PIC16C774-I/PT - 8-Bit OTP MCU 20MHz 12-bit ADC | Microchip
MPN: PIC16C774-I/PT ✓ פעילPIC16C774-I/PT סקירה
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripherals such as ADCs, timers, and communication ports. The PIC16C774 sits in the mid-range PIC16C family tree: PIC16C -> 8-bit PIC -> PIC microcontroller -> microcontroller -> embedded processor -> semiconductor. Its OTP memory allows low-cost, fast-turnaround prototyping and production for mature designs where code is stable.
Key features include 10 channels of 12-bit ADC (vs. the typical 8-bit ADC in the family), 33 digital I/O pins arranged across five ports, an industrial -40C to +85C operating temperature range (signified by the "-I" suffix), two 8-bit timer/counters with one 16-bit timer/counter, a Watchdog Timer with its own on-chip RC oscillator, and brown-out reset circuitry. The OTP program memory supports in-circuit serial programming through the ICSP interface.
The PIC16C774 uses Microchip's Harvard-architecture RISC core with a 14-bit instruction word optimized for compact code density. The 12-bit successive-approximation ADC delivers better than 1 LSB integral nonlinearity, suitable for instrumentation, motor control feedback, and sensor signal acquisition. The 5 V supply range (4.0 V to 5.5 V) and the 20 MHz clock budget provide deterministic real-time control in noisy industrial environments.
Typical applications include industrial process control, multi-channel sensor data acquisition, HVAC actuator control, instrumentation front-ends, and embedded control for medical and test equipment. The 10-channel 12-bit ADC removes the need for an external ADC IC, reducing board area and BOM cost.
When designing with this part, ensure the MCLR reset circuit follows Microchip application note TB008 with a proper pull-up; the ICSP interface shares pins with PORTC and PORTE, so isolate programming access during run-time. Decouple VDD/VSS pairs with 100 nF ceramic capacitors placed within 5 mm of each pin pair for ADC reference stability.
This page synthesizes distributor pricing, drop-in TQFP-44 alternatives from the same Microchip PIC16C family, and practical design notes not consolidated in the manufacturer datasheet.
חלופות תחליף ישיר עבור PIC16C774-I/PT — 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 PIC16C774-I/PT (אותו גורם צורה וטביעת רגל) — שונים ב Package, Program Memory Size, Timers, RAM Size, Program Memory Type.
PIC16F877-I/PT
✅ Drop-In📋 חלופה להתייחסות (לא בקטלוג)
PIC16C74B-20I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16C74BT-04I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16C67T-04I/PT
✅ Drop-Inצור קשר לקבלת מחיר
הצג גיליון נתונים ←PIC16C774-I/PT דירוגים מרביים ומאפיינים חשמליים
| Family | PIC® 16C |
| Core | 8-bit RISC (Harvard architecture) |
| תדר שעון מקסימלי | 20 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14 words) |
| Data RAM | 256 B |
| Data EEPROM | Not present (ROMless data) |
| ADC Resolution | 12-bit |
| ADC Channels | 10 |
| מתח אספקה | 4.0 V to 5.5 V |
| I/O Pins | 33 |
| Timers | Two 8-bit + one 16-bit |
| טמפרטורת פעולה | -40C to +85C (Industrial) |
| מארז | TQFP-44 (10x10 mm) |
| סוג הרכבה | Surface Mount |
| Watchdog Timer | Yes (independent on-chip RC) |
| Brown-out Reset | Yes |
| ICSP (In-Circuit Serial Programming) | Yes |
תצורת פינים של PIC16C774-I/PT
| פין 1 | MCLR/VPP — Master clear reset / programming voltage input |
| פין 2 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| פין 3 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| פין 4 | VDD — Digital supply voltage |
| פין 5 | VSS — Digital ground |
| פין 6 | RA0/AN0 — Digital I/O / analog input 0 |
| פין 7 | RA1/AN1 — Digital I/O / analog input 1 |
| פין 8 | RA2/AN2 — Digital I/O / analog input 2 |
| פין 9 | RA3/AN3/VREF — Digital I/O / analog input 3 / ADC VREF+ |
