PIC16C74A-10/P - 8-Bit 10MHz OTP MCU 7KB 192 RAM | Microchip
N.º da peça: PIC16C74A-10/P ✗ Fim de vida| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $7.5 | $7,50 |
| 10 | $6.75 | $67,50 |
| 100 | $5.95 | $595,00 |
| 500 | $5.25 | $2.625,00 |
| 1.000 | $4.65 | $4.650,00 |
PIC16C74A-10/P Visão geral
An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU, memory (ROM/RAM), and peripheral blocks on a single silicon die, executing instructions from a Harvard-architecture instruction set. The PIC16C7X family belongs to the mid-range PIC16CXX lineage of microcontrollers -> RISC microcontrollers -> embedded microcontrollers -> microprocessors -> semiconductors. These MCUs are widely used for industrial control, motor drive, instrumentation, and consumer product designs because of their deterministic instruction timing, low power consumption, and mature toolchain support.
Key features of the PIC16C74A-10/P include a 10 MHz maximum operating frequency (200 ns instruction execution), 8 channels of 8-bit analog-to-digital conversion, two capture/compare/PWM modules, a USART serial port, and a synchronous serial port (SSP) for SPI/I2C communication. The OTP program memory allows one-time factory or in-circuit programming, distinguishing this part from flash-based F-series PIC16 devices that permit in-field re-programming.
Architecturally, the PIC16C74A-10/P uses a RISC-based core with only 35 single-word instructions, simplifying software development while delivering deterministic throughput. The integrated analog comparator, watchdog timer, and brown-out reset circuit further reduce external component requirements in typical designs. Operating from 4V to 5.5V, the device is tailored for legacy 5V industrial systems.
Typical applications include industrial motor control, HVAC actuator interfaces, instrumentation front-ends, security system controllers, and consumer appliance control boards. The wide I/O count and analog integration suit designs that previously required separate logic and ADC chips.
When designing with this part, note that the OTP memory cannot be re-programmed; if in-field firmware updates are required, the user should evaluate PIC16F74 or PIC16F877A flash-based alternatives in the same 40-pin PDIP footprint.
This page synthesizes distributor pricing, drop-in alternatives from the same PIC16C7X family, and practical design notes not found in the manufacturer datasheet alone.
Alternativas drop-in para PIC16C74A-10/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 PIC16C74A-10/P (mesmo formato e footprint) — diferindo em Package, Core Architecture, Timers, Operating Temperature, Program Memory Size.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
PIC16C74A-10/L
✅ Drop-In✓ Em estoque
$8.4 / unidade
Ver ficha técnica →PIC16C74A-04I/P
✅ Drop-In✓ Em estoque
$7.5 / unidade
Ver ficha técnica →PIC16C74B-20I/P
✅ Drop-In✓ Em estoque
$6.78 / unidade
Ver ficha técnica →PIC16F74-I/P
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
PIC16F877A-I/P
✅ Drop-In✓ Em estoque
Consulte o preço
Ver ficha técnica →PIC16C74A-10/P Classificações máximas e características elétricas
| Core Architecture | 8-bit PIC16CXX mid-range RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14 words) |
| RAM | 192 bytes |
| Maximum CPU Frequency | 10 MHz |
| Instruction Execution Time | 200 ns (10 MHz, single cycle) |
| Tensão de alimentação | 4 V to 5.5 V |
| I/O Pins | 33 |
| ADC | 8-channel, 8-bit |
| PWM Modules | 2 (Capture/Compare/PWM) |
| USART | 1 (Addressable) |
| Synchronous Serial Port | Yes (SPI / I2C master) |
| Timers | 3 (Timer0, Timer1, Timer2) |
| Watchdog Timer | Yes (on-chip, software-enabled) |
| Brown-Out Reset | Yes |
| Encapsulamento | 40-pin PDIP (P) |
| Tipo de montagem | Through-Hole |
| Temperatura de operação | -40C to +85C (industrial) |
| Status RoHS | Compliant |
Configuração de pinos do PIC16C74A-10/P
| Pino 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Pino 2 | RA0/AN0 — PORTA bit 0 / Analog channel 0 |
| Pino 3 | RA1/AN1 — PORTA bit 1 / Analog channel 1 |
| Pino 4 | RA2/AN2 — PORTA bit 2 / Analog channel 2 |
| Pino 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog channel 3 / ADC VREF+ |
| Pino 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pino 7 | RA5/AN4/SS — PORTA bit 5 / Analog channel 4 / SPI slave select |
| Pino 8 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog channel 5 |
| Pino 9 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog channel 6 |
| Pino 10 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog channel 7 |
| Pino 11 | VDD — Positive supply (5V) |
| Pino 12 | VSS — Ground reference |
| Pino 13 | OSC1/CLKIN — Crystal oscillator input / external clock in |
| Pino 14 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| Pino 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock in |
| Pino 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pino 17 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM1 |
| 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 TX / USART clock |
| Pino 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART 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 (5V) |
| 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 |
Aplicações típicas
PIC16C74A-10/P é adequado para 6 aplicaçãos: Industrial Motor Control, HVAC Actuator Interface, Security System Controller, Instrumentation Front-End, Consumer Appliance Control, Automotive Aftermarket Modules.
