PIC16C65B-20I/P - 8-Bit 20MHz OTP MCU, 7KB EPROM, 40-PDIP | Microchip
N.º da peça: PIC16C65B-20I/P ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $8.4 | $8,40 |
| 10 | $7.56 | $75,60 |
| 100 | $6.72 | $672,00 |
| 500 | $6.05 | $3.025,00 |
| 1.000 | $5.42 | $5.420,00 |
PIC16C65B-20I/P Visão geral
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripheral interfaces on one die, forming the lowest tier of the embedded computing hierarchy (microcontroller -> embedded processor -> microprocessor -> computing platform). The PIC16CXX mid-range architecture uses a 14-bit instruction word with a RISC-style 35-instruction set, providing deterministic timing and code density advantages over CISC alternatives. OTP memory allows one-time field programming, which is well suited to mature production runs where code revision is no longer expected.
Key features of the PIC16C65B include two 8-bit timers plus one 16-bit timer, a USART for asynchronous/synchronous serial communication, an MSSP module supporting both SPI and I2C, an 8-bit parallel slave port, and a watchdog timer with its own on-chip RC oscillator for maximum reliability. Compared with its predecessor PIC16C65A, the B revision improves oscillator stability and adds enhanced in-circuit serial programming support per Microchip's compatibility chart.
The PIC16C65B-20I/P's 200 ns instruction execution combined with its 33 I/O pins makes it suited to industrial control panels, instrumentation front-ends, motor control driver boards, and embedded sensor hubs where deterministic interrupt latency and code simplicity outweigh the need for large RAM or in-system reprogrammability. Its wide 4.0-5.5 V supply window tolerates noisy industrial 5 V rails.
When designing with this part, note that OTP cannot be reprogrammed - firmware bugs cannot be patched after programming, so plan for code verification prior to volume programming. Use the MPLAB PM3 Universal Device Programmer or MPLAB ICD in-circuit debugger during development before committing to OTP. An external resonator or crystal with appropriate load capacitors is required for accurate clocking.
Alternativas drop-in para PIC16C65B-20I/P — 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 PIC16C65B-20I/P (mesmo formato e footprint) — diferindo em Package, Timers, Program Memory Size, Core Architecture, Mounting Type.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C65A-20I/P
✅ Drop-In✓ Em estoque
$6.08 / unidade
Ver ficha técnica →PIC16C65B-04I/P
✅ Drop-In✓ Em estoque
$3.75 / unidade
Ver ficha técnica →PIC16C65B-04/PQ
✅ Drop-In✓ Em estoque
$10.25 / unidade
Ver ficha técnica →PIC16C65B-04I/PQ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$5.45 / unidade
Ver ficha técnica →PIC16C65AT-20I/P
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
PIC16C65A-04I/P
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$5.25 / unidade
Ver ficha técnica →PIC16C65B-04E/P
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$5.45 / unidade
Ver ficha técnica →PIC16C65A-20I/PQ
✅ Drop-In ⚠️ Especificações não verificadas✓ Em estoque
$8.62 / unidade
Ver ficha técnica →PIC16C65B-20I/P Classificações máximas e características elétricas
| Core Architecture | PIC16CXX mid-range 8-bit RISC |
| Program Memory (EPROM) | 7 KB (4K x 14-bit) |
| RAM | 192 bytes |
| Data EEPROM | 0 bytes (not present) |
| Maximum Clock Speed | 20 MHz |
| Instruction Execution Time | 200 ns (single cycle) |
| Instruction Set Size | 35 instructions (14-bit word) |
| Supply Voltage (Vdd) | 4.0 V to 5.5 V |
| Temperatura de operação | -40 C to +85 C (Industrial) |
| I/O Pins | 33 |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Serial Interfaces | USART, SPI (MSSP), I2C (MSSP) |
| Parallel Slave Port | Yes (8-bit PSP) |
| Watchdog Timer | Yes (with dedicated on-chip RC) |
| Encapsulamento | 40-pin PDIP (through-hole, 0.600 in) |
| Program Memory Type | OTP (One-Time Programmable) EPROM |
| Supply Current (typical) | 15 uA at 5 V/4 MHz; 1 uA at 3 V/32 kHz |
| Tipo de montagem | Through-Hole (DIP) |
| Status RoHS | Compliant |
Configuração de pinos do PIC16C65B-20I/P
| Pino 1 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pino 2 | RA0/AN0 — PORTA bit 0 (digital I/O) |
| Pino 3 | RA1/AN1 — PORTA bit 1 (digital I/O) |
| Pino 4 | RA2/AN2 — PORTA bit 2 (digital I/O) |
| Pino 5 | RA3/AN3/VREF — PORTA bit 3 / VREF (digital I/O) |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input (digital I/O) |
| Pino 7 | RA5/SS/AN4 — PORTA bit 5 / SPI Slave Select (digital I/O) |
| Pino 8 | OSC1/CLKIN — Oscillator input / external clock |
| Pino 9 | OSC2/CLKOUT — Oscillator output |
| Pino 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 I/O (digital I/O) |
| Pino 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 Osc / CCP2 (digital I/O) |
