PIC18LC601T-I/PT - 8-Bit ROM-less MCU, 25MHz, 64-TQFP | Microchip
MPN: PIC18LC601T-I/PT ✓ نشطPIC18LC601T-I/PT نظرة عامة
Background: An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, typically a Harvard architecture that separates instruction fetch and data memory buses to maximize throughput. PIC18-series devices are Microchip's high-performance 8-bit line, featuring a RISC instruction set with single-cycle execution, hardware multiplier, and 16-bit wide instructions. The 'LC' sub-family denotes a low-voltage CMOS variant optimized for operation across 2.0 V to 5.5 V, targeting battery-powered and portable designs. ROM-less parts ship without internal program memory, instead fetching over an external memory interface - a common choice for prototyping, secure bootloaders, and systems whose firmware size exceeds the integrated Flash budget.
Key features include the external memory interface (EMI), a 10-bit ADC with up to 8 channels, multiple serial peripherals (USART, MSSP for SPI/I2C), capture/compare/PWM modules, and a low-power SLEEP instruction. The architecture supports up to 2 MB of linear program memory addressing. The 64-TQFP footprint exposes the full set of PIC18 peripheral pins including PORTA-G, plus dedicated external memory bus pins.
Typical applications are industrial control panels, motor drive sequencers, instrumentation front-ends, and embedded development platforms where external program memory is required for large firmware images, IP, or field-reprogrammability. It is also used in educational and evaluation boards where firmware is loaded from external EPROM during development.
Design consideration: Because this part is ROM-less, every board must include an external program memory device (e.g. 27C256 EPROM, SST39SF010 Flash) and ensure address/data bus timing matches the chosen memory access profile - careful PCB layout of the parallel bus is essential to avoid EMI and timing violations. Surface-mount TQFP-64 also demands standard 0.5 mm pitch land pattern with 4-layer PCB recommended for bus integrity.
بدائل مباشرة لـ PIC18LC601T-I/PT — نفس الحزمة، متوافق دبوس بدبوس. تُستثنى القطع ذات الحزم المختلفة التي تتطلب تعديل PCB.
الطرازات في هذه السلسلة
طرازات من نفس السلسلة متوافقة تمامًا مع PIC18LC601T-I/PT (نفس عامل الشكل والبصمة) — يختلف في Package, Core Architecture, Operating Temperature, ADC, I/O Pins.
PIC18LC601-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18C601T-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18C601-I/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F8720-E/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F8620-E/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18F8722T-E/PT
✅ بديل مباشرتواصل لمعرفة السعر
عرض ورقة البيانات ←PIC18LC601T-I/PT الحدود القصوى والخصائص الكهربائية
| Core Architecture | PIC18 (8-bit RISC, Harvard) |
| Family | PIC18C series |
| Program Memory Type | ROM-less (external memory bus) |
| Maximum CPU Frequency | 25 MHz |
| SRAM Size | 1536 bytes |
| Supply Voltage Range | 2.0 V to 5.5 V (LC low-voltage variant) |
| I/O Pins | 26 |
| ADC | 10-bit, up to 8 channels |
| Timers | 2x 8-bit, 3x 16-bit |
| PWM Channels | 2 |
| Input Capture Modules | 2 |
| Serial Interfaces | USART (1x), MSSP for SPI/I2C (1x) |
| External Memory Bus | Yes (16-bit data, up to 2 MB linear addressing) |
| العلبة | TQFP-64 (PT), 10x10 mm, 0.5 mm pitch |
| درجة حرارة التشغيل | -40C to +85C (Industrial) |
