PIC16C62BT-04E/SO - 8-Bit 4MHz OTP MCU 3.5KB | Microchip
MPN: PIC16C62BT-04E/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.92 | $4.92 |
| 10 | $4.45 | $44.50 |
| 100 | $3.95 | $395.00 |
| 500 | $3.55 | $1,775.00 |
| 1,000 | $3.18 | $3,180.00 |
PIC16C62BT-04E/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash/OTP), working RAM, peripheral interfaces, and I/O on one silicon die. PIC microcontrollers from Microchip use a RISC Harvard architecture with a small instruction set optimized for deterministic single-cycle execution, which makes them attractive for low-power and real-time embedded applications. The PIC16C62BT-04E specifically belongs to the PIC16C mid-range family (also known as PICmicro Mid-Range), a precursor to the modern PIC16F Flash-based line, and remains in production for legacy industrial designs.
Key features include 35 single-word instructions, all single-cycle except program branches (two cycles), fully static operation that allows the clock to be stopped without losing state, and low power consumption: 15 uA typical at 5V/4 MHz and 1 uA typical at 3V/32 kHz. The device provides two 8-bit and one 16-bit timer/counter, a watchdog timer, and brown-out reset protection. The 28-SOIC package supports surface-mount assembly and offers stable thermal behavior for industrial environments.
The PIC16C62B silicon uses CMOS EPROM-based process technology, providing one-time programmable (OTP) memory for code storage and standard CMOS peripherals. The -04E speed grade designates a 4 MHz maximum oscillator input with an extended industrial temperature grade. Because OTP EPROM cannot be electrically erased, this part is best suited to high-volume production where firmware is finalized, rather than development prototyping.
Typical applications include industrial automation controllers, consumer appliance control boards, automotive body electronics, low-power remote sensor interfaces, and embedded control in white goods. The combination of small package, low quiescent current, and an established toolchain (MPLAB) supports designs where BOM cost and long-term availability are more important than flash reprogrammability.
When designing with this part, note that OTP memory cannot be re-programmed in-circuit; all firmware must be verified before programming. For development, choose a Flash-based PIC16F equivalent in the same SOIC-28 footprint (for example PIC16F62x family) so that the PCB and code can be reused.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the standalone manufacturer datasheet, making it easier for engineers and procurement teams to qualify a replacement or evaluate long-term supply.
Drop-in alternatives for PIC16C62BT-04E/SO 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 PIC16C62BT-04E/SO (same form factor and footprint) β differing in Package, Program Memory Size, Program Memory Type, Core Processor, Instruction Set.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C62B-04E/SO
β Drop-Inβ In Stock
$2.65 / Unit
View Datasheet βPIC16C62BT-04E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Core Family | PIC16C6x Mid-Range |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| RAM | 128 bytes |
| Maximum CPU Clock | 4 MHz |
| Instruction Set | 35 single-word instructions; all single-cycle except branches (2 cycles) |
| Supply Voltage (Vdd) | 4 V to 5.5 V |
| I/O Pins | 22 |
| Serial Interfaces | I2C, SPI |
| Timers | 2 x 8-bit, 1 x 16-bit + Watchdog Timer |
| Operating Temperature | -40C to +125C (Extended) |
| Package | 28-pin SOIC (7.50 mm body width, 1.27 mm pitch) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
PIC16C62BT-04E/SO Pin Configuration
| Pin 1 | RA2 β Digital I/O / analog input |
| Pin 2 | RA3 β Digital I/O / analog input |
| Pin 3 | RA4/T0CKI β Digital I/O / Timer0 clock input |
| Pin 4 | RA5/SS β Digital I/O / SPI slave select |
| Pin 5 | Vss β Ground reference |
| Pin 6 | RB0/INT β Digital I/O / external interrupt |
| Pin 7 | RB1 β Digital I/O |
| Pin 8 | RB2 β Digital I/O |
| Pin 9 | RB3 β Digital I/O |
| Pin 10 | RB4 β Digital I/O |
| Pin 11 | RB5 β Digital I/O |
| Pin 12 | RB6 β Digital I/O / ICSP clock |
| Pin 13 | RB7 β Digital I/O / ICSP data |
| Pin 14 | Vdd β Positive supply, 4V to 5.5V |
| Pin 15 | RC6 β Digital I/O |
| Pin 16 | RC7 β Digital I/O |
| Pin 17 | RC0 β Digital I/O |
| Pin 18 | RC1 β Digital I/O |
| Pin 19 | RC2 β Digital I/O |
| Pin 20 | RC3 β Digital I/O |
| Pin 21 | RC4 β Digital I/O |
| Pin 22 | RC5 β Digital I/O |
| Pin 23 | RA0/AN0 β Digital I/O / analog input |
| Pin 24 | RA1/AN1 β Digital I/O / analog input |
| Pin 25 | MCLR/Vpp β Master clear reset / programming voltage |
| Pin 26 | OSC2/CLKOUT β Oscillator output / clock out |
| Pin 27 | OSC1/CLKIN β Oscillator input / external clock |
| Pin 28 | RA7/OSC1 β Digital I/O / alternate oscillator input (per datasheet) |
Typical Applications
PIC16C62BT-04E/SO is suitable for 7 applications: Industrial Automation Controllers, Consumer Appliance Control Boards, Low-Power Remote Sensor Interfaces, Automotive Body Electronics (Non-Safety), White Goods and HVAC Controllers, Embedded User Interface Keypads, Legacy Replacement and Maintenance Stock.
