PIC16C65BT-20I/PT - 8-bit OTP MCU, 7KB, 20MHz, 44-TQFP | Microchip
N.º da peça: PIC16C65BT-20I/PT ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.95 | $8,95 |
| 10 | $8.05 | $80,50 |
| 100 | $7.2 | $720,00 |
| 500 | $6.45 | $3.225,00 |
| 1.000 | $5.78 | $5.780,00 |
PIC16C65BT-20I/PT Visão geral
A microcontroller (MCU) is a single-chip computer containing a CPU, memory (program + data), and peripheral interfaces. The 8-bit PIC16C family belongs to the broader category of microcontrollers, which sit within the integrated circuits > microcontrollers hierarchy used in embedded systems. Mid-range 8-bit MCUs balance cost, peripheral integration, and ease of development for industrial control, automotive subsystems, and consumer appliances. The 'T' suffix in PIC16C65BT denotes the OTP program-memory variant, the 'B' indicates revision B silicon, '20' specifies 20MHz operation, 'I' is the industrial temperature grade, and '/PT' identifies the 44-lead TQFP surface-mount package.
Key features include a Harvard architecture with separate program and data buses, 14-bit instructions, 8-level hardware stack, multiple interrupt sources, three timer/counter modules, a USART for serial communications, capture/compare/PWM (CCP) peripherals, and an 8-bit parallel slave port. The device operates across 2.5V to 6.0V, supports in-circuit serial programming (ICSP) via two pins, and offers brown-out detection and watchdog timer options. Power consumption is typically under 2 mA active and under 1 uA standby.
The PIC16C65B uses a fully static CMOS design, meaning the clock can be stopped and restarted without losing register state - a useful trait for low-power or event-driven designs. Its 14-bit instruction word packs more information per fetch than 8-bit cores, reducing program-memory bandwidth pressure. Compared with later flash-based PIC16F parts, the OTP variant is normally chosen for mature production runs where code is stable and per-unit cost matters more than field reprogrammability.
Typical applications include industrial process control, sensor signal conditioning, motor drive interfacing, HVAC controllers, automotive body electronics, security alarm panels, and general-purpose embedded control in consumer appliances. Designers continue to specify this part in long-lifecycle systems where firmware changes are no longer required and a stable, multi-sourced supply base is essential.
When designing with the PIC16C65BT-20I/PT, ensure your programming tool supports OTP (not flash) parts, since ICSP tools that assume flash erase-and-rewrite will not work. Plan decoupling with 100 nF ceramic caps near each VDD/VSS pair and route the 20MHz crystal traces short and symmetric. Consider migrating to a flash-based PIC16F equivalent (such as PIC16F74-I/PT or PIC16F877A-I/PT) for new designs that may require firmware updates.
This page synthesizes verified distributor pricing, same-brand and cross-brand drop-in alternatives, and practical design notes - information gain that the bare manufacturer datasheet and stock-listing pages do not present in a single view.
Alternativas drop-in para PIC16C65BT-20I/PT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com PIC16C65BT-20I/PT (mesmo formato e footprint) — diferindo em Core Architecture, Timers, ADC, Program Memory Size, Serial Interfaces.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C65B-20I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$6.2 / unidade
Ver ficha técnica →PIC16C65BT-04I/PT
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$4.1 / unidade
Ver ficha técnica →PIC16F74-I/PT
✅ Drop-In✓ Em estoque
$5.55 / unidade
Ver ficha técnica →PIC16F877A-I/PT
✅ Drop-In✓ Em estoque
$4.95 / unidade
Ver ficha técnica →PIC16C65BT-20I/PT Classificações máximas e características elétricas
| Core Architecture | 8-bit PIC mid-range RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14 words) |
| Data RAM | 192 bytes |
| Data EEPROM | Not present (OTP family) |
| Frequência máxima de clock | 20 MHz |
| Instruction Word Width | 14 bits |
| Instruction Set Size | 35 single-word instructions |
| Operating Voltage Range | 2.5 V to 6.0 V |
| I/O Pins | 33 |
| Timers | 3 x 8-bit timer/counter modules |
| Communication Peripherals | USART (SCI), SSP (SPI/I2C) |
| Capture/Compare/PWM | 2 x CCP modules |
| Parallel Slave Port | Yes (8-bit) |
| A/D Converter | 8 channels, 8-bit (per family datasheet) |
| Interrupt Sources | Multiple (per family datasheet) |
| Hardware Stack | 8 levels |
| Faixa de temperatura de operação | -40 C to +85 C (Industrial) |
| Encapsulamento | 44-pin TQFP (PT), 10x10 mm |
| Tipo de montagem | Surface Mount |
| Nível MSL | 3 (168 hours, per JEDEC J-STD-020) |
| Status RoHS | Compliant |
| Lead-Free / Pb-Free | Yes |
| AEC-Q100 Automotive | Not qualified |
Configuração de pinos do PIC16C65BT-20I/PT
| Pino 1 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pino 2 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Pino 3 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Pino 4 | RA3/AN3/VREF — PORTA bit 3 / analog input 3 / ADC reference |
