MC908JL3ECDWE - 8-Bit 8MHz 4KB MCU | NXP | 28-SOIC
MPN: MC908JL3ECDWE ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.0657 | $6.07 |
| 10 | $6.0657 | $60.66 |
| 100 | $6.0657 | $606.57 |
| 500 | $6.0657 | $3,032.85 |
| 1,000 | $6.0657 | $6,065.70 |
MC908JL3ECDWE Overview
An MCU is a semiconductor that integrates a processor core, program memory, data memory, and peripherals into one device. A microcontroller is therefore more specific than a general-purpose microprocessor: the embedded system can execute firmware and control I/O without requiring a separate external memory device. In the M68HC08 hierarchy, this device is an 8-bit MCU using the CPU08 central processing unit.
Verified distributor information identifies the MC908JL3ECDWE as an HC08 device with 8-bit architecture, 8 MHz operation, and 4 KB, or 4K by 8, Flash memory. Its 28-SOIC package supports surface mounting on existing legacy boards. The listed 3.3 V and 5 V compatibility is useful when servicing equipment designed around either supply level. Exact RAM, peripheral, electrical-limit, and temperature-range values were not supplied in the verified search data and therefore remain marked for data confirmation.
Typical uses for this class of controller include appliance controls, industrial equipment, instrumentation, simple motor-control nodes, and legacy embedded systems. Before substituting any MPN, engineers should compare the complete pinout, memory map, clock behavior, interrupt vector table, peripherals, electrical limits, and firmware compatibility. A matching package alone does not guarantee a functional drop-in replacement.
For a new design, prioritize an NXP part that NXP currently recommends for new designs. For an existing board, preservation of the original part number is preferable because changing instruction sets, peripherals, pin multiplexing, or memory organization can require firmware and hardware changes. The SOIC footprint is also larger than many current MCU packages, although that difference may be irrelevant when repairing an existing PCB.
Drop-in alternatives for MC908JL3ECDWE — 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 MC908JL3ECDWE (same form factor and footprint) — differing in Package, Program Memory Size, Core, Core Architecture, Lifecycle Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
No drop-in alternatives available for this product.
Request AlternativesMC908JL3ECDWE Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit microcontroller unit (MCU) |
| Architecture | 8-bit HC08 CISC |
| CPU | M68HC08 CPU08 core |
| Maximum Clock Frequency | 8 MHz |
| Flash Memory | 4 KB (4K x 8) |
| Program Memory Type | Flash |
| Supply Compatibility | 3.3 V and 5 V |
| Package | 28-pin SOIC wide |
| Mounting Type | Surface mount |
| Series | MC908 |
| Microcontroller Family | M68HC08 |
| Lifecycle Status | Obsolete |
| Lead-Free Status | PB-free finished goods |
| Program Memory Words | 4096 x 8 bits |
| Maximum Pin Count | 28 pins |
MC908JL3ECDWE 28-pin soic wide Pin Configuration Guide
Pin configuration for MC908JL3ECDWE (28-pin soic wide 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 MC908JL3ECDWE.
Refer to the datasheet for full pin configuration.
Typical Applications
MC908JL3ECDWE is suitable for 6 applications: Legacy Appliance Control, Industrial Instrumentation Repair, Simple Motor-Control Node, Embedded Data Acquisition, IoT Sensor Gateway Retrofit, Educational Electronics Platform.
Legacy Appliance Control
The MC908JL3ECDWE fits maintenance of an appliance controller that was designed around the 8-bit M68HC08 family, an 8 MHz operating point, and 4 KB of Flash. Its 28-SOIC package allows reuse of the original board footprint when components have been removed. The verified 3.3 V and 5 V compatibility can simplify inspection across related equipment revisions. Because the MCU is obsolete, engineers should prefer an exact original part, verify its date code, and preserve the existing firmware rather than assuming that a family variant is interchangeable.
Recommended
Industrial Instrumentation Repair
The 8-bit CPU08 architecture and 4 KB program memory make the MC908JL3ECDWE relevant to legacy instruments that perform compact sequencing, measurement conditioning, status reporting, or actuator control. An 8 MHz clock supports the original product's control tasks, while the 28-SOIC package preserves established routing. For maintenance, first confirm the exact MCU marking and compare reset and peripheral connections. A newer controller should be selected for long-term availability when a redesign is acceptable, with firmware and board validation planned in parallel.