Industrial Motor Control
The PIC16C74A-10/P is well suited to industrial motor control designs because its 8-channel 8-bit ADC and dual Capture/Compare/PWM modules drive H-bridge MOSFET stages directly from a 5V rail. At 10 MHz CPU clock (200 ns instruction cycle), the device executes the PI control loop fast enough to handle sub-millisecond torque updates for small DC and stepper motors. The 33 I/O pins allow direct interface to encoder inputs, limit switches, and fault indicators without external logic. According to the PIC16C7X datasheet, the PWM modules support up to 10-bit duty resolution, sufficient for variable-speed drives from 100 Hz to 25 kHz. Brown-out reset protects motor parameters in noisy 24V-bus derived 5V supplies typical of industrial cabinets.
Recomendado
HVAC Actuator Interface
In HVAC actuator interfaces, the PIC16C74A-10/P reads thermistor or 4-20 mA sensor signals through its 8-channel ADC and drives damper/servo outputs via PWM. The wide 4V to 5.5V supply range accommodates 5V linear regulators fed from 24V HVAC rails. Built-in USART supports BACnet or Modbus slave communication over RS-485 transceivers. The 35-instruction RISC core is well documented and supported by Microchip's MPLAB assembler and HI-TECH C compiler, simplifying IEC 60730 safety-class firmware development. The 192-byte RAM is sufficient for PID state variables, sensor filtering, and protocol buffers in typical HVAC zone controller designs.
Recomendado
Security System Controller
Security system panels benefit from the PIC16C74A-10/P's 33 I/O count, which accommodates multiple zone inputs (PIR, door contact, glass-break), keypad scanning, and siren/strobe output drivers without external mux ICs. The integrated synchronous serial port (SSP) supports SPI EEPROMs for event-log storage, while the USART drives a central-station modem or GSM module. The OTP memory ensures firmware cannot be tampered with by simple external reprogramming, an advantage for anti-tamper applications. Watchdog timer and brown-out reset protect against code runaway and supply glitches, both critical for UL-listed security installations requiring continuous fault monitoring.
Recomendado
Instrumentation Front-End
Test and measurement front-ends use the PIC16C74A-10/P to digitize analog signals via its 8-channel ADC, drive character LCDs through parallel PORTD/PORTE pins, and stream readings over UART to a host PC. The 10 MHz instruction cycle supports >20 kHz ADC sampling for low-bandwidth vibration and strain-gauge measurement. On-chip comparators and capture modules enable frequency-to-count conversion for tachometer inputs. The 7 KB OTP program memory accommodates calibration tables and linearization routines needed in sensor signal conditioning paths. RoHS-compliant PDIP packaging allows hand-soldered prototype construction common in lab instrumentation.
