PIC16C662-20/PT - 8-Bit OTP MCU 7KB 20MHz TQFP-44 | Microchip
MPN: PIC16C662-20/PT ✗ Cuối đờiPIC16C662-20/PT Tóm tắt
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, ROM/Flash, and peripherals on one die, optimized for embedded control tasks. The PIC16C662 belongs to Microchip's mid-range PIC16 family, which sits between the baseline PIC10/12/16 devices and the high-performance PIC18/dsPIC families. Within the system hierarchy, this device is classified as a microcontroller -> embedded controller -> semiconductor IC. OTP memory means the program can be written once (unlike Flash which is rewritable), which makes the part suitable for low-volume production, prototyping, and legacy systems already in field service.
Key features of the PIC16C662-20/PT include five 8-bit I/O ports, three timer/counters, a Watchdog Timer with its own on-chip RC oscillator, a 5-channel 8-bit Analog-to-Digital Converter (ADC), and two analog comparators. The device operates from 4V to 6V (typical 5V), supports in-circuit serial programming via two pins, and provides power-saving SLEEP mode. The brown-out reset and power-on reset circuits are integrated, eliminating external reset components in many designs.
The PIC16C662 architecture uses a Harvard-style RISC core with a 14-bit instruction word, a single accumulator (W register), and an instruction pipeline that delivers most instructions in one cycle, giving approximately 5 MIPS throughput at 20 MHz. The 35 single-word instructions and 8-level deep hardware stack make the core deterministic and simple to program in assembly or C, which is why PIC16C-series MCUs remain embedded in industrial controllers, appliance controls, and legacy instrumentation.
Typical applications include industrial control panels, HVAC thermostats and fan controllers, security alarm keypads, automotive dashboard sub-modules, vending machine controllers, and legacy LCD/LED display controllers. The 44-pin TQFP footprint provides sufficient I/O for keypad scanning, sensor conditioning through the ADC, and PWM-driven motor or buzzer control.
When designing with this device, ensure the OTP programming window (verified by Microchip programming specifications) is used during code development. Pin 1 orientation on the TQFP must be observed per the package marking, and decoupling capacitors of 0.1 µF plus 10 µF tantalum should be placed close to VDD/VSS pairs to suppress switching noise on the analog ADC channels.
Bộ thay thế dễ dàng lắp đặt cho PIC16C662-20/PT — 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 PIC16C662-20/PT (cùng hình factor và footprint) — khác nhau ở Package, Core Architecture, Program Memory Type, Program Memory Size, Watchdog Timer.
PIC16F662-I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C662-20I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C662-04I/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C662-10E/PT
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C662-20/PQ
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C662-20/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16C Mid-Range 8-bit RISC |
| Program Memory Size | 7 KB (4K x 14 OTP) |
| RAM Size | 176 bytes |
| Maximum CPU Frequency | 20 MHz |
| Operating Voltage Range | 4 V to 6 V (5 V typical) |
| I/O Pins | 33 |
| ADC | 5 channels x 8-bit |
| Timers | 3 x 8-bit Timer/Counter |
| Analog Comparators | 2 |
| Watchdog Timer | Yes, with dedicated RC oscillator |
| Instruction Set | 35 single-word instructions (14-bit) |
| Hardware Stack | 8 levels deep |
| Hộp | 44-pin TQFP (PT) 10x10 mm |
| ICSP Programming | Yes (In-Circuit Serial Programming) |
| Brown-Out Reset | Yes |
| Power-On Reset | Yes |
Cấu hình chân PIC16C662-20/PT
| Chân 1 | MCLR/VPP — Master clear reset or programming voltage input |
| Chân 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Chân 5 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / ADC reference |
| Chân 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / slave select |
| Chân 8 | VSS — Ground reference |
| Chân 9 | OSC1/CLKIN — Oscillator crystal input or external clock |
| Chân 10 | OSC2/CLKOUT — Oscillator crystal output or clock out |
| Chân 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock in |
| Chân 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Chân 13 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM1 |
| Chân 14 | RC3 — PORTC bit 3 |
| Chân 15 | RC4 — PORTC bit 4 |
| Chân 16 | RC5 — PORTC bit 5 |
| Chân 17 | RC6 — PORTC bit 6 |
| Chân 18 | RC7 — PORTC bit 7 |
| Chân 19 | VSS — Ground reference |
| Chân 20 | VDD — Positive supply voltage |
| Chân 21 | RB0/INT — PORTB bit 0 / external interrupt |
| Chân 22 | RB1 — PORTB bit 1 |
| Chân 23 | RB2 — PORTB bit 2 |
| Chân 24 | RB3 — PORTB bit 3 |
| Chân 25 | RB4 — PORTB bit 4 |
| Chân 26 | RB5 — PORTB bit 5 |
| Chân 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 28 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 29 | VSS — Ground reference |
| Chân 30 | VDD — Positive supply voltage |
| Chân 31 | RD0 — PORTD bit 0 |
| Chân 32 | RD1 — PORTD bit 1 |
| Chân 33 | RD2 — PORTD bit 2 |
| Chân 34 | RD3 — PORTD bit 3 |
| Chân 35 | RD4 — PORTD bit 4 |
| Chân 36 | RD5 — PORTD bit 5 |
| Chân 37 | RD6 — PORTD bit 6 |
| Chân 38 | RD7 — PORTD bit 7 |
| Chân 39 | VSS — Ground reference |
| Chân 40 | VDD — Positive supply voltage |
| Chân 41 | RE0/RD — PORTE bit 0 / parallel slave port read |
| Chân 42 | RE1/WR — PORTE bit 1 / parallel slave port write |
| Chân 43 | RE2/CS — PORTE bit 2 / parallel slave port chip select |
| Chân 44 | NC — Not connected (per datasheet pinout) |
Ứng dụng tiêu biểu
PIC16C662-20/PT phù hợp cho 6 Áp dụngs: Industrial Control Panels, HVAC Thermostats and Fan Controllers, Security Alarm Keypads, Vending Machine Controllers, Automotive Dashboard Sub-Modules, Legacy LCD/LED Display Controllers.
