PIC16CE624-04/P - 4MHz 8-Bit CMOS MCU, 1.75KB OTP, 128B EEPROM | Microchip
MPN: PIC16CE624-04/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.1 | $3.10 |
| 10 | $2.78 | $27.80 |
| 100 | $2.45 | $245.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC16CE624-04/P Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/EPROM/Flash), data memory (RAM), and configurable peripherals (timers, ADC, comparators, communication ports). PIC microcontrollers use a RISC (Reduced Instruction Set Computer) Harvard architecture with separate program and data buses, enabling single-cycle instruction execution. The PIC16 family occupies Microchip's mid-range tier, sitting between the baseline PIC10/12/16x and the high-performance PIC18/dsPIC families, and is widely deployed in appliance, industrial, and automotive entry-level applications where deterministic real-time response, low cost, and mature toolchains matter most.
The -04 speed grade specifies a 4 MHz maximum oscillator input; program memory is OTP (One-Time Programmable) EPROM that can be written once and is non-volatile. The 128-byte on-chip EEPROM provides byte-erasable non-volatile storage for user data such as calibration constants, configuration parameters, and usage logs that must survive power cycles. Two analog comparators plus a programmable voltage reference enable direct sensor interfaces (temperature, light, voltage threshold detection) without external analog components.
Typical applications include entry-level automotive body controllers, white-goods and appliance controls, industrial sensor signal conditioning, and consumer device user interfaces. The through-hole PDIP-18 package supports hand prototyping, breadboarding, and legacy through-hole PCB designs. The 3.0V to 5.5V supply range allows operation from both 3.3V regulated rails and 5V battery or USB supplies, making the part flexible across mixed-voltage systems.
When designing with PIC16CE624-04/P, allocate the EPROM programming window in the production flow (OTP requires a high-voltage programmer and cannot be re-written). Use Microchip's MPLAB X IDE with MPASMTM assembler or XC8 C compiler; verify that the watchdog timer is enabled in critical applications to recover from software lockups. The 13 I/O pins can source/sink up to 25 mA per pin, suitable for direct LED drive.
This page synthesizes Microchip datasheet specifications, real distributor pricing as of 2026-09-19, same-package drop-in alternatives from the PIC16Cxxx family, and practical design notes not aggregated elsewhere.
Drop-in alternatives for PIC16CE624-04/P — 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 PIC16CE624-04/P (same form factor and footprint) — differing in Package, Timers, I/O Pins, Mounting Type, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C624-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE623-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE625-04/P
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16C623-04/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F627A-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F628A-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624-04/P Maximum Ratings & Electrical Characteristics
| Product Type | 8-Bit Microcontroller (MCU) |
| Architecture | PIC16 (RISC, Harvard) |
| Instruction Set | 35 single-word instructions |
| Program Memory | 1.75 KB EPROM (OTP) |
| Data EEPROM | 128 bytes |
| RAM | 96 bytes |
| I/O Pins | 13 |
| Speed Grade | -04 (DC to 4 MHz oscillator input) |
| Instruction Cycle | 200 ns at 20 MHz; 1000 ns at 4 MHz |
| Supply Voltage | 3.0 V to 5.5 V |
| Comparators | 2 analog comparators |
| Programmable Voltage Reference | Yes |
| Watchdog Timer | Yes |
| Timers | TMR0, TMR1, TMR2 |
| Package | 18-pin PDIP (DIP-18, plastic through-hole) |
| Operating Temperature | 0C to +70C (commercial) |
| Mounting Type | Through-Hole (THT) |
PIC16CE624-04/P Pin Configuration
| Pin 1 | RA2/AN2/VREF — Bidirectional I/O, analog channel 2, or voltage reference output |
| Pin 2 | RA3/AN3 — Bidirectional I/O or analog channel 3 |
| Pin 3 | RA4/T0CKI — Bidirectional I/O or Timer 0 clock input (open-drain) |
| Pin 4 | MCLR/VPP — Master clear reset input or programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Bidirectional I/O or external interrupt input |
| Pin 7 | RB1 — Bidirectional I/O |
| Pin 8 | RB2 — Bidirectional I/O |
| Pin 9 | RB3 — Bidirectional I/O |
| Pin 10 | RB4 — Bidirectional I/O with interrupt-on-change |
| Pin 11 | RB5 — Bidirectional I/O with interrupt-on-change |
| Pin 12 | RB6 — Bidirectional I/O with interrupt-on-change |
| Pin 13 | RB7 — Bidirectional I/O with interrupt-on-change |
| Pin 14 | VDD — Positive supply (3.0V to 5.5V) |
| Pin 15 | OSC2/CLKOUT — Oscillator crystal output or clock output (4 MHz RC/HS mode) |
| Pin 16 | OSC1/CLKIN — Oscillator crystal input or external clock input |
| Pin 17 | RA0/AN0 — Bidirectional I/O or analog channel 0 |
| Pin 18 | RA1/AN1 — Bidirectional I/O or analog channel 1 |
Typical Applications
PIC16CE624-04/P is suitable for 7 applications: Entry-Level Automotive Body Controller, White-Goods and Appliance Control, Industrial Sensor Signal Conditioning, Consumer Device User Interface, Hobby and Educational Microcontroller Projects, Battery-Powered Smart Sensor Node, Power Supply Supervisory and Sequencing Controller.
