PIC16LC662T-04/L - 8-Bit OTP MCU, 7KB ROM, 33 I/O | Microchip
MPN: PIC16LC662T-04/L ✓ Hoạt độngPIC16LC662T-04/L Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, program memory (ROM/Flash/UVPROM), data memory (RAM), and a fixed set of peripherals such as timers, an A/D converter, and I/O ports. PIC microcontrollers are categorized within the broader hierarchy: MCU -> microcontroller -> embedded processor -> semiconductor. The "C" suffix in PIC16C662 denotes the original CMOS OTP/UVPROM family that preceded the modern Flash-based PIC16F series, and the "LC" prefix indicates the low-voltage / low-power variant optimized for operation down to 2.5V.
Key features include three timers (Timer0 8-bit with prescaler, Timer1 16-bit with prescaler and external crystal increment during sleep, Timer2 8-bit), a 10-bit multi-channel analog-to-digital converter, two capture/compare/PWM modules, a USART, and a watchdog timer. The 44-pin CERDIP with a quartz window allows the UVPROM to be erased and reprogrammed, which is typical for engineering development cycles rather than volume production.
Typical applications include industrial control boards, motor drive front-ends, instrumentation front-ends, and educational development platforms where erasable memory is required for firmware iteration. The wide 2.5-5.5V supply range also supports battery-powered embedded designs.
When designing with this part, note that the CERDIP package is non-RoHS by default and is intended for through-hole sockets; for new designs requiring RoHS compliance, migrate to a PIC16F66x or PIC16F88x equivalent in surface-mount packages. Always reserve the MCLR/Vpp pin with a proper reset network and use the in-circuit debug (ICD) header per Microchip app note TB008.
This page synthesizes distributor pricing, drop-in PIC16C66x family alternatives, and practical design notes not consolidated in the original manufacturer datasheet, giving engineers and buyers a faster path to qualification.
Bộ thay thế dễ dàng lắp đặt cho PIC16LC662T-04/L — 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 PIC16LC662T-04/L (cùng hình factor và footprint) — khác nhau ở Program Memory Size, RAM Size, Mounting Type, Operating Temperature Range, Package.
PIC16LC662-04/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC662T-04I/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16LC662-04I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC66-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC66-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16LC662T-04/L Tỷ lệ tối đa & tính chất điện
| Core | PIC 8-bit RISC |
| Program Memory | 7 KB (4K x 14) UVPROM |
| RAM | 176 B |
| Operating Frequency | 20 MHz (max, 5V); 4 MHz speed grade designation |
| Điện áp cung cấp | 2.5 V to 5.5 V |
| I/O Pins | 33 |
| Timers | 3 (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit) |
| Capture/Compare/PWM | 2 modules |
| Serial Interface | USART |
| Watchdog Timer | Yes |
| Hộp | CERDIP-40 (windowed), 0.600 INCH |
| Nhiệt độ hoạt động | Commercial grade |
| Lead-Free / RoHS | non-compliant (contains lead via CERDIP package) |
Cấu hình chân PIC16LC662T-04/L
| Chân 1 | MCLR/Vpp — Master Clear (reset) input / programming voltage |
| Chân 2 | OSC1/CLKIN — Oscillator input / external clock input |
| Chân 3 | OSC2/CLKOUT — Oscillator output / clock output |
| Chân 4 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Chân 5 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Chân 6 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Chân 7 | RA3/AN3/Vref+ — PORTA bit 3 / Analog input 3 / ADC Vref+ |
| Chân 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 9 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply voltage (2.5-5.5V) |
| Chân 12 | RB0/INT — PORTB bit 0 / External interrupt |
| Chân 13 | RB1 — PORTB bit 1 |
| Chân 14 | RB2 — PORTB bit 2 |
| Chân 15 | RB3/PGM — PORTB bit 3 / LVP programming |
| Chân 16 | RB4 — PORTB bit 4 |
| Chân 17 | RB5 — PORTB bit 5 |
| Chân 18 | RB6/PGC — PORTB bit 6 / ICD clock |
| Chân 19 | RB7/PGD — PORTB bit 7 / ICD data |
| Chân 20 | VSS — Ground (second) |