| Pino 12 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 (digital I/O) |
| Pino 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock (digital I/O) |
| Pino 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data (digital I/O) |
| Pino 15 | RC5/SDO — PORTC bit 5 / SPI data out (digital I/O) |
| Pino 16 | RC6/TX/CK — PORTC bit 6 / USART TX / clock (digital I/O) |
| Pino 17 | RC7/RX/DT — PORTC bit 7 / USART RX / data (digital I/O) |
| Pino 18 | VSS — Ground reference |
| Pino 19 | VDD — Positive supply (4.0-5.5 V) |
| Pino 20 | RB0/INT — PORTB bit 0 / external interrupt (digital I/O) |
| Pino 21 | RB1 — PORTB bit 1 (digital I/O) |
| Pino 22 | RB2 — PORTB bit 2 (digital I/O) |
| Pino 23 | RB3 — PORTB bit 3 (digital I/O) |
| Pino 24 | RB4 — PORTB bit 4 (digital I/O) |
| Pino 25 | RB5 — PORTB bit 5 (digital I/O) |
| Pino 26 | RB6/PGC — PORTB bit 6 / ICSP clock (digital I/O) |
| Pino 27 | RB7/PGD — PORTB bit 7 / ICSP data (digital I/O) |
| Pino 28 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 (digital I/O) |
| Pino 29 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 (digital I/O) |
| Pino 30 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 (digital I/O) |
| Pino 31 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 (digital I/O) |
| Pino 32 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 (digital I/O) |
| Pino 33 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 (digital I/O) |
| Pino 34 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 (digital I/O) |
| Pino 35 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 (digital I/O) |
| Pino 36 | RE0/RD — PORTE bit 0 / PSP read control (digital I/O) |
| Pino 37 | RE1/WR — PORTE bit 1 / PSP write control (digital I/O) |
| Pino 38 | RE2/CS — PORTE bit 2 / PSP chip select (digital I/O) |
| Pino 39 | VSS — Ground reference |
| Pino 40 | VDD — Positive supply (4.0-5.5 V) |
Aplicações típicas
PIC16C65B-20I/P é adequado para 7 aplicaçãos: Industrial Control Panels, Instrumentation Front-Ends, Motor Driver Controller Boards, Embedded Sensor Hubs, POS Terminal Peripherals, Security Keypads and Access Controllers, Automotive Aftermarket Modules.
Industrial Control Panels
The PIC16C65B-20I/P fits industrial control panels because its 33 I/O lines can directly drive relay coils, keypad matrices, and 7-segment LED displays without external multiplexing ICs. The 5 V supply tolerance handles the noisy 24 V-derived industrial bus, and the -40 C to +85 C industrial range covers cabinet environments. Its 200 ns deterministic interrupt latency ensures timely response to limit-switch and emergency-stop inputs. Compared to flash-based MCUs, OTP is acceptable because panel firmware is mature and rarely revised.
Recomendado
Instrumentation Front-Ends
In instrumentation front-ends, the PIC16C65B-20I/P serves as the system controller that drives LCD displays, scans keypads, and serializes measurement data via its USART to a host PC. The MSSP peripheral supports both SPI (for ADC/DAC chips) and I2C (for EEPROM/IO expanders), reducing external component count. Its 15 uA typical operating current at 4 MHz keeps heat dissipation negligible, important for precision analog front-ends where thermal gradients cause offset drift.
Recomendado
Motor Driver Controller Boards
The PIC16C65B-20I/P is well suited to stepper and brushed DC motor control boards where its 16-bit timer generates precise PWM carrier waveforms and the 8-bit timers handle encoder input capture. The parallel slave port allows high-bandwidth command injection from a host motion controller without burdening the USART. Its wide 4.0-5.5 V supply tolerates the inductive voltage transients from H-bridge switching when paired with proper snubbing. OTP is appropriate because motor-control firmware is version-locked at production.
Recomendado
Embedded Sensor Hubs
The PIC16C65B-20I/P aggregates multiple sensor inputs via I2C and SPI buses from external sensor ICs and repackages the data over its USART for transmission to a gateway or PLC. With 33 I/O and flexible peripheral mapping, it can simultaneously host a temperature sensor on I2C, an SPI pressure sensor, and several discrete switch inputs. The 1 uA sleep current at 32 kHz makes it practical for battery-backed sensor nodes that wake periodically to scan and report.
Recomendado
POS Terminal Peripherals
Point-of-sale peripherals such as receipt printer controllers, magnetic-stripe readers, and barcode scanner interfaces leverage the PIC16C65B-20I/P's combination of USART, SPI, and parallel slave port to bridge multiple IO types. The 200 ns instruction execution supports the real-time bit-banging often needed for legacy peripherals, and the wide operating voltage handles power-rail transients in shared electrical environments. Its 5 V logic is directly compatible with many older POS peripheral interfaces.
