PIC16LC621-04/SO - 4MHz 8-Bit CMOS MCU, 1.75KB OTP, 18-SOIC | Microchip
부품 번호: PIC16LC621-04/SO ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $4.33 | $4.33 |
| 10 | $3.9 | $39.00 |
| 100 | $2.86 | $286.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.1 | $2,100.00 |
PIC16LC621-04/SO 개요
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path that fetches, decodes, and executes instructions from on-chip program memory; it sits within the broader hierarchy of microcontroller -> embedded controller -> semiconductor IC -> integrated circuit. The 'LC' prefix in PIC16LC621 indicates a low-power CMOS variant of the PIC16C621 OTP family, optimized for battery and energy-constrained embedded designs while retaining the PIC mid-range instruction set.
Key features of the PIC16LC621-04/SO include 12-bit-wide instruction words, an 8-bit-wide data path, seven or eight special-function hardware registers, a two-level deep hardware stack, and direct, indirect, and relative addressing modes. The device supports internal and external oscillator options typical of the PIC16C62x family, watchdog timer with on-chip RC oscillator, power-on reset, power-saving SLEEP mode, and selectable oscillator start-up timer.
The architecture uses a Harvard-style RISC design with only 35 single-word instructions, enabling predictable real-time response. The EPROM-based program memory supports one-time-programmable field updates and in-circuit programming via Microchip development tools, while the 80-byte RAM and 13 I/O pins are sufficient for small-signal sensing, switch scanning, and motor or relay driving applications.
Typical applications include consumer appliance control, low-end remote controls, sensor signal conditioning, timer/counter-based industrial control, automotive interior modules (sub-systems), and battery-powered portable devices where low quiescent current and the 18-pin SOIC footprint are advantageous. The wide 2.5V-6.0V supply range also enables 3.3V and 5V system designs.
When designing with the PIC16LC621-04/SO, note that OTP memory is one-time programmable - firmware revisions require new parts. For field-upgradeable designs consider PIC16F62x flash variants. Always reserve the MCLR/VPP pin for in-circuit serial programming and decoupling the VDD/VSS pair with 100 nF ceramic capacitors placed within 5 mm of the package pins.
This page synthesizes distributor pricing for 18-SOIC commercial PIC16LC62x variants, drop-in same-package alternatives from the PIC16LC620A/621A family, and practical design notes not collected in a single place in the manufacturer datasheet.
드롭인 대체품: PIC16LC621-04/SO — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: PIC16LC621-04/SO (동일 폼 팩터 및 풋프린트) — 차이점: Program Memory Size, Package, Program Memory Type, Core Architecture, Operating Temperature Range.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
PIC16LC621A-04/SO
✅ 드롭인✓ 재고 있음
$1.75 / 개
데이터시트 보기 →PIC16LC620A-04/SO
✅ 드롭인✓ 재고 있음
$2.15 / 개
데이터시트 보기 →PIC16LC620A-04I/SO
✅ 드롭인✓ 재고 있음
$3.96 / 개
데이터시트 보기 →PIC16LC620A-04E/SO
✅ 드롭인✓ 재고 있음
$2.07 / 개
데이터시트 보기 →PIC16LC620-04I/P
✅ 드롭인✓ 재고 있음
$1.78 / 개
데이터시트 보기 →PIC16LC621-04/SO 최대 정격 & 전기적 특성
| Product Family | PIC16C62x (Mid-Range 8-bit MCU) |
| Core Architecture | 8-bit RISC, Harvard |
| Clock Speed (Max) | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Program Memory Size | 1.75 KB (1K x 14 words) |
| RAM Size | 80 bytes |
| Data EEPROM | Not present |
| I/O Pins | 13 |
| Supply Voltage Range | 2.5 V to 6.0 V |
| 동작 온도 범위 | 0 C to +70 C (Commercial) |
| Instruction Width | 12-bit / 14-bit |
| Hardware Stack | 2-level |
| 패키지 | 18-SOIC (SO-18, 0.300 inch, 7.50 mm body) |
| 실장 유형 | Surface Mount |
PIC16LC621-04/SO 핀 구성
| 핀 1 | MCLR/VPP — Master Clear (reset) input / Programming voltage input |
| 핀 2 | RA0/AN0 — PORTA bit 0 / Analog comparator input |
| 핀 3 | RA1/AN1 — PORTA bit 1 / Analog comparator input |
| 핀 4 | RA2/AN2 — PORTA bit 2 / Analog comparator reference |
| 핀 5 | RA3/AN3 — PORTA bit 3 / Analog comparator output |
| 핀 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| 핀 7 | RA5 — PORTA bit 5 |
| 핀 8 | VSS — Ground reference |
| 핀 9 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| 핀 10 | OSC2/CLKOUT — Oscillator crystal output / clock out (Fosc/4) |
| 핀 11 | RC0 — PORTC bit 0 |
| 핀 12 | RC1 — PORTC bit 1 |
| 핀 13 | RC2 — PORTC bit 2 |
| 핀 14 | RC3 — PORTC bit 3 |
| 핀 15 | RC4 — PORTC bit 4 |
| 핀 16 | RC5 — PORTC bit 5 |
| 핀 17 | RC6 — PORTC bit 6 |
| 핀 18 | RC7 — PORTC bit 7 |
일반적인 애플리케이션
PIC16LC621-04/SO 적합 용도: 7 애플리케이션s: Consumer Appliance Control, Low-End Remote Control and IR Encoder, Battery-Powered Sensor Signal Conditioning, Industrial Timer and Counter Module, Automotive Interior Sub-Systems, Educational and Hobbyist Embedded Projects, White Goods User Interface Controllers.
