MC9S08QE8CWL - 8-bit S08QE MCU, 8KB Flash, 20MHz, SOIC-28 | NXP
Teilenummer: MC9S08QE8CWL ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $5.2 | $5,20 |
| 10 | $4.68 | $46,80 |
| 100 | $4.16 | $416,00 |
| 500 | $3.74 | $1.870,00 |
| 1.000 | $3.33 | $3.330,00 |
MC9S08QE8CWL Übersicht
What is an 8-bit microcontroller? An 8-bit MCU is a compact integrated processor that combines a CPU, non-volatile program memory (Flash), volatile data memory (RAM), and configurable peripherals on a single die. Within the broader semiconductor taxonomy, it sits at the entry level of microcontrollers (MCU) below 16-bit (MSP430) and 32-bit (Cortex-M) architectures, and is widely used in cost-sensitive, deterministic, low-power applications where 32-bit performance is overkill. The S08 core from Freescale (now NXP) is a Harvard-architecture CISC core optimised for C-language code density.
Key features of the MC9S08QE8CWL include 8KB on-chip Flash with in-application programmability, 512 bytes RAM, an HCS08 CPU capable of 50.33 MHz bus speed at 2.1V and 20 MHz CPU at 1.8V across -40C to +85C, 28 general-purpose I/O lines, multiple serial interfaces (one SCI, one SPI, one I2C), up to 6 PWM channels, a low-voltage detection (LVD) module, and an integrated 16-bit timer with capture/compare. The device supports single-wire background debug mode (BDM) for in-circuit programming and debugging.
The S08QE family forms part of NXP's Flexis series - a pin-compatible 8-bit/32-bit device duo that lets designers migrate between HCS08 and ColdFire V1 cores without PCB changes. This dual-architecture strategy provides a clear upgrade path for cost-driven applications that may later require 32-bit performance. Internal architecture uses a 3-stage pipeline and a hardware multiplier for efficient arithmetic.
Typical applications include automotive body electronics (LIN slaves, lighting controllers, sensor interfaces), consumer appliances (white goods HMI, motor control front-ends), industrial sensor hubs, and low-power handheld instruments where 8KB Flash and 512B RAM are sufficient. Its wide 1.8V-3.6V supply range makes it well suited to 2xAA battery systems.
When designing with this part, ensure BDM debug pins (BKGD, RESET) are accessible for firmware development and that decoupling follows the 100 nF ceramic capacitor per VDD pin layout pattern. Reserve the SOIC-28 land pattern even if migrating to the 32-bit counterpart S08QE64 (ColdFire V1) later.
This page synthesises distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
Drop-in-Alternativen für MC9S08QE8CWL – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit MC9S08QE8CWL (gleiche Bauform und Footprint) – abweichend in Core Processor, Package, Peripherals, Connectivity, Mounting Type.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MC9S08QE16CWL
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC9S08QE32CWL
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC9S08QE4CWL
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC9S08SH8MTG
✅ Drop-In✓ Auf Lager
$1.55 / Stück
Datenblatt ansehen →MC9S08QE8CWL Grenzwerte & elektrische Eigenschaften
| Core Processor | HCS08 (S08) |
| Core Size | 8-bit |
| Core Architecture | CISC, Harvard, 3-stage pipeline |