| פין 10 | RA4/AN4/T0CKI — Digital I/O / analog input 4 / Timer0 clock in |
| פין 11 | AVDD — Analog supply voltage (ADC VREF+) |
| פין 12 | AVSS — Analog ground (ADC VREF-) |
| פין 13 | RA5/AN5/SS — Digital I/O / analog input 5 / SPI slave select |
| פין 14 | RE0/RD/AN6 — Digital I/O / parallel port read / analog input 6 |
| פין 15 | RE1/WR/AN7 — Digital I/O / parallel port write / analog input 7 |
| פין 16 | RE2/CS/AN8 — Digital I/O / parallel port chip select / analog input 8 |
| פין 17 | VDD — Digital supply voltage |
| פין 18 | VSS — Digital ground |
| פין 19 | OSC1/CLKIN — Oscillator crystal input / external clock in (alternate) |
| פין 20 | OSC2/CLKOUT — Oscillator crystal output (alternate) |
| פין 21 | RB0/INT — Digital I/O / external interrupt |
| פין 22 | RB1 — Digital I/O |
| פין 23 | RB2 — Digital I/O |
| פין 24 | RB3 — Digital I/O |
| פין 25 | RB4 — Digital I/O |
| פין 26 | RB5 — Digital I/O |
| פין 27 | RB6/PGC — Digital I/O / ICSP serial clock |
| פין 28 | RB7/PGD — Digital I/O / ICSP serial data |
| פין 29 | RC0 — Digital I/O |
| פין 30 | RC1 — Digital I/O |
| פין 31 | RC2 — Digital I/O |
| פין 32 | RC3 — Digital I/O |
| פין 33 | RC4 — Digital I/O |
| פין 34 | RC5 — Digital I/O |
| פין 35 | RC6 — Digital I/O |
| פין 36 | RC7 — Digital I/O |
| פין 37 | RD0 — Digital I/O |
| פין 38 | RD1 — Digital I/O |
| פין 39 | RD2 — Digital I/O |
| פין 40 | RD3 — Digital I/O |
| פין 41 | RD4 — Digital I/O |
| פין 42 | RD5 — Digital I/O |
| פין 43 | RD6 — Digital I/O |
| פין 44 | RD7 — Digital I/O |
יישומים טיפוסיים
PIC16C774-I/PT מתאים עבור 6 יישוםs: Industrial Process Control, Multi-Channel Sensor Data Acquisition, HVAC Actuator Control, Medical Instrumentation Front-End, Automotive Sensor Interface (Cabin), Test and Measurement Equipment.
Industrial Process Control
The PIC16C774-I/PT fits industrial process control because its 10-channel 12-bit ADC delivers 4x the resolution of typical 8-bit controllers, enabling precise measurement of temperature, pressure, and flow sensors without an external ADC IC. Operating from 4.0 V to 5.5 V at industrial -40C to +85C, it tolerates factory-floor supply noise. The RISC core running at 20 MHz executes control loops within deterministic timing budgets. Pair the MCU with a 4N25 optocoupler on each digital output for galvanic isolation of 24 V actuators.
מומלץ
Multi-Channel Sensor Data Acquisition
The PIC16C774-I/PT's 10-channel 12-bit ADC multiplexes up to ten analog sensors (thermistors, load cells, strain gauges) into a single chip, eliminating external analog multiplexers. At 20 MHz clock the successive-approximation ADC achieves roughly 50 ksps aggregate throughput, suitable for 1 kHz per-channel sampling on a 10-channel scan. The 256 B RAM buffers scan data before UART transmission. Add a MAX232 line driver for RS-232 output to a host PC.
מומלץ
HVAC Actuator Control
The PIC16C774-I/PT drives TRIAC/relay-based HVAC actuators via PWM outputs on its 33 I/O pins, while reading thermistor temperature inputs through its 12-bit ADC for closed-loop control. Industrial temperature grade (-40C to +85C) handles plenum heat, and 5 V operation tolerates typical HVAC 24 VAC rectified rails. OTP memory locks in tested firmware to satisfy safety certification. Use CCP modules to generate zero-cross TRIAC firing pulses synchronized to AC mains.
מומלץ
Medical Instrumentation Front-End
The PIC16C774-I/PT's 12-bit ADC and 256 B RAM provide front-end digitization for medical instrumentation such as blood-pressure monitors, pulse oximeters, and infusion pump controllers. The PIC's deterministic RISC pipeline avoids timing jitter that could corrupt sensor readouts. Industrial temperature grade supports portable diagnostic equipment. Combined with an instrumentation amplifier like the INA128 and an LCD driver, it forms a complete regulated medical signal acquisition node.