Consumer Appliance Control
The PIC16LC621-04/SO fits consumer appliance control because its 4 MHz RISC core executes 35 instructions at predictable 1 us per instruction cycle, enabling accurate timing for relay drivers, triac controls, and user-interface button debouncing. The 1.75 KB OTP (1K x 14) holds mid-complexity state-machine firmware for washing-machine cycles, microwave oven timers, or air-conditioner thermostats. The 13 I/O pins multiplex directly to LED indicators, seven-segment displays, keypad matrices, and zero-cross detect inputs without external glue logic, and the 2.5 V-6.0 V supply range lets designers run from rectified mains-derived rails. Industrial-grade temperature variants (PIC16LC620A-04I/SO) extend the same design to kitchen and HVAC environments.
추천
Low-End Remote Control and IR Encoder
The PIC16LC621-04/SO's 80-byte RAM, 4 MHz clock, and 13 I/O are sufficient for IR remote-control encoders using RC-5, NEC, or SIRC protocols. The internal watchdog and SLEEP-mode quiescent current (~1 uA typical for LC family) make it ideal for battery-powered handsets where the device wakes only on button interrupt, transmits a codeword, and returns to sleep. The 2.5 V minimum supply enables two-AAA-cell operation (3 V nominal) without boost converters. Its OTP memory locks the transmission protocol at production, preventing firmware tampering and enabling low-cost cloning-resistant remotes for set-top boxes and consumer A/V gear.
추천
Battery-Powered Sensor Signal Conditioning
For battery-powered sensor signal conditioning, the PIC16LC621-04/SO offers the LC family's low-power CMOS core, integrated analog comparator, and 13 I/O to read thermistor, photodiode, or hall-effect sensors. The PIC16LC62x analog comparator eliminates an external op-amp in threshold-detection designs. With SLEEP current under 5 uA and active current under 2 mA at 4 MHz / 3 V, the device can run for years on a CR2032 cell when duty-cycled. The OTP memory locks calibrated coefficients, and the 18-SOIC package supports compact PCB layouts in wearables and IoT sensor beacons where space is critical.
추천
Industrial Timer and Counter Module
The PIC16LC621-04/SO is well suited to industrial timer/counter modules because its 8-bit Timer0 and Timer1 (typical of PIC16C62x family) with selectable prescalers can measure pulse widths up to 0.25 s at 4 MHz and generate precise event sequencing. The on-chip watchdog timer with dedicated RC oscillator prevents lockup in unattended control panels, conveyor controllers, or motor-protection relays. The 13 I/O drive LEDs, keypad switches, optocouplers, and SSR triggers directly. Industrial-temp and extended-temp variants (PIC16LC620A-04I/SO, PIC16LC620A-04E/SO) operate across -40 C to +125 C for factory-floor and outdoor enclosures.
추천
Automotive Interior Sub-Systems
In automotive interior sub-systems (mirror controls, seat-position memory, interior lighting, climate-mode switches), the PIC16LC621-04/SO provides a cost-optimized OTP controller with 4 MHz timing resolution for debounced switch inputs and PWM LED dimming. The 13 I/O handle CAN/LIN bus wake-up logic via interrupt, seat-motor H-bridge enable signals, and multi-color LED drivers. For under-dash applications the industrial-temp PIC16LC620A-04I/SO covers the -40 C to +85 C automotive interior range. AEC-Q100 qualification is not available on the C62x family; safety-critical ECUs require PIC16F or dsPIC parts instead.
