PIC16C64AT-20I/PQ - 8-Bit 20MHz OTP MCU, 3.5KB | Microchip
部品番号: PIC16C64AT-20I/PQ ✗ 生産終了| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $9.5 | $9.50 |
| 10 | $8.55 | $85.50 |
| 100 | $7.6 | $760.00 |
| 500 | $6.65 | $3,325.00 |
| 1,000 | $5.7 | $5,700.00 |
PIC16C64AT-20I/PQ 概要
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral interfaces onto one die. The PIC16CXX family is built on a fully-static CMOS architecture with a Harvard memory layout, meaning the program and data buses are physically separate. The C family is the classic OTP lineage that preceded the Flash-based F series; OTP parts are programmed once with a device programmer and cannot be electrically erased, which suits cost-sensitive production runs. Within the power-management IC hierarchy, this part sits at the controller/signal-processing tier alongside 8-bit microcontrollers from 8051, AVR, and HC11 families.
Key features include a 14-bit instruction set optimized for compact code, a hardware USART for asynchronous serial links, an 8-bit parallel slave port for bus expansion, and a programmable watchdog timer with its own on-chip RC oscillator for fail-safe operation. The 33 I/O pins are grouped into five ports (PORTA–PORTE), each capable of sourcing or sinking sufficient current to drive LEDs and small relays directly. Brown-out-reset circuitry holds the part in reset when VDD dips below a programmable threshold, preventing code corruption from indeterminate supply rails.
Architecture-wise, the PIC16C64A integrates an 8-level hardware stack for subroutine nesting, a 14-bit program counter that addresses the full 8K x 14 OTP space, and an interrupt controller handling up to 12 sources including external edge-triggered events. The core executes most instructions in a single 200 ns instruction cycle at 20 MHz, delivering roughly 5 MIPS of throughput. A 5-bit port-RA multiplexed analog comparator and two analog comparators further extend the analog front-end without external ICs.
Typical applications include industrial automation controllers, consumer-electronics user-interface boards, automotive body and convenience modules (with PIC16F variants recommended for new designs), appliance control panels, and remote sensor signal-conditioning front-ends. Designers continue to specify this OTP part where mature firmware is locked and per-unit cost is critical. A practical design consideration is the OTP memory: firmware must be fully validated, since field firmware updates are impossible. For new designs, consider the pin-compatible PIC16F877A (Flash) variant to gain in-circuit reprogrammability without changing the PCB layout.
ドロップイン代替品: PIC16C64AT-20I/PQ — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: PIC16C64AT-20I/PQ （同一形状・フットプリント） — 相違点: Timers, Package, Program Memory Size, Core Architecture, RoHS Status.
クイック比較ツール — 並列比較する代替部品を選択:
PIC16C64A-20I/PQ
✅ ドロップイン✓ 在庫あり
$12.2 / 個
データシートを見る →PIC16C64AT-20/PQ
✅ ドロップイン✓ 在庫あり
$4.45 / 個
データシートを見る →PIC16C64AT-20E/PQ
✅ ドロップイン✓ 在庫あり
$7.2 / 個
データシートを見る →PIC16C64A-20/PQ
✅ ドロップイン✓ 在庫あり
$5.2 / 個
データシートを見る →PIC16C64AT-20I/PQ 最大定格＆電気的特性
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC16CXX |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 x 8 bytes |
| 最大クロック周波数 | 20 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Supply Voltage (VDD) | 4 V to 6 V |
| I/O Pins | 33 programmable |
| Serial Interfaces | I2C, SPI, USART |
| Timers | Timer0, Timer1, Timer2 + WDT |
| パッケージ | 44-pin MQFP (10x10 mm) |
| 実装タイプ | Surface Mount |
| 動作温度 | -40 °C to +85 °C (Industrial) |
| Temperature Grade | Industrial (I) |
| RoHS ステータス | ROHS3 Compliant |
PIC16C64AT-20I/PQ ピン構成
| ピン 1 | OSC1/CLKIN — Oscillator crystal input or external clock input |
| ピン 2 | OSC2/CLKOUT — Oscillator crystal output; CLKOUT when in RC mode |
| ピン 3 | MCLR/VPP — Master Clear reset / programming voltage input |
| ピン 4 | RA0 — PORTA bit 0 (analog comparator input) |
| ピン 5 | RA1 — PORTA bit 1 (analog comparator input) |
| ピン 6 | RA2 — PORTA bit 2 (analog comparator input) |
| ピン 7 | RA3 — PORTA bit 3 (analog comparator input) |
| ピン 8 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| ピン 9 | RA5/SS — PORTA bit 5 / SPI slave select |
| ピン 10 | VSS — Ground reference |
| ピン 11 | VDD — Positive supply (4-6 V) |
| ピン 12 | RB0/INT — PORTB bit 0 / external interrupt |
| ピン 13 | RB1 — PORTB bit 1 |
| ピン 14 | RB2 — PORTB bit 2 |
| ピン 15 | RB3 — PORTB bit 3 |
