PIC16C74A-20I/P - 8-bit 20MHz OTP MCU 7KB | Microchip DIP-40
Teilenummer: PIC16C74A-20I/P ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $13.65 | $13,65 |
| 10 | $12.28 | $122,80 |
| 100 | $10.92 | $1.092,00 |
| 500 | $9.56 | $4.780,00 |
| 1.000 | $8.74 | $8.740,00 |
PIC16C74A-20I/P Übersicht
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.
Drop-in-Alternativen für PIC16C74A-20I/P – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC16C74A-20I/P (gleiche Bauform und Footprint) – abweichend in Package, Timers, Core Architecture, Serial Interfaces, Data EEPROM.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC16F74-I/P
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC16C74A-20/PQ
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$6.1 / Stück
Datenblatt ansehen →PIC16C74A-10I/P
✅ Drop-In✓ Auf Lager
$4.95 / Stück
Datenblatt ansehen →PIC16C74B-20I/P
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$6.78 / Stück
Datenblatt ansehen →PIC16C74A-04I/P
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$7.5 / Stück
Datenblatt ansehen →PIC16F17176-I/P
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
PIC16C74A-20I/P Grenzwerte & elektrische Eigenschaften
| 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 |
| Betriebstemperatur | -40 C to +85 C (Industrial) |
| Gehäuse | 40-pin PDIP (0.600 in / 15.24 mm) |
| Montageart | Through-Hole (DIP) |
| MSL-Level | Not applicable (through-hole package) |
| Recommended Modern Replacement | PIC16F74 (flash-based, pin-compatible family) |
PIC16C74A-20I/P Pin-Konfiguration
| Pin 1 | MCLR — Master Clear (reset) input, active low |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / Analog input 2 |
| Pin 5 | RA3/AN3/VREF — PORTA bit 3 / Analog input 3 / ADC Vref |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / Analog input 4 / SPI slave select |
| Pin 8 | OSC1/CLKIN — Crystal oscillator input / external clock in |
| Pin 9 | OSC2/CLKOUT — Crystal oscillator output / clock out |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator out / Timer1 clock in |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator in / CCP2 output |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 (PWM/Capture/Compare) output |
| Pin 13 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I2C clock |
| Pin 14 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I2C data |
| Pin 15 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 16 | RC6/TX/CK — PORTC bit 6 / USART TX / USART clock |
| Pin 17 | RC7/RX/DT — PORTC bit 7 / USART RX / USART data |
| Pin 18 | GND — Ground reference |
| Pin 19 | VDD — Positive supply (4.0 V to 5.5 V) |
| Pin 20 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pin 21 | RB1 — PORTB bit 1 |
| Pin 22 | RB2 — PORTB bit 2 |
| Pin 23 | RB3 — PORTB bit 3 |
| Pin 24 | RB4 — PORTB bit 4 |
| Pin 25 | RB5 — PORTB bit 5 |
| Pin 26 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 27 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 28 | RD0 — PORTD bit 0 |
| Pin 29 | RD1 — PORTD bit 1 |
| Pin 30 | RD2 — PORTD bit 2 |
| Pin 31 | RD3 — PORTD bit 3 |
| Pin 32 | RD4 — PORTD bit 4 |
| Pin 33 | RD5 — PORTD bit 5 |
| Pin 34 | RD6 — PORTD bit 6 |
| Pin 35 | RD7 — PORTD bit 7 |
| Pin 36 | RE0/AN5 — PORTE bit 0 / Analog input 5 |
| Pin 37 | RE1/AN6 — PORTE bit 1 / Analog input 6 |
| Pin 38 | RE2/AN7 — PORTE bit 2 / Analog input 7 |
| Pin 39 | VSS — Ground (secondary) |
| Pin 40 | VDD — Positive supply (secondary) |
Typische Anwendungen
PIC16C74A-20I/P ist geeignet für 6 Anwendungs: 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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
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.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC16C74A-20I/P – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | 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) |
Wichtigste Unterscheidungsmerkmale
- Industry-standard 40-pin PDIP with full peripheral integration (vs. PIC16C73B-20I/P)
- Industrial temperature grade with 20 MHz performance (vs. PIC16C74A-04I/P)
- Mature, widely-available drop-in replacement path to flash (vs. PIC16C72-20I/P)
Designhinweise
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.
Compliance-Informationen
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.
