MC9S08QE4CLC - 8-Bit 20MHz 4KB MCU | NXP | 32-LQFP
MPN: MC9S08QE4CLC ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.378 | $5.38 |
| 10 | $5.378 | $53.78 |
| 100 | $5.378 | $537.80 |
| 500 | $5.378 | $2,689.00 |
| 1,000 | $5.378 | $5,378.00 |
MC9S08QE4CLC Overview
A microcontroller is a programmable semiconductor that integrates a CPU core, memory, I/O ports, timers, serial interfaces, and other peripherals on one device. In the product hierarchy, MC9S08QE4CLC belongs to the S08QE 8-bit MCU family and uses the HCS08 architecture. Compared with a general-purpose processor, this MCU integrates the control functions needed to sense inputs, execute firmware, operate communication peripherals, and drive outputs on a single integrated circuit.
The verified listing identifies 4 KB of programmable Flash, 28 I/O ports, an 8-bit CPU, and operation up to 20 MHz. Mouser describes the device specifically as an 8-bit microcontroller with 4 KB Flash and 512 bytes of RAM. Flash supports resident firmware, while the I/O count provides a practical interface budget for buttons, indicators, sensors, actuators, and bus-connected circuitry. The LQFP package also exposes enough pins for power, ground, reset, clock, programming, communications, and discrete I/O.
MC9S08QE4CLC belongs to the S08QE family, identified in retrieved documentation as a pin-compatible 8-bit and 32-bit device duo within the Flexis series. Its architecture targets basic embedded-control applications rather than high-performance computing. The maximum 20 MHz frequency provides useful headroom for event handling, periodic timing, serial communication, and control loops, provided firmware observes the device's electrical and timing limits.
Typical uses include compact appliance controls, small motor-control modules, digital I/O modules, sensor interfaces, and industrial or consumer sub-systems. A designer should also account for the 1.8 V to 3.6 V supply range, validate every peripheral connection, and program the device with a tool supported by the complete NXP S08QE documentation. The verified search results do not provide enough information to enumerate every peripheral or programming-tool detail without risking unsupported claims.
PCB implementation should follow the package drawing and land pattern from the manufacturer datasheet, paying particular attention to supply decoupling, ground-return paths, programming access, and exposed test points. Because lifecycle information conflicts across search results, purchasing teams should confirm current status with NXP or an authorized distributor before committing a new design.
This page consolidates verified distributor specifications, the official NXP product link, the S08QE datasheet, and procurement observations into a design-oriented reference. It does not infer a replacement that has not been proven to share the exact 32-LQFP pinout, peripheral mapping, voltage range, memory organization, and programming behavior.
Drop-in alternatives for MC9S08QE4CLC — 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 MC9S08QE4CLC (same form factor and footprint) — differing in Flash Memory, Supply Voltage.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08QE64CLC
✅ Drop-In✓ In Stock
$6.1211 / Unit
View Datasheet →MC9S08QE8CTG
✅ Drop-In✓ In Stock
$6.3214 / Unit
View Datasheet →MC9S08QE4CLC Maximum Ratings & Electrical Characteristics
| CPU Architecture | HCS08, 8-bit |
| Maximum Clock Frequency | 20 MHz |
| Flash Memory | 4 KB |
| Flash Organization | 4K x 8 bits |
| RAM | 512 bytes |
| Supply Voltage Range | 1.8 V to 3.6 V |
| I/O Port Count | 28 |
| Package Type | 32-LQFP |
| Package Dimensions | 7 x 7 mm |
| Package Height | 1.40 mm maximum |
| Package Pitch | 0.80 mm |
| Mounting Type | Surface mount |
| ADC Resolution | 12-bit |
| Operating Temperature Range | -40 C to +85 C |
| Series | S08QE |
| Product Family | Flexis series |
MC9S08QE4CLC 0.80 mm Pin Configuration Guide
Pin configuration for MC9S08QE4CLC (0.80 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 MC9S08QE4CLC.
Refer to the datasheet for full pin configuration.
Typical Applications
MC9S08QE4CLC is suitable for 6 applications: Compact Appliance Control, Digital I/O Control Module, Low-Speed Motor Control, Industrial Sensor Interface, Battery-Powered Controller, Communication Gateway.
Compact Appliance Control
The MC9S08QE4CLC fits compact appliance-control boards that coordinate buttons, indicators, relays, and protection logic. Its 8-bit HCS08 core operates up to 20 MHz, while 4 KB of Flash and 512 bytes of RAM provide space for focused control firmware rather than a large application framework. With 28 reported I/O ports, the device can serve as the central state machine for user input and actuator sequencing. Firmware should use debouncing and timeout states for switches, while the 1.8 V to 3.6 V range requires compatible sensors and interface levels.
