PIC16C64AT-20/L - 8-Bit 20MHz OTP MCU, 3.5KB | Microchip
MPN: PIC16C64AT-20/L ✗ Cuối đờiPIC16C64AT-20/L Tóm tắt
What is a PIC16C OTP microcontroller? A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces. The PIC16C family uses a Harvard-architecture RISC core that executes most instructions in a single clock cycle, making it well suited to real-time control. The “C” suffix denotes CMOS EPROM/OTP program memory - non-volatile, but write-once. Within the broader taxonomy, the PIC16C64A sits in this hierarchy: 8-bit MCU -> PIC16 family -> PIC16C6x sub-family -> PIC16C16C64A device -> OTP CMOS implementation.
Key features of the PIC16C64A include 33 I/O pins, three timer modules, a Capture/Compare/PWM (CCP) module, an 8-bit parallel slave port, and serial interfaces (SSP) that support both SPI and I²C. The device integrates power-on reset (POR), brown-out detect/reset (BOR), a watchdog timer (WDT) with its own on-chip RC oscillator, and a programmable code-protection fuse. Operating voltage spans 3.0 V to 5.5 V across the commercial 0 °C to +70 °C range, with industrial -40 °C to +85 °C variants available under different temperature suffixes.
Architecturally, the PIC16C64A uses a 14-bit instruction word and an 8-bit data path, allowing compact code density while keeping peripherals register-mapped. The 8-level hardware stack and 35-instruction set simplify assembly or C programming, and the CCP module provides PWM outputs for motor or LED control. The parallel slave port lets the device interface directly to an external 8-bit host bus, while the SSP peripheral supports both SPI and I²C master/slave modes.
Typical applications include industrial control panels, motor drive front-ends, embedded sensor hubs, and legacy upgrade / EOL replacement designs where a proven PIC16C6x footprint and toolchain are required. The PIC16C64AT-20/L is also widely used in educational and prototyping environments that target the PIC16C instruction set.
When designing with this part, verify that OTP programming is appropriate for the production volume - flashed (F-series) PIC16F variants are typically lower cost per unit and re-programmable. Confirm the 5V supply rail tolerance for analog peripherals and ensure the parallel slave port pin direction registers are correctly initialised in firmware.
This page synthesises distributor pricing, verified drop-in alternatives from the PIC16C6x family, and practical design notes that go beyond what the manufacturer datasheet alone provides.
Bộ thay thế dễ dàng lắp đặt cho PIC16C64AT-20/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 PIC16C64AT-20/L (cùng hình factor và footprint) — khác nhau ở Instruction Set, Operating Temperature, Package, Program Memory Size, Program Memory Type.
PIC16C64A-20/L
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C64A-20I/L
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →PIC16C64AT-20E/L
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C64AT-10/L
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C64AT-20/PT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C64AT-20/L Tỷ lệ tối đa & tính chất điện
| Family | PIC® 16C |
| Core | 8-bit RISC |
| Core Architecture | Harvard |
| Max CPU Frequency | 20 MHz |
| Instruction Set | 35 instructions, mostly single-cycle |
| Instruction Word | 14-bit |
| Program Memory Type | OTP (One-Time Programmable) CMOS |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| I/O Pins | 33 |
| Timers | 3 (Timer0, Timer1, Timer2) |
| CCP Modules | 1 (Capture/Compare/PWM) |
| Serial Interfaces | SSP (SPI / I²C) |
| Parallel Slave Port | Yes (8-bit) |
| Operating Voltage | 3.0 V to 5.5 V |
| Nhiệt độ hoạt động | 0 °C to +70 °C (commercial) |
| Brown-out Reset | Yes |
| Power-on Reset | Yes |
| Watchdog Timer | Yes (with dedicated on-chip RC) |
| Hộp | 44-pin PLCC (J-Lead), 16.59 mm x 16.59 mm |
| Kiểu lắp đặt | Surface Mount |
Cấu hình chân PIC16C64AT-20/L
| Chân 1 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / voltage reference + |
| Chân 2 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Chân 3 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Chân 4 | OSC1/CLKIN — Crystal oscillator input / external clock in |
| Chân 5 | OSC2/CLKOUT — Crystal oscillator output / clock out (Fosc/4) |
| Chân 6 | VSS — Ground reference |
| Chân 7 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| Chân 8 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 output |
| Chân 9 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 output |
| Chân 10 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I²C clock |
| Chân 11 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I²C data |
| Chân 12 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 13 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Chân 14 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Chân 15 | VSS — Ground reference |
