PIC16C66T-04/SO - 8-Bit 4MHz 14KB OTP MCU 28-SOIC | Microchip
MPN: PIC16C66T-04/SO ✓ Hoạt độngPIC16C66T-04/SO Tóm tắt
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, data RAM, and programmable peripherals. The PIC16C66 belongs to the mid-range PIC architecture, which sits between the PIC16C5x baseline family and the enhanced PIC17C family. Within the broader taxonomy: 8-bit MCU -> RISC microcontroller -> embedded controller -> semiconductor. The PIC16C66 is the higher-memory successor of the PIC16C65 and offers enhanced peripherals while retaining code compatibility with the PIC16C6x family.
Key features of the PIC16C66T-04/SO include 33 digital I/O lines organized across multiple ports, three 8-bit timer/counters with optional prescalers, a 5-channel 8-bit analog-to-digital converter (ADC), a synchronous serial port (SSP) supporting SPI and I²C, a USART for asynchronous or synchronous communications, a watchdog timer with its own on-chip RC oscillator, and a power-on reset / brown-out reset circuit. It operates from a single 4.5 V to 5.5 V supply and supports in-circuit serial programming (ICSP) for the OTP version.
Typical applications include industrial control, motor control, sensor interfacing, automotive body electronics, instrumentation, smart-card readers, and consumer white goods. The 4 MIPS throughput, abundant I/O, and integrated ADC/USART make it ideal for replacing discrete logic in cost-optimized embedded designs.
When designing with this part, allocate the OTP window carefully - once programmed, OTP memory cannot be erased, so dev-cycle iterations should use a windowed (JW) or EPROM variant for prototypes. The 28-SOIC wide-body package simplifies hand-soldering and breadboard prototyping but consumes more board area than SSOP equivalents.
This page synthesizes distributor pricing, drop-in package-compatible alternatives, and practical design notes not found in the standalone Microchip datasheet - giving engineers a single reference for sourcing, replacement, and design decisions.
Bộ thay thế dễ dàng lắp đặt cho PIC16C66T-04/SO — 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 PIC16C66T-04/SO (cùng hình factor và footprint) — khác nhau ở Timers, Program Memory Size, Program Memory Type, Package, ADC.
PIC16C66-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C66T-20/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C66-20/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C66-20I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C66-04I/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65BT-04I/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C63T-04/SO
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C66T-04/SO Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC 8-bit RISC (Mid-Range) |
| Program Memory Type | OTP (One-Time-Programmable) EPROM |
| Program Memory Size | 14 KB (8K x 14) |
| Data RAM | 368 bytes |
| CPU Speed (max) | 4 MHz (4 MIPS) |
| Instruction Cycle Time | 200 ns (single cycle), 400 ns (branch) |
| Instruction Set | 35 single-cycle instructions |
| Điện áp cung cấp | 4.5 V to 5.5 V |
| I/O Pins | 33 |
| Timers | 3 x 8-bit Timer/Counters with prescaler |
| ADC | 8-bit, 5 channels |
| Serial Interfaces | SSP (SPI / I2C), USART |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Brown-out Reset / POR | Yes |
| Hộp | 28-pin SOIC (0.295 in / 7.50 mm wide body) |
| Kiểu lắp đặt | Surface Mount (Gull Wing) |
| Operating Temperature Grade | Commercial |
| Trạng thái RoHS | Compliant |
Cấu hình chân PIC16C66T-04/SO
| Chân 1 | MCLR/Vpp — Master Clear (reset) input / programming voltage |
| 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 / Timer 0 clock input |
| Chân 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Chân 8 | Vss — Digital ground |
| Chân 9 | OSC1/CLKIN — Oscillator crystal input / external clock |
| Chân 10 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Chân 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer 1 oscillator output / clock input |
| Chân 12 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer 1 oscillator input / CCP2 |
| Chân 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Chân 14 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 15 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 16 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 17 | RC6/TX/CK — PORTC bit 6 / USART transmit / clock |
| Chân 18 | RC7/RX/DT — PORTC bit 7 / USART receive / data |
| Chân 19 | Vss — Digital ground |
| Chân 20 | Vdd — Positive digital supply (4.5-5.5 V) |
| 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 |
Ứng dụng tiêu biểu
PIC16C66T-04/SO phù hợp cho 6 Áp dụngs: Industrial Motor Control, Sensor Interface Modules, Automotive Body Electronics, Consumer White Goods Control, Test and Measurement Instrumentation, Smart Card and Access Control Readers.
Industrial Motor Control
The PIC16C66T-04/SO is well suited to small brushed DC and stepper motor control in industrial equipment. Its 4 MIPS throughput, three 8-bit timers with PWM capability, and 33 I/O pins enable precise commutation timing for unipolar and bipolar stepper drives, while the integrated 5-channel 8-bit ADC reads back current-sense amplifiers and tachometer feedback. At 4.5-5.5 V operation the part interfaces directly to industry-standard gate drivers, and the 28-SOIC wide-body package dissipates enough heat for continuous duty at moderate currents. Unlike discrete logic implementations, the integrated USART simplifies RS-485 networking of multiple motor nodes on a factory floor.
Được đề xuất
Sensor Interface Modules
For sensor interface and signal-conditioning modules, the PIC16C66T-04/SO offers a 5-channel 8-bit ADC that digitizes analog sensor outputs directly, while its SSP peripheral handles SPI or I2C digital sensors simultaneously. The 368-byte RAM accommodates moving-average filtering and calibration constants without external memory. The integrated USART streams processed data over RS-232/RS-485 to a host controller. Operating from a single 5 V rail, the part simplifies power architecture for distributed sensor hubs in industrial automation, where the 28-SOIC footprint integrates cleanly onto small interface PCBs alongside op-amps and protection circuitry.