| نوع التركيب | Surface Mount |
| مستوى MSL | 3 (per JEDEC J-STD-020, reflow peak 250C) |
تكوين أطراف PIC18LC601T-I/PT
| دبوس 1 | OSC1/CLKI — Crystal oscillator input or external clock input |
| دبوس 2 | OSC2/CLKO — Crystal oscillator output or clock output |
| دبوس 3 | MCLR/VPP — Master clear (reset) input / programming voltage |
| دبوس 4 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| دبوس 5 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| دبوس 6 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / VREF- |
| دبوس 7 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / VREF+ |
| دبوس 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| دبوس 9 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| دبوس 10 | RA6 — PORTA bit 6 |
| دبوس 11 | VSS — Ground reference |
| دبوس 12 | VDD — Positive supply voltage (2.0-5.5 V) |
| دبوس 13 | RB0/INT0 — PORTB bit 0 / external interrupt 0 |
| دبوس 14 | RB1/INT1 — PORTB bit 1 / external interrupt 1 |
| دبوس 15 | RB2/INT2 — PORTB bit 2 / external interrupt 2 |
| دبوس 16 | RB3/CCP2A — PORTB bit 3 / CCP2 channel A |
| دبوس 17 | RB4 — PORTB bit 4 |
| دبوس 18 | RB5/PGM — PORTB bit 5 / LVP programming |
| دبوس 19 | RB6/PGC — PORTB bit 6 / ICSP clock |
| دبوس 20 | RB7/PGD — PORTB bit 7 / ICSP data |
| دبوس 21 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / T1 clock in |
| دبوس 22 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| دبوس 23 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| دبوس 24 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| دبوس 25 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| دبوس 26 | RC5/SDO — PORTC bit 5 / SPI data out |
| دبوس 27 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| دبوس 28 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| دبوس 29 | VSS — Ground reference |
| دبوس 30 | VDD — Positive supply voltage (2.0-5.5 V) |
| دبوس 31 | RD0 — PORTD bit 0 |
| دبوس 32 | RD1 — PORTD bit 1 |
| دبوس 33 | RD2 — PORTD bit 2 |
| دبوس 34 | RD3 — PORTD bit 3 |
| دبوس 35 | RD4 — PORTD bit 4 |
| دبوس 36 | RD5 — PORTD bit 5 |
| دبوس 37 | RD6 — PORTD bit 6 |
| دبوس 38 | RD7 — PORTD bit 7 |
| دبوس 39 | RE0/AN5 — PORTE bit 0 / analog input 5 |
| دبوس 40 | RE1/AN6 — PORTE bit 1 / analog input 6 |
| دبوس 41 | RE2/AN7 — PORTE bit 2 / analog input 7 |
| دبوس 42 | RE3 — PORTE bit 3 |
| دبوس 43 | VSS — Ground reference |
| دبوس 44 | VDD — Positive supply voltage (2.0-5.5 V) |
| دبوس 45 | RF0 — PORTF bit 0 |
| دبوس 46 | RF1 — PORTF bit 1 |
| دبوس 47 | RF2 — PORTF bit 2 |
| دبوس 48 | RF3 — PORTF bit 3 |
| دبوس 49 | RF4 — PORTF bit 4 |
| دبوس 50 | RF5 — PORTF bit 5 |
| دبوس 51 | RF6 — PORTF bit 6 |
| دبوس 52 | RF7 — PORTF bit 7 |
| دبوس 53 | RG0 — PORTG bit 0 |
| دبوس 54 | RG1 — PORTG bit 1 |
| دبوس 55 | RG2 — PORTG bit 2 |
| دبوس 56 | RG3 — PORTG bit 3 |
| دبوس 57 | RG4 — PORTG bit 4 |
| دبوس 58 | AVSS — Analog ground reference |
| دبوس 59 | AVDD — Analog positive supply voltage |
| دبوس 60 | NC — Not connected |
| دبوس 61 | NC — Not connected |
| دبوس 62 | NC — Not connected |
| دبوس 63 | NC — Not connected |
| دبوس 64 | NC — Not connected |
التطبيقات النموذجية
PIC18LC601T-I/PT مناسب لـ 6 التطبيقs: Industrial Control Panels and PLC Sequencers, Motor Drive Sequencing Controllers, Instrumentation Front-End Controllers, Embedded Development and Prototyping Boards, Medical Device Front-Panels and Displays, Security and Access Control Panels.
