PIC16C774-E/PT - 8-bit MCU 7KB OTP 33 I/O 12-bit ADC | Microchip
MPN: PIC16C774-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.92 | $8.92 |
| 10 | $8.1 | $81.00 |
| 100 | $7.21 | $721.00 |
| 500 | $6.45 | $3,225.00 |
| 1,000 | $5.74 | $5,740.00 |
PIC16C774-E/PT Overview
An 8-bit microcontroller (MCU) is a small, low-cost computer-on-a-chip that integrates a CPU, memory (ROM/RAM), and peripherals on a single silicon die. 8-bit MCUs sit at the entry tier of the microcontroller taxonomy: 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor device. They excel in deterministic, bit-level control tasks and remain widely deployed where cost, simplicity, and real-time responsiveness outweigh the throughput demands satisfied by 32-bit cores. The PIC16C774 series belongs to Microchip's mid-range PIC16 family, which uses a 14-bit instruction word and Harvard architecture.
Key features of the PIC16C774-E/PT include the 10-channel 12-bit ADC with up to 12 input channels (some shared with digital I/O), two 8-bit timers plus one 16-bit timer, a Universal Synchronous Asynchronous Receiver Transmitter (USART), a Synchronous Serial Port (SSP) supporting SPI and I²C, and a Capture/Compare/PWM (CCP) module. The device supports up to 20 MHz oscillator input and a 5 MIPS instruction throughput. Brown-out Reset (BOR), Power-on Reset (POR), and a Watchdog Timer with its own on-chip RC oscillator provide robust field reliability.
Architecturally, the PIC16C774 pairs a Harvard bus with a 14-bit-wide program memory path and an 8-bit data path, which keeps the instruction fetch and execution overlapping for predictable 200 ns cycle times at 20 MHz. The OTP memory allows one-time factory or in-circuit programming of code and constants, making the part well-suited to low-to-medium volume production runs where mask-ROM economics are unfavorable. The 12-bit ADC uses a successive-approximation register with sample-and-hold, and dedicated analog inputs can be multiplexed across the 33 I/O pins.
Typical applications include industrial process control loops, sensor signal conditioning, motor control front-ends, instrumentation data acquisition, automotive body electronics, and embedded control subsystems in medical and consumer appliances. The wide temperature range and 12-bit ADC precision particularly suit battery monitoring, multi-channel temperature scanning, and closed-loop analog control. In automotive body controllers, the same ADC bandwidth plus the USART links cleanly to LIN-based communication transceivers.
When designing with the PIC16C774-E/PT, observe the absolute maximum VDD of 7.5V and decouple VDD with a 0.1 µF ceramic capacitor placed within 5 mm of the supply pin. Configure unused I/O as outputs and tie them to ground to minimize ADC noise injection. The MCLR pin should be tied through a 10 kΩ pull-up to VDD, with a 100 nF cap to ground for ESD hardening. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, and practical design notes not found in the bare manufacturer datasheet.
Drop-in alternatives for PIC16C774-E/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-E/PT (same form factor and footprint) — differing in Package, Operating Temperature, Timers, Mounting Type, Program Memory Size.
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Request AlternativesPIC16C774-E/PT Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit RISC Microcontroller (MCU) |
| Program Memory Size | 7 KB OTP |
| RAM Size | 256 bytes |
| Number of I/O Pins | 33 |
| ADC Resolution | 12-bit |
| ADC Channels | 10 |
| Maximum CPU Frequency | 20 MHz |
| Instruction Throughput | 5 MIPS |
| Supply Voltage (VDD) | 2.5 V to 5.5 V |
| Operating Temperature | -40 °C to +125 °C (Extended, -E grade) |
| Package | 44-pin TQFP (PT) |
| Mounting Type | Surface Mount |
| Timers | 2 × 8-bit + 1 × 16-bit |
| Communication Interfaces | USART (SCI), SSP (SPI / I²C) |
| CCP Modules | 1 (Capture / Compare / PWM) |
| Reset / Protection | POR, BOR, Watchdog Timer with dedicated oscillator |
| Instruction Set Architecture | PIC16 mid-range, 14-bit instruction word, Harvard |
| Terminal Form | Gull Wing |
| Package Code | TQFP |
PIC16C774-E/PT Pin Configuration
| Pin 1 | MCLRbar/VPP — Master Clear (Reset) input / Programming voltage |
