PIC16CE624T-20I/SO - 8-Bit 20MHz OTP MCU, 1.75KB, EEPROM | Microchip
MPN: PIC16CE624T-20I/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.94 | $1,470.00 |
| 1,000 | $2.52 | $2,520.00 |
PIC16CE624T-20I/SO Overview
A PIC microcontroller (Peripheral Interface Controller) is a compact RISC-style 8-bit microprocessor family originally developed by General Instrument and popularised by Microchip Technology. PIC MCUs integrate CPU core, non-volatile program memory (ROM/EPROM/Flash/OTP), data memory (RAM), EEPROM, timers, ADC, comparators, communication peripherals (UART, SPI, I2C), and interrupt logic into a single chip. Within that taxonomy, the PIC16CE62X family is a cost-optimised 18-/20-pin OTP line with on-chip EEPROM data memory, positioned between baseline 12C/16C5X devices and larger Flash-based PIC16F/PIC18 families. These parts are well suited to legacy designs, low-volume OTP-validated products, and educational platforms.
Key features of the PIC16CE624T-20I/SO include operation across a 3.0V to 5.5V supply range, an industrial -40C to +85C temperature grade, low-power CMOS technology, only 35 single-word instructions, and PIC16C5X/PIC12CXXX upward code compatibility. All instructions execute in a single 200ns cycle except branches, which are two-cycle. The 128-byte on-chip EEPROM is byte-erasable and supports long-term data retention, eliminating an external serial EEPROM in many designs.
Architecturally, the PIC16CE624 uses Microchip's enhanced mid-range core with a 14-bit instruction word and an 8-bit data path, two comparators with programmable reference, POR and brown-out reset, a WDT, and a 13-bit program counter that supports 8K x 14 of program addressing space. The OTP memory is one-time programmable and uses EPROM cells rather than flash.
Typical applications include low-cost appliance controls, battery chargers, simple sensor signal conditioning, LED drivers, security keypads, and consumer electronics. The on-chip comparators and programmable VREF also support power-supply monitoring and threshold-detection circuits. Industrial designers use the PIC16CE624T-20I/SO where code stability, EEPROM data storage, and an industrial temperature rating are required in a small 18-pin SOIC outline.
When designing with this part, note that OTP memory cannot be re-programmed in-circuit, so production programming must be done on a programmer before PCB assembly; for in-system reprogrammability consider the flash-based PIC16F684 or PIC16F88 family. Also allow proper decoupling on VDD/VDD2 and route the MCLR/VPP pin per Microchip's in-circuit serial programming (ICSP) recommendations. The PIC16CE624 family is now in NRND/EOL status in some variants; verify long-term supply before new design-in.
This page synthesises distributor pricing, drop-in same-package alternatives drawn from the PIC16CE62X family, and practical engineering notes not found in any single datasheet.
Drop-in alternatives for PIC16CE624T-20I/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 PIC16CE624T-20I/SO (same form factor and footprint) — differing in Instruction Cycle Time, Core Architecture, Package, Program Memory Type, RoHS Status.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE624-20I/SO
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC16CE624-20E/SO
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC16CE624T-20/SO
✅ Drop-In✓ In Stock
$3.32 / Unit
View Datasheet →PIC16CE623-20I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624T-04I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624-04I/SO
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC16CE624T-20I/SO Maximum Ratings & Electrical Characteristics
| Core Processor | PIC |
| Core Size | 8-Bit |
| Core Series | PIC16C |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle Time | 200 ns (single-cycle) |
| Clock / Speed | 20 MHz max |
| Program Memory Size | 1.75 KB (1K x 14) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM Size | 96 x 8 bytes |
| EEPROM Size | 128 x 8 bytes |
| Number of I/O Pins | 13 |
| Supply Voltage (Vcc/Vdd) | 3.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Oscillator Type | External |
| Peripherals | Brown-out Detect/Reset, POR, WDT |
| Comparators | 2 on-chip analog comparators |
| Programmable Voltage Reference | Yes |
| Connectivity | - |
| Package / Case | 18-SOIC (0.295 inch / 7.50 mm body width) |
| Mounting Type | Surface Mount |
| RoHS Status | Lead free / RoHS Compliant (per distributor listing) |
