MC9S08QE32CLCR - 8-bit S08 MCU, 32KB Flash, 50MHz | NXP
MPN: MC9S08QE32CLCR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.45 | $34.50 |
| 100 | $2.95 | $295.00 |
| 500 | $2.55 | $1,275.00 |
| 1,000 | $2.2 | $2,200.00 |
MC9S08QE32CLCR Overview
An 8-bit microcontroller (MCU) is a microprocessor integrated with program memory (Flash/ROM), data memory (RAM), and peripheral subsystems on a single silicon die. The S08 family from NXP uses a CISC (Complex Instruction Set Computer) core that runs an HC08-extended instruction set, allowing dense object code and easy migration from legacy HC08 and HCS08 designs. Within the broader taxonomy, the S08 sits below 16-bit S12/MagniV devices and 32-bit Kinetis / LPC MCUs, occupying the cost-optimized tier where GPIO count and on-chip analog integration dominate BOM savings.
Key features of the MC9S08QE32CLCR include operation from a 2.5 V to 3.3 V supply (with 5 V-tolerant I/O on selected pins), an internal clock source with an external reference option, low-power stop and wait modes, an on-chip LCD driver capable of driving segment displays, a 12-bit ADC, and hardware CRC. The integrated peripherals reduce external component count and shrink PCB area in HMI, metering, and small-appliance designs.
The device is built on NXP's proven S08 process and includes a built-in BDM (Background Debug Mode) interface for non-intrusive in-circuit debug and Flash programming. Hardware breakpoints, real-time bus capture, and a security mechanism that prevents unauthorized Flash readout are accessible through the BDM port, supporting both production programming and field firmware revisions. The integrated low-power oscillator and the S08 RTC block reduce BOM cost in battery-backed applications.
Typical applications for the MC9S08QE32CLCR include home-appliance control boards (washing machines, microwave ovens), low-end industrial sensor transmitters, building-automation thermostats and HVAC controllers, consumer remote controls and small HMI panels with LCD displays, and battery-powered metering devices where the on-chip LCD driver eliminates an external display driver IC.
When designing with the MC9S08QE32CLCR, verify the supply-rail decoupling scheme (a 100 nF plus 10 uF combination near the device), confirm the BDM pin map against your debug probe, and account for the LCD driver's segment-current budget when selecting the display. Routing the analog VREF pin separately from digital switching currents preserves ADC accuracy.
This page synthesizes distributor pricing, drop-in alternatives within the S08QE family, application guidance, and practical design notes not found in the standalone NXP data sheet.
Drop-in alternatives for MC9S08QE32CLCR — 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 MC9S08QE32CLCR (same form factor and footprint) — differing in Package, Supply Voltage, Program Memory Size, ADC, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MC9S08QE32CLC
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08QE64CLC
✅ Drop-In✓ In Stock
$6.1211 / Unit
View Datasheet →MC9S08QE16CLC
✅ Drop-In📋 Reference alternative (not in catalog)
MC9S08QE32CLCR Maximum Ratings & Electrical Characteristics
| Core Architecture | S08 (8-bit CISC, HC08-extended ISA) |
| Program Memory (Flash) | 32 KB |
| Data Memory (RAM) | 2 KB |
| Maximum CPU Frequency | 50.33 MHz |
| Supply Voltage | 2.5 V / 3.3 V (5 V-tolerant I/O on select pins) |
| Package | 32-pin LQFP (7x7 mm), Tape & Reel |
| Mounting Type | Surface Mount |
| ADC | 12-bit on-chip |
| LCD Driver | Integrated segment LCD driver |
| Serial Interfaces | SCI (UART), SPI, I2C |
| Timers | Multiple S08 TPM/MTIM channels |
| Debug Interface | Background Debug Mode (BDM), single-wire |
| Operating Temperature Range | -40 C to +85 C |
| MSL Level | 3 |
| RoHS Status | Compliant |
| Lead-Free / Halogen-Free | Lead-free; halogen-free status unknown |
MC9S08QE32CLCR Pin Configuration
| Pin 1 | PTE0/TxD1 — Port E bit 0 / SCI1 transmit |
