PIC16C622A-40/P - 8-Bit EPROM MCU, 3.5KB, 40MHz, PDIP-18
MPN: PIC16C622A-40/P β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.95 | $975.00 |
| 1,000 | $1.74 | $1,740.00 |
PIC16C622A-40/P Overview
The PIC16C622A is part of the PIC16C62X family of 18 and 20-pin ROM/EPROM-based microcontrollers. An EPROM-based MCU (Erasable Programmable Read-Only Memory microcontroller) is a member of the broader 8-bit microcontroller category and sits inside the larger hierarchy of microcontrollers -> embedded microcontrollers -> microprocessors -> semiconductors. EPROM-based parts are one-time or window-erasable and are typically used for prototype development and low-volume production where Flash-based devices are not yet validated.
Key features include 13 I/O pins with individual direction control, one 8-bit timer (TMR0) with an 8-bit prescaler, a Watchdog Timer with its own on-chip RC oscillator for reliable recovery, Power-on Reset, Power-up Timer, and Oscillator Start-up Timer. The integrated analog comparator supports up to four input channels via the AN0-AN3 pins, enabling direct interface with analog sensors without an external op-amp. The CMOS process provides low power consumption, with a typical supply current of only a few milliamps at full clock.
Architecturally, the PIC16C622A uses a Harvard-style RISC core with a 14-bit instruction word and an 8-bit data path. The 35-instruction set, all single-cycle except branches, simplifies coding and timing analysis. The device supports external crystal, ceramic resonator, or RC oscillator configurations, plus a low-power LP oscillator option for battery-powered designs. The EPROM cell enables window-erasable prototype iteration when the JW package variant is used.
Typical applications include appliance control, automotive body electronics, industrial sensor interfaces, low-cost remote controls, and consumer white goods where the integrated comparator simplifies analog front-end design. Compared with mask-ROM siblings, the EPROM variant is preferred for engineering samples and pre-production runs.
Designers should note that the PIC16C622A is OTP (One-Time Programmable) in the plastic PDIP package and is not re-programmable in-circuit; verify firmware carefully before programming. The 40MHz speed grade requires a 10MHz input clock at the maximum 4:1 PLL-less oscillator configuration.
This page synthesizes distributor stock and pricing, drop-in EPROM/Flash equivalents in the same PDIP-18 footprint, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16C622A-40/P 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 PIC16C622A-40/P (same form factor and footprint) β differing in Package, Product Type, Mounting Type, ADC, Instruction Set.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F88-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F1825-I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16C621A-40/P
β Drop-Inβ In Stock
$0.49 / Unit
View Datasheet βPIC16C622-40/P
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16C622A-04E/P
β Drop-Inβ In Stock
$1.3 / Unit
View Datasheet βPIC16C622A-40/P Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit Microcontroller (EPROM/ROM-based) |
| Family | PIC16C62X (PICmicro mid-range) |
| Program Memory Type | EPROM (OTP in PDIP package) |
| Program Memory Size | 3.5 KB (2K x 14 words) |
| RAM Size | 128 bytes |
| Maximum CPU Frequency | 40 MHz |
| Supply Voltage Range | 2.5 V to 5.5 V (3.3 V / 5 V nominal) |
| Number of I/O Pins | 13 |
| Timers | 1 x 8-bit (TMR0) with prescaler |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Analog Comparator | Yes, 1 (4 input channels via AN0-AN3) |
| ADC | None (no integrated ADC) |
| Instruction Set | 35 single-word instructions (14-bit wide) |
| Oscillator Modes | XT, HS, LP, RC (external crystal/resonator/RC) |
| Package | 18-pin PDIP (Plastic DIP, 0.300 inch / 7.62mm pitch) |
| Operating Temperature | 0C to +70C (commercial grade) |
| Mounting Type | Through-Hole |
| Tube Quantity | 25 pcs per tube (per industry standard) |
PIC16C622A-40/P Pin Configuration
| Pin 1 | RA2/AN2 β Bidirectional I/O / analog comparator input 2 |
| Pin 2 | RA3/AN3 β Bidirectional I/O / analog comparator input 3 |
| Pin 3 | RA4/T0CKI β Bidirectional I/O / TMR0 external clock input |
| Pin 4 | MCLR/VPP β Master Clear (Reset) input / programming voltage |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RB0/INT β Bidirectional I/O / external interrupt input |
| Pin 7 | RB1 β Bidirectional I/O |
| Pin 8 | RB2 β Bidirectional I/O |
| Pin 9 | RB3 β Bidirectional I/O |
| Pin 10 | RB4 β Bidirectional I/O |
| Pin 11 | RB5 β Bidirectional I/O |
| Pin 12 | RB6 β Bidirectional I/O |
| Pin 13 | RB7 β Bidirectional I/O |
| Pin 14 | VDD β Positive supply (2.5V to 5.5V) |
| Pin 15 | OSC2/CLKOUT β Oscillator crystal output / clock output |
| Pin 16 | OSC1/CLKIN β Oscillator crystal input / external clock input |
| Pin 17 | RA0/AN0 β Bidirectional I/O / analog comparator input 0 |
| Pin 18 | RA1/AN1 β Bidirectional I/O / analog comparator input 1 |
Typical Applications
PIC16C622A-40/P is suitable for 6 applications: Appliance Control Boards, Automotive Body Electronics, Industrial Sensor Interfaces, Remote Control Transmitters, Consumer White Goods (Coffee Makers, Toasters), Hobbyist and Educational Boards.
