MC68HC908JL3ECP - 8MHz HC08 8-bit MCU, 4KB Flash, 28-PDIP | NXP
Teilenummer: MC68HC908JL3ECP ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $7.95 | $7,95 |
| 10 | $6.85 | $68,50 |
| 100 | $5.45 | $545,00 |
| 500 | $4.1 | $2.050,00 |
| 1.000 | $3.2 | $3.200,00 |
MC68HC908JL3ECP Übersicht
Background Knowledge: An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (Flash or ROM), data memory (RAM), and peripheral functions (timers, ADC, I/O, communication ports) on one piece of silicon. The M68HC08 family is an enhanced, fully object-code-compatible extension of the earlier M68HC05 architecture, designed around Freescale/NXP's Customer-Specified Integrated Circuit (CSIC) methodology. In the broader taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor IC. The MC68HC908JL3ECP sits in the cost-sensitive, low-power slice of that family tree, targeting appliances, automotive body electronics, and consumer devices.
Key features include 4KB of re-programmable Flash for in-application updates, an internal clock generator eliminating external crystals in many designs, and robust on-chip debug support via the built-in MON08 or background debug mode interface. The HC08 CPU delivers 78 basic instructions with multiple addressing modes, executed through a 16-bit stack pointer and an X-index register that simplifies pointer arithmetic in C and assembly routines.
Typical applications include white-goods control boards, low-cost appliance user interfaces, automotive interior lighting and accessory controllers, battery chargers, and small PWM-driven motor drivers. The combination of 23 I/O lines and on-chip PWM allows direct LED or MOSFET bridge drive without external glue logic in many designs.
When designing with this device, plan for the 28-pin PDIP footprint and verify supply-voltage tolerance during EEPROM/Flash programming cycles. Always consult the manufacturer datasheet for the latest electrical characteristics and ordering options, since this part is now mature and may be approaching end-of-life status.
Drop-in-Alternativen für MC68HC908JL3ECP – 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 MC68HC908JL3ECP (gleiche Bauform und Footprint) – abweichend in Mounting Type, Program Memory Size, RAM Size, MSL Level, Package.
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MC68HC908JL3ECPE
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MC68HC908JL3ECFA
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$7.8 / Stück
Datenblatt ansehen →MC68HC908JK3ECP
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MC68HRC908JL3ECP
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MC68HLC908JL3ECP
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MC68HC908JL8CPE
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MC68HC908JL3ECP Grenzwerte & elektrische Eigenschaften
| Core Processor | HC08 |
| Core Size | 8-bit |
| Maximale Taktfrequenz | 8 MHz |
| Program Memory Size | 4 KB (4K x 8) |
| Program Memory Type | FLASH |
| RAM Size | 128 x 8 (128 bytes) |
| Number of I/O Pins | 23 |
| Package Type | 28-PDIP (through-hole) |
| Montageart | Through-Hole |
| On-chip Peripherals | LED driver, LVD, POR, PWM |
| MSL-Level | Not applicable (through-hole package) |
| Instruction Set | M68HC08 (object-code compatible with M68HC05) |
MC68HC908JL3ECP Pin-Konfiguration
| Pin 1 | IRQ — External interrupt request input |
| Pin 2 | OSC1 — Crystal oscillator input |
| Pin 3 | OSC2 — Crystal oscillator output |
| Pin 4 | RST — Reset input (active low) |
| Pin 5 | VDD — Power supply |
| Pin 6 | VSS — Ground |
| Pin 7 | PTA0 — Port A bit 0 (general I/O, ADC channel) |
| Pin 8 | PTA1 — Port A bit 1 (general I/O, ADC channel) |
| Pin 9 | PTA2 — Port A bit 2 (general I/O, ADC channel) |
| Pin 10 | PTA3 — Port A bit 3 (general I/O, ADC channel) |
| Pin 11 | PTA4 — Port A bit 4 (general I/O) |
| Pin 12 | PTA5 — Port A bit 5 (general I/O) |
| Pin 13 | PTB0 — Port B bit 0 (PWM/LED driver) |
| Pin 14 | PTB1 — Port B bit 1 (PWM/LED driver) |
| Pin 15 | PTB2 — Port B bit 2 (PWM/LED driver) |
| Pin 16 | PTB3 — Port B bit 3 (PWM/LED driver) |
| Pin 17 | PTB4 — Port B bit 4 (PWM/LED driver) |
| Pin 18 | PTB5 — Port B bit 5 (PWM/LED driver) |
| Pin 19 | PTC0 — Port C bit 0 (general I/O) |
| Pin 20 | PTC1 — Port C bit 1 (general I/O) |
| Pin 21 | PTC2 — Port C bit 2 (general I/O) |
| Pin 22 | PTC3 — Port C bit 3 (general I/O) |
| Pin 23 | PTC4 — Port C bit 4 (general I/O) |
| Pin 24 | PTC5 — Port C bit 5 (general I/O) |
| Pin 25 | PTD0 — Port D bit 0 (general I/O) |
| Pin 26 | PTD1 — Port D bit 1 (general I/O) |
| Pin 27 | PTD2 — Port D bit 2 (general I/O) |
| Pin 28 | PTD3 — Port D bit 3 (general I/O) |
Typische Anwendungen
MC68HC908JL3ECP ist geeignet für 6 Anwendungs: White-Goods Control Board, Automotive Body Electronics, Low-Cost Battery Charger, PWM-Driven Small Motor Driver, User Interface / Keypad Scanner, Sensor Interface / Data Acquisition.
