MC9S08PT16AVWJ - 8-bit S08 MCU 16KB Flash 20MHz SOIC-20 | NXP
MPN: MC9S08PT16AVWJ ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.6 | $2.60 |
| 10 | $2.35 | $23.50 |
| 100 | $2.05 | $205.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.65 | $1,650.00 |
MC9S08PT16AVWJ Overview
An 8-bit microcontroller (MCU) is an integrated circuit that combines a processor core, memory, and peripherals on a single chip, positioned within the broader hierarchy as MCU -> embedded processor -> semiconductor. The S08 family from NXP is a widely deployed 8-bit architecture used in cost-sensitive embedded control, sitting alongside NXP's Kinetis ARM-based MCUs in the company's embedded processing portfolio.
Key features of the MC9S08PT16AVWJ include the 8-bit S08 CPU supporting up to 20 MHz bus clock, up to 40 interrupt/reset sources with four-level nested interrupts, 16 KB of flash program memory, and 2 KB of RAM. The integrated PWM module supports motor drive and power conversion applications, while the on-chip ADC enables analog sensing and the UART provides serial communication for industrial and consumer products.
From an architecture standpoint, the S08 core is an enhanced HCS08 CPU with efficient C-code execution, background debug mode for non-intrusive development, and low-power wait and stop modes that reduce current consumption in battery-operated and always-on designs. The wide 2.7 V to 5.5 V operating range allows direct connection to 3.3 V and 5 V systems without level shifting.
Typical applications include small motor control (fans, pumps, tools) using the PWM module, household appliance control, power supply and battery charger supervision, and touch-sensitive user interfaces exploiting the on-chip TSI peripheral.
A key design consideration is flash programming: the part supports in-circuit flash programming via the single-wire background debug interface, so plan the BDM connector footprint early in the PCB layout.
This page synthesizes distributor availability data, drop-in alternatives from the S08PT family, and practical design notes not consolidated in the manufacturer datasheet.
Drop-in alternatives for MC9S08PT16AVWJ — 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 MC9S08PT16AVWJ (same form factor and footprint) — differing in Package, Operating Temperature, Core Processor, EEPROM, Program Memory (Flash).
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08PT16VTJ
✅ Drop-In✓ In Stock
$1.89 / Unit
View Datasheet →MC9S08PT8AVWJ
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08PA4VWJ
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08SH16MTJ
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →MC9S08PT16AVWJ Maximum Ratings & Electrical Characteristics
| Core Processor | S08 (8-bit HCS08) |
| Core Size | 8-bit |
| Maximum Bus Speed | 20 MHz |
| Flash Memory | 16 KB (16K x 8) |
| RAM Size | 2 KB |
| EEPROM | EEPROM with TSI (per FindIC listing of this part) |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Operating Temperature | -40C to +105C |
| Peripherals | PWM module, ADC, UART |
| Interrupt Sources | Up to 40 interrupt/reset sources |
| Interrupt Nesting | Up to four-level nested interrupt |
| Package | 20-SOIC |
| Mounting Type | Surface Mount |
| Series | S08PT (MC9S08PT16(A) / MC9S08PT8(A)) |
| Data Converters | ADC |
| Connectivity | UART |
| Lifecycle Status | Active (per NXP product page) |
MC9S08PT16AVWJ 20-soic Pin Configuration Guide
Pin configuration for MC9S08PT16AVWJ (20-soic 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 MC9S08PT16AVWJ.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08PT16AVWJ is suitable for 6 applications: Small Motor Control, Home Appliance Control, Touch-Sensing User Interfaces, Power Supply and Battery Charger Supervision, Industrial Sensor Nodes, Consumer Electronics Embedded Control.
Small Motor Control
The MC9S08PT16AVWJ fits small motor control (fans, pumps, power tools, small BLDC drives) because NXP integrates a dedicated PWM module alongside the 20 MHz S08 core, providing deterministic PWM generation without software bit-banging. The 16 KB flash holds closed-loop control algorithms plus commutation tables, while the 2 KB RAM supports control-loop state variables and filtering. The 2.7 V to 5.5 V supply range lets the MCU share the motor-drive rail or run from a 3.3 V logic supply, and the -40 C to +105 C rating covers enclosed appliance environments. The on-chip ADC samples current-shunt and back-EMF feedback for speed or torque regulation, and the UART provides telemetry or commissioning links to higher-level controllers.
Recommended
Home Appliance Control
Appliance control boards benefit from the MC9S08PT16AVWJ's combination of wide supply range, industrial temperature rating, and rich mixed-signal integration in a compact 20-SOIC footprint. The -40 C to +105 C operating range withstands cooking and laundry environments, and the 20 MHz bus at 2.7 V to 5.5 V per the NXP datasheet allows direct interface to 5 V relay drivers and sensors. The 16 KB flash accommodates state machines, button debouncing, and fault logging, while the TSI touch-sensing interface enables capacitive button panels without dedicated touch controllers. The UART supports service diagnostics, and the ADC reads NTC temperature sensors for heater or compressor supervision, reducing total bill-of-materials cost versus discrete solutions.
