MC908JL3ECPE - HC08 8-Bit MCU, 4KB Flash, 8MHz, 28-DIP | NXP
Référence : MC908JL3ECPE ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $5.85 | $5,85 |
| 10 | $5.3 | $53,00 |
| 100 | $4.75 | $475,00 |
| 500 | $4.25 | $2 125,00 |
| 1 000 | $3.8 | $3 800,00 |
MC908JL3ECPE Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripherals such as timers, communications interfaces, and analog-to-digital converters. The MC908JL3ECPE belongs to the 8-bit MCU category, sitting within the broader taxonomy of microcontrollers -> microprocessors -> semiconductors -> integrated circuits. The HC08 architecture is an object-code-compatible evolution of the earlier M68HC05 family, offering an enhanced instruction set while preserving legacy code portability for cost-driven designs.
Key features include an integrated 8-channel 10-bit analog-to-digital converter (ADC), an enhanced serial communications interface (ESCI), a 16-bit timer with capture/compare/PWM, and an internal clock generator with software-selectable trim. The device operates over a 3V to 5.5V supply range and supports industrial -40C to +85C temperature grades, with low-power STOP and WAIT modes reducing quiescent current for battery-connected designs.
Architecturally, the MC908JL3ECPE leverages a von Neumann bus with a 16-bit stack pointer and 8-bit ALU, complemented by on-chip voltage regulator and brown-out reset. FLASH memory supports in-application reprogramming, and the background debug module (BDM) enables non-intrusive in-circuit debugging and flash programming using a single-wire interface.
Typical applications include appliance control boards, low-end HVAC thermostats, simple sensor interfaces, lighting controllers, and battery-powered consumer devices. The integrated ADC and PWM channels make it well suited for closed-loop motor control, LED dimming, and analog signal conditioning in industrial white goods.
Designers should plan for external decoupling (0.1uF ceramic at VDD) and provide adequate PCB clearance around the 28-pin PDIP through-hole footprint for wave-solder compatibility. For new designs, verify long-term availability and consider pin-compatible HC08 family variants or modern Kinetis E-series replacements from NXP for active-production programs.
This page consolidates distributor pricing, drop-in 28-pin PDIP alternatives, and practical design notes that complement the manufacturer datasheet for engineers evaluating the MC908JL3ECPE.
Alternatives de remplacement direct pour MC908JL3ECPE — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec MC908JL3ECPE (même facteur de forme et même empreinte) — différant par Package, Mounting Type, MSL Level, Core, Core Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
MC908JL8CPE
✅ Remplacement direct✓ En stock
$4.85 / unité
Voir la fiche technique →MC68HC908JL3ECP
✅ Remplacement direct✓ En stock
$3.2 / unité
Voir la fiche technique →MC68HC908JK3ECP
✅ Remplacement direct ⚠️ Spécifications non vérifiées📋 Alternative de référence (hors catalogue)
PIC16F73-I/SP
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC908JL3ECPE Valeurs maximales et caractéristiques électriques
| Core | HC08 (M68HC08 Family) |
| Largeur du bus de données | 8 bit |
| Fréquence d'horloge maximale | 8 MHz |
| Program Memory Size | 4 KB FLASH |
| RAM Size | 128 bytes |
| ADC | 8-channel, 10-bit |
| Supply Voltage Range | 3 V to 5.5 V |
| Plage de température de fonctionnement | -40C to +85C |
| Boîtier | 28-pin PDIP (Through-Hole) |
| Type de montage | Through-Hole |
| Number of I/O Pins | 23 |
| Timers | 1 x 16-bit (TPM, 2 channels) |
| Communication Interface | Enhanced SCI (ESCI) |
| On-Chip Debug | Background Debug Module (BDM) |
| Statut RoHS | See manufacturer documentation |
| Niveau MSL | Not applicable (through-hole) |
Configuration des broches de MC908JL3ECPE
| Broche 1 | PTB0/AD0 — Port B bit 0 / ADC channel 0 |
| Broche 2 | PTB1/AD1 — Port B bit 1 / ADC channel 1 |
| Broche 3 | PTB2/AD2 — Port B bit 2 / ADC channel 2 |
