PIC18LC601-I/PT - 8-bit ROMless MCU, 25MHz, 64-TQFP | Microchip
料号： PIC18LC601-I/PT ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $11.5 | $11.50 |
| 10 | $10.35 | $103.50 |
| 100 | $9.25 | $925.00 |
| 500 | $8.4 | $4,200.00 |
| 1,000 | $7.65 | $7,650.00 |
PIC18LC601-I/PT 概述
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.
直接替换替代料： PIC18LC601-I/PT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC18LC601-I/PT （相同外形与封装尺寸） ——差异在于 Package, Core Architecture, Program Memory Type, ADC, I/O Pins.
快速对比工具——选择替代料号进行并排对比：
PIC18C601-I/PT
✅ 直接替换✓ 有现货
$6.08 / 个
查看数据手册 →PIC18LC601T-I/PT
✅ 直接替换✓ 有现货
$6.2 / 个
查看数据手册 →PIC18F8723-I/PT
✅ 直接替换✓ 有现货
$7.95 / 个
查看数据手册 →PIC18F8722-I/PT
✅ 直接替换✓ 有现货
$6.5 / 个
查看数据手册 →PIC18F8720-E/PT
✅ 直接替换✓ 有现货
$9.3 / 个
查看数据手册 →PIC18LC601-I/PT 最大额定值与电气特性
| 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 |
| 电源电压 | 5 V (LC low-voltage variant) |
| Number of I/O Pins | 26 |
| Oscillator Type | External |
| 封装 / 外壳 | 64-TQFP (TQFP-64) |
| 安装类型 | Surface Mount |
| 工作温度 | -40C to +85C (Industrial) |
| 引脚数量 | 64 |
| Instruction Set | Enhanced PIC18 (16-bit instructions, 8-bit data) |
| Packaging | Tube (Tray equivalent) |
| Temperature Grade | Industrial |
PIC18LC601-I/PT 引脚配置
| 引脚 1 | RC0 — PORTC bit 0 (I/O) |
| 引脚 2 | RC1 — PORTC bit 1 (I/O) |
| 引脚 3 | RC2 — PORTC bit 2 (I/O) |
| 引脚 4 | RC3 — PORTC bit 3 (I/O) |
| 引脚 5 | RC4 — PORTC bit 4 (I/O) |
| 引脚 6 | RC5 — PORTC bit 5 (I/O) |
| 引脚 7 | RC6 — PORTC bit 6 (I/O) |
| 引脚 8 | RC7 — PORTC bit 7 (I/O) |
| 引脚 9 | VSS — Ground |
| 引脚 10 | RD0 — PORTD bit 0 (external memory data bus D0) |
| 引脚 11 | RD1 — PORTD bit 1 (external memory data bus D1) |
| 引脚 12 | RD2 — PORTD bit 2 (external memory data bus D2) |
| 引脚 13 | RD3 — PORTD bit 3 (external memory data bus D3) |
| 引脚 14 | RD4 — PORTD bit 4 (external memory data bus D4) |
| 引脚 15 | RD5 — PORTD bit 5 (external memory data bus D5) |
| 引脚 16 | RD6 — PORTD bit 6 (external memory data bus D6) |
| 引脚 17 | RD7 — PORTD bit 7 (external memory data bus D7) |
| 引脚 18 | VSS — Ground |
| 引脚 19 | VDD — Positive supply |
| 引脚 20 | RA0 — PORTA bit 0 (analog/digital I/O) |
| 引脚 21 | RA1 — PORTA bit 1 (analog/digital I/O) |
| 引脚 22 | RA2 — PORTA bit 2 (analog/digital I/O) |
| 引脚 23 | RA3 — PORTA bit 3 (analog/digital I/O) |
| 引脚 24 | RA4 — PORTA bit 4 (analog/digital I/O) |
| 引脚 25 | RA5 — PORTA bit 5 (analog/digital I/O) |
| 引脚 26 | OSC2 — Oscillator output |
| 引脚 27 | OSC1 — Oscillator input / external clock |
| 引脚 28 | VSS — Ground |
| 引脚 29 | VDD — Positive supply |
| 引脚 30 | RB0 — PORTB bit 0 (external interrupt capable) |
| 引脚 31 | RB1 — PORTB bit 1 |
| 引脚 32 | RB2 — PORTB bit 2 |
| 引脚 33 | RB3 — PORTB bit 3 |
| 引脚 34 | RB4 — PORTB bit 4 |
| 引脚 35 | RB5 — PORTB bit 5 |
| 引脚 36 | RB6 — PORTB bit 6 (in-circuit debug) |
| 引脚 37 | RB7 — PORTB bit 7 (in-circuit debug) |
| 引脚 38 | VSS — Ground |
| 引脚 39 | VDD — Positive supply |
| 引脚 40 | RE0 — PORTE bit 0 (external memory RD) |
| 引脚 41 | RE1 — PORTE bit 1 (external memory WR) |
| 引脚 42 | RE2 — PORTE bit 2 (external memory CS) |
| 引脚 43 | RE3 — PORTE bit 3 |
| 引脚 44 | RE4 — PORTE bit 4 |
| 引脚 45 | RE5 — PORTE bit 5 |
| 引脚 46 | RE6 — PORTE bit 6 |
| 引脚 47 | RE7 — PORTE bit 7 |
| 引脚 48 | VSS — Ground |
| 引脚 49 | RA6 — PORTA bit 6 |
| 引脚 50 | RA7 — PORTA bit 7 |
| 引脚 51 | VDD — Positive supply |
| 引脚 52 | VSS — Ground |
| 引脚 53 | AVDD — Analog positive supply |
| 引脚 54 | AVSS — Analog ground |
| 引脚 55 | VDD — Positive supply |
| 引脚 56 | VSS — Ground |
| 引脚 57 | VDD — Positive supply |
| 引脚 58 | VSS — Ground |
| 引脚 59 | VDD — Positive supply |
| 引脚 60 | VSS — Ground |
| 引脚 61 | VDD — Positive supply |
| 引脚 62 | VSS — Ground |
| 引脚 63 | MCLR — Master clear / reset input (active low) |
| 引脚 64 | NC — Not connected (per datasheet) |
典型应用
PIC18LC601-I/PT 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： PIC18LC601-I/PT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- ROMless architecture allows field firmware updates by replacing external EPROMs （对比 PIC18F8723-I/PT)
- Low-voltage LC variant supports 2.0V-5.5V operation （对比 PIC18C601-I/PT)
- Same TQFP-64 footprint as modern PIC18F Flash alternatives （对比 PIC18F8723-I/PT)
设计说明
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).
合规信息
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.