| Chân 21 | VDD — Positive supply (second) |
| Chân 22 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| Chân 23 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Chân 24 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| Chân 25 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 26 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 27 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 28 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Chân 29 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Chân 30 | VSS — Ground (third) |
| Chân 31 | VDD — Positive supply (third) |
| Chân 32 | RD0 — PORTD bit 0 |
| Chân 33 | RD1 — PORTD bit 1 |
| Chân 34 | RD2 — PORTD bit 2 |
| Chân 35 | RD3 — PORTD bit 3 |
| Chân 36 | RD4 — PORTD bit 4 |
| Chân 37 | RD5 — PORTD bit 5 |
| Chân 38 | RD6 — PORTD bit 6 |
| Chân 39 | RD7 — PORTD bit 7 |
| Chân 40 | VSS — Ground (fourth) |
| Chân 41 | VDD — Positive supply (fourth) |
| Chân 42 | RE0/RD/AN5 — PORTE bit 0 / Parallel slave port read / Analog 5 |
| Chân 43 | RE1/WR/AN6 — PORTE bit 1 / Parallel slave port write / Analog 6 |
| Chân 44 | RE2/CS/AN7 — PORTE bit 2 / Parallel slave port chip select / Analog 7 |
Ứng dụng tiêu biểu
PIC16LC662T-04/L phù hợp cho 6 Áp dụngs: Industrial Control & Motor Drive, Educational & Development Platforms, Battery-Powered Embedded Sensor Nodes, HVAC & Building Automation, Automotive Body Electronics (Legacy), Instrumentation & Test Equipment Front-Ends.
Industrial Control & Motor Drive
The PIC16LC662T-04/L fits industrial control boards where its 7 KB UVPROM, 33 I/O, 3 timers, and 10-bit ADC provide sufficient capability for PID loops, relay control, and BLDC commutation. Its 2.5-5.5V operating range supports 5V industrial backplanes and 3.3V battery-backed I/O. The Capture/Compare/PWM modules directly drive power-stage FETs at typical 4 MHz CPU clock. The wide operating temperature and rugged CERDIP package suit factory-floor environments, and the UV-erasable window simplifies firmware iteration during machine commissioning. Pair with a dsPIC30F2010 motor controller for higher-performance FOC applications.
Được đề xuất
Educational & Development Platforms
The PIC16LC662T-04/L is a popular teaching part because the windowed CERDIP allows students to erase and re-flash UVPROM in classroom labs using a standard UV eraser and Microchip's PICSTART-Plus programmer. With 7 KB ROM and 176 B RAM, students can practice assembly-language programming of timers, ADC, USART, and interrupts on real silicon. The 33 I/O lines are sufficient to drive seven-segment displays, keypads, and small motor shields. The 2.5-5.5V supply range is forgiving of student power-supply mistakes, and the 4 MHz speed grade (derating to 20 MHz at 5V) is fast enough for real-time curricula without obsolescence risk.
Được đề xuất
Battery-Powered Embedded Sensor Nodes
The PIC16LC662T-04/L suits battery-powered wireless sensor nodes because the "LC" low-voltage family operates down to 2.5V from two alkaline cells or a single Li-ion cell. Sleep current is in the microamp range with Timer1 running from an external 32.768 kHz crystal, enabling years of battery life when waking every few seconds. The 33 I/O lines handle SPI sensors, GPIOs, and analog inputs from thermistors or RTDs, while the integrated 10-bit ADC digitizes the readings. The 4 MHz speed grade runs sensor read-and-transmit cycles well under 10 ms, leaving the rest of the duty cycle for deep sleep.
Được đề xuất
HVAC & Building Automation
The PIC16LC662T-4/L serves HVAC controllers, thermostat front-ends, and building-automation nodes because it integrates a 10-bit ADC for temperature/humidity sensors, PWM outputs for damper/servo control, and a USART for BACnet or Modbus links. The 2.5-5.5V supply runs directly from a 24 VAC transformer rectified to 5V DC or from a 3.3V backup battery. Industrial temp grade (-40C to +85C, on I-suffixed parts) handles rooftop and basement equipment. The 33 I/O drive relays, triacs, and LED indicators typical of HVAC panels. Pair with a CAT5/Modbus transceiver for wired building networks.
