PIC16CE624-20/SO - 8-bit OTP MCU, 1.75KB EPROM | Microchip
MPN: PIC16CE624-20/SO β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.75 | $275.00 |
| 500 | $2.41 | $1,205.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC16CE624-20/SO Overview
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip integrating a CPU, program memory, working RAM, and peripheral blocks (timers, comparators, I/O) into a single package. The PIC16CE62X family sits in the hierarchy: 8-bit MCU -> PIC16 mid-range -> PIC16CE6xx sub-family -> CMOS OTP with EEPROM. These devices execute single-word RISC instructions with predictable timing, well suited to deterministic control tasks.
Key features include 35 single-word instructions, 133 ns instruction execution at 20 MHz, two on-chip analog comparators with a programmable voltage reference, a watchdog timer with on-chip RC oscillator, a 16-bit timer/counter (TMR1), an 8-bit timer/counter (TMR0), and an internal brown-out reset circuit. The device supports in-circuit serial programming (ICSP) through RB6/RB7, enabling firmware update after PCB assembly.
The architecture follows Microchip's classic Harvard pipeline with separate program and data buses. The 14-bit instruction word allows immediate operands and direct bit manipulation, while the 8-bit data path keeps register usage compact. EEPROM endurance is specified at 1M write/erase cycles minimum and retention above 40 years, providing reliable non-volatile parameter storage.
Typical applications include white goods and appliance control, automotive body electronics (wiper, lighting, mirror modules), industrial sensor conditioning with analog comparator triggers, low-end consumer products, and battery-powered instrumentation where the PIC16C622/CE622 migration path offers upgrade headroom.
Designers should bias the EPROM-programmed variant by reserving a programming connector on the PCB or selecting the flash-based PIC16F627A for prototypes. The OTP windowed part PIC16CE624/JW is recommended only for development verification.
This page synthesizes distributor pricing across DigiKey, Mouser, and Octopart, same-package drop-in alternatives including the flash-based PIC16F627A-I/SO migration, and practical design notes not bundled in the original datasheet.
Drop-in alternatives for PIC16CE624-20/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 PIC16CE624-20/SO (same form factor and footprint) β differing in Instruction Cycle Time, Package, Maximum Clock Frequency, Mounting Type, Program Memory Size.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16CE624-04/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE624-04I/SO
β Drop-Inβ In Stock
$1.62 / Unit
View Datasheet βPIC16CE623-20/SO
β Drop-Inβ In Stock
$0.87 / Unit
View Datasheet βPIC16CE625-20/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16F627A-I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16F628A-I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE624-20/SO Maximum Ratings & Electrical Characteristics
| Program Memory Type | EPROM (OTP) |
| Program Memory Size | 1.75 KB (1K x 14) |
| Data EEPROM | 128 bytes |
| RAM | 96 bytes |
| CPU Architecture | 8-bit PIC RISC |
| Instruction Count | 35 single-word instructions |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns |
| I/O Pins | 13 |
| Analog Comparators | 2 |
| Programmable Voltage Reference | Yes (shared with comparators) |
| Timers | TMR0 (8-bit), TMR1 (16-bit), WDT |
| Internal Brown-Out Reset | Yes |
| In-Circuit Serial Programming | Yes (RB6/RB7) |
| Package | 18-pin SOIC (SO) |
| Operating Voltage Range | 2.5 V to 5.5 V |
| Operating Temperature Range (Industrial) | -40C to +85C |
| Mounting Type | Surface Mount (Gull Wing) |
PIC16CE624-20/SO Pin Configuration
| Pin 1 | RA2/AN2/CVREF β Bidirectional I/O; analog comparator input; CVREF output |
| Pin 2 | RA3/AN3 β Bidirectional I/O; analog comparator input |
| Pin 3 | RA4/T0CKI β Bidirectional I/O; TMR0 clock input |
| Pin 4 | MCLR/VPP β Master clear reset (active low); programming voltage input |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RB0/INT β Bidirectional I/O; external interrupt source |
| 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; interrupt-on-change |
| Pin 11 | RB5 β Bidirectional I/O; interrupt-on-change |
| Pin 12 | RB6/PGC β Bidirectional I/O; ICSP clock |
| Pin 13 | RB7/PGD β Bidirectional I/O; ICSP data |
| Pin 14 | VDD β Positive supply (2.5 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT β Crystal/ resonator output; clock out |
| Pin 16 | OSC1/CLKIN β Crystal/ resonator input; external clock input |
| Pin 17 | RA0/AN0 β Bidirectional I/O; analog comparator input |
| Pin 18 | RA1/AN1 β Bidirectional I/O; analog comparator input |
Typical Applications
PIC16CE624-20/SO is suitable for 6 applications: White Goods and Appliance Control, Automotive Body Electronics Modules, Industrial Sensor Signal Conditioning, Low-End Consumer Remote Controls, Battery-Powered Instrumentation, Educational Microcontroller Trainer Boards.
