PIC16C62AT-20I/SS - 8-Bit OTP MCU, 3.5KB, 20MHz | Microchip
MPN: PIC16C62AT-20I/SS β Last Time Buy| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.46 | $34.60 |
| 100 | $3.05 | $305.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.46 | $2,460.00 |
PIC16C62AT-20I/SS Overview
What is a PIC microcontroller? A PIC (Peripheral Interface Controller) microcontroller is a small, low-power embedded computer on a single integrated circuit, combining a CPU, RAM, non-volatile program memory, and peripherals such as timers, ADC, comparators, and serial communication blocks. PIC microcontrollers sit within the broader category of microcontrollers (MCU) and 8-bit embedded processors, and they are widely used in industrial control, appliance, automotive, and consumer applications where deterministic behaviour and low cost matter more than raw compute.
Key features of the PIC16C62AT-20I/SS include 22 I/O pins, two 8-bit timers plus one 16-bit timer with capture/compare/PWM capability, a 5-channel 8-bit analog-to-digital converter (ADC), a USART/SCI serial port, an I2C/SPI-compatible Synchronous Serial Port (SSP), and a watchdog timer with its own on-chip RC oscillator for maximum reliability. The 14-bit instruction set provides 35 single-word instructions, and the device supports interrupt-driven operation with up to 10 interrupt sources.
The PIC16C62AT-20I/SS is built on a fully-static CMOS technology and uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access. Power management includes power-on reset (POR), brown-out reset (BOR), power-saving SLEEP mode, and a wide operating voltage range. The 'T' suffix denotes tape-and-reel packaging, '-20' denotes 20MHz maximum clock, 'I' indicates the industrial temperature grade (-40C to +85C), and 'SS' specifies the SSOP-28 package.
Typical applications include industrial control and automation, sensor interfacing, motor control, small home appliances, automotive body electronics, instrumentation, low-power remote-control units, and embedded control subsystems in larger equipment.
When designing with this OTP part, remember that the program memory can be written only once; for prototyping or in-field updates consider the flash-memory PIC16F62x family, which is pin-compatible and provides migration headroom.
This page synthesises distributor pricing, drop-in PIC16C family alternatives from the same SSOP-28 footprint, and engineering design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16C62AT-20I/SS 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 PIC16C62AT-20I/SS (same form factor and footprint) β differing in Package, Program Memory Type, RoHS Status, Timers, Watchdog Timer.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C62A-20I/SS
β Drop-Inβ In Stock
$1.8 / Unit
View Datasheet βPIC16C62AT-20I/SO
β Drop-Inβ In Stock
$2.65 / Unit
View Datasheet βPIC16C62B-20I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C622A-20I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F628A-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F88-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16C622AT-20I/SS
β Drop-Inβ In Stock
$1.18 / Unit
View Datasheet βPIC16C62AT-20I/SS Maximum Ratings & Electrical Characteristics
| Core | 8-bit PIC16 (Harvard) |
| Instruction Set | 14-bit, 35 instructions |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM | 128 bytes |
| Data EEPROM | Not present |
| Maximum CPU Frequency | 20 MHz |
| Supply Voltage (Vdd) | 2.5 V to 6.0 V |
| I/O Pins | 22 |
| Timers | 2 x 8-bit + 1 x 16-bit (CCP) |
| ADC | 5 channels, 8-bit |
| Serial Interfaces | USART/SCI + SSP (I2C/SPI) |
| Watchdog Timer | Yes (with on-chip RC) |
| Operating Temperature | -40C to +85C (Industrial) |
| Package | 28-SSOP (0.209", 5.30mm width) |
| Mounting Type | Surface Mount |
| RoHS Status | Non-compliant (contains Pb, OTP legacy family) |
PIC16C62AT-20I/SS Pin Configuration
| Pin 1 | RA2/AN2/VREF- β Port A bit 2 / ADC input 2 / ADC negative reference |
| Pin 2 | RA3/AN3/VREF+ β Port A bit 3 / ADC input 3 / ADC positive reference |
| Pin 3 | RA4/T0CKI β Port A bit 4 / Timer0 clock input (open-drain output) |
