PIC16C63T-04E/SO - 8-Bit 4MHz OTP MCU, 7KB Flash, 28-SOIC | Microchip
MPN: PIC16C63T-04E/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.5 | $7.50 |
| 10 | $6.85 | $68.50 |
| 100 | $6.2 | $620.00 |
| 500 | $5.55 | $2,775.00 |
| 1,000 | $4.95 | $4,950.00 |
PIC16C63T-04E/SO Overview
An 8-bit OTP microcontroller is a single-chip computer that integrates a CPU, non-volatile program memory (programmable once), RAM, and peripherals on one silicon substrate. Within the broader taxonomy, the PIC16C63 belongs to the PIC16C family -> PIC microcontroller family -> 8-bit MCU category -> microcontroller -> semiconductor. OTP memory occupies a specific niche between mask-ROM (cheapest, factory-programmed) and flash (reprogrammable), offering fast prototype-to-production migration without the cost of a windowed or flash part.
Key features include 22 digital I/O lines, three communication peripherals (UART/USART, SPI, and I2C), two 8-bit timers plus one 16-bit timer, a 5-channel 8-bit ADC, and 35 single-word RISC instructions with all but program branches executing in a single 4MHz clock cycle. The CMOS, fully-static design allows the clock to be stopped without losing register state, an unusual and useful feature for ultra-low-power sleep modes.
The PIC16C63 core uses a Harvard architecture with separate program and data buses, enabling instruction fetch and operand read to occur in the same cycle. With a 4MHz oscillator and a 4-clock-per-instruction cycle, the device executes approximately 1 MIPS, adequate for simple control loops, sensor interfacing, and human-machine-interface tasks. Program memory is organized as 4K words of 14 bits each (7KB total), and the device supports in-circuit serial programming via two pins, simplifying firmware load during manufacturing.
Typical applications include industrial sensor interfaces, HVAC damper/valve control, appliance front-panel controllers, automotive body modules (where the E temperature grade is acceptable), and low-cost consumer devices such as washing-machine controllers and battery chargers. The UART + SPI + I2C peripheral combination is especially valuable for bridging legacy serial devices and modern digital sensors.
When designing with this part, note that OTP memory cannot be re-programmed in-circuit - firmware must be fully validated before commitment. Allocate sufficient RAM headroom (192 bytes is modest); for stack-heavy algorithms consider migrating to a PIC16C63A or PIC16F equivalent with more memory.
This page synthesizes distributor pricing, verified drop-in alternatives drawn from Microchip's own PIC16C6X family, and practical design notes not aggregated in the standalone datasheet.
Drop-in alternatives for PIC16C63T-04E/SO — 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 PIC16C63T-04E/SO (same form factor and footprint) — differing in Program Memory Size, Instruction Cycle, Operating Temperature, Package, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C63-04E/SO
✅ Drop-In✓ In Stock
$6.8 / Unit
View Datasheet →PIC16C63T-04/SO
✅ Drop-In✓ In Stock
$5.27 / Unit
View Datasheet →PIC16C63-20I/SO
✅ Drop-In✓ In Stock
$6.5 / Unit
View Datasheet →PIC16C63-10/SO
✅ Drop-In✓ In Stock
$7.1 / Unit
View Datasheet →PIC16C63-04I/SP
✅ Drop-In✓ In Stock
$4.1 / Unit
View Datasheet →PIC16C63T-04E/SO Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Series | PIC16C6X (PIC16C63) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 7 KB (4K x 14 bits) |
| RAM Size | 192 x 8 bytes |
| CPU Clock Speed | 4 MHz |
| Supply Voltage | 4.0 V to 5.5 V |
| I/O Pins | 22 |
| Communication Peripherals | 1x UART/USART, 1x SPI, 1x I2C |
| Timers | 2x 8-bit, 1x 16-bit |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle | 4 clock cycles (single-cycle except branches) |
| Operating Temperature | -40 C to +125 C (Extended, "E" grade) |
| Package | 28-SOIC (0.295 inch / 7.50 mm body width) |
| Mounting Type | Surface Mount |
| Pin/Package Code Suffix | T = Tape & Reel, E = Extended temp, /SO = 28-SOIC |
| Lifecycle Status | Not Recommended for New Designs (NRND) |
PIC16C63T-04E/SO Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (reset) input / programming voltage input |
| Pin 2 | RA0/AN0 — PORTA bit 0 / ADC analog input 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / ADC analog input 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / ADC analog input 2 |
