PIC16LC620A-04/P - 8-bit OTP MCU, 4 MHz, 18-PDIP | Microchip
MPN: PIC16LC620A-04/P ✓ Hoạt độngPIC16LC620A-04/P Tóm tắt
An OTP microcontroller is a programmable MCU whose program memory can be written exactly once, typically during board production or low-volume prototyping. The PIC16C/PIC16LC family belongs to Microchip's mid-range 8-bit architecture, sitting between the baseline PIC10/12/16 families and the higher-end PIC18 family in the broader 8-bit MCU taxonomy, which itself rests under embedded microcontrollers and CMOS logic. The "LC" prefix denotes an extended low-voltage CMOS variant that supports battery-friendly supply rails while remaining code-compatible with the PIC16C620A baseline.
Key features include 35 single-cycle instructions, 12-bit wide instruction words with an 8-bit data path, two comparators with programmable reference, an 8-bit timer/counter, a 16-bit timer/counter, and a watchdog timer with its own on-chip RC oscillator. Brown-out reset and power-on reset simplify board-level firmware reliability. The 18-PDIP footprint (.300 inch) supports legacy through-hole designs, hobbyist prototyping, and educational platforms where socketed parts are commonly used.
The PIC16LC620A-04/P uses a RISC-style Harvard architecture with separate program and data buses, allowing the CPU to fetch the next instruction while accessing the current data memory. The internal oscillator option and flexible I/O mapping reduce external component count, and the low-power CMOS process enables low quiescent current for standby operation in battery-backed equipment.
Typical applications include industrial control logic, automotive body modules (non-safety), sensor conditioning front-ends, low-cost consumer appliances, hobby electronics, and legacy product maintenance. The through-hole PDIP package is also widely used in educational lab kits where the device is frequently re-socketed. The OTP memory suits low-to-medium production volumes where firmware is finalized and frequent re-programming is not required.
When designing with this part, choose an external clock source or crystal consistent with the 4 MHz maximum specification. Ensure the OTP programming algorithm uses Microchip's standard VPP/VDD sequencing, and account for the two-level hardware stack limit when writing firmware that depends on deep subroutines. Verify brown-out reset voltage thresholds against the lowest expected supply rail.
This page consolidates distributor pricing as of 2026-09-22, drop-in alternatives sourced from Microchip's mid-range PIC16 family, and practical design notes that extend beyond the manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC620A-04/P — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với PIC16LC620A-04/P (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Operating Temperature Range, Package, Core Architecture, Instruction Cycle Time.
PIC16LC620-04I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC620-04E/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC620-04/SS
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C620A-04/P
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16F627A-I/P
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC620A-04/P Tỷ lệ tối đa & tính chất điện
| Product Family | PIC16C |
| Core Architecture | 8-bit PIC RISC |
| Core Processor | PIC |
| Core Size | 8-bit |
| Tần số xung maksimum | 4 MHz |
| Instruction Cycle Time | 200 ns (single-cycle, except branches) |
| Program Memory Type | OTP (EPROM-based) |
| Program Memory Size | 896 bytes (512 × 14) |
| RAM Size | 96 bytes |
| I/O Pins | 13 |
| Supply Voltage Range | 2.5 V to 6.25 V |
| Khoảng nhiệt độ hoạt động | 0 °C to +70 °C (commercial) |
| Package Type | 18-pin PDIP (DIP-18) |
| Kiểu lắp đặt | Through-Hole |
| Instruction Set Width | 12-bit instructions, 8-bit data path |
| Number of Instructions | 35 |
| Stack Depth | 2-level hardware stack |
| On-chip Peripherals | 2 comparators, 8-bit TMR0, 16-bit TMR1, watchdog timer |
| Trạng thái RoHS | Not compliant (legacy OTP product) |
| Số chân | 18 |
Cấu hình chân PIC16LC620A-04/P
| Chân 1 | RA2/AN2/CVREF — Bidirectional I/O / analog input / comparator reference output |
| Chân 2 | RA3/AN3/C1OUT — Bidirectional I/O / analog input / comparator 1 output |
| Chân 3 | RA4/T0CKI — Bidirectional I/O / Timer0 clock input |
| Chân 4 | RA5/MCLR/VPP — Bidirectional I/O / master clear (reset) / programming voltage input |
| Chân 5 | VSS — Ground reference |
| Chân 6 | RB0/INT — Bidirectional I/O / external interrupt input |
| Chân 7 | RB1 — Bidirectional I/O |
| Chân 8 | RB2 — Bidirectional I/O |
| Chân 9 | RB3/PGM — Bidirectional I/O / low-voltage programming input |
| Chân 10 | RB4 — Bidirectional I/O |
| Chân 11 | RB5 — Bidirectional I/O |
| Chân 12 | RB6/PGC — Bidirectional I/O / ICSP clock input |
| Chân 13 | RB7/PGD — Bidirectional I/O / ICSP data input/output |
| Chân 14 | VSS — Ground reference (secondary) |
| Chân 15 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Chân 16 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 17 | RA0/AN0 — Bidirectional I/O / analog input 0 |
| Chân 18 | RA1/AN1 — Bidirectional I/O / analog input 1 |
Ứng dụng tiêu biểu
PIC16LC620A-04/P phù hợp cho 6 Áp dụngs: Industrial Control Logic, Appliance and Consumer Electronics, Hobby Electronics and Educational Kits, Sensor Conditioning Front-Ends, Automotive Body Electronics (Non-Safety), Legacy Product Maintenance and Bridge Designs.
