MC9S08PT8VWJ - 8-bit S08 MCU, 8KB Flash, 20-SOIC | NXP
MPN: MC9S08PT8VWJ ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.72 | $2.72 |
| 10 | $2.45 | $24.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.76 | $1,760.00 |
MC9S08PT8VWJ Overview
An 8-bit microcontroller (MCU) is a self-contained computing device integrating a CPU core, program flash memory, data RAM, EEPROM, timers, and peripherals on a single chip. MCUs form the lowest level of the embedded processing hierarchy - below 16-bit and 32-bit MPUs - and are widely used for cost-sensitive control tasks. The S08PT family belongs to NXP's (formerly Freescale) HCS08/S08 lineage of CISC 8-bit controllers, a mature architecture supported by CodeWarrior development tools.
The MC9S08PT8VWJ integrates a touch sensing interface (TSI), on-chip EEPROM, and a motor control FlexTimer, features specifically chosen by NXP to simplify appliance and industrial designs and reduce total system cost. The 5V-tolerant supply operation makes the part more durable and reliable in harsh industrial and user-interface environments, and the S08P family is designed to meet the IEC 60730 appliance safety standard.
Architecturally, the S08 CISC core executes compact code from 8KB of flash at up to 20 MHz, with industrial temperature grade operation for harsh environments. The FlexTimer provides PWM outputs suitable for motor control, lighting, and power conversion, while the TSI eliminates external capacitive-touch controllers in user-interface designs.
Typical applications include appliance control boards (washing machines, cooktops, fans), small motor control, capacitive-touch user interfaces, and general industrial control where a 5V noise-immune 8-bit MCU is preferred.
Design consideration: because this device is NRND (Not Recommended for New Designs) per NXP, new projects should evaluate the S08P successor or pin-compatible parts, and existing designs should plan a lifecycle migration path.
This page synthesizes distributor pricing, availability, and drop-in replacement analysis not found in the manufacturer datasheet. Pricing referenced is as of 2026-10-12.
Drop-in alternatives for MC9S08PT8VWJ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MC9S08PT8VWJ (same form factor and footprint) — differing in Package, Lifecycle Status, EEPROM, Supply Voltage, Touch Sensing Interface (TSI).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08PT16VTJ
✅ Drop-In ⚠️ Specs Unverified✓ In Stock
$1.89 / Unit
View Datasheet →MC9S08PT8VTJ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08PT8VLJ
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
MC9S08PT8VWJ Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (HCS08) 8-bit CISC |
| Core Size | 8-Bit |
| Speed | 20 MHz |
| Flash Memory | 8 KB (8K x 8) |
| EEPROM | Integrated on-chip |
| Supply Voltage | 3.3 V / 5 V |
| Package | 20-SOIC (0.295 inch, 7.50 mm width) |
| Mounting Type | Surface Mount |
| Operating Temperature Grade | Industrial |
| Peripherals | Touch Sensing Interface (TSI), FlexTimer (motor control), EEPROM |
| Safety Standard | IEC 60730 (appliance safety, S08P family) |
| Packaging | Tube |
| Terminal Form | Gull Wing |
| Number of Terminals | 20 |
| Package Code Family | SOIC (SSOP-class rectangular package per Partstack listing) |
| Lifecycle Status | NRND (Not Recommended for New Designs) per NXP product page |
MC9S08PT8VWJ soic (ssop-class rectangular package per partstack listing) Pin Configuration Guide
Pin configuration for MC9S08PT8VWJ (soic (ssop-class rectangular package per partstack listing) package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for MC9S08PT8VWJ.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08PT8VWJ is suitable for 6 applications: Appliance Control Boards, Small Motor Control (Fans, Pumps, Blowers), Capacitive-Touch User Interfaces, Industrial Sensing and Control Nodes, Power Supply and Charger Supervision, Legacy Design Maintenance and Last-Time-Buy Bridging.