| ピン 16 | RB4 — PORTB bit 4 (interrupt-on-change) |
| ピン 17 | RB5 — PORTB bit 5 (interrupt-on-change) |
| ピン 18 | RB6/PGC — PORTB bit 6 / ICSP clock |
| ピン 19 | RB7/PGD — PORTB bit 7 / ICSP data |
| ピン 20 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator/counter |
| ピン 21 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| ピン 22 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| ピン 23 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| ピン 24 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| ピン 25 | RC5/SDO — PORTC bit 5 / SPI data out |
| ピン 26 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| ピン 27 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| ピン 28 | VSS — Ground reference |
| ピン 29 | VDD — Positive supply (4-6 V) |
| ピン 30 | RD0 — PORTD bit 0 |
| ピン 31 | RD1 — PORTD bit 1 |
| ピン 32 | RD2 — PORTD bit 2 |
| ピン 33 | RD3 — PORTD bit 3 |
| ピン 34 | RD4 — PORTD bit 4 |
| ピン 35 | RD5 — PORTD bit 5 |
| ピン 36 | RD6 — PORTD bit 6 |
| ピン 37 | RD7 — PORTD bit 7 |
| ピン 38 | VSS — Ground reference |
| ピン 39 | VDD — Positive supply (4-6 V) |
| ピン 40 | RE0/RD — PORTE bit 0 / parallel slave port read |
| ピン 41 | RE1/WR — PORTE bit 1 / parallel slave port write |
| ピン 42 | RE2/CS — PORTE bit 2 / parallel slave port chip select |
| ピン 43 | VSS — Ground reference |
| ピン 44 | VDD — Positive supply (4-6 V) |
主な用途
PIC16C64AT-20I/PQ の用途: 7 件s: Industrial Automation Controller, Consumer Electronics User Interface, Appliance Control Panel, Remote Sensor Signal Conditioning, Automotive Body and Convenience Modules, Security and Alarm System Controller, Educational and Hobbyist Development.
Industrial Automation Controller
The PIC16C64AT-20I/PQ's 20 MHz core, 33 I/O pins, and 3.5 KB OTP program memory make it well suited for industrial automation controllers driving relays, optocouplers, and small signal-conditioning front-ends. Its 4–6 V supply range tolerates the noisy 5 V rails typical of factory-floor environments, and the integrated brown-out reset holds the part safely during supply dips. The 128 bytes of RAM are sufficient for typical PLC-style ladder logic replacement, while the hardware USART handles RS-485 communication with industrial sensors. The 44-MQFP package suits compact control boards mounted in DIN-rail enclosures, and the on-chip MSSP enables I2C/SPI communication with sensor arrays and EEPROM storage.
おすすめ
Consumer Electronics User Interface
The PIC16C64AT-20I/PQ drives consumer-electronics front-panel user interfaces with its 33 I/O pins capable of sourcing/sinking 25 mA per pin to drive LEDs and small relays directly. The 20 MHz clock delivers smooth multiplexing of 8-digit 7-segment displays, while the MSSP peripherals handle I2C communication with key-scan expanders and SPI control of LCD modules. The OTP memory suits mature, locked-firmware products where per-unit cost dominates, and the 44-MQFP package fits beneath the display stack. The integrated analog comparators enable touch-button sensing without external ICs, reducing BOM cost for high-volume consumer goods.
おすすめ
Appliance Control Panel
The PIC16C64AT-20I/PQ is a strong fit for appliance control panels — washing machines, microwave ovens, and dishwasher user interfaces — where the locked-firmware OTP memory and low per-unit cost are key advantages. Its 5 MIPS throughput handles simultaneous button scanning, LED/PWM indicator driving, and sensor polling with headroom. The hardware USART connects to motor-control boards via a simple UART protocol, while the integrated timers generate the precise PWM signals needed for variable-speed drives. The 44-MQFP footprint is compatible with the panel's compact PCB, and the industrial -40 °C to +85 °C rating covers kitchen and laundry environments.
おすすめ
Remote Sensor Signal Conditioning
The PIC16C64AT-20I/PQ's on-chip analog comparators and MSSP peripherals enable it to condition and transmit data from remote sensor front-ends over SPI or I2C buses. The 20 MHz clock allows fast sampling of pulsed sensor outputs (e.g., ultrasonic or IR receivers), while the 33 I/O pins route multiplexed analog inputs to the comparators without external switching. Brown-out-reset circuitry prevents corrupted sensor data during supply transients on long cable runs. The OTP memory locks calibrated sensor algorithms permanently, preventing field tampering in metrology applications. Industrial temperature rating supports outdoor and unconditioned enclosures.
