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HomeProductsIntegrated Circuits (ICs)Embedded - MicrocontrollersS9S12G128F0MLL
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S9S12G128F0MLL - NXP USA Inc.

Manufacturer Part Number
S9S12G128F0MLL
Manufacturer
NXP Semiconductors
Allelco Part Number
32D-S9S12G128F0MLL
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
5,949 pcs available, New & Original
Parts Description
IC MCU 16BIT 128KB FLASH 100LQFP
Package
100-LQFP (14x14)
Data sheet
S9S12G128F0MLL.pdf

PCN Assembly/Origin

2.73KHz.pdf
RoHs Status
ROHS3 Compliant
Compare
Our certification
In stock: 5949
  • Unit Price: $3.802
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $3.802 $3.80
10+ $3.643 $36.43
30+ $3.367 $101.01
90+ $3.125 $281.25
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

S9S12G128F0MLL Tech Specifications
NXP USA Inc. - S9S12G128F0MLL technical specifications, attributes, parameters and parts with similar specifications to NXP USA Inc. - S9S12G128F0MLL

Product Attribute Attribute Value
Manufacturer NXP Semiconductors
Voltage - Supply (Vcc/Vdd) 3.13V ~ 5.5V
Supplier Device Package 100-LQFP (14x14)
Speed 25MHz
Series HCS12
RAM Size 8K x 8
Program Memory Type FLASH
Program Memory Size 128KB (128K x 8)
Peripherals LVD, POR, PWM, WDT
Package / Case 100-LQFP
Package Tray
Product Attribute Attribute Value
Oscillator Type Internal
Operating Temperature -40°C ~ 125°C (TA)
Number of I/O 86
Mounting Type Surface Mount
EEPROM Size 4K x 8
Data Converters A/D 12x10b
Core Size 16-Bit
Core Processor 12V1
Connectivity CANbus, IrDA, LINbus, SCI, SPI
Base Product Number S9S12

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 3 (168 Hours)
REACH Status REACH Unaffected
ECCN EAR99
HTSUS 8542.31.0001

Parts Introduction

Manufacturer Part Number

S9S12G128F0MLL

Manufacturer

NXP Semiconductors

Introduction

HCS12 Microcontroller with Integrated Flash Memory for Embedded Applications

Product Features and Performance

16-Bit Core Processor (12V1)

25MHz Operating Speed

CANbus, IrDA, LINbus, SCI, SPI Connectivity Options

Low Voltage Detection, Power-On Reset, Pulse Width Modulation, Watchdog Timer Peripherals

86 General Purpose Input/Output Pins

128KB Flash Memory

4KB EEPROM

8KB RAM

Internal Oscillator

Product Advantages

Efficient 16-Bit Performance for Handling Complex Tasks

Robust Serial Communication Capabilities through Multiple Interfaces

Ample Memory for Advanced Applications

High Integration Facilitates Compact and Cost-effective Designs

Wide Operating Temperature Range for Harsh Environments

Key Technical Parameters

Core Size: 16-Bit

Speed: 25MHz

Program Memory Size: 128KB FLASH

EEPROM Size: 4KB

RAM Size: 8KB

Voltage - Supply: 3.13V to 5.5V

Data Converters: 12-Channel, 10-Bit A/D

Number of I/O: 86

Mounting Type: Surface Mount

Package/Case: 100-LQFP

Quality and Safety Features

Low Voltage Detection for Reliable Operation

Power-On Reset to Assure Predictable Startup Behavior

Watchdog Timer to Recover from Malfunctioning Software

Compatibility

Compatible with a Range of Development Tools from NXP

Supports Standard Communication Protocols

Application Areas

Automotive Systems

Industrial Controls

Consumer Electronics

Medical Devices

Agricultural Equipment

Product Lifecycle

Active Product Status

Supported by NXP with Ongoing Production (No Near Discontinuation)

Several Key Reasons to Choose This Product

Advanced Integration Reducing Additional Components for System Design

Suitable for Real-time Control Applications

Supports Wide Range of Operating Voltages for Versatile Power Supply Design

Large Number of I/O for Enhanced Peripheral Control

Designed for Demanding Operating Conditions

Strong Community and Manufacturer Support for Development

Frequently Asked Questions(FAQ)