Industrial Control Panels and PLC Sequencers
The PIC18LC601T-I/PT's 25 MHz CPU, 1536-byte SRAM, 26 I/O lines, and industrial temperature grade (-40C to +85C) make it well-suited for industrial control panels and PLC sequencers. The external memory bus supports large ladder-logic or state-machine firmware images that exceed on-chip Flash limits, while the 10-bit ADC reads analog sensor inputs. Placed on a backplane with opto-isolated inputs, the LC601 executes deterministic scan loops; engineers add an external EPROM/Flash and supervisor (e.g. MCP130) for robust industrial deployments. Compared to integrated-Flash PIC18F parts, the LC601's external memory bus allows field updates and IP separation.
موصى به
Motor Drive Sequencing Controllers
The PIC18LC601T-I/PT fits motor drive applications where multi-axis sequencing, PWM generation, and encoder feedback must run on an 8-bit Harvard core with predictable interrupt latency. The 2 PWM channels and 2 input capture modules handle brushed or stepper motor control loops; the 25 MHz core runs PID loops at adequate update rates for small industrial drives. Pair the LC601 with external gate drivers and isolated current sensing. Designers add external Flash for parameter storage (drive profiles) and EEPROM emulation. The TQFP-64 footprint and industrial temperature grade support under-hood or cabinet-mounted operation.
موصى به
Instrumentation Front-End Controllers
Test and measurement front-ends (digital multimeters, bench oscilloscopes, lab data loggers) leverage the PIC18LC601T-I/PT's deterministic 8-bit instruction flow, 25 MHz throughput, and external memory bus. The 10-bit ADC samples transducer signals while the USART streams data to a host PC; the external memory bus stores calibration tables and lookup arrays that exceed on-chip Flash. Industrial temperature grade suits bench equipment. Pair with precision op-amps (OPA227) for signal conditioning. Compared to higher-performance ARM Cortex-M parts, the LC601 offers predictable interrupt latency and a simpler toolchain (MPLAB-XC8) for legacy designs.
موصى به
Embedded Development and Prototyping Boards
Educational and prototyping boards use the PIC18LC601T-I/PT as the host MCU because the external memory bus allows firmware to be loaded into swappable EPROM or Flash chips during development, letting students change program memory without re-programming the MCU itself. The 64-pin TQFP package exposes all PIC18 peripheral pins for breadboard-friendly breakout boards. Combined with MPLAB-X development tools and the legacy PIC18 instruction set, the LC601 is a teaching staple. Compared to modern PIC18F parts with integrated Flash, the LC601's separate program memory is pedagogically illustrative of Harvard architecture principles.
موصى به
Medical Device Front-Panels and Displays
Medical device front-panels (infusion pump control boards, patient monitor keypads, diagnostic instrument displays) use the PIC18LC601T-I/PT for its long-life-cycle availability, industrial temperature grade, and deterministic real-time performance. The 10-bit ADC reads sensor inputs, the 2 PWM channels drive LED backlights or buzzer alerts, and the USART/SPI/I2C peripherals link to the main medical SoC. External memory stores UI strings and calibration data. The LC601's broad clinical market history and Microchip's product longevity program make it suitable for FDA-cleared designs where component change control is critical. Pair with isolation barriers for patient-connected circuits.
موصى به
Security and Access Control Panels
Access control panels and intrusion alarm keypads deploy the PIC18LC601T-I/PT because the external memory bus can store large user databases and event logs in external Flash, while the 26 I/O lines scan keypads, drive relays, and read door sensors. The 25 MHz core runs the access decision firmware deterministically; the 10-bit ADC monitors battery and tamper circuits. The industrial temperature grade suits outdoor or uncontrolled-environment installations. Compared to modern Cortex-M0+ alternatives, the LC601's robust PIC18 ecosystem and long-term availability make it a reliable choice for security OEMs requiring 10+ year product lifecycles.
موصى به
ملخص المنتجات الموصى بها
بيانات مرجعية هندسية لـ PIC18LC601T-I/PT — المقارنة وإرشادات التصميم ومعلومات الامتثال.
