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NXP Semiconductors MC9S08PA4AVTJ
- Part No.:
- MC9S08PA4AVTJ
- Manufacturer:
- NXP Semiconductors
- Category:
- Microcontrollers
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
MC9S08PA4AVTJ.pdf
- Description:
- IC MCU 8BIT 4KB FLASH 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,620
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Product details
Overview
MC9S08PA4AVTJ from NXP Semiconductors is an 8-bit S08 microcontroller designed for cost-sensitive embedded control applications, featuring a 20 MHz bus frequency across 2.7–5.5 V supply, 4 KB flash, 512 byte RAM, and 128 byte EEPROM with in-circuit programmability. It integrates an 8-channel 12-bit ADC, three 2-channel FlexTimer modules, SCI UART with LIN support, RTC, and analog comparator - deployed in motor control, sensor interface, and industrial I/O modules.
For engineers reviewing the MC9S08PA4AVTJ datasheet, MC9S08PA4AVTJ pinout, MC9S08PA4AVTJ application, or MC9S08PA4AVTJ equivalent, this page delivers verified technical context, package-specific pin mapping, real-world use cases, and validated alternative options for design-in and BOM continuity planning.
Technical Context
The MC9S08PA4AVTJ implements an enhanced S08 CPU core with up to four-level nested interrupt handling and support for 40 interrupt/reset sources. Its clock system combines an external crystal/ceramic oscillator (31.25 kHz–20 MHz) and an internal clock source (ICS) with FLL-based frequency multiplication and factory-trimmed reference enabling ≤1% deviation over 0–70 °C.
System protection includes independent watchdog timer, selectable low-voltage detect/warning thresholds (2.56–4.8 V), illegal opcode/address detection, and flash/RAM access protection. Peripherals operate in stop3 mode: ADC, ACMP, and RTC retain functionality with sub-µA quiescent current, while BKGD single-wire debug enables in-circuit emulation with three breakpoints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 8-bit S08 CPU with up to 20 MHz bus frequency at 2.7–5.5 V - enables deterministic real-time control in resource-constrained systems. |
| Memory | 4 KB flash (read/program/erase over full voltage/temp range), 512 byte RAM, 128 byte EEPROM with 2-byte erase sectors - supports field firmware updates and data logging without external storage. |
| ADC | 8-channel, 12-bit resolution, 2.5 µs conversion time, internal bandgap reference, hardware-triggered operation in stop mode - suitable for precision analog sensing in battery-powered devices. |
| Timers | Three 2-channel FlexTimer modules (FTM0/FTM1/FTM2), each 16-bit counter configurable for input capture, output compare, or edge-/center-aligned PWM - provides flexible motor control and signal generation capability. |
| Communication | One SCI UART with LIN extension support, full-duplex NRZ, optional 13-bit break - meets automotive and industrial serial communication requirements without protocol co-processor. |
| Power Management | Stop3 mode with 1.5 µA typical supply current (5 V), peripheral clock gating, and LVD adder of 129 µA - extends battery life in always-on monitoring applications. |
| Package & Temp | 20-pin TSSOP (VTJ suffix), –40 to +105 °C operating range - compatible with automated SMT assembly and suitable for under-hood or industrial ambient environments. |
Pinout & Package
MC9S08PA4AVTJ is housed in a 20-pin Thin Shrink Small Outline Package (TSSOP) with 0.65 mm pitch, JEDEC MO-153 compliant, thermal resistance RθJA = 115 °C/W on single-layer board. Pin assignments are validated per datasheet Rev. 10 (03/2020), Figure 1 and Table 9.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PTA0/KBI0P0/FTM0CH0/ACMP0/ADP0 | Port A bit 0 / KBI input 0 / FTM0 channel 0 / ACMP positive input / ADC channel 0 | Multi-function GPIO supporting keyboard interrupt wake-up, PWM output, analog comparison, and analog input - enables shared pin usage in compact designs. |
| PTA4/ACMPO/BKGD/MS | Port A bit 4 / ACMP output / Background debug / Master select | Output-only pin used for debug signaling and ACMP result output - requires external pull-up for open-drain compatibility during BDM entry. |
| PTA5/IRQ/FTM1CH0/RESET | Port A bit 5 / Interrupt request / FTM1 channel 0 / Reset input | Dual-role reset/interrupt pin with asynchronous IRQ path (100 ns pulse width guaranteed) - supports both system initialization and event-driven wake-up from low-power modes. |
| PTB0/KBI0P4/RxD0/TCLK0/ADP4 | Port B bit 0 / KBI input 4 / SCI0 receive / Timer clock 0 / ADC channel 4 | True open-drain output capable of sinking 20 mA - allows direct LED drive or level-shifting without external transistor. |