| 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/AN4/T0CKI — PORTA bit 4 / Analog input 4 / Timer0 clock |
| Pin 7 | RA5/AN5/SSbar — PORTA bit 5 / Analog input 5 / SPI Slave Select |
| Pin 8 | AVSS — Analog ground |
| Pin 9 | AVDD — Analog positive supply |
| Pin 10 | VSS — Digital ground |
| Pin 11 | VDD — Digital positive supply |
| Pin 12 | OSC1/CLKI — Crystal oscillator input / external clock |
| Pin 13 | OSC2/CLKO — Crystal oscillator output |
| Pin 14 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| Pin 15 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 |
| Pin 16 | RC2/CCP1 — PORTC bit 2 / Capture Compare PWM 1 |
| Pin 17 | RC3/SCK/SCL — PORTC bit 3 / SPI clock / I²C clock |
| Pin 18 | RD0 — PORTD bit 0 |
| Pin 19 | RD1 — PORTD bit 1 |
| Pin 20 | RD2 — PORTD bit 2 |
| Pin 21 | RD3 — PORTD bit 3 |
| Pin 22 | RD4 — PORTD bit 4 |
| Pin 23 | RD5 — PORTD bit 5 |
| Pin 24 | RD6 — PORTD bit 6 |
| Pin 25 | RD7 — PORTD bit 7 |
| Pin 26 | VSS — Digital ground |
| Pin 27 | VDD — Digital positive supply |
| Pin 28 | RB0/INT — PORTB bit 0 / External interrupt |
| Pin 29 | RB1 — PORTB bit 1 |
| Pin 30 | RB2 — PORTB bit 2 |
| Pin 31 | RB3 — PORTB bit 3 |
| Pin 32 | RB4 — PORTB bit 4 |
| Pin 33 | RB5 — PORTB bit 5 |
| Pin 34 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 35 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 36 | RC4/SDI/SDA — PORTC bit 4 / SPI data in / I²C data |
| Pin 37 | RC5/SDO — PORTC bit 5 / SPI data out |
| Pin 38 | RC6/TX/CK — PORTC bit 6 / USART TX / clock |
| Pin 39 | RC7/RX/DT — PORTC bit 7 / USART RX / data |
| Pin 40 | RE0/AN6 — PORTE bit 0 / Analog input 6 |
| Pin 41 | RE1/AN7 — PORTE bit 1 / Analog input 7 |
| Pin 42 | RE2/AN8/CS — PORTE bit 2 / Analog input 8 / Chip Select |
| Pin 43 | VDD — Digital positive supply |
| Pin 44 | VSS — Digital ground |
Typical Applications
PIC16C774-E/PT is suitable for 7 applications: Industrial Process Control, Multi-Channel Temperature Monitoring, Automotive Body Electronics, Battery Management Front-End, Sensor Hub and Data Acquisition, Medical Instrumentation Front-End, Embedded Control Subsystems in Consumer Appliances.
Industrial Process Control
The PIC16C774-E/PT is well-suited to industrial process-control loops where a closed-loop analog sensor (4-20 mA or 0-10 V) must be digitized for PID control of valves, pumps, or heaters. Its 12-bit ADC gives 4096 codes across a 0-5 V input, which yields roughly 1.2 mV LSB — enough resolution to detect sub-degree temperature drift on a Type K thermocouple amplifier. The 10 ADC channels allow multi-zone scanning of a single PLC front-end. The -E grade operating range of -40 °C to +125 °C supports cabinet-mounted or field-mounted industrial nodes without derating. Engineers typically pair the device with a 4N35 optocoupler on each digital output to provide 5 kV isolation from the mains-driven actuator. The 5 MIPS throughput and 14-bit instruction word keep PID math under 200 µs per loop, leaving headroom for housekeeping tasks such as EEPROM logging or HMI updates over RS-485 via the USART. Designed with the standard PIC16 mid-range peripheral set, it is firmware-compatible with the broader PIC16F87x family, easing migration if flash reprogrammability later becomes a requirement.
Recommended
Multi-Channel Temperature Monitoring
The PIC16C774-E/PT's 10-channel 12-bit ADC natively supports thermistor or RTD bridge scanning for HVAC, refrigeration, and battery-pack monitoring. At a 5 V reference and 12-bit resolution, the ADC delivers ~1.2 mV per LSB, which after a unity-gain thermistor divider yields better than 0.1 °C temperature resolution when paired with 10 kΩ NTC sensors. The 33 I/O pins let the MCU scan up to 10 analog zones while still driving status LEDs, I²C displays, and a UART link to a host controller. The extended -40 °C to +125 °C temperature grade matches automotive under-hood and industrial cold-storage envelopes without additional thermal screening. The ADC's acquisition time of approximately 19.7 µs at 20 MHz allows the entire 10-channel sweep to complete in well under 1 ms, leaving ample CPU time for moving-average filtering or alarm threshold checking. Designers typically add a 10 µF bulk + 0.1 µF ceramic bypass on AVDD to keep ADC readings stable in electrically noisy industrial cabinets.
