PIC16C74A-10/P - 8-Bit 10MHz OTP MCU 7KB 192 RAM | Microchip
MPN: PIC16C74A-10/P ✗ סוף ייצורPIC16C74A-10/P סקירה
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.
חלופות תחליף ישיר עבור PIC16C74A-10/P — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
דגמים מאותה סדרה התואמים Drop-in עם PIC16C74A-10/P (אותו גורם צורה וטביעת רגל) — שונים ב Package, Core Architecture, Timers, Operating Temperature, Program Memory Size.
PIC16C74A-10/L
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16C74A-04I/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16C74B-20I/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16F74-I/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16F877A-I/P
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16C74A-10/P דירוגים מרביים ומאפיינים חשמליים
| 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) |
| מתח אספקה | 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 |
| מארז | 40-pin PDIP (P) |
| סוג הרכבה | Through-Hole |
| טמפרטורת פעולה | -40C to +85C (industrial) |
| סטטוס RoHS | Compliant |
תצורת פינים של PIC16C74A-10/P
| פין 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| פין 2 | RA0/AN0 — PORTA bit 0 / Analog channel 0 |
| פין 3 | RA1/AN1 — PORTA bit 1 / Analog channel 1 |
| פין 4 | RA2/AN2 — PORTA bit 2 / Analog channel 2 |
| פין 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog channel 3 / ADC VREF+ |
| פין 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| פין 7 | RA5/AN4/SS — PORTA bit 5 / Analog channel 4 / SPI slave select |
| פין 8 | RE0/RD/AN5 — PORTE bit 0 / Read control / Analog channel 5 |
| פין 9 | RE1/WR/AN6 — PORTE bit 1 / Write control / Analog channel 6 |
| פין 10 | RE2/CS/AN7 — PORTE bit 2 / Chip select / Analog channel 7 |
| פין 11 | VDD — Positive supply (5V) |
| פין 12 | VSS — Ground reference |
| פין 13 | OSC1/CLKIN — Crystal oscillator input / external clock in |
| פין 14 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| פין 15 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock in |
| פין 16 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| פין 17 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM1 |
| פין 18 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| פין 19 | RD0/PSP0 — PORTD bit 0 / Parallel Slave Port bit 0 |
| פין 20 | RD1/PSP1 — PORTD bit 1 / Parallel Slave Port bit 1 |
| פין 21 | RD2/PSP2 — PORTD bit 2 / Parallel Slave Port bit 2 |
| פין 22 | RD3/PSP3 — PORTD bit 3 / Parallel Slave Port bit 3 |
| פין 23 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| פין 24 | RC5/SDO — PORTC bit 5 / SPI data out |
| פין 25 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| פין 26 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| פין 27 | RD4/PSP4 — PORTD bit 4 / Parallel Slave Port bit 4 |
| פין 28 | RD5/PSP5 — PORTD bit 5 / Parallel Slave Port bit 5 |
| פין 29 | RD6/PSP6 — PORTD bit 6 / Parallel Slave Port bit 6 |
| פין 30 | RD7/PSP7 — PORTD bit 7 / Parallel Slave Port bit 7 |
| פין 31 | VSS — Ground reference |
| פין 32 | VDD — Positive supply (5V) |
| פין 33 | RB0/INT — PORTB bit 0 / External interrupt |
| פין 34 | RB1 — PORTB bit 1 |
| פין 35 | RB2 — PORTB bit 2 |
| פין 36 | RB3/PGM — PORTB bit 3 / Low-voltage programming |
| פין 37 | RB4 — PORTB bit 4 |
| פין 38 | RB5 — PORTB bit 5 |
| פין 39 | RB6/PGC — PORTB bit 6 / ICSP clock |
| פין 40 | RB7/PGD — PORTB bit 7 / ICSP data |
יישומים טיפוסיים
PIC16C74A-10/P מתאים עבור 6 יישוםs: 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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
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.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC16C74A-10/P — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | 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 |
מבדילים עיקריים
- Higher CPU performance (לעומתPIC16C74A-04I/P)
- Re-programmable flash memory (לעומתPIC16F74-I/P)
- More program memory and RAM (לעומתPIC16F877A-I/P)
הערות תכנון
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.
מידע על תאימות
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.