| PTB4/FTM1CH03 | Port B bit 4 / FTM1 channel 0 (high-drive) | Ultra-high-current sink/source pin (20 mA) - drives solenoids, relays, or high-brightness LEDs directly from MCU port. |
| VDD, VSS | Power supply and ground | Dedicated digital power (VDD) and ground (VSS) pins decoupled per datasheet layout guidelines - ensures stable core operation under dynamic load switching. |
| XTAL/EXTAL | Crystal oscillator input/output | Supports 31.25 kHz–20 MHz crystals or ceramic resonators - enables precise timing for RTC, UART baud rate generation, or synchronous peripheral interfaces. |
Key Features
| Feature | Design Value |
|---|---|
| Flash & EEPROM endurance | 100,000 program/erase cycles for flash; 100,000 erase cycles for EEPROM - supports long-term field firmware updates and nonvolatile parameter storage in industrial equipment. |
| ADC watermark buffering | Configurable data buffer with watermark interrupt - enables autonomous data acquisition without CPU polling, reducing active time and power consumption. |
| High-drive GPIO | Two dedicated 20 mA sink/source pins (PTB4, PTB5) - eliminates need for external driver transistors in actuator interface circuits. |
| Low-voltage detection | Selectable trip points (2.56–4.8 V) with hysteresis (40–100 mV) - prevents brown-out oscillation during supply sag in automotive or battery-operated systems. |
| Single-wire debug | BKGD pin enables background debug mode with three hardware breakpoints and on-chip ICE module - accelerates firmware validation without JTAG header footprint. |
Applications
| Motor Control Interface | Sensor Signal Conditioning |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers or small appliances using hall-effect feedback. IC Role / Device Role / Timing Role: MCU executes real-time PWM generation via FTM modules, reads hall sensors via GPIO/KBI, and regulates speed via ADC-measured current feedback. Use Value: Integrated 20 mA drive pins directly switch hall sensors; 12-bit ADC resolves current ripple at 2.5 µs/sample; stop3 mode enables ultra-low-power standby between cycles. |
Use Scenario: Analog sensor front-end for temperature, pressure, or gas detection in industrial process monitors. IC Role / Device Role / Timing Role: ADC digitizes conditioned analog signals; ACMP provides fast threshold detection; RTC timestamps events; SCI transmits data to host controller. Use Value: Internal bandgap reference ensures ADC accuracy across temperature; ACMP filtering reduces false triggers from EMI; EEPROM stores calibration coefficients persistently. |
| Automotive Body Control | Industrial I/O Expansion |
Use Scenario: Door module controlling window lift, mirror adjustment, and interior lighting in entry-level vehicles. IC Role / Device Role / Timing Role: SCI UART communicates LIN protocol with body controller; GPIO drives relays and LEDs; KBI detects switch presses; watchdog ensures fail-safe behavior. Use Value: LIN-capable SCI eliminates external transceiver; 20 mA GPIO sinks LED loads directly; LVD interrupts prevent erratic operation during battery voltage drop. |
Use Scenario: DIN-rail mounted I/O node aggregating digital inputs, analog inputs, and relay outputs for PLC peripheral expansion. IC Role / Device Role / Timing Role: MCU scans 8 KBI inputs for pushbutton/limit switch status; ADC monitors 0–10 V analog inputs; FTM generates PWM for proportional valve control. Use Value: 18 GPIOs with programmable pull-ups simplify wiring; 128 byte EEPROM retains configuration after power loss; stop3 mode cuts idle power to <2 µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC9S08PA8AVTJ | 8 KB flash (vs. 4 KB), same peripherals, identical pinout and package | Required when firmware exceeds 4 KB or future-proofing for feature expansion is needed | Select MC9S08PA8AVTJ only if additional flash capacity is confirmed necessary; no change to PCB or software architecture required. |
| S9KEAZ128AMLH | ARM Cortex-M0+ core, 128 KB flash, 16 KB RAM, higher performance but different instruction set and debug interface | Used where higher throughput, USB, or CAN is required - not drop-in compatible | Choose S9KEAZ128AMLH for new designs needing scalable performance; migration from MC9S08PA4AVTJ requires full firmware rewrite and layout review. |
Compared with MC9S08PA4AVTJ, MC9S08PA8AVTJ offers seamless flash scalability within the same footprint, while S9KEAZ128AMLH provides ARM-based upgrade path at the cost of architectural discontinuity - selection depends strictly on memory headroom versus long-term roadmap alignment.
