PIC16C771T-E/SS - 8-Bit 20MHz MCU, 7KB OTP, 20-SSOP | Microchip
MPN: PIC16C771T-E/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.42 | $34.20 |
| 100 | $2.95 | $295.00 |
| 500 | $2.58 | $1,290.00 |
| 1,000 | $2.22 | $2,220.00 |
PIC16C771T-E/SS Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, program memory, data RAM, and peripherals into a single package optimized for embedded control. PIC microcontrollers use a Harvard RISC architecture with a small instruction set (35 single-word instructions for the PIC16C family), making them easy to program in assembly or C. The PIC16C series sits within the broader microcontroller taxonomy: PIC16C -> PIC16 family -> 8-bit PIC -> microcontroller -> integrated circuit -> semiconductor. OTP (One-Time-Programmable) memory is programmed once and cannot be erased, which lowers unit cost compared to flash-based MCUs but eliminates field reprogrammability.
Key features of the PIC16C771 include 6 channels of 12-bit A/D conversion enabling precision sensor interfacing, plus dedicated I2C and SPI communication peripherals for connecting to external sensors, EEPROMs, and displays. The device also integrates a PWM module, a Watchdog Timer (WDT), Brown-out Reset (BOR), and Power-on Reset (POR) for robust operation in noisy industrial environments. The industrial -40C to +125C operating temperature range supports deployment in harsh factory and automotive under-hood applications.
Architecturally, the PIC16C771 is pin-compatible with the PIC16C770 and PIC16C7XX family and is upwards compatible with the PIC16C5X and PIC12CXXX devices, preserving legacy code and PCB layouts. The PIC16C core uses a 14-bit instruction word with a 35-instruction RISC set and a 200 ns minimum instruction cycle at 20 MHz, providing predictable deterministic timing for real-time control loops.
Typical applications include industrial sensor signal conditioning, closed-loop motor control, automotive sensor interfaces, multi-channel data acquisition front-ends, and embedded mixed-signal consumer products. Its low pin count and integrated ADC make it attractive for cost-sensitive 5 V designs where a small footprint and minimal external components are required.
When designing with the PIC16C771T-E/SS, note that OTP memory cannot be field-updated; plan firmware revision strategy accordingly and use the -E (Extended) temperature grade for industrial deployments. The 20-SSOP footprint matches several PIC16C7X family members, allowing PCB reuse across variants.
This page synthesizes distributor stock data, drop-in pin-compatible alternatives, and engineering notes that go beyond the manufacturer datasheet to support sourcing, replacement, and design decisions.
Drop-in alternatives for PIC16C771T-E/SS — 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 PIC16C771T-E/SS (same form factor and footprint) — differing in Package, Program Memory Size, ADC, Program Memory Type, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C771T/SS
✅ Drop-In✓ In Stock
$3.14 / Unit
View Datasheet →PIC16C771-E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C771T-E/SO
✅ Drop-In✓ In Stock
$4.61 / Unit
View Datasheet →PIC16C771-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C771T/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C771T-E/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Series | PIC® 16C |
| Instruction Set Width | 14-bit |
| Number of Instructions | 35 single-word |
| Maximum CPU Frequency | 20 MHz |
| Instruction Execution Time | 200 ns |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K × 14) |
| Data RAM | 256 bytes |
| Operating Voltage | 5 V |
| ADC | 12-bit, 6 channels |
| Communication Interfaces | I2C, SPI |
| PWM Modules | Yes |
| Watchdog Timer (WDT) | Yes |
| Brown-out Reset (BOR) | Yes |
| Power-on Reset (POR) | Yes |
| Operating Temperature | -40C to +125C (Industrial -E grade) |
| Package | 20-SSOP (0.209 inch, 5.30 mm body width) |
| Mounting Type | Surface Mount |
| Pin Count | 20 |
PIC16C771T-E/SS Pin Configuration
| Pin 1 | MCLR/Vpp — Master Clear (reset) input / Programming voltage input |
| Pin 2 | RA0/AN0 — PORTA bit 0 / Analog input channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / Analog input channel 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / Analog input channel 2 |
| Pin 5 | RA3/AN3/VREF+ — PORTA bit 3 / Analog input channel 3 / ADC positive voltage reference |
| Pin 6 | RA4/AN4 — PORTA bit 4 / Analog input channel 4 |
| Pin 7 | RA5/AN5/SS — PORTA bit 5 / Analog input channel 5 / SPI Slave Select |
| Pin 8 | OSC1/CLKIN — Oscillator crystal input / External clock input |
| Pin 9 | OSC2/CLKOUT — Oscillator crystal output / Clock output |
| Pin 10 | RC0/T1OSO — PORTC bit 0 / Timer1 oscillator output |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / Capture-Compare-PWM 2 |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / Capture-Compare-PWM 1 |
| 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 — PORTC bit 6 |
| Pin 17 | RC7 — PORTC bit 7 |
| Pin 18 | RB0/INT — PORTB bit 0 / External interrupt input |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage (5 V) |
Typical Applications
PIC16C771T-E/SS is suitable for 6 applications: Industrial Sensor Signal Conditioning, Closed-Loop Motor Control, Automotive Sensor Interface Module, Multi-Channel Data Acquisition Front-End, Embedded Mixed-Signal Consumer Products, Industrial Process Control Loop Controller.