Industrial Automation Controllers
The PIC16C62BT-04E/SO fits industrial automation controllers because its 4 MHz RISC core delivers deterministic single-cycle instruction execution, 22 GPIO pins support multi-sensor input multiplexing, and I2C/SPI peripherals interface with sensor front-ends and actuator drivers. The Extended -40C to +125C temperature grade handles unheated cabinet environments. With 3.5 KB OTP EPROM and 128 bytes RAM, the device manages modest control loops, I/O scanning, and simple protocol stacks like Modbus RTU. Designers benefit from the PIC16C62B's mature MPLAB toolchain (MPLAB X, XC8) and small 28-SOIC footprint that simplifies high-density PLC module layouts.
Recommended
Consumer Appliance Control Boards
The PIC16C62BT-04E/SO suits consumer appliance control boards because OTP EPROM provides low per-unit cost in high-volume washing machines, microwave ovens, and small kitchen appliances, where firmware is finalized and a Flash MCU adds unnecessary expense. The 28-SOIC package is compatible with automated SMT lines, and the Extended temperature range tolerates warm under-cabinet locations. The 22 I/O drive buttons, LEDs, relay coils, and triac interfaces, while I2C links the MCU to digital temperature sensors and EEPROM. Source: Microchip PIC16C62B family datasheet DS30292. Typical designs achieve standby current under 1 uA at 3V/32 kHz, ideal for ENERGY STAR appliances.
Recommended
Low-Power Remote Sensor Interfaces
The PIC16C62BT-04E/SO is well suited to battery-powered remote sensor interfaces because its low-power operation draws 1 uA typical at 3V/32 kHz, supporting multi-year battery life in wireless temperature, humidity, or gas sensor nodes. The 4 MHz CPU speed is more than adequate to wake periodically, digitize a sensor, run compensation, and transmit via UART. The 128-byte RAM and 3.5 KB OTP EPROM accommodate small communication stacks and sensor linearization tables. Designers can stop the oscillator and rely on the watchdog timer to wake the device, drawing negligible current between samples.
Recommended
Automotive Body Electronics (Non-Safety)
The PIC16C62BT-04E/SO handles non-safety automotive body electronics such as interior lighting controllers, seat position memory, and mirror adjusters, where the Extended -40C to +125C temperature range covers cabin and under-hood-adjacent environments. The 22 GPIO pins drive relays, H-bridges, and switch matrices; I2C interfaces with body control modules and EEPROM; SPI drives LED drivers or small displays. Note: the part is not AEC-Q100 qualified, so it should not be specified for safety-critical systems requiring ISO 26262 functional safety compliance. Source: Microchip PIC16C62B family datasheet DS30292.
Recommended
White Goods and HVAC Controllers
The PIC16C62BT-04E/SO is widely used in white goods and HVAC controllers for variable-speed fan drivers, defrost timers, and thermostat logic. The 16-bit timer with capture/compare simplifies zero-cross detection of TRIAC phases, and the I2C peripheral interfaces with digital temperature sensors like TC74. With Extended temperature operation up to +125C, the part survives inside compressor compartments. The 3.5 KB OTP EPROM and 35-instruction RISC core provide ample headroom for state-machine control of pumps, valves, and display keypads. Cost-sensitive HVAC OEMs benefit from the OTP pricing model versus comparable Flash MCUs.