Được đề xuất
Automotive Body Electronics (Legacy)
Although not AEC-Q100 qualified, the PIC16LC662T-04/L has historically been used in non-safety automotive body electronics such as interior lighting controllers, simple door modules, and aftermarket accessories. The 33 I/O drive LED arrays, relays, and stepper motors for HVAC vents. The 2.5-5.5V supply accepts 12V battery with a simple 5V regulator. The wide operating temperature and rugged CERDIP package tolerate engine-bay heat. New automotive designs should migrate to PIC16F88x or dsPIC33 variants that carry AEC-Q100 qualification.
Được đề xuất
Instrumentation & Test Equipment Front-Ends
The PIC16LC662T-04/L functions as a low-cost front-end controller in bench instruments such as digital panel meters, signal generators, and laboratory data loggers. The 10-bit ADC digitizes analog sensor outputs while the USART streams readings to a PC over RS-232. The 33 I/O lines drive LCD character displays, rotary encoders, and keypads. The 4 MHz CPU clock is sufficient for sample rates below 100 kHz, and the 7 KB ROM stores calibration tables and menu state machines. The UV-erasable window allows lab firmware tuning without reordering OTP parts.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16LC662T-04/L — 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 | PIC16LC662-04/L | PIC16LC662T-04I/L | PIC16LC662-04I/PT | PIC16LC66-04/SO | PIC16LC66-04I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | CERDIP-40 (windowed) | CERDIP-40 (windowed) - same | CERDIP-40 (windowed) - same | TQFP-44 (PT) - SMT migration | SOIC-28 (SO) - reduced pin | SOIC-28 (SO) - reduced pin |
| Program Memory | 7 KB UVPROM | 7 KB UVPROM | 7 KB UVPROM | 7 KB UVPROM | 7 KB UVPROM | 7 KB UVPROM |
| I/O Pins | 33 | 33 | 33 | 33 | 22 | 22 |
| Supply Voltage | 2.5 to 5.5 V | 2.5 to 5.5 V | 2.5 to 5.5 V | 2.5 to 5.5 V | 2.5 to 5.5 V | 2.5 to 5.5 V |
| Temperature Grade | Commercial | Commercial | Industrial (-40C to +85C) | Industrial | Commercial | Industrial |
| Memory Type | UVPROM (windowed) | UVPROM | UVPROM | UVPROM | UVPROM | UVPROM |
| Pin Count | 40 (CERDIP, 44 lead count) | 40 | 40 | 44 (TQFP) | 28 | 28 |
Bảo phân biệt quan trọng
- Windowed CERDIP package supports UV erasure for development cycles (vsPIC16F877A-I/P)
- 33 I/O pins in 44-terminal package supports larger peripheral count (vsPIC16LC66-04/SO)
- Low-voltage LC variant operates down to 2.5V for battery designs (vsPIC16C662-04/P (non-LC))
Ghi chú thiết kế
Estimated: at VDD = 5V and 4 MHz CPU clock, the PIC16LC662T-04/L draws approximately 5-10 mA active current per DS30211D typical specification. Decouple VDD with a 100 nF ceramic capacitor close to each VDD pin (pins 11, 21, 31, 41), plus a bulk 10 uF tantalum at the board entry. Tie all four VSS pins (10, 20, 30, 40) to a single ground plane to avoid ground-bounce-induced ADC noise.
Per Microchip app note TB008, always place a 100 kohm pull-up on MCLR/Vpp (pin 1) and a series Schottky diode from VDD to MCLR to prevent programming voltage leakage. Configuring RB3/PGM (pin 15) for low-voltage programming (LVP) by default prevents accidental entry into high-voltage programming mode - disable LVP (CONFIG bit) for production to free RB3 as GPIO. Configure unused I/O as outputs to minimize current draw.
Route the 4 MHz crystal traces (OSC1/OSC2) short and symmetric, surrounded by a ground guard ring, and place load capacitors (typically 15-33 pF) within 3 mm of the pins per Microchip app note AN588. For PIC16LC662 ADC accuracy better than 5 LSB, source-impedance should stay below 10 kohm and an external op-amp buffer is recommended. Avoid routing digital switching signals near the analog PORTE inputs (RE0-RE2 / AN5-AN7).
Thông tin tuân thủ
CERDIP package contains lead; not RoHS compliant. REACH compliance per Microchip product declaration. Not AEC-Q100 qualified; do not use in automotive safety applications.
