PIC16C62A-04E/SO - 4MHz 8-bit CMOS MCU, 3.5KB EPROM | Microchip
MPN: PIC16C62A-04E/SO β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $8.95 | $8.95 |
| 10 | $7.85 | $78.50 |
| 100 | $6.5 | $650.00 |
| 500 | $5.4 | $2,700.00 |
| 1,000 | $4.75 | $4,750.00 |
PIC16C62A-04E/SO Overview
An 8-bit microcontroller (MCU) is a small single-chip computer built around an 8-bit data path and a von Neumann or Harvard instruction set, integrating CPU core, program memory, RAM, timers, and I/O peripherals onto one die. Within the broader taxonomy, the PIC16C62A belongs to Microchip's PIC16C mid-range family, which sits between the baseline PIC10/12/16 families and the high-performance PIC18 family. These OTP-EPROM microcontrollers are part of the power management and embedded control semiconductor category, historically used wherever deterministic real-time response, low power, and high code density matter more than raw computational throughput.
Key features of the PIC16C62A-04E/SO include low-power CMOS EPROM/ROM technology with a fully static design that allows the clock to be stopped without losing state, a wide operating voltage range of 2.5 V to 6.0 V (per family specifications), and typical active current of 2 mA at 5 V / 4 MHz. Power-saving sleep mode draws as little as 1 uA typical at 3 V / 32 kHz, making the part suitable for battery-backed or sleep-dominated applications. The device offers programmable code protection, an 8-bit timer/counter with optional prescaler, a watchdog timer with its own on-chip RC oscillator, and a synchronous serial port (SSP) supporting SPI and I2C master/slave modes.
Architecturally, the PIC16C62A employs Microchip's mid-range 14-bit RISC instruction set with 35 single-word instructions, where most instructions execute in a single instruction cycle (4 oscillator clocks). The 8-level deep hardware stack, two file select registers, and direct/indirect/inherent addressing modes give C programmers and assembly engineers flexible control over code placement. The Harvard architecture separates program and data buses so the CPU can fetch the next instruction while reading or writing data memory, eliminating von Neumann bottlenecks.
Typical applications for the PIC16C62A-04E/SO include industrial control and sensor interfacing, automotive body and chassis subsystems (Extended temperature grade), consumer appliance controllers, HVAC equipment, low-end security and alarm panels, and remote sensor nodes that benefit from OTP cost savings in high-volume production. Its combination of OTP EPROM, low power, and 22 I/O pins makes it well suited for cost-sensitive embedded applications that have stabilized firmware.
When designing with this part, note that OTP EPROM cannot be re-programmed in-circuit - firmware bugs require a new device - so plan for a flash-based PIC16F equivalent during development and prototyping. The 28-pin SOIC wide-body footprint is shared with many PIC16C and PIC16F family members, enabling direct migration paths when re-programmability becomes desirable.
Drop-in alternatives for PIC16C62A-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 PIC16C62A-04E/SO (same form factor and footprint) β differing in Operating Temperature Range, Timers, Program Memory Size, Program Memory Type, RAM Size.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F62A-I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C62B-04E/SO
β Drop-Inβ In Stock
$2.65 / Unit
View Datasheet βPIC16C62A-04I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C62A-04/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C62AT-04E/SO
β Drop-Inβ In Stock
$3.45 / Unit
View Datasheet βPIC16F627A-I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C62A-04E/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Mid-Range) |
| Instruction Set Width | 14-bit |
| Maximum Clock Frequency | 4 MHz |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM Size | 128 bytes |
| Data EEPROM | Not present |
| I/O Pins | 22 |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Operating Temperature Range | -40C to +125C (Extended, "E") |
| Package | 28-pin SOIC (0.295", 7.50 mm width) |
| Mounting Type | Surface Mount |
| Number of Instructions | 35 |
| Instruction Cycle Time | 4 x Tosc (1 us at 4 MHz) |
| Timers | Timer0 (8-bit) with prescaler; WDT with dedicated RC oscillator |
| Communication Interfaces | SSP (SPI / I2C master & slave) |
| Power-Saving Mode | Sleep (typical 1 uA at 3 V, 32 kHz) |
| Typical Active Current | 2 mA at 5 V, 4 MHz |
| Programmable Code Protection | Yes |
| ICSP / In-Circuit Programming | Not supported on OTP EPROM |
| RoHS Status | Non-compliant (contains lead in OTP windowed variants); SOIC package is lead-free but reports vary |
| MSL Level | 1 (unlimited floor life) |
PIC16C62A-04E/SO Pin Configuration
