MC68HC908QT4CPE-FR - 8-bit HC08 MCU, 4KB Flash, 8-PDIP | NXP
N.º de pieza: MC68HC908QT4CPE-FR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
MC68HC908QT4CPE-FR Descripción general
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.
Alternativas directas para MC68HC908QT4CPE-FR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC68HC908QT4CPE-FR (mismo factor de forma y huella) — difiere en Package, Mounting Type, ADC, Timers, Maximum Clock Frequency.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
MC908QT4ACPE
✅ Sustitución directa✓ En stock
$1.05 / unidad
Ver hoja de datos →MC68HC908QT4CPE
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
MC68HC908QT2CPE
✅ Sustitución directa ⚠️ Especificaciones sin verificar📋 Alternativa de referencia (no en el catálogo)
MC68HC908QT1CPE
✅ Sustitución directa ⚠️ Especificaciones sin verificar✓ En stock
$2.85 / unidad
Ver hoja de datos →MC68HC908QT4CPE-FR Valores máximos y características eléctricas
| Core Processor | HC08 (CPU08) |
| Core Size | 8-Bit |
| Architecture | CISC, Von Neumann |
| Frecuencia de reloj máxima | 8 MHz |
| Program Memory Size | 4KB (4K x 8) |
| Program Memory Type | FLASH |
| Series | HC08 (HC08Q Family) |
| Encapsulado | 8-PDIP |
| Tipo de montaje | Through Hole |
| Peripherals | ADC, LVD, POR, PWM |
| On-Chip ADC | Yes (ADC) |
Configuración de pines de MC68HC908QT4CPE-FR
| 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) |
Aplicaciones típicas
MC68HC908QT4CPE-FR es adecuado para 6 aplicacións: 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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
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.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC68HC908QT4CPE-FR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | 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 |
Diferenciadores clave
- Maximum flash in the 8-pin HC08QT family (frente a MC68HC908QT2CPE)
- 'A' grade silicon refresh available pin-to-pin (frente a MC908QT4ACPE)
- Cost floor option with same footprint (frente a MC68HC908QT1CPE)
Notas de diseño
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.
Información de cumplimiento
Compliance data was not present in the retrieved web data. Verify RoHS/REACH status on the NXP product page for MC68HC908QT4CPE before specification.