Appliance Control Boards
The MC9S08PT8VWJ fits appliance control applications directly because NXP designed the S08P family to meet IEC 60730 appliance safety requirements and to run reliably from 5V supplies in harsh, electrically noisy environments. On a washing machine or dishwasher control board, the 20 MHz S08 core sequences relays and valves, monitors door switches and pressure sensors, and executes safety self-tests required by the standard. The integrated EEPROM stores cycle counters, calibration data, and fault logs without external memory, and the FlexTimer generates PWM for BLDC pump or fan control. Using the TSI, the same MCU can drive capacitive-touch buttons on the user panel, eliminating a separate touch controller and reducing board cost. Typical designs pair the MCU with IEC 60730-compliant supervision logic and opto-isolated triac or relay drivers.
Recommended
Small Motor Control (Fans, Pumps, Blowers)
The on-chip motor control FlexTimer is the reason the MC9S08PT8VWJ suits small motor control. The timer provides complementary PWM outputs with dead-time insertion for driving MOSFET half-bridges in BLDC and brushed-DC motor drives up to a few hundred watts, such as appliance fans, circulator pumps, and HVAC blowers. Running at 20 MHz, the S08 core closes speed loops with 10-bit ADC feedback at kilohertz rates, sufficient for these applications. The 5V supply class improves noise immunity against motor switching transients compared with 3.3V-only MCUs. On-chip EEPROM stores parameter sets and runtime hour counters. Layout-wise, keep the FlexTimer PWM pins short to the gate-driver inputs and use the TSI-free pins for Hall or current-shunt sense inputs to minimize crosstalk on the motor control timer channel.
Recommended
Capacitive-Touch User Interfaces
The MC9S08PT8VWJ integrates NXP's Touch Sensing Interface (TSI), enabling capacitive-touch buttons, sliders, and rotary encoders directly on GPIO pins without an external touch controller IC. This was a stated design goal for the S08PT family: to 'simplify design and help reduce system cost.' In a cooktop, control panel, or white-goods user interface, the MCU alternates TSI measurements across multiple electrodes, applies NXP's noise-robust touch algorithm, and outputs switching events or drives indicators. Because the MCU also handles the control loads (relays, PWM), a single 20-pin SOIC can replace an MCU-plus-touch-controller two-chip solution. The industrial temperature grade supports appliances near heat sources. Keep sense traces short, guard with ground pour, and route motor PWM away from TSI channels to preserve sensitivity and prevent false triggers.
Recommended
Industrial Sensing and Control Nodes
The MC9S08PT8VWJ serves as a compact, low-cost control node in industrial equipment where 5V I/O directly interfaces legacy sensors, optocouplers, and actuators. The 20 MHz S08 core executes polling loops and simple state machines; the 10-bit ADC reads 4-20 mA or 0-5 V sensor signals; and the on-chip EEPROM retains configuration, calibration constants, and cumulative runtime data across power cycles without external NVM. Its industrial temperature grade tolerates panel and enclosure environments, and the SOIC-20 wide package hand-solderable footprint simplifies prototyping and low-volume repair. In a conveyor counter, temperature monitor, or pump protection relay, the MCU reads the sensor, enforces threshold logic, and drives status outputs. Communication to a supervisory PLC is typically via opto-isolated digital I/O or a low-cost transceiver.
Recommended
Power Supply and Charger Supervision
The 5V-capable MC9S08PT8VWJ works well as a supervision and housekeeping controller in AC-DC power supplies and battery chargers. Its 10-bit ADC monitors output voltage, current, and temperature via resistor dividers and NTC thermistors; the FlexTimer can drive an auxiliary PWM stage such as a fan speed controller or a small buck for standby rail generation; and general-purpose I/O asserts enable, fault, and status flags. The integrated EEPROM stores configuration profiles and fault-history logs, useful in servicing industrial chargers. Because the MCU runs from the 5V housekeeping rail directly, no level shifting is needed against the 5V analog domain, improving robustness. Designs typically place the MCU downstream of the primary controller, handling battery-termination algorithms, timer-based cutoffs, and user indication on chargers for power tools and industrial batteries.