Industrial Sensor Signal Conditioning
The PIC16C771T-E/SS is well suited for multi-channel industrial sensor signal conditioning front-ends. Its 6-channel 12-bit ADC provides 4096 codes of resolution, enabling direct interfacing with thermocouples, RTDs, strain gauges, and 4-20 mA loop transmitters after external signal conditioning. The 5 V single-supply operation simplifies analog front-end design, while the integrated I2C and SPI peripherals connect to digital temperature sensors, EEPROM calibration memory, and isolated communication transceivers. The -40C to +125C industrial temperature range supports deployment in factory floor PLC I/O modules, process transmitters, and SCADA remote terminal units. Real-time control loops are served by the 200 ns instruction execution time, deterministic 35-instruction RISC core, and dedicated PWM module for excitation or heater drive.
Recommended
Closed-Loop Motor Control
For small brushed DC motor, solenoid, or valve actuator control, the PIC16C771T-E/SS provides the required deterministic PWM generation and ADC feedback sampling in a single 20-SSOP chip. The PWM module generates drive signals for MOSFET H-bridges or half-bridges while the 12-bit ADC samples current shunt, back-EMF, or position feedback signals. The 20 MHz CPU clock allows 10 kHz PWM frequency with 10-bit resolution while still servicing the control loop and serial diagnostics. Brown-out Reset and Watchdog Timer protect against motor-induced supply glitches common in industrial cabled environments. The compact 20-SSOP footprint fits within the tight PCB constraints of integrated motor controller PCBs, while the industrial -E temperature grade supports under-hood automotive and outdoor equipment operation.
Recommended
Automotive Sensor Interface Module
Automotive sensor interface modules benefit from the PIC16C771T-E/SS combination of 12-bit ADC precision, industrial temperature range, and integrated I2C/SPI peripherals. The device can directly read automotive sensors such as MAP, MAF, throttle position, and oil pressure transducers while communicating with the vehicle ECU over SPI or LIN-transceiver-assisted UART. The 256-byte RAM accommodates calibrated lookup tables and moving-average filters for noise rejection on noisy automotive power rails. The 5 V supply rail matches standard automotive sensor conditioning. The OTP memory configuration provides per-vehicle calibration data without field reprogrammability concerns. Watchdog Timer and Brown-out Reset ensure recovery from load-dump transients and crank-cold-start voltage drops that are common in 12 V automotive electrical systems.
Recommended
Multi-Channel Data Acquisition Front-End
Multi-channel data acquisition front-ends for instrumentation, environmental monitoring, and laboratory equipment are well served by the PIC16C771T-E/SS. The 6-channel 12-bit ADC sequentially samples analog inputs at rates up to approximately 50 ksps when configured for sequential conversion, sufficient for vibration, temperature, and pressure monitoring channels. The I2C peripheral connects to external 24-bit delta-sigma ADCs for higher-precision channels when required, while the SPI bus drives LCD displays and external DAC outputs. The 7 KB OTP program memory holds calibration tables, linearization polynomials, and Modbus or proprietary communication protocol stacks. The compact 20-SSOP package suits space-constrained DIN-rail mounted DAQ modules and panel meters, while the -40C to +125C industrial temperature rating supports outdoor and process plant installation.
Recommended
Embedded Mixed-Signal Consumer Products
Cost-sensitive embedded mixed-signal consumer products such as small appliances, HVAC zone controllers, and battery chargers benefit from the PIC16C771T-E/SS single-chip integration. The 12-bit ADC monitors battery voltage, charge current, temperature, and user potentiometer inputs. The PWM module drives power converter switches, LED indicators, or buzzer tones. The I2C bus connects to user-interface keypads, character LCD displays, and external RTC chips. The 5 V single-supply operation aligns with USB-powered and wall-adapter applications. OTP memory keeps unit cost low for high-volume consumer products where firmware is finalized. The 20-SSOP footprint enables compact PCB layouts inside small enclosures, while the Watchdog Timer and Brown-out Reset protect against consumer-side power quality issues such as brownouts during AC line transients.