| Pin 1 | /MCLR β Master Clear (reset) input, active low; programming voltage input |
| Pin 2 | RA0/AN0 β Port A bit 0 / analog channel 0 |
| Pin 3 | RA1/AN1 β Port A bit 1 / analog channel 1 |
| Pin 4 | RA2/AN2 β Port A bit 2 / analog channel 2 |
| Pin 5 | RA3/AN3 β Port A bit 3 / analog channel 3 |
| Pin 6 | RA4/T0CKI β Port A bit 4 / Timer0 clock input |
| Pin 7 | RA5 β Port A bit 5 |
| Pin 8 | VSS β Ground reference |
| Pin 9 | OSC1 β Crystal oscillator input |
| Pin 10 | OSC2 β Crystal oscillator output |
| Pin 11 | RC0 β Port C bit 0 |
| Pin 12 | RC1 β Port C bit 1 |
| Pin 13 | RC2 β Port C bit 2 |
| Pin 14 | RC3 β Port C bit 3 / SPI SCK or I2C SCL |
| Pin 15 | RC4 β Port C bit 4 / SPI SDI or I2C SDA |
| Pin 16 | RC5/SDO β Port C bit 5 / SPI serial data out |
| Pin 17 | RC6 β Port C bit 6 |
| Pin 18 | RC7 β Port C bit 7 |
| Pin 19 | VSS β Ground reference (second VSS pin) |
| Pin 20 | VDD β Positive supply (2.5 V to 6.0 V) |
| Pin 21 | RB0/INT β Port B bit 0 / external interrupt input |
| Pin 22 | RB1 β Port B bit 1 |
| Pin 23 | RB2 β Port B bit 2 |
| Pin 24 | RB3 β Port B bit 3 |
| Pin 25 | RB4 β Port B bit 4 |
| Pin 26 | RB5 β Port B bit 5 |
| Pin 27 | RB6 β Port B bit 6 |
| Pin 28 | RB7 β Port B bit 7 |
Typical Applications
PIC16C62A-04E/SO is suitable for 6 applications: Industrial Sensor Interface Module, Automotive Body Control Subsystem, Consumer Appliance Control Board, HVAC Thermostat and Damper Controller, Low-End Security and Alarm Panel, Remote Sensor Node / Battery Telemetry.
Industrial Sensor Interface Module
The PIC16C62A-04E/SO fits industrial sensor-interface modules that digitize analog signals from 4-20 mA loops, thermocouples, or RTDs and report measurements via SPI to a host controller. The MCU's 22 I/O pins accept multiple analog inputs through the ADC multiplexer (with external analog mux expansion), while the SSP port streams converted data to a gateway. At 4 MIPS the 14-bit core can service interrupt-driven conversions at sub-millisecond latency. Extended temperature range (-40C to +125C) tolerates factory-floor ambient swings. The wide 2.5 V to 6.0 V supply range supports direct 5 V industrial rails without LDO staging.
Recommended
Automotive Body Control Subsystem
The PIC16C62A-04E/SO targets cost-sensitive automotive body modules such as seat controllers, mirror adjusters, and interior lighting nodes where the Extended -40C to +125C temperature grade is mandatory. The OTP EPROM is appropriate for high-volume, frozen-firmware applications where per-unit programming cost matters more than field updates. 22 I/O pins drive relays, H-bridges, and LED matrices directly through current-limit resistors. The 4 MHz clock and 35-instruction RISC core execute body-control state machines with deterministic timing. Pin-compatible migration to PIC16F62A preserves the PCB layout for production lines that later require firmware updates.
Recommended
Consumer Appliance Control Board
The PIC16C62A-04E/SO serves as the main controller in white-goods appliances such as washing machines, dishwashers, and microwave ovens where OTP EPROM cost advantages dominate. The 4 MHz mid-range core sequences motor drivers, reads keypads, drives 7-segment or LCD displays, and monitors safety interlocks via the watchdog timer. Low sleep current (1 uA typical at 3 V, 32 kHz) suits battery-backed clock and timer functions in ovens and clocks. 22 I/O pins comfortably accommodate H-bridge direction/enable lines, sensor inputs, and user-interface LEDs.
Recommended
HVAC Thermostat and Damper Controller
The PIC16C62A-04E/SO is suitable for HVAC thermostat and zone-damper control boards, providing deterministic cycle execution at 1 us per instruction for proportional-integral control loops. Its 22 I/O pins interface with NTC thermistors (via ADC channel or external analog comparator), triac-fired heater stages, and 24 VAC transformer-isolated logic inputs. Extended temperature tolerance matches equipment-room ambient. The internal watchdog timer with dedicated RC oscillator ensures the controller recovers from brown-out or RF-induced lockups without external components.
Recommended
Low-End Security and Alarm Panel
The PIC16C62A-04E/SO fits wired alarm panels and PIR-sensor signal-conditioning nodes where OTP EPROM prevents firmware tampering by unauthorized parties. The 22 I/O pins scan multiple normally-closed loop zones, drive piezo buzzers, and key in keypad matrices with minimal external logic. Sleep current at 1 uA extends backup-battery life during AC power loss - critical for UL-listed security installations. The synchronous serial port (SSP) supports SPI communication with radio modules or downstream keypads, and the watchdog timer ensures the panel resets itself if firmware execution stalls.