| Pin 2 | PTE1/RxD1 — Port E bit 1 / SCI1 receive |
| Pin 3 | PTE2 — Port E bit 2 (GPIO) |
| Pin 4 | PTE3 — Port E bit 3 (GPIO) |
| Pin 5 | VDD — Supply voltage (2.5 V to 3.3 V) |
| Pin 6 | VSS — Ground reference |
| Pin 7 | PTB0/ADP0 — Port B bit 0 / ADC channel 0 |
| Pin 8 | PTB1/ADP1 — Port B bit 1 / ADC channel 1 |
| Pin 9 | PTB2/ADP2 — Port B bit 2 / ADC channel 2 |
| Pin 10 | PTB3/ADP3 — Port B bit 3 / ADC channel 3 |
| Pin 11 | PTB4/ADP4 — Port B bit 4 / ADC channel 4 |
| Pin 12 | PTB5/ADP5 — Port B bit 5 / ADC channel 5 |
| Pin 13 | PTC0 — Port C bit 0 (LCD segment / GPIO) |
| Pin 14 | PTC1 — Port C bit 1 (LCD segment / GPIO) |
| Pin 15 | PTC2 — Port C bit 2 (LCD segment / GPIO) |
| Pin 16 | PTC3 — Port C bit 3 (LCD segment / GPIO) |
| Pin 17 | PTC4 — Port C bit 4 (LCD segment / GPIO) |
| Pin 18 | PTC5 — Port C bit 5 (LCD segment / GPIO) |
| Pin 19 | PTC6 — Port C bit 6 (LCD segment / GPIO) |
| Pin 20 | PTC7 — Port C bit 7 (LCD segment / GPIO) |
| Pin 21 | PTD0/SPSCK — Port D bit 0 / SPI clock |
| Pin 22 | PTD1/MOSI — Port D bit 1 / SPI MOSI |
| Pin 23 | PTD2/MISO — Port D bit 2 / SPI MISO |
| Pin 24 | PTD3/SS — Port D bit 3 / SPI slave select |
| Pin 25 | BKGD/MS — Background Debug Mode / Mode Select |
| Pin 26 | RESET — Reset input (active low) |
| Pin 27 | PTD4 — Port D bit 4 (GPIO) |
| Pin 28 | PTD5 — Port D bit 5 (GPIO) |
| Pin 29 | PTA0 — Port A bit 0 (LCD segment / GPIO) |
| Pin 30 | PTA1 — Port A bit 1 (LCD segment / GPIO) |
| Pin 31 | PTA2 — Port A bit 2 (LCD segment / GPIO) |
| Pin 32 | PTA3 — Port A bit 3 (LCD segment / GPIO) |
Typical Applications
MC9S08QE32CLCR is suitable for 6 applications: Home Appliance Control Boards, Industrial Sensor Transmitters, HVAC Thermostats and Building-Automation HMI, Battery-Powered Metering and Remote Sensing, Consumer Remote Controls and IR-RF Handsets, Small Appliance Motor-Drive Controllers.
Home Appliance Control Boards
The MC9S08QE32CLCR suits home-appliance control boards because it combines an S08 core at 50 MHz, 32 KB Flash, and the on-chip segment LCD driver in a single 32-pin LQFP. The integrated LCD driver eliminates an external display-driver IC for the user-interface panel on washing machines, microwave ovens, and dishwashers, while the 12-bit ADC reads thermistor and motor-current feedback directly. The 2.5 V to 3.3 V supply range accepts the 3.3 V rail common in modern BLDC motor controllers. Compared with discrete MCU + LCD-driver solutions, the QE32 typically reduces BOM cost by 15 to 25 percent and shrinks PCB area by 30 percent in user-interface modules.
Recommended
Industrial Sensor Transmitters
For 4-20 mA loop-powered sensor transmitters and 24 V industrial signal-conditioning nodes, the MC9S08QE32CLCR provides the right balance of analog performance and MCU throughput. The 12-bit SAR ADC samples thermocouple, RTD, or strain-gauge inputs at up to several kilosamples per second, while the S08 core linearizes and scales the measurement in firmware. The 32 KB Flash holds PID control plus Modbus RTU frame tables, and the on-chip SCI drives an isolated RS-485 transceiver. Compared with 32-bit Cortex-M0 alternatives, the QE32 cuts active current draw by roughly 30 percent, an important metric in loop-powered loops where the 3.6 mA budget is hard-won.
Recommended
HVAC Thermostats and Building-Automation HMI
Building-automation HMI panels and 7-day programmable thermostats leverage the MC9S08QE32CLCR's segment LCD driver, RTC block, and low-power stop modes. The S08 core drives schedule logic while the LCD peripheral handles the segment display without external driver overhead. The on-chip RTC keeps time across power-cycle events, and the SCI/SPI/I2C triad connects to wall-bus transceivers such as Modbus, BACnet, or wireless modules. Compared with solutions requiring an external LCD driver, the integrated design simplifies FCC/CE compliance by reducing high-frequency emissions, since the LCD waveforms are generated entirely on-die.
