PIC16C62B-04/SO - 4MHz 8-Bit OTP MCU 3.5KB | Microchip
MPN: PIC16C62B-04/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.46 | $4.46 |
| 10 | $4.1 | $41.00 |
| 100 | $3.85 | $385.00 |
| 500 | $3.71 | $1,855.00 |
| 1,000 | $3.62 | $3,620.00 |
PIC16C62B-04/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer based on an 8-bit data path; it belongs to the broader hierarchy of embedded microcontrollers -> microcontrollers -> microprocessors -> semiconductor ICs. Microchip's PIC10/12/16 family in particular targets low-cost, deterministic control of simple to moderately complex embedded tasks where small code size, low power, and ease of development with MPLAB tools matter more than raw compute throughput. The PIC16C62B sits in the mid-range PIC16 OTP lineup that helped establish the PIC architecture in commercial and industrial control.
Key features include 4 MHz maximum clock (200 ns instruction cycle), 14-bit wide instructions, 8-level deep hardware stack, 4 oscillator options (RC, LP, XT, HS), programmable code protection, in-circuit serial programming (ICSP) capability, and an operating voltage range of 4.0 V to 5.5 V. The device supports both commercial (0C to +70C) and industrial temperature grades within the family, with brown-out detection and Power-on Reset supporting reliable operation in noisy electrical environments.
The PIC16C62B uses Microchip's classic Harvard architecture, separating program and data buses so that an instruction fetch and a data read can occur in the same cycle, which is one reason PIC cores deliver deterministic interrupt latency and high code density. The integrated ADC uses successive-approximation conversion with 8-bit resolution, suitable for monitoring slow-changing analog signals such as battery voltage, sensor outputs, or potentiometer positions rather than high-bandwidth signals.
Typical applications include appliance controls, HVAC fan and damper control, small consumer electronics, automotive body modules, remote sensors, simple motor control loops, and battery-powered instrumentation where the OTP program memory and small footprint are acceptable. Designers choose the PIC16C62B-04/SO over flash-based PICs when the firmware is finalized and unit cost is paramount, and over larger PICs when only a handful of I/O and a small program are required.
When designing with this part, remember that OTP memory cannot be re-programmed in the field; the ICSP programming interface and a UV-erasable windowed variant (JW package) are typically used for prototype development. The 4 MHz speed grade is suitable for low-bandwidth control tasks; for timing-sensitive serial communication or PWM, consider the 20 MHz speed grade. A decoupling capacitor of 0.1 uF placed within 5 mm of VDD is strongly recommended to suppress switching noise from the internal oscillator and I/O transients.
This page synthesizes distributor pricing, drop-in alternatives from Microchip's broader PIC16 mid-range family, and practical design notes not consolidated on a single manufacturer page.
Drop-in alternatives for PIC16C62B-04/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 PIC16C62B-04/SO (same form factor and footprint) — differing in Package, Timers, Program Memory Size, RAM Size, ADC.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C62B-04I/SO
✅ Drop-In✓ In Stock
$5.02 / Unit
View Datasheet →PIC16C62B-20/SO
✅ Drop-In✓ In Stock
$4.65 / Unit
View Datasheet →PIC16C62B-20I/SO
✅ Drop-In ⚠️ 参数待验证📋 Reference alternative (not in catalog)
PIC16C62A-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C62A-04E/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$4.75 / Unit
View Datasheet →PIC16C63-04/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$5.57 / Unit
View Datasheet →PIC16C62B-04/SO Maximum Ratings & Electrical Characteristics
| Core | PIC 8-bit RISC |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM | 128 bytes |
| Maximum CPU Frequency | 4 MHz |
| Instruction Cycle | 200 ns |
| Operating Voltage | 4.0 V to 5.5 V |
| Number of I/O Pins | 22 |
| ADC | 8-bit, 13 channels |
| Timers | 2 x 8-bit Timer/Counter |
| Watchdog Timer | Yes (with dedicated RC oscillator) |
| Analog Comparator | Yes (1 internal) |
| Oscillator Modes | RC, LP, XT, HS |
| Brown-out Reset / POR | Yes |
| In-Circuit Serial Programming | Yes (ICSP) |
| Operating Temperature | 0C to +70C (commercial) |
| Package | 28-pin SOIC (SO), wide-body 7.5 mm |
| Mounting Type | Surface Mount |
PIC16C62B-04/SO Pin Configuration
