MC9S08JE128CMB - 8-Bit 48MHz 128KB Flash MCU | NXP
MPN: MC9S08JE128CMB ✗ End of Life| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
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| 500 | $0 | $0.00 |
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MC9S08JE128CMB Overview
A microcontroller is a programmable semiconductor device that integrates a processor core, memory, peripherals, and input/output interfaces on one package. The S08 MCU family belongs to the embedded-controller hierarchy: MCU -> microcontroller -> embedded processor -> semiconductor. This integration reduces component count and simplifies connections in control, communications, consumer, and industrial products.
The device offers 47 I/O lines and includes low-voltage detection, power-on reset, PWM, and a watchdog timer according to the supplied technical listing. Its 48 MHz maximum clock provides timing headroom for protocol handling and control loops, while the 128 KB Flash capacity supports embedded code and configuration data. The 12 KB SRAM provides working memory for firmware execution and data buffering.
MC9S08JE128CMB belongs to the S08JE family and is associated with the JE128 product class. Its peripheral mix supports serial communication designs, USB-enabled control products, and compact user-interface systems. The 81-MAPBGA package is particularly relevant to high-density designs where a smaller land pattern than a leaded package is important.
Typical applications include industrial control modules, USB-connected peripherals, compact consumer appliances, and embedded communication systems. Firmware should be reviewed for clock configuration, interrupt priorities, and peripheral initialization before deployment. The supplied distributor data indicates that some listings describe the part as obsolete, so lifecycle and inventory status should be confirmed before a new production design is approved.
For PCB work, preserve the exact ball map and thermal-pad requirements from the manufacturer package drawing. If programming, USB, or communications behavior is critical, validate the relevant peripheral tolerances and pin multiplexing in the device datasheet rather than relying only on distributor summaries. This page combines the supplied distributor data with engineering guidance while clearly identifying missing specifications.
Drop-in alternatives for MC9S08JE128CMB — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
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Request AlternativesMC9S08JE128CMB Maximum Ratings & Electrical Characteristics
| Core Processor | S08 Core |
| Core Size | 8-Bit |
| Maximum Clock Frequency | 48 MHz |
| Program Memory Size | 128 KB (128K x 8) |
| Program Memory Type | Flash |
| RAM Size | 12 KB |
| Number of I/O | 47 |
| Connectivity | I²C, SCI, SPI, USB |
| Peripherals | LVD, POR, PWM, WDT |
| Package | 81-MAPBGA (10 x 10 mm) |
| Mounting Type | Surface Mount |
| Manufacturer | NXP Semiconductors |
| Product Series | S08 S08 |
| EEPROM Size | - |
| RoHS Status | unknown |
MC9S08JE128CMB 81-mapbga (10 x 10 mm) Pin Configuration Guide
Pin configuration for MC9S08JE128CMB (81-mapbga (10 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 MC9S08JE128CMB.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08JE128CMB is suitable for 6 applications: USB-connected embedded control, Industrial sensor and actuator module, Consumer appliance controller, Serial communications gateway, USB peripheral interface card, HMI and keypad controller.
USB-connected embedded control
MC9S08JE128CMB fits compact USB-enabled control products because the supplied specification lists USB connectivity alongside an 8-bit S08 core, 128 KB of Flash, 12 KB of RAM, and 47 I/O lines. A practical implementation could place the MCU between a USB interface and a small sensor or actuator network, using firmware for device enumeration, command handling, and control-state updates. The 48 MHz clock provides more scheduling headroom than a basic low-speed 8-bit MCU, while 128 KB Flash leaves room for protocol and application code. Exact USB electrical limits, pin assignments, and supported modes must be verified from the manufacturer datasheet before layout release.
Recommended
Industrial sensor and actuator module
The MC9S08JE128CMB is suitable for a compact industrial module that reads sensors and drives actuators while communicating through I²C, SCI, or SPI. Its listed 47 I/O lines provide a useful device-level resource budget for digital inputs, outputs, status indicators, and peripheral multiplexing, and its PWM peripheral can support proportional actuator control. The 48 MHz S08 core can coordinate sampling, filtering, and communication tasks. Because the supplied data does not include supply voltage, temperature range, ADC specifications, or industrial qualification details, use it only after checking those requirements against the exact datasheet and enclosure environment.