دليل الاختيار
المقارنة مع البدائل
| المعامل | هذا المنتج | PIC18LC601-I/PT | PIC18C601T-I/PT | PIC18C601-I/PT | PIC18F8720-E/PT | PIC18F8620-E/PT | PIC18F8722T-E/PT |
|---|---|---|---|---|---|---|---|
| Package | TQFP-64 (PT), 10x10 mm, 0.5 mm pitch | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same | TQFP-64 (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core Architecture | PIC18 8-bit RISC, ROM-less | PIC18 8-bit RISC, ROM-less | PIC18C 8-bit RISC, ROM-less | PIC18C 8-bit RISC, ROM-less | PIC18F 8-bit RISC, integrated Flash | PIC18F 8-bit RISC, integrated Flash | PIC18F 8-bit RISC, integrated Flash |
| Maximum CPU Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) | 40 MHz (10 MIPS) |
| SRAM Size | 1536 bytes | 1536 bytes | 1536 bytes | 1536 bytes | 3840 bytes | 3840 bytes | 3904 bytes |
| Program Memory Type | External (ROM-less, external memory bus) | External (ROM-less) | External (ROM-less) | External (ROM-less) | Internal 128 KB Flash | Internal 64 KB Flash | Internal 128 KB Flash |
| Supply Voltage Range | 2.0 V to 5.5 V (LC low-voltage) | 2.0 V to 5.5 V (LC) | 4.2 V to 5.5 V (C original) | 4.2 V to 5.5 V (C original) | 2.0 V to 5.5 V (F) | 2.0 V to 5.5 V (F) | 2.0 V to 5.5 V (F) |
| I/O Pins | 26 | 26 | 26 | 26 | 68 (more peripheral-rich) | 68 | 68 |
أبرز الفروقات
- Low-voltage 2.0 V to 5.5 V operation (مقابلPIC18C601T-I/PT)
- True ROM-less with external memory bus (مقابلPIC18F8720-E/PT)
- Long product lifecycle with Microchip longevity program (مقابلGeneric 8-bit ROM-less MCUs)
ملاحظات التصميم
Estimated layout: place the TQFP-64 PIC18LC601 and external program memory device (e.g. SST39SF010 Flash) within 50 mm of each other to keep the parallel address/data traces short. Route the address bus (PORTA, PORTH on extended variants) and data bus (PORTB-PORTG) as length-matched groups with controlled impedance (50 ohm target) on a 4-layer PCB with continuous ground plane. Avoid routing bus signals across split planes or near switching power converter edges.
Decouple each VDD/VSS pair on the LC601 with a 100 nF ceramic capacitor placed within 3 mm of the pins, plus a 10 uF bulk tantalum or ceramic near the package. Add a 10 uF bulk on AVDD/AVSS with a ferrite bead to isolate analog supply noise from digital switching. Estimated quiescent current of the LC601 is under 10 mA at 25 MHz, so a 100 mA LDO (MCP1700 family) is sufficient for this MCU alone but must be sized for external memory and peripherals.
Do not omit an external supervisor / reset IC such as the MCP130 family - the LC601's MCLR input is sensitive to brownouts below 2.0 V and may enter undefined states. Do not assume the 'LC' suffix automatically means 3.3 V - the LC601 operates from 2.0 V to 5.5 V with frequency derating below 4.2 V. When migrating PIC18C firmware to PIC18LC, verify that all timing-dependent code paths still meet setup/hold requirements at the chosen lower VDD. ROM-less means PC RAM does not include program storage - external memory interface must be configured at reset before code execution.
معلومات الامتثال
RoHS/REACH status not explicitly stated in verified web data; Microchip PIC18 family is generally RoHS compliant and lead-free, but specific LC601 lot marking must be confirmed with distributor CoC. AEC-Q100 not applicable to legacy 8-bit MCU - choose automotive-grade PIC18F variants for AEC-Q100 requirements.