Recomendado
Security Keypads and Access Controllers
The PIC16C65B-20I/P powers standalone security keypads and access controllers where deterministic scan timing, low standby current, and long-term Microchip supply are valued. Its 33 I/O easily handles a 4x4 matrix keypad plus relay/buzzer outputs, while the USART enables logging to a central controller. The OTP memory prevents malicious firmware tampering after deployment - a security advantage over flash parts that can be rep-attacked. Industrial temperature range supports outdoor or unheated enclosures.
Recomendado
Automotive Aftermarket Modules
Although not AEC-Q100 qualified, the PIC16C65B-20I/P has historically been used in non-safety automotive aftermarket modules such as alarm systems, remote-start controllers, and dashboard accessories. Its wide 4.0-5.5 V supply tolerates 12 V battery transients when properly regulated, and the USART supports OBD-II diagnostic communication. For OEM automotive designs, AEC-Q100-qualified PIC18F variants are mandatory; this part suits hobbyist and retrofit applications only.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C65B-20I/P — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C65A-20I/P | PIC16C65B-04I/P | PIC16C65B-04/P | PIC16C65AT-20I/P |
|---|---|---|---|---|---|
| Package | PDIP-40 | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same | PDIP-40 - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Program Memory | 7 KB (4K x 14) OTP EPROM | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same | 7 KB OTP EPROM - same |
| Maximum Clock Speed | 20 MHz | 20 MHz - same | 4 MHz (-80%) | 4 MHz (-80%) | 20 MHz - same |
| Instruction Cycle | 200 ns | 200 ns - same | 1000 ns | 1000 ns | 200 ns - same |
| RAM | 192 bytes | 192 bytes - same | 192 bytes - same | 192 bytes - same | 192 bytes - same |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C - same | -40 C to +85 C - same | 0 C to +70 C (Commercial) | -40 C to +85 C - same |
| I/O Pins | 33 | 33 - same | 33 - same | 33 - same | 33 - same |
| Lifecycle Status | Active | Active | Active | Active | Active |
Principais diferenciais
- Wide 5 V industrial tolerance without LDO (vs PIC16C65A-20I/P)
- 33 I/O in 40-pin PDIP for direct legacy interface (vs PIC16C65B-04I/P)
- 5x faster than -04 speed grade at same price tier (vs PIC16C65B-04/P)
- Industrial temperature grade with same specs as commercial (vs PIC16C65B-04I/PQ)
Notas de projeto
OTP (One-Time Programmable) EPROM cannot be erased or reprogrammed. A single bit error in your firmware forces scrap of the programmed device. Use a JW (windowed) ceramic package variant or an F-series flash equivalent (PIC16F77-I/P) during development and validation. Verify all firmware via MPLAB X simulation, hardware emulation with PICkit 3, and full regression testing before committing any PIC16C65B-20I/P to a programmer socket. Estimated cost impact: a single OTP mis-program can waste $5-8 in parts alone.
Place a 100 nF decoupling capacitor as close as possible to each VDD pin (pins 19 and 40), with a wide ground trace back to VSS (pins 18 and 39). For the 40-pin PDIP, both VDD/VSS pairs MUST be decoupled - the PIC16CXX core draws brief high-current spikes during instruction execution. A bulk 10 uF tantalum or ceramic capacitor on the main 5 V rail near the IC provides additional high-frequency energy storage. Keep the MCLR/VPP trace short and route it away from high-current switching nodes.
The OSC1/OSC2 crystal oscillator traces must be kept short (under 10 mm) and routed symmetrically to maintain duty cycle. Place load capacitors (typically 15-33 pF for a 20 MHz crystal) immediately adjacent to the oscillator pins, with their ground returns tied directly to the nearest VSS pin rather than a shared ground bus. For noisy environments, add a 100 ohm series resistor at OSC2 output to dampen overdrive. Failure to follow these guidelines can cause oscillator start-up failure or excessive EMI.
The PIC16C65B-20I/P operates from 4.0 V to 5.5 V. For designs deriving power from a 12 V or 24 V industrial bus, use a low-dropout linear regulator (e.g., Microchip MCP1700) or a small switching regulator with adequate filtering. The MCU itself draws only 15 uA typical at 5 V/4 MHz, but I/O drive current peaks during port transitions can reach 25 mA per pin (100 mA total per port) - size your regulator and traces accordingly. Estimated: 33 I/O x 4 mA average = 132 mA peak port current in worst-case simultaneous switching scenarios.
The Parallel Slave Port (PORTD + PORTE) operates as an 8-bit bus and is sensitive to reflections on traces longer than 50 mm. For long bus connections, add 33 ohm series damping resistors near the MCU pins, especially on the RD0-RD7 data lines. The PSP is rated for read/write rates up to the system clock divided by 2, but signal integrity typically limits practical cable length to under 200 mm without additional buffering. Use HC/HCT-series bus buffers (e.g., 74HCT245) for off-board expansion.
Informações de conformidade
Per Microchip product page. Industrial temperature grade but NOT AEC-Q100 qualified - use PIC18F or dsPIC AEC-Q100 variants for automotive OEM designs. Lead-free PDIP package is RoHS compliant. REACH compliance per Microchip declaration.
