NXP Semiconductors MC9S08PL8SCTJR

Overview

MC9S08PL8SCTJR from NXP Semiconductors is an 8-bit S08 microcontroller with 8 KB flash, 1 KB RAM, and a 20 MHz bus frequency across 2.7–5.5 V supply range. It integrates a 12-channel 10-bit ADC, two FTM modules (6-channel + 2-channel), SCI/I²C/ACMP/RTC peripherals, and supports low-power stop3 mode with <1.3 µA typical current. It targets cost-sensitive embedded control in industrial sensors and appliance motor interfaces.

For engineers reviewing the MC9S08PL8SCTJR datasheet, MC9S08PL8SCTJR pinout, MC9S08PL8SCTJR application, or MC9S08PL8SCTJR equivalent, key selection considerations include its 20-pin TSSOP package, flash size distinction from MC9S08PL16S, ADC channel count, peripheral clock gating capability, and compatibility with NXP's S08 background debug interface.

Technical Context

The MC9S08PL8SCTJR implements an S08 CPU core with four-level nested interrupt support and up to 30 interrupt/reset sources. Its Internal Clock Source (ICS) uses an FLL with factory-trimmed internal reference (0.2% resolution, ±1.5% deviation over –40°C to +85°C) enabling stable 20 MHz operation without external crystal.

System-level interconnects enable hardware-triggered peripheral coordination-e.g., SCI RxD capture triggering ADC conversion or FTM overflow synchronizing RTC updates-reducing software overhead in timing-critical tasks like metering calibration or IR signal decoding.

Key Specifications

Pinout & Package

MC9S08PL8SCTJR is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP) with 0.65 mm pitch, JEDEC MO-153 compliant, thermal resistance R_θJA = 116°C/W (single-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08PL16SCTJR, the MC9S08PL8SCTJR reduces flash capacity by 50% while maintaining identical peripheral functionality and package compatibility; versus S9S08PL8F2CTJR, it trades flash endurance and operating temperature for lower unit cost in commercial-grade applications.

Availability

MC9S08PL8SCTJR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance motor interfaces, energy meter front-ends, and IR remote receiver modules requiring stable component supply and long-term production continuity.

Supply support for MC9S08PL8SCTJR 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 over 50 years of microcontroller innovation.

The MC9S08PL8SCTJR belongs to NXP's S08 PL-series, designed specifically for cost-optimized, low-power embedded control in appliances, sensors, and metering applications where flash density and peripheral integration outweigh raw performance needs.

FAQ

What is the maximum operating frequency of the MC9S08PL8SCTJR?

The MC9S08PL8SCTJR supports a maximum bus frequency of 20 MHz across its full operating voltage range (2.7–5.5 V) and temperature range (–40°C to +85°C). This is achieved using either the internal ICS FLL with factory-trimmed reference or an external 4–20 MHz crystal oscillator. The 20 MHz specification is guaranteed per NXP's datasheet Rev. 3 (06/2020) and applies directly to the MC9S08PL8SCTJR variant.

Does the MC9S08PL8SCTJR support in-circuit debugging?

Yes, the MC9S08PL8SCTJR includes a single-wire background debug interface (BDM) with three hardware breakpoints and on-chip in-circuit emulator (ICE) logic containing two comparators and nine trigger modes. This enables full firmware validation, real-time variable inspection, and non-intrusive execution control without requiring external debug probes-critical for rapid development of applications using the MC9S08PL8SCTJR.

How many ADC channels does the MC9S08PL8SCTJR have, and what is their resolution?

The MC9S08PL8SCTJR features a 12-channel, 10-bit successive approximation register (SAR) ADC with 2.5 µs conversion time, eight-level FIFO buffering, and optional hardware watermark interrupts. All 12 channels are accessible on the 20-pin TSSOP package (PTA0–PTA3, PTB0–PTB3, PTC0–PTC3), matching the channel count of the MC9S08PL16S despite its smaller flash size.

What power-saving modes are available on the MC9S08PL8SCTJR?

The MC9S08PL8SCTJR offers multiple low-power states: reduced-power wait mode, one low-power stop mode, and Stop3 mode drawing ≤1.3 µA (5 V). In Stop3, only the 1 kHz LPO clock remains active; peripherals like ADC, ACMP, and LVD can be selectively enabled as adders with documented current penalties (e.g., +85 µA for ADC, +126 µA for LVD). Clock gating via the PMC register further minimizes active-mode current.

Is the MC9S08PL8SCTJR pin-compatible with other members of the S08 PL family?

Yes, the MC9S08PL8SCTJR in 20-pin TSSOP (package code "TJ") shares identical pinout and electrical characteristics with the MC9S08PL16SCTJR and S9S08PL8F2CTJR. All three variants support the same peripheral mappings, voltage ratings, and thermal specifications for this package, enabling drop-in replacement where flash size or endurance requirements permit-confirmed by NXP's official pin assignment tables and orderable part number documentation.