MC68HC908QT1CPE - 8-Bit HC08 MCU, 1.5KB Flash, 8MHz | NXP
Teilenummer: MC68HC908QT1CPE ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $4.5 | $4,50 |
| 10 | $4.05 | $40,50 |
| 100 | $3.62 | $362,00 |
| 500 | $3.21 | $1.605,00 |
| 1.000 | $2.85 | $2.850,00 |
MC68HC908QT1CPE Übersicht
A microcontroller (MCU) is a single-chip computer that combines a CPU core, program and data memory, peripherals, and I/O on one die. Within the broader taxonomy, the HC08QT1 is an 8-bit CISC MCU -> member of the HC08 family -> Freescale/NXP M68K lineage -> embedded microcontroller -> semiconductor IC. The HC08QT1 occupies the low-cost, low-pin-count node of the HC08Q tree, providing FLASH in-system programmability without an integrated analog-to-digital converter.
Key features include a 16 MHz maximum internal bus frequency (8 MHz typical application operation), a 4.5 V to 5.5 V single-supply operating range, on-chip FLASH with security, a 16-bit timer, an analog comparator, and a low-power STOP/WAIT mode. The Von Neumann architecture simplifies tool chains because program and data share a single address space, and the CISC instruction set reduces code size for bit-heavy control routines.
The architecture is built around the enhanced CPU08 core running from an internal bus, with FLASH used for both program storage and in-application reprogramming via the on-chip monitor ROM. The 8-pin PDIP package exposes six general-purpose I/O lines, the OSC1/OSC2 clock pins, and VDD/VSS, enabling two-layer board layouts and breadboard-friendly prototypes without requiring fine-pitch surface-mount assembly.
Typical applications include low-cost consumer appliances, white-goods control boards, simple motor drivers, lighting controllers, and legacy industrial timers. The device is also used in educational platforms that still target the HC08 instruction set for assembly teaching labs.
A key design consideration is supply-rail decoupling: place a 100 nF ceramic capacitor as close as possible to the VDD pin, since the internal bus draws peak current during FLASH erase cycles. For EMI-sensitive designs, route the oscillator traces with a guard ring and keep them short to minimize radiated noise.
This page synthesizes distributor pricing, drop-in FLASH-programmable drop-in alternatives from the same HC08Q family, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für MC68HC908QT1CPE – 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 MC68HC908QT1CPE (gleiche Bauform und Footprint) – abweichend in Program Memory Size, Package, Mounting Type, Core Processor, Program Memory Type.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MC68HC908QT2CPE
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC68HC908QT4CPE-FR
✅ Drop-In✓ Auf Lager
Preis auf Anfrage
Datenblatt ansehen →MC908QT1ACPE
✅ Drop-In✓ Auf Lager
$2.3 / Stück
Datenblatt ansehen →MC908QT2ACPE
✅ Drop-In✓ Auf Lager
$0.75 / Stück
Datenblatt ansehen →MC68HC908QY2CPE
✅ Drop-In✓ Auf Lager
$2.69 / Stück
Datenblatt ansehen →MC68HC908QT1VPE
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC68HC908QT1CPE Grenzwerte & elektrische Eigenschaften
| Product Type | 8-Bit Microcontroller (MCU) |
| Core | Freescale/NXP HC08 (CPU08) |
| Family | M68HC08 Family, HC08Q sub-family |
| Program Memory Type | FLASH |
| Program Memory Size | 1.5 KB (1.5K x 8) |
| EEPROM Size | None (no on-chip EEPROM) |
| ADC | None (no-ADC variant of HC08Q) |
| Maximum Bus Frequency | 16 MHz internal bus |
| Typical Application Frequency | 8 MHz |
| Supply Voltage (VDD) | 4.5 V to 5.5 V |
| Supply Voltage (5V Variant) | 5 V nominal |
| I/O Pins | 6 GPIO (PTA0-PTA5) |
| Timers | 16-bit, 2-channel |
| Analog Comparator | 1 internal comparator |
| Communication | SCI (UART) via software bit-bang or shared pins |
| Betriebstemperatur | -40C to +85C (Industrial) |
| Gehäuse | 8-pin PDIP (PE, 0.300 inch / 7.62 mm pitch) |
| Montageart | Through-Hole (THT) |
| MSL-Level | 1 (unlimited floor life at 30C/85% RH) |
MC68HC908QT1CPE Pin-Konfiguration
| Pin 1 | PTA0/ADC0/TCLK — General-purpose I/O, analog channel 0, timer clock input (no-ADC variant: GPIO/TCLK) |
| Pin 2 | PTA1 — General-purpose I/O port A bit 1 |
| Pin 3 | VDD — Positive supply voltage (4.5 V to 5.5 V) |
| Pin 4 | VSS — Ground reference |
| Pin 5 | PTA2/IRQ/TCLK — GPIO, external interrupt request, timer clock |
| Pin 6 | PTA3/OSC2 — GPIO or oscillator output (crystal mode) |
| Pin 7 | PTA4/RESET — GPIO or active-low reset input |
| Pin 8 | PTA5/BKGD/MS — GPIO, background debug mode, mode select |
Typische Anwendungen
MC68HC908QT1CPE ist geeignet für 6 Anwendungs: Low-Cost Consumer Appliance Control, Lighting Control Modules, Simple Motor and Fan Drivers, Industrial Timers and Counters, Educational and Hobby Electronics, Legacy Replacement and Service Stock.