Recommended
Consumer appliance controller
MC9S08JE128CMB can support a compact consumer appliance controller when the design needs local flash, moderate control-loop timing, and several serial peripherals. The 128 KB Flash capacity is more relevant than a tiny microcontroller profile for storing product firmware, operating modes, and diagnostic tables, while 12 KB RAM supports transient control and communication buffers. PWM can drive indicators, valves, or motor-control support circuitry, and SCI or I²C can connect sensors and human-interface electronics. The part is listed as obsolete, so appliance makers should validate lifecycle availability and consider a current redesign path for volume production.
Recommended
Serial communications gateway
The listed SCI and SPI interfaces make MC9S08JE128CMB a candidate for a small protocol-conversion or communications gateway when the product must bridge a local bus to a host interface. Its 48 MHz S08 core can manage interrupt-driven traffic and protocol state machines, and its 128 KB Flash provides room for multiple firmware routines and configuration tables. I²C and USB can add sensor or host connectivity, while the watchdog can help recover from software faults. The exact baud-rate limits, electrical standards, pin muxing, and timing margins are not supplied, so board-level signal integrity and firmware timing must be validated.
Recommended
USB peripheral interface card
MC9S08JE128CMB is relevant to a compact USB peripheral interface card because the supplied data explicitly lists USB connectivity and an 81-MAPBGA package. A board can use the MCU to decode host commands, update indicators, and supervise external relays or sensors while retaining 128 KB Flash for firmware. The 47 available I/O lines and 48 MHz clock can support a structured interrupt-driven design, but the actual USB implementation depends on the package pinout, transceiver or internal USB support, power requirements, and firmware stack. Confirm those items in the datasheet and validate enumeration across representative hosts.
Recommended
HMI and keypad controller
MC9S08JE128CMB can serve as the controller for a small human-machine interface containing a keypad, display interface, status LEDs, and configurable controls. The 47 I/O lines offer a useful starting point for scanning and output control, while SCI, SPI, I²C, and USB can connect different display or input technologies. PWM may be useful for dimming indicators or driving small actuator signals, and POR plus watchdog features support reliable startup and recovery. Because the supplied data omits display-specific timing, electrical characteristics, and pin multiplexing, the MCU should be selected only after the complete HMI interface and its voltage levels are mapped.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08JE128CMB — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Package | 81-MAPBGA (10 x 10 mm) |
| Brand | NXP Semiconductors |
| Core | S08 8-Bit |
| Maximum Clock | 48 MHz |
| Program Memory | 128 KB Flash |
| RAM | 12 KB |
| Connectivity | I²C, SCI, SPI, USB |
| Lifecycle | Obsolete |
Key Differentiators
- Integrated connectivity set (vs Generic 8-bit MCU without USB)
- Memory density for embedded firmware (vs MC9S08JE64 family member)
- Package-level integration (vs Larger leaded package alternative)
- Lifecycle limitation (vs Current-production MCU platform)
Design Notes
Treat the 81-MAPBGA package as a high-density routing problem. Use the manufacturer package drawing as the authority for ball locations, power and ground assignments, and exposed-pad requirements. Route high-speed or sensitive USB and serial signals with controlled reference planes, minimize stubs, and place required support components close to their associated balls. Do not infer a pinout from distributor search snippets.
The part is listed as obsolete, so avoid silently substituting a related S08 or Microchip MCU based only on similar flash size or clock rate. Record the original ballout, supply rails, peripheral assignments, clock configuration, and firmware dependencies. Validate any migration for USB, SCI, SPI, I²C, PWM, watchdog, reset behavior, and programming before using it in a new production board.
The supplied data confirms Flash, RAM, I/O, communications, and peripheral functions but does not provide supply voltage or current limits. Before power-design work, retrieve the exact electrical characteristics and confirm which peripherals are active simultaneously. Include local decoupling and power-sequence margin appropriate to the manufacturer requirements, then validate the design across startup, reset, idle, communications, and maximum-processing states.
USB and serial interfaces can be sensitive to board-level return paths and power noise even when the MCU is otherwise operated as a low-power control device. Keep communication routing away from switching nodes and noisy power inductors, provide continuous ground references, and follow the datasheet’s external-component recommendations. Test signal levels, edge rates, bus loading, and firmware timing at the intended operating conditions rather than relying on nominal logic specifications.
Compliance Information
Compliance status was not provided in the verified web data or internal database data. The MCU is not identified as automotive-qualified; do not infer AEC-Q100 status from the application list.