PIC16C62B-20/SS - 8-bit OTP MCU, 20MHz, 3.5KB, 28-SSOP | Microchip
MPN: PIC16C62B-20/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.2 | $7.20 |
| 10 | $6.45 | $64.50 |
| 100 | $5.7 | $570.00 |
| 500 | $5.1 | $2,550.00 |
| 1,000 | $4.55 | $4,550.00 |
PIC16C62B-20/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, non-volatile program memory, working RAM, and peripheral interfaces. The PIC16C6x family sits within Microchip's mid-range 8-bit PIC architecture hierarchy: PIC10/12/14/16/18 microcontrollers -> 8-bit RISC MCUs -> embedded controllers. The OTP memory is programmed once at production time, making PIC16C62B ideal for high-volume, cost-sensitive, fully validated designs where field firmware updates are not required.
Key features include 35 single-word instructions, an operating voltage range of 2.5 V to 6.0 V (with 4 V to 5.5 V recommended for 20 MHz operation), a 10-bit ADC on selected variants, two 8-bit timers plus one 16-bit timer, a watchdog timer with on-chip RC oscillator, in-circuit serial programming via two pins, and a programmable code protection mechanism. The 28-SSOP package supports industrial temperature operation from -40 °C to +85 °C.
Architecturally, PIC16C62B uses a Harvard-style separate program and data bus, which lets an instruction fetch and a data access occur in the same cycle. The result is deterministic timing with zero pipeline stalls for sequential instructions - critical for interrupt-driven control loops and real-time motor or sensor sampling.
Typical applications include appliance control panels, HVAC damper actuators, simple sensor hubs, security PIR keypads, consumer remote controls, and automotive body modules. Designers value the part for its wide tool ecosystem (MPLAB IDE, MPASM, MPLAB PM3 programmer) and pin-compatibility with the flash-based PIC16F62x family, which lets early prototypes use re-programmable silicon before locking the BOM to OTP.
When designing with PIC16C62B-20/SS, use an external 20 MHz crystal or resonator with the recommended 22 pF load capacitors, and respect the maximum I/O sink/source of 25 mA per pin (200 mA total) to avoid latch-up. For new designs requiring flash reprogramming, evaluate PIC16F628 or PIC16F88 first and treat PIC16C62B as a cost-down BOM for already-frozen firmware.
Drop-in alternatives for PIC16C62B-20/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 PIC16C62B-20/SS (same form factor and footprint) — differing in Operating Temperature, Program Memory Size, Program Memory Type, Timers, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C62B-20I/SS
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16C62B-04I/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.4 / Unit
View Datasheet →PIC16C622-20/SS
✅ Drop-In✓ In Stock
$1.38 / Unit
View Datasheet →PIC16C621-20/SS
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16F628-20I/SS
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16C620-20/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$2.41 / Unit
View Datasheet →PIC16C62B-20/SS Maximum Ratings & Electrical Characteristics
| Core | 8-bit PIC RISC |
| Program Memory | 3.5 KB (2K x 14) OTP |
| RAM | 128 bytes |
| EEPROM | 128 bytes |
| Maximum CPU Speed | 20 MHz |
| Instruction Throughput | 5 MIPS (200 ns per instruction) |
| I/O Pins | 22 |
| Supply Voltage (VDD) | 2.5 V to 6.0 V (4 V to 5.5 V at 20 MHz) |
| Timers | 2 x 8-bit, 1 x 16-bit |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| ADC | None on PIC16C62B (see PIC16C63/64/65) |
| Oscillator Modes | XT, HS, LP, RC |
| Program Memory Type | One-Time-Programmable (OTP) EPROM |
| Package | 28-pin SSOP (5.30 mm / 0.209 in body width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 °C to +85 °C (industrial) |
| I/O Sink/Source | 25 mA per pin (200 mA total) |
| ICSP | In-Circuit Serial Programming via RB6/RB7 |
| RoHS Status | Compliant |
PIC16C62B-20/SS Pin Configuration
| Pin 1 | RA2/AN2 — Port A bit 2 / analog input (note: PIC16C62B without ADC; AN function N/A) |
| Pin 2 | RA3/AN3 — Port A bit 3 / analog input (N/A on PIC16C62B) |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 4 | RA5/SS — Port A bit 5 / SPI slave select |
| Pin 5 | RE0/RD — Port E bit 0 / parallel slave read (PIC16C62B limited) |
| Pin 6 | RE1/WR — Port E bit 1 / parallel slave write |
| Pin 7 | RE2/CS — Port E bit 2 / parallel slave chip select |
| Pin 8 | VDD — Positive supply voltage |
| Pin 9 | OSC2/CLKOUT — Crystal output / clock out |
| Pin 10 | OSC1/CLKIN — Crystal input / external clock |
| Pin 11 | RA6 — Port A bit 6 |
| Pin 12 | RA7 — Port A bit 7 |
| Pin 13 | RB0/INT — Port B bit 0 / external interrupt |
| Pin 14 | RB1 — Port B bit 1 |
| Pin 15 | RB2 — Port B bit 2 |
| Pin 16 | RB3 — Port B bit 3 |
| Pin 17 | RB4 — Port B bit 4 |
| Pin 18 | RB5 — Port B bit 5 |
| Pin 19 | RB6/PGC — Port B bit 6 / ICSP clock |
| Pin 20 | RB7/PGD — Port B bit 7 / ICSP data |
| Pin 21 | RC0 — Port C bit 0 |
| Pin 22 | RC1 — Port C bit 1 |
| Pin 23 | RC2 — Port C bit 2 |
| Pin 24 | RC3 — Port C bit 3 |
| Pin 25 | RC4 — Port C bit 4 |
| Pin 26 | RC5 — Port C bit 5 |
| Pin 27 | RC6 — Port C bit 6 |
| Pin 28 | RC7 — Port C bit 7 |
Typical Applications
PIC16C62B-20/SS is suitable for 6 applications: Home Appliance Control Board, HVAC Damper and Fan Controller, Security Keypad and PIR Sensor Hub, Consumer Remote Control Unit, Automotive Interior Body Module, Industrial Sensor Signal Conditioner.