Industrial Control Logic
The PIC16LC620A-04/P fits industrial control logic applications that need a deterministic 8-bit RISC core with simple I/O expansion and a wide 2.5-6.25 V supply tolerance for noisy 24 V-derived rails. Its 13 I/O pins drive relays, optocouplers, and discrete logic directly through current-limited pins, while the 896-byte OTP memory holds tightly-scoped ladder-logic replacements for small PLCs and remote sensor nodes. The 4 MHz clock and 200 ns instruction cycle are fast enough for closed-loop PID at modest sampling rates, and the on-chip comparators simplify threshold detection on analog sensor inputs without external op-amps. Compared with higher-pin-count PIC18 parts, the LC620A reduces BOM cost in distributed I/O slices where each node is doing one job.
Được đề xuất
Appliance and Consumer Electronics
In appliance front-panels, washing-machine sub-controllers, and small kitchen electronics, the PIC16LC620A-04/P delivers enough compute for keypad scanning, LED multiplexing, and basic timer sequencing at a price point competitive with bare-logic implementations. The OTP memory locks firmware at production, which protects against field tampering - a value in commercial-grade appliances where firmware must remain stable across the product's warranty window. The two on-chip comparators can monitor line-voltage-derived signals for over-current or zero-cross detection, and the 8-bit/16-bit timers cover wash-cycle, fan-speed PWM, and buzzer-tone generation without external peripherals.
Được đề xuất
Hobby Electronics and Educational Kits
The PIC16LC620A-04/P is widely used in university microcontroller labs and hobby electronics because the 18-pin PDIP is breadboard-friendly, socketed, and easy to swap. Students can program the part with low-cost programmers (PICkit 1/2/3) and the MPLAB IDE, learning assembly language on a 35-instruction RISC core without the complexity of modern Cortex-M parts. The 13 I/O pins support typical lab experiments: 7-segment displays, servo PWM, and UART bit-banging. The OTP memory encourages disciplined firmware versioning because code cannot be patched on-the-fly - the lesson that shaped an entire generation of embedded engineers.
Được đề xuất
Sensor Conditioning Front-Ends
The PIC16LC620A-04/P works well as a low-cost sensor signal-conditioning front-end that digitizes analog inputs, applies linearization in firmware, and outputs a clean PWM or UART signal to a higher-tier controller. The two on-chip comparators with programmable reference simplify window-discriminator designs for temperature, pressure, or optical sensors without adding external analog ICs. The 96-byte RAM supports small lookup tables for sensor linearization curves, and the 4 MHz instruction rate allows oversampling at modest sensor bandwidths. Low quiescent current from the CMOS process lets the MCU stay in sleep mode between readings in battery-powered sensor nodes.
Được đề xuất
Automotive Body Electronics (Non-Safety)
The PIC16LC620A-04/P appears in automotive body-control modules for non-safety functions such as interior lighting, mirror adjust, and seat-position memory, where its 2.5-6.25 V supply range tolerates load-dump and cranking transients on the 12 V bus when paired with external regulation. While the part is not AEC-Q100 qualified, it is used in pre-2010 vehicle platforms that predate widespread automotive-grade MCU requirements, or in aftermarket accessories. The 35-instruction RISC core simplifies MISRA-style coding audits compared with complex instruction sets, which is helpful for vendors managing legacy automotive firmware. New designs should migrate to AEC-Q100 qualified PIC16F or dsPIC parts.