White Goods and Appliance Control
The PIC16CE624-20/SO is well-suited to white-goods control boards such as washing-machine user interfaces, dishwasher timers, and microwave oven keypads because its 35-instruction PIC16 mid-range core delivers deterministic 200 ns instruction cycles that simplify relay and triac timing. The 1.75 KB EPROM holds state-machine firmware, and the 128-byte EEPROM retains user settings (program cycles, delay presets, language) across power cycles. With 2.5 V to 5.5 V operation the device drops onto 3.3 V or 5 V rails commonly found in appliance power supplies. The two on-chip analog comparators can monitor mains-zero-crossing signals or temperature sensors without an external op-amp, reducing the BOM. Pin-compatibility with PIC16F627A-I/SO allows designers to validate with flash during prototyping and lock the OTP version for cost-down production runs.
Recommended
Automotive Body Electronics Modules
The PIC16CE624-20/SO's industrial-temperature -20I variant and on-chip brown-out reset make it a candidate for low-cost automotive body modules such as seat controllers, mirror adjusters, wiper timers, and lighting drivers that run from a 12 V bus regulated down to 5 V. The two analog comparators can implement current-sense thresholds on bulb-fail detection without an external op-amp, while the programmable voltage reference provides a stable threshold for crank-cold-start scenarios. The PIC16 mid-range core's deterministic timing simplifies LIN-style software UART implementations at low baud rates. Engineers designing new modules should pair the device with the flash-based PIC16F628A-I/SO for development, then migrate back to the OTP CE624 only when unit cost dominates. Watch the WDT to recover from load-dump-induced brown-outs.
Recommended
Industrial Sensor Signal Conditioning
Use the PIC16CE624-20/SO in industrial 4-20 mA loop sensor heads and limit-switch interfaces that demand an analog comparator front-end and small non-volatile parameter storage. The two comparators with the programmable voltage reference let the firmware implement software-driven sigma-delta ADC conversion of thermocouple or thermistor bridges, eliminating a dedicated ADC IC. The 128-byte EEPROM stores calibration coefficients written at final test, while the EPROM holds fixed linearization routines. With 13 I/O pins the MCU can drive indicator LEDs, accept digital switch inputs, and bit-bang an SPI interface to an external EEPROM or display driver. Operating from 2.5 V to 5.5 V lets a single design serve both 3.3 V loop-powered and 5 V supply variants. Pin-compatibility with PIC16F627A-I/SO enables flash-based in-field firmware updates when protocols evolve.
Recommended
Low-End Consumer Remote Controls
The PIC16CE624-20/SO fits cost-sensitive consumer remote controls for fans, lighting dimmers, and HVAC controllers because its 35-instruction RISC core and 96-byte RAM are sufficient to bit-bang IR or RF transmit encodings without an external encoder IC. The 128-byte EEPROM stores pairing codes, while EPROM holds fixed protocol firmware. Brown-out reset and watchdog timer provide robustness against weak battery conditions, and the 2.5 V to 5.5 V supply range supports both 3 V coin-cell and 5 V USB-powered variants. The two analog comparators can monitor battery voltage for low-battery indication without an ADC. Pin-compatibility with PIC16F627A-I/SO enables rapid prototyping with flash, then cost-down to OTP at high volume.
Recommended
Battery-Powered Instrumentation
The PIC16CE624-20/SO suits portable battery-powered instruments such as digital thermometers, handheld multimeters, and environmental loggers where deterministic low-power behavior matters more than raw MIPS. The PIC16 mid-range core supports SLEEP mode with wake-up on pin change or watchdog timeout, drawing microamp-level standby current. The 2.5 V to 5.5 V supply range accepts a fresh alkaline or lithium cell directly, and the 128-byte EEPROM stores user calibration constants and last-measurement history. The two on-chip comparators implement low-battery detection and simple sensor front-ends without an extra op-amp. Compared to the flash-based PIC16F627A-I/SO, the OTP CE624 trades reprogrammability for unit-cost savings at high volume. Pin-compatible migration preserves PCB layout across variants.