Home Appliance Control Board
The PIC16C62B-20/SS is well matched to appliance control boards such as microwave ovens, washing machine user interfaces, dishwasher timers, and refrigerator temperature displays. Its 20 MHz core processes keyboard scans, seven-segment multiplex, and triac/relay firing within tight cycle budgets, while 22 I/O pins drive LED or LCD panels and read multiple sensor inputs. With 3.5 KB OTP memory the firmware is locked at production, eliminating field reprogramming risks in consumer environments. Typical supply current of 2-10 mA from a 5 V rail keeps power dissipation low even in always-on appliances.
Recommended
HVAC Damper and Fan Controller
Building HVAC actuators controlling dampers, fan speeds, and thermostatic valves can use PIC16C62B-20/SS as the central controller. The 8-bit RISC core executes PID loops fast enough to drive brushless DC motors with PWM, while the 16-bit timer captures tachometer feedback from Hall sensors. Industrial -40 C to +85 C operation tolerates plenum and rooftop enclosures. The 28-SSOP footprint fits compact actuator PCBs alongside bridge drivers and AC line-side isolation.
Recommended
Security Keypad and PIR Sensor Hub
Wired security keypads, PIR motion hubs, and door/window sensor concentrators use PIC16C62B-20/SS to read keypad matrices, interface with PIR analog front ends, and transmit alarm events over simple serial links. The OTP memory prevents firmware tampering, a key requirement for UL-listed security panels. With 22 I/O pins the MCU handles a 4x4 keypad, multiple zone inputs, status LEDs, and a piezo buzzer driver without external I/O expansion.
Recommended
Consumer Remote Control Unit
Universal remote controls, garage-door openers, and ceiling-fan remotes benefit from PIC16C62B-20/SS low power draw and small SSOP package. The 20 MHz core easily handles RC5/RC6 or proprietary IR protocols, while the two 8-bit timers drive PWM outputs for backlight dimming and buzzer feedback. OTP memory locks each SKU to a fixed device code list, preventing field reconfiguration. Battery life is extended by the watchdog-driven sleep mode, drawing under 1 uA between button presses.
Recommended
Automotive Interior Body Module
Body controllers for window regulators, mirror adjustments, seat-position memory, and interior lighting use PIC16C62B-20/SS in non-safety-critical functions. The 28-SSOP withstands automotive underhood temperature swings when paired with conformal coating, and the 22 I/O pins comfortably manage multiple motor bridges and switch inputs. The OTP variant is preferred over flash to reduce field-reprogramming liability in the OEM warranty period.
Recommended
Industrial Sensor Signal Conditioner
Process-control signal conditioners and transducer digitizers use PIC16C62B-20/SS to apply linearization, scaling, and digital filtering on analog sensor signals before passing them to fieldbus transmitters. The deterministic instruction timing eliminates jitter in synchronous-sampling pipelines, while the watchdog and brown-out reset features ensure recovery from noisy industrial supply rails. The 28-SSOP package fits DIN-rail transmitter enclosures alongside 4-20 mA loop drivers.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62B-20/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62B-20I/SS | PIC16C62B-04I/SS | PIC16C622-20/SS | PIC16F628-20I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SSOP | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same | 28-SSOP - same |
| Maximum Clock Speed | 20 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB Flash |
| Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (reprogrammable) |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 224 bytes |
| I/O Pins | 22 | 22 | 22 | 22 | 16 |
| ADC | None | None | None | None | None (but has comparators) |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
Key Differentiators
- Lower-RAM cost-down alternative in same footprint (vs PIC16C621-20/SS)
- Modern flash-based drop-in replacement (vs PIC16F628-20I/SS)
- Sibling speed-grade option for low-power designs (vs PIC16C62B-04I/SS)
Design Notes
Estimated: at VDD = 5 V and 20 MHz, PIC16C62B-20/SS draws approximately 10 mA active and less than 1 uA in sleep. For battery designs budget a 3.3 V LDO with at least 50 mA headroom to accommodate peripheral transients. Add a 100 nF decoupling cap within 5 mm of VDD (pin 8) and a 10 uF bulk cap at the regulator output; the wide 2.5 V to 6.0 V supply tolerance lets you reuse the same BOM for both 3.3 V and 5 V designs by swapping only the LDO.
PIC16C62B-20/SS uses One-Time-Programmable EPROM - once programmed it cannot be reprogrammed in the SSOP package (no erasure window). Verify firmware thoroughly on a flash equivalent (PIC16F628-20I/SS, same pinout) before committing to OTP. Watch the CONFIG word for the oscillator mode and watchdog setting; an incorrect CONFIG word locks the device. Confirm MCLR/VPP pin has the proper 10 kohm pull-up to avoid spurious resets during ICSP.
For 28-SSOP with 0.65 mm pitch, route the ICSP pair (RB6/PGD, RB7/PGC) with 0.2 mm clearance to other signals and provide a 6-pin ICSP header footprint on production boards for in-circuit programming and debug. Keep the 20 MHz crystal traces short (under 5 mm) and surround with a ground guard ring. Add a 1 kohm series resistor on MCLR if the board is exposed to ESD-prone I/O connectors; this limits surge current into the internal clamp diodes.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified; PIC16C62B is intended for industrial/consumer applications. Halogen-free status not explicitly stated in the verified data.