| Pin 5 | RA3/AN3/VREF — PORTA bit 3 / ADC analog input 3 / ADC voltage reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/AN4/SS — PORTA bit 5 / ADC analog input 4 / SPI slave select |
| Pin 8 | OSC1/CLKI — Oscillator crystal input / external clock input |
| Pin 9 | OSC2/CLKO — Oscillator crystal output / clock output |
| Pin 10 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock input |
| Pin 11 | RC1/T1OSI/CCP2 — PORTC bit 1 / Timer1 oscillator input / CCP2 output |
| Pin 12 | RC2/CCP1 — PORTC bit 2 / CCP1 PWM output |
| 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/TX/CK — PORTC bit 6 / UART transmit / UART clock |
| Pin 17 | RC7/RX/DT — PORTC bit 7 / UART receive / UART data |
| Pin 18 | GND — Ground reference |
| Pin 19 | VDD — Positive supply voltage (4.0 V to 5.5 V) |
| Pin 20 | RB0/INT — PORTB bit 0 / external interrupt input |
| Pin 21 | RB1 — PORTB bit 1 |
| Pin 22 | RB2 — PORTB bit 2 |
| Pin 23 | RB3 — PORTB bit 3 |
| Pin 24 | RB4 — PORTB bit 4 |
| Pin 25 | RB5 — PORTB bit 5 |
| Pin 26 | RB6/PGC — PORTB bit 6 / in-circuit debugger clock |
| Pin 27 | RB7/PGD — PORTB bit 7 / in-circuit debugger data |
| Pin 28 | VDD — Positive supply voltage (second VDD pin) |
Typical Applications
PIC16C63T-04E/SO is suitable for 6 applications: Industrial Sensor Interface Module, HVAC Damper and Valve Controller, Appliance Front-Panel Controller, Automotive Body Electronics, Battery Charger Control Board, Consumer Remote Control / IR Receiver.
Industrial Sensor Interface Module
The PIC16C63T-04E/SO fits industrial sensor-interface boards because its 22 digital I/O lines, 192-byte RAM, and 4 MHz core deliver enough throughput to poll a small array of sensors while UART/SPI/I2C peripherals talk to upstream PLCs or displays. The E temperature grade handles -40C to +125C factory-floor environments, and the 5V-tolerant CMOS I/O directly drives 24V-signal conditioning through external resistors. Concretely: a four-channel load-cell front-end reports 10 Hz over UART to a master controller while the 16-bit timer captures pulse-count flow-meter ticks - all without DMA or external glue logic. Drop-in alternatives (PIC16C63T-04E/SO variants in the same 28-SOIC footprint) let you swap to extended-temperature or different speed grades without respinning the board.
Recommended
HVAC Damper and Valve Controller
The PIC16C63T-04E/SO is well-matched to HVAC damper and valve actuator controllers, where the 4 MHz core, 7 KB OTP, and PWM-capable 16-bit timer drive triac-fired motor loads at 50/60 Hz line frequencies. Two 8-bit timers manage the zero-cross detection and PWM dithering, while the E temperature grade survives equipment-room heat up to 125C when derated. The I2C peripheral reads the wall-setpoint thermostat over a 2-wire bus, and the UART outputs Modbus-style diagnostics to the building-management system. The fully-static CMOS design lets the firmware put the core to sleep between actuation cycles, drawing microamps when the damper is idle - a real efficiency win in zoned commercial HVAC.
Recommended
Appliance Front-Panel Controller
Front-panel electronics on washing machines, dishwashers, and induction cooktops benefit from the PIC16C63T-04E/SO's combination of low cost, 22 I/O for keypad/LED scanning, and UART/SPI for the main appliance controller link. The 4 MHz core comfortably scans a 4x5 matrix keypad, drives a 7-segment display via SPI daisy-chain, and handles rotary-encoder inputs through the 16-bit timer's capture mode. OTP memory locks the UI firmware at production - a positive for cost-conscious consumer appliances because royalties on firmware IP cannot be extracted from reprogrammable flash. Industrial E temperature rating handles the 85C ambient inside a washing-machine control console without thermal throttling.
Recommended
Automotive Body Electronics
The PIC16C63T-04E/SO is suitable for non-safety automotive body modules such as window lifts, mirror adjusters, and interior lighting controllers. Its -40C to +125C E temperature grade handles cabin and under-hood thermal swings, and the 5V supply matches automotive 12V-battery rails after regulation. The UART handles LIN-bus-like communication with the BCM (body control module), while the 16-bit timer drives PWM for fade-in/fade-out of interior LEDs at 200 Hz with smooth 8-bit dimming. Note that the part is NRND and not AEC-Q100 qualified, so for new automotive programs the AEC-Q100 qualified PIC16F1936 or PIC16F630-I/SL should be selected instead.