How does the S9S12G128F0MLL compare to other HCS12 family microcontrollers in terms of program memory and I/O availability for industrial motor control applications?
The S9S12G128F0MLL offers 128KB of on-chip FLASH memory and 86 general-purpose I/O pins, providing sufficient code storage and peripheral interfacing for complex industrial motor control systems. When compared to smaller variants like the S9S12G64F0MLL (64KB FLASH, 72 I/O), the G128 provides nearly double the program space and additional I/O, making it better suited for multi-motor or sensor-rich implementations. However, it consumes slightly more power and requires a larger footprint than compact alternatives. For applications requiring real-time feedback loops, CANbus integration, and PWM generation—typical in motor drives—the expanded resources of the G128 variant reduce external component count and simplify PCB layout.
What are the key considerations when selecting an oscillator configuration for the S9S12G128F0MLL in automotive-grade temperature environments?
While the S9S12G128F0MLL includes an internal oscillator, its accuracy (±1–2% typical) may not meet stringent timing requirements in precision automotive applications. In -40°C to +125°C operating ranges, crystal-based external oscillators offer superior stability (±20 ppm or better). Using an external 8 MHz crystal with a load capacitance matching the MCU’s specified 20 pF enables precise 25 MHz system clocking via PLL, ensuring reliable communication over LINbus or CAN at high baud rates. Internal oscillator use reduces BOM cost and board space but introduces jitter that can affect A/D sampling integrity or UART synchronization.
Can the S9S12G128F0MLL reliably drive high-current loads such as relays or solenoids directly from its GPIO pins?
No, the S9S12G128F0MLL’s GPIO pins are designed for logic-level signals only, typically sourcing/sinking up to 25 mA per pin and 100 mA total across all ports. Driving inductive loads like relays or solenoids requires external buffering components. A common solution is to use a transistor (e.g., NPN BJT or MOSFET) controlled by a GPIO pin, with flyback diodes across the coil. This isolates the MCU from voltage spikes during de-energization and prevents damage to internal ESD protection structures. Direct connection risks latch-up or permanent failure due to back EMF.
What impact does operating near the upper voltage limit (5.5V) have on the S9S12G128F0MLL’s analog performance?
Operating at 5.5V—close to the maximum Vcc of 5.5V—can degrade the performance of the integrated 10-bit ADC in the S9S12G128F0MLL. Although the datasheet specifies ±2 LSB integral nonlinearity (INL) under nominal conditions, higher supply noise and reduced headroom can increase effective resolution loss, especially in low-amplitude sensor inputs. For accurate measurements below 1V full-scale, a regulated 3.3V supply improves signal-to-noise ratio and enhances ADC linearity. If 5.5V must be used (e.g., interfacing with legacy systems), proper decoupling capacitors (≥10 µF bulk + 0.1 µF ceramic) near the Vcc pin are essential to maintain stable reference voltages.
How should bootloader design account for the flash memory architecture of the S9S12G128F0MLL during firmware updates?
The S9S12G128F0MLL uses a segmented flash organization where the first 4KB is often reserved for boot code, and application code resides in subsequent blocks. Bootloaders must implement sector erase/write routines compliant with the Freescale/NXP flash controller protocol, including unlock sequences and verify-after-write checks. Since flash endurance is limited (~10k cycles), wear leveling algorithms may be needed if frequent updates occur. Additionally, interrupt vectors must be redirected during update mode to prevent corruption. Using the built-in background debug module (BDM) or SCI/UART interface allows safe in-system programming without removing the device.
What trade-offs exist between using the internal versus external watchdog timer in designs employing the S9S12G128F0MLL?
The S9S12G128F0MLL includes a robust on-chip watchdog timer (WDT) with programmable timeout periods (typically 1–16 seconds depending on clock source). Relying solely on the internal WDT saves external components but risks false resets if software hangs in interrupt handlers without timely feed commands. Adding an external RC-based watchdog provides redundancy but increases component count and calibration complexity. For safety-critical applications, combining both—using the internal WDT as primary and monitoring its operation with an external supervisor—offers fault detection without sacrificing reliability. However, this adds cost and board area.
Is the S9S12G128F0MLL suitable for battery-powered devices requiring long-term operation under low duty cycles?
Not ideally. The S9S12G128F0MLL operates at 3.13–5.5V and draws active current around 15 mA at 25 MHz, which is relatively high for energy-constrained systems. While it supports stop modes reducing consumption to microamps, wake-up latency and recovery overhead diminish battery life benefits. For ultra-low-power designs (e.g., wireless sensors), newer architectures like ARM Cortex-M0+ or specialized MCUs are more efficient. However, if legacy code compatibility, CAN/LIN connectivity, or existing toolchains justify its use, careful sleep scheduling and clock gating can extend runtime—though not to the levels achievable with purpose-built low-power MCUs.
