PIC16C773T-I/SO - 8-bit OTP MCU 7KB ROM 22 I/O | Microchip
MPN: PIC16C773T-I/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $6.5 | $6.50 |
| 10 | $5.85 | $58.50 |
| 100 | $5.21 | $521.00 |
| 500 | $4.68 | $2,340.00 |
| 1,000 | $4.15 | $4,150.00 |
PIC16C773T-I/SO Overview
Key features include six channels of 12-bit Analog-to-Digital (A/D) conversion, three 8-bit timers plus one 16-bit timer, a Universal Synchronous Asynchronous Receiver Transmitter (USART) with address detection, a Master Synchronous Serial Port (SSP) supporting SPI and I2C, and 35 single-word instructions for simplified programming. The T-suffix variant ships on tape-and-reel, while the I-suffix industrial temperature grade spans -40 C to +85 C.
The PIC16C773T-I/SO uses Microchip's 8-bit Harvard architecture with separate program and data buses, allowing concurrent instruction fetch and operand access. The OTP EPROM cell technology enables prototype and small-volume manufacturing flows, while the wide operating range, on-chip peripherals, and 22 high-current I/O make it well-suited for mixed-signal embedded control tasks.
Typical applications include industrial process control with analog sensor inputs, instrumentation and data acquisition front ends, motor control subsystems, white-goods and HVAC control boards, and low-cost consumer embedded products. The combination of 12-bit ADC precision and USART connectivity suits SCADA terminals and remote telemetry.
When designing with this part, populate the configuration fuses correctly for oscillator selection, watchdog timer, and code protection. Plan OTP programming into the manufacturing flow, and confirm that the required 12-bit ADC performance is achievable given input-impedance and acquisition-time constraints.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an information-gain asset for component selection.
Drop-in alternatives for PIC16C773T-I/SO β 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 PIC16C773T-I/SO (same form factor and footprint) β differing in ADC, Architecture, Operating Temperature, Package, Program Memory Size.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C773-I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C773T-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16C773T-E/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C773T/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C773-I/SS
β Drop-Inβ In Stock
$7 / Unit
View Datasheet βPIC16C773T-I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C773T-I/SO Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC16C7xx RISC (Harvard) |
| Instruction Set | 35 single-word instructions |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) |
| Data RAM | 256 bytes |
| Maximum Clock Speed | 20 MHz |
| Instruction Execution Time | 200 ns at 20 MHz |
| Supply Voltage | 4.0 V to 5.5 V |
| Digital I/O Pins | 22 |
| ADC | 6 channels x 12-bit |
| Timers | 3 x 8-bit + 1 x 16-bit |
| Serial Interfaces | USART (SCI), SSP (SPI / I2C) |
| Package | 28-SOIC (0.295 in / 7.50 mm width) |
| Operating Temperature | -40 C to +85 C (industrial, I grade) |
| Mounting Type | Surface Mount (Gull-Wing) |
| RoHS Status | Compliant |
PIC16C773T-I/SO Pin Configuration
| Pin 1 | MCLR/VPP β Master Clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 β PORTA bit 0 / analog input 0 |
| Pin 3 | RA1/AN1 β PORTA bit 1 / analog input 1 |
| Pin 4 | RA2/AN2 β PORTA bit 2 / analog input 2 |
| Pin 5 | RA3/AN3/VREF β PORTA bit 3 / analog input 3 / ADC VREF+ |
| Pin 6 | RA4/T0CKI β PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS β PORTA bit 5 / analog input 4 / SSP slave select |
| Pin 8 | AVSS β Analog ground |
| Pin 9 | AVDD β Analog positive supply |
| Pin 10 | VSS β Digital ground |
| Pin 11 | VDD β Digital positive supply |
| Pin 12 | OSC2/CLKOUT β Oscillator crystal / clock output |
| Pin 13 | OSC1/CLKIN β Oscillator crystal / external clock input |
| Pin 14 | RC0/T1OSO/T1CKI β PORTC bit 0 / Timer1 oscillator out / clock in |
