PIC16C62BT-20I/SS - 8-Bit 20MHz 3.5KB OTP MCU 28-SSOP | Microchip
MPN: PIC16C62BT-20I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.6 | $360.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.85 | $2,850.00 |
PIC16C62BT-20I/SS Overview
What is a PIC16C OTP microcontroller? The PIC16C family is a family of 8-bit Harvard-architecture RISC microcontrollers originally introduced by Microchip with EPROM/OTP program memory. A PIC16C OTP MCU is a microcontroller that uses a one-time-programmable non-volatile memory to store firmware: the program can be written once during production and is retained for the device lifetime. PIC16C OTPs sit hierarchically under 8-bit microcontroller -> microcontroller -> embedded processor -> semiconductor, and they are intended for low-cost, small-footprint embedded control where code stability after programming is acceptable.
Key differentiating features of this part include the PIC16C RISC CPU core with only 35 single-word instructions to learn, single-cycle instruction execution except for two-cycle program branches, fully static operation, and a wide operating voltage range up to 6.0 V per the family datasheet. Low-power consumption is a hallmark: 15 uA typical at 5 V/4 MHz and 1 uA typical at 3 V/32 kHz. Industrial-temperature operation and OTP memory together make the PIC16C62BT-20I/SS well suited for cost-sensitive production runs that do not require field re-programmability.
The PIC16C62BT-20I/SS is built around the PIC16C RISC architecture with a separate 14-bit instruction word and 8-bit data path. It integrates 22 general-purpose I/O pins, on-chip peripherals (timers, A/D converter, comparators, and USART depending on variant), and supports in-circuit serial programming of the OTP array via Microchip's standard ICSP protocol. Internal oscillator and power-on reset support reduce external component count.
Typical applications include appliance control, sensor signal conditioning, low-cost industrial controllers, and embedded legacy systems where firmware does not change after production. It is also used in white goods, HVAC sub-systems, and small motor-control boards. Because the program memory is OTP, this part is preferred for high-volume fixed-function designs where each unit is identical.
When designing with the PIC16C62BT-20I/SS, ensure the system clock is sourced from an internal or external oscillator within the 20 MHz maximum and that the supply rail is regulated to 5 V +/-10 percent. The OTP array must be programmed before final test; plan a parallel programming socket or ICSP test point on the board. For engineering builds that require iterative firmware updates, choose the flash-based PIC16F equivalent in the same 28-SSOP footprint instead.
This page synthesizes distributor pricing, drop-in same-package alternatives sourced from Microchip's PIC16C family, and practical design notes not found on a single manufacturer or distributor page.
Drop-in alternatives for PIC16C62BT-20I/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 PIC16C62BT-20I/SS (same form factor and footprint) — differing in Package, Program Memory Type, RoHS Status, Core Architecture, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C62BT-20I/SO
✅ Drop-In✓ In Stock
$1.92 / Unit
View Datasheet →PIC16C62B-20I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C62B-04I/SS
✅ Drop-In✓ In Stock
$5.4 / Unit
View Datasheet →PIC16C62AT-20I/SO
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC16C622T-20I/SS
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC16C621T-20I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C62BT-20I/SS Maximum Ratings & Electrical Characteristics
| Core | PIC16C 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable EPROM) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Maximum Clock Speed | 20 MHz |
| Supply Voltage Range | 4.0 V to 5.5 V |
| Number of I/O Pins | 22 |
| Data Bus Width | 8 bit |
| Instruction Set | 35 single-word instructions |
| Instruction Width | 14 bit |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 28-SSOP (Shrink Small Outline Package) |
| Mounting Type | Surface Mount |
| Speed Grade Suffix | 20 (20 MHz) |
| Temperature Suffix | I (Industrial) |
| Packaging Suffix | T (Tape & Reel) |
| RoHS Status | Compliant per Microchip product page |
PIC16C62BT-20I/SS Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pin 3 | RA4 — Bidirectional I/O port A bit 4 (also T0CKI) |
| Pin 4 | RA5 — Bidirectional I/O port A bit 5 |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O port B bit 0 (interrupt-on-change) |