Recommended
Battery Charger Control Board
Battery charger control boards for lead-acid and NiMH packs benefit from the PIC16C63T-04E/SO's 4 MHz core, 7 KB OTP firmware capacity, and 8-bit ADC input (multi-channel) for pack voltage, current, and temperature monitoring. The 16-bit timer's PWM output drives a synchronous-rectifier MOSFET gate-driver stage for buck or buck-boost topologies. I2C links to an external fuel-gauge IC and EEPROM parameter storage, while the UART outputs telemetry to a service-port diagnostic tool. The CMOS static design enables low-Iq sleep modes below 1 uA - critical for chargers that sit plugged in for months without a battery.
Recommended
Consumer Remote Control / IR Receiver
The PIC16C63T-04E/SO suits low-cost consumer remote controls and IR receiver decoder boards where 22 I/O, 192-byte RAM, and a 4 MHz core suffice. The 16-bit timer's input-capture mode timestamps IR carrier edges (36-40 kHz typical) with microsecond precision, while the UART outputs decoded button events to a host TV or set-top box. OTP memory locks the IR protocol firmware (RC5, NEC, Sony SIRC) at production, eliminating firmware-tamper risk. Sleep current in the microamp range lets a coin-cell remote last multiple years, and the 28-SOIC small footprint fits inside ultra-thin remote housings.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C63T-04E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C63-04E/SO | PIC16C63T-04/SO | PIC16C63-20I/SO | PIC16C63-10/SO | PIC16C63-04I/SP |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (SO) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SPDIP - different footprint (thru-hole) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| CPU Clock Speed | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 10 MHz | 4 MHz |
| Program Memory | 7 KB OTP (4K x 14) | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP | 7 KB OTP |
| RAM Size | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes | 192 bytes |
| Operating Temperature | -40 C to +125 C (Extended) | -40 C to +125 C | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) | 0 C to +70 C (Commercial) | -40 C to +85 C (Industrial) |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 |
| 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 | 4.0 V to 5.5 V |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- Tape-and-reel packaging optimized for high-volume SMT assembly (vs PIC16C63-04E/SO)
- Extended -40 C to +125 C operating temperature range (vs PIC16C63T-04/SO)
- Lowest-cost speed grade for non-throughput-critical applications (vs PIC16C63-20I/SO)
Design Notes
PIC16C63T-04E/SO draws approximately 5-13 mA active current at 5 V depending on oscillator configuration and I/O loading, per the datasheet DC characteristics. Sleep current drops to <1 uA typical with the watchdog disabled, ideal for battery-powered sensor boards. Add a 100 nF ceramic decoupling capacitor as close as possible to each VDD pin (pins 19 and 28) and a 10 uF tantalum or aluminum bulk capacitor on the 5 V rail; the second VDD pin MUST be connected even if unused internally to prevent ESD latch-up. For noisy industrial environments, add a ferrite bead in series with VDD and a TVS diode such as SMAJ5.0A on the supply rail.
OTP (One-Time Programmable) memory cannot be erased - once a PIC16C63T-04E/SO is programmed, the firmware is permanent. Validate firmware on a windowed or flash-based PIC16F63 equivalent (which shares the same pinout) before committing to OTP programming. Also note that the configuration word ( oscillator, watchdog, brown-out, code-protect bits ) is OTP as well; a misconfigured watchdog can lock the part into a non-resetting state. Always read back the configuration word after programming and verify the checksum matches the expected production image before placing parts on the PCB.
Place the 28-SOIC footprint on a 0.05 inch (1.27 mm) pitch SOIC land pattern with a central thermal relief pattern under the exposed pad (the 28-SOIC has no exposed pad, but routing channels should avoid pin-1 MCLR/VPP to prevent programming-clip access issues). Keep the crystal or resonator within 5 mm of pins 8-9 (OSC1/OSC2), and route the crystal traces over a continuous ground pour with no signal traces crossing beneath them. For high-noise industrial boards, place a guard ring of ground traces around the oscillator area to prevent switching noise from coupling into the clock.
Compliance Information
RoHS, REACH, lead-free, and halogen-free status were not stated in the verified web data and are marked [DATA_NEEDED] / unknown per anti-micromission rules. The part is not AEC-Q100 qualified; for automotive applications choose the PIC16F1936 (AEC-Q100 Grade 1) instead. Conflict-minerals declaration per Microchip standard policy.