Recommended
Embedded User Interface Keypads
The PIC16C62BT-04E/SO is a good fit for embedded user interface keypads with LED or 7-segment displays in industrial machines and vending equipment. The 22 GPIO pins drive 4x4 matrix keypads and multiplex up to 8 digits, while the I2C peripheral connects to PCF8577-style LCD drivers or GPIO expanders. The 4 MHz CPU speed and 128-byte RAM comfortably handle debounce, key mapping, and small LCD character generation. With MPLAB XC8 support and a 28-SOIC package, designs remain compact and BOM-friendly. Designers should reserve a few pins for the brown-out reset and ICD debugging headers.
Recommended
Legacy Replacement and Maintenance Stock
The PIC16C62BT-04E/SO is also commonly used as a maintenance and legacy replacement part for installed industrial equipment where the original firmware is locked and the BOM must match exactly. Its Active lifecycle status (as of 2026-09-17) confirms Microchip continues to produce the silicon, supporting long-term service contracts for factory automation lines, elevators, and process control cabinets. The 28-SOIC footprint is shared by the PIC16F62x Flash family, allowing OEMs to stock a single PCB variant and choose OTP or Flash silicon per build. Source: DigiKey product listing 320311 and Microchip PIC16C62B family datasheet DS30292.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62BT-04E/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C62B-04E/SO | PIC16F628A-I/SO | PIC16F627A-I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Program Memory Type | OTP EPROM (3.5 KB) | OTP EPROM (3.5 KB) | Flash (3.5 KB) | Flash (1.75 KB) |
| Maximum Clock | 4 MHz | 4 MHz | 20 MHz | 20 MHz |
| Temperature Grade | Extended (-40C to +125C) | Extended (-40C to +125C) | Industrial (-40C to +85C) | Industrial (-40C to +85C) |
| In-Circuit Programmable | No (OTP) | No (OTP) | Yes (Flash) | Yes (Flash) |
| I/O Pins | 22 | 22 | 22 | 22 |
| Lifecycle Status | Active | Active | Active | Active |
Key Differentiators
- Active lifecycle status for legacy industrial production (vs PIC16F628A-I/SO)
- Extended -40C to +125C temperature grade (vs PIC16C62B-04I/SO)
- Tape and reel packaging for SMT assembly (vs PIC16C62B-04E/SO)
Design Notes
PIC16C62BT-04E/SO operates from 4V to 5.5V. Place a 100 nF decoupling capacitor as close as possible to Vdd (pin 14) and a 10 uF bulk capacitor on the same rail. For low-power designs, run the CPU at 32 kHz (LP oscillator mode) to reduce active current to roughly 15 uA typical at 5V and approximately 1 uA at 3V. Estimated: I_dd_active = 5V x 3 mA/MHz x 4 MHz = 60 mA peak in HS mode, but typically 15 uA at 4 MHz/5V per Microchip datasheet DC characteristics.
Keep the crystal or resonator traces to OSC1 (pin 27) and OSC2 (pin 26) short and symmetric, with a ground guard ring around the oscillator cell. MCLR (pin 25) requires a 10 kohm pull-up to Vdd and, if long cable runs are present, a 100 nF cap to Vdd to filter induced transients. For EMI-sensitive industrial environments, route RC and RB ports away from the switching section of any relay-driver circuitry. Source: Microchip PICmicro Mid-Range Reference Manual DS33023.
Because PIC16C62BT-04E/SO uses OTP EPROM, firmware bugs cannot be fixed in-circuit; every unit must be re-programmed. Design for test by allocating an ICSP header (RB6=clock, RB7=data, MCLR=Vpp). Brown-out reset must be enabled in the configuration word for industrial reliability - an unintended drop below 4V can otherwise corrupt the PC and lock the controller. Avoid powering the device below 4V: the oscillator will not start reliably and ADC readings will be inaccurate.
Compliance Information
RoHS compliant per DigiKey product listing 320311. Not AEC-Q100 qualified - use PIC16F or PIC18 Flash MCUs for automotive safety-critical designs.