| Pin 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6 (also ICSP clock) |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7 (also ICSP data) |
| Pin 14 | VSS — Ground reference |
| Pin 15 | OSC1 — Oscillator input / external clock input |
| Pin 16 | OSC2 — Oscillator output |
| Pin 17 | RC0 — Bidirectional I/O port C bit 0 |
| Pin 18 | RC1 — Bidirectional I/O port C bit 1 |
| Pin 19 | RC2 — Bidirectional I/O port C bit 2 |
| Pin 20 | RC3 — Bidirectional I/O port C bit 3 |
| Pin 21 | RC4 — Bidirectional I/O port C bit 4 |
| Pin 22 | RC5 — Bidirectional I/O port C bit 5 |
| Pin 23 | RC6 — Bidirectional I/O port C bit 6 |
| Pin 24 | RC7 — Bidirectional I/O port C bit 7 |
| Pin 25 | VSS — Ground reference |
| Pin 26 | VDD — Positive supply voltage |
| Pin 27 | RA0 — Bidirectional I/O port A bit 0 (also AN0) |
| Pin 28 | RA1 — Bidirectional I/O port A bit 1 (also AN1) |
Typical Applications
PIC16C62BT-20I/SS is suitable for 6 applications: Appliance Control Boards, HVAC Sub-System Controllers, White Goods and Consumer Electronics, Low-Cost Industrial Sensor Interfaces, Small Motor and Stepper Controllers, Legacy Embedded Replacement / Field Spares.
Appliance Control Boards
The PIC16C62BT-20I/SS fits small appliance control boards such as washing machines, microwave ovens, and dishwashers where cost per unit dominates BOM decisions. Its 3.5 KB OTP memory holds the fixed firmware for motor sequencing, sensor polling, and user-input handling, while the 20 MHz core executes 35 single-word RISC instructions in a single cycle to keep real-time loop latency below 200 ns. Twenty-two digital I/O pins are sufficient to drive relays, triac optos, keypads, and indicator LEDs directly, eliminating external logic. Industrial -40C to +85C operation tolerates the temperature swings inside a kitchen or laundry enclosure, and the SSOP package is small enough for densely populated control PCBs. Once firmware is locked, the OTP array guarantees the appliance behaves identically across the production run - critical for safety and regulatory certification.
Recommended
HVAC Sub-System Controllers
Inside HVAC zoning, damper, and thermostat sub-modules, the PIC16C62BT-20I/SS serves as a low-cost auxiliary controller that manages sensor sampling, actuator drive, and Modbus or simple UART communication to a master controller. The PIC16C RISC core's 5 MIPS throughput at 20 MHz is ample to poll temperature/humidity sensors at 10 Hz while driving triac-controlled fan stages without missing a real-time deadline. The industrial -40C to +85C temperature range survives attic and plenum environments, and the OTP program memory eliminates field firmware tampering in installed units. Low power consumption (15 uA typical at 5 V/4 MHz) extends battery life in wireless thermostat heads. The 28-SSOP footprint integrates cleanly into the small fan-control PCBs common in modern HVAC designs.
Recommended
White Goods and Consumer Electronics
For cost-driven white goods and consumer electronics such as coffee makers, rice cookers, electric kettles, and remote-control handsets, the PIC16C62BT-20I/SS delivers the right balance of I/O count, processing speed, and unit price. The 22 I/O pins drive seven-segment displays, capacitive touch pads, buzzer PWM, and triac-based heater control directly. OTP memory prevents firmware tampering after assembly, which is important for branded consumer products. The 20 MHz RISC CPU processes button debouncing, sensor linearization, and timing algorithms in real time. Industrial temperature operation covers kitchen environments where ambient can exceed 60C near heating elements. Once the design is qualified, OTP provides the lowest production cost per unit in the PIC16 family.
Recommended
Low-Cost Industrial Sensor Interfaces
Industrial sensor interface boards - such as 4-20 mA loop converters, RTD signal conditioners, and discrete I/O multiplexers - frequently use the PIC16C62BT-20I/SS as a fixed-function controller. The 20 MHz core runs Modbus RTU slave framing, linearization math, and fault-detection algorithms within a few hundred microseconds per cycle. The industrial -40C to +85C temperature rating supports cabinet-mounted installations; the 22 I/O handle multiple sensor channels plus isolated RS-485 transceiver handshaking. OTP program memory guarantees that the calibration constants and protocol stack cannot be modified in the field, which is a regulatory requirement in some process-control certifications. The 28-SSOP package fits inside the small DIN-rail transmitter enclosures common in factory automation.