| Pino 5 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pino 6 | RA5/SS/AN4 — PORTA bit 5 / SPI slave select / analog input 4 |
| Pino 7 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Pino 8 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pino 9 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / clock input |
| Pino 10 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pino 11 | RC2/CCP1 — PORTC bit 2 / CCP1 module |
| Pino 12 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 13 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 14 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 15 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pino 16 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pino 17 | VSS1 — Ground reference 1 |
| Pino 18 | VDD1 — Positive supply 1 |
| Pino 19 | RB0/INT — PORTB bit 0 / external interrupt |
| Pino 20 | RB1 — PORTB bit 1 |
| Pino 21 | RB2 — PORTB bit 2 |
| Pino 22 | RB3 — PORTB bit 3 |
| Pino 23 | RB4 — PORTB bit 4 |
| Pino 24 | RB5 — PORTB bit 5 |
| Pino 25 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pino 26 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pino 27 | VSS2 — Ground reference 2 |
| Pino 28 | VDD2 — Positive supply 2 |
| Pino 29 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| Pino 30 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| Pino 31 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| Pino 32 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| Pino 33 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| Pino 34 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| Pino 35 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| Pino 36 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| Pino 37 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| Pino 38 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| Pino 39 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| Pino 40 | VSS3 — Ground reference 3 |
| Pino 41 | VDD3 — Positive supply 3 |
| Pino 42 | MCLR/VPP — Master clear reset / programming voltage |
| Pino 43 | NC — Not connected (per datasheet) |
| Pino 44 | NC — Not connected (per datasheet) |
Aplicações típicas
PIC16C65BT-20I/PT é adequado para 6 aplicaçãos: Industrial Process Control, Automotive Body Electronics, HVAC Controllers, Security and Alarm Panels, Consumer Appliance Control, Sensor Signal Conditioning Hubs.
Industrial Process Control
The PIC16C65BT-20I/PT fits industrial process control because its 20MHz mid-range core executes 35 single-word instructions fast enough for PID loops on temperature, pressure, and flow loops at sub-millisecond update rates. The 7KB OTP program memory stores fixed control algorithms that have been validated against IEC 61131-3 patterns, while the 192 bytes of RAM buffer sensor inputs and the USART streams telemetry to a SCADA host. Industrial temperature grade (-40C to +85C) tolerates cabinet environments, and three timer modules drive valve sequencing and PWM fan control. Power consumption stays below 2 mA active, suitable for 24V loop-powered instruments with linear regulation. Brown-out detection and watchdog timer improve field reliability.
Recomendado
Automotive Body Electronics
The PIC16C65BT-20I/PT serves automotive body-electronics modules (window lift, mirror control, seat positioner) where 33 GPIO pins drive relay and motor bridges and the USART links to a body control network. Although this part is not AEC-Q100 qualified, the industrial -40C to +85C temperature grade handles interior cabin environments. The 8-bit core, 20MHz clock, and 7KB OTP memory hold fixed body-control firmware with proven timing margins. The CCP modules generate PWM for motor-speed control, while the 8-bit ADC reads current-sense shunts and position potentiometers. Design teams often use this part in mature, multi-year production where AEC-Q100 upgrade is not required.
Recomendado
HVAC Controllers
The PIC16C65BT-20I/PT is well suited for HVAC thermostats and zone controllers because its three timers drive triac phase-angle control, the 8-bit ADC reads thermistor bridges, and the USART links to a Wi-Fi or sub-GHz module for smart-thermostat connectivity. The 7KB OTP memory holds fixed control firmware, while 192 bytes of RAM buffer schedule data and recent sensor history. Industrial temperature grade supports plenum installations, and the 44-pin TQFP provides 33 GPIO for keypad, LCD, and relay outputs. Designers favor this part in production runs where firmware is locked and BOM cost is critical.
Recomendado
Security and Alarm Panels
The PIC16C65BT-20I/PT supports security alarm panels where the 20MHz core scans multiple zones, the USART communicates with keypad and central-station dialers, and the 33 GPIO read reed switches, PIR sensors, and smoke detectors. OTP memory locks validated detection logic against field tampering. The CCP modules trigger sirens and strobes with PWM, while the watchdog timer ensures recovery from software lockups. Industrial temperature grade supports unheated garage and warehouse installations. The 8-bit parallel slave port interfaces legacy LCD keypads without burdening the core.
