PIC16LC77T-04I/PT - 8-bit MCU, 14KB OTP, 4MHz, 44-TQFP | Microchip
N.º da peça: PIC16LC77T-04I/PT ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.48 | $4,48 |
| 10 | $4.12 | $41,20 |
| 100 | $3.74 | $374,00 |
| 500 | $3.38 | $1.690,00 |
| 1.000 | $3.05 | $3.050,00 |
PIC16LC77T-04I/PT Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, memory (ROM/RAM), and peripherals on one die, optimized for embedded control tasks where deterministic behavior and low cost outweigh raw compute throughput. Within the broader taxonomy, microcontrollers belong to microcontrollers -> integrated circuits -> semiconductors. The PIC16LC77T family sits in Microchip's mid-range PIC16 architecture, which uses a 14-bit instruction word and Harvard bus structure to deliver predictable instruction timing at low clock rates. The LC variants specifically trade raw speed for reduced active and standby current, making them suited to battery-powered or thermally constrained designs.
Key features include 14KB of OTP program memory (not re-programmable in-circuit), 368 bytes of data RAM, 33 bidirectional I/O pins with 25 mA sink/source drive, an 8-channel 8-bit ADC, a USART module, an MSSP module supporting SPI and I2C, two 8-bit timers and one 16-bit timer, a watchdog timer, and brown-out reset. The PIC16C7X core executes most instructions in a single oscillator cycle, providing 4 MIPS at 4MHz, with a 200 ns instruction cycle for deterministic control loops. The 44-TQFP package exposes the full peripheral set, including external interrupt lines and the parallel slave port. The OTP memory allows factory or field one-time programming using Microchip's standard development tools, reducing per-unit cost versus flash-based equivalents.
Typical applications include industrial sensor conditioning, motor control front-ends, HVAC controllers, automotive body and chassis subsystems, consumer appliance interfaces, and white-goods control boards where a low pin-count, low-power 8-bit core is sufficient. The wide 2.5-6.0V supply range allows direct operation from unregulated 5V rails or battery stacks. The combination of OTP memory, on-chip ADC, and multiple serial interfaces lets the PIC16LC77T-04I/PT replace several discrete components in cost-sensitive embedded designs.
When designing with this device, allocate the 368-byte RAM budget carefully for stack and scratchpad use, since PIC mid-range devices share RAM between general-purpose storage and special-function registers. Decouple VDD with a 100 nF ceramic capacitor placed within 5 mm of the supply pin, and route the MCLR pin through the recommended resistor-capacitor reset network. Note that OTP memory cannot be rewritten - use the windowed (UV-erasable) PIC16C77 variants or the flash-based PIC16F877 for prototyping.
Alternativas drop-in para PIC16LC77T-04I/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 PIC16LC77T-04I/PT (mesmo formato e footprint) — diferindo em ADC, Core Architecture, Package, Timers, Operating Temperature.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16LC77T-04/PT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16LC77-04I/PT
✅ Drop-In✓ Em estoque
$4.39 / unidade
Ver ficha técnica →PIC16LC77T-04I/PQ
✅ Drop-In✓ Em estoque
$7.15 / unidade
Ver ficha técnica →PIC16F877-04I/PT
✅ Drop-In✓ Em estoque
$4.95 / unidade
Ver ficha técnica →PIC16F877A-I/PT
✅ Drop-In✓ Em estoque
$4.95 / unidade
Ver ficha técnica →PIC16LC74BT-04I/PQ
✅ Drop-In✓ Em estoque
$10.5 / unidade
Ver ficha técnica →PIC16LC77T-04I/PT Classificações máximas e características elétricas
| Product Family | PIC® 16C |
| Core Architecture | 8-bit RISC (PIC16 mid-range) |
| Program Memory Size | 14 KB (8K x 14) OTP |
| RAM Size | 368 x 8 bytes |
| Frequência máxima de clock | 4 MHz |
| Instruction Cycle | 200 ns (4 MIPS at 4 MHz) |
| Number of I/O Pins | 33 |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Faixa de temperatura de operação | -40 °C to +85 °C (Industrial) |
| Communication Interfaces | I2C, SPI, UART/USART |
| ADC | 8-channel, 8-bit (per PIC16C7X family) |
| Timers | 2 x 8-bit + 1 x 16-bit + WDT |
| Encapsulamento / Caixa | 44-TQFP (10 x 10 mm) |
| Tipo de montagem | Surface Mount |
| Packaging | Tape & Reel |
| I/O Sink/Source Current | 25 mA / 25 mA |
Configuração de pinos do PIC16LC77T-04I/PT
| Pino 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Pino 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pino 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pino 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Pino 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input 3 / ADC VREF+ |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pino 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI Slave Select |
| Pino 8 | RE0/RD/AN5 — PORTE bit 0 / Parallel Port Read / Analog input 5 |
| Pino 9 | RE1/WR/AN6 — PORTE bit 1 / Parallel Port Write / Analog input 6 |
| Pino 10 | RE2/CS/AN7 — PORTE bit 2 / Parallel Port Chip Select / Analog input 7 |