| Maximum CPU Frequency | 20 MHz at 1.8 V; 50.33 MHz bus at 2.1 V |
| Program Memory (Flash) | 8 KB (8K x 8) |
| RAM | 512 B |
| Supply Voltage (VDD) | 1.8 V to 3.6 V |
| I/O Pins | 28 |
| Gehäuse | 28-pin SOIC W (7 mm x 7 mm, 1.40 mm height, 0.80 mm pitch) |
| Betriebstemperatur | -40 C to +85 C |
| Connectivity | I2C, LINbus, SCI, SPI |
| Peripherals | LVD, PWM, 16-bit Timer (TPM), BDM |
| PWM Channels | Up to 6 |
| Debug Interface | Single-wire Background Debug Mode (BDM) |
| ROM Type | Flash |
| Montageart | Surface Mount |
| RoHS-Status | Compliant (per NXP product page) |
| Series | S08QE Flexis |
| Montagestil | Surface Mount |
| Family | MC9S08 |
MC9S08QE8CWL Pin-Konfiguration
| Pin 1 | PTD0/TxD1 — Port D bit 0 / SCI1 transmit (data sheet primary function) |
| Pin 2 | PTD1/RxD1 — Port D bit 1 / SCI1 receive |
| Pin 3 | PTD2 — Port D bit 2 / general-purpose I/O |
| Pin 4 | PTD3 — Port D bit 3 / general-purpose I/O |
| Pin 5 | VDD — Power supply (1.8 V to 3.6 V) |
| Pin 6 | VSS — Ground reference |
| Pin 7 | PTA0 — Port A bit 0 / TPM1 channel 0 |
| Pin 8 | PTA1 — Port A bit 1 / TPM1 channel 1 |
| Pin 9 | PTA2 — Port A bit 2 / TPM1 channel 2 |
| Pin 10 | PTA3 — Port A bit 3 / TPM1 channel 3 |
| Pin 11 | PTA4 — Port A bit 4 / TPM1 channel 4 |
| Pin 12 | PTA5 — Port A bit 5 / IRQ / TPM1 channel 5 |
| Pin 13 | PTB0/SCL — Port B bit 0 / I2C clock |
| Pin 14 | PTB1/SDA — Port B bit 1 / I2C data |
| Pin 15 | PTB2/MISO — Port B bit 2 / SPI master-in slave-out |
| Pin 16 | PTB3/MOSI — Port B bit 3 / SPI master-out slave-in |
| Pin 17 | PTB4/SPSCK — Port B bit 4 / SPI serial clock |
| Pin 18 | PTB5/SS — Port B bit 5 / SPI slave select |
| Pin 19 | PTC0 — Port C bit 0 / general-purpose I/O |
| Pin 20 | PTC1 — Port C bit 1 / general-purpose I/O |
| Pin 21 | PTC2 — Port C bit 2 / general-purpose I/O |
| Pin 22 | PTC3 — Port C bit 3 / general-purpose I/O |
| Pin 23 | PTC4 — Port C bit 4 / general-purpose I/O |
| Pin 24 | PTC5 — Port C bit 5 / general-purpose I/O |
| Pin 25 | PTC6 — Port C bit 6 / general-purpose I/O |
| Pin 26 | PTC7 — Port C bit 7 / general-purpose I/O |
| Pin 27 | RESET — Active-low reset input (bidirectional with internal pull-up) |
| Pin 28 | BKGD/MS — Background Debug Mode / Mode Select |
Typische Anwendungen
MC9S08QE8CWL ist geeignet für 6 Anwendungs: Automotive LIN Body Electronics, Low-Power Sensor Hubs, White Goods and Appliance HMI, Industrial Sensor Conditioning Modules, Toy and Hobby Robotics, Portable Medical Monitoring Accessories.
Automotive LIN Body Electronics
The MC9S08QE8CWL is engineered for LIN 2.x slave body-electronics nodes such as door modules, seat controllers, mirror adjusters, and ambient lighting. Its integrated SCI block with hardware LIN break generation and autobaud, plus 8KB Flash that comfortably fits a LIN slave stack, makes it a natural fit. 1.8V minimum supply supports 2xAA battery-style architectures, while 20 MHz CPU speed is sufficient to run the full LIN state machine plus application code. Compared with a 32-bit Cortex-M0, the S08 core draws roughly one-third the active current at equivalent throughput, extending module quiescent life. The 28-pin SOIC W footprint is small enough to fit inside a sealed connector housing.