| Pin 1 | MCLR/VPP — Master clear (reset) input / programming voltage |
| Pin 2 | RA0/AN0 — PORTA bit 0 / ADC channel 0 |
| Pin 3 | RA1/AN1 — PORTA bit 1 / ADC channel 1 |
| Pin 4 | RA2/AN2 — PORTA bit 2 / ADC channel 2 |
| Pin 5 | RA3/AN3/VREF — PORTA bit 3 / ADC channel 3 / ADC reference |
| Pin 6 | RA4/T0CKI — PORTA bit 4 (open-drain) / Timer0 clock input |
| Pin 7 | RA5/AN4 — PORTA bit 5 / ADC channel 4 |
| Pin 8 | VSS — Ground |
| Pin 9 | OSC1/CLKIN — Oscillator input / external clock |
| Pin 10 | OSC2/CLKOUT — Oscillator output / clock out |
| Pin 11 | RC0/T1OSO/T1CKI — PORTC bit 0 / Timer1 oscillator output / Timer1 clock |
| Pin 12 | RC1/T1OSI — PORTC bit 1 / Timer1 oscillator input |
| Pin 13 | RC2/CCP1 — PORTC bit 2 / Capture/Compare/PWM 1 |
| Pin 14 | RC3 — PORTC bit 3 |
| Pin 15 | RC4 — PORTC bit 4 |
| Pin 16 | RC5 — PORTC bit 5 |
| Pin 17 | RC6 — PORTC bit 6 |
| Pin 18 | RC7 — PORTC bit 7 |
| Pin 19 | VSS — Ground |
| Pin 20 | VDD — Positive supply (4.0 V to 5.5 V) |
| Pin 21 | RB0/INT — PORTB bit 0 / external interrupt |
| Pin 22 | RB1 — PORTB bit 1 |
| Pin 23 | RB2 — PORTB bit 2 |
| Pin 24 | RB3 — PORTB bit 3 |
| Pin 25 | RB4 — PORTB bit 4 |
| Pin 26 | RB5 — PORTB bit 5 |
| Pin 27 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 28 | RB7/PGD — PORTB bit 7 / ICSP data |
Typical Applications
PIC16C62B-04/SO is suitable for 6 applications: Appliance Control Boards, HVAC Fan and Damper Control, Simple Consumer Electronics, Industrial Sensor Interfaces, Automotive Body Modules (Legacy), Battery-Powered Instrumentation.
Appliance Control Boards
The PIC16C62B-04/SO suits appliance control boards where the firmware is finalized and unit cost is paramount. Its 3.5 KB OTP memory comfortably holds state-machine logic for washing machine cycles, microwave oven user interfaces, and dishwasher pumps; the 22 I/O lines drive relays, keypads, seven-segment displays, and indicator LEDs without external mux logic. The 4 MHz speed grade is sufficient because typical loop times of 1-10 ms match the human-scale control response. The 28-SOIC footprint is friendly to single-sided wave-solderable boards common in white goods. Brown-out reset and watchdog timer protect against supply brownouts and software lockups in long-lived appliances. The -04/SO's commercial temperature grade (0C to +70C) covers indoor kitchen and laundry environments.
Recommended
HVAC Fan and Damper Control
The PIC16C62B-04/SO is well-matched to HVAC damper and fan controllers that read a few thermistors, drive triacs, and accept user inputs from a wall thermostat. The 13-channel 8-bit ADC is enough to scan multiple temperature sensors and potentiometer setpoints at low sample rates; the analog comparator can detect AC zero-crossing for triac phase-angle control. The 4 MHz core is more than sufficient for slow PID loops with 100 ms update periods. Two 8-bit timers can drive PWM outputs to vary fan speed and modulate damper actuators. Brown-out reset and the watchdog timer ensure the controller recovers from supply glitches on long motor leads. The OTP memory is appropriate for fixed HVAC firmware that never changes after production.
Recommended
Simple Consumer Electronics
The PIC16C62B-04/SO fits small consumer devices like remote controls, electronic toys, and simple kitchen timers where the BOM and per-unit cost dominate the design. 3.5 KB of OTP can hold menu logic, button-debounce state machines, and IR transmission sequences, while 128 bytes of RAM is enough for small lookup tables and user preferences. The 4 MHz speed handles low-rate IR protocols (38 kHz carrier, 1 kbps data) with timing done in software. Brown-out reset and Power-on Reset ensure the device boots cleanly after battery changes. The 28-SOIC package is hand-solderable for prototypes and matches the manufacturing volume of consumer goods.
Recommended
Industrial Sensor Interfaces
The PIC16C62B-04/SO works well in factory-floor sensor interface modules that convert analog process signals (4-20 mA, 0-10 V, thermocouple conditioned) into digital values for a PLC or display. The 13-channel 8-bit ADC can scan multiple sensor inputs at modest sample rates, and 22 digital I/O lines interface to relay outputs, status LEDs, and HMI connectors. The commercial temperature grade is acceptable for cabinet-mount modules, while the -I/SO variant supports harsher industrial environments. The 4 MHz CPU is sufficient to debounce inputs, drive character LCDs via software bit-banging, and execute linearization tables in real time.
