PIC16C65BT-20I/L - 8-Bit 20MHz 7KB OTP MCU | Microchip | PLCC-44
Référence : PIC16C65BT-20I/L ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $8.95 | $8,95 |
| 10 | $8.2 | $82,00 |
| 100 | $7.45 | $745,00 |
| 500 | $6.8 | $3 400,00 |
| 1 000 | $6.2 | $6 200,00 |
PIC16C65BT-20I/L Présentation
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripheral interfaces onto one silicon die. The 8-bit class targets simple deterministic control tasks with low BOM cost and minimal code footprint; within that class the PIC16C family adds RISC Harvard architecture (separate program and data buses), 14-bit wide instruction words, and a mid-range peripheral set. The 'C' suffix specifically denotes one-time-programmable (OTP) EPROM program memory, distinguishing this part from flash-based 'F' variants. This positions the PIC16C65BT-20I/L in the legacy industrial-control MCU segment where OTP, ruggedness, and long-life-cycle support matter more than in-system reprogrammability.
Key differentiating specifications include 20 MHz clock speed with a 200 ns instruction cycle, 7 KB (4K x 14) OTP program memory organized as 8K x 8 bytes, 192 bytes of RAM, 33 I/O pins, 8-channel 8-bit ADC, and an operating voltage range of 2.5 V to 6.0 V. The integrated peripherals comprise two 8-bit timers, one 16-bit timer, two CCP modules, a USART, and an MSSP (I²C/SPI) port, providing sufficient connectivity for typical industrial sensor and actuator interfaces.
Architecturally, the device uses a Harvard-style CPU with a hardware accumulator, W register, and 8-level deep stack; peripheral interrupts are vectored with single-context save/restore. CMOS fully-static design allows the clock to be stopped without losing register contents, enabling low-power sleep modes. The 8-bit ADC shares input pins with general-purpose I/O and supports both single-ended and differential conversions. The internal RC oscillator and wide operating-voltage range support both battery-backed and line-powered deployments.
Typical applications include industrial process-control front ends, motor-driver interface boards, building automation controllers, sensor hubs with UART/I²C peripherals, security and access-control panels, and legacy embedded-system upgrades where pin-compatible PIC16C65B replacements are required. The 33 I/O count and 20 MHz throughput also support small HMI panels and serial-bridge gateways.
When designing with this device, note that OTP memory cannot be re-programmed in-circuit; production programming must use a parallel programmer with the OTP window covered. For prototyping or field-updatable designs, migrate to the PIC16F877A-I/L or PIC16F887 family which share the same 44-PLCC pinout but use flash memory.
This page synthesizes real-time distributor pricing, parametric drop-in alternatives, and practical engineering design notes not available on a single manufacturer datasheet - a useful engineering starting point for sourcing the PIC16C65BT-20I/L or planning a like-for-like replacement.
