NXP Semiconductors MC9S08PA4VWJR

Overview

MC9S08PA4VWJR from NXP Semiconductors is an 8-bit S08 microcontroller with 4 KB flash, 512 byte RAM, and 128 byte EEPROM, operating up to 20 MHz across 2.7–5.5 V and –40°C to +105°C. It integrates an 8-channel 12-bit ADC, three 2-channel FlexTimer modules, SCI/UART with LIN support, RTC, analog comparator, and keyboard interrupt module - deployed in automotive body control, industrial sensor nodes, and low-power embedded instrumentation.

For engineers reviewing the MC9S08PA4VWJR datasheet, MC9S08PA4VWJR pinout, MC9S08PA4VWJR application, or MC9S08PA4VWJR equivalent, this page delivers verified electrical specs, validated package mapping (20-pin SOIC), confirmed peripheral timing behavior, real-world use-case implementation guidance, and two rigorously cross-checked alternative parts for design continuity.

Technical Context

The MC9S08PA4VWJR uses an S08 CPU core with nested four-level interrupt handling and supports both FEI (internal FLL) and FBE (external crystal) clock modes. Its ICS includes a frequency-locked loop with factory-trimmed internal reference achieving ±1% accuracy from 0°C to 70°C and ±2% over full operating range.

Peripherals are tightly integrated via the System Integration Module (SIM): ADC operates in stop mode with hardware trigger and watermark buffering; FTM modules support edge- and center-aligned PWM, input capture, and output compare; SCI implements NRZ UART with optional 13-bit break and LIN physical layer compliance.

Key Specifications

Pinout & Package

MC9S08PA4VWJR is packaged in a 20-pin SOIC (package code VWJ), with 0.3 inch body width, standard JEDEC MS-013AC footprint, and lead finish matte tin over nickel.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08PA4VWJR, MC9S08PA8VWJR offers double flash capacity with zero hardware change, while S9KEAZ128AMLH provides ARM-based scalability at the cost of architectural discontinuity and layout revision.

Availability

MC9S08PA4VWJR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, and smart appliance interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC9S08PA4VWJR 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, IoT, mobile, and communication infrastructure markets.

The MC9S08PA4VWJR belongs to the S08PA family - designed specifically for cost-sensitive, low-power embedded control applications where robust analog integration, LIN compatibility, and extended temperature operation are essential.

FAQ

What is the maximum operating frequency and voltage range for the MC9S08PA4VWJR?

The MC9S08PA4VWJR operates at up to 20 MHz bus frequency across a supply voltage range of 2.7 V to 5.5 V, fully specified over the –40°C to +105°C ambient temperature range. Its internal ICS with FLL achieves this speed using either an external crystal (4–20 MHz) or internal reference, and all flash/RAM/EEPROM operations are guaranteed across this full voltage and temperature envelope. This makes MC9S08PA4VWJR suitable for automotive under-hood and industrial environments where wide voltage tolerance and thermal resilience are critical.

Does the MC9S08PA4VWJR support LIN communication, and how is it implemented?

Yes, the MC9S08PA4VWJR supports LIN communication through its SCI0 module, which includes optional 13-bit break detection and non-return-to-zero (NRZ) framing compliant with LIN 2.x physical layer requirements. The SCI is configured in UART mode with programmable baud rate generation and supports automatic wakeup on dominant bus level. No external transceiver is required for basic node functionality, though a LIN transceiver (e.g., TJA1020) is needed for bus-level compliance. This capability is confirmed in the "Peripherals" section of the MC9S08PA4 datasheet Rev. 10.

How many high-current drive pins does the MC9S08PA4VWJR have, and what is their rating?

The MC9S08PA4VWJR has two dedicated high-current drive pins: PTB4 and PTB5, each capable of sourcing or sinking up to 20 mA continuously. These pins are explicitly designated in the datasheet as "ultra-high current sink pins" and maintain VOL ≤ 0.8 V and VOH ≥ VDD – 0.8 V at 20 mA load under 5 V operation. They are intended for direct driving of LEDs, small relays, or solenoids without external buffers - a key differentiator for space-constrained automotive and appliance control designs using MC9S08PA4VWJR.

Can the MC9S08PA4VWJR perform ADC conversions while in low-power stop mode?

Yes, the MC9S08PA4VWJR supports ADC operation in stop3 mode when configured with ADLPC = 1, ADLSMP = 1, ADCO = 1, MODE = 10B, and ADICLK = 11B. In this configuration, the ADC consumes only 96.0 µA @ 5 V (88.3 µA @ 3 V) while performing conversions - enabling periodic sensor sampling without exiting low-power state. This feature is documented in Table 5, item 7 of the MC9S08PA4 datasheet Rev. 10 and is critical for battery-operated applications relying on MC9S08PA4VWJR for energy-efficient data acquisition.

What debug interface does the MC9S08PA4VWJR provide, and what are its capabilities?

The MC9S08PA4VWJR features a single-wire background debug interface (BDM) accessible via the BKGD/MS pin, supporting in-circuit debugging without halting real-time operation. It includes breakpoint capability (up to three active breakpoints), on-chip ICE with two comparators and nine trigger modes, and full register visibility. Debug entry requires holding BKGD/MS low during power-up or issuing a forced reset - a method validated in Section 6.2.1 timing specifications. This BDM implementation is standardized across the S08 family and fully supported by CodeWarrior Development Studio for HCS08.