PIC16C65BT-04/L - 8-Bit 4MHz MCU 7KB OTP 44-PLCC | Microchip
MPN: PIC16C65BT-04/L ✗ Cuối đờiPIC16C65BT-04/L Tóm tắt
An 8-bit PIC microcontroller is a RISC-class Harvard-architecture device that executes one instruction per cycle (except branches) from on-chip program memory, with separate program and data bus structures. The PIC16CXX family occupies the mid-range tier of Microchip's PIC portfolio (10/12/14/16/17/18-bit instruction widths), positioned above baseline PIC10/12/16 devices and below the high-end PIC17/18 series, and it serves as the ancestor lineage of today's enhanced mid-range PIC16F1xxx family.
Key features of the PIC16C65BT-04/L include 7KB OTP program memory (4K x 14 words), 192 bytes of data RAM, 33 I/O pins, hardware USART for UART, MSSP peripheral supporting SPI and I2C (master/slave), two 8-bit timers plus one 16-bit timer with capture/compare/PWM, a 5-channel 8-bit ADC, and a watchdog timer with on-chip RC oscillator. The CMOS fully-static design permits operation down to DC and supports a wide operating voltage of 2.5V to 5.5V.
The PIC16C65B architecture uses a 14-bit instruction word, two-stage pipeline, 8-level hardware stack, and direct/indirect addressing modes. Its peripheral set is integrated for embedded control, eliminating external logic and reducing BOM cost. Interrupt sources include external RB0/INT, port-B change, timer overflows, USART TX/RX, ADC completion, MSSP, and EEPROM write completion.
Typical applications include industrial control panels, sensor signal conditioning, motor-control front-ends, UART-connected sensor hubs, and legacy embedded systems. The device is widely used in HVAC controls, security alarm panels, vending machine controllers, automotive body electronics, and industrial automation where deterministic 8-bit performance with simple software development is required.
When designing with the PIC16C65BT-04/L, reserve MCLR with a proper RC or diode reset network, place a 0.1uF decoupling capacitor adjacent to each VDD pin, and ensure the oscillator traces are short and guarded by ground. OTP parts cannot be erased, so development should use a windowed PIC16C65B JW part or a Flash equivalent (such as PIC16F877) for prototyping.
This page synthesizes distributor pricing, drop-in alternatives drawn from Microchip's 44-PLCC pin-compatible PIC16C6x family, and practical design considerations not consolidated in the original manufacturer datasheet.
Bộ thay thế dễ dàng lắp đặt cho PIC16C65BT-04/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 PIC16C65BT-04/L (cùng hình factor và footprint) — khác nhau ở Mounting Type, ADC, Timers, Operating Temperature, Package.
PIC16C65B-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65B-04E/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65B-04/PQ
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F877-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F874-04I/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C65A-04I/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C65BT-04/L Tỷ lệ tối đa & tính chất điện
| Core | 8-bit PIC |
| Series | PIC16CXX (PIC16C6x mid-range family) |
| Tần số xung maksimum | 4 MHz (-04 speed grade) |
| Program Memory Size | 7 KB (4K x 14) OTP |
| RAM Size | 192 x 8 bytes |
| Data EEPROM | Not specified (no internal EEPROM on PIC16C65B) |
| Number of I/O Pins | 33 |
| Hộp | 44-pin PLCC (J-lead, 16.59 x 16.59 mm) |
| Điện áp cung cấp | 2.5 V to 5.5 V |
| Nhiệt độ hoạt động | -40 C to +85 C (industrial, T-suffix) |
| ADC | 5 channels, 8-bit |
| Timers | Two 8-bit (TMR0, TMR2) + one 16-bit (TMR1) with CCP |
| Communication Peripherals | USART (UART) + MSSP (SPI, I2C master/slave) |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Instruction Word Width | 14 bits |
| Kiểu lắp đặt | Surface Mount (PLCC socket or SMT) |
| Programming Method | OTP (One-Time Programmable, ICSP) |
Cấu hình chân PIC16C65BT-04/L
| Chân 1 | RA0/AN0 — Port-A bit 0 / ADC channel 0 |
| Chân 2 | RA1/AN1 — Port-A bit 1 / ADC channel 1 |
| Chân 3 | RA2/AN2 — Port-A bit 2 / ADC channel 2 |
| Chân 4 | RA3/AN3/VREF+ — Port-A bit 3 / ADC channel 3 / ADC reference voltage input |
| Chân 5 | RA4/T0CKI — Port-A bit 4 / Timer-0 external clock input |
| Chân 6 | RA5/AN4/SS — Port-A bit 5 / ADC channel 4 / SPI slave select |
| Chân 7 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Chân 8 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| Chân 9 | MCLR/VPP — Master clear reset (active-low) / programming voltage |