| Pin 4 | RA5/AN4/SS β Port A bit 5 / ADC input 4 / SPI slave select |
| Pin 5 | Vss β Ground reference |
| Pin 6 | OSC1/CLKIN β Oscillator crystal input / external clock in |
| Pin 7 | OSC2/CLKOUT β Oscillator crystal output / clock out |
| Pin 8 | RC0/T1OSO/T1CKI β Port C bit 0 / Timer1 oscillator output / Timer1 clock in |
| Pin 9 | RC1/T1OSI/CCP2 β Port C bit 1 / Timer1 oscillator input / CCP2 output |
| Pin 10 | RC2/CCP1 β Port C bit 2 / CCP1 PWM/capture input or output |
| Pin 11 | RC3/SCK/SCL β Port C bit 3 / SPI clock / I2C clock |
| Pin 12 | RC4/SDI/SDA β Port C bit 4 / SPI data in / I2C data |
| Pin 13 | RC5/SDO β Port C bit 5 / SPI data out |
| Pin 14 | RC6/TX/CK β Port C bit 6 / USART TX / USART clock |
| Pin 15 | RC7/RX/DT β Port C bit 7 / USART RX / USART data |
| Pin 16 | RB0/INT β Port B bit 0 / external interrupt |
| Pin 17 | RB1 β Port B bit 1 |
| Pin 18 | RB2 β Port B bit 2 |
| Pin 19 | RB3 β Port B bit 3 |
| Pin 20 | RB4 β Port B bit 4 |
| Pin 21 | RB5 β Port B bit 5 |
| Pin 22 | RB6/PGC β Port B bit 6 / ICSP clock |
| Pin 23 | RB7/PGD β Port B bit 7 / ICSP data |
| Pin 24 | Vdd β Positive supply |
| Pin 25 | Vss β Ground reference |
| Pin 26 | RA0/AN0 β Port A bit 0 / ADC input 0 |
| Pin 27 | RA1/AN1 β Port A bit 1 / ADC input 1 |
| Pin 28 | MCLR/Vpp β Master clear reset (active low) / programming voltage |
Typical Applications
PIC16C62AT-20I/SS is suitable for 6 applications: Industrial Sensor Conditioning, Home Appliance Control, Automotive Body Electronics (Cabin), Instrumentation and Metering, Motor Control Subsystems, Embedded Control and I/O Expansion.
Industrial Sensor Conditioning
The PIC16C62AT-20I/SS fits industrial sensor conditioning boards where a deterministic 8-bit core plus on-chip ADC and USART simplify 4-20 mA or RS-485 sensor front-ends. Its 5-channel 8-bit ADC samples thermocouple, RTD-bridge, or pressure-sensor signals without an external analogue front end, and the integrated USART talks to a host PLC or industrial gateway. Operating from 2.5 V to 6.0 V and -40C to +85C, the part is tolerant of factory-supply noise and wide temperature swings; 128 bytes RAM accommodates small linearisation tables and a moving-average filter. Use the watchdog timer and brown-out reset blocks to recover from EMI-induced hangs on long sensor cables.
Recommended
Home Appliance Control
In small home appliances such as microwave ovens, washing-machine sub-modules, induction cookers, and air-conditioner remotes, the PIC16C62AT-20I/SS drives relays, triacs, LEDs, and keypads while running simple state machines in OTP memory. Its 22 I/O pins cover multi-digit seven-segment displays and a keypad matrix without external logic; the 16-bit CCP timer generates PWM for fan-speed or triac phase-angle control. The industrial temperature range and wide 2.5-6.0 V supply accommodate rectified mains-derived rails, while the 20 MHz instruction rate delivers 5 MIPS for de-bounce and timing logic.
Recommended
Automotive Body Electronics (Cabin)
For non-safety cabin modules such as interior lighting controllers, seat-position memories, mirror adjusters, and HVAC flaps, the PIC16C62AT-20I/SS operates across the automotive 12 V regulated rail via a 5 V LDO and provides the USART link to a body-control network. The 5-channel ADC reads multi-position switch inputs and potentiometers for trim and mirror position, while the SSP block drives SPI-controlled LED drivers. Designers pair it with the PIC16C62AT-20E/SS extended-temperature grade for higher-thermal zones; for AEC-Q100 qualified builds migrate to the automotive-qualified PIC16F family.
Recommended
Instrumentation and Metering
Digital panel meters, hand-held multimeters, and process-control indicators use the PIC16C62AT-20I/SS to drive LCD segments or LED displays, sample a 4-20 mA or 0-10 V transducer signal, and run a calibration menu on a few buttons. The on-chip ADC handles the transducer with software linearisation, while the SSP block connects to an external EEPROM for calibration constants. The PIC16C62A's low power-down current and SLEEP mode extend battery life in portable instruments, and the SSOP-28 footprint keeps the BOM small inside compact housings.