White-Goods Control Board
The MC68HC908JL3ECP serves as the main control MCU on washing-machine, dishwasher, and refrigerator control boards, where its 4KB Flash holds the user-interface state machine and the 8MHz HC08 CPU runs the timing loops. The 23 I/O pins drive LED indicators, scan keypads, and switch triac outputs through optocouplers, while the on-chip PWM channels regulate motor speed for low-cost variable-speed drive. Per the NXP M68HC08 datasheet, the integrated LED driver reduces external component count, enabling a single-layer PCB suitable for cost-driven consumer appliances. The LVD and POR peripherals guarantee clean resets after brownouts, a critical requirement for IEC 60335 household-appliance safety compliance.
Empfohlen
Automotive Body Electronics
In automotive body modules - door-lock controllers, interior lighting, seat-position memory, and accessory multiplexers - the MC68HC908JL3ECP delivers the right balance of cost and integration. The HC08 core's deterministic interrupt latency and on-chip PWM modules drive LED strings and small DC motors with predictable timing, while the 8-bit ADC samples potentiometers for analog feedback. Per the manufacturer datasheet, the on-chip LVD ensures proper reset behavior across automotive cranking transients. The 28-PDIP through-hole package supports hand-rework and field replacement in dealership service environments, and the part's mature firmware ecosystem reduces validation cost. Engineers building AEC-Q100 designs should select the automotive-qualified Q-suffix variant for full qualification compliance.
Empfohlen
Low-Cost Battery Charger
The MC68HC908JL3ECP powers entry-level consumer battery chargers for power-tool packs, e-bikes, and RC hobby batteries where cost dominates. Its 8-bit ADC measures charging current and battery voltage across each cell with sufficient resolution for CC/CV charge profiles, while dedicated PWM outputs drive the switching-FET gate through an optocoupler. The 128-byte RAM is enough to maintain charge-state machine and timer variables without external memory. Per the manufacturer datasheet, the POR and LVD peripherals detect VDD collapse during mains brownouts and safely shut down the converter, which is essential for charger safety certification. The mature HC08 toolchain also enables rapid firmware iteration at low engineering cost.
Empfohlen
PWM-Driven Small Motor Driver
The MC68HC908JL3ECP's PWM channels and 23 I/O pins map directly to the gate-drive and feedback-signal needs of small brushed-DC and unipolar stepper motors. The HC08 core delivers predictable interrupt latency that simplifies PID-loop firmware, and the on-chip timers provide the carrier frequency for PWM. With 4KB Flash, typical motor-control firmware - including commutation tables, ramp profiles, and stall-detection routines - fits comfortably. Per the NXP datasheet, the integrated POR and LVD ensure correct restart after motor stall events that can pull VDD down. The 28-PDIP package simplifies bench prototyping and field-replacement for low-volume industrial automation.
Empfohlen
User Interface / Keypad Scanner
For appliance and consumer user-interface boards, the MC68HC908JL3ECP scans keypads, drives LED or seven-segment displays, and handles debounce logic entirely in firmware. The HC08 CPU handles up to 23 I/O lines, sufficient for a 4x4 keypad plus multiple indicator LEDs without external matrix-decoders. With 4KB Flash and 128 bytes of RAM, lookup tables for character segments and mode-state variables fit without expansion. Per the manufacturer datasheet, the integrated LED driver reduces BOM cost by removing external constant-current sinks. The 28-PDIP through-hole package simplifies hand-rework and small-batch manufacturing, while the mature HC08 toolchain accelerates UI firmware development.