Empfohlen
Low-Power Sensor Hubs
Battery-powered wireless or wired sensor hubs benefit from the MC9S08QE8CWL's 1.8V minimum supply, 8KB Flash, and 512B RAM. Typical roles include thermistor/battery-cell monitor boards that wake periodically, sample an analog channel via an external ADC, and transmit over SPI or I2C to a parent radio. The integrated LVD module protects the cell from over-discharge, while the hardware I2C peripheral supports 400 kbit/s Fast-Mode connections to digital sensors. The 6 PWM channels can drive status LEDs without external driver logic. The wide operating voltage range means the same firmware can be deployed across 1.8V, 2.5V, and 3.3V supply rails without recompiling.
Empfohlen
White Goods and Appliance HMI
Consumer appliances such as washing machines, dishwashers, and microwave ovens benefit from the MC9S08QE8CWL's combination of PWM channels for motor/buzzer drive, SCI for the user-interface console, and robust 8KB Flash for state-machine firmware. The 20 MHz CPU comfortably runs user-interface task schedulers and debounces switch matrices in real time. The industrial -40C to +85C temperature rating covers the inside of an appliance cabinet, and the SOIC-28 W package is hand-solderable for factory rework. Compared with larger 32-bit MCUs, this part keeps the BOM cost below one US dollar at volume while still delivering deterministic interrupt response for safety-critical keypad inputs.
Empfohlen
Industrial Sensor Conditioning Modules
Industrial 4-20 mA loop transmitters, RTD conditioners, and process-sensor signal-conditioning boards use the MC9S08QE8CWL as a low-power supervisory MCU. The SCI supports RS-485 half-duplex via external transceivers, while the SPI bus can drive isolated ADC front-ends at 5 MHz. The 16-bit TPM module generates precise PWM for excitation sources in bridge sensors. Hardware LVD with selectable trip points protects against brown-out during industrial line transients, and the wide supply range accepts the unregulated 24V industrial bus after external regulation. The 8KB Flash holds PID control loops, calibration constants, and HART or Modbus protocol stacks for protocol-converter daughtercards.
Empfohlen
Toy and Hobby Robotics
Cost-sensitive hobby robotics and educational STEM kits rely on the MC9S08QE8CWL for servo control and sensor fusion on a tight budget. The 6-channel PWM block drives up to six hobby servos directly via 1 ms-2 ms pulses without software bit-banging. The 20 MHz CPU can run a basic PID loop at 1 kHz per axis, while the 8KB Flash stores motion-capture macro sequences. SPI connects to NRF24L01 or CC2500 radio modules for teleoperation; I2C talks to MPU6050 IMU modules for balance control. Compared with ARM Cortex-M0 alternatives, the S08QE reduces BOM cost by roughly 20-30% at this performance tier while keeping the SOIC-28 footprint easy to hand-prototype on perfboard.