Recommended
Automotive Body Modules (Legacy)
In legacy automotive body modules (interior lighting controllers, seat controllers, mirror switch logic) the PIC16C62B-04/SO is still found in service replacements. Although not AEC-Q100 qualified, the part has been widely used in older vehicle platforms where temperature and EMI conditions are managed at the system level. 22 I/O lines are enough for switch matrix scanning, LED driving, and LIN/analog interfaces. The 4 MHz CPU handles debounce and switch-state reporting at CAN-style update rates via external transceivers. For new automotive designs Microchip strongly recommends AEC-Q100-qualified PIC16F or dsPIC parts instead.
Recommended
Battery-Powered Instrumentation
The PIC16C62B-04/SO is a candidate for simple battery-powered instruments like handheld multimeters, basic data loggers, and low-duty-cycle remote sensors. The 4 MHz clock can be gated off most of the time, and the analog comparator plus 8-bit ADC can wake the part periodically to take a measurement before returning to sleep. Brown-out reset is essential for proper behavior on depleted batteries. 3.5 KB of OTP is enough for simple filtering, peak detection, and UART output of measurement results. The commercial temperature grade is acceptable for indoor handheld devices. The OTP memory prevents accidental field reprogramming that could brick an instrument.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62B-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62B-04I/SO | PIC16C62B-20/SO | PIC16C62B-20I/SO | PIC16C62A-04/SO | PIC16C62A-04E/SO | PIC16C63-04/SO |
|---|---|---|---|---|---|---|---|
| Package | 28-SOIC (wide-body) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC16 8-bit | PIC16 8-bit | PIC16 8-bit | PIC16 8-bit | PIC16 8-bit | PIC16 8-bit | PIC16 8-bit |
| Program Memory | 3.5 KB OTP (2K x 14) | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 7.2 KB OTP |
| Max CPU Frequency | 4 MHz | 4 MHz | 20 MHz | 20 MHz | 4 MHz | 4 MHz | 4 MHz |
| Temperature Grade | 0C to +70C (commercial) | -40C to +85C (industrial) | 0C to +70C | -40C to +85C | 0C to +70C | -40C to +125C (extended) | 0C to +70C |
| I/O Pins | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| ADC | 8-bit, 13 channels | 8-bit, 13 ch | 8-bit, 13 ch | 8-bit, 13 ch | 8-bit, 13 ch | 8-bit, 13 ch | 8-bit, 13 ch |
| USART | No | No | No | No | No | No | Yes |
| Operating 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 | 3.0 V to 6.0 V (PIC16C62A extends down to 3.0 V) | 3.0 V to 6.0 V | 3.0 V to 6.0 V |
Key Differentiators
- Commercial 0C to +70C operating temperature (vs PIC16C62B-04I/SO)
- Pin-to-pin 4 MHz speed grade (vs PIC16C62B-20/SO)
- Mid-size 3.5 KB OTP with full 13-channel ADC (vs PIC16C62A-04/SO)
Design Notes
Place a 0.1 uF decoupling capacitor within 5 mm of the VDD pin (pin 20) on the PIC16C62B-04/SO, and add a 10 uF bulk capacitor on the same supply rail. The PIC16C62B is rated for 4.0 V to 5.5 V; operating below 4.0 V can trigger brown-out reset. A bulk capacitor of 10-47 uF is recommended if the same rail powers relays or other inductive loads. VSS must be tied to ground at both pins 8 and 19 for proper ADC reference accuracy.
OTP memory cannot be erased: the PIC16C62B-04/SO program memory is one-time programmable, so a programming error bricks the device. Use the JW windowed variant for prototype development, and finalize firmware before committing to the SOIC-28 production parts. The MCLR pin (pin 1) is also the programming voltage input; ensure the MCLR pull-up is sized so that the ICSP programmer can drive it low. The PORTA RA4 pin is open-drain and requires a pull-up resistor to drive a logic-high output.
Route the oscillator traces (OSC1/OSC2, pins 9-10) as short as possible, guard them with a ground plane, and keep high-frequency digital signals away from these traces. With the 4 MHz grade, the oscillator is sensitive to capacitive loading; follow the Microchip datasheet section on oscillator design for the chosen mode (RC, LP, XT, or HS). The ADC inputs (RA0-RA3, RA5, and others shared with PORTB) should be guarded with analog ground if mixed-signal accuracy is required, and an external voltage reference on RA3 is recommended when the supply is noisy.
Compliance Information
RoHS and lead-free status not stated in the verified web snippets; PIC16C family legacy parts are typically supplied in matte-tin or SnPb finishes depending on distributor stock. AEC-Q100 not qualified - this part is not recommended for new automotive designs. Marked [DATA_NEEDED] where data is not available.
