NXP Semiconductors MC9S08PL4CTJ

Overview

MC9S08PL4CTJ from NXP Semiconductors is an 8-bit S08 microcontroller with 4 KB flash, 512 byte RAM, and 128 byte EEPROM, operating at up to 20 MHz across –40 °C to +85 °C. It integrates ADC (8-channel, 10-bit), dual FTM modules, SCI/UART with LIN support, RTC, analog comparator, and keyboard interrupt module-designed for cost-sensitive embedded control in industrial sensors and motor drive interfaces.

For engineers reviewing the MC9S08PL4CTJ datasheet, MC9S08PL4CTJ pinout, MC9S08PL4CTJ application, or MC9S08PL4CTJ equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use scenarios, and validated alternative options for low-pin-count 8-bit MCU selection in temperature-stable industrial control designs.

Technical Context

The MC9S08PL4CTJ implements an S08 CPU core with nested four-level interrupt handling and up to 40 interrupt/reset sources. Its clock system combines a Pierce external oscillator (31.25 kHz–20 MHz) and an internal ICS with FLL, delivering ±1% frequency accuracy from 0 °C to 70 °C and ±2% over full operating range.

System protection includes independent watchdog clock, configurable low-voltage detection (LVD) with four warning levels and hysteresis, illegal opcode/address reset, and flash/RAM access protection. Debug is supported via single-wire background interface with three breakpoints and on-chip ICE with two comparators and nine trigger modes.

Key Specifications

Pinout & Package

MC9S08PL4CTJ is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 0.65 mm lead pitch and exposed pad not present. Pin assignments are validated per datasheet Rev. 3 (08/2019), Figure 1 and Section 9.2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08PL4CTJ, S9S08PL4CTJ offers identical functionality with enhanced long-term availability, while MC9RS08LA8CTJ trades analog peripherals and nonvolatile data storage for USB connectivity-making it unsuitable for sensor calibration retention or LIN-based motor control where MC9S08PL4CTJ excels.

Availability

MC9S08PL4CTJ is available at Aetrix Electronics and suitable for industrial sensor nodes, small-appliance motor drives, smart HVAC actuators, and legacy protocol bridges requiring stable component supply across extended product lifecycles.

Supply support for MC9S08PL4CTJ 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.

The MC9S08PL4CTJ belongs to the S08PL family-designed specifically for cost-optimized, low-pin-count 8-bit control in temperature-stable industrial environments requiring integrated analog peripherals and robust debug support.

FAQ

What is the maximum operating frequency of the MC9S08PL4CTJ and under what conditions is it guaranteed?

The MC9S08PL4CTJ operates at up to 20 MHz bus frequency across its full specified voltage range (2.7 V to 5.5 V) and temperature range (–40 °C to +85 °C). This maximum frequency is guaranteed per datasheet Rev. 3 (08/2019), Table 6, and applies to both FEI and FBE clock modes. The internal ICS with FLL ensures stable operation with ±2% deviation over the full temperature range, making MC9S08PL4CTJ suitable for timing-critical industrial control loops.

Does the MC9S08PL4CTJ support in-system programming and how is flash endurance rated?

Yes, the MC9S08PL4CTJ supports full in-system programming of its 4 KB flash memory-including read, program, and erase operations while executing code from other flash regions. Flash endurance is rated at 10,000 to 100,000 program/erase cycles across the operating temperature range, with data retention guaranteed for 15–100 years at 85 °C junction temperature after 10,000 cycles. These values are documented in Table 12 of the MC9S08PL4 datasheet Rev. 3.

What power-saving modes does the MC9S08PL4CTJ offer and what is the lowest achievable current draw?

The MC9S08PL4CTJ provides multiple low-power modes including Wait and Stop3. In Stop3 mode-with only the 1 kHz LPO clock active-the typical supply current is 1.5 µA at 5 V and 0.85 µA at 3 V (Table 5, item 6). Additional peripherals like ADC or LVD add predictable current increments (e.g., +96 µA for ADC in Stop3), enabling precise battery-life estimation. This ultra-low quiescent current makes MC9S08PL4CTJ viable for multi-year operation on primary lithium cells.

Can the MC9S08PL4CTJ operate with a 32.768 kHz crystal and what oscillator configuration is required?

Yes, the MC9S08PL4CTJ supports 32.768 kHz crystals via its external oscillator (XOSC) in low-range mode (RANGE = 0), as specified in Table 11. This configuration requires external load capacitors (C1/C2) and optionally a series resistor (RS), with startup time of ≤1000 ms in low-power mode. When paired with the internal ICS, the 32.768 kHz crystal can serve as the reference for the FLL to generate higher-frequency system clocks-enabling precise RTC operation and low-jitter timing for MC9S08PL4CTJ-based timekeeping applications.

Is the MC9S08PL4CTJ pin-compatible with other members of the S08PL family such as MC9S08PL8 or MC9S08PL16?

No, the MC9S08PL4CTJ is not pin-compatible with MC9S08PL8CTJ or MC9S08PL16CTJ. While all share the 20-pin TSSOP package (TJ suffix), differences in peripheral integration-such as number of ADC channels (8 vs. 16), FTM channel count (4 vs. 6), and GPIO count (18 vs. 24)-result in distinct pin multiplexing and signal assignments. Pin compatibility is limited to same-flash-size variants like S9S08PL4CTJ; migration to larger-flash S08PL parts requires PCB redesign and firmware adaptation.