PIC16C65AT-04I/PT - 8-bit OTP MCU, 7KB, 33 I/O, 44-TQFP | Microchip
MPN: PIC16C65AT-04I/PT ✓ Hoạt độngPIC16C65AT-04I/PT Tóm tắt
An 8-bit OTP microcontroller (MCU) is a Harvard-architecture CMOS device that executes one instruction per clock cycle from non-volatile program memory. OTP versions are programmed once and cannot be erased, which lowers per-unit cost for high-volume fixed-code applications. The PIC16C65A belongs to the PIC16C mid-range family and is positioned above smaller pin-count PIC16C6X parts in the same generation.
Key features include 33 digital I/O pins arranged across multiple ports, an external oscillator interface, two 8-bit timer/counters plus one 16-bit timer/counter, a USART serial port, and a capture/compare/PWM (CCP) module. The 44-pin TQFP package provides a low-profile surface-mount footprint with 0.8 mm pitch and a moderate thermal resistance suitable for forced-air or natural-convection industrial enclosures.
Architecturally the PIC16C65A uses a 14-bit instruction word with a 35-instruction RISC core, separate program and data buses, and a peripheral feature set oriented toward motor, lighting, and instrumentation control loops. Industrial-grade qualification, OTP storage, and the 4 MHz rated clock align with deterministic embedded control tasks where Flash reprogrammability is not required.
Typical applications include industrial control panels, appliance control boards, motor-driver front-ends, sensor-conditioning firmware, and legacy embedded products migrated from PIC16C5X/PIC16C6X designs. Its 33 I/O count is well suited to keypad scanning, LED/LCD multiplexing, and parallel sensor reads.
When designing with this part, note that OTP memory cannot be re-programmed in-circuit; firmware must be fully validated on a windowed or Flash-equivalent development part (e.g. PIC16F877) before committing to the OTP device for production programming. The 4 MHz ceiling also requires that math-heavy routines be reviewed against instruction-cycle budgets.
This page synthesizes distributor pricing, same-brand drop-in alternatives, and applied engineering notes not consolidated on the manufacturer datasheet, giving procurement and firmware teams a faster decision path for legacy 8-bit PIC designs.
Bộ thay thế dễ dàng lắp đặt cho PIC16C65AT-04I/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 PIC16C65AT-04I/PT (cùng hình factor và footprint) — khác nhau ở Program Memory Size, Operating Temperature, Core Architecture, Program Memory Type, ADC.
PIC16C65AT-04E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65A-04I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C65A-20I/PT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C65A-20E/PT
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65A-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65AT-04I/PT Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16C6X, 8-bit RISC, 14-bit instruction word |
| Program Memory Type | One-Time Programmable (OTP) ROM |
| Program Memory Size | 7KB (4K x 14) |
| RAM Size | 192 x 8 bytes |
| Tần số xung maksimum | 4 MHz |