Recommended
Simple Motor-Control Node
The MC908JL3ECDWE can be retained in a legacy low-speed motor-control or sequencing node when the existing firmware already matches its CPU08 core, 4 KB Flash, and peripheral configuration. Its 8 MHz operation and surface-mount 28-SOIC construction suit compact control boards built around the original design. Supply voltage must match the supported 3.3 V or 5 V equipment architecture. Do not substitute solely by family name, because timer channels, pin multiplexing, edge behavior, and drive timing must remain compatible with the existing firmware and power stage.
Recommended
Embedded Data Acquisition
The MC908JL3ECDWE can support a legacy acquisition controller when it performs sensor selection, digital filtering, status logging, and communication through already verified board peripherals. Its 4 KB Flash constrains firmware size, while the 8 MHz HC08 core matches the processing assumptions of the original product. For an operating instrument, exact-part preservation reduces the chance of introducing sampling or timing changes. Confirm sensor interfaces, serial baud-rate support, ADC resources, and calibration routines from the complete manufacturer documentation before installation.
Recommended
IoT Sensor Gateway Retrofit
The MC908JL3ECDWE may serve in a brownfield IoT retrofit where an existing 28-SOIC controller board reads local sensors and drives indicators or relays. The verified 8 MHz HC08 performance and 4 KB Flash are suitable only when the current firmware already fits that resource envelope. Compatibility with 3.3 V and 5 V helps during mixed-generation repairs. For connected equipment, cybersecurity and long-term supply constraints favor a supported MCU unless preserving the old controller is essential; any communication implementation should be audited before field deployment.
Recommended
Educational Electronics Platform
The MC908JL3ECDWE remains useful for training an existing HC08 laboratory board because students can preserve the original CPU08 firmware, 28-SOIC footprint, and 8 MHz operating assumptions. It provides a concrete platform for studying an 8-bit CISC microcontroller, embedded memory, reset behavior, interrupts, and peripheral control. Because the part is obsolete, schools should inventory test samples and plan a planned migration before acquiring large quantities. Replacement boards should use a supported MCU and updated teaching material rather than treating unrelated HC08 models as pin-compatible.
Recommended
Recommended Products Summary
Engineering reference data for MC908JL3ECDWE — comparison, design guidance, and compliance information.
Selection Guide
Key Differentiators
- Original CPU08 architecture and memory configuration (vs MC908JL3EMDWE)
- Exact-part maintenance support (vs MC908JK8CDWE)
- Known supply-voltage compatibility (vs MC908JK1ECDWER)
Design Notes
Do not infer pin compatibility from an HC08 family name. Confirm the exact package suffix, all 28 pin assignments, programming signals, reset behavior, clock pins, and alternate peripheral functions against the manufacturer data sheet. Several related MC908 identifiers appeared in the supplied search results, but no candidate was proven to be a drop-in replacement. For maintenance, use the original MPN whenever possible and verify the device marking, pin count, and supply requirements before soldering.
Identify whether the target board uses 3.3 V or 5 V before replacing the MCU. Both levels are mentioned in the verified source snippets, but maximum voltage, current, and detailed operating limits are not supplied. Check the board's regulator ratings, decoupling, reset pull-up, and programming-interface voltage. Misconnecting VDD or exposing an unsupported input voltage can permanently damage an obsolete replacement that may be difficult to source.
Preserve the original 28-SOIC land pattern and verify the package variant is the wide-body form associated with the target board. Inspect whether any replacement candidate has different terminal width, lead pitch, pin numbering, or exposed thermal features; the supplied evidence does not establish such compatibility. Clean pad oxidation, use appropriate lead-free rework profiles, and inspect the underside for bridging after reflow because adjacent 28-pin pads can short if solder bridges are not removed.
Compliance Information
Mouser identifies the part as PB-free finished goods. Explicit RoHS, REACH, halogen-free, and conflict-minerals statements were not present in the supplied verified data.