Recommended
Educational Microcontroller Trainer Boards
The PIC16CE624-20/SO is widely used in educational trainer boards and hobbyist microcontroller learning kits because the PIC16 mid-range architecture has 35 single-word instructions that students can master in one lab session, and ICSP lets instructors re-flash the OTP variant only when necessary. The 18-pin SOIC footprint is breadboard-compatible through carrier boards, exposing PORTA, PORTB, comparator inputs, and the programmable voltage reference for hands-on labs covering timers, interrupts, and analog comparator triggers. Compared to the flash-based PIC16F627A-I/SO, the CE624 forces students to plan code carefully because OTP cannot be re-flown. Pair the trainer with the JW windowed version for development verification and the standard SOIC variant for production builds.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624-20/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624-04/SO | PIC16CE624-04I/SO | PIC16CE623-20/SO | PIC16CE625-20/SO | PIC16F627A-I/SO | PIC16F628A-I/SO |
|---|---|---|---|---|---|---|---|
| Package | 18-pin SOIC (SO) | 18-pin SOIC (SO) | 18-pin SOIC (SO) | 18-pin SOIC (SO) | 18-pin SOIC (SO) | 18-pin SOIC (SO) | 18-pin SOIC (SO) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.75 KB OTP EPROM | 1.75 KB OTP EPROM | 1.75 KB OTP EPROM | 0.875 KB OTP EPROM | 3.5 KB OTP EPROM | 1.75 KB Flash | 3.5 KB Flash |
| EEPROM Data Memory | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| RAM | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 224 bytes | 224 bytes |
| Maximum Clock | 20 MHz | 4 MHz | 4 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| USART | No | No | No | No | No | Yes | Yes |
| CCP Module | No | No | No | No | No | Yes | Yes |
| Operating Temperature | 0C to +70C (commercial) | 0C to +70C | -40C to +85C | 0C to +70C | 0C to +70C | -40C to +85C | -40C to +85C |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | Active | Active |
Key Differentiators
- Faster speed grade than -04 variant at same package and pinout (vs PIC16CE624-04/SO)
- Larger program memory than the 623 family member (vs PIC16CE623-20/SO)
- Modern flash migration path with on-chip USART and CCP (vs PIC16F627A-I/SO)
- Built-in EEPROM data memory absent from PIC16C62X OTP-only siblings (vs PIC16C622-20/SO)
Design Notes
The PIC16CE624-20/SO is OTP EPROM-based: each unit can be programmed only once. Build a programming test fixture that exercises all I/O before locking the part, and reserve the JW windowed ceramic package variant for development. If your firmware is still evolving, switch to PIC16F627A-I/SO which is flash-based and pin-compatible; the only difference is the configuration word bits for oscillator mode and code protection.
Place a 100 nF decoupling capacitor as close as physically possible to the VDD pin (pin 14) and a bulk 10 uF aluminum or tantalum capacitor on the same supply trace. The PIC16CE624 power-on reset and brown-out reset trip thresholds are voltage-sensitive; noise on VDD can cause spurious resets. For battery-powered designs, add a 100 kohm pull-down on MCLR to keep the device from entering programming mode if VPP floats.
Route the ICSP clock (RB6/PGC) and data (RB7/PGD) lines as a short, direct pair to the programming connector with no series resistors. Microchip ICSP requires the PGC and PGD signals to enter high-impedance; pull-ups on these lines should be at least 10 kohm to avoid loading the programmer. Place the crystal traces on the same side of the PCB as the MCU with short, symmetric routing and a ground guard ring to minimize EMI coupling into the analog comparators.
When using the on-chip analog comparators with the programmable voltage reference, place CVREF output decoupling (10 nF) at the RA2/CVREF pin and route the analog traces away from digital I/O switching lines. The internal bandgap reference is shared between the comparators; noise on VDD modulates the threshold. For 16-bit sigma-delta conversions via comparator polling, average at least 256 samples and reject outliers using the watchdog timer for software-controlled integration time.
Compliance Information
RoHS, REACH, lead-free, and halogen-free flags were not surfaced in the verified web data for this NRND part; consult the Microchip product page or contact the factory for authoritative compliance documentation. AEC-Q100 is not applicable to commercial-temperature-grade PIC16CE624-20/SO; automotive body modules should use the industrial-temperature -20I variant or migrate to PIC16F628A-I/SO which has automotive-grade options.