Recommended
Motor Control Subsystems
Small DC, brushless, or stepper motor controllers for pumps, fans, and small appliances leverage the PIC16C62AT-20I/SS's 16-bit CCP/PWM block to generate a precision PWM drive, while the 8-bit timers time the commutation events for sensored BLDC operation. The USART enables a service-port or wired remote control link for diagnostics or speed-set commands. With 5 MIPS at 20 MHz, the part implements PI loops, soft-start ramps, and stall-detection firmware in firmware, all within 3.5 KB of OTP. Industrial-grade temperature handling supports enclosed motor housings.
Recommended
Embedded Control and I/O Expansion
Designers use the PIC16C62AT-20I/SS as a low-cost I/O expander and supervisory co-processor alongside a more powerful host processor or SoC, offloading keypad scanning, LED driving, watchdog supervision, and discrete GPIO expansion over I2C or SPI. The on-board USART/SSP block makes a clean protocol bridge to the host, and 22 I/O lines add meaningful peripheral count without consuming host pins. With its industrial temperature grade and proven PIC16C reliability, the part serves as a robust housekeeping MCU in POS terminals, vending machines, and industrial HMIs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62AT-20I/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62A-20I/SS | PIC16C62B-20I/SS | PIC16C622A-20I/SS | PIC16F628A-I/SS | PIC16F88-I/SS |
|---|---|---|---|---|---|---|
| Package | SSOP-28 (5.30mm) | SSOP-28 (5.30mm) - same | SSOP-28 (5.30mm) - same | SSOP-28 (5.30mm) - same | SSOP-28 (5.30mm) - same | SSOP-28 (5.30mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB Flash | 4 KB Flash |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 224 bytes | 368 bytes |
| EEPROM | Not present | Not present | Not present | Not present | 128 bytes | 256 bytes |
| ADC | 5-ch x 8-bit | 5-ch x 8-bit | 5-ch x 8-bit | 5-ch x 8-bit | None (comparators only) | 7-ch x 10-bit |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| RoHS / Lead-Free | Non-RoHS (legacy Pb) | Non-RoHS (legacy Pb) | Non-RoHS (legacy Pb) | Non-RoHS (legacy Pb) | RoHS compliant (Pb-free) | RoHS compliant (Pb-free) |
| Reprogrammable | No (OTP) | No (OTP) | No (OTP) | No (OTP) | Yes (Flash, 100k cycles) | Yes (Flash, 100k cycles) |
Key Differentiators
- Industrial temperature grade (-40C to +85C) as standard (vs PIC16C62AT-20I/SO)
- On-chip ADC and USART integrate analog and comms (vs PIC16F628A-I/SS)
- Wider supply voltage range than flash successors (vs PIC16F628A-I/SS)
Design Notes
PIC16C62AT-20I/SS draws roughly 2 mA at 5 V / 20 MHz with all peripherals enabled and falls to under 1 uA in SLEEP mode. Decouple Vdd with a 100 nF ceramic placed within 5 mm of the Vdd/Vss pins and bulk the rail with at least 10 uF; add an RC low-pass on Vpp/MCLR (typical 10 kohm + 100 nF) to ensure a clean power-on-reset. For battery-backed designs, the brown-out reset block should be enabled with a BOR voltage below the minimum Vdd of 2.5 V to avoid spurious resets during sleep.
Place the decoupling capacitor as close as possible to pins 24 (Vdd) and 25 (Vss), and route the MCLR/Vpp pin through a 10 kohm pull-up to Vdd with a 100 nF to ground for the ICSP programming interface. The OSC1/OSC2 traces should be short and guarded by a ground ring; for crystal operation select a fundamental-mode XTAL with 15-33 pF load capacitors matched to the crystal ESR. Avoid routing the analog inputs RA0-RA5 near the OSC2 trace to minimise ADC clock-coupling noise; if used, shield the analog tracks with a ground pour.
Estimated: writing the OTP program memory of the PIC16C62AT-20I/SS consumes approximately 30 seconds per device at production programming time, and OTP cannot be erased - so always burn a 'final' golden build after validation. Ensure configuration bits (fuses) are explicitly set rather than left at default, especially the watchdog enable (default off), BOR voltage, and oscillator mode. Reserve RB6/RB7 for ICSP - if the application drives them as outputs, disable the LVP bit and use HVP, otherwise the part will enter programming mode unexpectedly at power-up.
Compliance Information
PIC16C family OTP parts are generally non-RoHS (legacy Pb terminal finish) and not AEC-Q100 qualified; Microchip flags the family as last-time-buy for many SKUs. Industrial temperature grade is supported (-40C to +85C) but automotive-grade temperature and EMI qualification require migration to the PIC16F flash family.