Alternatives de remplacement direct pour PIC16C65BT-20I/L — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16C65BT-20I/L (même facteur de forme et même empreinte) — différant par Core Architecture, Program Memory Size, Serial Interfaces, Mounting Type, Operating Temperature.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16C65BT-04I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.1 / unité
Voir la fiche technique →PIC16C65B-20I/P
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$5.42 / unité
Voir la fiche technique →PIC16C65B-04I/P
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$3.75 / unité
Voir la fiche technique →PIC16C65AT-04I/PT
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$4.5 / unité
Voir la fiche technique →PIC16C64A-20I/L
✅ Remplacement direct ⚠️ Spécifications non vérifiées✓ En stock
$3.1 / unité
Voir la fiche technique →PIC16F877A-I/L
✅ Remplacement direct✓ En stock
$7.12 / unité
Voir la fiche technique →PIC16C65BT-20I/L Valeurs maximales et caractéristiques électriques
| Manufacturer | Microchip Technology |
| Series | PIC16CXX Mid-Range |
| Core Processor | PIC |
| Core Size | 8-bit |
| Fréquence d'horloge maximale | 20 MHz |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 192 bytes |
| Data EEPROM Size | Not present (OTP family) |
| Number of I/O Pins | 33 |
| Number of Timers | 3 (Timer0 8-bit, Timer1 16-bit, Timer2 8-bit) |
| Number of CCP Modules | 2 |
| ADC | 8-channel, 8-bit |
| Serial Interfaces | USART, MSSP (I2C/SPI) |
| Tension d'alimentation | 2.5 V to 6.0 V |
| Température de fonctionnement | -40 °C to +85 °C (Industrial) |
| Boîtier / Format | 44-PLCC (16.59 x 16.59 mm, J-Lead) |
| Type de montage | Surface Mount |
| Program Memory Type | OTP EPROM |
Configuration des broches de PIC16C65BT-20I/L
| Broche 1 | MCLR/VPP — Master clear (reset) input / programming voltage |
| Broche 2 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Broche 3 | RA1/AN1 — PORTA bit 1 / analog input 1 |
| Broche 4 | RA2/AN2 — PORTA bit 2 / analog input 2 |
| Broche 5 | RA3/AN3/VREF+ — PORTA bit 3 / analog input 3 / ADC positive reference |
| Broche 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Broche 7 | RA5/AN4/SS — PORTA bit 5 / analog input 4 / SPI slave select |
| Broche 8 | RE0/RD/AN5 — PORTE bit 0 / read control / analog input 5 |
| Broche 9 | RE1/WR/AN6 — PORTE bit 1 / write control / analog input 6 |
| Broche 10 | RE2/CS/AN7 — PORTE bit 2 / chip select / analog input 7 |
| Broche 11 | VDD — Positive supply voltage (2.5 V to 6.0 V) |
| Broche 12 | VSS — Ground reference |
| Broche 13 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Broche 14 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Broche 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Broche 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Broche 17 | RC2/CCP1 — PORTC bit 2 / CCP1 |
| Broche 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Broche 19 | RD0/PSP0 — PORTD bit 0 / parallel slave port bit 0 |
| Broche 20 | RD1/PSP1 — PORTD bit 1 / parallel slave port bit 1 |
| Broche 21 | RD2/PSP2 — PORTD bit 2 / parallel slave port bit 2 |
| Broche 22 | RD3/PSP3 — PORTD bit 3 / parallel slave port bit 3 |
| Broche 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Broche 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Broche 25 | RC6/TX/CK — PORTC bit 6 / USART transmit / USART clock |
| Broche 26 | RC7/RX/DT — PORTC bit 7 / USART receive / USART data |
| Broche 27 | RD4/PSP4 — PORTD bit 4 / parallel slave port bit 4 |
| Broche 28 | RD5/PSP5 — PORTD bit 5 / parallel slave port bit 5 |
| Broche 29 | RD6/PSP6 — PORTD bit 6 / parallel slave port bit 6 |
| Broche 30 | RD7/PSP7 — PORTD bit 7 / parallel slave port bit 7 |
| Broche 31 | VSS — Ground reference (second VSS pin) |
| Broche 32 | VDD — Positive supply voltage (second VDD pin) |
| Broche 33 | RB0/INT — PORTB bit 0 / external interrupt input |
| Broche 34 | RB1 — PORTB bit 1 |
| Broche 35 | RB2 — PORTB bit 2 |
| Broche 36 | RB3/PGM — PORTB bit 3 / low-voltage programming input |
| Broche 37 | RB4 — PORTB bit 4 |
| Broche 38 | RB5 — PORTB bit 5 |
| Broche 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Broche 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Broche 41 | VREF- — ADC negative reference voltage |
| Broche 42 | NC — Not connected (per datasheet) |
| Broche 43 | NC — Not connected (per datasheet) |
| Broche 44 | NC — Not connected (per datasheet) |
Applications typiques
PIC16C65BT-20I/L convient pour 7 applications: Industrial Process Control Front End, Motor Driver Interface Board, Building Automation Controller, Security and Access Control Panel, Sensor Hub with UART/I2C Peripherals, Legacy Embedded System Upgrade, Small HMI Panel Controller.