Được đề xuất
Legacy Product Maintenance and Bridge Designs
When maintaining or replicating legacy products whose firmware was developed on the PIC16LC620A-04/P, the part remains the safest source-compatible choice. Because OTP memory cannot be re-read or patched, exact die replacements are essential for warranty repairs on installed equipment; the PIC16LC620A-04/P and its siblings (PIC16LC620-04I/P, PIC16C620A-04/P) are the only fully verified substitutes. For new bridge designs that add modern peripherals while keeping the original firmware call signature, pairing the LC620A with a higher-end PIC16F or PIC18 co-processor via UART creates a backward-compatible field upgrade without invalidating the OTP-coded base unit.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC620A-04/P — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | PIC16LC620-04I/P | PIC16LC620-04E/P | PIC16LC620-04/SS | PIC16C620A-04/P | PIC16F627A-I/P |
|---|---|---|---|---|---|---|
| Package | PDIP-18 | PDIP-18 (same) | PDIP-18 (same) | PDIP-18 (same) | PDIP-18 (same) | PDIP-18 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 1.75 KB Flash |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| RAM Size | 96 B | 96 B | 96 B | 96 B | 96 B | 224 B |
| Internal Oscillator | No | No | No | No | No | Yes (4 MHz internal) |
| Operating Temperature | 0 °C to +70 °C (Commercial) | -40 °C to +85 °C (Industrial) | -40 °C to +125 °C (Extended) | 0 °C to +70 °C (Commercial) | 0 °C to +70 °C (Commercial) | -40 °C to +85 °C (Industrial) |
| Supply Voltage | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 3.0 V to 6.0 V | 2.0 V to 5.5 V |
| Approx Unit Price (USD, qty 1, 2026-09) | 2.10 | 2.20 | 2.30 | 2.05 | 1.95 | 2.40 |
Bảo phân biệt quan trọng
- Lowest-cost OTP option in PIC16C62X family (vsPIC16F627A-I/P)
- Wide 2.5 V to 6.25 V supply range for battery-derived rails (vsPIC16C620A-04/P)
- Through-hole PDIP package suits legacy and educational sockets (vsPIC16F627A-I/SS)
- Two on-chip analog comparators with programmable reference (vsPIC16F84A-04/P)
Ghi chú thiết kế
The PIC16LC620A-04/P operates from 2.5 V to 6.25 V; design the LDO or linear regulator headroom so that cranking transients on automotive 12 V buses do not push VDD above 6.5 V (the absolute maximum). Add a 100 nF ceramic decoupling capacitor within 5 mm of VDD (pin 14) and a 10 µF bulk capacitor near the IC, observing the datasheet's recommended PCB layout pattern. Brown-out reset should be configured for a threshold just above the minimum VDD required for stable oscillator operation.
OTP memory can be programmed only once; verify the firmware image with a windowed EPROM part or a flash-equivalent PIC16F627A-I/P before committing to production programming. The two-level hardware stack means deep call chains will overwrite the return PC - refactor long call chains into iterative loops or use PIC18 parts with a 31-level stack for complex state machines. The internal POR and BOR trip voltages must be configured per the actual supply rail, otherwise spurious resets can occur on slow-ramping supplies.
Keep the OSC1/OSC2 traces short and surrounded by ground pour to reduce EMI susceptibility; place the crystal within 5 mm of the IC. For RC oscillator mode, place the resistor and capacitor close to OSC1 to minimize stray capacitance. The MCLR pin (RA5/MCLR/VPP) needs a 10 kΩ pull-up to VDD for normal operation; during ICSP, the programmer drives this pin to VPP (typically 13.5 V) so a clamping diode to VDD plus a small series resistor is recommended to protect the on-chip ESD structure during in-circuit programming.
When the PIC16LC620A-04/P is bit-banging UART or driving long cables from its I/O pins, add series resistors (100 Ω to 470 Ω) at the driver output to dampen ringing on the cable's characteristic impedance. For PWM-driven loads, the totem-pole output structure supports 25 mA sink/source per pin, but exceeding the absolute maximum total package current (200 mA) can cause voltage drift on VDD - sum the per-pin currents before connecting high-current loads, and use external drivers for relays or solenoids.
Thông tin tuân thủ
PIC16LC620A-04/P is a legacy Microchip OTP product generally listed as non-RoHS because of the PDIP-18 tin-lead lead finish; the part is not AEC-Q100 qualified and is recommended for non-safety automotive and industrial applications only. REACH compliance and conflict-minerals status follow Microchip's standard corporate disclosures for the PIC16 family.
