PIC16C774-I/PT - 8-Bit OTP MCU 20MHz 12-bit ADC | Microchip
MPN: PIC16C774-I/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $12.85 | $12.85 |
| 10 | $11.62 | $116.20 |
| 100 | $10.18 | $1,018.00 |
| 500 | $9.05 | $4,525.00 |
| 1,000 | $8.4 | $8,400.00 |
PIC16C774-I/PT Overview
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.
Drop-in alternatives for PIC16C774-I/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC16C774-I/PT (same form factor and footprint) — differing in Package, Program Memory Size, Timers, RAM Size, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16F877-I/PT
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C74B-20I/PT
✅ Drop-In✓ In Stock
$4.62 / Unit
View Datasheet →PIC16C74BT-04I/PT
✅ Drop-In✓ In Stock
$7.1 / Unit
View Datasheet →PIC16C67T-04I/PT
✅ Drop-In✓ In Stock
$7.9 / Unit
View Datasheet →PIC16C774-I/PT Maximum Ratings & Electrical Characteristics
| Family | PIC® 16C |
| Core | 8-bit RISC (Harvard architecture) |
| Maximum Clock Frequency | 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 |
| Supply Voltage | 4.0 V to 5.5 V |
| I/O Pins | 33 |
| Timers | Two 8-bit + one 16-bit |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | TQFP-44 (10x10 mm) |
| Mounting Type | Surface Mount |
| Watchdog Timer | Yes (independent on-chip RC) |
| Brown-out Reset | Yes |
| ICSP (In-Circuit Serial Programming) | Yes |
PIC16C774-I/PT Pin Configuration
| Pin 1 | MCLR/VPP — Master clear reset / programming voltage input |
| Pin 2 | OSC1/CLKIN — Oscillator crystal input / external clock in |
| Pin 3 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Pin 4 | VDD — Digital supply voltage |
| Pin 5 | VSS — Digital ground |
| Pin 6 | RA0/AN0 — Digital I/O / analog input 0 |
| Pin 7 | RA1/AN1 — Digital I/O / analog input 1 |
| Pin 8 | RA2/AN2 — Digital I/O / analog input 2 |
| Pin 9 | RA3/AN3/VREF — Digital I/O / analog input 3 / ADC VREF+ |
| Pin 10 | RA4/AN4/T0CKI — Digital I/O / analog input 4 / Timer0 clock in |
| Pin 11 | AVDD — Analog supply voltage (ADC VREF+) |
| Pin 12 | AVSS — Analog ground (ADC VREF-) |
| Pin 13 | RA5/AN5/SS — Digital I/O / analog input 5 / SPI slave select |
| Pin 14 | RE0/RD/AN6 — Digital I/O / parallel port read / analog input 6 |
| Pin 15 | RE1/WR/AN7 — Digital I/O / parallel port write / analog input 7 |
| Pin 16 | RE2/CS/AN8 — Digital I/O / parallel port chip select / analog input 8 |
| Pin 17 | VDD — Digital supply voltage |
| Pin 18 | VSS — Digital ground |
| Pin 19 | OSC1/CLKIN — Oscillator crystal input / external clock in (alternate) |
| Pin 20 | OSC2/CLKOUT — Oscillator crystal output (alternate) |
| Pin 21 | RB0/INT — Digital I/O / external interrupt |
| Pin 22 | RB1 — Digital I/O |
| Pin 23 | RB2 — Digital I/O |
| Pin 24 | RB3 — Digital I/O |
| Pin 25 | RB4 — Digital I/O |
| Pin 26 | RB5 — Digital I/O |
| Pin 27 | RB6/PGC — Digital I/O / ICSP serial clock |
| Pin 28 | RB7/PGD — Digital I/O / ICSP serial data |
| Pin 29 | RC0 — Digital I/O |
| Pin 30 | RC1 — Digital I/O |
| Pin 31 | RC2 — Digital I/O |
| Pin 32 | RC3 — Digital I/O |
| Pin 33 | RC4 — Digital I/O |
| Pin 34 | RC5 — Digital I/O |
| Pin 35 | RC6 — Digital I/O |
| Pin 36 | RC7 — Digital I/O |
| Pin 37 | RD0 — Digital I/O |
| Pin 38 | RD1 — Digital I/O |
| Pin 39 | RD2 — Digital I/O |
| Pin 40 | RD3 — Digital I/O |
| Pin 41 | RD4 — Digital I/O |
| Pin 42 | RD5 — Digital I/O |
| Pin 43 | RD6 — Digital I/O |
| Pin 44 | RD7 — Digital I/O |
Typical Applications
PIC16C774-I/PT is suitable for 6 applications: 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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
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.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C774-I/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | 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) |
Key Differentiators
- Higher 12-bit ADC resolution vs PIC16C74B family (vs PIC16C74B-20I/PT)
- More ADC channels than PIC16F877 (vs PIC16F877-I/PT)
- Faster clock than PIC16C67 legacy (vs PIC16C67T-04I/PT)
Design Notes
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.
Compliance Information
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.