Industrial Process Control Front End
The PIC16C65BT-20I/L's 33 digital I/O pins, three counter/timers, and 8-channel 8-bit ADC make it well suited for industrial process-control front ends interfacing sensors (temperature, pressure, level) and actuators (relays, solenoids, valves). The 20 MHz core (200 ns instruction cycle) supports deterministic control loops up to a few kHz, while the USART and MSSP serial ports allow connection to industrial fieldbus bridges or HMIs. Industrial temperature grade (-40°C to +85°C) and OTP program memory (non-reprogrammable, immune to bit-flips) suit long-life factory-floor controllers where firmware is finalized at production. Compared with flash-based successors like the PIC16F877A-I/L, the C65BT offers higher production-line security at the cost of field upgradability.
Recommandé
Motor Driver Interface Board
The PIC16C65BT-20I/L's two CCP (Capture/Compare/PWM) modules and three timers enable brushless DC or stepper motor commutation logic, direction control, and PWM speed regulation. The 33 I/O pins accommodate Hall-effect sensor inputs, enable signals, fault flags, and encoder feedback from a single MCU. The 20 MHz instruction cycle provides sufficient bandwidth for trapezoidal commutation at typical small-motor RPM. OTP memory prevents accidental firmware corruption in electrically noisy motor environments. The 44-PLCC footprint is mechanically robust for chassis-mounted driver boards, and the USART provides a debug/command channel for factory tuning.
Recommandé
Building Automation Controller
The PIC16C65BT-20I/L fits mid-range building-automation controllers such as multi-zone HVAC thermostats, lighting panels, and access-control sub-controllers. The I2C/SPI MSSP port connects to environmental sensors and peripheral expanders, the USART links to a central BMS gateway, and the 33 I/O drive triac interfaces for AC loads. Operating voltage range (2.5 V to 6.0 V) supports 5 V regulated rails common in building-control panels. Industrial temperature grade accommodates mechanical rooms and unconditioned enclosures. OTP memory prevents unauthorized firmware rollback, an advantage for installed-building security applications.
Recommandé
Security and Access Control Panel
The PIC16C65BT-20I/L's combination of 33 I/O, USART, MSSP, and ADC is well matched to security panels integrating keypad inputs, magnetic-door sensors, PIR motion detectors, sirens, and relay-controlled locks. The 20 MHz throughput allows polling of multiple zones in real time without missed events. OTP memory provides tamper-resistance against firmware extraction - a security advantage in physical-access products. The wide 2.5 V to 6.0 V supply range supports battery-backed operation with brown-out-reset supervision. The 44-PLCC J-Lead package is mechanically rugged for through-hole-friendly chassis mount assemblies.
Recommandé
Sensor Hub with UART/I2C Peripherals
The PIC16C65BT-20I/L acts as a serial-bridge sensor hub aggregating I2C sensor data (temperature, humidity, accelerometers) and forwarding aggregated packets over UART to a host processor. The MSSP port supports both I2C master and SPI master modes, allowing flexible sensor selection. The 8-channel ADC adds analog-sensor support such as light sensors or 4-20 mA loops. With 192 bytes of RAM the hub manages small data buffers before forwarding to the host; for larger buffering an external I2C EEPROM or SRAM is required. The OTP non-reprogrammability prevents firmware tampering in unattended installations.
Recommandé
Legacy Embedded System Upgrade
The PIC16C65BT-20I/L is commonly used as a like-for-like replacement in legacy systems where the original PIC16C65B socket is empty and the firmware was developed for that core. The pin-compatible 44-PLCC J-Lead package allows direct drop-in without PCB modification, and the instruction set, register map, and peripheral configuration match the original PIC16C65B family. For new designs, Microchip recommends migrating to the PIC16F877A-I/L or PIC16F887-I/L, which share the same pinout but use flash memory for field upgradability. OTP memory is a deliberate choice when production runs are stable and long-life-cycle support outweighs the need for firmware updates.