How does the choice of package (100-LQFP vs. alternative forms) affect thermal management in high-temperature environments for the S9S12G128F0MLL?
The 100-LQFP (14x14 mm) package of the S9S12G128F0MLL provides good solder joint reliability and moderate heat dissipation due to exposed pads and thermal vias. In continuous operation at 125°C ambient, junction temperatures may exceed safe limits (~150°C) without copper planes or heatsinks, potentially triggering thermal shutdown or accelerated aging. Compared to BGA packages with lower thermal resistance, the LQFP has higher θJA (~45°C/W estimated), meaning heat spreads slowly through the PCB. Designers should allocate inner-layer ground/power planes adjacent to the MCU and avoid routing high-current traces underneath to prevent localized heating.
What precautions are necessary when cascading multiple S9S12G128F0MLL-based nodes on a shared LINbus network?
Cascading LINbus nodes using the S9S12G128F0MLL requires attention to slew rate control, bus termination, and wake-up signaling. The MCU’s LIN transceiver output must comply with LIN 2.1 specifications (max 20 kHz bit rate, ≤100 mV undershoot). Without proper series resistors (typically 1 kΩ) at each node’s TX line, reflections degrade signal integrity. Also, only one master node should initiate communication; slaves must remain silent until addressed. Firmware must handle wake-up detection via LIN ID filtering and avoid bus contention during sleep transitions. Termination resistors (1 kΩ to GND) at segment ends reduce ringing, particularly in long cable runs.
Can the S9S12G128F0MLL interface directly with 5V logic peripherals such as older sensors or displays?
The S9S12G128F0MLL accepts I/O voltages up to 5.5V (within its supply range), but its core logic operates at Vdd. Connecting 5V TTL signals directly to Vdd = 3.3V lines risks exceeding absolute maximum ratings on input thresholds. Instead, level shifting via open-drain buffers (e.g., 74HC125) or bidirectional translators (TXB0108) ensures compatibility. Alternatively, configuring unused I/O as open-collector with pull-ups to 5V allows bidirectional handshake without damaging the MCU. Direct 5V CMOS input without voltage regulation is unsafe unless Vdd is also 5V and noise margins permit reliable recognition of logic high.
What role does the Power-on Reset (POR) circuit play in ensuring reliable startup of the S9S12G128F0MLL in noisy industrial settings?
The POR circuit monitors Vdd and ensures the S9S12G128F0MLL remains in reset until Vdd stabilizes above ~3.0V. In environments with brownout transients or slow ramp-up (e.g., hot-plug scenarios), inadequate bypassing or large bulk capacitance can delay POR release, causing undefined states. A well-designed system includes a 10 µF tantalum capacitor near Vdd plus a 0.1 µF ceramic capacitor to filter high-frequency noise. Additionally, the Low-Voltage Detect (LVD) feature can trigger software-safe shutdown if Vdd drops below 3.13V, preventing erratic behavior during voltage dips. Proper decoupling minimizes false resets due to transient dips.
How does the flash write/erase cycle time affect development iteration speed when prototyping with the S9S12G128F0MLL?
Flash memory in the S9S12G128F0MLL requires ~5 ms per 256-byte page erase and ~2 ms per 16-byte write operation under typical conditions. Updating 1 KB of code thus takes roughly 20 ms (erase) + 128 ms (writes) ≈ 148 ms, which becomes noticeable during rapid debugging cycles. Developers often use RAM-based execution or partial flash updates to mitigate delays. Tools like CodeWarrior or S12 Debugger support flash caching or overlay techniques. For faster turnaround, linking frequently modified functions into a separate, infrequently erased flash section reduces total programming time significantly.
Are there any known limitations in using the SPI peripheral simultaneously with the ADC on the S9S12G128F0MLL?
The S9S12G128F0MLL shares internal buses among peripherals, so simultaneous SPI transmission and ADC conversion can cause data corruption if not coordinated properly. The ADC results register may be overwritten before read by an SPI ISR running at high priority. Best practice involves disabling interrupts during critical ADC reads or using DMA-like transfer via the crossbar switch (if available). Alternatively, polling the ADC flag before servicing SPI avoids race conditions. Timing analysis shows worst-case latency of ~1–2 µs between ADC completion and next conversion start, which is acceptable for <100 kSPS sampling but demands careful ISR prioritization.
What factors determine whether to choose the S9S12G128F0MLL over a modern 32-bit MCU for a legacy automotive control unit redesign?
Migration from the S9S12G128F0MLL to a 32-bit MCU depends on software investment, certification status, and real-time constraints. Existing C code written for the HCS12 architecture may require significant porting effort to run efficiently on ARM Cortex cores. However, 32-bit MCUs offer better power efficiency, richer peripherals, and enhanced security features. If the application relies heavily on proven timing-critical loops (e.g., PWM dead-time control), verifying equivalent deterministic behavior on a new platform is crucial. Substituting the G128 with a functionally compatible part like the S9S12G128AMLL may suffice without major changes, preserving development timelines and qualification efforts.

