NXP Semiconductors MC9S08PA4AMSC

Overview

MC9S08PA4AMSC 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 125°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 appliance motor control.

For engineers reviewing the MC9S08PA4AMSC datasheet, MC9S08PA4AMSC pinout, MC9S08PA4AMSC application, or MC9S08PA4AMSC equivalent, this page delivers verified electrical specs, package mapping to 8-pin SOIC, validated peripheral timing, real-world use cases, and two confirmed alternative parts for design continuity and sourcing flexibility.

Technical Context

The MC9S08PA4AMSC implements an S08 CPU core with four-level nested interrupt handling and up to 40 interrupt/reset sources. Its clock system combines a 31.25 kHz–20 MHz external oscillator (XOSC) and an internal clock source (ICS) with FLL, enabling precise 1% internal reference accuracy over 0°C–70°C.

System protection includes independent watchdog timer, programmable low-voltage detect/warning with hysteresis, illegal opcode/address detection, and flash/RAM access protection. Debug is supported via single-wire background debug interface (BKGD/MS), ICE module with two comparators and nine trigger modes.

Key Specifications

Pinout & Package

MC9S08PA4AMSC is housed in an 8-pin SOIC (SC) package with 0.150" body width and standard JEDEC MS-012AC footprint. Pin assignments are validated per datasheet Rev. 10 (03/2020), Figure 9 and Table 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08PA4AMSC, MC9S08PA2AMSC offers cost reduction at the expense of memory headroom, while S9S08PA4VSC provides certified automotive robustness without altering pinout or software compatibility - enabling seamless migration paths for scaling or qualification upgrades.

Availability

MC9S08PA4AMSC is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance motor control, and smart lighting interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC9S08PA4AMSC 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 markets, with deep expertise in microcontrollers, RF, and analog technologies.

The MC9S08PA4AMSC belongs to NXP's legacy S08PA 8-bit MCU family, designed specifically for cost-sensitive, low-power embedded control in harsh environments - emphasizing integrated analog peripherals, robust system protection, and debug accessibility for rapid development.

FAQ

What is the maximum operating frequency and voltage range for the MC9S08PA4AMSC?

The MC9S08PA4AMSC 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 industrial temperature range of –40°C to +125°C. This performance is guaranteed with internal clock source (ICS) or external crystal/resonator configurations, and validated per datasheet Rev. 10 Section 6.2.1 and Table 7.

Does the MC9S08PA4AMSC support in-circuit debugging, and what interface is used?

Yes, the MC9S08PA4AMSC supports in-circuit debugging via its single-wire background debug interface (BKGD/MS), which uses the PTA4 pin. It includes breakpoint capability for up to three breakpoints and an on-chip ICE debug module with two comparators and nine trigger modes - all documented in Section 1 and Table 1 of the MC9S08PA4 Data Sheet Rev. 10.

What are the key analog features integrated into the MC9S08PA4AMSC?

The MC9S08PA4AMSC integrates an 8-channel, 12-bit ADC with 2.5 µs conversion time, internal bandgap reference, and stop-mode operation; plus a dedicated analog comparator (ACMP) with independently configurable rising/falling edge interrupts and filtering. These are detailed in Sections 7.3.1 and 7.3.2 of the datasheet, enabling self-contained sensor signal acquisition without external components.

Which package type does the MC9S08PA4AMSC use, and what are its thermal characteristics?

The MC9S08PA4AMSC uses an 8-pin SOIC package (package code SC), with thermal resistance RθJA = 150°C/W on a single-layer board and 87°C/W on a four-layer board (Table 10, Rev. 10). This package supports surface-mount assembly and meets JEDEC MS-012AC mechanical specifications, enabling reliable operation in high-temperature industrial environments.

How does the MC9S08PA4AMSC handle low-voltage conditions and system protection?

The MC9S08PA4AMSC includes programmable low-voltage detection (LVD) with selectable trip points (2.56–4.4 V), hysteresis, and interrupt/reset options; an independent watchdog timer with dedicated clock source; illegal opcode/address detection; and flash/RAM access protection. These features are fully specified in Sections 5.4 and 7.2 of the datasheet, ensuring fail-safe behavior during brownout or software fault conditions.