PIC16C74A-20I/P - 8-bit 20MHz OTP MCU 7KB | Microchip DIP-40
MPN: PIC16C74A-20I/P ✓ فعالPIC16C74A-20I/P جائزہ
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and peripheral interfaces on one silicon die. The PIC16C7X family uses Microchip's enhanced Harvard RISC architecture with 35 single-word instructions, where all instructions execute in one cycle except program branches which take two; this streamlined instruction set reduces code size and improves deterministic interrupt response compared with CISC 8-bit MCUs.
Key features include 7 KB OTP program memory (4K x 14 words), 192 bytes of SRAM data memory, an 8-channel 8-bit A/D converter, two CCP modules for PWM/capture/compare, a USART for asynchronous serial communication, and an MSSP module supporting SPI and I2C. Power consumption is 15 uA typical at 5 V / 4 MHz and 1 uA typical standby at 3 V / 32 kHz, supporting battery-backed designs.
The architecture is fully static CMOS with a 14-bit instruction word, allowing DC to 20 MHz operation. With 35 single-word instructions, single-cycle execution (200 ns at 20 MHz) and a 4-cycle hardware multiplier (8 x 8 in one instruction), the PIC16C74A delivers approximately 5 MIPS throughput. The 8-bit A/D converter uses successive-approximation conversion with analog input multiplexing, allowing direct connection of sensors without external sample-and-hold.
Typical applications include industrial automation controllers, motor drive PWM stages, sensor signal conditioning, instrumentation front-ends, consumer appliance controllers, and embedded communication bridges. For new designs, Microchip recommends the flash-based PIC16F74 as the modern drop-in equivalent with in-system reprogrammability.
Design consideration: OTP memory means firmware is programmed once and cannot be erased - choose the PIC16F74 for prototypes or field-upgradable firmware. Ensure the MCLR reset circuit uses the recommended RC configuration per the datasheet for reliable power-on reset.
This page synthesizes distributor pricing, drop-in alternatives, and engineering design guidance not always presented together in the manufacturer datasheet.
کے لیے ڈراپ اِن متبادل PIC16C74A-20I/P — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC16C74A-20I/P (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Timers, Core Architecture, Serial Interfaces, I/O Pins.
PIC16F74-I/P
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-20/PQ
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-10I/P
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74B-20I/P
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C74A-04I/P
✅ ڈراپ-اِن ⚠️ تفصیلات غیر تصدیق شدہقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16F17176-I/P
✅ ڈراپ-اِن📋 حوالہ جاتی متبادل (کیٹلاگ میں نہیں)
PIC16C74A-20I/P زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | 8-bit PIC16CXX mid-range RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14 words) |
| Data RAM | 192 bytes |
| Data EEPROM | Not present (OTP family) |
| Maximum Clock Speed | 20 MHz |
| Instruction Execution | 200 ns (one cycle, except branches 400 ns) |
| Supply Voltage (VDD) | 4.0 V to 5.5 V |
| I/O Pins | 33 |
| A/D Converter | 8-channel, 8-bit |
| Timers | Two 8-bit + one 16-bit (TMR0/TMR1/TMR2) |
| CCP Modules | 2 (Capture / Compare / PWM) |
| Serial Interfaces | USART + SSP (SPI / I2C) |
| Watchdog Timer | Yes (on-chip WDT with dedicated RC oscillator) |
| I/O Sink/Source Current | 25 mA / 25 mA per pin |
| آپریٹنگ درجہ حرارت | -40 C to +85 C (Industrial) |
| پیکیج | 40-pin PDIP (0.600 in / 15.24 mm) |
| ماؤنٹنگ ٹائپ | Through-Hole (DIP) |
| MSL لیول | Not applicable (through-hole package) |
| Recommended Modern Replacement | PIC16F74 (flash-based, pin-compatible family) |
PIC16C74A-20I/P پن کنفیگریشن
| پن 1 | MCLR — Master Clear (reset) input, active low |
| پن 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| پن 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| پن 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| پن 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / ADC Vref |
| پن 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| پن 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| پن 8 | OSC1/CLKIN — Crystal oscillator input / external clock in |
| پن 9 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| پن 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| پن 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 output |