Recommended
Remote Sensor Node / Battery Telemetry
The PIC16C62A-04E/SO is suited for battery-powered remote sensor nodes in agricultural, environmental, or utility-meter reading applications. Sleep mode at 1 uA typical (3 V, 32 kHz) keeps quiescent drain negligible between measurement cycles, and the wide supply range supports direct LiSOCl2 or alkaline battery stacks without regulation. The SSP port interfaces with low-power radio modules such as RFM69 or LoRa transceivers. OTP EPROM is acceptable because firmware is frozen at production and the node is sealed against field updates - tamper resistance is a feature, not a limitation.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C62A-04E/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F62A-I/SO | PIC16C62B-04E/SO | PIC16C62A-04I/SO | PIC16C62A-04/SO | PIC16F627A-I/SO |
|---|---|---|---|---|---|---|
| Package | 28-SOIC (0.295", 7.50 mm) | 28-SOIC (0.295", 7.50 mm) - same | 28-SOIC (0.295", 7.50 mm) - same | 28-SOIC (0.295", 7.50 mm) - same | 28-SOIC (0.295", 7.50 mm) - same | 28-SOIC (0.295", 7.50 mm) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP EPROM (3.5 KB) | Flash (3.5 KB) - reprogrammable | OTP EPROM (3.5 KB) - identical | OTP EPROM (3.5 KB) - identical | OTP EPROM (3.5 KB) - identical | Flash (1.75 KB) - smaller |
| Maximum Clock Frequency | 4 MHz | 20 MHz - 5x faster | 4 MHz - identical | 4 MHz - identical | 4 MHz - identical | 20 MHz - 5x faster |
| Operating Temperature Range | -40C to +125C (Extended, "E") | -40C to +85C (Industrial, "I") | -40C to +125C (Extended, "E") | -40C to +85C (Industrial, "I") | 0C to +70C (Commercial, "C") | -40C to +85C (Industrial, "I") |
| RAM Size | 128 bytes | 128 bytes - identical | 128 bytes - identical | 128 bytes - identical | 128 bytes - identical | 224 bytes - 75% more |
| I/O Pins | 22 | 22 - identical | 22 - identical | 22 - identical | 22 - identical | 16 - 6 fewer |
| In-Circuit Programming | Not supported (OTP EPROM) | ICSP supported | Not supported (OTP EPROM) | Not supported (OTP EPROM) | Not supported (OTP EPROM) | ICSP supported |
| Lifecycle Status (2026-09-17) | Obsolete | Active | Obsolete | Obsolete | Obsolete | Active |
Key Differentiators
- Active flash-based successor with identical footprint (vs PIC16F62A-I/SO)
- Higher-frequency drop-in upgrade within the same silicon family (vs PIC16C62A-10/SO)
- Brown-out reset and improved oscillator stability on B revision (vs PIC16C62B-04E/SO)
Design Notes
Estimated: at 5 V supply and 4 MHz active clock, typical active current is 2 mA (1.2 mA quiescent + 0.8 mA I/O drive) per the PIC16C62A datasheet. Add 10 uF bulk + 100 nF ceramic decoupling placed within 10 mm of the VDD pin (pin 20), with a second 100 nF near pin 8 (VSS) to suppress digital switching noise on the analog reference. For battery-backed designs, route a diode-OR between the main rail and a backup supercapacitor or coin cell, and use the PIC's sleep mode (1 uA typical at 3 V, 32 kHz) for quiescent periods.
The OTP EPROM cannot be re-programmed in-circuit. Each firmware bug requires a brand-new device, so use a flash-based PIC16F62A or PIC16F627A for development and qualification, then migrate to OTP only for locked production firmware. Also note that /MCLR (pin 1) must NOT be left floating - tie it through a 10 kohm resistor to VDD to avoid spurious resets. If using a crystal, keep traces short and surround the oscillator pins with a ground guard ring to avoid EMI injection.
Route the oscillator traces (OSC1 pin 9, OSC2 pin 10) on the top layer with the crystal within 5 mm of the MCU, and surround the pair with a grounded copper pour to isolate them from switching noise. Keep RC3/RC4/RC5 (pins 14-16, the SPI/I2C bus) away from the oscillator and from RB port lines that switch high-current loads. Both VSS pins (8 and 19) must be tied to the ground plane directly with vias, not traces, to minimize ground bounce during I/O transitions.
Estimated: with 22 I/O pins and no internal slew-rate control, place 22-100 ohm series resistors on high-speed outputs that drive cables or long PCB traces to dampen ringing. The SSP port (RC3/RC4/RC5) supports SPI up to Fosc/4 = 1 MHz at the rated 4 MHz clock - terminate the SCK line with a 10 kohm pull-up if multiple SPI slaves share the bus, and verify that all SPI peripherals use the same clock-edge / clock-polarity configuration in firmware before layout.
Compliance Information
RoHS status for PIC16C62A-04E/SO is not consistently reported across distributors; the SOIC package itself is lead-free, but the OTP EPROM die may use legacy wafer processes. The Extended temperature grade (-40C to +125C) makes the part suitable for industrial and many automotive under-hood applications, but the part is NOT AEC-Q100 qualified - automotive safety-critical designs should use AEC-Q100-qualified flash parts such as PIC16F62A-E/SO or dsPIC33 variants.