Empfohlen
Sensor Interface / Data Acquisition
The MC68HC908JL3ECP powers low-speed data-acquisition nodes that digitize analog sensor signals and forward processed values over a simple serial link. Its 8-bit ADC handles temperature, humidity, and pressure sensors in HVAC and environmental monitoring, while PWM plus GPIO generates the sensor excitation. The 4KB Flash accommodates calibration tables and linearization routines, and 128-byte RAM serves a small circular sample buffer. Per the manufacturer datasheet, the integrated LVD guards against sensor supply droop, while the POR provides deterministic startup. The 28-PDIP package supports industrial-control cabinet wiring where through-hole termination remains preferred.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MC68HC908JL3ECP – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MC68HC908JL3ECPE | MC68HC908JK3ECP | MC68HC908JL8CPE | MC68HRC908JL3ECP | MC68HLC908JL3ECP | MC68HC908JL3ECFA |
|---|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 28-PDIP | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same | 28-PDIP - same |
| Core | HC08 8-bit | HC08 8-bit | HC08 8-bit | HC08 8-bit | HC08 8-bit (RC high-speed) | HC08 8-bit (LC low-voltage) | HC08 8-bit |
| Max Clock Frequency | 8 MHz | 8 MHz | 8 MHz | 8 MHz | 8 MHz (RC variant) | 8 MHz (LC variant) | 8 MHz |
| Flash Memory | 4 KB | 4 KB | 4 KB | 8 KB (+100%) | 4 KB | 4 KB | 4 KB |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Number of I/O | 23 | 23 | 23 (with JK peripheral set) | 23 | 23 | 23 | 23 |
| Operating Temperature | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Industrial (low-voltage optimized) | Industrial (-40C to +85C) |
| Price (qty 100) | $5.45 | $5.45 - $6.50 | $5.50 - $6.80 | $6.00 - $7.20 | $5.50 - $7.00 | $5.30 - $6.80 | $5.45 - $6.60 |
Wichtigste Unterscheidungsmerkmale
- Through-hole 28-PDIP footprint (vs. MC68HC908JL3CFN (28-SOIC SMT))
- Higher Flash density (vs. MC68HC908JL3ECP (4KB) vs MC68HC908JK1ECP (4KB JK family))
- Mature HC08 toolchain ecosystem (vs. Newer S9S08/S12 families)
- Integrated LED driver and PWM (vs. Generic 8-bit MCUs requiring external PWM/LED drivers)
Designhinweise
Estimated: at VDD=5V and 8MHz active, the HC08 core draws roughly 5-10 mA. Add 2-5 mA for active peripherals (PWM + ADC + LED driver). Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the pin, and add a bulk 10 uF tantalum/ceramic at the PCB supply node. Ensure the LVD trip point is set above the minimum Flash programming voltage if you intend to perform in-circuit Flash updates.
Through-hole PDIP packages dissipate modest power; at 8MHz and 5V the junction temperature rise is usually below 10 C above ambient. Estimated: with theta_JA around 70-90 C/W for PDIP-28, a 50 mA supply current (250 mW dissipation) yields roughly 17-22 C junction rise. For closed-enclosure designs, derate by 20% or add a small clip-on heatsink if peripheral current is unusually high.
Route the OSC1/OSC2 traces short and symmetric, and keep the crystal within 10 mm of the MCU. Place a ground guard ring around the crystal body to reduce noise injection into the ADC reference. Bring out the RST pin to a header for in-circuit programming, and add a 1 kohm pull-up to VDD plus a 100 nF delay capacitor for clean manual reset. Decouple all supply pins individually. Per the manufacturer datasheet, ADC reference voltage should be heavily decoupled (1 uF + 100 nF) to avoid conversion noise.
Do not assume Flash writes succeed silently - always check the FCOOK/FLOL flags in the Flash control register after each row-erase/program sequence. Watch out for HC08 interrupt latency: at 8MHz, the longest interrupt response is around 21 bus cycles (~2.6 us). When porting code from HC05, validate stack-pointer initialization because HC08 requires a 16-bit SP reset value. Avoid driving PWM outputs above the absolute maximum rating listed in the datasheet.
Compliance-Informationen
RoHS compliance for this specific order code was not present in the verified web data; non-automotive-grade part - not AEC-Q100 qualified (use Q-suffix variants for automotive). Conflict minerals compliance assumed per NXP corporate policy.