| Broche 4 | PTB3/AD3 — Port B bit 3 / ADC channel 3 |
| Broche 5 | VDD — Positive supply voltage (3.0V to 5.5V) |
| Broche 6 | VSS — Ground reference |
| Broche 7 | PTA0/TXD — Port A bit 0 / ESCI transmit |
| Broche 8 | PTA1/RXD — Port A bit 1 / ESCI receive |
| Broche 9 | PTA2/TCLK — Port A bit 2 / TPM clock input |
| Broche 10 | PTA3 — Port A bit 3 |
| Broche 11 | PTA4 — Port A bit 4 |
| Broche 12 | PTA5/IRQ — Port A bit 5 / external interrupt request |
| Broche 13 | PTA6 — Port A bit 6 |
| Broche 14 | PTA7/RST — Port A bit 7 / reset (shared) |
| Broche 15 | PTB4/AD4 — Port B bit 4 / ADC channel 4 |
| Broche 16 | PTB5/AD5 — Port B bit 5 / ADC channel 5 |
| Broche 17 | PTB6/AD6 — Port B bit 6 / ADC channel 6 |
| Broche 18 | PTB7/AD7 — Port B bit 7 / ADC channel 7 |
| Broche 19 | PTC0 — Port C bit 0 |
| Broche 20 | PTC1 — Port C bit 1 |
| Broche 21 | PTC2 — Port C bit 2 |
| Broche 22 | PTC3 — Port C bit 3 |
| Broche 23 | PTC4 — Port C bit 4 |
| Broche 24 | PTC5 — Port C bit 5 |
| Broche 25 | PTC6 — Port C bit 6 |
| Broche 26 | PTC7 — Port C bit 7 |
| Broche 27 | OSC1 — Crystal oscillator input |
| Broche 28 | OSC2 — Crystal oscillator output |
Applications typiques
MC908JL3ECPE convient pour 6 applications: White Goods and Appliance Control, HVAC Thermostat and Environmental Control, LED Lighting Controllers and Dimmers, Battery-Powered Consumer Devices, Sensor Interface and Signal Conditioning, Legacy Industrial Control Replacement.
White Goods and Appliance Control
The MC908JL3ECPE is well matched to washing-machine, dishwasher, and refrigerator control boards where cost dominates and the 4 KB flash accommodates state-machine firmware for motor sequencing, sensor monitoring, and user-interface handling. The integrated 8-channel 10-bit ADC reads thermistor inputs, water-level probes, and door switches without external analog circuitry. The 16-bit TPM timer generates PWM outputs for motor speed control and valve actuation, while the ESCI supports service-port diagnostics. Compared to a Cortex-M0 part, the HC08's deterministic interrupt latency and lower cost make it attractive for high-volume white goods.
Recommandé
HVAC Thermostat and Environmental Control
In low-end residential and commercial thermostats, the MC908JL3ECPE delivers 8 MHz processing to handle temperature sampling, hysteresis control, and relay switching with minimal external components. Its -40C to +85C operating range covers rooftop and outdoor equipment enclosures. The 10-bit ADC quantizes thermistor bridges to better than 0.5C resolution, sufficient for setpoint control. STOP and WAIT modes drop quiescent current for battery-backed thermostats that retain time-of-day across power loss. The 28-pin PDIP package simplifies wave-solder assembly on contractor-grade control boards.
Recommandé
LED Lighting Controllers and Dimmers
The 16-bit TPM timer with two PWM channels makes the MC908JL3ECPE capable of generating phase-correct PWM for LED dimming and color-mixing control. Its 8 MHz bus can sustain 16-bit PWM resolution at low duty cycles, reducing visible flicker in architectural and decorative lighting. The integrated ADC reads ambient light sensors for daylight harvesting loops. Power dissipation is minimal at the part's quiescent current, helping drivers meet ENERGY STAR standby requirements. Designers can drop in the 8 KB flash MC908JL8CPE if the dimming curve tables require more code space.
Recommandé
Battery-Powered Consumer Devices
For portable consumer electronics such as remote controls, electronic toys, and personal-care appliances, the MC908JL3ECPE's STOP and WAIT low-power modes preserve battery life when the user is idle. The 3.0V to 5.5V supply range accepts two alkaline cells directly without a boost regulator. The 10-bit ADC monitors battery voltage for low-battery indication. The 28-pin PDIP through-hole package is well suited to low-cost wave-solder manufacturing. For higher-volume portable programs, consider migrating to the Kinetis KE02 family for ARM-class power management.