Recomendado
Consumer Appliance Control
Washing machines, dishwashers, and small kitchen equipment leverage the PIC16C74A-10/P's integrated peripherals to replace discrete logic: timers drive motor phases, ADC monitors water level/temperature, PWM modulates heater elements, and I/O reads button matrix and rotary encoders. The 5V supply rail simplifies power supply design using low-cost linear regulators from rectified mains. The 33 I/O count accommodates all user-interface and load-control wiring in a single chip, reducing BOM cost. Microchip's mature MPLAB toolchain and reference designs shorten consumer appliance time-to-production, while OTP memory prevents unauthorized cloning of firmware in cost-sensitive high-volume products.
Recomendado
Automotive Aftermarket Modules
Aftermarket automotive modules such as gauge clusters, alarm systems, and auxiliary lighting drivers use the PIC16C74A-10/P at its 4V to 5.5V supply range, which is compatible with 12V vehicle electrical systems after regulation. The 8-channel ADC reads multiple sensor inputs (temperature, voltage, switch positions) while the PWM modules drive LED dimmers and motor actuators. The 33 I/O count supports matrix keypads and RGB indicator rings without external expanders. Operating temperature of -40C to +85C covers under-dash and engine-bay-adjacent installations. Brown-out reset and watchdog timer ensure reliable operation across automotive cranking transients typical of 12V lead-acid battery systems.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para PIC16C74A-10/P — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | PIC16C74A-10/L | PIC16C74B-20I/P | PIC16F74-I/P | PIC16F877A-I/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 40-pin PDIP | 40-pin CERDIP (windowed) | 40-pin PDIP - same | 40-pin PDIP - same | 40-pin PDIP - same |
| Program Memory Type | OTP (7 KB) | Windowed EPROM (7 KB, prototype use) | OTP (7 KB) | Flash (7 KB) | Flash (14 KB) |
| Maximum CPU Frequency | 10 MHz | 10 MHz | 20 MHz | 20 MHz | 20 MHz |
| RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 368 bytes |
| ADC | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 8-bit | 8-channel, 10-bit |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 4 V to 5.5 V | 4 V to 5.5 V | 4 V to 5.5 V | 4 V to 5.5 V | 4 V to 5.5 V |
| Lifecycle Status | NRND | NRND | Production (legacy) | Active (recommended replacement) | Active |
Principais diferenciais
- Higher CPU performance (vs PIC16C74A-04I/P)
- Re-programmable flash memory (vs PIC16F74-I/P)
- More program memory and RAM (vs PIC16F877A-I/P)
Notas de projeto
Decouple both VDD pins (pin 11 and pin 32) with 100 nF ceramic capacitors placed within 5 mm of each pin, plus a single 10 uF bulk electrolytic near the package. The PIC16C74A-10/P draws up to 25 mA active at 10 MHz and 5 V; ensure the regulator provides 50% headroom for transient spikes. Tie MCLR/VPP (pin 1) high through a 10 kohm resistor and add a 100 nF cap to ground for noise immunity, per Microchip PIC16C7X datasheet section on reset circuitry. Do not power the MCU through long wire harnesses without local bulk capacitance.
Route the crystal traces (OSC1/OSC2, pins 13-14) as short as possible and keep them away from PORTC switching lines to avoid coupling noise into the system clock. Use a guarded ground ring around the crystal can to reduce EMI. For through-hole PDIP prototypes, place a ground plane on the opposite PCB side to give the MCU a low-impedance return path; this also helps dissipate the small amount of heat (~125 mW at full speed). Avoid running high-current traces under the IC to prevent ground-bounce during switching events.
Do not assume code compiled for PIC16F74 will run on PIC16C74A without checking oscillator configuration bits and watchdog enable state - the C-variant uses different CONFIG word addresses. When designing with the OTP variant, ensure firmware is fully validated on a windowed PIC16C74A-10/L before committing to OTP programming, because OTP cannot be erased. Brown-out reset must be enabled in the configuration word for reliable 5V industrial operation; leaving BOR disabled risks corrupted EEPROM variables during power dips.
Informações de conformidade
RoHS and REACH compliant per Microchip product page. Not AEC-Q100 qualified - this is a commercial/industrial grade MCU. Choose PIC16F77 automotive-grade variants for AEC-Q100 requirements.
