MC9S08PA8VLD - 8-Bit 20MHz S08 Microcontroller | NXP
MPN: MC9S08PA8VLD ✗ End of LifeMC9S08PA8VLD Overview
A microcontroller is a semiconductor device that combines a processor core, memory, and configurable peripherals on one integrated circuit. The 8-bit S08 core belongs to the broader MCU category and is intended for embedded control rather than high-performance computing. MC9S08PA8VLD combines that processor architecture with flash, RAM, timer, ADC, and comparator resources, allowing a design to sense analog inputs, execute control logic, and operate external actuators from a relatively compact package.
The principal feature set supports cost-sensitive embedded applications. Eight kilobytes of flash provides room for the application program and fixed data, while 512 bytes of RAM support working variables and stack activity. The integrated 16-bit timer is useful for periodic scheduling, event counting, pulse measurement, and motor-control timing. The ADC supports analog measurement, and the analog comparator provides a lower-complexity threshold-detection function for sensor and protection circuits.
MC9S08PA8VLD is associated with cost-sensitive automotive and consumer applications, according to NXP product information. Its 44-LQFP package exposes more interface pins than a small-outline package and can simplify access to port pins, timer channels, analog inputs, debug functions, and power connections. The 10 mm by 10 mm body provides a practical land pattern for conventional through-hole assembly or mixed-technology PCB assembly, subject to the detailed pin and layout guidance in the NXP documentation.
Typical uses include automotive body and accessory controllers, consumer-control modules, small motor-control systems, appliance control boards, and compact sensing products. The timer and analog resources allow a single MCU to coordinate periodic actions and monitor external signals without requiring separate analog or timing ICs. This integration can reduce board area and simplify firmware architecture when the control algorithm does not require a higher-bit-width processor.
Design work should begin with the NXP datasheet pin-description table, electrical characteristics, and reference manual. Confirm the selected clock configuration, oscillator requirements, programming method, reset behavior, and decoupling requirements before layout. Because pin multiplexing and legacy 8-bit MCU timing can constrain peripheral assignments, validate every motor, ADC, and communication signal against the package pinout rather than relying on a generic S08PA board pattern.
This product page combines manufacturer status information, distributor specifications, package details, application guidance, and replacement screening. It also distinguishes verified device characteristics from parameters that must be confirmed in the official documentation, helping engineers plan assembly, firmware development, and lifecycle-aware sourcing without relying on generic MCU assumptions.
Drop-in alternatives for MC9S08PA8VLD — 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 MC9S08PA8VLD (same form factor and footprint) — differing in Package.
No drop-in alternatives available for this product.
Request AlternativesMC9S08PA8VLD Maximum Ratings & Electrical Characteristics
| Microcontroller Type | 8-bit MCU |
| Processor Core | S08 core |
| Maximum Clock Frequency | 20 MHz |
| Flash Memory | 8 KB (8K x 8) |
| RAM | 512 B |
| Timer Resolution | 16-bit |
| Analog-to-Digital Converter | Integrated ADC |
| Analog Comparator | Integrated analog comparator |
| Package | 44-LQFP (10 mm x 10 mm) |
| Pin Count | 44 pins |
| Mounting Type | Surface Mount |
| Product Status | NRND |
| Target Application | Cost-sensitive automotive and consumer applications |
MC9S08PA8VLD 44-lqfp (10 mm x 10 mm) Pin Configuration Guide
Pin configuration for MC9S08PA8VLD (44-lqfp (10 mm x 10 mm) 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 MC9S08PA8VLD.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08PA8VLD is suitable for 6 applications: Automotive Accessory Control, Consumer Appliance Control, Small Motor Control, Analog Sensor Interface, Compact Timer Control Module, Low-Cost Sequential Controller.
Automotive Accessory Control
MC9S08PA8VLD fits compact automotive accessory-control modules that need local logic, analog sensing, and periodic timing without a high-performance processor. Its 8-bit S08 core executes the control sequence, the 8 KB of flash stores application code, and the 512-byte RAM holds working variables. The integrated ADC supports physical inputs, while the analog comparator can perform threshold-based decisions. The 16-bit timer helps organize repetitive tasks or measure events. Because NXP identifies the device as NRND, use it primarily in established programs with an approved lifecycle plan, and validate temperature, voltage, qualification, and automotive interface requirements against the official documentation.
Recommended
Consumer Appliance Control
The MC9S08PA8VLD is appropriate for appliance controllers where a small control system must read switches or sensors and coordinate motors, heaters, indicators, or relays. The 8-bit processor is suitable for deterministic supervisory logic, while 512 bytes of RAM can hold state variables and stack activity. Its ADC supports analog sensing and the analog comparator can handle simple threshold events, reducing the need for external components. The 44-LQFP package provides a generous number of connections for control and debugging. Firmware planning should account for the limited 8 KB flash and use the NXP reference manual and device data sheet to establish exact pin multiplexing and peripheral constraints.