Industrial Control Panels
The PIC16C662-20/PT suits industrial control panels because its 33 I/O pins and 5-channel 8-bit ADC support keypad scanning, sensor conditioning, and relay-driving outputs. The 20 MHz CPU delivers approximately 5 MIPS, adequate for real-time PLC-style ladder logic emulation, while the 4-6V supply matches legacy 5V industrial backplanes. Brown-out and power-on reset circuits protect against unreliable startup in factory environments with noisy 24V rails stepped down through DC-DC converters.
Được đề xuất
HVAC Thermostats and Fan Controllers
The PIC16C662-20/PT fits HVAC thermostat designs because its three timer/counters generate the PWM signals required for triac-fired fan speed control and proportional valve actuation. The two analog comparators enable direct thermistor interface for temperature sensing, while the 8-bit ADC reads setpoint potentiometers and ambient light sensors. Operating from 5V and packaged in compact 44-pin TQFP, the device drops onto wall-mount thermostat PCBs with minimal board real estate.
Được đề xuất
Security Alarm Keypads
The PIC16C662-20/PT supports security alarm keypads by providing enough I/O to scan 4x4 or 5x5 matrix keypads with debouncing handled in firmware, plus LED indicators driven through PORT C and D. The Watchdog Timer with its own RC oscillator prevents keypad controller lockup, critical for unattended alarm systems. The SLEEP mode reduces quiescent current during armed standby to extend backup battery runtime.
Được đề xuất
Vending Machine Controllers
The PIC16C662-20/PT powers vending machine controllers because its 33 I/O lines drive multiplexed 7-segment displays, bill validators, coin acceptors, and product dispensing relays. The 5-channel ADC reads coin acceptor pulse trains and currency sensors. OTP memory locks the firmware to prevent tampering, an important security consideration for unattended retail vending equipment. The 5V supply aligns with industrial vending machine power buses.
Được đề xuất
Automotive Dashboard Sub-Modules
The PIC16C662-20/PT is found in automotive dashboard sub-modules such as climate control heads, trip computers, and instrument cluster backlight drivers. The 8-bit ADC captures analog sensor inputs (potentiometers, temperature sensors, ambient light) while the PWM-capable timers drive LCD backlight brightness via MOSFET gates. Industrial temperature grade variants like PIC16C662-20I/PT handle under-dash thermal conditions from -40C to +85C.
Được đề xuất
Legacy LCD/LED Display Controllers
The PIC16C662-20/PT drives legacy LCD character displays and multiplexed LED matrix panels in point-of-sale terminals and industrial HMIs. Its PORT B and PORT D drive segment data while PORT C selects rows, enabling software-driven multiplexing at refresh rates above 100 Hz to eliminate flicker. The 20 MHz core computes display updates without visible lag, and the 4-6V supply interfaces directly to standard character LCD modules.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C662-20/PT — 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 | PIC16F662-I/PT | PIC16C662-20I/PT | PIC16C662-04I/PT | PIC16C662-10E/PT | PIC16C662-20/PQ |
|---|---|---|---|---|---|---|
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) | 44-pin TQFP (PT) | 44-pin TQFP (PT) | 44-pin TQFP (PT) | 44-pin MQFP (PQ) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Memory Type | OTP EPROM | Flash | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
| Program Memory | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB | 7 KB |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 10 MHz | 20 MHz |
| Operating Voltage | 4 V to 6 V | 2 V to 5.5 V | 4 V to 6 V | 4 V to 6 V | 4 V to 6 V | 4 V to 6 V |
| Lifecycle Status | NRND | Active | NRND | NRND | NRND | NRND |
Bảo phân biệt quan trọng
- Wider operating voltage range with Flash memory (vsPIC16F662-I/PT)
- Industrial temperature grade option available (vsPIC16C662-20I/PT)
- Same die available in 4 MHz speed grade (vsPIC16C662-04I/PT)
Ghi chú thiết kế
The PIC16C662-20/PT operates from 4 V to 6 V (5 V typical). Place a 0.1 µF ceramic decoupling capacitor within 5 mm of each VDD pin (three VDD pins on this package) and a single 10 µF tantalum or aluminum bulk capacitor on the board supply rail. For analog reference integrity, isolate AVSS/AVDD from noisy digital lines with a ferrite bead if the ADC accuracy is critical.
OTP (One-Time-Programmable) EPROM memory can only be programmed once per address. Verify firmware completely using a Flash-equipped development part (PIC16F662-I/PT) or simulator before committing production units to OTP programming. Once programmed, OTP bits cannot be erased, so any bug becomes a permanent hardware defect on that device.
TQFP packages have perimeter leads on 0.8 mm pitch with a 10x10 mm body. Use solder paste stencil apertures of 0.25 mm width and a reflow profile with peak temperature of 245-250C for lead-free or 220-225C for leaded solder. Pin 1 is identified by a dot marker on the package top surface; orient the silkscreen outline accordingly.
Thông tin tuân thủ
RoHS/REACH/lead-free status not explicitly stated in the Verified Web Data. Microchip PIC16C-series OTP parts were typically offered in both leaded and lead-free variants; consult the device marking or the manufacturer product page for confirmation. AEC-Q100 qualification is not applicable for this general-purpose industrial MCU.