| Chân 16 | VDD — Positive supply voltage |
| Chân 17 | RB0/INT — PORTB bit 0 / external interrupt input |
| Chân 18 | RB1 — PORTB bit 1 |
| Chân 19 | RB2 — PORTB bit 2 |
| Chân 20 | RB3 — PORTB bit 3 |
| Chân 21 | RB4 — PORTB bit 4 |
| Chân 22 | RB5 — PORTB bit 5 |
| Chân 23 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Chân 24 | RB7/PGD — PORTB bit 7 / ICSP data |
| Chân 25 | VSS — Ground reference |
| Chân 26 | VDD — Positive supply voltage |
| Chân 27 | RE0/RD/AN5 — PORTE bit 0 / parallel slave port read / analog input 5 |
| Chân 28 | RE1/WR/AN6 — PORTE bit 1 / parallel slave port write / analog input 6 |
| Chân 29 | RE2/CS/AN7 — PORTE bit 2 / parallel slave port chip select / analog input 7 |
| Chân 30 | VDD — Positive supply voltage |
| Chân 31 | VSS — Ground reference |
| Chân 32 | OSC1/CLKIN — Crystal oscillator input / external clock in (alternate) |
| Chân 33 | OSC2/CLKOUT — Crystal oscillator output / clock out (alternate) |
| Chân 34 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Chân 35 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Chân 36 | RA2/AN2/VREF- — PORTA bit 2 / analog input 2 / voltage reference - |
| Chân 37 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| Chân 38 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| Chân 39 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| Chân 40 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| Chân 41 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| Chân 42 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| Chân 43 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| Chân 44 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
Ứng dụng tiêu biểu
PIC16C64AT-20/L phù hợp cho 6 Áp dụngs: Industrial Control Panels, Motor Drive Front-Ends, Embedded Sensor Hubs, Legacy EOL Replacement / Field Retrofit, Educational and Prototyping Boards, White-Goods Appliance Control.
Industrial Control Panels
The PIC16C64AT-20/L is well matched to industrial control panels that need deterministic 8-bit control. With its 20 MHz CPU and 200 ns instruction cycle, the device can scan a 32-input keypad matrix and refresh a multiplexed 7-segment display inside a tight 5 ms loop without firmware timing headaches. The 33 I/O pins drive relay coils, optocouplers and status LEDs directly, while the on-chip Capture/Compare/PWM (CCP) module produces the timing signals for proportional valve control or heating-element PWM. Brown-out reset (BOR) and a hardware watchdog timer (WDT) reset the MCU after supply glitches or firmware lock-ups, which is essential on factory floors where 24 V DC supplies are common and noisy. The 44-pin PLCC socketed package simplifies field replacement, so service technicians can swap a failed MCU without re-soldering. Program memory is OTP at 3.5 KB, which is adequate for fixed-function ladder-replacement logic and short messaging protocols.
Được đề xuất
Motor Drive Front-Ends
Small brushed-DC and unipolar stepper motor controllers benefit from the PIC16C64AT-20/L’s on-chip CCP/PWM module and three timers. The 20 MHz instruction cycle produces PWM frequencies up to 78 kHz at 10-bit resolution (Fosc / 1024), which is more than enough bandwidth to drive MOSFET half-bridges without audible switching noise. The 33 digital I/O pins handle Hall-sensor inputs, end-stop switches, encoder feedback and direction logic, while the SSP peripheral supports I²C communication with companion sensors such as the Microchip MCP9808 thermal monitor or external EEPROMs. The PIC16C64A’s 128-byte RAM is sufficient for closed-loop PI control variables, and the 3.5 KB OTP program memory holds the entire state machine. Designers should add TVS diodes and a flyback structure across the motor terminals to protect the MCU from inductive kick-back on the I/O pins.
Được đề xuất
Embedded Sensor Hubs
The PIC16C64AT-20/L functions as a low-cost sensor hub that aggregates analogue signals and forwards them over SPI or I²C. The on-chip SSP block supports both master and slave modes at up to 400 kHz I²C (Fast-mode) and SPI at 5 MHz, which is sufficient for typical sensor networks. With 33 I/O and an internal 8-bit parallel slave port, the MCU can attach an external 8-bit ADC or share the bus with a host processor for data forwarding. Brown-out reset and power-on reset ensure deterministic startup, while the watchdog timer recovers from firmware stalls in unattended installations. The commercial 0 °C to +70 °C operating range covers most indoor monitoring applications such as HVAC duct sensing, smart-building telemetry and energy-meter pulse counting. For battery-powered nodes, designers can drop the CPU to 4 MHz to reduce active current; at that clock the PIC16C64A consumes only a few milliamps.