Recommended
Legacy Design Maintenance and Last-Time-Buy Bridging
Because the MC9S08PT8VWJ is NRND, a major ongoing use case is sustaining existing appliance and industrial products already designed around the S08P family. Procurement teams source remaining stock from DigiKey (both NXP-branded and Rochester Electronics/Freescale-branded listings), Mouser, and independent distributors - Heisener reported 6,240 pieces at $2.7197 as of 2026-10-12 - while engineering plans the migration. Practical strategies include buying a last-time-buy buffer, qualifying the MC9S08PT16VTJ (more flash, same family) for future builds, and re-spinning the board only when stock exhausts. Firmware written in CodeWarrior for the S08 core ports within the family with minimal changes. Maintaining a documented cross-reference and retest procedure ensures NRND-to-successor transitions do not disturb regulatory certifications such as IEC 60730.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08PT8VWJ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08PT16VTJ | MC9S08PT8VTJ | MC9S08PT8VLJ |
|---|---|---|---|---|
| Package | 20-SOIC (0.295 in, 7.50 mm width) | 20-SOIC class - verify body width on datasheet | 20-SOIC class - verify body width on datasheet | 20-pin variant - verify package on datasheet |
| Brand | NXP Semiconductors (originally Freescale) | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core / Speed | S08 8-bit CISC, 20 MHz | S08 8-bit, 20 MHz | S08 8-bit, 20 MHz | S08 8-bit, 20 MHz |
| Flash Memory | 8 KB | 16 KB | 8 KB | 8 KB |
| EEPROM | Integrated on-chip | Integrated on-chip | Integrated on-chip | Integrated on-chip |
| Supply Voltage Class | 3.3 V / 5 V | 3.3 V / 5 V (S08P family) | 3.3 V / 5 V (S08P family) | 3.3 V / 5 V (S08P family) |
| Touch Sensing Interface (TSI) | Yes | Yes | Yes | Yes |
Key Differentiators
- Integrated EEPROM eliminates external NVM (vs Generic 8-bit MCUs without EEPROM)
- Touch Sensing Interface (TSI) on-chip (vs MCUs requiring external touch controllers)
- 5V operation for harsh environments (vs 3.3V-only 8-bit MCUs)
Design Notes
The MC9S08PT8VWJ is NRND per the NXP product page. Do not start new designs on this part. For existing designs, verify current stock (Heisener reported 6,240 pieces as of 2026-10-12), and qualify a second source early - MC9S08PT16VTJ is the closest same-family upgrade. Check the NXP Product Change Notice section on the product page for discontinuation announcements before committing production volumes, since NRND parts can move to 'last time buy' with little warning.
The device uses the standard 20-pin wide SOIC (7.50 mm) gull-wing footprint. Place 0.1 uF ceramic decoupling directly across the VDD/VSS pair with a solid ground connection; in 5V appliance environments with relay and triac switching, add bulk capacitance (10 uF) at the supply entry and route motor PWM traces away from the TSI sense pins to prevent false touch triggers. The wide-body SOIC land pattern is a JEDEC-standard SOIC-20W footprint - do not substitute narrow-body SOIC land patterns.
The part operates in the 3.3 V / 5 V supply class per distributor specification data. When running from an appliance 5V rail, budget for supply transients from motor switching; an RC or LDO front-end on the MCU supply improves noise immunity. Exact minimum/maximum supply limits and IEC 60730 supervision requirements should be taken from the NXP S08PT datasheet electrical characteristics and safety chapters rather than estimated.
Compliance Information
RoHS/REACH/lead-free status not stated in provided web data; check the Environmental and Quality sections of the NXP product page. Safety standard context: NXP states the 5V S08P family is designed to help meet IEC 60730 appliance safety standard.
