PIC16CE624-04I/SO - 8-bit OTP MCU, 4MHz, 1.75KB | Microchip
MPN: PIC16CE624-04I/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.56 | $25.60 |
| 100 | $2.18 | $218.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.62 | $1,620.00 |
PIC16CE624-04I/SO Overview
An LDO is a type of linear voltage regulator that maintains a stable output voltage even when the input voltage approaches the output voltage. By analogy, the PIC16CE624 belongs to the 8-bit microcontroller family (PIC16C series), itself a sub-family within Microchip's broader PICmicro architecture hierarchy: PIC16C -> 8-bit MCU -> microcontroller -> embedded computing -> semiconductor. Understanding this hierarchy clarifies how the CE624 compares to PIC10/PIC12/PIC16/PIC18/PIC24/dsPIC/PIC32 parts in instruction set, memory map, and peripheral complement.
Key differentiating features include 2 on-chip analog comparators with a programmable voltage reference, 128 bytes of non-volatile EEPROM for parameter storage, an internal 4 MHz RC oscillator option, and an instruction set of only 35 single-word instructions, making it one of the easiest PIC microcontrollers to program. The wide 3.0 V to 5.5 V supply range, hardware USART-less design, and 25 mA source/sink per I/O simplify interface to relays, LEDs, and discrete logic.
Technically, the PIC16CE624 uses a Harvard-architecture RISC engine with a 14-bit instruction word, 8-bit data path, and a 33-instruction opcode set, delivering deterministic 200 ns cycle time at 20 MHz and 1 us at 4 MHz. Two comparators with programmable reference enable direct interfacing to analog sensors, eliminating an external op-amp. The 128-byte EEPROM endurance is rated at 1M erase/write cycles minimum, and brown-out reset is configurable for reliable operation on noisy rails.
Typical applications include appliance control boards, automotive body controllers, industrial sensor interfaces, security panels, and low-cost consumer products. Its 2 comparators with programmable VREF make it well suited for threshold detection on battery or thermistor inputs.
When designing with this part, ensure your programmer supports the OTP variant (the 'C' family is one-time programmable; choose PIC16F627A/628A/648A for Flash re-programmability in the same 18-pin footprint).
This page synthesizes cross-referenced Live Octopart distributor pricing, drop-in same-family alternatives from the Microchip PIC16CE62X lineup, and practical engineering guidance on the OTP programming constraint - information not bundled in the manufacturer datasheet.
Drop-in alternatives for PIC16CE624-04I/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 PIC16CE624-04I/SO (same form factor and footprint) β differing in Instruction Cycle Time, Core Architecture, Package, Program Memory Size, RoHS Status.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16CE624-04/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE624T-04I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE624-04I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16F627A-I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE624-04I/SS
β Drop-Inβ In Stock
$1.49 / Unit
View Datasheet βPIC16CE624-04I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C, 8-bit RISC (Harvard) |
| Instruction Set Size | 35 single-word instructions |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM Size | 96 bytes |
| EEPROM Data Memory | 128 bytes |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz (1 us at 4 MHz) |
| Supply Voltage Range | 3.0 V to 5.5 V |
| I/O Pins | 13 |
| On-chip Comparators | 2 |
| Programmable Voltage Reference | Yes |
| Timers | Timer0, Timer1 (16-bit), Watchdog |
| Package | 18-pin SOIC (SO), 0.300" body width |
| Operating Temperature Range (I grade) | -40 C to +85 C |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (Pb-free SOIC package) |
PIC16CE624-04I/SO Pin Configuration
| Pin 1 | RA2/AN2 β Bidirectional I/O port A bit 2 / analog comparator input |
| Pin 2 | RA3/AN3 β Bidirectional I/O port A bit 3 / analog comparator input |
| Pin 3 | RA4/T0CKI β Bidirectional I/O port A bit 4 / Timer0 clock input |
| Pin 4 | RA5/MCLR/VPP β Bidirectional I/O port A bit 5 / Master Clear (reset) / programming voltage |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RB0/INT β Bidirectional I/O port B bit 0 / external interrupt |
| Pin 7 | RB1 β Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 β Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 β Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 β Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 β Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 β Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 β Bidirectional I/O port B bit 7 |
| Pin 14 | VSS β Ground (sometimes labeled VSS for second ground on this family) |
| Pin 15 | OSC1/CLKIN β Oscillator crystal input / external clock input |
| Pin 16 | OSC2/CLKOUT β Oscillator crystal output / clock output |
| Pin 17 | RA0/AN0 β Bidirectional I/O port A bit 0 / analog comparator input |
| Pin 18 | RA1/AN1 β Bidirectional I/O port A bit 1 / analog comparator input |
Typical Applications
PIC16CE624-04I/SO is suitable for 6 applications: Appliance Control Board, Automotive Body Controller, Industrial Sensor Interface, Security and Alarm Panel, Consumer Remote Control, Smart Home Sensor Node.
Appliance Control Board
The PIC16CE624-04I/SO fits appliance control boards because its 3.0-5.5 V supply range matches direct rectifier-rail regulation, its 13 I/O pins drive relays, triacs, and LED indicators without external buffers, and its 2 on-chip comparators with programmable VREF replace discrete op-amp threshold circuits for temperature and water-level sensing. The 128-byte EEPROM stores user-selectable cycle settings, and the 35-instruction RISC core is small enough to be coded by junior firmware engineers. At ~$1.62 per unit at 1k kq volume, the OTP-only restriction is acceptable in non-serviceable white goods.
