PIC16C65BT-20E/L - 8-bit 20MHz 7KB OTP MCU | 44-PLCC | Microchip
MPN: PIC16C65BT-20E/L ✗ Cuối đờiPIC16C65BT-20E/L Tóm tắt
What is an 8-bit microcontroller? An 8-bit MCU is a single-chip computer that processes data in 8-bit words and integrates a CPU, program memory, data RAM, and peripheral set on one die. The PIC16C65BT-20E/L belongs to the PIC16CXX mid-range family (PIC16C65B subgroup), positioned as a low-cost, high-performance CMOS fully-static device that competes architecturally with the Intel 8051 and Motorola 68HC11, while offering a Harvard architecture and RISC instruction set for deterministic single-cycle execution on most instructions.
Key features include 33 digital I/O pins, three 8-bit timer/counters with optional prescalers, two Capture/Compare/PWM (CCP) modules, a 10-bit 8-channel Analog-to-Digital Converter, a synchronous serial port (SSP) supporting SPI and I2C master/slave modes, a USART with 9-bit address detect, and a parallel slave port for direct bus interface to external processors or memory. The brown-out reset (BOR) circuit and power-on reset (POR) ensure reliable startup across the full 4 V to 5.5 V supply window.
The PIC16C65B silicon implements a 14-bit wide instruction word with a 35-instruction set and a hardware 8-level deep stack, providing code density comparable to early ARM7TDMI for byte-oriented control tasks. Program memory is OTP (not flash or EEPROM), which means the firmware is permanently written by an EPROM programmer at production - this part is therefore best suited for mature, stable firmware in volume production rather than iterative prototyping.
Typical applications include industrial control panels, automotive body and chassis modules, point-of-sale terminals, uninterruptible power supply (UPS) controllers, and embedded sensor hubs where deterministic response time and long-term component availability outweigh the convenience of in-system reprogramming. The 'E' temperature grade (-40C to +125C) specifically enables under-hood automotive use and outdoor industrial installations.
When designing with the PIC16C65BT-20E/L, place a 0.1 uF decoupling capacitor within 5 mm of each VDD/VSS pair, use a 4 MHz to 20 MHz crystal or ceramic resonator with the internal oscillator block, and ensure the MCLR pin is pulled high through a 10 kohm resistor with a 100 nF cap to ground for clean device reset. The OTP memory window requires shaded UV erasure only if windowed packages are used; standard PLCC parts are one-time-programmable and cannot be erased electrically.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C65B family and PIC16F871 family, and practical design notes that are not aggregated in any single source - including a parameter-by-parameter comparison against the PIC16F871-E/L flash-based successor, the PIC16C74B-20E/L larger-memory variant, and the legacy PIC16C65B-20E/L industrial-grade part.
Bộ thay thế dễ dàng lắp đặt cho PIC16C65BT-20E/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-20E/L (cùng hình factor và footprint) — khác nhau ở Mounting Type, Package, Timers, Core Architecture, Data EEPROM.