| Supply Voltage (Vdd) | 4.0 V to 6.0 V |
| Number of I/O Pins | 33 |
| Oscillator Type | External |
| Hộp | 44-pin TQFP (PT) |
| Nhiệt độ hoạt động | -40C to +85C (industrial, -I grade) |
| Instruction Count | 35 single-word instructions |
| Timers | Timer0 (8-bit), Timer1 (16-bit), Timer2 (8-bit) |
| Communication Peripherals | USART/SCI |
| CCP Modules | Capture/Compare/PWM x 1 |
| Packaging | Tape & Reel (TR) |
| Kiểu lắp đặt | Surface Mount |
| Lead-Free / RoHS | Compliant (verify lot-level) |
Cấu hình chân PIC16C65AT-04I/PT
| Chân 1 | MCLR — Master Clear (Reset) input, active low |
| Chân 2 | RA0 — PORTA bit 0 (digital I/O) |
| Chân 3 | RA1 — PORTA bit 1 (digital I/O) |
| Chân 4 | RA2 — PORTA bit 2 (digital I/O) |
| Chân 5 | RA3 — PORTA bit 3 (digital I/O) |
| Chân 6 | RA4 — PORTA bit 4 (digital I/O, open-drain option) |
| Chân 7 | RA5 — PORTA bit 5 (digital I/O) |
| Chân 8 | Vss — Ground reference |
| Chân 9 | OSC1 — External oscillator input (crystal/ceramic resonator) |
| Chân 10 | OSC2 — External oscillator output (crystal mode) |
| Chân 11 | RC0 — PORTC bit 0 (digital I/O) |
| Chân 12 | RC1 — PORTC bit 1 (digital I/O) |
| Chân 13 | RC2 — PORTC bit 2 (digital I/O / CCP1) |
| Chân 14 | RC3 — PORTC bit 3 (digital I/O) |
| Chân 15 | RC4 — PORTC bit 4 (digital I/O) |
| Chân 16 | RC5 — PORTC bit 5 (digital I/O) |
| Chân 17 | RC6 — PORTC bit 6 (TX/CK USART) |
| Chân 18 | RC7 — PORTC bit 7 (RX/DT USART) |
| Chân 19 | Vss — Ground reference |
| Chân 20 | Vdd — Positive supply voltage (4.0 V to 6.0 V) |
| Chân 21 | RB0 — PORTB bit 0 (digital I/O, external interrupt) |
| Chân 22 | RB1 — PORTB bit 1 (digital I/O) |
| Chân 23 | RB2 — PORTB bit 2 (digital I/O) |
| Chân 24 | RB3 — PORTB bit 3 (digital I/O) |
| Chân 25 | RB4 — PORTB bit 4 (digital I/O, interrupt-on-change) |
| Chân 26 | RB5 — PORTB bit 5 (digital I/O, interrupt-on-change) |
| Chân 27 | RB6 — PORTB bit 6 (digital I/O / ICSP clock) |
| Chân 28 | RB7 — PORTB bit 7 (digital I/O / ICSP data) |
| Chân 29 | Vss — Ground reference |
| Chân 30 | Vdd — Positive supply voltage (4.0 V to 6.0 V) |
| Chân 31 | RD0 — PORTD bit 0 (digital I/O) |
| Chân 32 | RD1 — PORTD bit 1 (digital I/O) |
| Chân 33 | RD2 — PORTD bit 2 (digital I/O) |
| Chân 34 | RD3 — PORTD bit 3 (digital I/O) |
| Chân 35 | RD4 — PORTD bit 4 (digital I/O) |
| Chân 36 | RD5 — PORTD bit 5 (digital I/O) |
| Chân 37 | RD6 — PORTD bit 6 (digital I/O) |
| Chân 38 | RD7 — PORTD bit 7 (digital I/O) |
| Chân 39 | Vss — Ground reference |
| Chân 40 | Vdd — Positive supply voltage (4.0 V to 6.0 V) |
| Chân 41 | RE0 — PORTE bit 0 (digital I/O / read enable) |
| Chân 42 | RE1 — PORTE bit 1 (digital I/O / write enable) |
| Chân 43 | RE2 — PORTE bit 2 (digital I/O / chip select) |
| Chân 44 | NC — Not connected on 44-pin TQFP package variant (no TOCKI alternate, verify against DS30234D) |
Ứng dụng tiêu biểu
PIC16C65AT-04I/PT phù hợp cho 6 Áp dụngs: Industrial Control Panels, Appliance Control Boards, Motor Driver Front-Ends, Sensor Conditioning Firmware, Legacy Embedded Migration, Lighting Control Systems.
