PIC16C62A-20/SO - 8-Bit 20MHz CMOS OTP MCU, 3.5KB EPROM | Microchip
MPN: PIC16C62A-20/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $9.85 | $9.85 |
| 10 | $8.92 | $89.20 |
| 100 | $7.85 | $785.00 |
| 500 | $6.74 | $3,370.00 |
| 1,000 | $5.62 | $5,620.00 |
PIC16C62A-20/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer built around an 8-bit data path, integrating a CPU core, program memory (ROM/EPROM/Flash), working RAM, and peripherals. PIC microcontrollers use a Harvard RISC architecture with a small instruction set of 35 single-word instructions and a two-stage pipeline, allowing most instructions to execute in one oscillator cycle. They sit within the hierarchy: microcontroller -> embedded processor -> integrated circuit -> semiconductor, and are widely used in cost-sensitive, low-power embedded control.
Key features of the PIC16C62A include fully static operation, low supply current of ~15 μA at 5 V/4 MHz and ~1 μA at 3 V/32 kHz typical, an external oscillator interface, and brown-out / power-on reset support typical of the PIC16C6X family. The wide-body 28-SOIC package (0.295 in / 7.50 mm width) gives stronger thermal performance and easier hand-soldering than the narrow-body variant, which is useful for legacy industrial equipment, instrumentation, and hobby retrofits.
Architecturally, the device uses an enhanced mid-range PIC16 core with separate program and data buses, hardware multiplier-free instruction set, and a 14-bit wide program word for compact code density. Its peripherals include timers, a synchronous/asynchronous serial port (SSP), capture/compare/PWM, and analog comparators on selected family members, mapped onto the 22 I/O pins through the standard PIC peripheral library. The static design also lets the clock be stopped without losing register state, which is essential for battery-backed or sleep-dominated designs.
Typical applications include legacy industrial control boards, automotive interior subsystems (non-safety), appliance controllers, sensor signal processors, and retro/up-cycle designs that must match the original PIC16C6X footprint. The wide VDD range and small code footprint make it suitable for battery-powered data loggers and remote sensor nodes. Because the program memory is OTP/EPROM, the part is aimed at volume production where field reprogramming is not required.
When designing with this part, verify that any required peripherals (UART, ADC, PWM channels) are present on this exact silicon revision, as PIC16C62A and PIC16C62 differ in peripheral count. Decouple VDD with a 100 nF ceramic plus a 10 μF bulk cap placed within 5 mm of the supply pin, and route MCLR through the recommended resistor-capacitor reset network.
This page synthesizes distributor pricing, lifecycle status, drop-in alternatives in the same 28-SOIC footprint, and practical design notes that are not collated in the original PIC16C6X datasheet.
Drop-in alternatives for PIC16C62A-20/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 PIC16C62A-20/SO (same form factor and footprint) — differing in RAM Size, Program Memory Size, MSL Level, Oscillator Type, Communication Interfaces.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C62A-10/SO
✅ Drop-In✓ In Stock
$4.92 / Unit
View Datasheet →PIC16C62A-20I/SO
✅ Drop-In✓ In Stock
$6.2 / Unit
View Datasheet →PIC16C62AT-20/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C62A-04E/SO
✅ Drop-In✓ In Stock
$4.75 / Unit
View Datasheet →PIC16C62A-04I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C62A-20/SO Maximum Ratings & Electrical Characteristics
| Core Processor | PIC16 (8-bit RISC, 14-bit instruction word) |
| Program Memory Size | 3.5 KB (2K x 14) OTP EPROM |
| RAM Size | 128 x 8 bytes (128 bytes) |
| Number of I/O Lines | 22 |
| Maximum Clock Speed | 20 MHz |
| Supply Voltage (VDD) | 2.5 V to 6.0 V |
| Operating Temperature (Commercial) | 0C to +70C |
| Oscillator Type | External |
| Package / Case | 28-SOIC wide body, 7.50 mm width |
| Mounting Type | Surface Mount |
| Data Bus Width | 8-bit |
| Instruction Set | 35 single-word instructions |
| Typical Supply Current (5V, 4MHz) | 15 uA typical |
| Typical Supply Current (3V, 32kHz) | 1 uA typical |
| Program Memory Type | OTP EPROM |
| RoHS Status | Non-compliant (Pb-containing Sn/Pb finish - legacy OTP MCU) |
| MSL Level | 1 (unlimited floor life, surface mount) |
PIC16C62A-20/SO Pin Configuration
| Pin 1 | RA2 — PORTA bit 2 (digital I/O, also analog input) |
| Pin 2 | RA3 — PORTA bit 3 (digital I/O, also analog input) |
| Pin 3 | RA4 — PORTA bit 4 (digital I/O, also T0CKI timer clock input) |
| Pin 4 | RA5 — PORTA bit 5 (digital I/O, also analog input) |
| Pin 5 | GND — Ground reference |
| Pin 6 | RB0/INT — PORTB bit 0 / external interrupt input |
| Pin 7 | RB1 — PORTB bit 1 (digital I/O) |
| Pin 8 | RB2 — PORTB bit 2 (digital I/O) |
