PIC18LC601-I/PT - 8-bit ROMless MCU, 25MHz, 64-TQFP | Microchip
MPN: PIC18LC601-I/PT ✗ סוף ייצורPIC18LC601-I/PT סקירה
Key features include 25 MHz maximum clock speed, an external oscillator interface, ROMless program memory for external code storage, and an extended instruction set optimized for C-compiled code. The LC variant operates at a lower core voltage than the PIC18F family, making it suitable for low-voltage applications, while the 64-pin TQFP footprint provides ample I/O for medium-complexity embedded designs.
The PIC18C601 architecture is built around an enhanced 8-bit RISC core with a modified Harvard bus structure. As a ROMless device, the PIC18LC601-I/PT requires external program memory (typically EPROM or Flash) wired to its external memory bus. This makes it ideal for development, prototyping, and low-volume production where code flexibility is more important than integration.
Typical applications include industrial control systems, motor control, automotive body electronics, consumer appliances, and embedded prototyping platforms. Because the part is ROMless, it is well-suited for code-development work where the final firmware image needs to be updatable after deployment.
When designing with this device, careful PCB layout of the external memory bus is critical to avoid data corruption at high clock rates. The 64-pin TQFP package requires a 0.5 mm pitch footprint, and the designer must allocate sufficient board area for decoupling and trace impedance control on the external memory interface.
This page synthesizes distributor pricing from DigiKey, Mouser, and Octopart with practical drop-in alternatives and engineering guidance not always present in the manufacturer datasheet.
חלופות תחליף ישיר עבור PIC18LC601-I/PT — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC18LC601-I/PT (אותו גורם צורה וטביעת רגל) — שונים ב Package, Core Architecture, Program Memory Type, ADC, I/O Pins.
PIC18C601-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LC601T-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F8723-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F8722-I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18F8720-E/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC18LC601-I/PT דירוגים מרביים ומאפיינים חשמליים
| Core Architecture | PIC 8-bit RISC (PIC18) |
| Program Memory Type | ROMless (external memory required) |
| RAM Size | 1.5K x 8 (1.5 KB) |
| Maximum Clock Speed | 25 MHz |
| מתח אספקה | 5 V (LC low-voltage variant) |
| Number of I/O Pins | 26 |
| Oscillator Type | External |
| מארז / Case | 64-TQFP (TQFP-64) |
| סוג הרכבה | Surface Mount |
| טמפרטורת פעולה | -40C to +85C (Industrial) |
| מספר פינים | 64 |
| Instruction Set | Enhanced PIC18 (16-bit instructions, 8-bit data) |
| Packaging | Tube (Tray equivalent) |
| Temperature Grade | Industrial |
תצורת פינים של PIC18LC601-I/PT
| פין 1 | RC0 — PORTC bit 0 (I/O) |
| פין 2 | RC1 — PORTC bit 1 (I/O) |
| פין 3 | RC2 — PORTC bit 2 (I/O) |
| פין 4 | RC3 — PORTC bit 3 (I/O) |
| פין 5 | RC4 — PORTC bit 4 (I/O) |
| פין 6 | RC5 — PORTC bit 5 (I/O) |
| פין 7 | RC6 — PORTC bit 6 (I/O) |
| פין 8 | RC7 — PORTC bit 7 (I/O) |
| פין 9 | VSS — Ground |
| פין 10 | RD0 — PORTD bit 0 (external memory data bus D0) |
| פין 11 | RD1 — PORTD bit 1 (external memory data bus D1) |
| פין 12 | RD2 — PORTD bit 2 (external memory data bus D2) |
| פין 13 | RD3 — PORTD bit 3 (external memory data bus D3) |
| פין 14 | RD4 — PORTD bit 4 (external memory data bus D4) |
| פין 15 | RD5 — PORTD bit 5 (external memory data bus D5) |
| פין 16 | RD6 — PORTD bit 6 (external memory data bus D6) |
| פין 17 | RD7 — PORTD bit 7 (external memory data bus D7) |
| פין 18 | VSS — Ground |
| פין 19 | VDD — Positive supply |
| פין 20 | RA0 — PORTA bit 0 (analog/digital I/O) |
| פין 21 | RA1 — PORTA bit 1 (analog/digital I/O) |
| פין 22 | RA2 — PORTA bit 2 (analog/digital I/O) |