Recommended
Touch-Sensing User Interfaces
The MC9S08PT16AVWJ includes an EEPROM block with Touch Sensing Interface (TSI) as noted in distributor parametric listings, allowing capacitive touch buttons and sliders to be implemented directly on the MCU without an external touch IC. In this application, copper pads on the PCB connect to TSI-capable pins, and firmware measures capacitance changes to detect finger presence. The 20 MHz S08 core executes the acquisition and debounce routines with margin, the 16 KB flash stores calibration and multi-key gesture logic, and the 2 KB RAM holds baseline-tracking buffers. This suits light switches, control panels, and small appliance fascias where a sealed, mechanical-switch-free surface improves cleanliness and reliability.
Recommended
Power Supply and Battery Charger Supervision
The MC9S08PT16AVWJ serves as a supervision controller in AC-DC converters and battery chargers, where its on-chip ADC monitors output voltage and current via resistor dividers and shunts, and PWM outputs drive status indication or assist in feedback adjustment. The 5 V-tolerant supply range allows direct powering from an auxiliary winding rectified to 5 V, and the -40 C to +105 C rating suits enclosed power supplies. The UART enables PMBus-style or proprietary serial reporting to a host, and the 16 KB flash stores charge algorithms (CC/CV profiles, termination criteria) with headroom for future firmware updates via the single-wire background debug interface, supporting field service without replacing the MCU.
Recommended
Industrial Sensor Nodes
In industrial sensing and monitoring nodes, the MC9S08PT16AVWJ combines low-power wait/stop modes with enough integration to condition and digitize analog signals locally. The 8-bit S08 CPU at up to 20 MHz handles scaling, filtering, and threshold alarms, while the ADC acquires 4-20 mA-derived or ratiometric sensor signals. The UART provides a robust serial link to PLC-side gateways or RS-485 transceivers, and the 16 KB flash stores linearization tables for thermistors and other nonlinear sensors. The 2.7 V to 5.5 V operating range permits direct 5 V loop-powered designs, and four-level nested interrupts let time-critical sampling coexist with background communication handling in compact, low-cost nodes.
Recommended
Consumer Electronics Embedded Control
For cost-sensitive consumer products - small appliances, toys, lighting controls, and personal-care devices - the MC9S08PT16AVWJ delivers a complete 8-bit control solution in a 20-pin SOIC that keeps PCB area and assembly cost low. The 20 MHz bus gives responsive user-interface timing, the TSI touch interface supports modern buttonless enclosures, and the wide 2.7 V to 5.5 V range accommodates 2-cell battery stacks or USB-derived 5 V rails. The 16 KB flash leaves room for feature growth across product variants on a single hardware platform, and NXP's S08 tool ecosystem (CodeWarrior-based development and low-cost background debug probes) shortens development cycles for high-volume consumer programs.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08PT16AVWJ — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08PT16VTJ | MC9S08PT8AVWJ | MC9S08PA4VWJ | MC9S08SH16MTJ |
|---|---|---|---|---|---|
| Package | 20-SOIC | 20-SOIC - same | 20-SOIC - same | 20-SOIC - same | 20-SOIC class - verify drawing |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 16 KB | 16 KB | 8 KB | 4 KB | 16 KB |
Key Differentiators
- Maximum memory in the 20-SOIC PT family (vs MC9S08PT8AVWJ)
- Extended temperature grade in the A suffix (vs MC9S08PT16VTJ)
- Integrated TSI touch sensing (vs MC9S08PA4VWJ)
Design Notes
Reserve a 3-pin or 4-pin background debug mode (BDM) header footprint on every board using the MC9S08PT16AVWJ. The single-wire BDM interface is the only route for flash programming and on-chip debugging, and retrofitting a header after layout freeze is costly. Place the header near the MCU with short traces to the debug pin, and keep series resistors optional so the header can be populated only during production programming and omitted on cost-reduced revisions.
Decouple the VDD pin with a 0.1 uF ceramic capacitor placed within a few millimeters of the pin, plus a 1 uF to 10 uF bulk capacitor per supply domain. The device operates from 2.7 V to 5.5 V, so in motor-drive or power-supply applications where the same rail feeds inductive loads, add local filtering to keep supply transients within the datasheet absolute maximum ratings. In noisy environments consider an RC or ferrite filter between the main rail and the MCU supply.
Most package pins are multiplexed between GPIO, PWM, ADC, TSI, and UART functions. Before finalizing the schematic, cross-check every pin assignment against the signal multiplexing tables in the NXP MC9S08PT16 datasheet - assigning an ADC channel and a PWM output to the same physical pin is a common schematic error that surfaces only during firmware bring-up. Also confirm that the configured bus frequency and supply voltage combination stays inside the datasheet operating envelope across the full -40 C to +105 C temperature range.
Compliance Information
The NXP product page lists an Environmental Quality section, but specific RoHS/REACH status for this exact ordering part number was not present in the retrieved snippets. Verify on the NXP part page before relying on compliance claims.