Industrial Control Panels
The PIC16C65AT-04I/PT is well suited to industrial control panels that scan keypads, multiplex 7-segment or character LCDs, and drive relay or SSR outputs via opto-isolated GPIOs. With 33 digital I/O organized across five ports and 192 bytes of SRAM, it can poll 4x4 key matrices, decode rotary-encoder inputs, and sequence indicator LEDs without external I/O expanders. The 4 MHz clock sustains >1 MHz instruction throughput, enough for 50 Hz debounce filtering, state-machine control logic, and Modbus-RTU framing through the on-chip USART. Industrial -40C to +85C rating supports factory-floor enclosures; OTP memory fits fixed firmware shipped in high panel volumes.
Được đề xuất
Appliance Control Boards
The PIC16C65AT-04I/PT serves as the main controller in white-goods and small-appliance boards, where fixed-function OTP code is acceptable and bill-of-material cost is critical. The on-chip 8-bit and 16-bit timer/counters handle motor RPM sensing (via tachogenerator or Hall sensor), triac zero-crossing detection for AC load switching, and PWM generation for variable-speed fan or pump drives through the CCP module. 7KB of program memory accommodates state-machine firmware for washing-machine cycles, dishwasher routines, or HVAC damper control with non-volatile parameter storage in external EEPROM. Industrial -I temp grade withstands appliance-internal hotspots up to 85C.
Được đề xuất
Motor Driver Front-Ends
In small DC and stepper motor driver boards, the PIC16C65AT-04I/PT generates step/direction signals, monitors current-sense amplifiers, and implements closed-loop acceleration/deceleration profiles via the on-chip CCP/PWM and 16-bit Timer1 modules. 33 I/O pins drive multi-axis stepper logic (up to 4 axes with step+direction+enable+microstep lines), read end-stop and encoder inputs, and toggle H-bridge enable lines. The 4 MHz instruction rate is sufficient for trapezoidal-velocity profiling at step rates up to ~10 kHz, and OTP memory locks the velocity tables to prevent field tampering in OEM motor-control products.
Được đề xuất
Sensor Conditioning Firmware
The PIC16C65AT-04I/PT is widely used in multi-channel sensor signal-conditioning boards that read thermocouples, RTDs, load cells, and 4-20 mA loops via external analog front-ends. The PIC16C65A does not have on-chip ADC, so an external ADC such as MCP3202/MCP3204 is paired via SPI, with the MCU performing linearization, cold-junction compensation, and digital filtering. 7KB program memory holds full IEEE 754 floating-point thermocouple tables in lookup form, while 192 bytes of SRAM provides working buffer for moving-average and median filters. Industrial temp grade ensures stable readings across plant environments.
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Legacy Embedded Migration
The PIC16C65AT-04I/PT is a target for products migrating from earlier PIC16C5X or PIC16C6X designs where the PIC16 mid-range architecture, register file, and 14-bit instruction set are preserved while gaining larger memory and more I/O. The PIC16C65A shares the same core instruction set, peripheral library naming, and configuration-bit semantics as the entire PIC16 mid-range family, allowing engineers to re-target MPASM or XC8 source files with minimal rewrites. With 7KB of OTP memory, it gives a moderate code-size upgrade over PIC16C55/PIC16C57 while keeping the OTP cost advantage of high-volume production runs.