PIC16CE624T-20I/SO Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (active-low reset) / ICSP programming voltage input |
| Pin 2 | RA0/AN0 — PORTA bit 0 / analog comparator input |
| Pin 3 | RA1/AN1 — PORTA bit 1 / analog comparator input |
| Pin 4 | RA2/AN2 — PORTA bit 2 / analog comparator input or output |
| Pin 5 | RA3/AN3 — PORTA bit 3 / analog comparator input |
| Pin 6 | RA4/T0CKI — PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/SS/AN4 — PORTA bit 5 / slave-select input / comparator input |
| Pin 8 | OSC1/CLKIN — External oscillator input / external clock input |
| Pin 9 | OSC2/CLKOUT — External oscillator output / clock output |
| Pin 10 | VSS — Ground reference |
| Pin 11 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
| Pin 12 | RB0/INT — PORTB bit 0 / external interrupt input |
| Pin 13 | RB1 — PORTB bit 1 |
| Pin 14 | RB2 — PORTB bit 2 |
| Pin 15 | RB3 — PORTB bit 3 |
| Pin 16 | RB4 — PORTB bit 4 / interrupt-on-change |
| Pin 17 | RB5 — PORTB bit 5 / interrupt-on-change |
| Pin 18 | RB6 — PORTB bit 6 / interrupt-on-change / ICSP clock |
Typical Applications
PIC16CE624T-20I/SO is suitable for 7 applications: Appliance Control Board, Battery Charger Controller, Security Keypad and Access Control, Industrial Sensor Signal Conditioning, LED Display and Lighting Controller, Educational Microcontroller Trainer Board, Simple Sensor Hub and Data Logger.
Appliance Control Board
The PIC16CE624T-20I/SO fits appliance control boards (washing machines, microwave ovens, dishwashers) because its 13 digital I/O pins can directly drive triacs, relays, and key-matrix keypads without external logic. The integrated 128-byte EEPROM stores user settings, error logs, and calibration constants that survive power cycles, eliminating an external serial EEPROM IC. At 20 MHz the 200ns instruction cycle easily handles 50/60Hz zero-cross detection and PWM for motor speed or heating element control, while the industrial -40C to +85C temperature grade tolerates the thermal environment inside consumer appliances.
Recommended
Battery Charger Controller
Smart NiCd/NiMH/Li-ion charger designs benefit from the PIC16CE624T-20I/SO's two on-chip analog comparators and programmable voltage reference, which form a complete delta-V or dT/dt termination detector without external op-amps. The comparators monitor battery voltage and thermistor-resistor divider at 3.0V-5.5V supply while the 20MHz core runs the charge-state machine in a 200ns-cycle RISC loop. The 128-byte EEPROM logs cycle counts and learned battery capacity, useful in professional charger tools. Industrial temperature grade and low CMOS quiescent current extend battery shelf life.
Recommended
Security Keypad and Access Control
Access control panels and PIN-code keypads use the PIC16CE624T-20I/SO's 13 I/O to scan a 4x4 matrix directly and drive LED indicators, a piezo buzzer, and a magnetic-door relay. The on-chip EEPROM (128 bytes) securely stores up to a dozen user PINs and access logs that survive battery-backed power loss. The 35-instruction PIC core is small enough to fit in 1.75KB of OTP yet fast enough at 20MHz to debounce keys in real time and execute DES-lite or hashed-PIN verification routines within microseconds, while the industrial temperature grade suits outdoor keypad enclosures.
Recommended
Industrial Sensor Signal Conditioning
The PIC16CE624T-20I/SO's two on-chip analog comparators and programmable voltage reference make it a cost-effective linearisation and threshold detector for thermocouples, RTDs, photo-diodes, and Hall-effect sensors in industrial 4-20mA loops. The 13 digital I/O drive optocouplers and isolated RS-485 transceivers, while the 200ns instruction cycle handles 10Hz sample-rate smoothing filters. The 128-byte EEPROM stores per-unit calibration constants for accuracy across sensor tolerances. Industrial -40C to +85C operation and 3.0V-5.5V supply work directly from a 24V-bus-derived 5V rail.
Recommended
LED Display and Lighting Controller
Multiplexed 7-segment displays and architectural LED drivers benefit from the PIC16CE624T-20I/SO's 13 I/O driving up to seven segments plus a digit-select transistor array directly, with the 20MHz core refreshing displays above 100Hz to eliminate flicker. The two on-chip comparators detect zero-cross of the AC mains for triac-dimmable LED fixtures, while the 128-byte EEPROM saves brightness presets, color-mix tables, and dim curves per installation. The industrial temperature grade and 3.0V-5.5V operation suit both battery-powered and mains-powered lighting.