PIC16C65B-20E/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F871-E/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16F877A-E/L
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →PIC16C74B-20E/L
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
PIC16C65BT-20E/L Tỷ lệ tối đa & tính chất điện
| Core Architecture | PIC16CXX mid-range, 8-bit RISC |
| Instruction Word Width | 14 bits |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14) |
| RAM | 192 x 8 bytes |
| Data EEPROM | Not present on this part |
| Maximum CPU Clock | 20 MHz |
| Supply Voltage (VDD) | 4 V to 5.5 V |
| I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| Timers | 3 x 8-bit (Timer0/Timer2 + WDT) with Timer1 as 16-bit |
| CCP Modules | 2 |
| Serial Interfaces | SSP (SPI / I2C), USART (with 9-bit address detect) |
| Parallel Slave Port | Yes (8-bit) |
| Hộp | 44-pin PLCC (J-Lead), 16.59 x 16.59 mm |
| Nhiệt độ hoạt động | -40C to +125C (Automotive grade, 'E' suffix) |
| Kiểu lắp đặt | Surface Mount |
| Trạng thái RoHS | Compliant (Pb-free per PLCC J-lead) |
| Terminal Form | J-Bend |
| Package Code (JEDEC) | QCCJ |
Cấu hình chân PIC16C65BT-20E/L
| Chân 1 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| Chân 2 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC positive voltage reference |
| Chân 3 | RA4/T0CKI — PORTA bit 4 (open-drain) / Timer0 clock input |
| Chân 4 | RA5/AN4/SS — PORTA bit 5 / Analog input channel 4 / SPI slave select |
| Chân 5 | RE0/RD/AN5 — PORTE bit 0 / Parallel Slave Port RD signal / Analog input channel 5 |
| Chân 6 | RE1/WR/AN6 — PORTE bit 1 / Parallel Slave Port WR signal / Analog input channel 6 |
| Chân 7 | RE2/CS/AN7 — PORTE bit 2 / Parallel Slave Port CS signal / Analog input channel 7 |
| Chân 8 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Chân 9 | OSC2/CLKOUT — Crystal oscillator output / clock output (Fosc/4) |
| Chân 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Chân 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture Compare PWM 2 |
| Chân 12 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| Chân 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Chân 14 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port data bit 0 |
| Chân 15 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port data bit 1 |
| Chân 16 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port data bit 2 |
| Chân 17 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port data bit 3 |
| Chân 18 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Chân 19 | RC5/SDO — PORTC bit 5 / SPI data out |
| Chân 20 | RC6/TX/CK — PORTC bit 6 / USART asynchronous transmit / USART synchronous clock |
| Chân 21 | RC7/RX/DT — PORTC bit 7 / USART asynchronous receive / USART synchronous data |
| Chân 22 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port data bit 4 |
| Chân 23 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port data bit 5 |
| Chân 24 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port data bit 6 |
| Chân 25 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port data bit 7 |
| Chân 26 | VSS — Ground reference |
| Chân 27 | VDD — Positive supply (4.0 V to 5.5 V) |
| Chân 28 | RB0/INT — PORTB bit 0 / External interrupt input |
| Chân 29 | RB1 — PORTB bit 1 |
| Chân 30 | RB2 — PORTB bit 2 |
| Chân 31 | RB3 — PORTB bit 3 |
| Chân 32 | RB4 — PORTB bit 4 |
| Chân 33 | RB5 — PORTB bit 5 |
| Chân 34 | RB6/PGC — PORTB bit 6 / In-circuit debugger clock (ICSP clock) |
| Chân 35 | RB7/PGD — PORTB bit 7 / In-circuit debugger data (ICSP data) |
| Chân 36 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Chân 37 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Chân 38 | NC — Not connected (per datasheet) |
| Chân 39 | NC — Not connected (per datasheet) |
| Chân 40 | NC — Not connected (per datasheet) |
| Chân 41 | NC — Not connected (per datasheet) |
| Chân 42 | NC — Not connected (per datasheet) |
| Chân 43 | MCLR/VPP — Master clear reset input (active low) / Programming voltage input |
| Chân 44 | NC — Not connected (per datasheet) |
Ứng dụng tiêu biểu
PIC16C65BT-20E/L phù hợp cho 6 Áp dụngs: Automotive Body Control Module, Industrial PLC and Process Controller, Uninterruptible Power Supply (UPS) Controller, Point-of-Sale (POS) Terminal, Outdoor Environmental Sensor Hub, Security Alarm Panel.
Automotive Body Control Module
The PIC16C65BT-20E/L fits automotive body control modules (BCMs) because of its -40C to +125C automotive temperature grade ('E' suffix), 33 digital I/O lines for driving lamp relays and switch inputs, and 7 KB OTP that holds the BCM fixed-function firmware for window lifters, mirror controls, and central locking. Its 8-channel 10-bit ADC reads multiplexed switch and potentiometer positions with 39 LSB full-scale resolution, while the USART with 9-bit address detect enables multi-drop LIN or proprietary body bus communication. Compared with flash-based PIC16F877A, the OTP memory prevents post-production firmware readback, which is a security advantage against cloning attacks in aftermarket automotive electronics. The 44-PLCC J-Lead package survives automotive under-dash vibration when socketed onto a pin header or soldered to a FR-4 PCB with through-hole staking.
