NXP Semiconductors MC9S08PA8VTJR

Overview

MC9S08PA8VTJR from NXP Semiconductors is an 8-bit S08 microcontroller designed for cost-sensitive industrial and automotive control applications, featuring 8 KB flash, 2 KB RAM, 256 B EEPROM, 12-bit ADC (12-channel), and dual serial interfaces (SCI ×2, I²C, SPI). It operates at up to 20 MHz bus frequency across –40 °C to 105 °C and supports low-power stop3 mode with RTC and ADC active.

For engineers reviewing the MC9S08PA8VTJR datasheet, MC9S08PA8VTJR pinout, MC9S08PA8VTJR application, or MC9S08PA8VTJR equivalent, this page delivers verified specifications, validated package mapping (20-pin TSSOP), confirmed peripheral set (FTM ×2, ACMP, CRC), and real-world design context for embedded control, sensor interface, and LIN-capable communication systems.

Technical Context

The MC9S08PA8VTJR implements an enhanced S08 CPU core with four-level nested interrupt support and up to 40 interrupt/reset sources. Its clock system integrates a precision internal clock source (ICS) with FLL and factory-trimmed reference (±2% over –40 °C to 105 °C), plus external crystal oscillator support (4–20 MHz).

System protection includes independent watchdog with dedicated LPO clock, programmable low-voltage detect (LVD) with four warning thresholds, illegal opcode/address detection, and flash/RAM access protection. Debug is enabled via single-wire background debug interface (BDM) with three breakpoints and on-chip ICE module.

Key Specifications

Pinout & Package

MC9S08PA8VTJR is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP) with 0.65 mm pitch, optimized for compact industrial PCB layouts and reflow-compatible assembly. Pin assignments follow the MC9S08PA8(A) variant specification per Rev. 4 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08PA8VTJR, MC9S08PA16VTJR offers double flash capacity in identical packaging for seamless scalability, while S9KEAZ128AMLH provides modern ARM performance at the cost of software and toolchain requalification.

Availability

MC9S08PA8VTJR is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, sensor node development, and smart power management requiring stable component supply and long-term lifecycle assurance.

Supply support for MC9S08PA8VTJR 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in microcontrollers, RF, and analog technologies.

The MC9S08PA series was engineered for robust, low-cost embedded control in harsh environments - emphasizing reliability, integrated analog peripherals, and ultra-low-power operation for battery and 12 V automotive systems.

FAQ

What is the maximum operating frequency and voltage range for the MC9S08PA8VTJR?

The MC9S08PA8VTJR operates at a maximum bus frequency of 20 MHz across a supply voltage range of 2.7 V to 5.5 V, fully specified over the industrial temperature range of –40 °C to 105 °C. Its internal clock source (ICS) with FLL achieves this frequency using either internal trimmed reference or external crystal (4–20 MHz), with ±2% accuracy across the full temperature range.

Does the MC9S08PA8VTJR support in-circuit debugging, and what interface is used?

Yes, the MC9S08PA8VTJR supports in-circuit debugging via a single-wire background debug interface (BDM) compliant with NXP's HCS08 debug protocol. It includes three hardware breakpoints and an on-chip in-circuit emulator (ICE) module with two comparators and nine trigger modes, enabling full visibility into program flow and register states during development.

How many analog-to-digital converter (ADC) channels does the MC9S08PA8VTJR have, and what is its resolution?

The MC9S08PA8VTJR features a 12-channel, 12-bit successive approximation ADC with 2.5 µs conversion time. It supports optional hardware triggering, data buffering with watermark interrupt, automatic compare against configurable thresholds, and operation in stop3 mode - all using the internal bandgap reference for stable measurements independent of supply voltage.

What package type and pin count does the MC9S08PA8VTJR use?

The MC9S08PA8VTJR is supplied in a 20-pin Thin Shrink Small Outline Package (TSSOP) with 0.65 mm lead pitch. This package matches the MC9S08PA8(A) variant defined in the Rev. 4 datasheet and provides 18 GPIOs, including four 20 mA high-drive pins, two true open-drain outputs, and eight keyboard interrupt inputs.

Can the MC9S08PA8VTJR operate in low-power modes, and what is the lowest current consumption?

Yes, the MC9S08PA8VTJR supports multiple low-power modes, with stop3 mode achieving ≤1.35 µA typical supply current at 5 V (–40 °C to 105 °C), retaining RTC operation via the 1 kHz LPO clock. ADC and LVD modules can remain active in stop3, adding only 40 µA and 128 µA respectively - enabling wake-up on analog events without full system restart.