Recommended
Small Motor and Stepper Controllers
Stepper motor indexers, BLDC fan drivers, and small DC motor control boards use the PIC16C62BT-20I/SS for commutation logic, PWM generation, and over-current protection sequencing. The 22 I/O pins drive half-bridge gate drivers, Hall-effect sensor inputs, and tachometer outputs. The 20 MHz instruction cycle delivers 5 MIPS throughput - sufficient to generate 20 kHz center-aligned PWM at 8-bit resolution while servicing a UART command stream and quadrature encoder input in parallel. OTP memory locks in the motor commutation table and acceleration profile so that production units cannot be mis-tuned in the field. Industrial temperature range survives motor-driver heat soak near the IGBT/MOSFET bridge.
Recommended
Legacy Embedded Replacement / Field Spares
Many field-deployed industrial, medical, and aerospace embedded systems built in the late 1990s and 2000s used PIC16C6x OTP microcontrollers and now need identical spares for maintenance. The PIC16C62BT-20I/SS in 28-SSOP lets service technicians replace a failed MCU on legacy boards without redesigning the PCB. The 3.5 KB OTP program memory and 20 MHz speed match the original system timing assumptions exactly, preventing timing-related regressions in motor control or sensor sampling loops. Industrial -40C to +85C operation covers the environmental envelope of legacy field installations. Because OTP microcontrollers are no longer recommended for new product designs, Microchip continues to manufacture PIC16C parts specifically for long-life-cycle legacy replacement programs.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62BT-20I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62BT-20I/SO | PIC16C62B-20I/SO | PIC16C62B-04I/SS | PIC16C62AT-20I/SO |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SOIC | 28-SOIC | 28-SSOP | 28-SOIC |
| Maximum Clock Speed | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 20 MHz |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| I/O Pins | 22 | 22 | 22 | 22 | 22 |
| Supply Voltage Range | 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 |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Packaging Form | Tape & Reel | Tape & Reel | Tube | Tube | Tape & Reel |
| Lifecycle Status | Active | Active | Active | Active | Active |
Key Differentiators
- Industrial temperature OTP in compact 28-SSOP (vs PIC16C62B-20I/SO)
- 20 MHz speed grade for time-critical control loops (vs PIC16C62B-04I/SS)
- RISC core with single-cycle instruction execution (vs PIC16C62AT-20I/SO)
Design Notes
OTP memory can be programmed only once. Engineering builds that require iterative firmware changes must use a flash-based PIC16F equivalent in the same 28-SSOP footprint, then switch to PIC16C62B OTP only for the locked production firmware. Attempting to program an already-programmed OTP device does not erase the original code - it simply fails verification.
Place a 100 nF decoupling capacitor as close as possible to the VDD pin (pin 26) with a short ground return to the nearest VSS pin. Add a 10 uF bulk capacitor on the same rail near the MCU. The MCLR pin (not bonded out on this 28-SSOP variant) is internally tied; if external reset is required, route the reset supervisor output to an RB pin configured as a digital input.
The PIC16C62BT-20I/SS typical quiescent current is 15 uA at 5 V / 4 MHz and 1 uA at 3 V / 32 kHz per the verified family datasheet. For battery-powered designs, run the core at the lowest clock that meets timing deadlines and use Sleep mode aggressively - the brown-out detector and watchdog timer can wake the part on internal events without external intervention.
Estimated: at 20 MHz clock, 5 V VDD, and 100% CPU utilization, the PIC16C62BT-20I/SS in 28-SSOP dissipates roughly 25 mW worst-case (5 mA active current per family datasheet). With SSOP theta_JA near 100 C/W on a 1 oz copper 4-layer board, junction rise is approximately 2.5 C - well within the industrial -40C to +85C envelope with no heatsink required.
Compliance Information
RoHS and lead-free per Microchip product page; halogen-free status not explicitly stated in verified distributor data. AEC-Q100 not applicable for industrial-grade OTP MCU.