Low-Cost Consumer Appliance Control
The MC68HC908QT1CPE fits low-cost consumer appliance boards because its 1.5 KB FLASH and HC08 CISC core deliver enough headroom for simple state-machine control while staying within the 8-pin PDIP form factor. With 6 GPIO lines and a 16-bit timer, it can sense a single switch or comparator input and drive a relay or TRIAC directly through a current-limiting resistor. Its 4.5-5.5 V single supply matches the rectified mains rail that already powers the appliance, eliminating an extra regulator stage. The Von Neumann architecture lets a small C compiler emit compact code that fits in 1.5 KB, enabling functions like fan-speed cycling, washing-machine timing, or coffee-maker brew control without external EEPROM. The exposed PDIP package also simplifies hand-soldering during prototyping and field repairs. The NXP NRND status means designers should still prefer the MC908QT1ACPE or S9S08QD4 for new designs, but the QT1CPE remains abundant in installed equipment.
Empfohlen
Lighting Control Modules
In LED driver and dimmer boards the MC68HC908QT1CPE acts as a PWM controller that commands brightness levels and detects push-button inputs. Its 16-bit timer with two channels can generate the high-resolution PWM needed for dimming without flicker, while the internal analog comparator handles zero-cross detection for phase-cut dimmer topologies. The HC08 CISC instruction set includes fast bit-manipulation instructions that simplify decoding rotary-encoder or capacitive-touch inputs within the 1.5 KB FLASH budget. The 4.5-5.5 V supply aligns with 5 V regulator rails already present in the lighting fixture, and the 8-pin PDIP is small enough to fit behind a wall switch. The device's low STOP-mode current also benefits battery-backed emergency lighting and motion-sensor fixtures. Replacement with S9S08QD4 is recommended for new designs requiring AEC-Q100 or 1.8 V operation.
Empfohlen
Simple Motor and Fan Drivers
The MC68HC908QT1CPE is widely used as a small BLDC or brushed-motor controller where 6 GPIO lines and a 16-bit timer suffice. The 16 MHz internal bus allows precise commutation timing up to 60,000 RPM in 2-pole motors, while the on-chip analog comparator implements back-EMF sensing for sensorless brushless DC control. With 1.5 KB of FLASH the firmware can store multiple speed profiles and soft-start ramps. The 5 V supply matches the logic-level gate drivers that the QT1 must trigger, and the through-hole PDIP enables hand-soldering of a heatsink-attached driver board. The Von Neumann architecture keeps the C compiler simple and lets a single binary image be used across motor variants by tweaking a parameter table. For new high-volume designs, NXP recommends the S9S08PT16 family, but the QT1CPE remains a proven workhorse for legacy hobby and HVAC applications.
Empfohlen
Industrial Timers and Counters
The MC68HC908QT1CPE powers industrial timing modules, interval counters, and process-watchdog boards because its 16-bit timer and reliable 8 MHz operation suit pulse-measurement tasks. The 5 V single-supply tolerance matches 24V-to-5V converter rails common in industrial cabinets, and the industrial -40C to +85C operating range supports deployment in non-climate-controlled panels. The HC08 CISC bit-set/clear instructions make port-toggle handling simple, which is critical when one of the six GPIO pins must drive a fault relay. In-system FLASH programmability via the BDM interface allows field firmware updates without removing the module from the DIN rail enclosure. The 8-pin PDIP also accommodates standard industrial connector pinouts. For ATEX or IECEx-certified equipment, NXP offers the MC68HC908QT1VPE automotive-grade variant in the same package.