Entry-Level Automotive Body Controller
The PIC16CE624-04/P fits entry-level automotive body controllers because its 13 digital I/O pins can drive relays, lamps, and switches directly sourcing up to 25 mA per pin, while the 2 on-chip analog comparators with programmable voltage reference enable direct sensor threshold detection for door-ajar switches or seat-belt buckle states. The 3.0V-5.5V supply range tolerates automotive cranking transients when paired with a TVS-protected 5V regulator. Its OTP EPROM program memory prevents field firmware tampering, which is required for anti-theft immobilizer subsystems, and the 128 bytes of EEPROM store vehicle configuration parameters (VIN-derived settings, dealer options) that must survive battery disconnect.
Recommended
White-Goods and Appliance Control
White-goods appliances (washing machines, dishwashers, refrigerators) benefit from the PIC16CE624-04/P because the 3 timers (TMR0/TMR1/TMR2) generate the PWM signals needed for motor speed control, buzzer drive, and LED indicator multiplexing without external timer ICs. The 35-instruction PIC16 RISC architecture executes deterministic control loops in 200 ns, critical for real-time motor commutation, and the 1.75KB EPROM holds complete washing-cycle firmware including user-interface state machines. The 128 bytes of EEPROM preserve wash-cycle count and error-log data through power cycles, while the 13 I/O lines drive a 7-segment display, button matrix, and triac interface directly.
Recommended
Industrial Sensor Signal Conditioning
Industrial sensor signal-conditioning modules leverage the PIC16CE624-04/P's 2 analog comparators with programmable voltage reference to threshold-detect analog signals (4-20 mA loops, 0-10V transducer outputs, thermocouple break-protection circuits) without external op-amps or ADC chips. The 13 digital I/O pins interface to HMI displays, Modbus RTU transceivers, or discrete relay outputs, while the 128 bytes of EEPROM retain calibration coefficients and sensor linearization tables that compensate for component drift. The 3.0V-5.5V supply and 0C to +70C commercial range suit indoor control panels; the OTP EPROM protects proprietary calibration algorithms from extraction.
Recommended
Consumer Device User Interface
Consumer remote controls, toys, and small appliances use the PIC16CE624-04/P because the 13 I/O pins scan a 4x4 button matrix (8 pins) plus drive an IR LED transmitter, status LED, and serial EEPROM, eliminating external logic. The 4 MHz internal-friendly oscillator configuration enables low-cost RC oscillator designs without a crystal, while the 35-instruction RISC core delivers predictable 1 us interrupt latency for IR protocol timing (NEC, RC5, Sony). The 128 bytes of EEPROM store user preferences (volume, channel, brightness) across battery changes, and the 1.75KB EPROM holds IR protocol libraries and device menu logic. Watchdog timer recovers from battery brown-out glitches.
Recommended
Hobby and Educational Microcontroller Projects
Hobbyists and educators prefer the PIC16CE624-04/P in 18-pin PDIP through-hole package because the DIP form factor fits standard breadboards and IC sockets, supports hand-soldering, and tolerates repeated insertion during student lab exercises. The PIC16 instruction set has only 35 instructions, teachable in one undergraduate lecture, and Microchip's MPLAB X IDE with XC8 C compiler or MPASM assembler is free for hobby use. The 13 I/O pins drive LEDs, drive servos via PWM from TMR2, read push-buttons, and connect to UART peripherals for serial monitor debugging. OTP EPROM teaches the constraint of one-time programming common in low-cost commercial MCUs.
Recommended
Battery-Powered Smart Sensor Node
Battery-powered smart sensor nodes use the PIC16CE624-04/P because its 3.0V-5.5V supply range operates directly from a 3.6V lithium-thionyl chloride primary cell or two AA alkaline batteries, and the PIC16 sleep mode with watchdog timer draw microamp-level quiescent current between sensor readings. The 2 analog comparators wake the MCU when sensor thresholds are exceeded, enabling event-driven sampling that extends battery life to multi-year deployments. The 128 bytes of EEPROM log sample counts and calibration data, while the 13 I/O pins interface to SPI temperature sensors, I2C peripherals, and a low-power RF transmitter for wireless sensor networks.
Recommended
Power Supply Supervisory and Sequencing Controller
The PIC16CE624-04/P serves as a power-supply supervisory controller in multi-rail systems, using the 2 analog comparators to monitor under-voltage and over-voltage conditions on each rail, the programmable voltage reference as the threshold setpoint, and the 13 I/O pins to drive MOSFET gate drivers for power-good sequencing. The 35-instruction RISC core executes sequencing logic in deterministic 1 us cycles, faster than analog supervisor ICs. The 128 bytes of EEPROM store fault-log records and sequencing parameters, while the OTP EPROM prevents malicious modification of sequencing firmware in security-sensitive systems (e.g., server PSUs, telecom equipment).