Recommended
Small Motor Control
MC9S08PA8VLD can coordinate small motor or actuator systems where the controller must interpret sensor inputs and issue timed control commands. The 16-bit timer provides a convenient basis for pulse generation, duty-cycle management, event counting, and periodic service routines. The ADC can monitor an analog feedback or current-related signal, and the analog comparator can detect a threshold quickly. Its 8 KB flash is adequate for compact supervisory firmware rather than computationally intensive motion algorithms. Layout should separate motor-return paths from sensitive analog and clock connections, and the designer should confirm timer-channel assignments and drive-current limits in the NXP documentation before selecting external transistors.
Recommended
Analog Sensor Interface
MC9S08PA8VLD is useful as a dedicated sensor-interface and decision controller when a design requires local analog measurement without a larger mixed-signal processor. The integrated ADC converts sensor voltage into digital values for filtering and threshold logic, while the analog comparator supports direct comparison against a reference. The S08 core can then perform local calculations, update a display or indicator, and manage a communications or control output. The 512-byte RAM places a clear boundary on buffering and stack requirements, so firmware should avoid large sample arrays. Confirm ADC resolution, reference voltage, input range, acquisition timing, and the selected sensor channel multiplexing from the manufacturer documentation.
Recommended
Compact Timer Control Module
The MC9S08PA8VLD fits compact modules whose principal function is deterministic timing rather than general-purpose computation. Its 16-bit timer can support periodic scheduling, pulse-width measurement, delayed events, and repetitive control sequences, while the analog comparator can qualify an external time or threshold signal. The 8 KB flash supports a focused state machine, and 512 bytes of RAM is sufficient for modest counters, schedules, and a small call stack. The 44-LQFP package makes external timing inputs, outputs, programming signals, and debug access straightforward to route. Validate oscillator accuracy, timer prescaler behavior, startup timing, and peripheral pin multiplexing before committing the circuit.
Recommended
Low-Cost Sequential Controller
MC9S08PA8VLD works well in a low-cost sequential controller that advances through predefined operating states and drives a small set of outputs. The 8-bit S08 core handles the state machine, the 16-bit timer establishes repeatable intervals, and the ADC or comparator can determine when a transition condition has been reached. Eight kilobytes of flash supports compact firmware with little need for external memory, while 512 bytes of RAM supports counters and a practical stack for modest call depth. The device's 44-LQFP footprint is appropriate when a maintainable assembly process and ample pin access are priorities. Check startup states, watchdog behavior, and I/O initialization requirements before production release.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08PA8VLD — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 44-LQFP (10 mm x 10 mm) |
| Brand | NXP Semiconductors |
| Microcontroller Architecture | 8-bit S08 core |
| Maximum Clock Frequency | 20 MHz |
| Flash Memory | 8 KB (8K x 8) |
| RAM | 512 B |
| Timer | 16-bit timer |
| Analog Features | ADC and analog comparator |
| Lifecycle Status | NRND |
| Target Applications | Cost-sensitive automotive and consumer applications |
Key Differentiators
- Integrated control and analog resources (vs MC9S08PA16)
- Focused 8-bit embedded-control platform (vs MC9S08QE4CLC)
- Established package format (vs MC9S08QE8CLC)
Design Notes
Use the MC9S08PA8VLD data-sheet pin-description table before assigning every 44-LQFP position. Separate external programming signals, reset circuitry, oscillator connections, timer outputs, ADC inputs, and general-purpose I/O into clear circuit groups. Place decoupling capacitance at the appropriate supply pins, keep sensitive analog traces away from switching return currents, and route clock and programming nets away from motor-drive paths. Because the MCU uses a legacy 8-bit architecture, a familiar S08 board cannot be reused without checking every multiplexed function.
Do not assume that devices with a similar MC9S08PA base number are drop-in replacements. Order suffixes may identify different package, temperature, or product options, and cross-family parts can differ in pin multiplexing even when their memory sizes appear similar. A valid substitution requires exact package dimensions, verified pin-to-pin assignments, compatible electrical limits, adequate memory and peripheral coverage, suitable software support, and confirmation of the required qualification and lifecycle status.
Design the supply network from the confirmed operating-voltage range and current limits in the manufacturer electrical-characteristics table. Select the regulator, bulk capacitance, and local decoupling to remain within the limits across temperature and load. Account for startup current, I/O drive loads, analog-reference behavior, and any peripheral current consumed in addition to the processor core. Validate brownout and reset behavior as well, particularly when the module must restart safely without an intermittent supply.
Place the MCU, its local decoupling, oscillator components, and reset network according to the reference layout and device requirements. Keep the analog input route short, maintain a continuous ground reference beneath the MCU where practical, and avoid routing high-current actuator returns beneath sensitive signals. If the ADC monitors a noisy source, use grounding and filtering techniques that address the actual noise source. Confirm external component values and tolerances against the electrical-characteristics table rather than copying values from a related family member.
Compliance Information
The manufacturer product page identifies automotive use and NRND status but does not state the requested compliance confirmations in the supplied excerpts.