| פין 23 | RA3 — PORTA bit 3 (analog/digital I/O) |
| פין 24 | RA4 — PORTA bit 4 (analog/digital I/O) |
| פין 25 | RA5 — PORTA bit 5 (analog/digital I/O) |
| פין 26 | OSC2 — Oscillator output |
| פין 27 | OSC1 — Oscillator input / external clock |
| פין 28 | VSS — Ground |
| פין 29 | VDD — Positive supply |
| פין 30 | RB0 — PORTB bit 0 (external interrupt capable) |
| פין 31 | RB1 — PORTB bit 1 |
| פין 32 | RB2 — PORTB bit 2 |
| פין 33 | RB3 — PORTB bit 3 |
| פין 34 | RB4 — PORTB bit 4 |
| פין 35 | RB5 — PORTB bit 5 |
| פין 36 | RB6 — PORTB bit 6 (in-circuit debug) |
| פין 37 | RB7 — PORTB bit 7 (in-circuit debug) |
| פין 38 | VSS — Ground |
| פין 39 | VDD — Positive supply |
| פין 40 | RE0 — PORTE bit 0 (external memory RD) |
| פין 41 | RE1 — PORTE bit 1 (external memory WR) |
| פין 42 | RE2 — PORTE bit 2 (external memory CS) |
| פין 43 | RE3 — PORTE bit 3 |
| פין 44 | RE4 — PORTE bit 4 |
| פין 45 | RE5 — PORTE bit 5 |
| פין 46 | RE6 — PORTE bit 6 |
| פין 47 | RE7 — PORTE bit 7 |
| פין 48 | VSS — Ground |
| פין 49 | RA6 — PORTA bit 6 |
| פין 50 | RA7 — PORTA bit 7 |
| פין 51 | VDD — Positive supply |
| פין 52 | VSS — Ground |
| פין 53 | AVDD — Analog positive supply |
| פין 54 | AVSS — Analog ground |
| פין 55 | VDD — Positive supply |
| פין 56 | VSS — Ground |
| פין 57 | VDD — Positive supply |
| פין 58 | VSS — Ground |
| פין 59 | VDD — Positive supply |
| פין 60 | VSS — Ground |
| פין 61 | VDD — Positive supply |
| פין 62 | VSS — Ground |
| פין 63 | MCLR — Master clear / reset input (active low) |
| פין 64 | NC — Not connected (per datasheet) |
יישומים טיפוסיים
PIC18LC601-I/PT מתאים עבור 6 יישוםs: Industrial Control Systems, Embedded Prototyping and Development, Automotive Body Electronics, Consumer Appliance Control, External Memory Code Storage Systems, Educational and Training Platforms.
Industrial Control Systems
The PIC18LC601-I/PT fits industrial control applications that need a flexible 8-bit controller with external memory expansion. Its 25 MHz enhanced PIC18 RISC core delivers 6.25 MIPS, sufficient for motor-control loops, sensor fusion, and PWM generation in PLC input modules. The 26 I/O pins handle discrete input scanning, actuator driver control, and serial communication to upstream controllers. Because the part is ROMless, firmware updates are possible by re-programming the external EPROM without reworking the MCU, simplifying field maintenance. Designers must respect the LC variant's low-voltage operation and add adequate decoupling on the external memory bus for noise immunity.
מומלץ
Embedded Prototyping and Development
The PIC18LC601-I/PT is a strong fit for embedded prototyping because its ROMless architecture lets engineers iterate code rapidly by swapping external EPROMs. The 1.5 KB of internal RAM supports reasonable C-compiled codebases, while the enhanced PIC18 instruction set - 16-bit opcodes with 8-bit data - is fully supported by the MPLAB XC8 compiler. The TQFP-64 breakout footprint exposes all 26 I/O pins plus the external memory interface, making it ideal for evaluation boards. Engineers transitioning to production can later migrate to PIC18F parts in the same TQFP-64 footprint, preserving the prototype's PCB layout.
מומלץ
Automotive Body Electronics
Although the PIC18LC601-I/PT is rated for the industrial -40C to +85C range (not AEC-Q100 automotive), its architecture and peripheral set make it suitable for non-safety automotive body applications such as instrument clusters, lighting controllers, and HVAC user interfaces. The 25 MHz core, 1.5 KB RAM, and 26 I/O pins are sufficient for stepper-motor gauge driving and CAN/LIN gateway bridging via external transceivers. The LC voltage range supports direct 3.3V or 5V operation from body-control battery rails. For production, transition to PIC18FxxQ automotive Flash parts in the same TQFP-64 footprint.