Availability
MC9S08PA4AVTJ is available at Aetrix Electronics and suitable for motor control interface, sensor signal conditioning, automotive body control, and industrial I/O expansion requiring stable component supply across extended product lifecycles.
Supply support for MC9S08PA4AVTJ 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 applications, with broad MCU, RF, and security IP portfolios.
The MC9S08PA4AVTJ belongs to NXP's legacy S08 8-bit MCU family, engineered for deterministic real-time control in cost-sensitive embedded systems where reliability, low power, and peripheral integration outweigh raw compute performance.
FAQ
What is the maximum bus frequency supported by the MC9S08PA4AVTJ?
The MC9S08PA4AVTJ supports a maximum bus frequency of 20 MHz across its full operating voltage range (2.7–5.5 V) and temperature range (–40 to +105 °C). This frequency is achieved using either the internal clock source (ICS) with FLL or an external crystal/resonator up to 20 MHz. The device maintains timing compliance and flash access integrity at this speed without derating.
Does the MC9S08PA4AVTJ support in-application programming (IAP) of flash memory?
Yes, the MC9S08PA4AVTJ supports full in-application programming of its 4 KB flash memory - including read, program, and erase operations - over the entire operating voltage (2.7–5.5 V) and temperature (–40 to +105 °C) range. This capability enables field firmware updates and runtime parameter storage without requiring external programming hardware.
Which pins on the MC9S08PA4AVTJ provide 20 mA drive capability?
The MC9S08PA4AVTJ features two ultra-high-current pins: PTB4 and PTB5. Both support 20 mA sink/source drive strength at 3 V and 5 V supply levels, as verified in Table 3 of the datasheet Rev. 10. These pins are explicitly designated for driving LEDs, relays, or other medium-power loads without external buffers.
Can the MC9S08PA4AVTJ operate its ADC in low-power stop3 mode?
Yes, the MC9S08PA4AVTJ ADC remains fully functional in stop3 mode when configured with ADLPC = 1, ADLSMP = 1, ADCO = 1, MODE = 10B, and ADICLK = 11B. In this configuration, the ADC draws only 96.0 µA (at 5 V), enabling periodic sensor sampling while maintaining sub-µA system quiescent current - critical for battery-powered monitoring nodes.
What debug interface does the MC9S08PA4AVTJ use, and how many breakpoints does it support?
The MC9S08PA4AVTJ uses a single-wire background debug (BKGD) interface compliant with NXP's BDM specification. Its on-chip debug module supports exactly three hardware breakpoints during in-circuit debugging, allowing precise code inspection and real-time variable monitoring without JTAG overhead or additional pins.
MC9S08PA4AVTJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Series:
- S08
- Packaging:
- Tube
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- S08
- Core Size:
- 8-Bit
- Speed:
- 20MHz
- Connectivity:
- LINbus, SPI, UART/USART
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 4
- Program Memory Size:
- 4KB (4K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 128 x 8
- RAM Size:
- 512 x 8
- Voltage - Supply (Vcc/Vdd):
- 2.7V ~ 5.5V
- Data Converters:
- A/D 4x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
MC9S08PA4AVTJ FAQ
1.How can I place an order for MC9S08PA4AVTJ through Aetrix?
Please submit a Request for Quotation (RFQ) for MC9S08PA4AVTJ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC9S08PA4AVTJ reliable?
The price and inventory of MC9S08PA4AVTJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC9S08PA4AVTJ is usually 5 days.
3.What payment methods are accepted for MC9S08PA4AVTJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC9S08PA4AVTJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC9S08PA4AVTJ?
MC9S08PA4AVTJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC9S08PA4AVTJ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC9S08PA4AVTJ?
For technical support, including MC9S08PA4AVTJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC9S08PA4AVTJ requirements.
6.How does Aetrix verify that MC9S08PA4AVTJ is sourced from the original manufacturer or authorized distributors?
All MC9S08PA4AVTJ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC9S08PA4AVTJ meets industry standards.
7.What is the process for return or replacement of MC9S08PA4AVTJ?
All MC9S08PA4AVTJ units undergo pre-shipment inspection (PSI). If there is an issue with MC9S08PA4AVTJ, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC9S08PA4AVTJ part is unused and in its original packaging.
Return procedure for MC9S08PA4AVTJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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