おすすめ
Automotive Body and Convenience Modules
Although the standard 'I' (industrial) grade of PIC16C64AT-20I/PQ covers body electronics only, the extended 'E' (-40 °C to +125 °C) variant — PIC16C64A-20E/PQ — qualifies for automotive body modules such as window lifters, mirror controllers, and seat-position memory. The 44-MQFP footprint with 33 I/O pins handles H-bridge drivers and switch-matrix scanning, and the USART links to the vehicle CAN/LIN gateway via external transceivers. The OTP memory locks validated firmware against unauthorized modification. Designers targeting new automotive designs should select AEC-Q100-qualified Flash parts, but legacy designs continue to deploy this part successfully.
おすすめ
Security and Alarm System Controller
The PIC16C64AT-20I/PQ is well suited as the main controller in wired security and alarm panels, where its 33 I/O pins accommodate multiple zone inputs, siren outputs, keypad scanning, and dialer interfaces. The MSSP enables I2C communication with keypad/display peripherals while the USART drives a modem or wireless module. Brown-out reset ensures the panel reboots cleanly after power outages, and the watchdog timer recovers from firmware lockups. The OTP memory prevents field tampering with validated alarm logic, and the industrial -40 °C to +85 °C range tolerates unheated garages and outdoor equipment closets.
おすすめ
Educational and Hobbyist Development
The PIC16C64AT-20I/PQ remains a popular part in university embedded-systems curricula and hobbyist projects because of its mature toolchain support, abundant reference code, and forgiving 5 V supply range. The 44-MQFP package is breadboard-friendly when paired with a TQFP-to-DIP breakout adapter, exposing 33 I/O pins for student projects ranging from line-following robots to home automation. The MSSP, USART, and timer peripherals cover the full PIC16 peripheral set taught in introductory courses, and the OTP memory mirrors industry practice of locked-firmware production. Legacy PICkit and ICD programmers support this part for educational labs.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: PIC16C64AT-20I/PQ — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | PIC16C64A-20I/PQ | PIC16C64AT-20/PQ | PIC16C64AT-20E/PQ | PIC16C64A-20/PQ |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-MQFP (10x10) | 44-MQFP (10x10) - same | 44-MQFP (10x10) - same | 44-MQFP (10x10) - same | 44-MQFP (10x10) - same |
| Program Memory | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) | 3.5 KB OTP (2K x 14) |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Temperature | -40 °C to +85 °C (Industrial) | -40 °C to +85 °C (Industrial) | 0 °C to +70 °C (Commercial) | -40 °C to +125 °C (Extended) | 0 °C to +70 °C (Commercial) |
| RAM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND |
主な差別化要因
- Industrial temperature grade (-40 °C to +85 °C) （vs PIC16C64AT-20/PQ)
- Industrial vs extended temperature range （vs PIC16C64AT-20E/PQ)
- Mature ecosystem and abundant documentation （vs ATmega329V-8MI)
設計ノート
The PIC16C64AT-20I/PQ operates from 4 V to 6 V VDD; design the supply rail with a low-ESR 100 nF ceramic decoupling capacitor placed within 5 mm of each VDD/VSS pin pair. According to the Microchip datasheet, the device draws approximately 5 mA at 5 V/20 MHz; for low-power applications enable the SLEEP instruction and wake via Watchdog Timer or external interrupt. Brown-out-reset should be enabled (BOREN configuration bit) to guarantee clean reset during power dips.
The 44-MQFP package uses 0.8 mm pitch gull-wing leads — keep-out zone for traces should be designed for 0.5 mm clearance beneath the package body and 0.3 mm between pads. Place a ground pour under the IC body to reduce EMI coupling into analog comparator inputs on PORTA. The MCLR/VPP pin requires a 10 kΩ pull-up to VDD; do not leave it floating. ICSP clock (PGC, pin 18) and data (PGD, pin 19) should be brought out to a programming header for in-circuit programming.
Do not assume OTP memory can be erased or rewritten — the PIC16C64A is One-Time-Programmable and any programming error (e.g., bad configuration bits or code bug) renders the part unusable. Validate firmware on PIC16F or PIC18 equivalents in development, then port to PIC16C64A only after lock-down. Watchdog timer must be enabled (configuration WDTE bit) for fail-safe recovery from firmware lockups. The USART pins (RC6/RC7) are shared with PORTB; do not toggle these pins without disabling the USART peripheral.
Route the 20 MHz crystal traces (OSC1, OSC2) short and symmetric, with a ground guard trace on both sides to prevent coupling into PORTA analog comparator inputs. Place the crystal within 5 mm of the IC pins, and avoid routing signal traces under the crystal traces. For EMC-sensitive designs, add a ferrite bead on VDD and a 1 nF X7R bypass on each PORTA analog input to filter high-frequency noise from switched-mode supplies nearby.
コンプライアンス情報
ROHS3 compliant per distributor listings. Not AEC-Q100 qualified — for automotive applications choose the PIC16C64A-20E/PQ extended-temperature variant or a Flash-based PIC18F/Kinetis equivalent.