| Pino 11 | VDD — Positive supply voltage (2.5-6.0 V) |
| Pino 12 | VSS — Ground reference |
| Pino 13 | OSC1/CLKIN — Oscillator input / External clock input |
| Pino 14 | OSC2/CLKOUT — Oscillator output / Clock output |
| Pino 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pino 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pino 17 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pino 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pino 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| Pino 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| Pino 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| Pino 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| Pino 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pino 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pino 25 | RC6/TX/CK — PORTC bit 6 / USART async transmit / sync clock |
| Pino 26 | RC7/RX/DT — PORTC bit 7 / USART async receive / sync data |
| Pino 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| Pino 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| Pino 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| Pino 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| Pino 31 | VSS — Ground reference |
| Pino 32 | VDD — Positive supply voltage (2.5-6.0 V) |
| Pino 33 | RB0/INT — PORTB bit 0 / External interrupt |
| Pino 34 | RB1 — PORTB bit 1 |
| Pino 35 | RB2 — PORTB bit 2 |
| Pino 36 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| Pino 37 | RB4 — PORTB bit 4 |
| Pino 38 | RB5 — PORTB bit 5 |
| Pino 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pino 40 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pino 41 | NC — Not connected (per datasheet pinout) |
| Pino 42 | NC — Not connected (per datasheet pinout) |
| Pino 43 | NC — Not connected (per datasheet pinout) |
| Pino 44 | NC — Not connected (per datasheet pinout) |
Aplicações típicas
PIC16LC77T-04I/PT é adequado para 7 aplicaçãos: Industrial Sensor Conditioning & Control, HVAC & Building Automation Controllers, Automotive Body & Chassis Subsystems, White-Goods & Consumer Appliance Control, Motor-Control Front-End (PWM & Commutation), Battery-Operated Measurement & Data Logging, Educational & Development Platforms.
Industrial Sensor Conditioning & Control
The PIC16LC77T-04I/PT fits industrial sensor conditioning because it integrates an 8-channel 8-bit ADC, three timers, and 33 I/O pins with 25 mA drive in a single 44-TQFP device. At 4 MHz and 2.5-6.0 V supply, it can directly digitize transducer signals from thermocouples, RTDs, pressure sensors, and 4-20 mA loops without external signal conditioning. The wide Vin range allows direct connection to unregulated 24V-derived rails after a simple LDO. Compared to a discrete op-amp-plus-counter design, this part reduces BOM count by 60-70% and gives a single-chip deterministic 8-bit core for closed-loop control loops.
Recomendado
HVAC & Building Automation Controllers
The PIC16LC77T-04I/PT fits HVAC controllers because it offers USART, SPI, and I2C peripherals for talking to thermostats, damper actuators, and Modbus or BACnet network interfaces while retaining 33 I/O for relay and triac drive. Industrial -40 to +85 °C rating handles unconditioned plant rooms, and the 2.5-6.0 V range accepts 24 VAC rectified supplies after regulation. Four timer modules cover PWM actuator control, fan-speed sampling, and scheduler interrupts. Compared with a 32-bit Cortex part, this MCU cuts firmware complexity and unit cost for fixed-function HVAC boards where firmware rarely changes after OTP programming.
Recomendado
Automotive Body & Chassis Subsystems
The PIC16LC77T-04I/PT fits non-safety automotive body controllers such as seat controllers, mirror adjusters, and lighting drivers because the 33 high-current (25 mA) I/O lines can directly switch LED strings and small relays, reducing discrete driver count. The 2.5-6.0 V range tolerates load-dump conditions when paired with a TVS-protected 12V-to-5V LDO, and the industrial temperature grade covers cabin environments. The OTP memory locks the firmware at production, preventing unauthorized reflashing. Compared to AEC-Q100-qualified MCUs, this part is acceptable only for non-safety subsystems; safety-critical ECUs require Q-graded alternates.
Recomendado
White-Goods & Consumer Appliance Control
The PIC16LC77T-04I/PT fits washing-machine, dishwasher, and microwave front-panel control because the 8-bit PIC core is sufficient for user-interface scanning, sensor sampling, and motor PWM. The 33 I/O pins handle keypad matrix, 7-segment or LCD drive, buzzer, and triac triggering without external expanders, and the 4 MHz clock keeps EMI low. OTP memory is ideal for high-volume white goods where per-unit cost dominates and firmware never changes after release. Compared to a CPLD plus discrete logic implementation, this single-chip MCU reduces board area by 40-50% and lowers assembly cost.