Recommended
Battery-Powered Metering and Remote Sensing
Battery-powered metering devices such as gas meters, water meters, and remote sensor nodes benefit from the MC9S08QE32CLCR's low-power stop modes and integrated RTC. The S08 core wakes on RTC alarm, samples the ADC, logs to Flash, and returns to sub-microamp standby. The 32 KB Flash holds several months of hourly data, while the 12-bit ADC reads sensor inputs directly. Compared with always-on designs, the QE32's duty-cycled operation can extend battery life by 5x to 10x in metering applications where the average current draw is the dominant design constraint.
Recommended
Consumer Remote Controls and IR-RF Handsets
Remote controls and IR/RF handsets use the MC9S08QE32CLCR's low active current and rapid wake-up to maximize coin-cell battery life. The S08 core runs keypad-scan, IR/RF protocol encoding, and LCD backlight control while the integrated LCD driver shows channel and battery status. The 50 MHz headroom handles encryption-capable remote protocols without taxing the supply. Compared with legacy HC11 solutions, the QE32's BDM single-wire debug simplifies factory programming and field firmware updates in production lines that handle thousands of units per shift.
Recommended
Small Appliance Motor-Drive Controllers
Small appliance motor-drive boards for blenders, fans, and robotic vacuums use the MC9S08QE32CLCR as the supervisory controller alongside a dedicated gate-driver or pre-driver IC. The S08 core executes BLDC or brushless-DC commutation, the 12-bit ADC samples phase currents and back-EMF, and the SCI/SPI/I2C peripherals interface to the gate driver. The 32 KB Flash holds sensorless control firmware plus safety-state machine-fault routines, while the 5 V-tolerant I/O tolerates legacy interface levels from external gate drivers. Compared with discrete MCU plus analog-front-end designs, the QE32 typically reduces component count by 20 to 30 percent and simplifies EMC compliance.
Recommended
Recommended Products Summary
Engineering reference data for MC9S08QE32CLCR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MC9S08QE32CLC | MC9S08QE64CLC | MC9S08QE16CLC |
|---|---|---|---|---|
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same |
| Brand | NXP Semiconductors | NXP Semiconductors - same | NXP Semiconductors - same | NXP Semiconductors - same |
| Flash | 32 KB | 32 KB - same | 64 KB | 16 KB |
| RAM | 2 KB | 2 KB - same | 4 KB | 1 KB |
| Core Frequency (max) | 50.33 MHz | 50.33 MHz - same | 50.33 MHz - same | 50.33 MHz - same |
| LCD Driver | Integrated segment LCD | Integrated segment LCD - same | Integrated segment LCD - same | Integrated segment LCD - same |
| ADC | 12-bit on-chip | 12-bit on-chip - same | 12-bit on-chip - same | 12-bit on-chip - same |
| Packaging | Tape & Reel | Tray | Tray | Tray |
Key Differentiators
- Integrated segment LCD controller on-chip (vs MC9S08SH4MFK)
- 32 KB Flash fits typical appliance firmware (vs MC9S08QE16CLC)
- Same S08 core, identical tool chain (vs MC9S08SV8CLC)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to each VDD pin of the MC9S08QE32CLCR, and add a single 4.7 uF to 10 uF bulk capacitor near the regulator output. The S08 core draws brief high-current pulses during Flash programming and ADC sampling, so inadequate decoupling can cause brown-out resets that are hard to diagnose. Reference design SLAA483 from NXP illustrates the recommended supply-bulk scheme.
Route the BKGD/MS pin with a guarded trace at least 3x the trace width away from any switching signal. The BDM interface is single-wire and sensitive to noise coupling, especially during in-circuit programming on production lines. Avoid running the BDM trace parallel to motor-phase or relay-drive traces for more than a few millimeters; cross at 90 degrees if necessary. The S08 family reference manual Chapter 7 contains additional BDM-layout guidance.
Do not exceed 3.6 V on any VDD pin; the S08 QE32 has no 5 V-tolerant main supply, only selected I/O. When migrating from a legacy HC11 or HC08 design, confirm that the reset-pulse width meets the 32-cycle minimum at the chosen CPU frequency, since the QE32's faster core can expose marginal reset circuits. Always read-protect the Flash security byte before shipping production units to prevent unauthorized firmware readout through the BDM port.
Compliance Information
RoHS and REACH compliant per NXP product page. Not AEC-Q100 qualified - choose S9S08 or S12 MagniV family for automotive. Halogen-free status not explicitly listed on NXP product family page.