מומלץ
Automotive Sensor Interface (Cabin)
The PIC16C774-I/PT is well suited to non-powertrain automotive sensor interfaces inside the cabin: seat-occupancy detection, climate sensors, ambient light monitoring, and battery management telemetry. The 12-bit ADC discriminates sub-percent signal changes needed for seat-weight classification. Industrial temperature grade handles cabin thermal swings; for under-hood applications choose AEC-Q100-qualified PIC18 families. CAN bus connectivity is added via an external MCP2515 controller.
מומלץ
Test and Measurement Equipment
The PIC16C774-I/PT powers bench-top test and measurement instruments (handheld multimeters, calibration boxes, lab data loggers) where its 12-bit ADC and 20 MHz RISC pipeline deliver accurate signal capture. The 33 I/O pins interface directly to LCD modules, rotary encoders, and function-key keypads without glue logic. OTP memory secures calibration constants against field tampering. The ICSP interface allows factory calibration updates before OTP bit-cell locking.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור PIC16C774-I/PT — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
השוואה עם חלופות
| פרמטר | מוצר זה | PIC16F877-I/PT | PIC16C74B-20I/PT | PIC16C74BT-04I/PT | PIC16C67T-04I/PT |
|---|---|---|---|---|---|
| Package | TQFP-44 (10x10 mm) | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same | TQFP-44 (10x10) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP 7 KB | Flash 7 KB | OTP 4 KB | OTP 4 KB | OTP 8 KB |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 4 MHz |
| ADC Resolution | 12-bit | 10-bit | 8-bit | 8-bit | None |
| ADC Channels | 10 | 8 | 8 | 8 | 0 |
| Data EEPROM | Not present | 256 B | Not present | Not present | Not present |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Supply Voltage | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V | 4.0 V to 5.5 V |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
מבדילים עיקריים
- Higher 12-bit ADC resolution vs PIC16C74B family (לעומתPIC16C74B-20I/PT)
- More ADC channels than PIC16F877 (לעומתPIC16F877-I/PT)
- Faster clock than PIC16C67 legacy (לעומתPIC16C67T-04I/PT)
הערות תכנון
Estimated: at 20 MHz clock and 5 V supply with all 33 I/O pins driving CMOS loads, the PIC16C774-I/PT core draws approximately 15 mA. Decouple VDD/VSS pairs with 100 nF ceramic capacitors placed within 5 mm of each pin pair; add a 10 uF bulk tantalum on the main VDD rail. AVDD (pin 11) and AVSS (pin 12) require separate low-noise analog decoupling (10 uF + 100 nF) to preserve 12-bit ADC accuracy.
Do not leave MCLR floating. The MCLR pin (pin 1) requires a 10 kohm pull-up to VDD; otherwise spurious resets occur in noisy industrial environments. The ICSP programming interface shares RB6 (PGC) and RB7 (PGD) with PORTB; ensure external circuitry on these pins does not load the programmer during in-circuit programming. According to Microchip TB008, isolate programming access with a 4.7 kohm series resistor if shared peripherals are present.
TQFP-44 fine-pitch (0.8 mm) land patterns require 4-mil trace-and-space PCB manufacturing for reliable soldering. Place the MCU centrally on the board to minimize ADC analog trace lengths. Route AVSS as a dedicated analog ground island returning to the VSS star-ground point at the power connector, and place a ferrite bead between VDD and AVDD to suppress digital switching noise from corrupting ADC conversions.
For the 12-bit ADC to achieve better than 1 LSB INL, keep analog input traces short and shielded by AVSS ground pours. Avoid routing digital signals (PORTB/C/D) directly across the analog input traces; instead route them on the opposite PCB layer. The ADC reference voltage pin (RA3/AN3/VREF) requires a 10 uF + 100 nF capacitor to AVSS within 10 mm to prevent reference drift during conversions.
מידע על תאימות
Compliance status not explicitly listed in retrieved web data. Microchip legacy PIC16C family historically shipped in lead-free packages; verify with manufacturer datasheet before RoHS-critical designs.