추천
Educational and Hobbyist Embedded Projects
The PIC16LC621-04/SO is a popular entry-level MCU for educational and hobbyist embedded projects because its 35-instruction RISC core, 18-SOIC breadboard-friendly footprint, and Microchip's MPLAB X IDE with free MPASM/XC8 toolchain give students a low-cost, well-documented platform. The 1.75 KB OTP can be erased by UV (windowed CERDIP variant) for repeated development cycles, while production runs use the plastic OTP SO-18. The 13 I/O are sufficient for blinking LEDs, driving seven-segment displays, scanning 4x4 keypads, and interfacing HC-SR04 ultrasonic sensors or DHT11 humidity sensors, all at a part cost under $2 in volume.
추천
White Goods User Interface Controllers
The PIC16LC621-04/SO suits white-goods user-interface controllers (washing-machine, dishwasher, refrigerator panel) where the 1.75 KB OTP holds the state machine for wash cycles, buzzer patterns, and LCD-segment multiplexed displays. The 13 I/O directly drive common-anode LED digit segments and read capacitive-touch electrodes with the integrated analog comparator. The 2.5 V-6.0 V supply accepts rectified 5 V or 12 V rails after regulation. Designers pair this MCU with a high-voltage I/O expander (e.g., ULN2003) for relay switching. The extended-temperature PIC16LC620A-04E/SO supports laundry-room and garage installations where ambient temperatures swing to 60 C.
추천
추천 제품 요약
엔지니어링 참조 데이터: PIC16LC621-04/SO — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | PIC16LC621A-04/SO | PIC16LC620A-04/SO | PIC16LC620A-04I/SO | PIC16LC620A-04E/SO |
|---|---|---|---|---|---|
| Package | 18-SOIC (0.300 inch) | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 0.875 KB OTP | 0.875 KB OTP | 0.875 KB OTP |
| RAM | 80 bytes | 80 bytes | 80 bytes | 80 bytes | 80 bytes |
| I/O Pins | 13 | 13 | 13 | 13 | 13 |
| Max Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Temperature | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C | -40 C to +85 C | -40 C to +125 C |
| Supply Voltage | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to +6.0 V | 2.5 V to +6.0 V |
| Silicon Revision | Original (pre-A) | A revision (improved) | A revision (improved) | A revision (improved) | A revision (improved) |
주요 차별점
- Low-power CMOS LC process extends battery life (vs PIC16C621-04/SO (non-LC variant))
- OTP memory locks firmware against tampering (vs PIC16F628A-I/SO (flash-based))
- Silicon A revision available for new designs (vs PIC16LC621A-04/SO (silicon A refresh))
설계 노트
Decouple VDD (pin 12) and VSS (pin 8) with a 100 nF X7R ceramic capacitor placed within 5 mm of the package pins. For noisy industrial environments add a bulk 10 uF tantalum or aluminum polymer capacitor on the same rail. The PIC16LC62x family is rated 2.5 V to 6.0 V; operating below 2.5 V risks POR (power-on-reset) misbehavior and EEPROM write failure. Always hold MCLR high through a 10 kohm pull-up to VDD; do not leave MCLR floating because noise spikes can trigger spurious resets.
Route the OSC1/OSC2 crystal traces as short, symmetric pairs and place the load capacitors (typically 15-33 pF for HS mode, 10-22 pF for XT) within 5 mm of the oscillator pins to minimize stray capacitance. Avoid routing digital switching signals (PWM, relay drive) under or adjacent to OSC1/2 to prevent clock jitter and unintended phase noise. Place the MCLR/VPP trace away from high-current switching nodes to prevent in-circuit programming failures.
OTP memory is one-time-programmable; firmware bugs after programming require new parts - no field upgrade path. Plan for a windowed CERDIP package (PIC16C621-04/JW) for prototype development cycles. The PIC16LC621's 80-byte RAM is shared with the stack; deep subroutines will collide - keep call depth to two or fewer levels. Do not enable the watchdog timer (WDTE configuration bit) without enabling the prescaler or the device will reset unexpectedly within ~18 ms.
When using the on-chip analog comparator for sensor threshold detection, disable digital outputs on the comparator-input pins (RA0-RA3) by clearing the TRISA bits and avoid reading the same pins immediately after a comparator change - allow 1 us settling time. For noisy motor-control environments add a 1 kohm-10 kohm RC low-pass filter (1 nF) on the comparator input to suppress switching-noise false triggers.
규정 준수 정보
RoHS / REACH / lead-free status not stated explicitly in the verified web data for PIC16LC621-04/SO; marked 'unknown' rather than assumed. PIC16C62x family is not AEC-Q100 qualified - for automotive safety-critical ECUs choose PIC16F or dsPIC AEC-Q100 parts. Conflict-minerals compliance is not declared in the data.