Recommandé
Sensor Interface and Signal Conditioning
Industrial sensor-interface boards benefit from the MC908JL3ECPE's 8-channel 10-bit ADC paired with the HC08 core's deterministic interrupt response, allowing real-time polling of multiple analog signals without DMA. The ESCI transmits digitized sensor readings to a host PLC or display. The 128-byte RAM accommodates ring buffers for sampled data without overflow. The through-hole PDIP package survives field-serviceable industrial environments better than fine-pitch QFN alternatives. Cross-brand replacement such as the PIC16F73-I/SP offers the same 28-PDIP footprint with similar ADC count.
Recommandé
Legacy Industrial Control Replacement
The MC908JL3ECPE serves as a direct replacement for older M68HC05-based control boards where the original part is no longer available but the existing firmware targets the HC08 architecture. Its 4 KB flash holds typical state-machine and PID loop firmware for motor starters, valve actuators, and conveyor controllers. The BDM interface allows field engineers to reflash the part without removing it from the PCB, simplifying maintenance. For NRND-lifecycle risk mitigation, designers can migrate to MC908JL8CPE on the same PCB footprint and reuse all firmware with only a memory-map adjustment.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour MC908JL3ECPE — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | MC908JL8CPE | MC68HC908JL3ECP | MC68HC908JK3ECP | PIC16F73-I/SP |
|---|---|---|---|---|---|
| Package | 28-PDIP | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Microchip Technology |
| Core Architecture | HC08 (8-bit) | HC08 (8-bit) - same | HC08 (8-bit) - same | HC08 (8-bit) - same | PIC16 (RISC 8-bit) |
| Program Memory | 4 KB FLASH | 8 KB FLASH (+100%) | 4 KB FLASH - same | 4 KB FLASH - same | 7 KB FLASH (+75%) |
| RAM | 128 bytes | 192 bytes (+50%) | 128 bytes - same | 128 bytes - same | 192 bytes (+50%) |
| Max Clock Frequency | 8 MHz | 8 MHz - same | 8 MHz - same | 8 MHz - same | 20 MHz |
| ADC | 8-ch, 10-bit | 8-ch, 10-bit - same | 8-ch, 10-bit - same | 12-ch, 10-bit | 5-ch, 8-bit |
| Lifecycle Status | NRND | NRND | NRND | NRND | Active (production) |
Principaux différenciateurs
- Doubled flash capacity with same 28-PDIP footprint (vs MC908JL8CPE)
- Identical silicon under NXP branding (vs MC68HC908JL3ECP)
- Cross-brand 28-PDIP drop-in for firmware portability (vs PIC16F73-I/SP)
Notes de conception
Decouple VDD (pin 5) and VSS (pin 6) with a 0.1uF ceramic capacitor placed as close as possible to the supply pins, with a 10uF tantalum or aluminum bulk capacitor on the same rail. The HC08 internal voltage regulator generates a 2.5V core from VDD, so a clean 3.0V to 5.5V supply is essential. Brown-out reset (BOR) should be enabled in CONFIG to hold the part in reset during VDD dips below the programmed threshold, preventing flash corruption during power-up sequencing.
Layout the 28-pin PDIP footprint with standard 0.100 inch (2.54 mm) row spacing and 0.600 inch (15.24 mm) between rows. Provide a continuous ground plane under the IC to reduce EMI susceptibility, and route the oscillator traces (OSC1/OSC2) with short, direct paths to the crystal or resonator. Place the crystal within 0.5 inch of the IC to minimize parasitic capacitance, and guard the analog ADC inputs (PTB0-PTB7) with a ground trace to reduce digital switching noise coupling.
Do not leave unused I/O pins floating - configure them as outputs or enable the internal pull-up via software to prevent shoot-through current. The PTA7/RST pin is a shared reset/general-purpose I/O and requires careful configuration in the CONFIG register; failing to do so can prevent normal operation. Avoid driving the ADC inputs beyond VDD + 0.3V to prevent latch-up. When migrating firmware from the HC05 to the HC08, verify stack pointer and direct-page register mapping differences to avoid subtle bugs.
Informations de conformité
Compliance data not explicitly present in the verified web snippets; values set to 'unknown' pending manufacturer datasheet check. AEC-Q100 is not applicable to this commercial-grade MCU.