Empfohlen
Educational and Hobby Electronics
The MC68HC908QT1CPE is a popular MCU in microcontroller teaching labs because its 8-pin PDIP fits standard breadboards and its HC08 instruction set is small enough to cover in a single semester. With 1.5 KB of FLASH, students can complete labs ranging from blinking LEDs to UART bit-bang communication within the on-chip memory. The single-wire background debug mode (BKGD/MS) on pin 8 supports inexpensive MON08 programmers and CodeWarrior IDE downloads. The 5 V supply matches USB-to-serial adapters and Arduino-era 5 V shields, so students can wire the QT1CPE directly to common lab peripherals without level shifters. The Von Neumann architecture also makes the memory map easy to teach. Instructors preferring a modern alternative can transition courses to the S9S08QD4 in the same 8-pin footprint, but the QT1CPE still ships in countless legacy training kits.
Empfohlen
Legacy Replacement and Service Stock
The MC68HC908QT1CPE remains in active service-stock rotation because thousands of installed industrial controllers, consumer appliances, and HVAC boards reference this exact part. Service organizations buy the QT1CPE to repair 10-15-year-old equipment where redesign is not economical. The 8-pin PDIP format is hand-solderable by field technicians, and the in-system FLASH programmability lets a service depot load customer-specific firmware on demand. The 1.5 KB FLASH is sufficient because legacy firmware is rarely updated once a product line stabilizes. Distributors like DigiKey and Mouser stock remaining inventory even though NXP has flagged the part NRND. For higher-volume replacement buys, the cross-compatible MC908QT1ACPE or MC908QT2ACPE share the same datasheet family and pinout, allowing one BOM entry to cover multiple legacy designs.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC68HC908QT1CPE – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MC68HC908QT2CPE | MC68HC908QT4CPE-FR | MC908QT1ACPE | MC908QT2ACPE | MC68HC908QY2CPE |
|---|---|---|---|---|---|---|
| Package | 8-PDIP (PE) | 8-PDIP (PE) - same | 8-PDIP (PE) - same | 8-PDIP (PE) - same | 8-PDIP (PE) - same | 8-PDIP (PE) - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| FLASH Memory | 1.5 KB | 2 KB | 4 KB | 1.5 KB | 2 KB | 1.5 KB |
| Core | HC08 (CPU08) | HC08 (CPU08) | HC08 (CPU08) | HC08 (CPU08) | HC08 (CPU08) | HC08 (CPU08) |
| Maximum Bus Frequency | 16 MHz internal bus | 16 MHz | 16 MHz | 16 MHz | 16 MHz | 16 MHz |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| GPIO Pins | 6 | 6 | 6 | 6 | 6 | 6 |
| Lifecycle Status | NRND (End-of-Life approaching) | NRND | NRND | Active (recommended for new designs) | Active | NRND |
Wichtigste Unterscheidungsmerkmale
- Lowest pin-count HC08Q with no ADC, lowest cost (vs. MC68HC908QY2CPE)
- Refreshed die in same package as long-term NXP recommendation (vs. MC908QT1ACPE)
- Smaller FLASH for tighter cost-sensitive BOMs (vs. MC68HC908QT4CPE-FR)
Designhinweise
Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 3) to suppress switching transients during FLASH erase cycles. The internal charge pump draws peak current spikes up to 30 mA while programming, and a poorly decoupled supply can cause programming failures or corrupted FLASH. For high-noise environments, add a bulk 10 uF electrolytic capacitor on the same rail as close to the MCU as layout allows.
Route the OSC1/OSC2 traces (pins 5/6 in crystal mode) as short as possible and symmetric, with a ground guard ring to minimize radiated EMI. Keep the BKGD/MS line (pin 8) away from the oscillator traces to prevent debug glitches. The 8-pin PDIP footprint allows generous trace widths - use at least 0.3 mm (12 mil) traces for power lines to handle the 30 mA erase peaks without excessive voltage drop.
Do not apply voltages outside 4.5-5.5 V to VDD - the QT1 is not a 3.3 V part despite its HC08 family lineage; using the QY2/QY4 3 V variant instead for low-voltage designs. The RESET pin (pin 7) is bidirectional - external reset sources must be open-drain to avoid contention with the internal pull-up. Finally, when programming in BDM mode, ensure the target board is powered before connecting the programmer to avoid latching-up the ESD structures on the BKGD/MS pin.
Compliance-Informationen
RoHS and lead-free status not explicitly documented in the verified web data; the 'CPE' suffix denotes PDIP commercial/industrial temperature grade, not necessarily lead-free. The -VPE suffix denotes automotive qualification; -Q1 would denote AEC-Q100. The base MC68HC908QT1CPE is not AEC-Q100 qualified.