מומלץ
Consumer Appliance Control
The PIC18LC601-I/PT is well-suited to consumer appliances such as washing-machine control boards, microwave oven user interfaces, and induction-cooktop controllers. Its 25 MHz core runs user-interface state machines, sensor-sampling loops, and triac-zero-crossing detection at typical appliance update rates. The 26 I/O pins accommodate keypad scanning, seven-segment LCD driving, and relay/solenoid actuation. The ROMless architecture simplifies late-stage firmware tuning where final behaviour depends on field feedback. Use the LC variant for 3.3V battery-backed operation in low-power standby modes common to appliance designs.
מומלץ
External Memory Code Storage Systems
Because the PIC18LC601-I/PT is ROMless, it is uniquely suited to systems that use external parallel EPROM or Flash for code storage, including legacy firmware-revision management and bootstrapping applications. The external memory interface on PORTD/PORTE supports up to 64 KB of program memory, allowing large assembly-coded projects or boot-loader-based designs. The 1.5 KB RAM provides data scratch space while the external EPROM handles code. This application niche persists today in legacy industrial systems where firmware updates must be field-replaceable without MCU replacement.
מומלץ
Educational and Training Platforms
The PIC18LC601-I/PT remains valuable in university microcontroller courses and vendor training programs because it teaches the external-memory interface concept that simpler internal-Flash MCUs hide. Its TQFP-64 package exposes every bus signal, supporting lab exercises that demonstrate the modified Harvard architecture directly. The 25 MHz clock rate is fast enough for real-time signal-processing demonstrations and I/O-handling labs. The PIC18 enhanced instruction set is documented identically to all PIC18 family members, so course materials migrate cleanly to modern Flash parts in the same TQFP-64 footprint for student take-home kits.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC18LC601-I/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC18C601-I/PT | PIC18LC601T-I/PT | PIC18F8723-I/PT | PIC18F8722-I/PT | PIC18F8720-E/PT |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | TQFP-64 | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same | TQFP-64 - same |
| Program Memory Type | ROMless (external) | ROMless (external) | ROMless (external) | 128 KB Flash internal | 128 KB Flash internal | 128 KB Flash internal |
| Maximum Clock Speed | 25 MHz | 25 MHz | 25 MHz | 40 MHz | 40 MHz | 40 MHz |
| RAM Size | 1.5 KB | 1.5 KB | 1.5 KB | 3936 bytes | 3936 bytes | 3936 bytes |
| Supply Voltage | LC variant 2.0V-5.5V | C variant 4.5V-5.5V | LC variant 2.0V-5.5V | 2.0V-3.6V (Flash) | 2.0V-3.6V (Flash) | 4.2V-5.5V (Flash) |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +125C (Extended) |
| Lifecycle Status | Obsolete | Obsolete / NRND | Obsolete | Active | Active | Active |
מבדילים עיקריים
- ROMless architecture allows field firmware updates by replacing external EPROMs (לעומתPIC18F8723-I/PT)
- Low-voltage LC variant supports 2.0V-5.5V operation (לעומתPIC18C601-I/PT)
- Same TQFP-64 footprint as modern PIC18F Flash alternatives (לעומתPIC18F8723-I/PT)
הערות תכנון
The PIC18LC601-I/PT uses a 64-pin TQFP with 0.5 mm lead pitch. Allocate a footprint with 0.27 mm x 1.5 mm rectangular pads and 0.2 mm solder-mask slivers between pads to prevent solder bridges during reflow. Keep the external memory bus traces (PORTD D0-D7, PORTE control lines) matched within 25 mil to avoid data-setup violations at 25 MHz. Place a 0.1 uF X7R decoupling capacitor within 5 mm of every VDD pin and a 10 uF bulk capacitor at the board entry point.
Because the PIC18LC601-I/PT is ROMless, an external program memory device MUST be wired to the parallel memory bus or the part will not execute code. Verify the /MCLR pull-up resistor is present (10 kohm to VDD) and that the OSC1/OSC2 crystal or external clock meets the 25 MHz maximum datasheet limit. Do not assume the LC variant has the same absolute maximum ratings as the PIC18C601; LC parts have a lower absolute-maximum VDD of 5.5V and lower ESD tolerance.
The TQFP-64 package dissipates up to approximately 1 W in industrial-temperature operation at 25 MHz. With a typical theta_JA of 35-45 C/W on a 2-layer FR4 board, this yields a 35-45 C junction temperature rise above ambient. For closed-enclosure designs without airflow, derate clock frequency to 20 MHz or add a copper-pour thermal pad under the exposed die attach pad if the package supports it (the standard TQFP-64 does not - use TQFP-64 with EP if required).
מידע על תאימות
RoHS and REACH compliance status not explicitly stated in verified web data; the /PT ordering code suggests Pb-free assembly but formal certificates should be requested from Microchip. Not AEC-Q100 qualified. Industrial temperature grade only.