| Pin 9 | RB3 — PORTB bit 3 (digital I/O) |
| Pin 10 | RB4 — PORTB bit 4 (digital I/O, interrupt-on-change) |
| Pin 11 | RB5 — PORTB bit 5 (digital I/O, interrupt-on-change) |
| Pin 12 | RB6 — PORTB bit 6 (digital I/O, interrupt-on-change) |
| Pin 13 | RB7 — PORTB bit 7 (digital I/O, interrupt-on-change) |
| Pin 14 | VDD — Positive supply voltage (2.5V-6.0V) |
| Pin 15 | RC0 — PORTC bit 0 (digital I/O) |
| Pin 16 | RC1 — PORTC bit 1 (digital I/O) |
| Pin 17 | RC2 — PORTC bit 2 (digital I/O, also CCP1 output) |
| Pin 18 | RC3 — PORTC bit 3 (digital I/O, also SCK/SCL) |
| Pin 19 | RC4 — PORTC bit 4 (digital I/O, also SDI/SDA) |
| Pin 20 | RC5 — PORTC bit 5 (digital I/O, also SDO) |
| Pin 21 | RC6 — PORTC bit 6 (digital I/O, also TX/CK) |
| Pin 22 | RC7 — PORTC bit 7 (digital I/O, also RX/DT) |
| Pin 23 | RA0 — PORTA bit 0 (digital I/O, also analog input) |
| Pin 24 | RA1 — PORTA bit 1 (digital I/O, also analog input) |
| Pin 25 | MCLR/VPP — Master clear reset / programming voltage input |
| Pin 26 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Pin 27 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 28 | VDD — Positive supply voltage (2.5V-6.0V, redundant supply pin) |
Typical Applications
PIC16C62A-20/SO is suitable for 6 applications: Legacy Industrial Control Boards, Automotive Interior Subsystems (Non-Safety), Appliance Controllers and White Goods, Sensor Signal Processors and Data Loggers, Retrofit and Legacy Board Replacement, Educational and Hobby Electronics Projects.
Legacy Industrial Control Boards
The PIC16C62A-20/SO is widely deployed in legacy industrial control boards that were designed in the late 1990s around the PIC16C6X family. Its 20 MHz clock gives 5 MIPS instruction throughput, which is sufficient for PLC I/O scanning, motor starter sequencing, and conveyor control loops that do not require complex floating-point math. The 22 I/O lines map cleanly onto a typical 16-input/16-output industrial card, and the wide-body 28-SOIC footprint has been used on countless DIN-rail controllers, so the part is a proven direct fit. Replacement of failed boards on existing production lines is the primary use case, since the OTP EPROM means firmware must be verified against the original mask and the wide operating voltage range of 2.5-6.0 V tolerates the noisy 24 V industrial bus with simple regulation.
Recommended
Automotive Interior Subsystems (Non-Safety)
Inside automotive interior modules such as climate-control panels, seat-position memories, mirror-adjust controllers, and instrument-cluster backlight drivers, the PIC16C62A-20/SO has historically been used because of its compact 8-bit core, low 15 uA active current at 5 V/4 MHz, and wide 2.5-6.0 V supply range that survives crank-droop events on 12 V vehicle buses. With 22 programmable I/O lines it can multiplex switch scanning, LED driving, and serial links to a body controller without external glue logic. The commercial 0C to +70C temperature grade is the limitation; for under-hood or cabin-temperature extremes, the PIC16C62A-20I/SO industrial-grade variant is the appropriate substitution. Use cases are non-safety subsystems only, because the OTP EPROM and the part's NRND status make it unsuitable for new safety-critical designs.
Recommended
Appliance Controllers and White Goods
White-goods appliances such as washing machines, dishwashers, refrigerators, and microwave ovens are a classic application area for the PIC16C62A-20/SO because the OTP EPROM locks the firmware at production time, the 22 I/O lines can drive seven-segment displays, keypads, triac-fired heater relays, and door sensors directly, and the 20 MHz clock can handle triac zero-cross timing and PWM valve/motor control without external timers. The wide VDD tolerance accommodates rectified 5 V or 12 V supplies from cheap transformer-based power stages common in appliance design. Legacy replacement of EOL control boards in field-deployed appliances is the dominant use case; production of new white-goods is migrating to flash-based PIC16F1xx parts in the same 28-SOIC footprint.
Recommended
Sensor Signal Processors and Data Loggers
Battery-powered sensor nodes and remote data loggers use the PIC16C62A-20/SO's low power profile of just 1 uA typical at 3 V/32 kHz and the fully static design that allows the oscillator to be stopped in sleep mode while preserving register state. The 20 MHz top speed can wake on interrupt to perform fast ADC conversions, compensate the result, and transmit a packet before returning to sleep. The 128 bytes of SRAM is small but adequate for short sensor frames, and 22 I/O lines can scan a small matrix of thermistors, sense reed switches, and drive a low-power LCD or LED indicator. Field-deployed environmental monitors, weather stations, and metering retrofits are the primary applications.
