MC68HC908QT4CPE-FR - 8-bit HC08 MCU, 4KB Flash, 8-PDIP | NXP
Teilenummer: MC68HC908QT4CPE-FR ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
MC68HC908QT4CPE-FR Übersicht
An 8-bit microcontroller (MCU) is a single-chip computer integrating a processor core, program memory, data memory, and peripherals on one die. The M68HC08 family uses a Complex Instruction Set Computer (CISC) with a Von Neumann architecture, and all family members share the enhanced CPU08 central processing unit. The HC08Q subfamily targets cost-sensitive, small-footprint embedded control where an entire application fits in an 8-pin package.
Key features include 4KB of in-application-programmable flash memory, the CPU08 core running at up to 8 MHz, an on-chip analog-to-digital converter (ADC), and a low-pin-count 8-PDIP footprint that supports through-hole assembly for prototypes and harsh-environment products.
Technically, the MC68HC908QT4 implements monitor-mode execution, allowing code to be downloaded into RAM by a host computer while most MCU pins retain their I/O functions - a significant advantage for field programming and development without dedicated sockets. Flash memory enables reprogramming for firmware updates, replacing earlier one-time-programmable OTP parts in the same footprint.
Typical applications include small appliance control, automotive accessories, battery chargers, simple motor control, and industrial sensors where a compact, low-cost controller with ADC inputs is required.
A key design consideration: verify flash endurance and erase/program voltage requirements per the manufacturer datasheet, and reserve one ADC channel for supply monitoring in battery-powered designs.
This page synthesizes distributor availability data, family drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für MC68HC908QT4CPE-FR – 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 MC68HC908QT4CPE-FR (gleiche Bauform und Footprint) – abweichend in Package, Mounting Type, ADC, Timers, Maximum Clock Frequency.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
MC908QT4ACPE
✅ Drop-In✓ Auf Lager
$1.05 / Stück
Datenblatt ansehen →MC68HC908QT4CPE
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
MC68HC908QT2CPE
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
MC68HC908QT1CPE
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$2.85 / Stück
Datenblatt ansehen →MC68HC908QT4CPE-FR Grenzwerte & elektrische Eigenschaften
| Core Processor | HC08 (CPU08) |
| Core Size | 8-Bit |
| Architecture | CISC, Von Neumann |
| Maximale Taktfrequenz | 8 MHz |
| Program Memory Size | 4KB (4K x 8) |
| Program Memory Type | FLASH |
| Series | HC08 (HC08Q Family) |
| Gehäuse | 8-PDIP |
| Montageart | Through Hole |
| Peripherals | ADC, LVD, POR, PWM |
| On-Chip ADC | Yes (ADC) |
MC68HC908QT4CPE-FR Pin-Konfiguration
| Pin 1 | VDD — Power supply |
| Pin 2 | PTA0/ADC0 — General-purpose I/O / ADC channel 0 |
| Pin 3 | PTA1/ADC1 — General-purpose I/O / ADC channel 1 |
| Pin 4 | PTA2/ADC2 — General-purpose I/O / ADC channel 2 |
| Pin 5 | PTA3/ADC3 — General-purpose I/O / ADC channel 3 |
| Pin 6 | VSS — Ground |
| Pin 7 | PTA4 — General-purpose I/O / oscillator/monitor functions (verify against datasheet) |
| Pin 8 | PTA5/IRQ — General-purpose I/O / external interrupt (verify against datasheet) |
Typische Anwendungen
MC68HC908QT4CPE-FR ist geeignet für 6 Anwendungs: Small Appliance Control, Battery Charger Management, Industrial Sensor Nodes, Simple Motor Control, Automotive Accessories, Prototyping and Education.
Small Appliance Control
The MC68HC908QT4CPE-FR fits small appliance control such as coffee makers, fans, and blenders, where the 4KB flash holds state machines, button debouncing, and PWM generation within one 8-pin device. The on-chip ADC reads temperature sensors or potentiometer setpoints with no external converter, and the CPU08 core at 8 MHz executes control loops comfortably. The 8-PDIP through-hole package survives wave soldering and field rework common in appliance manufacturing. Its monitor mode also enables production-line firmware download without a socketed programming fixture, reducing assembly cost and simplifying last-minute feature updates.
Empfohlen
Battery Charger Management
In battery charger designs, the MC68HC908QT4CPE-FR uses its integrated ADC to monitor battery voltage and current via divider networks, executing charge-profile state machines (CC/CV, trickle, termination) in the 4KB flash. PWM peripherals drive the pass element or buck switch with software control. The LVD and POR modules ensure safe recovery after supply brown-outs during charge cycles. The 8-PDIP through-hole package supports low-cost single-sided boards typical of consumer chargers. Flash reprogrammability lets the same PCB carry different charge profiles (NiMH vs Li-ion) by reflashing, consolidating inventory across charger variants and reducing BOM complexity.