Recommended
Digital I/O Control Module
The MC9S08QE4CLC is suitable for a small digital I/O module because it combines 28 I/O ports with an 8-bit processor and 4 KB Flash. A practical implementation can assign inputs to interlocks, selectors, or field switches and use outputs for status LEDs, relay drivers, or logic-level enables. The 20 MHz clock supports responsive state-machine execution without a separate processor. Board design must include adequate bypassing, defined reset behavior, programming access, and protection for externally accessible signals.
Recommended
Low-Speed Motor Control
The MC9S08QE4CLC can manage low-speed motor-control functions when the design does not require a dedicated high-performance motor driver. Its 20 MHz HCS08 core can execute position or timing logic and coordinate limit inputs, command outputs, and fault reporting through the reported 28 I/O ports. The MCU is the controller, not the power stage; external drivers, protection, and current sensing remain necessary. Firmware should include startup delay, command timeout, and fail-safe output states.
Recommended
Industrial Sensor Interface
The MC9S08QE4CLC is a practical controller for a compact industrial sensor interface that must collect digital inputs, process them locally, and report status. Its 4 KB Flash and 512 bytes of RAM suit a focused acquisition and control routine, while the 20 MHz CPU supports timely polling and debounce handling. The listed 12-bit ADC feature may support analog measurement where the exact channel count and electrical limits are confirmed from the manufacturer datasheet. Industrial deployment also requires careful grounding, input conditioning, and lifecycle planning.
Recommended
Battery-Powered Controller
The MC9S08QE4CLC can serve as the supervisory controller in a small battery-powered product because its verified supply range starts at 1.8 V and extends to 3.6 V. The 4 KB Flash and 512 bytes of RAM fit simple battery-state, wake, timeout, and actuator-control functions. A production design must still evaluate sleep current, active current, regulator dropout behavior, and analog accuracy across the complete battery voltage range; those values are not present in the supplied snippets and must be taken from the manufacturer datasheet.
Recommended
Communication Gateway
The MC9S08QE4CLC may be used in a small protocol-conversion or status-gateway module when the firmware remains within its 4 KB Flash and 512 bytes of RAM. The 28 reported I/O ports can support a host interface, configuration inputs, status indicators, and a downstream serial link. Because the supplied data does not enumerate UART, SPI, CAN, or other peripheral variants, engineers must verify the exact ordering option and pin multiplexing before committing to this device. Existing PCB reuse is the strongest reason to select it.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08QE4CLC — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08QE64CLC | MC9S08QE8CTG |
|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
Key Differentiators
- Compact verified control-resource set (vs MC9S08QE64CLC)
- Exact procurement identity and package description (vs MC9S08QE8CTG)
- Documented low-voltage operating envelope (vs MC9S08QE64CLC)
Design Notes
Design the supply rail and every connected interface around the verified 1.8 V to 3.6 V range. Place local supply and ground-plane connections according to the manufacturer package and recommended-application layout, and provide normal bypassing close to the device. Do not infer a 5 V input-level tolerance from the package or family name; inspect the exact datasheet pin table before connecting external signals.
Preserve access to all programming and reset signals when laying out the 32-LQFP board. Because the supplied snippets do not expose the complete pinout, use the official MC9S08QE8 series datasheet to verify the footprint, exposed or central pads, programming interface, clock connections, and decoupling. Treat an unverified QFP land pattern as unsafe for production, even when nominal package dimensions appear similar.
Do not substitute another S08QE member solely because its family name or site page looks similar. MC9S08QE64CLC and MC9S08QE8CTG require pin-by-pin comparison, memory-capacity checks, voltage and timing verification, and peripheral-instance review. Also confirm the device's programming algorithm, mask or ROM configuration where relevant, and lifecycle position before replacing the MCU in an existing design.
Route clock, programming, and externally accessible signals away from noisy switching nodes and preserve continuous ground-return paths. I/O-driven relays, motors, or capacitive loads can inject transients even though the MCU itself is a low-voltage device; add appropriate isolation, clamping, and drive transistors where required. Validate worst-case traces and terminations against the actual peripheral configuration identified from the datasheet.
Compliance Information
No verified compliance statements were included in the supplied product, distributor, or datasheet-search snippets. Compliance fields remain unknown rather than inferred.