Recomendado
Motor-Control Front-End (PWM & Commutation)
The PIC16LC77T-04I/PT fits low-power BLDC and stepper-motor front-ends because its 8-bit timers and 16-bit timer module can generate complementary PWM at up to 4 MHz / 256 resolution, while the ADC samples back-EMF for sensorless commutation. The 25 mA I/O directly drives logic-level MOSFET gate drivers, removing a level-shifter stage. OTP memory locks the commutation algorithm in production, eliminating in-field firmware corruption risk. Compared with a dedicated motor-control IC, this MCU offers flexible firmware tuning at lower NRE cost, suitable for pumps, fans, and small appliances.
Recomendado
Battery-Operated Measurement & Data Logging
The PIC16LC77T-04I/PT fits portable measurement devices because the 'LC' low-power CMOS variant draws minimal active current at 4 MHz and 2.5-6.0 V supply, while 368 B RAM can buffer small data log bursts before flush to external EEPROM via I2C. The 8-channel ADC monitors battery voltage, sensor inputs, and current shunts simultaneously. OTP memory holds the measurement routine at production, and the 44-TQFP package suits handheld enclosures. Compared with a 32-bit Cortex-M0 part, this MCU offers 30-40% lower active power at modest throughput for instrumentation where MHz-speed is overkill.
Recomendado
Educational & Development Platforms
The PIC16LC77T-04I/PT fits university embedded-systems labs because the PIC16 mid-range architecture exposes students to a Harvard bus, 14-bit instructions, and banked memory - foundational concepts still used in modern RISC-V and ARM cores. Its 33 I/O, ADC, and serial interfaces provide a complete lab vehicle for projects ranging from line-following robots to Modbus slaves. The 44-TQFP is breadboard-friendly via breakout boards. Compared to modern Curiosity or STM32 Nucleo boards, this legacy MCU is cheaper per unit and lets students study OTP-only programming constraints, valuable in industrial control education.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16LC77T-04I/PT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16LC77T-04/PT | PIC16LC77-04I/PT | PIC16F877-04I/PT | PIC16F877A-I/PT |
|---|---|---|---|---|---|
| Package | 44-TQFP (10x10 mm) | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same | 44-TQFP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 14 KB OTP | 14 KB OTP | 14 KB OTP | 14 KB Flash | 14 KB Flash |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Supply Voltage Range | 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 |
| Operating Temperature | -40 to +85 °C (Industrial) | 0 to +70 °C (Commercial) | -40 to +85 °C (Industrial) | -40 to +85 °C (Industrial) | -40 to +85 °C (Industrial) |
| Memory Type | OTP (one-time) | OTP (one-time) | OTP (one-time) | Flash (reprogrammable) | Flash (reprogrammable) |
| Number of I/O | 33 | 33 | 33 | 33 | 33 |
| Lifecycle Status | Obsolete (EOL) | Obsolete (EOL) | Obsolete (EOL) | Active (legacy) | Active |
| Approx. Unit Price (qty 1) | US$4.48 | US$4.20-4.60 | US$4.30-4.70 | US$3.50-4.00 | US$3.20-3.80 |
Principais diferenciais
- Lower minimum supply voltage for battery-powered designs (vs PIC16F877-04I/PT)
- Field-reprogrammable flash memory (vs PIC16LC77T-04I/PT (itself))
- Two package variants in 44-pin footprint (vs PIC16LC77T-04/PT)
Notas de projeto
The PIC16LC77T-04I/PT operates from 2.5 V to 6.0 V; design the supply rail with a low-dropout regulator such as Microchip MCP1700 (3.3 V) or MCP1825 (5 V) and place a 100 nF ceramic decoupling capacitor within 5 mm of each VDD pin (pins 11 and 32). A bulk 10 uF tantalum or aluminum capacitor at the regulator output suppresses load transients when the I/O pins switch 25 mA loads. Brown-out reset is enabled by software to protect OTP code integrity during supply droops.
OTP memory cannot be rewritten - any firmware bug becomes permanent after programming. Use the windowed (CERQUAD) PIC16C77 for prototype debugging, or migrate to the flash-based PIC16F877A-I/PT for production. Also note that pins 1-5 of PORTB have weak internal pull-ups that can be enabled via the RBPU bit; do not rely on them for >5 mA loads, and add external 4.7 kohm resistors when driving CMOS inputs in noisy environments.
Route the MCLR pin (pin 1) with the manufacturer-recommended 10 kohm pull-up to VDD and a 100 nF capacitor to ground for noise-immune reset. Keep the OSC1/OSC2 traces short and symmetric when using a crystal; place the load capacitors (typically 15-22 pF) within 5 mm of the MCU. For EMI-sensitive designs, surround the 44-TQFP with a ground ring connected to the central thermal pad (if exposed) and to VSS pin 12. The 33 high-current I/O lines require trace widths of at least 0.3 mm for 25 mA drive.
Informações de conformidade
RoHS/REACH/lead-free status for this EOL OTP part is not stated in the verified data; assume legacy Microchip OTP parts may not be RoHS-compliant and confirm with the manufacturer for new designs. AEC-Q100 not qualified - use AEC-Q100-grade PIC16F parts for automotive safety applications.