Parts with Similar Specifications

The three parts on the right have similar specifications to NXP USA Inc. S9S12G128F0MLL

Product Attribute S9S12G128F0MLF S9S12G128F0VLLR S9S12G128F0CLL S9S12G128F0CLLR
Part Number S9S12G128F0MLF S9S12G128F0VLLR S9S12G128F0CLL S9S12G128F0CLLR
Manufacturer NXP USA Inc. Freescale Semiconductor NXP USA Inc. NXP USA Inc.
Voltage - Supply (Vcc/Vdd) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Number of I/O - - - -
Program Memory Size - - - -
Program Memory Type - - - -
Speed - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Connectivity - - - -
Core Size - - - -
Core Processor - - - -
EEPROM Size - - - -
Data Converters - - - -
Series - - - -
Oscillator Type - - - -
Peripherals - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Mounting Type - Surface Mount Through Hole Surface Mount
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Operating Temperature - -40°C ~ 85°C 0°C ~ 70°C -40°C ~ 85°C
RAM Size - - - -

S9S12G128F0MLL Datasheet PDF

Download S9S12G128F0MLL pdf datasheets and NXP USA Inc. documentation for S9S12G128F0MLL - NXP USA Inc..

Datasheets
MC9S12G Family Datasheet.pdf
PCN Packaging
All Dev Label Update 15/Dec/2020.pdf Mult Dev Pkg Seal 15/Dec/2020.pdf
PCN Assembly/Origin
2.73KHz.pdf
PCN Design/Specification
MC9S12G DS Rev 10/May/2021.pdf Mult Dev 25/May/2020.pdf
Environmental Information
NXP USA Inc REACH.pdf NXP USA Inc RoHS Cert.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

  • Dani***alkerTech
    Jun 1, 2026

    Product works, but setup took more effort than expected. Once configured the MCU ran reliably, although documentation support felt older compared with newer platforms. Fine for maintenance projects.

  • Yuki***aka88
    May 26, 2026

    信号通信プロジェクトでこのRS-485トランシーバーを使用しました。設置は簡単で、長距離ケーブルでも通信は安定していました。消費電力も、以前使用していたものより低くなっています。

  • Stev***aker
    May 20, 2026

    Solid diode for power rectification. Works well in switching circuits.

  • Bran***Lewis
    May 11, 2026

    Compact FPGA with good performance. Suitable for basic signal processing tasks.

  • Oliv***arris
    May 7, 2026

    Reliable I/O expander. Works well in embedded control applications.

  • Jess***Jones
    Apr 17, 2026

    It offers good value for the price, and the specifications match the description. I’ve been using it for two days with no issues, and I’ll definitely buy it again if I need it in the future.

  • Mich***Smith
    Apr 17, 2026

    Shipping was on time, the component pins are neatly aligned, and I tested 10 of them with a multimeter—all readings were within the specified range. Highly recommended.

  • Aman***arris
    Apr 3, 2026

    It was great—the entire process, from placing the order to receiving the package, went very smoothly. The components were consistent, the price was fair, and I had a very pleasant shopping experience.

  • Mike***nch
    Apr 3, 2026

    Better than expected! The resistance and capacitance readings were spot-on, and it passed the test on the first try. The service was reliable, and the packaging was thoughtful—I highly recommend it.

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Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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Certifications & Memberships

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NXP USA Inc.

S9S12G128F0MLL

NXP USA Inc.
32D-S9S12G128F0MLL

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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