designed for automotive body electronics, industrial automation, and white goods where reliability, low power, and mixed-signal integration are critical.

FAQ

What is the maximum operating frequency of the MC9S08PT8VTJ?

The MC9S08PT8VTJ supports a maximum bus frequency of 20 MHz across its full operating voltage range (2.7–5.5 V) and temperature range (–40 °C to 105 °C). This is achieved using either the internal FLL (with ±1% accuracy from 0–70 °C) or an external 4–20 MHz crystal oscillator. The MC9S08PT8VTJ maintains timing compliance without derating under these conditions.

How many ADC channels does the MC9S08PT8VTJ support, and what is its resolution?

The MC9S08PT8VTJ integrates a 12-bit successive-approximation ADC with 10 input channels. It achieves 2.5 µs conversion time, supports internal bandgap reference, optional hardware triggering, and operation in Stop3 mode. This configuration is confirmed in Table 1 of the MC9S08PT16 Series Data Sheet Rev. 4 for the VTJ package variant.

Does the MC9S08PT8VTJ support touch sensing, and how many electrodes can it handle?

Yes, the MC9S08PT8VTJ includes a Touch Sense Interface (TSI) module supporting up to 8 external electrodes in the 20-pin TSSOP package. It allows configurable software or hardware scan triggers, fully integrates with NXP's touch sensing software library, and can wake the MCU from Stop3 mode-verified in Section 7.5.1 and Table 1 of the datasheet.

What are the power consumption characteristics of the MC9S08PT8VTJ in low-power modes?

In Stop3 mode, the MC9S08PT8VTJ draws just 1.3 µA typical at 3 V and –40 to 105 °C (Table 5, item 6). With TSI enabled, total current rises to 121 µA (item 8); with ADC active in Stop3, it adds 40 µA (item 7). These values are measured with only the 1 kHz LPO clock active-enabling ultra-low-power monitoring in battery-operated systems.

Which debug interface does the MC9S08PT8VTJ use, and what are its requirements?

The MC9S08PT8VTJ uses a single-wire Background Debug Mode (BDM) interface via the BKGD/MS pin. It supports three breakpoints and on-chip ICE debugging with two comparators and nine trigger modes. Entry into BDM mode requires holding BKGD/MS low during power-up and for ≥100 ns after VDD exceeds the LVD threshold-per Section 6.2.1 timing specification tMSH.