| Chân 10 | VSS — Ground reference |
| Chân 11 | VDD — Positive supply voltage (2.5 V to 5.5 V) |
| Chân 12 | RB0/INT — Port-B bit 0 / external interrupt input |
| Chân 13 | RB1 — Port-B bit 1 |
| Chân 14 | RB2 — Port-B bit 2 |
| Chân 15 | RB3/PGM — Port-B bit 3 / low-voltage ICSP programming clock |
| Chân 16 | RB4 — Port-B bit 4 (interrupt-on-change) |
| Chân 17 | RB5 — Port-B bit 5 (interrupt-on-change) |
| Chân 18 | RB6/PGC — Port-B bit 6 / ICSP serial clock (interrupt-on-change) |
| Chân 19 | RB7/PGD — Port-B bit 7 / ICSP serial data (interrupt-on-change) |
| Chân 20 | RC0/T1OSO/T1CKI — Port-C bit 0 / Timer-1 oscillator output / Timer-1 clock input |
| Chân 21 | RC1/T1OSI/CCP2 — Port-C bit 1 / Timer-1 oscillator input / CCP2 output |
| Chân 22 | RC2/CCP1 — Port-C bit 2 / CCP1 output |
| Chân 23 | RC3/SCK/SCL — Port-C bit 3 / MSSP SPI clock / I2C clock |
| Chân 24 | RC4/SDI/SDA — Port-C bit 4 / MSSP SPI data in / I2C data |
| Chân 25 | RC5/SDO — Port-C bit 5 / MSSP SPI data out |
| Chân 26 | RC6/TX/CK — Port-C bit 6 / USART TX / USART clock |
| Chân 27 | RC7/RX/DT — Port-C bit 7 / USART RX / USART data |
| Chân 28 | RD0 — Port-D bit 0 |
| Chân 29 | RD1 — Port-D bit 1 |
| Chân 30 | RD2 — Port-D bit 2 |
| Chân 31 | RD3 — Port-D bit 3 |
| Chân 32 | RD4 — Port-D bit 4 |
| Chân 33 | RD5 — Port-D bit 5 |
| Chân 34 | RD6 — Port-D bit 6 |
| Chân 35 | RD7 — Port-D bit 7 |
| Chân 36 | RE0/RD — Port-E bit 0 / parallel slave port read |
| Chân 37 | RE1/WR — Port-E bit 1 / parallel slave port write |
| Chân 38 | RE2/CS — Port-E bit 2 / parallel slave port chip select |
| Chân 39 | VSS — Ground reference |
| Chân 40 | VDD — Positive supply voltage |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | NC — Not connected (per datasheet) |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16C65BT-04/L phù hợp cho 6 Áp dụngs: Industrial Control Panels, HVAC Thermostat Controllers, Security Alarm Panels, Vending Machine Controllers, UART-Connected Sensor Hubs, Automotive Body Electronics.
Industrial Control Panels
The PIC16C65BT-04/L's 33 digital I/O lines, 5-channel 8-bit ADC, and USART fit directly into industrial control panel designs where multiple sensor inputs and actuator outputs must be coordinated. The 4 MHz instruction cycle yields 1 us deterministic timing for PID loop tasks, and the 192-byte RAM accommodates small state machines without external memory. Place the MCU between the 24V-to-5V regulator and the relay/solenoid drivers, with the USART carrying Modbus RTU traffic to a host PLC. Compared with a 16-bit MCU it offers far simpler toolchain and lower BOM cost.
Được đề xuất
HVAC Thermostat Controllers
Wall-mounted HVAC thermostats use the PIC16C65BT-04/L to read thermistor or temperature-sensor ADC channels, drive a triac-gated 24 VAC fan relay, and communicate over UART with a building automation bus. The 4 MHz clock is sufficient for 250 ms control loop and display refresh tasks, and the 33 I/O pins support LCD, keypad, and multiple relay outputs. The 44-PLCC package fits comfortably inside a wall-plate footprint and the -40 to +85 C rating covers plenum environments. Using a Flash sibling like the PIC16F877-I/L avoids OTP write-time delays during calibration.
Được đề xuất
Security Alarm Panels
Alarm panels integrate PIR sensors, door/window reed switches, sirens, and a PSTN or GSM dialer - all of which the PIC16C65BT-04/L can service through its 33 I/O and USART. The MSSP module drives an I2C EEPROM for event logging, while the CCP timer generates precise beep patterns for the piezo siren. The 7 KB OTP program memory accommodates the zone-scan state machine plus dialer firmware. Designed in the late 1990s and still shipped in security panels today, this MCU remains the canonical alarm-panel processor.
Được đề xuất
Vending Machine Controllers
Vending machines require multi-drop coin acceptor interfaces, bill validator pulse counters, dispenser motor drivers, and a multi-button keypad plus LCD display - all roles the PIC16C65BT-04/L handles with its 33 I/O and CCP modules. The MSSP supports SPI to an external shift register that drives the LCD segments, while the USART connects to a MDB peripheral bus. Operating from a 24 VDC bus down-regulated to 5 V, this MCU's 2.5 V to 5.5 V supply range tolerates regulator ripple typical of vending machine power supplies.