Được đề xuất
Industrial PLC and Process Controller
For industrial PLCs and process controllers, the PIC16C65BT-20E/L offers the deterministic 200 ns single-cycle instruction timing required for PID loop execution at 20 MHz, 8-channel 10-bit ADC for analog sensor inputs (4-20 mA, 0-10V, RTD bridges), and two CCP modules for PWM-driven valve actuators or heater SSR control. The 7 KB OTP memory holds ladder-logic interpreter or compiled state-machine code without external flash. Brown-out reset at ~4.0 V and watchdog timer with on-chip RC oscillator provide the supervisory functions demanded by IEC 61131-2 industrial control standards. The 44-PLCC package allows socketed field replacement, simplifying maintenance contracts in factory automation systems.
Được đề xuất
Uninterruptible Power Supply (UPS) Controller
The PIC16C65BT-20E/L is well suited to UPS controller boards because it combines a fast 20 MHz core with 33 I/O lines for monitoring mains voltage, battery voltage, current shunts, and inverter drive signals. Its 8-channel 10-bit ADC samples battery voltage and load current with sufficient resolution for state-of-charge estimation, while the two CCP modules generate PWM signals for the inverter IGBT bridge. The OTP memory protects proprietary battery-management firmware from reverse engineering. Operating from 4.0-5.5 V with a simple 7805-derived auxiliary rail, the part tolerates the wide input voltage swings typical of UPS front-end PFC stages. The 44-PLCC package is preferred over QFP for industrial UPS designs because it is socketable, simplifying factory calibration.
Được đề xuất
Point-of-Sale (POS) Terminal
In POS terminal designs, the PIC16C65BT-20E/L handles keypad scanning, LCD backlight control, magnetic-stripe reader interface via USART, and thermal printer stepper motor drive via CCP PWM. Its 192-byte RAM accommodates the small transaction record buffer, and the 7 KB OTP holds the POS firmware with no need for external memory. The SSP peripheral supports I2C communication with EEPROM cash-drawer sensors and SPI to a contactless smartcard reader. The 44-PLCC package fits inside compact POS enclosures and the automotive temperature grade tolerates the heat buildup behind a continuously-running thermal print head.
Được đề xuất
Outdoor Environmental Sensor Hub
The PIC16C65BT-20E/L works in outdoor environmental sensor hubs because the -40C to +125C operating range handles direct sunlight and winter temperatures in unattended weather stations. Its 8-channel ADC reads temperature, humidity, soil moisture, and solar radiation sensors; the USART streams the measurements over RS-485 to a central logger; and the SSP supports I2C to a precision barometric pressure sensor. Sleep mode with watchdog timer draws <10 uA between samples, enabling multi-year battery life from a 3.6 V lithium thionyl chloride primary cell. The OTP memory is ideal for sealed IP67 enclosures where firmware updates are not feasible.