Được đề xuất
Legacy EOL Replacement / Field Retrofit
Many products in the field use PIC16C6x-family OTPs and now need an exact-form replacement. The PIC16C64AT-20/L in a 44-pin PLCC can be socketed into a legacy PCB without any layout change, restoring original firmware behaviour and avoiding re-certification cost. Its 8-bit RISC core, 35-instruction set and register file are identical to the original silicon, so legacy assembly code or compiled C code runs unchanged. Industrial-grade equivalents such as PIC16C64A-20I/L cover -40 °C to +85 °C and are drop-in when the original was an industrial grade. For long-term sustainability, designers can migrate firmware to a flash-based PIC16F877-20I/L in the same 44-pin PLCC footprint using the PICkit 3 ICD toolchain, then keep the original PIC16C64AT-20/L for spare-parts inventory until stock is exhausted.
Được đề xuất
Educational and Prototyping Boards
The PIC16C64AT-20/L is widely adopted in university curricula and DIY prototyping because the 44-pin PLCC package fits standard 44-pin PLCC sockets, making board swap-out trivial for student labs. With 33 I/O pins, three timers, an on-chip PWM and an SSP peripheral, the MCU covers the majority of undergraduate coursework topics - GPIO, timers, interrupts, PWM, SPI and I²C - using a single chip. The 3.5 KB OTP program memory forces students to write efficient code, while the 14-bit instruction word exposes them to the RISC paradigm. The PIC16C64AT-20/L’s commercial 0 °C to +70 °C range suits indoor lab benches and avoids the cost of industrial-grade parts. Many legacy PIC16C6x development kits - including the PICSTART Plus and original ICD units - target this part, so used tools and reference designs remain abundant on the second-hand market.
Được đề xuất
White-Goods Appliance Control
Washing machines, dishwashers and small kitchen appliances historically used the PIC16C6x family because of its deterministic real-time behaviour and on-chip peripherals. The PIC16C64AT-20/L delivers 20 MHz of compute for keypad scanning, water-level sensor reading, motor PWM control and triac-fired heater timing, all from a single MCU. Its CCP module produces the zero-crossing synchronised drive needed for triac-based heater or valve control, while the brown-out reset protects the MCU from mains-derived supply dips during compressor inrush. Program memory is OTP, which keeps per-unit cost low in high-volume white-goods production. Engineers designing new white-goods products today should evaluate the flash-based PIC16F877A-I/L, which is pin-compatible in 44-pin PLCC and supports in-circuit re-programming for late-stage firmware bug fixes during production.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C64AT-20/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 | PIC16C64A-20/L | PIC16C64A-20I/L | PIC16C64AT-20E/L | PIC16C64AT-10/L |
|---|---|---|---|---|---|
| Package | 44-PLCC (J-Lead), 16.59 x 16.59 mm | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same | 44-PLCC (J-Lead) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 10 MHz (-50%) |
| Program Memory | 3.5 KB (2K x 14) OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Operating Temperature | 0 °C to +70 °C (commercial) | 0 °C to +70 °C | -40 °C to +85 °C (industrial) | -40 °C to +85 °C (extended) | 0 °C to +70 °C |
| Packaging | Tape & Reel (T suffix) | Tray | Tray | Tape & Reel | Tape & Reel |
Bảo phân biệt quan trọng
- OTP-only memory for write-once security (vsPIC16F877-20I/L (flash-based))
- 44-pin PLCC socketed footprint for field-replaceable designs (vsPIC16F877-20I/P (40-pin PDIP))
- On-chip parallel slave port (PSP) for 8-bit host expansion (vsPIC16C62BT-20I/SO (28-pin SOIC))
Ghi chú thiết kế
Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of every VDD pin (the PIC16C64A has three VDD pins: 16, 26, 30 and one VSS: 15, 25, 31). Add a bulk 10 µF tantalum or aluminium-polymer cap near the IC for transient suppression. Brown-out reset (BOR) is enabled by configuration fuse - leaving it disabled can cause EEPROM corruption on noisy supplies.
PIC16C64AT-20/L is OTP - code is write-once. Verify the entire firmware image with the Microchip PICkit 3 and a UV-windowed PIC16C64A JW sample before committing to a production run. Confirm the configuration bits (oscillator, watchdog, code-protect, brown-out) match the schematic - a wrong WDT setting can lock the MCU in a reset loop with no debug visibility.
Route the crystal traces (OSC1/OSC2) as short, matched-length pairs and guard them with a GND keep-out zone to reduce EMI pickup. Place the 22 pF crystal-load capacitors close to the MCU pins, not near other high-frequency nets. If the parallel slave port is used, isolate the PORTD/PSP traces from PORTA/C/E to prevent bus contention during initialisation.
Thông tin tuân thủ
PIC16C64AT-20/L is an OTP legacy MCU marked NCNR (Not Recommended for New Designs). RoHS, REACH and lead-free status were not present in the verified distributor data set and are listed as 'unknown' rather than guessed; engineers should request the latest material declaration from Microchip before placing volume orders.