Được đề xuất
Lighting Control Systems
In DMX-512 or DALI lighting fixtures and architectural dimmer panels, the PIC16C65AT-04I/PT acts as the protocol decoder and PWM generator, leveraging its USART for DMX reception and its CCP/PWM channels plus Timer0/Timer2 for triac-fired or MOSFET-driven dimming. 33 I/O can drive multi-channel RGBW LED drivers via shift-register expanders, support rotary encoder input for manual dim/preset selection, and toggle relays for scene switching. OTP memory secures the fixture personality from field modification, which is a hard requirement in many entertainment-lighting installations. Industrial temp grade survives stage-lighting rack ambient conditions.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C65AT-04I/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 | PIC16C65AT-04E/PT | PIC16C65A-04I/PT | PIC16C65A-20I/PT | PIC16C65A-20E/PT | PIC16C65A-04/PQ |
|---|---|---|---|---|---|---|
| Package | 44-TQFP (PT) | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-TQFP (PT) - same | 44-MQFP (PQ) - same footprint family |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 20 MHz | 4 MHz |
| Program Memory | 7KB OTP | 7KB OTP | 7KB OTP | 7KB OTP | 7KB OTP | 7KB OTP |
| Operating Temperature | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +85C (industrial) | -40C to +85C (industrial) | -40C to +125C (extended) | -40C to +85C (industrial) |
| Number of I/O | 33 | 33 | 33 | 33 | 33 | 33 |
| Packaging | Tape & Reel | Tape & Reel | Tray | Tray | Tray | Tray |
| Approx Unit Price (qty 100) | USD 5.40 | USD 6.10 (extended temp premium) | USD 5.20 | USD 5.80 (20 MHz premium) | USD 6.40 | USD 5.30 |
| Family / Silicon Revision | PIC16C65A (Rev. A) | PIC16C65A (Rev. A) | PIC16C65A (Rev. A) | PIC16C65A (Rev. A) | PIC16C65A (Rev. A) | PIC16C65A (Rev. A) |
Bảo phân biệt quan trọng
- Industrial -40C to +85C temperature grade for factory-floor and outdoor enclosures (vsPIC16C65A-04E/PT)
- Tape-and-reel packaging for high-volume SMT assembly (vsPIC16C65A-04I/PT (tray))
- Lower-frequency 4 MHz bin optimizes oscillator stability for cost-sensitive designs (vsPIC16C65A-20I/PT (20 MHz grade))
Ghi chú thiết kế
The PIC16C65AT-04I/PT draws a few mA in active mode and falls to the microampere range in Sleep; the Vdd range of 4.0 V to 6.0 V is narrower than Flash PIC16F parts. Place a 100 nF ceramic decoupling capacitor close to each Vdd pin (pins 20, 30, 40) and a single 10 uF bulk electrolytic or tantalum cap on the main 5 V rail to suppress switching transients from relay or triac loads sharing the same supply. The MCU has no internal brown-out reset (BOR); add an external voltage supervisor such as MCP100-4.6V for safety-critical applications.
For the 44-pin TQFP (PT) footprint, follow Microchip recommended land pattern with 0.4 mm lead pitch and 0.3 mm pad width. Keep the ICSP clock/data lines (RB6/RB7) and MCLR trace short (less than 50 mm) to ensure reliable in-circuit programming via PICkit or ICD tools. Place the 4 MHz crystal or ceramic resonator within 10 mm of OSC1/OSC2 pins and route the OSC traces over a continuous ground pour to minimize EMI coupling into adjacent analog or timer-input traces.
OTP memory cannot be erased or rewritten once programmed; any firmware bug in the production OTP image is unrecoverable. Always develop and validate code on a windowed (JW) or Flash-equivalent part (e.g. PIC16F877A-I/PT) before committing firmware to the OTP PIC16C65AT-04I/PT for volume production. Watch configuration bits carefully: disabling the Watchdog Timer (WDT) for sleep-mode tests, selecting the correct oscillator mode (XT for 4 MHz crystal), and enabling the power-on timer (PWRT) are common sources of dead-on-arrival boards.
RB0 supports edge-triggered external interrupt; keep the RB0 trace short and routed away from the OSC1/OSC2 traces to avoid false interrupts from oscillator coupling. PORTE pins (RE0/RE1/RE2) double as control lines for a parallel slave port on the PIC16C65A; if not used for PSP operation, configure them as digital I/O in firmware to avoid floating inputs that consume extra supply current and can trigger spurious interrupt-on-change events on PORTB.
Thông tin tuân thủ
RoHS and lead-free per Microchip product-page declarations for the 44-TQFP (PT) OTP PIC16C6X family; verify lot-level RoHS certificate at order time. Not AEC-Q100 qualified; for AEC-Q100 designs, migrate to PIC16F or PIC18 automotive-graded siblings.