| Pin 15 | RC1/T1OSI/CCP2 β PORTC bit 1 / Timer1 oscillator in / CCP2 |
| Pin 16 | RC2/CCP1 β PORTC bit 2 / CCP1 PWM output |
| Pin 17 | RC3/SCK/SCL β PORTC bit 3 / SSP SPI clock / I2C clock |
| Pin 18 | RC4/SDI/SDA β PORTC bit 4 / SSP SPI data in / I2C data |
| Pin 19 | RC5/SDO β PORTC bit 5 / SSP SPI data out |
| Pin 20 | RC6/TX/CK β PORTC bit 6 / USART TX / clock |
| Pin 21 | RC7/RX/DT β PORTC bit 7 / USART RX / data |
| Pin 22 | RD0 β PORTD bit 0 |
| Pin 23 | RD1 β PORTD bit 1 |
| Pin 24 | RD2 β PORTD bit 2 |
| Pin 25 | RD3 β PORTD bit 3 |
| Pin 26 | RD4 β PORTD bit 4 |
| Pin 27 | RD5 β PORTD bit 5 |
| Pin 28 | RD6 β PORTD bit 6 |
Typical Applications
PIC16C773T-I/SO is suitable for 7 applications: Industrial Process Control with Analog Sensor Inputs, Instrumentation and Data Acquisition Front Ends, Motor Control Subsystems, White-Goods and HVAC Control Boards, Low-Cost Consumer Embedded Products, Remote Telemetry and SCADA Terminals, Automotive Cabin and Body Electronics.
Industrial Process Control with Analog Sensor Inputs
The PIC16C773T-I/SO fits industrial process-control front ends because its 6 channels of 12-bit ADC deliver the resolution needed for thermocouple, RTD, and 4-20 mA loop signal conditioning. Its 4.0 V to 5.5 V supply tolerates the noisy 24 V industrial bus after regulation. The 20 MHz core and USART enable local-loop PID calculation plus SCADA telemetry in the same part. With 22 digital I/O pins, the MCU can drive relays, optocouplers, and HMI keypads alongside analog acquisition. The OTP-only programming flow suits high-volume OEM deployments where firmware lock-in is acceptable.
Recommended
Instrumentation and Data Acquisition Front Ends
For benchtop and rack-mounted instrumentation, the PIC16C773T-I/SO provides 12-bit ADC accuracy that is sufficient for multi-channel data loggers measuring strain gauges, load cells, and pressure transducers. The SSP supporting both SPI and I2C simplifies interface to external EEPROM for data buffering and to LCD controllers for local display. Its -40 C to +85 C industrial temperature range covers laboratory, factory-floor, and outdoor enclosures. The 35-instruction RISC core enables deterministic sampling loops that maintain ADC accuracy across temperature swings.
Recommended
Motor Control Subsystems
The PIC16C773T-I/SO is well-suited for low-cost brushed DC and stepper motor controllers where the 16-bit timer drives PWM generation, and the 12-bit ADC reads back current-sense amplifiers. With 22 I/O pins, the MCU can simultaneously control two H-bridges, monitor end-stop switches, and report status via USART. The 200 ns instruction execution supports sub-microsecond PWM updates for smooth torque control. Industrial temperature operation makes the part reliable under the thermal stress of motor-driver heatsinks.
Recommended
White-Goods and HVAC Control Boards
The PIC16C773T-I/SO supports washer, dryer, dishwasher, and HVAC control boards where 12-bit ADC reads thermistors, pressure transducers, and humidity sensors; the USART interfaces to inverter main-control boards. Its OTP memory prevents end-user firmware tampering, satisfying white-goods OEM requirements for locked control algorithms. The 28-SOIC package is widely accepted by appliance EMS partners with established lead-free reflow lines. Industrial temperature operation ensures long-term reliability in hot mechanical compartments.
Recommended
Low-Cost Consumer Embedded Products
For toys, home automation accessories, and personal-care appliances, the PIC16C773T-I/SO delivers the right blend of analog inputs, PWM timers, and serial interfaces at low cost. Its 7 KB OTP supports moderately complex user-interface logic and small communication stacks. With 22 I/O pins, designers can directly drive LED arrays, keypads, and buzzer drivers without external logic. The Microchip PIC ecosystem - including MPLAB-X, MPASM, and ICD debug - keeps firmware development and tool-chain investment low.