Empfohlen
Industrial Sensor Nodes
For simple industrial sensing points - limit switches, analog transducers, threshold alarms - the MC68HC908QT4CPE-FR digitizes sensor signals via its on-chip ADC and communicates over software-timed serial links on PTA I/O pins. The 8 MHz CPU08 core handles filtering and thresholding; 4KB flash stores calibration tables and communication routines. The 8-PDIP package mounts in DIN-rail carrier boards and legacy through-hole sensor housings. Monitor mode permits field recalibration by downloading new code to RAM from a service laptop, so calibration constants and alarm thresholds can be updated without desoldering the MCU from installed hardware.
Empfohlen
Simple Motor Control
The MC68HC908QT4CPE-FR drives small DC and brushed motors using its PWM capability for speed control, with the ADC reading back EMF or current-sense signals for closed-loop regulation within the 4KB flash. The 8 MHz CPU08 supports kHz-range PWM with duty-cycle updates each cycle. The 8-PDIP through-hole footprint suits driver boards for fans, pumps, and small actuators where low component count and hand-serviceability matter. Firmware-based commutation and protection (stall detection via current threshold, thermal foldback via ADC supply sensing) consolidate functions that would otherwise require an ASIC, keeping the control board to a single IC plus power stage.
Empfohlen
Automotive Accessories
HC08-family devices historically served automotive accessory modules such as seat-adjust switches, mirror controls, and lighting modules. The MC68HC908QT4CPE-FR provides the flash memory for these control functions plus ADC channels for potentiometer position feedback and supply monitoring through LVD protection. Its 8-pin through-hole package tolerates the vibration and rework profile of automotive tier-2 modules. Note: confirm the specific temperature grade and automotive qualification status of this ordering code against the NXP datasheet before use in in-cabin or under-hood environments, as grade variants exist within the HC908QT numbering scheme.
Empfohlen
Prototyping and Education
The MC68HC908QT4CPE-FR is well suited to prototyping and teaching 8-bit embedded systems. The 8-PDIP package plugs directly into breadboards and DIP sockets, and monitor mode allows code to be downloaded into RAM by a host computer over a simple serial connection - no dedicated programmer hardware required for first experiments. The 4KB flash accommodates complete introductory projects (LED control, ADC reading, serial I/O) with headroom. The CPU08 instruction set, documented in the M68HC08 family literature, provides a clear CISC teaching path, and family scalability from QT1 to QT4 lets students migrate designs as code grows without changing hardware.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC68HC908QT4CPE-FR – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MC908QT4ACPE | MC68HC908QT4CPE | MC68HC908QT2CPE | MC68HC908QT1CPE |
|---|---|---|---|---|---|
| Package | 8-PDIP | 8-PDIP - same | 8-PDIP - same | 8-PDIP - same | 8-PDIP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Core | HC08 (CPU08), 8-Bit | HC08 (CPU08), 8-Bit | HC08 (CPU08), 8-Bit | HC08 (CPU08), 8-Bit | HC08 (CPU08), 8-Bit |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz |
| Flash Memory | 4KB (4K x 8) | 4KB (4K x 8) | 4KB (4K x 8) | 2KB | 1.5KB |
| ADC | Yes | Yes | Yes | Yes | Yes |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole | Through Hole |
| Grade / Variant Note | Standard, -FR packaging suffix | 'A' grade variant | Standard, no -FR suffix | Standard, reduced flash | Standard, minimum flash |
Wichtigste Unterscheidungsmerkmale
- Maximum flash in the 8-pin HC08QT family (vs. MC68HC908QT2CPE)
- 'A' grade silicon refresh available pin-to-pin (vs. MC908QT4ACPE)
- Cost floor option with same footprint (vs. MC68HC908QT1CPE)
Designhinweise
Verify the -FR suffix meaning against NXP ordering information before purchase - packaging suffixes on legacy HC08 parts denote taping/tray/packaging variants, not die or temperature changes. Always confirm the temperature grade embedded in the ordering code (CPE = commercial/extended per NXP conventions) matches your operating environment. When substituting the MC908QT4ACPE 'A' grade, review the revision-history section of the datasheet for errata differences between base and 'A' silicon before firmware reuse.
Decouple VDD with a 0.1 uF ceramic capacitor placed within a few millimeters of pin 1 and VSS on pin 6. Because the 8-PDIP package multiplexes ADC inputs with general-purpose I/O on PTA0-PTA3, keep analog traces to those pins short and away from PWM switching nodes to preserve ADC accuracy. On through-hole boards, allocate a local ground node near VSS rather than relying on a long daisy-chained ground return, especially when driving inductive motor loads from the same board.
Estimated: supply-current budget for this device is not specified in the retrieved data - consult the MC68HC908QY4/QT4 datasheet (MC68HC908QY4/D Rev. 6) for run and wait-mode current figures before sizing the regulator. Use the LVD (low-voltage detection) module and ensure the supply rail stays above the LVD threshold during power-down to prevent flash corruption; for battery applications, add series resistance plus zener or a small LDO to clamp VDD within the datasheet absolute maximum ratings.
Compliance-Informationen
Compliance data was not present in the retrieved web data. Verify RoHS/REACH status on the NXP product page for MC68HC908QT4CPE before specification.