Recommended
Automotive Body Electronics
The PIC16C774-E/PT's extended -40 °C to +125 °C operating range and 12-bit ADC make it a candidate for automotive body controllers, where it can read multiple sensor inputs (coolant, oil, ambient light, battery voltage) while driving PWM-controlled loads such as interior dimming or HVAC blend doors. With 33 I/O pins and a 5 MIPS CPU, the MCU can serve as a sub-node on a LIN or CAN bus, offloading simple control tasks from the central body control module. The USART links directly to a TJA1027 LIN transceiver or MCP2515 CAN controller with minimal glue logic. The 44-pin TQFP package is automotive-qualified in many Microchip part variants, though for full AEC-Q100 compliance a Q-grade suffix part is recommended. The OTP program memory protects against unauthorized firmware modification in field-deployed ECUs, an important consideration in automotive security. The Brown-out Reset and Watchdog Timer provide robust fault recovery on noisy 12 V vehicle buses when paired with a TVS-protected supply rail.
Recommended
Battery Management Front-End
In multi-cell battery management systems, the PIC16C774-E/PT can digitize individual cell voltages through a resistive divider ladder, providing per-cell state-of-charge telemetry to a host BMS controller. Its 12-bit ADC resolves 4.2 V lithium cell voltage into 1024 levels, giving roughly 4 mV resolution per cell — sufficient for coulomb-counting refinement and over-voltage detection. The 10 ADC channels handle a 7S to 10S battery pack on a single MCU, while the CCP module can drive cell-balancing MOSFETs via PWM duty-cycle control. The 2.5 V to 5.5 V supply range is well-matched to single-cell Li-ion derived rails after a low-dropout regulator. Brown-out Reset ensures clean restart after deep discharge events, and the Watchdog Timer recovers from software lock-ups caused by ESD or load-dump transients on the battery cable. For higher cell counts, multiple PIC16C774-E/PT nodes can be daisy-chained through the SSP port, scaling to 13S, 16S, or larger packs with minimal firmware effort.
Recommended
Sensor Hub and Data Acquisition
The PIC16C774-E/PT serves as a cost-effective sensor hub for factory-floor data acquisition nodes that aggregate 8-10 analog inputs and forward them over RS-485 or USB to a central SCADA server. The 12-bit ADC, sample-and-hold, and 33 I/O lines accommodate strain gauges, pressure transducers, flow meters, and 4-20 mA loop-powered sensors simultaneously. With the USART configured for RS-485, multi-drop addressing allows 32 nodes per bus using the standard Modbus RTU protocol. The 5 MIPS CPU executes a full 10-channel scan plus moving-average filter in well under 5 ms, lagging the typical 100 ms SCADA poll cycle by a comfortable margin. The 256-byte RAM is sufficient for input buffering and protocol state, and the 7 KB OTP holds the full Modbus stack plus application logic. The -40 °C to +125 °C temperature grade supports both indoor panel-mount and outdoor NEMA 4 enclosures with the same BOM.
Recommended
Medical Instrumentation Front-End
Although not a safety-critical medical MCU, the PIC16C774-E/PT is widely used in non-invasive medical instrument front-ends such as patient-side thermometry arrays, infusion pump auxiliary monitors, and laboratory spectrophotometers. Its 12-bit ADC provides enough resolution to digitize photodiode or thermopile outputs from low-level analog front-ends after a low-noise op-amp such as the MCP6002. The USART or SSP can stream digitized data to a higher-performance host processor that handles UI and connectivity. The OTP program memory ensures that clinical calibration constants and proprietary algorithms are locked at production time and cannot be field-tampered with. The 33 I/O pins comfortably drive a 4×4 keypad, an LCD interface, and several alarm outputs. Designers should add appropriate isolation barriers (e.g. ADuM1411) between the PIC16C774-E/PT and any mains-powered circuitry to meet IEC 60601 patient leakage requirements.