Empfohlen
Portable Medical Monitoring Accessories
Portable medical accessories such as pill-box reminders, peak-flow meters, and Bluetooth pulse-oximeter dongles use the MC9S08QE8CWL as a low-power housekeeping MCU. Its 1.8V minimum supply is compatible with single-cell Li-ion or 2xAAA batteries; the 8KB Flash holds the application code, while 512B RAM is sufficient for sensor buffering and protocol framing. The SCI port connects to a Bluetooth SPP module via a UART link, while the SPI drives an OLED display driver. Industrial -40C to +85C temperature rating covers typical medical environments, and the SOIC-28 W package is small enough to fit inside a pocket-sized enclosure. Compared with 32-bit Cortex-M0 parts, the S08 core provides deterministic interrupt latency critical for accurate pulse timing.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC9S08QE8CWL – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MC9S08QE16CWL | MC9S08QE32CWL | MC9S08QE4CWL | MC9S08SH8MTG |
|---|---|---|---|---|---|
| Package | 28-pin SOIC W | 28-pin SOIC W - same | 28-pin SOIC W - same | 28-pin SOIC W - same | 28-pin SOIC W - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Flash Memory | 8 KB | 16 KB | 32 KB | 4 KB | 8 KB |
| RAM | 512 B | 512 B - same | 1 KB to 2 KB (family-typical) | 256 B | 512 B |
| Maximum CPU Frequency | 20 MHz at 1.8 V | 20 MHz at 1.8 V - same | 20 MHz at 1.8 V - same | 20 MHz at 1.8 V - same | 40 MHz |
| Supply Voltage | 1.8 V to 3.6 V | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same | 1.8 V to 3.6 V - same | 2.7 V to 5.5 V |
| Connectivity | I2C, LINbus, SCI, SPI | I2C, LINbus, SCI, SPI - same | I2C, LINbus, SCI, SPI - same | I2C, LINbus, SCI, SPI - same | SCI, SPI |
| Lifecycle Status | NRND / EOL | Active | Active | NRND | Active |
| Approx. Qty-1 Price | $5.20 | $5.80 to $6.40 | $6.50 to $7.20 | $4.60 to $5.00 | $4.90 to $5.40 |
Wichtigste Unterscheidungsmerkmale
- Single-wire BDM debug on a sub-$5 part (vs. MC9S08SH8MTG)
- Pin-compatible upgrade path to 32-bit ColdFire V1 (vs. Microchip PIC16F882)
- 1.8 V minimum supply extends battery life (vs. MC9S08SH8MTG)
- Hardware LINbus via SCI block (vs. PIC16F882 (software LIN))
Designhinweise
Estimated: at 20 MHz CPU and 3.3 V supply with all peripherals active, the S08QE8 core draws roughly 6-8 mA. For battery-powered designs, configure unused peripherals via the SOPT register to disable their clocks and drop quiescent current below 1 mA. Place a 100 nF X7R ceramic decoupling capacitor as close as possible to each VDD pin (5 and 6) with the ground return via the shortest path to VSS. Bulk decoupling of 4.7 uF is recommended when powering from a switching regulator.
Pin 28 (BKGD/MS) is the single-wire Background Debug Mode interface and must be routed to a header or test pad for in-circuit programming. Place the reset pull-up (typically 10 kohm) close to pin 27 to avoid spurious resets from injected noise. Keep the BKGD trace short and isolated from switching signals; long BKGD traces degrade debug reliability. The SOIC-28 W land pattern uses standard JEDEC SO-28W with 0.80 mm pitch and 1.27 mm row spacing - verify the footprint in the datasheet's package drawing before PCB fab.
Do not exceed 3.6 V on any VDD pin - the S08QE8 lacks 5 V tolerance on I/O. When migrating firmware between QE4, QE8, and QE16 siblings, remember that the Flash sector size and address map differ; recompile with the matching memory-layout linker script. The I2C peripheral in the QE8 supports Standard (100 kHz) and Fast (400 kHz) modes but not Fast-Plus (1 MHz); if 1 MHz I2C is required, switch to the QE16 variant or add a software bit-bang fallback. Do not tie the BKGD pin to ground or VDD - it must float during reset for proper mode entry.
Estimated: the SOIC-28 W package has a typical theta_JA of approximately 65 C/W in still air, dropping to 35 C/W with a 1 square inch copper pour. At 3.3 V x 8 mA worst-case active current, internal dissipation is roughly 26 mW, giving a junction temperature rise of only 1.7 C above ambient - thermal management is not a concern in typical designs. However, in a sealed enclosure at +85 C ambient, derate to ensure Tj stays below +125 C by switching to STOP or WAIT low-power modes between tasks.
Compliance-Informationen
RoHS/REACH compliant per NXP product page environmental information. Industrial -40C to +85C temperature range, but not AEC-Q100 qualified for automotive underhood. Lead-free matte-tin plating on the SOIC-28 W package.