Appliance Control Boards
The PIC16C622A-40/P is well suited to appliance control boards (washing machines, dishwashers, microwave ovens) because its 3.5 KB EPROM holds state-machine firmware plus lookup tables, while the integrated analog comparator directly senses line-voltage-derived signals via a resistive divider on AN0-AN3. The 40 MHz instruction throughput executes sensor-scan loops in microseconds, comfortably debouncing mechanical switches and timing relay drivers. OTP EPROM security prevents firmware extraction by competing service shops, which matters for brand-protection in white goods.
Recommended
Automotive Body Electronics
In automotive body modules (mirror control, seat-position memory, lighting drivers) the PIC16C622A-40/P delivers 13 digital I/O to drive relays and read switches without an external I/O expander. The 2.5 V to 5.5 V supply range tolerates load-dump transients when paired with proper bulk capacitance. The integrated comparator monitors current-sense signals from lamp drivers. Designers should note the commercial 0C to +70C temp range is too narrow for under-hood modules; choose -40C to +125C industrial grade or PIC16F88-I/P instead.
Recommended
Industrial Sensor Interfaces
Sensor interface modules (4-20 mA loop readers, thermistor bridges, photodiode amplifiers) benefit from the PIC16C622A-40/P's integrated analog comparator, which converts low-level analog signals directly to digital interrupts without an external op-amp. The 8-bit TMR0 with prescaler generates precise time bases for sensor-sampling windows. The Watchdog Timer recovers the MCU from firmware lockups caused by EMI in factory-floor environments. EPROM OTP security protects calibration coefficients embedded in firmware.
Recommended
Remote Control Transmitters
Low-cost IR/RF remote controls use the PIC16C622A-40/P to encode button presses into Manchester or pulse-width modulation without an external encoder IC. The 13 I/O directly scan 6x3 matrix keypads, while TMR0 generates precise carrier frequencies (typically 38 kHz for IR). EPROM OTP prevents code extraction, protecting proprietary encoding schemes. The 2.5 V to 5.5 V supply enables two-AA-battery operation; quiescent current in sleep mode extends battery life to years.
Recommended
Consumer White Goods (Coffee Makers, Toasters)
Small kitchen appliances leverage the PIC16C622A-40/P's integrated comparator to monitor temperature via NTC thermistor divider networks, eliminating an external op-amp and reducing BOM cost. The 13 I/O drive LEDs, triac-based heater control, and buzzer feedback directly. The 35-instruction RISC core simplifies coding for non-engineering teams. EPROM OTP is acceptable in this price-sensitive market where firmware rarely changes after release.
Recommended
Hobbyist and Educational Boards
The PIC16C622A-40/P appears in legacy hobbyist designs and educational microcontroller trainers because of its simple 35-instruction RISC architecture, easy-to-program EPROM (via MPLAB PM3), and forgiving 2.5 V to 5.5 V supply. The integrated analog comparator introduces students to mixed-signal interfacing without an ADC. For new courses, instructors should consider PIC16F88-I/P instead, since it adds in-circuit debugging and eliminates the EPROM eraser step.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C622A-40/P β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F88-I/P | PIC16F1825-I/P | PIC16C621A-40/P | PIC16C622-40/P | PIC16C622A-04E/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-18 (Through-Hole) | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same |
| Program Memory | 3.5 KB EPROM (OTP) | 4 KB Flash | 8 KB Flash | 2 KB EPROM | 3.5 KB EPROM | 3.5 KB EPROM |
| Memory Type | EPROM (OTP) | Flash (reprogrammable) | Flash (reprogrammable) | EPROM (OTP) | EPROM (OTP) | EPROM (OTP) |
| Max Clock Speed | 40 MHz | 20 MHz | 32 MHz | 40 MHz | 40 MHz | 4 MHz |
| Integrated ADC | None | 10-bit ADC | 10-bit ADC | None | None | None |
| Analog Comparator | 1 (4 inputs) | 2 comparators | 2 comparators | 1 (4 inputs) | 1 (4 inputs) | 1 (4 inputs) |
| Lifecycle Status | NRND | Active | Active | NRND | NRND | NRND |
Key Differentiators
- Faster 40 MHz clock speed grade vs most C62x siblings (vs PIC16C621A-40/P)
- EPROM OTP security for firmware protection (vs PIC16F88-I/P)
- Integrated analog comparator without ADC overhead (vs PIC16F1825-I/P)
Design Notes
Decouple VDD (pin 14) with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk capacitor on the supply rail. The PIC16C622A-40/P draws approximately 5-10 mA at 40 MHz with all I/O active; in sleep mode it drops below 1 uA when the Watchdog Timer is disabled. Ensure the bulk capacitor handles the in-rush current when MCLR is released.
For through-hole PDIP-18, route the oscillator traces (OSC1/OSC2) on the top layer, keep them short (<10 mm), and surround them with a ground pour to minimize EMI pickup. Place the MCLR pull-up resistor (typically 10 kOhm) close to pin 4. If using a crystal, place load capacitors (typically 15-33 pF) immediately at the oscillator pins, with the ground side returning to the same ground reference as VSS (pin 5).
The PIC16C622A-40/P is OTP (One-Time Programmable) in the plastic PDIP package - it CANNOT be re-programmed once written. Verify firmware thoroughly using the JW window-erasable ceramic package variant during development, then commit to OTP plastic for production. Do not exceed the absolute maximum VDD of 7.0 V, and observe the MCLR/VPP voltage limits during in-circuit programming (typically 13 V for high-voltage programming).
Compliance Information
RoHS/REACH status unknown - EPROM PDIP parts are often non-RoHS due to the lead in the through-hole pin finish. AEC-Q100 not qualified (commercial 0C to +70C grade only); choose industrial or PIC16F automotive equivalents for vehicle applications.