| پن 12 | RC2/CCP1 — PORTC bit 2 / CCP1 (PWM/Capture/Compare) output |
| پن 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| پن 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| پن 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| پن 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| پن 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| پن 18 | GND — Ground reference |
| پن 19 | VDD — Positive supply (4.0 V to 5.5 V) |
| پن 20 | RB0/INT — PORTB bit 0 / External interrupt input |
| پن 21 | RB1 — PORTB bit 1 |
| پن 22 | RB2 — PORTB bit 2 |
| پن 23 | RB3 — PORTB bit 3 |
| پن 24 | RB4 — PORTB bit 4 |
| پن 25 | RB5 — PORTB bit 5 |
| پن 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| پن 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| پن 28 | RD0 — PORTD bit 0 |
| پن 29 | RD1 — PORTD bit 1 |
| پن 30 | RD2 — PORTD bit 2 |
| پن 31 | RD3 — PORTD bit 3 |
| پن 32 | RD4 — PORTD bit 4 |
| پن 33 | RD5 — PORTD bit 5 |
| پن 34 | RD6 — PORTD bit 6 |
| پن 35 | RD7 — PORTD bit 7 |
| پن 36 | RE0/AN5 — PORTE bit 0 / Analog input 5 |
| پن 37 | RE1/AN6 — PORTE bit 1 / Analog input 6 |
| پن 38 | RE2/AN7 — PORTE bit 2 / Analog input 7 |
| پن 39 | VSS — Ground (secondary) |
| پن 40 | VDD — Positive supply (secondary) |
عام استعمالات
PIC16C74A-20I/P کے لیے موزوں ہے 6 ایپلیکیشنs: Industrial Automation Controllers, Motor Drive PWM Control, Sensor Signal Conditioning Front-End, Consumer Appliance Control Boards, Embedded Communication Bridges, Instrumentation and Test Equipment.
Industrial Automation Controllers
The PIC16C74A-20I/P's 8-channel 8-bit A/D converter, two CCP/PWM modules, USART, and 33 I/O pins make it a strong fit for industrial automation controllers that aggregate multiple sensor inputs and drive actuator outputs. At 20 MHz, it executes 200 ns single-cycle instructions, allowing deterministic scan loops for PLC-style logic. The industrial -40C to +85C temperature grade supports factory-floor enclosures, while 25 mA sink/source per pin can directly drive optocouplers that isolate 24 V field-side drivers without external buffers.
تجویز کردہ
Motor Drive PWM Control
With two CCP modules generating PWM at up to 10-bit resolution and a 16-bit TMR1 for precise commutation timing, the PIC16C74A-20I/P can drive low-cost BLDC and stepper motor controllers. The 20 MHz clock enables 50 kHz PWM with sub-microsecond duty-cycle resolution, sufficient for torque-ripple-sensitive applications. The 33 I/O lines accept Hall-sensor or quadrature-encoder feedback directly; 25 mA sink/source current is adequate to drive optocoupled gate drivers for IGBT/MOSFET power stages rated up to several kW.
تجویز کردہ
Sensor Signal Conditioning Front-End
The PIC16C74A-20I/P's 8-channel 8-bit A/D converter directly digitizes analog signals from temperature sensors, pressure transducers, potentiometers, and bridge sensors without external sample-and-hold. The 20 MHz interface lets the MCU run background filtering algorithms (moving average, Kalman) at sample rates up to ~50 kSPS aggregate, well above most low-frequency industrial sensing requirements. The USART plus MSSP provide simultaneous SPI/I2C connection to digital sensors and a wired backhaul link, all from a single chip.
تجویز کردہ
Consumer Appliance Control Boards
Cost-sensitive appliance controllers - washing machines, dishwashers, microwave ovens, HVAC blowers - benefit from the PIC16C74A-20I/P's 7 KB OTP, integrated A/D, PWM, and USART in a single 40-pin PDIP part. With 192 bytes of RAM, the MCU can manage keypad scanning, LED/LCD multiplexing, and serial communication concurrently. The 4.0 V to 5.5 V supply range aligns with rectified 5 V rails common in white goods, and the industrial temperature grade handles under-cabinet thermal environments.
تجویز کردہ
Embedded Communication Bridges
The PIC16C74A-20I/P integrates both USART (asynchronous RS-232/485) and MSSP (SPI / I2C) peripherals, allowing it to act as a protocol bridge between incompatible field devices. At 20 MHz, it can sustain sustained serial throughput up to ~1 Mbps with low interrupt overhead. Industrial temperature grade, 25 mA I/O drive, and 40-pin PDIP packaging make it serviceable in DIN-rail gateway hardware, where through-hole parts ease hand-rework during prototyping or field service.