Recommended
Automotive Body Controller
For automotive body electronics (window lifters, mirror adjusters, interior lighting), the PIC16CE624-04I/SO offers -40 C to +85 C industrial operation, 2 comparators for switch-bounce-free contact sensing, and 128-byte EEPROM for retaining trim positions across battery disconnects. The 4 MHz grade is sufficient for 100 Hz PWM body-control loops. The 'I' suffix confirms industrial temperature grade; AEC-Q100 qualification is not claimed on this OTP variant, so for AEC-Q100 designs choose PIC16F627AT-I/SO or PIC16F628AT-I/SO instead.
Recommended
Industrial Sensor Interface
The PIC16CE624-04I/SO suits industrial sensor interface modules where analog comparators detect threshold crossings on 4-20 mA loops, thermistor bridges, or photointerrupter outputs. The programmable voltage reference sets the comparator trip without external precision resistors, simplifying BOM. The 1 us instruction cycle supports 1 kHz sensor sampling, and the 13 I/O drive RS-485 transceivers or LCD segment drivers directly. Use the OTP-only variant in sealed, non-reprogrammable field installations.
Recommended
Security and Alarm Panel
For security keypad and PIR motion-detector panels, the PIC16CE624-04I/SO's 128-byte EEPROM stores user codes, zone configurations, and event logs that survive power removal. The 2 comparators detect PIR sensor signal envelopes and tamper-switch states without analog front-end ICs. Low-power sleep current (under 1 uA typical) extends backup-battery life in mains-failure scenarios. The OTP restriction is acceptable since panel firmware is rarely updated post-deployment.
Recommended
Consumer Remote Control
The PIC16CE624-04I/SO is a fit for low-cost IR/RF remote controls because its 13 I/O directly drive a 4x4 matrix keypad plus LED indicators without multiplexing ICs, the 35-instruction RISC core fits in 1.75 KB for IR RC5/RC6 or simple RF protocols, and EEPROM stores learned device codes. The industrial temperature grade tolerates garage and outdoor remotes. The OTP restriction is irrelevant since consumer remotes ship as sealed units.
Recommended
Smart Home Sensor Node
For smart-home sensor nodes (door/window contact, leak detector, occupancy sensor), the PIC16CE624-04I/SO's 2 comparators wake the CPU on threshold crossings without continuous ADC sampling. Battery life of 5+ years is achievable on 2x AA cells because the comparators run in sleep mode at <1 uA. The 128-byte EEPROM retains node ID and pairing keys across battery swaps. The 4 MHz grade is sufficient for sub-1 kbps reporting loops via GPIO bit-banging or external transceiver control.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624-04I/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624-04/SO | PIC16CE624T-04I/SO | PIC16CE624-04I/P | PIC16F627A-I/SO | PIC16CE624-04I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-PDIP - same pinout, through-hole | 18-SOIC - same | 20-SSOP - same die, smaller footprint |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB Flash | 1.75 KB OTP |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Max Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz + 4 MHz internal | 4 MHz |
| Comparators | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF | 2 with VREF |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 13 |
| Operating Temp (I grade) | -40 C to +85 C | 0 C to +70 C (commercial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Memory Type | OTP (one-time) | OTP | OTP | OTP | Flash (reprogrammable) | OTP |
Key Differentiators
- Higher EEPROM data memory vs base PIC16C624 (vs PIC16C624 (base part))
- Drop-in Flash option with same 18-SOIC footprint (vs PIC16F627A-I/SO)
- Industrial -40 C to +85 C operating temperature (vs PIC16CE624-04/SO (commercial grade))
Design Notes
PIC16CE624 is OTP (one-time programmable). Verify your HEX file with a socketed PIC16CE624-04I/P prototype or a PIC16F627A-I/SO Flash sibling before committing to OTP production. A single code bug cannot be fixed in-circuit - the chip must be discarded and replaced. For development cycles, always order the Flash PIC16F627A-I/SO first.
Decouple VDD (pin 14) with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk electrolytic on the supply rail. The PIC16CE624 draws <2 mA active at 4 MHz but draws a startup surge when the WDT or oscillator wakes the device. Use a low-ESR ceramic on VDD to handle the inrush without VDD droop that could trigger brown-out reset.
Route the OSC1/OSC2 traces (pins 15/16) as short as possible and keep them away from switching nodes such as relay drivers or PWM outputs. For a 4 MHz crystal, place a 15-33 pF load capacitor on each OSC pin matching the crystal's load specification. The MCLR/VPP pin (pin 4) requires a 10 kohm pull-up to VDD and a 100 nF cap to ground for in-circuit programming stability.
Estimated: At 4 MHz / 5 V the PIC16CE624 dissipates approximately 25 mW (active current 5 mA * 5 V). Junction temperature rise in the 18-SOIC package is negligible (~1 C above ambient given theta_JA of ~85 C/W). Even at 85 C ambient, junction temperature stays well below the 150 C maximum, so no thermal management is required for typical industrial operation.
The PIC16CE624 analog comparators (pins 1, 2, 17, 18) have input bias currents in the nA range but can be disturbed by digital switching on adjacent pins. Place the analog input traces away from digital lines, use a guard ring tied to analog ground, and configure the comparator pins as analog inputs (clear the corresponding TRIS bits) in software to disable the digital input buffer.
Compliance Information
Pb-free 18-SOIC package per Microchip product page. AEC-Q100 automotive qualification is not claimed on the OTP PIC16CE624 variant; for AEC-Q100 designs choose PIC16F627AT-I/SO or PIC16F628AT-I/SO instead. RoHS and REACH compliance per Microchip material disclosure.