Recommandé
Small HMI Panel Controller
The PIC16C65BT-20I/L can drive small character-LCD or simple graphic-LCD HMI panels via its MSSP (SPI) and parallel I/O. With 33 I/O, the MCU connects directly to a 4x4 keypad, a 16x2 or 20x4 character LCD, status LEDs, and a serial host link. The 20 MHz throughput is sufficient for screen refresh and key debounce without visible latency. OTP memory is acceptable when the HMI vocabulary is finalized at production. For multi-language or updatable HMI screens, the flash-based PIC16F877A-I/L provides the same peripheral set with field-reprogrammable memory.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16C65BT-20I/L — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16C65BT-04I/PT | PIC16C65B-20I/P | PIC16C65B-04I/P | PIC16C64A-20I/L | PIC16F877A-I/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| 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 | 44-PLCC (J-Lead) - same |
| Core | PIC 8-bit RISC | PIC 8-bit RISC | PIC 8-bit RISC | PIC 8-bit RISC | PIC 8-bit RISC | PIC 8-bit RISC |
| Maximum Clock Frequency | 20 MHz | 4 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 3.5 KB OTP (-50%) | 14 KB Flash (+100%) |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (field-updatable) |
| ADC Resolution | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit | 10-bit |
| Number of I/O | 33 | 33 | 33 | 33 | 33 | 33 |
| Temperature Grade | Industrial (-40C to +85C) | Industrial | Industrial | Industrial | Industrial | Industrial |
| Supply Voltage | 2.5 V to 6.0 V | 2.5 V to 6.0 V | 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 |
Principaux différenciateurs
- Higher maximum clock speed within the PIC16C65B family (vs PIC16C65BT-04I/PT)
- Field-reprogrammable flash memory as drop-in upgrade (vs PIC16F877A-I/L)
- Industrial temperature range in the 44-PLCC J-Lead package (vs PIC16C65B-20I/P)
Notes de conception
The PIC16C65BT-20I/L operates from 2.5 V to 6.0 V with both VDD pins (11 and 32) and both VSS pins (12 and 31) required to be connected for proper power distribution. Use a 100 nF ceramic decoupling capacitor as close as possible to each VDD/VSS pair, plus a 10 µF bulk capacitor on the main supply rail. Brown-out reset and power-on reset are supported internally, but for battery-backed applications add an external voltage supervisor such as the MCP130T to guarantee a clean reset when VDD falls below the BVDD threshold. Estimated: at 20 MHz and 5 V supply, typical IDD is approximately 10-15 mA depending on peripheral activity and I/O loading.
Do not attempt to reprogram the OTP EPROM in-circuit; the PIC16C65BT-20I/L can only be programmed once using a parallel programmer such as the Microchip PICSTART Plus or MPLAB PM3, and the OTP window must be covered after programming. Apply VPP (typically 13.0 V to 13.5 V) only to the MCLR/VPP pin during programming; leaving VPP active during normal operation will hold the device in reset. For prototyping or field-updatable designs, choose the PIC16F877A-I/L which supports ICSP over RB6/RB7 with no high-voltage requirement. Also verify the ICSP clock and data pins are not loaded by external circuitry during programming.
The 44-PLCC J-Lead package requires careful PCB layout: place the device on a plated-through-hole land pattern with J-lead footprints slightly wider than the SOIC equivalent to accommodate the curved leads, and ensure the keep-out around the package is at least 2 mm for hand-solder rework. Both VDD pins (11 and 32) and both VSS pins (12 and 31) must be connected, even if one pair appears redundant - this is critical for thermal and electrical balance. Place the decoupling capacitors within 3 mm of their respective VDD/VSS pins and route the oscillator traces (OSC1, OSC2) as short as possible with a ground guard ring to reduce EMI susceptibility.
Informations de conformité
RoHS/lead-free status not explicitly stated in the verified distributor data; check Microchip product page or datasheet 'marking' section for confirmation. AEC-Q100 not applicable - this is a general-purpose industrial MCU, not an automotive-qualified part. Conflict minerals compliance assumed per Microchip corporate policy.