Recommended
Industrial Process Control Loop Controller
Standalone industrial process control loop controllers for PID temperature, pressure, and flow regulation leverage the PIC16C771T-E/SS as a single-chip control platform. The 12-bit ADC reads the process variable from RTDs, thermocouples, or 4-20 mA transmitters through external signal conditioning. The PWM output drives solid-state relays, heater SSR firing, or proportional valves. The 35-instruction RISC core executes fixed-point PID control loops within the 200 ns instruction cycle, supporting update rates above 1 kHz when required. The I2C bus interfaces to local keypads, displays, and configuration EEPROMs storing tuning parameters. The industrial -40C to +125C temperature rating supports deployment in unheated control cabinets and outdoor instrumentation enclosures, while the Watchdog Timer prevents lockup in unattended remote installations.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C771T-E/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C771T/SS | PIC16C771-E/SS | PIC16C771-I/SS | PIC16C771T-E/SO | PIC16C771T/SO |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SOIC - different footprint | 20-SOIC - different footprint |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| ADC Resolution / Channels | 12-bit / 6 channels | 12-bit / 6 channels | 12-bit / 6 channels | 12-bit / 6 channels | 12-bit / 6 channels | 12-bit / 6 channels |
| Temperature Grade | -40C to +125C (Industrial -E) | 0C to +70C (Commercial) | -40C to +125C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Industrial -E) | 0C to +70C (Commercial) |
| Data RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| Packaging Format | Tape & Reel | Tape & Reel | Tube | Tape & Reel | Tape & Reel | Tape & Reel |
Key Differentiators
- Industrial -E temperature grade with -40C to +125C range (vs PIC16C771T/SS)
- 20-SSOP compact footprint for space-constrained designs (vs PIC16C771T-E/SO)
- Tape & Reel packaging for high-volume SMT assembly (vs PIC16C771-E/SS)
Design Notes
The PIC16C771T-E/SS operates from a single 5 V supply on pin 20 (VDD) with ground on pin 19 (VSS). Place a 100 nF decoupling capacitor as close as possible to the VDD pin and a 10 uF bulk capacitor on the supply rail. For noisy industrial environments, add a ferrite bead or LC pi-filter between the 5 V rail and VDD to suppress conducted EMI from motor or relay switching transients. The Brown-out Reset circuit triggers when VDD drops below approximately 4.0 V, preventing code execution from corrupted memory.
Connect a 20 MHz fundamental-mode crystal between pins 8 (OSC1) and 9 (OSC2) with 15-33 pF loading capacitors to ground on each side. For cost-sensitive designs, the internal RC oscillator option eliminates the crystal but reduces timing accuracy. When using an external clock source, drive OSC1 with a CMOS-level signal and leave OSC2 floating. Avoid routing high-frequency switching signals near the oscillator pins to prevent clock jitter that would disrupt the deterministic 200 ns instruction timing.
Because the PIC16C771 uses One-Time Programmable (OTP) memory, firmware must be fully verified before production programming. Use the -JW windowed ceramic package variant (PIC16C771-04/JW) or the flash-based PIC16F877 for development and code iteration, then transfer the finalized HEX file to OTP PIC16C771 for production. MCLR/Vpp (pin 1) requires 13 V typical during ICSP programming; ensure the production PCB can isolate the MCLR pull-up during programming or use a programming header.
Estimated: total current consumption at 5 V, 20 MHz with all peripherals active is approximately 20 mA, but ADC conversion adds another 1-2 mA. Do not exceed the absolute maximum VDD of 7.0 V. The MCLR pin must not be left floating - tie to VDD through a 10 kohm pull-up. Analog inputs AN0-AN5 used as digital I/O must be configured with the appropriate TRISA bits; ADC channel selection does not auto-switch the pin to analog mode. Brown-out Reset must be enabled in the configuration word for reliable industrial operation.
Compliance Information
RoHS compliant per Microchip product page and Abacus Technologies listing. Not AEC-Q100 qualified - the PIC16C771 family is general-purpose industrial, not automotive-qualified. Lead-free packaging per Microchip datasheet. Halogen-free status not explicitly stated in provided data.