Recommended
Remote Telemetry and SCADA Terminals
SCADA outstations and remote telemetry units benefit from the PIC16C773T-I/SO's 12-bit ADC for transducer digitisation and USART for half-duplex modem communication. The SSP peripheral supports I2C sensors and SPI radio modules in a single design, reducing BOM cost. Industrial temperature operation covers outdoor cabinet installations. The 35-instruction PIC core enables efficient Modbus RTU framing with minimal firmware overhead, while the 4.0 V to 5.5 V supply accommodates solar-charged battery rails after regulation.
Recommended
Automotive Cabin and Body Electronics
For non-safety automotive subsystems - climate-control panels, mirror controllers, accessory modules - the PIC16C773T-I/SO delivers 12-bit ADC accuracy for ambient-light and temperature sensing plus USART for body-network communication. While not AEC-Q100 qualified, the industrial temperature grade suits cabin environments. The 28-SOIC footprint fits the space-constrained geometry typical of body-control modules. OTP memory prevents unauthorised firmware modifications, supporting OEM anti-tamper requirements for accessory electronics.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C773T-I/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C773-I/SO | PIC16C773T-I/SS | PIC16C773T-E/SO | PIC16C773T/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC (this variant uses SSOP) | 28-SOIC - same | 28-SOIC - same |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
| Program Memory Size | 7 KB (4K x 14) | 7 KB | 7 KB | 7 KB | 7 KB |
| Data RAM | 256 bytes | 256 bytes | 256 bytes | 256 bytes | 256 bytes |
| ADC | 6 x 12-bit | 6 x 12-bit | 6 x 12-bit | 6 x 12-bit | 6 x 12-bit |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Temperature Grade | Industrial (-40 C to +85 C) | Industrial | Industrial | Extended (-40 C to +125 C) | Commercial (0 C to +70 C) |
| Packaging Form | Tape & Reel | Tube | Tape & Reel (28-SSOP) | Tape & Reel | Tape & Reel (commercial temp) |
Key Differentiators
- Industry-standard 12-bit ADC vs older 8-bit family (vs PIC16C72T-I/SO)
- Re-programmable flash equivalent for development (vs PIC16F873A-I/SO)
- Industrial temperature grade ships stock (vs PIC16C773T-E/SO)
Design Notes
Estimated: with 20 MHz operation at 5 V, typical PIC16C773 core current is around 5-10 mA, plus I/O drive currents. Bulk decoupling needs at least 100 nF ceramic and 10 uF tantalum close to VDD/AVDD pins. The analog supply (pin 9, AVDD) must be tied to VDD, with AVSS tied to VSS; adding a ferrite bead between VDD and AVDD improves ADC noise by ~3-5 LSB. AVDD and AVSS separation matters because the 12-bit ADC shares these rails with digital logic.
Route the 20 MHz crystal traces symmetrically and short (less than 10 mm). Keep the OSC1/OSC2 pair away from high-current switching traces to avoid injected noise. The analog inputs AN0-AN4 should be guarded with a ground plane on both sides and not routed parallel to digital lines. Decoupling capacitors must be placed within 3 mm of their respective VDD/AVDD pins. Avoid running the MCLR reset trace near any switching node; add a 10 kohm pull-up and a 100 nF cap to ground on MCLR for noise immunity.
Do not assume OTP programming is reversible - the EPROM cells can only be programmed once and cannot be erased. Ensure firmware is fully validated before programming. Configuration fuses must be set explicitly; leaving them at default can disable the MCLR pin or select wrong oscillator mode. The 12-bit ADC requires adequate acquisition time - reference the ACQT bits in ADCON1 and Tad timing. Be aware that the I2C module on PIC16C7xx is the legacy peripheral with limited slew-rate control.
Compliance Information
RoHS compliant per Microchip product declaration. Not AEC-Q100 qualified - not recommended for automotive safety-critical applications. Industrial temperature grade -40 C to +85 C suitable for factory automation and white-goods.