Recommended
Embedded Control Subsystems in Consumer Appliances
The PIC16C774-E/PT is a strong fit for the control subsystems of consumer appliances such as coffee machines, induction cooktops, and washing-machine sub-modules, where one MCU handles multiple analog sensor inputs (NTC temperature, water level, motor current sense) and several PWM or relay-driven loads. The 12-bit ADC delivers precise temperature readings from 100 kΩ NTC dividers, and the CCP module generates the PWM signals required for triac-fired heater elements or variable-frequency inverter control. The 33 I/O lines can drive a 7-segment display, capacitive touch buttons, and a buzzer simultaneously. The OTP memory locks the appliance firmware to a known version, deterring aftermarket tampering. For cost-sensitive consumer runs the 44-pin TQFP package footprints cleanly with Microchip's other mid-range parts, allowing single PCB layout reuse across multiple appliance variants.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C774-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C774-I/PT | PIC16C774-E/PQ | PIC16C774-I/PQ | PIC16C774/JW |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 44-pin TQFP (PT) | 44-pin TQFP (PT) | 44-pin MQFP (PQ) | 44-pin MQFP (PQ) | 44-pin TQFP (windowed ceramic) |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB UV-EPROM (windowed) |
| RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| ADC Resolution | 12-bit | 12-bit | 12-bit | 12-bit | 12-bit |
| Maximum CPU Frequency | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS | 20 MHz / 5 MIPS |
| Operating Temperature | -40 °C to +125 °C (E grade) | -40 °C to +85 °C (I grade) | -40 °C to +125 °C (E grade) | -40 °C to +85 °C (I grade) | 0 °C to +70 °C (development) |
| Supply Voltage | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V |
| I/O Pins | 33 | 33 | 33 | 33 | 33 |
| Reprogrammability | OTP (one-time) | OTP (one-time) | OTP (one-time) | OTP (one-time) | UV-erasable (windowed) |
Key Differentiators
- 12-bit ADC versus the 10-bit ADC of the PIC16F877A family (vs PIC16F877A-I/PT)
- Extended -E temperature grade versus the industrial -I grade (vs PIC16C774-I/PT)
- OTP code protection versus flash reprogrammability (vs PIC16F874A-I/PT)
Design Notes
Estimated: at 20 MHz / 5 MIPS operation from 5 V supply, the PIC16C774-E/PT draws roughly 5-8 mA active and 1-5 µA in sleep mode. Decouple each VDD pin (11, 27, 43) with a 100 nF ceramic capacitor placed within 5 mm of the pin, and add a 10 µF bulk tantalum or aluminum electrolytic near the highest-current VDD pin. Keep analog VDD separate from digital VDD at the IC by using a ferrite bead or 10 Ω resistor to isolate AVDD noise from the digital core. Source: PIC16C774 datasheet, electrical characteristics section.
Route the crystal traces (OSC1/OSC2, pins 12-13) as short as possible and surround them with a ground pour to minimize EMI pickup. Place the crystal load capacitors (typically 15-22 pF for an HS-mode crystal) within 2 mm of the OSC pins. Route analog input traces away from digital switching lines such as PWM outputs to avoid ADC crosstalk. Add a guard ring connected to analog ground around the analog input pins to shunt leakage currents away from high-impedance sensor nodes.
Do not exceed 5.5 V on VDD or apply voltage to any pin before VDD is stable, as the PIC16C774-E/PT has no internal power-on clamping on digital I/O. Always configure unused I/O as outputs and tie them to ground to minimize ADC input leakage (typical OFF-leakage is 1 µA which becomes significant for 1 MΩ source impedances). When using the ADC, ensure Aquisition time is at least 19.7 µs and add a 100 nF bypass cap directly on the VREF+ pin if used. Avoid leaving the MCLRbar pin floating - tie it to VDD through a 10 kΩ pull-up with a 100 nF cap to ground for ESD hardening.
Keep ICSP programming lines (PGC/RB6, PGD/RB7) free of series resistance greater than 100 Ω, and do not place capacitors on these pins as they can interfere with in-circuit programming. If isolation is required for production, use a dedicated programming header or test-pad access. Reserve a ground pad beneath the TQFP thermal pad (if applicable for this variant) and connect it to the ground plane with multiple vias to provide a low-impedance return path for switching currents.
Compliance Information
RoHS and lead-free status not stated in the verified web data; -G ordering suffix typically designates Pb-free finish for Microchip parts but full RoHS compliance should be confirmed via manufacturer declaration. Not AEC-Q100 qualified; for automotive applications request Q-grade parts from Microchip directly.