تجویز کردہ
Instrumentation and Test Equipment
For handheld meters, panel instruments, and laboratory test gear, the PIC16C74A-20I/P's 8-bit ADC, 16-bit TMR1 for event timing, and USART for PC datalogging provide a complete mixed-signal front end. The 5 MIPS throughput allows real-time RMS calculation or FFT-lite post-processing of sensor data while still servicing display updates. The 192-byte RAM supports circular data buffers for short captures, and 25 mA I/O drive directly backlights small character LCDs without external buffers.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16C74A-20I/P — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16F74-I/P | PIC16C74A-20/P | PIC16C74A-10I/P | PIC16C74B-20I/P | PIC16C74A-04I/P | PIC16F17176-I/P |
|---|---|---|---|---|---|---|---|
| Package | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Max Clock Speed | 20 MHz | 20 MHz | 20 MHz | 10 MHz | 20 MHz | 4 MHz | 32 MHz (max for PIC16F1 family) |
| Program Memory | 7 KB OTP | 7 KB Flash | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 28 KB Flash |
| Data RAM | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 2048 bytes |
| A/D Converter | 8 ch x 8-bit | 8 ch x 8-bit | 8 ch x 8-bit | 8 ch x 8-bit | 8 ch x 8-bit (improved) | 8 ch x 8-bit | varies by family member (8 ch x 10-bit typical) |
| CCP Modules | 2 | 2 | 2 | 2 | 2 (enhanced) | 2 | varies (typically 3-4) |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) |
| I/O Pins | 33 | 33 | 33 | 33 | 33 | 33 | ~35 |
| Reprogrammability | No (OTP) | Yes (Flash, in-system) | No (OTP) | No (OTP) | No (OTP) | No (OTP) | Yes (Flash, in-system) |
اہم امتیازی خصوصیات
- Industry-standard 40-pin PDIP with full peripheral integration (بمقابلہPIC16C73B-20I/P)
- Industrial temperature grade with 20 MHz performance (بمقابلہPIC16C74A-04I/P)
- Mature, widely-available drop-in replacement path to flash (بمقابلہPIC16C72-20I/P)
ڈیزائن نوٹس
OTP program memory means firmware cannot be erased or rewritten after programming - a single code-change after production requires re-spinning every unit. For prototypes, development fleets, or any product likely to receive firmware updates, choose the PIC16F74 (flash-based, same 40-pin PDIP pinout) instead. Reserve the PIC16C74A-20I/P for fully qualified, locked-firmware production where cost per unit is paramount.
The PIC16C74A-20I/P operates from 4.0 V to 5.5 V; voltages below 4 V risk BOR (brown-out reset) or ADC reference drift. Place a 100 nF decoupling capacitor as close as possible to each VDD/VSS pair (pin 19/18 and pin 40/39) plus a bulk 10 uF tantalum or ceramic on the main 5 V rail. For battery-backed designs, use a low-Iq LDO such as MCP1700 in series with the supply to maintain standby current below 1 uA when the MCU is in sleep mode.
The 40-pin PDIP footprint (0.600 in / 15.24 mm row spacing) accepts standard IC sockets, which is recommended for prototype and serviceable designs. Reserve a small prototype area near the MCU for an ICSP header (RB6/PGC, RB7/PGD, MCLR, VDD, GND) so OTP units can be programmed in-circuit before socket insertion. Keep crystal traces short (<= 10 mm) and guard OSC1/OSC2 with a ground ring to reduce EMI pickup on the 20 MHz oscillator.
Pin 1 (MCLR) requires a 10 kohm pull-up to VDD for normal operation and a 100 nF capacitor to ground for noise immunity - omitting the cap makes the reset line susceptible to noise-induced spurious resets. The ADC inputs (RA0-RA5, RE0-RE2) should be routed away from digital switching lines; a ground keep-out zone around the analog traces plus a star-ground topology at the AVdd pin improves ADC accuracy by 1-2 LSB.
The PIC16C74A-20I/P's I/O sink/source of 25 mA per pin is sufficient for small relays or optocouplers but inadequate for direct solenoid or motor drive - always buffer high-current loads with discrete transistors or MOSFETs. When using PWM outputs at frequencies above 25 kHz, place a small RC filter (100 ohm + 100 pF) on the PWM line near the MCU to slow edge rates and reduce radiated EMI.
تعمیل کی معلومات
RoHS, REACH, lead-free, and halogen-free status were not explicitly stated in the verified web data; consult the manufacturer product page or lot-specific documentation for definitive compliance. AEC-Q100 is not applicable - this is a general-purpose industrial MCU, not automotive-qualified.