Được đề xuất
Automotive Body Electronics
Within automotive body-control modules, the PIC16C66T-04/SO's 5 V operation and integrated ADC drive functions such as seat-position sensing, mirror control, and lighting dimming. The 33 I/O pins drive relays and read switches directly; the USART links the body controller to a CAN bridge or to other ECUs over LIN. Brown-out reset and watchdog timer with dedicated RC oscillator provide the fail-safe behavior expected in automotive designs. The wide-body 28-SOIC package withstands the thermal cycling and vibration of under-dash mounting while remaining hand-reworkable for low-volume specialty vehicles.
Được đề xuất
Consumer White Goods Control
The PIC16C66T-04/SO's OTP memory, low cost, and 5 V operation make it a strong fit for fixed-function consumer appliances such as washing machines, dishwashers, microwave ovens, and small air conditioners. Its timers handle motor PWM, the ADC reads temperature and water-level sensors, and the USART interfaces with inverter boards or display panels. OTP memory is advantageous here because once the firmware is locked, the part cannot be re-programmed by unauthorized parties, providing IP protection in high-volume consumer products. The 28-SOIC wide-body package simplifies hand-soldering during prototyping and repair.
Được đề xuất
Test and Measurement Instrumentation
For low-cost bench instruments such as handheld multimeters, signal generators, and panel meters, the PIC16C66T-04/SO delivers deterministic real-time response from its 4 MIPS core, drives multiplexed LED or LCD displays via its abundant I/O, and reads measurement signals through its 8-bit ADC. The synchronous serial port (SSP) interfaces to external ADC or DAC chips for higher-precision designs, while the USART streams data to a PC over RS-232. Brown-out reset guarantees clean startups on bench supplies, and the OTP architecture prevents accidental firmware corruption in field-deployed instruments.
Được đề xuất
Smart Card and Access Control Readers
In access-control readers and smart-card interfaces, the PIC16C66T-04/SO provides deterministic timing for ISO 7816 smart-card communication through its USART, plus GPIO for LEDs, buzzers, and relay control. The 5 V I/O matches legacy smart-card supply requirements, eliminating level shifters. The 368-byte RAM accommodates protocol state machines for T=0/T=1 communication, and the 14 KB OTP holds application firmware that can be locked to prevent cloning. The wide-body 28-SOIC package is mechanically robust for door-frame mounted reader housings subject to vibration and temperature swing.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C66T-04/SO — 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 | PIC16C66-04/SO | PIC16C66T-20/SO | PIC16C66-20/SO | PIC16C66-04I/SO | PIC16C63T-04/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (0.295 in, wide body) | 28-SOIC (0.295 in, wide body) - same | 28-SOIC (0.295 in, wide body) - same | 28-SOIC (0.295 in, wide body) - same | 28-SOIC (0.295 in, wide body) - same | 28-SOIC (0.295 in, wide body) - same |
| CPU Speed (max) | 4 MHz (4 MIPS) | 4 MHz (4 MIPS) | 20 MHz (5 MIPS) | 20 MHz (5 MIPS) | 4 MHz (4 MIPS) | 4 MHz (4 MIPS) |
| Program Memory | 14 KB OTP (8K x 14) | 14 KB OTP (8K x 14) | 14 KB OTP (8K x 14) | 14 KB OTP (8K x 14) | 14 KB OTP (8K x 14) | 7 KB OTP |
| Data RAM | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 368 bytes | 192 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 |
| ADC | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels | 8-bit, 5 channels | No ADC |
| Operating Temperature | Commercial (0 to +70 C) | Commercial (0 to +70 C) | Commercial (0 to +70 C) | Commercial (0 to +70 C) | Industrial (-40 to +85 C) | Commercial (0 to +70 C) |
Bảo phân biệt quan trọng
- Same-package drop-in upgrade available at higher speed (vsPIC16C66T-04/SO)
- Tube and Tape-and-Reel packaging options (vsPIC16C66-04/SO vs PIC16C66T-04/SO)
- Family-compatible peripheral set across the PIC16C6x lineup (vsPIC16C63T-04/SO (lower-end family member))
Ghi chú thiết kế
OTP memory cannot be erased. Once programmed, the PIC16C66T-04/SO is locked permanently; use a windowed (JW) ceramic package or the Flash-based PIC16F66 for prototyping. Ensure all code is fully validated before committing to OTP production units - a single bit error wastes the part. Bulk programming should use a qualified Microchip-approved gang programmer with verification enabled.
Estimated: at 4 MHz and 5 V, the PIC16C66T-04/SO draws roughly 5-13 mA active and <1 uA sleep, depending on peripheral enable state. Place a 0.1 uF ceramic decoupling capacitor as close as possible to the Vdd pin (pin 20), plus a bulk 10 uF tantalum or ceramic on the board supply rail. The AVdd pin (when present in this family) should be filtered separately from Vdd with a small ferrite bead or 10 ohm resistor if the ADC is used.
The 28-SOIC wide-body (0.295 in / 7.50 mm) footprint is the same across the entire PIC16C6x family. To maintain programming and debugging compatibility, keep the ICSP pins (RB6/PGC = pin 27, RB7/PGD = pin 28, MCLR/Vpp = pin 1) accessible either as test pads or a 6-pin header. Place the 4 MHz ceramic resonator within 1 cm of pins 9-10 (OSC1/OSC2) to minimize parasitic capacitance; crystal mode requires 22-33 pF load capacitors to GND.
Thông tin tuân thủ
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; this part is intended for industrial and consumer applications, not automotive safety-critical. For automotive applications contact Microchip for AEC-Q100 grade parts in the PIC16F family.