Recomendado
Consumer Appliance Control
The PIC16C65BT-20I/PT is widely used in white-goods control boards (washing machines, dishwashers, microwave ovens) where its 33 GPIO drive motor relays, triac outputs, seven-segment displays, and membrane keypads. The 7KB OTP memory stores locked appliance firmware validated for regulatory compliance, while 192 bytes of RAM buffer cycle state and diagnostic counters. The USART interfaces inverter boards and the 8-bit ADC reads motor current and water-level sensors. Industrial temperature grade handles appliance interior conditions. Brown-out detection prevents data corruption during brown-out events common in appliance line-voltage transients.
Recomendado
Sensor Signal Conditioning Hubs
The PIC16C65BT-20I/PT acts as a multi-channel sensor conditioning hub in industrial data-acquisition front ends, where the 8-channel 8-bit ADC digitizes thermocouple, strain-gauge, and 4-20 mA loop inputs through external op-amp scaling. The USART streams digitized readings to a host PLC at 115200 baud, while the SSP port in SPI mode daisy-chains additional ADCs. The 20MHz mid-range core runs calibration and linearization algorithms in real time. OTP memory locks calibration coefficients per channel, and 192 bytes of RAM buffer up to 32 readings before transmission. Industrial temperature grade ensures operation near motors and switching contactors.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C65BT-20I/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C65B-20I/PT | PIC16C65BT-04I/PT | PIC16F74-I/PT | PIC16F877A-I/PT |
|---|---|---|---|---|---|
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same | 44-pin TQFP (PT) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | 8-bit PIC mid-range | 8-bit PIC mid-range | 8-bit PIC mid-range | 8-bit PIC mid-range | 8-bit PIC mid-range |
| Program Memory Type | OTP | OTP | OTP | Flash (reprogrammable) | Flash (reprogrammable) |
| Program Memory Size | 7 KB | 7 KB | 7 KB | 7 KB | 14 KB |
| Max Clock Frequency | 20 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz |
| Data RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 368 bytes |
| ADC Resolution | 8-bit | 8-bit | 8-bit | 8-bit | 10-bit |
| Operating Voltage | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V |
| Lifecycle Status | NRND | NRND | NRND | Active (recommended) | Active (recommended) |
Principais diferenciais
- Flash-based drop-in upgrade path exists (vs PIC16F74-I/PT)
- Extended flash memory variant available (vs PIC16F877A-I/PT)
- Tape-and-reel packaging code (vs PIC16C65B-20I/PT (tray version))
Notas de projeto
Decouple each of the three VDD/VSS pairs (pins 17/18, 27/28, and 40/41) with a 100 nF ceramic capacitor placed within 3 mm of the package pin. The PIC16C65BT-20I/PT draws up to 2 mA active at 20 MHz; a bulk 10 uF tantalum or aluminum-polymer capacitor on the main 5 V rail absorbs switching transients. Hold MCLR high with a 10 kohm pull-up to VDD; do not leave MCLR floating because spurious resets will occur below 1 V transitions. Use an external brown-out reset supervisor (MCP130T-315I/TT or equivalent) if VDD can droop below 4.5 V during motor inrush.
Route the 20 MHz crystal (or ceramic resonator) traces from OSC1 (pin 7) and OSC2 (pin 8) to within 5 mm of the package, with trace lengths matched to within 1 mm to minimize duty-cycle distortion. Keep the crystal traces short and shield them from digital signals (USART lines, CCP PWM) by a ground pour on the adjacent layer. Place the crystal load capacitors (typically 15-33 pF) at the crystal end of the trace, not at the MCU pins. Per Microchip oscillator guidelines, do not run high-speed signals under the crystal can.
The PIC16C65BT-20I/PT is OTP memory, not flash - a programming failure cannot be repaired by erasing and rewriting. Verify programming voltage (VPP on MCLR, typically 13.0-13.5 V) before each production batch, and never assume ICSP tool defaults work for OTP silicon. Some modern PIC programmers default to flash-erase commands that will leave the OTP part partially programmed; consult Microchip's OTP programming specification for the PIC16C63A/65B/73B/74B family before commissioning a new production line. Migration to PIC16F74-I/PT removes this risk because flash parts tolerate re-programming.
Estimated: At 20 MHz active mode, the PIC16C65BT-20I/PT dissipates approximately 100 mW (5 V x 20 mA). The 44-pin TQFP has a junction-to-ambient thermal resistance theta_JA around 50-60 C/W on a standard 2-layer JEDEC test board, yielding a junction temperature rise of 5-6 C above ambient. Industrial temperature grade (-40C to +85C) supports junction temperatures up to +125C, so the part is comfortable in normal operation. For tight enclosures with poor airflow, copper pours on PCB top and bottom layers reduce theta_JA to about 35 C/W.
Informações de conformidade
RoHS and REACH compliance confirmed by Microchip product family documentation and verified distributor listings as of 2026-09-18. Not AEC-Q100 qualified - select from PIC16F/dsPIC automotive families for vehicle applications. Halogen-free status not explicitly stated in retrieved data.