Recommended
Retrofit and Legacy Board Replacement
The most common commercial use of PIC16C62A-20/SO today is board-level replacement in equipment whose firmware was locked into the OTP EPROM at original manufacture. Field service technicians, industrial refurbishment shops, and aerospace/military sustainment programs stock PIC16C62A-20/SO because the wide-body 28-SOIC footprint was used in thousands of legacy designs and exact drop-in parts avoid costly PCB rework. The NRND (Not Recommended for new designs) status means Microchip will not introduce next-generation wireless or analog peripherals on this part, but existing inventory continues to flow through the distributor channel. Cross-reference to PIC16C62A-10/SO or PIC16C62A-20I/SO is straightforward when stock is interrupted.
Recommended
Educational and Hobby Electronics Projects
Although superseded by flash-based PIC16F and PIC18 parts in modern curricula, PIC16C62A-20/SO still appears in vintage educational kits, university embedded-systems laboratories, and hobby retro-computing projects because of its simple PIC16C6X architecture with 35 single-word instructions and its easily obtainable 28-SOIC breakout boards. The 20 MHz clock is fast enough to teach UART, I2C, and bit-banged SPI, and the 22 I/O lines let students wire up simple robotic arms, line-following robots, and motor controllers. Hobbyists often migrate to the PIC16F84A or PIC16F628A later, but starting with PIC16C62A-20/SO teaches the original Harvard RISC concepts that underpin the entire PIC family.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62A-20/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62A-10/SO | PIC16C62A-20I/SO | PIC16C62AT-20/SO | PIC16C62A-04E/SO |
|---|---|---|---|---|---|
| Package | 28-SOIC (7.50 mm wide) | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same | 28-SOIC (7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Speed | 20 MHz | 10 MHz (-50%) | 20 MHz (same) | 20 MHz (same) | 4 MHz (-80%) |
| Program Memory | 3.5 KB (2K x 14) OTP EPROM | 3.5 KB OTP EPROM - same | 3.5 KB OTP EPROM - same | 3.5 KB OTP EPROM - same | 3.5 KB OTP EPROM - same |
| RAM Size | 128 bytes | 128 bytes - same | 128 bytes - same | 128 bytes - same | 128 bytes - same |
| I/O Pins | 22 | 22 - same | 22 - same | 22 - same | 22 - same |
| Operating Temperature | 0C to +70C (Commercial) | 0C to +70C - same | -40C to +85C (Industrial) | 0C to +70C - same | -40C to +125C (Extended) |
| Lifecycle Status | NRND (Not Recommended for new designs) | NRND | NRND | NRND | NRND |
| Supply Current (5V, 4MHz) | 15 uA typical | 15 uA typical - same | 15 uA typical - same | 15 uA typical - same | 15 uA typical - same |
Key Differentiators
- Higher maximum clock speed (20 MHz, 5 MIPS) vs the -10/SO grade (vs PIC16C62A-10/SO)
- Commercial temperature grade with widest distributor stock (vs PIC16C62A-20I/SO)
- Original commercial-grade OTP silicon, NRND (vs PIC16C62AT-20/SO)
Design Notes
Decouple VDD at pin 14 and pin 28 with a 100 nF ceramic capacitor placed within 5 mm of each supply pin, plus a 10 uF bulk capacitor on the board near the MCU. The PIC16C62A-20/SO has two VDD pins and they must both be connected; leaving one floating causes erratic brown-out behavior. For battery-powered designs, gate the bulk capacitor with a ferrite to limit inrush on cold-start at sub-zero temperatures.
Do not leave the MCLR/VPP pin (pin 25) floating - it must be tied to VDD through a 10 kohm resistor for normal operation, or driven by the reset supervisor. Floating MCLR is the single most common cause of spurious resets on PIC16C6X designs. If using an in-circuit debugger, the MCLR line must include the ICD isolation resistor network (typically 10 kohm in series with MCLR). OTP EPROM is one-time-programmable - verify the HEX file with a windowed JW part before committing to production.
Route the crystal traces between OSC1 (pin 27) and OSC2 (pin 26) short and symmetric, with the crystal load capacitors (typically 15-33 pF for 20 MHz) right at the pins. Keep the oscillator traces away from high-current switching nodes such as relay drivers or motor phases; noise coupling into OSC1 will manifest as instruction jitter or UART framing errors. For wide-body 28-SOIC hand-soldering, use a grounded tip and minimal thermal mass to avoid lifting pin-1 copper pads.
Compliance Information
RoHS non-compliant due to SnPb finish on legacy wide-body SOIC; Microchip lists part as NRND. Reach compliant per Abacus Technologies distributor listing. AEC-Q100 not qualified - for automotive, choose PIC16C62A-20I/SO industrial grade but still validate for the target automotive environment.