Recommended
Educational Microcontroller Trainer Board
Universities and vocational schools use the PIC16CE624T-20I/SO as the heart of introductory 8-bit microcontroller trainer boards because its 35 single-word instructions teach RISC concepts in a single lab session and the OTP memory enforces disciplined development practices. The 18-SOIC package is breadboard-friendly with a SOIC-to-DIP adapter, and the two on-chip comparators plus programmable reference let students explore analog and digital mixed-signal projects. The industrial -40C to +85C temperature grade tolerates lab handling, and 3.0V-5.5V supply runs from a single 5V rail.
Recommended
Simple Sensor Hub and Data Logger
Low-power sensor hubs and stand-alone data loggers use the PIC16CE624T-20I/SO to scan multiple switch/contact inputs, perform threshold detection via the on-chip comparators, and store time-stamped events in the 128-byte EEPROM (with wrap-around). The 20MHz PIC core at 200ns instruction cycle services interrupts quickly enough for door-switch, motion, and tamper-detection loops, while the industrial -40C to +85C grade handles outdoor and unheated enclosures. The 3.0V-5.5V supply is compatible with both 3.3V sensors and legacy 5V peripherals.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624T-20I/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624-20I/SO | PIC16CE624-20E/SO | PIC16CE624T-20/SO | PIC16CE623-20I/SO | PIC16CE624T-04I/SO | PIC16CE624-04I/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (7.50mm) | 18-SOIC (7.50mm) - same | 18-SOIC (7.50mm) - same | 18-SOIC (7.50mm) - same | 18-SOIC (7.50mm) - same | 18-SOIC (7.50mm) - same | 18-SOIC (7.50mm) - same |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 4 MHz |
| Program Memory (OTP) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) | 1.75 KB (1K x 14) |
| EEPROM Size | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 64 bytes | 128 bytes | 128 bytes |
| RAM Size | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +125C (Extended) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| Number of I/O Pins | 13 | 13 | 13 | 13 | 13 | 13 | 13 |
| Analog Comparators | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
Key Differentiators
- Full industrial temperature range vs commercial-grade tape-and-reel variant (vs PIC16CE624T-20/SO)
- Larger on-chip EEPROM than PIC16CE623 (vs PIC16CE623-20I/SO)
- Five-times higher maximum clock rate than 04-speed grade (vs PIC16CE624T-04I/SO)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor as close as possible to the VDD pin (pin 11) and a bulk 10 uF electrolytic on the 5V rail feeding the part. The PIC16CE624 draws CMOS-class supply current (typically a few mA at 20 MHz); add a 100 ohm ferrite-bead + capacitor pi-filter on the supply line if the MCU shares a rail with inductive loads such as relays. Brown-out reset is enabled by configuration fuse to guarantee clean startup across the full 3.0 V to 5.5 V supply range.
OTP (One-Time Programmable) EPROM memory cannot be re-programmed in-circuit: once programmed, the code is permanent. Programming must be performed by a Microchip-supported device programmer (e.g., PICSTART Plus, MPLAB PM3) before PCB assembly. For prototypes or production units that require firmware updates, consider migrating to the flash-based PIC16F88-I/SO (18-SOIC) which has the same pinout but in-system re-programmability via ICSP.
Route the MCLR/VPP pin (pin 1) with a 10k pull-up to VDD and place the ICSP connector (VPP, VDD, VSS, RB6/ICSPCLK, RB7/ICSPDAT) according to Microchip's In-Circuit Serial Programming specification so that firmware can be programmed after PCB assembly. The RB6/RB7 pins double as ICSP clock and data, so avoid tying them to low-impedance loads that could interfere with programming. Place a 0.1 uF cap adjacent to VDD within 5 mm of the pin to suppress switching noise from the oscillator.
The two on-chip analog comparators share input pins with PORTA digital I/O; configure the CMCON register to disable the comparators on unused channels and free those pins as digital I/O. The programmable voltage reference (VR<3:0>) generates a stable internal reference for the comparators but is sensitive to VDD ripple - if the comparators are used for precision threshold detection, add a 10 uF + 0.1 uF decoupling network on VDD and avoid routing high-frequency digital traces near the comparator input pins to minimise crosstalk.
Compliance Information
RoHS / lead-free compliance per DigiKey product listing (Microchip product page). AEC-Q100 not applicable: this is a general-purpose industrial MCU, not automotive-qualified. Halogen-free status not stated on the Microchip product page - left as 'unknown' rather than guessed. Lifecycle status NRND per Microchip's product directory as of 2026-09-19.