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624-04/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C624-04/P | PIC16CE623-04/P | PIC16CE625-04/P | PIC16C623-04/P | PIC16F627A-I/P | PIC16F628A-I/P |
|---|---|---|---|---|---|---|---|
| Package | 18-pin PDIP (DIP-18) | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same |
| 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 EPROM | 0.875 KB EPROM (-50%) | 3.5 KB EPROM (+100%) | 0.875 KB EPROM (-50%) | 1.75 KB Flash | 3.5 KB Flash (+100%) |
| EEPROM | 128 bytes | None (C variant) | 128 bytes | 128 bytes | None (C variant) | 128 bytes | 128 bytes |
| RAM | 96 bytes | 96 bytes | 96 bytes | 128 bytes | 96 bytes | 128 bytes | 224 bytes |
| Max Clock Speed | 4 MHz (DC-4 MHz) | 4 MHz (DC-4 MHz) | 4 MHz (DC-4 MHz) | 4 MHz (DC-4 MHz) | 4 MHz (DC-4 MHz) | 20 MHz | 20 MHz |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 16 (4 RA + 8 RB + 4 RC mapped to 13 pins) | 16 (4 RA + 8 RB + 4 RC mapped to 13 pins) |
| Comparators | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Programmability | OTP (One-Time Programmable) EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | Flash (in-circuit re-programmable) | Flash (in-circuit re-programmable) |
| Internal Oscillator | No (external RC/crystal required) | No | No | No | No | Yes, 4 MHz internal | Yes, 4 MHz internal |
| USART | No | No | No | No | No | Yes | Yes |
| Lifecycle | ACTIVE (mature) | ACTIVE | ACTIVE | ACTIVE | ACTIVE | ACTIVE (recommended for new designs) | ACTIVE (recommended for new designs) |
Key Differentiators
- On-chip 128-byte EEPROM data memory (vs PIC16C624-04/P (same family, C variant))
- Optimized 4 MHz speed grade for low-power designs (vs PIC16F627A-I/P (Flash-based modern replacement))
- 1.75KB EPROM specifically matched to mid-range firmware (vs PIC16CE623-04/P (lower-memory variant))
- OTP EPROM for firmware security (vs PIC16F627A-I/P (Flash-based))
Design Notes
PIC16CE624-04/P uses OTP EPROM, not Flash. Once programmed, the firmware cannot be re-written. This means prototype firmware must be debugged in a PIC16F627A-I/P or similar Flash-based emulator before committing to OTP production parts. Use MPLAB X IDE's simulator and an ICD (in-circuit debugger) on a Flash equivalent to validate the firmware, then burn the validated code into CE624 production units with a high-voltage programmer. Do not use CE624 chips for development.
Brown-out reset (BOR) and watchdog timer (WDT) must be configured in the CONFIG register during programming. For battery-powered designs, enable the WDT with a long postscaler (1:128 or 1:256) to recover from firmware lockups while keeping sleep current low. Brown-out voltage should be set below the minimum operating voltage (3.0V) but above the lowest reliable MCU voltage to prevent undefined execution. Use a 100 nF decoupling capacitor on VDD (pin 14) placed within 5 mm of the pin to suppress switching transients.
Place the 18-pin PDIP through-hole footprint on a standard 2.54 mm (0.1 inch) pitch. Pin 1 is identified by a notched or dimpled marker on the package top. For breadboard or socketed use, use a precision IC socket (e.g., 3M 218-3341-00) rated for repeated insertion. Reserve a 4-pin ICSP (In-Circuit Serial Programming) header on the PCB (MCLR/VPP, VDD, VSS, RB6/ICSPCLK, RB7/ICSPDAT) for production programming, even if CE624 is OTP; the ICSP header enables quick firmware swaps during pilot runs using a Flash equivalent adapter.
The PIC16CE624-04/P in 18-pin PDIP package has a typical thermal resistance of approximately 85 C/W junction-to-ambient. At maximum supply (5.5V) and active mode with all peripherals running, supply current is approximately 5 mA, dissipating 27.5 mW - well within thermal limits. Even at industrial temperature extremes (-40C to +85C), the plastic PDIP package easily handles this load. No heatsink or thermal copper pour is required; the through-hole PDIP package provides natural convection cooling via its leads.
Compliance Information
Compliance status not explicitly stated in the verified web data. The 18-pin PDIP plastic package is typically lead-free for modern Microchip parts, but RoHS compliance should be verified against the lot-specific documentation. AEC-Q100 is not applicable to the commercial-temperature 0C to +70C grade; an industrial or automotive grade PIC16CE624 variant would carry -I or -E part number suffixes.
