NXP Semiconductors MC9S08PA8AVWJ

Overview

MC9S08PA8AVWJ 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/UART ×2, I²C, SPI). It operates at up to 20 MHz bus frequency across –40 °C to +105 °C and supports low-power stop modes with peripheral clock gating.

For engineers reviewing the MC9S08PA8AVWJ datasheet, MC9S08PA8AVWJ pinout, MC9S08PA8AVWJ application, or MC9S08PA8AVWJ equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative parts - all grounded in the official MC9S08PA16 Series Data Sheet Rev. 4 (03/2020) covering MC9S08PA8A devices.

Technical Context

The MC9S08PA8AVWJ implements an enhanced 8-bit S08 CPU core with nested interrupt support (up to four levels) and 40 interrupt/reset sources. Its internal clock system integrates a frequency-locked loop (FLL) with precision-trimmed internal reference (±2% over full temperature range) and supports external crystal/ceramic resonator inputs (4–20 MHz or 31.25–39.0625 kHz).

Peripherals include two flex timer modules (FTM0: 2-channel; FTM2: 6-channel), one 16-bit RTC, one 8-bit modulo timer, analog comparator (ACMP), CRC module, and watchdog with independent clock source. The device supports on-chip ICE debugging via single-wire background debug interface with three breakpoint capability.

Key Specifications

Pinout & Package

MC9S08PA8AVWJ is packaged in a 20-pin SOIC (package code VWJ), with thermal resistance R_θJA = 82 °C/W on single-layer board and 54 °C/W on four-layer board. Pin assignments are defined per Table 9.2 of the MC9S08PA16 Series Data Sheet Rev. 4.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08PA8AVWJ, MC9S08PA16AVWJ provides double flash capacity in identical 20-pin SOIC packaging - enabling seamless migration within same PCB layout, while S9KEAZ128AMLH represents a generational upgrade with ARM architecture, broader peripheral integration, and higher memory resources at the cost of software rework.

Availability

MC9S08PA8AVWJ is available at Aetrix Electronics and suitable for industrial motor control, automotive body electronics, sensor aggregation nodes, and smart power management systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC9S08PA8AVWJ 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, IoT, and mobile applications, with deep expertise in microcontrollers, RF, and analog technologies.

The MC9S08PA series targets cost-optimized, robust 8-bit control in harsh environments - designed specifically for automotive body electronics, industrial automation, and appliance control where reliability, extended temperature operation, and integrated analog peripherals are critical.

FAQ

What is the maximum operating frequency of the MC9S08PA8AVWJ?

The MC9S08PA8AVWJ supports a maximum bus frequency of 20 MHz across its full operating voltage range (2.7 V to 5.5 V) and temperature range (–40 °C to +105 °C). This frequency is achieved using either the internal FLL with trimmed reference or external crystal/ceramic resonator (4–20 MHz), as confirmed in Section 6.2.1 of the MC9S08PA16 Series Data Sheet Rev. 4.

Does the MC9S08PA8AVWJ support in-circuit debugging?

Yes, the MC9S08PA8AVWJ includes a single-wire background debug interface (BKGD/MS on PTA4) with full in-circuit emulation (ICE) capability - including three hardware breakpoints, two comparators, and nine trigger modes. This enables real-time debugging without halting system operation, as detailed in Section 1.1 and Table 7.2 of the MC9S08PA16 Series Data Sheet Rev. 4.

How many analog-to-digital converter (ADC) channels does the MC9S08PA8AVWJ have?

The MC9S08PA8AVWJ features a 12-channel, 12-bit ADC with 2.5 µs conversion time, internal bandgap reference, optional hardware trigger, and operation in stop mode. This matches the ADC specification for the MC9S08PA8A variant listed in Table 1 of the MC9S08PA16 Series Data Sheet Rev. 4.

What package type is used for the MC9S08PA8AVWJ?

The MC9S08PA8AVWJ uses a 20-pin SOIC package (package code VWJ), with thermal resistance R_θJA = 82 °C/W on single-layer board and 54 °C/W on four-layer board. This is explicitly confirmed in Table 1 (Ordering Information) and Section 6.3.1 (Thermal Characteristics) of the MC9S08PA16 Series Data Sheet Rev. 4.

Can the MC9S08PA8AVWJ operate in low-power modes?

Yes, the MC9S08PA8AVWJ supports multiple low-power modes including reduced-power wait mode and low-power stop mode (Stop3), where only the 1 kHz LPO clock remains active. Peripheral clocks can be individually gated via the peripheral clock enable register, reducing current draw to as low as 1.3 µA in Stop3 mode - verified in Table 5 of the MC9S08PA16 Series Data Sheet Rev. 4.