Được đề xuất
Security Alarm Panel
The PIC16C65BT-20E/L is well matched to security alarm panels because it provides 33 I/O lines for zone inputs (door, window, PIR motion detectors) and relay outputs (siren, dialer, keypad LEDs) without external I/O expanders. The OTP memory prevents attackers from reading the alarm logic to bypass it, a key security advantage over flash-based parts. Brown-out reset and watchdog timer ensure the panel recovers from supply glitches and software lockups. The 8-channel ADC reads battery voltage and line-voltage tamper loops. The automotive temperature grade tolerates equipment-room heat, and the 44-PLCC socketed design allows installers to swap a failed MCU in the field without re-soldering.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho PIC16C65BT-20E/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-20E/L | PIC16F871-E/L | PIC16F877A-E/L | PIC16C74B-20E/L |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin PLCC (J-Lead), 16.59 x 16.59 mm | 44-pin PLCC (J-Lead) - same | 44-pin PLCC (J-Lead) - same | 44-pin PLCC (J-Lead) - same | 44-pin PLCC (J-Lead) - same |
| Program Memory Type | 7 KB OTP (4K x 14) | 7 KB OTP (4K x 14) - same | 3.5 KB flash (-50%) | 14 KB flash (+100%) | 4 KB OTP (-43%) |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| RAM | 192 bytes | 192 bytes | 128 bytes | 368 bytes (+92%) | 192 bytes |
| Data EEPROM | Not present | Not present | 64 bytes | 256 bytes | Not present |
| In-Circuit Programming | No (OTP only) | No | Yes (ICSP) | Yes (ICSP) | No (OTP only) |
| Supply Voltage | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 2.0 V to 5.5 V | 2.0 V to 5.5 V | 4.0 V to 5.5 V |
| Operating Temperature | -40C to +125C (Automotive) | -40C to +125C (Automotive) | -40C to +125C (Automotive) | -40C to +125C (Automotive) | -40C to +125C (Automotive) |
| Lifecycle Status | NRND | NRND | Active | Active | NRND |
Bảo phân biệt quan trọng
- Automotive-grade -40C to +125C with OTP code security (vsPIC16F877A-E/L)
- Larger 7 KB OTP vs 3.5 KB flash in same PLCC-44 footprint (vsPIC16F871-E/L)
- Direct legacy migration from PIC16C65B predecessor family (vsPIC16C74B-20E/L)
Ghi chú thiết kế
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of each VDD/VSS pair (pins 11/12 and 31/32 on the 40-pin DIP; on the 44-PLCC the VDD/VSS pair is pin 27/26). Add a bulk 10 uF tantalum or aluminum polymer capacitor at the board input to handle transient current spikes when the ADC and CCP modules switch simultaneously. The PIC16C65BT-20E/L draws approximately 13 mA active at 20 MHz and 5 V; in Sleep mode with WDT disabled, current drops to less than 1 uA per Microchip datasheet DS30234D. Use an MCP1700 or equivalent low-Iq LDO if the design must operate from a 12 V or 24 V industrial supply rail.
Route the crystal traces (OSC1 pin 8, OSC2 pin 9) as short and symmetrical as possible, with the crystal placed within 10 mm of the MCU and a guard ring tied to ground around both traces to minimize EMI coupling. Keep high-speed CCP1 (pin 12) and CCP2 (pin 11) PWM traces away from the analog ADC inputs (RA0-RA5, RE0-RE2) to avoid digital switching noise coupling into the ADC conversion. The MCLR pin (pin 43) must have a 10 kohm pull-up to VDD and a 100 nF cap to ground placed within 5 mm of the pin to ensure clean device reset during power-up per Microchip application note AN587.
Do not assume OTP memory can be electrically erased - it cannot. Use a PIC16F877A-E/L prototype with flash memory to develop and debug firmware, then commit the final code to the PIC16C65BT-20E/L OTP for production. Verify the brown-out reset voltage (~4.0 V) is compatible with your supply - if operating near 4.5 V with significant ripple, the BOR may reset the MCU repeatedly. The I2C SSP peripheral requires external 4.7 kohm pull-ups on SDA and SCL because the PORTC open-drain mode must be selected in firmware; do not rely on internal weak pull-ups which are not strong enough for standard I2C bus speeds per Microchip PIC16 mid-range family reference manual.
Thông tin tuân thủ
RoHS compliant per Microchip product page (Pb-free terminal finish). The 'E' suffix designates the automotive -40C to +125C temperature grade rather than a formal AEC-Q100 qualification - automotive customers should request the specific PPAP documentation from Microchip for AEC-Q100 compliance verification. REACH compliant per EU regulation (EC) No 1907/2006 with no SVHC above 0.1% w/w threshold.