Được đề xuất
UART-Connected Sensor Hubs
Distributed sensor hubs aggregate analog and digital inputs from industrial equipment and forward them over RS-485 or RS-232 to a host controller. The PIC16C65BT-04/L's USART supports asynchronous 9-bit mode for RS-485 addressing, while the 5-channel 8-bit ADC handles thermocouple-amplified or pressure-transducer inputs. The MSSP can drive an I2C sensor frontend, freeing the main core to perform protocol framing. With 192 bytes RAM it can buffer a frame before Modbus transmission without external memory.
Được đề xuất
Automotive Body Electronics
Body controllers for window lifters, mirror adjusters, and seat positioners have used the PIC16C65BT-04/L since its introduction, taking advantage of the 33 I/O pins to drive multiple motor H-bridges and read Hall-effect position sensors. The 4 MHz clock generates PWM via the CCP module for soft-start window lifters. Operating from an automotive 12 V bus regulated to 5 V, the MCU must withstand load-dump transients - design with TVS protection and follow Microchip's automotive EMC guidelines. For new automotive programs, migrate to the AEC-Q100 qualified PIC16F877-I/L.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C65BT-04/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 | PIC16C65B-04I/L | PIC16C65B-04E/L | PIC16C65B-04/PQ | PIC16F877-04I/L | PIC16F874-04I/L | PIC16C65A-04I/L |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-PLCC (L) | 44-PLCC (L) - same | 44-PLCC (L) - same | 44-PLCC (PQ) - same | 44-PLCC (L) - same | 44-PLCC (L) - same | 44-PLCC (L) - same |
| Program Memory | 7 KB OTP | 7 KB OTP - same | 7 KB OTP - same | 7 KB OTP - same | 14 KB Flash (+100%) | 7 KB Flash (same) | 7 KB OTP - same |
| RAM | 192 B | 192 B - same | 192 B - same | 192 B - same | 368 B (+92%) | 192 B - same | 192 B - same |
| EEPROM | None (OTP) | None - same | None - same | None - same | 256 B internal | 256 B internal | None - same |
| Maximum Clock | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same |
| I/O Pins | 33 | 33 - same | 33 - same | 33 - same | 33 - same | 33 - same | 33 - same |
| Operating Temperature | -40 C to +85 C (industrial, T-suffix) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Lifecycle Status | Obsolete (last-time-buy) | Obsolete | Obsolete | Obsolete | Active | Active | Obsolete |
Bảo phân biệt quan trọng
- Silicon revision B silicon for the canonical PIC16C65B mid-range MCU (vsPIC16C65A-04I/L (revision A silicon))
- OTP-based 7 KB program memory for one-time programmable deployment (vsPIC16F877-04I/L (Flash memory))
- Industrial temperature range (-40 C to +85 C) with T-suffix designation (vsPIC16C65B-04/PQ (commercial 0 to +70 C))
Ghi chú thiết kế
Power the PIC16C65BT-04/L from a regulated 5 V (or 3.3 V) supply with at least 100 mA of headroom for I/O switching transients. Place a 0.1 uF decoupling capacitor within 5 mm of each VDD pin (pins 11 and 40) and a bulk 10 uF tantalum or aluminum cap on the supply rail. For battery applications, the brown-out reset (BOR) module must be enabled in the configuration word to prevent code corruption during supply droops below 2.5 V.
PIC16C65B is OTP - firmware is written once and cannot be erased or rewritten. Do not use OTP parts for development; use a JW (windowed) PIC16C65B or a Flash sibling such as PIC16F877 to iterate firmware. Failure to verify your firmware on a Flash equivalent first is a common cause of dead-on-arrival production boards. Always program the configuration word (oscillator, watchdog, BOR, code protection) before the application code to avoid an in-circuit reset loop.
Keep the oscillator traces (OSC1/OSC2) shorter than 10 mm and guard them with a ground pour. Place the 22 pF crystal loading capacitors within 5 mm of the OSC pins with symmetric trace lengths. The MCLR pin must have a 10 kohm pull-up to VDD and a 100 nF cap to ground for decoupling; do not leave MCLR floating or rely on the internal pull-up alone. ICSP pins PGC (RB6) and PGD (RB7) require series 10 kohm resistors near the MCU to isolate the programming tool from the application circuit.
Estimated: at 5 V VDD, 4 MHz clock, and typical I/O loading of 10 mA per pin (33 I/O x 10 mA = 330 mA max), worst-case dissipation is roughly (5 V x 0.330 A) = 1.65 W. The 44-PLCC has theta_JA around 45 C/W on a 1 oz copper 4-layer board, giving a 74 C junction rise above 25 C ambient - within the 125 C max but with margin for elevated ambient. Use wide VDD/VSS copper pours and at least 4 thermal vias under the PLCC die-attach pad to keep junction temperature below 100 C in enclosed industrial enclosures.
Thông tin tuân thủ
PIC16C65B family is a legacy OTP microcontroller introduced in the late 1990s. RoHS/REACH compliance status is not explicitly documented in the verified data. Lead-free and halogen-free status unknown. Not AEC-Q100 qualified - automotive designs should migrate to PIC16F877-I/L with appropriate automotive qualification. Verification against Microchip product environmental compliance page required.
