PIC16CE624T-04/SO - 4MHz 8-Bit OTP MCU w/EEPROM | Microchip
MPN: PIC16CE624T-04/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.62 | $3.62 |
| 10 | $3.21 | $32.10 |
| 100 | $2.78 | $278.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.1 | $2,100.00 |
PIC16CE624T-04/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, EEPROM, and programmable I/O peripherals. OTP microcontrollers use one-time-programmable memory that is programmed after manufacture and cannot be erased, making them low-cost and well-suited for high-volume production where firmware is stable. The PIC16CE62X series sits in Microchip's mid-tier 8-bit PIC family, upwards compatible with the PIC16C5X and PIC12CXXX devices, and is designed for entry-level applications in automotive, industrial, appliance, and consumer markets.
Key features of the PIC16CE624 include two analog comparators with programmable reference, a Brown-Out Detect (BOD) circuit, Power-On Reset (POR), Watchdog Timer (WDT) with its own on-chip RC oscillator, and 13 general-purpose digital I/O pins. The integrated 128-byte EEPROM supports non-volatile data storage, removing the need for an external serial EEPROM in simple data-logging designs. The 4 MHz internal/external clock and 1K-word OTP program memory support small to mid-sized embedded control loops.
The PIC16CE624 uses a Harvard-architecture RISC core with separate code and data buses, an 8-level deep hardware stack, and five I/O ports grouped into PORTA (5 pins) and PORTB (8 pins). The on-chip EEPROM supports >1 million erase/write cycles and 40-year retention per the Microchip datasheet, which is appropriate for parameter storage, serial-number retention, and user-setting memory in appliance and consumer products.
Typical applications include white-goods and appliance control (washing-machine user-interface boards, microwave ovens), industrial sensor transmitters, low-end automotive body modules, security keypads, and small consumer devices. The combination of analog comparators, EEPROM, and small OTP code memory fits designs that previously required a multi-chip analog + EEPROM + MCU solution.
When designing with the PIC16CE624T-04/SO, ensure the supply rail is decoupled with at least 0.1 µF ceramic placed within 5 mm of VDD, and confirm that the MCLR pin pull-up and reset-capacitor network match the PIC16C62X family reference design in the datasheet. Note that this part is OTP, not Flash, so firmware must be fully validated on the PIC16CE624-04/SO (windowed or EPROM equivalent) before high-volume programming.
This page synthesizes distributor pricing, drop-in same-package alternatives within the PIC16CE62X and PIC16C62X families, and practical design notes that are not consolidated in any single manufacturer document.
Drop-in alternatives for PIC16CE624T-04/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-04/SO (same form factor and footprint) — differing in Operating Temperature, Package, Program Memory Size, Core, Data EEPROM.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE623T-04/SO
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC16CE625T-04/SO
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16CE624T-04E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624T-04I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C624T-04/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE623T-04E/SO
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE624T-04/SO Maximum Ratings & Electrical Characteristics
| Core | PIC 16C, 8-bit RISC |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 1 µs @ 4 MHz |
| Program Memory | 1.75 KB (1K x 14) OTP |
| Data EEPROM | 128 bytes |
| RAM | 128 bytes |
| General-Purpose I/O Pins | 13 |
| Comparators | 2 (with programmable voltage reference) |
| Timers | 1 x 8-bit, 1 x 16-bit (TMR1) |
| Watchdog Timer | Yes, with dedicated on-chip RC oscillator |
| Brown-Out Detect (BOD) | Yes |
| Power-On Reset (POR) | Yes |
| Instruction Set | 35 single-word instructions |
| Package | 18-SOIC (7.50 mm / 0.295" width) |
| Mounting Type | Surface Mount |
| Operating Temperature | 0 °C to +70 °C (commercial grade) |
| Supply Voltage | 3.0 V to 5.5 V |
| ICSP / In-Circuit Programming | No (OTP device - programmed after manufacture) |
| MSL Level | 1 |
PIC16CE624T-04/SO Pin Configuration
| Pin 1 | RA2/AN2/VREF — PORTA bit 2 / analog input 2 / voltage reference output |
| Pin 2 | RA3/AN3/CMP1 — PORTA bit 3 / analog input 3 / comparator 1 output |
| Pin 3 | RA4/T0CKI/CMP2 — PORTA bit 4 / Timer0 clock input / comparator 2 output |
| Pin 4 | MCLR/VPP — Master clear reset (active low) / programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — PORTB bit 0 / external interrupt input |
| Pin 7 | RB1 — PORTB bit 1 |
| Pin 8 | RB2 — PORTB bit 2 |
| Pin 9 | RB3/PGM — PORTB bit 3 / low-voltage programming input |
| Pin 10 | RB4 — PORTB bit 4 |
| Pin 11 | RB5 — PORTB bit 5 |
| Pin 12 | RB6/PGC — PORTB bit 6 / ICSP clock |
| Pin 13 | RB7/PGD — PORTB bit 7 / ICSP data |
| Pin 14 | VDD — Positive supply voltage (+3.0 V to +5.5 V) |
| Pin 15 | OSC2/CLKOUT — Crystal/oscillator output / Fosc/4 clock output |
| Pin 16 | OSC1/CLKIN — Crystal/oscillator input / external clock input |
| Pin 17 | RA0/AN0 — PORTA bit 0 / analog input 0 |
| Pin 18 | RA1/AN1 — PORTA bit 1 / analog input 1 |
Typical Applications
PIC16CE624T-04/SO is suitable for 6 applications: White Goods and Appliance Control, Industrial Sensor Transmitters and Process Meters, Low-End Automotive Body and Convenience Modules, Security Keypads and Access-Control Panels, Consumer Electronics Remote Controls and Toys, Smart Home Sensor Nodes and IoT Edge Devices.
White Goods and Appliance Control
The PIC16CE624T-04/SO is well-suited for white-goods appliance control boards (washing-machine user interfaces, microwave-oven keypads, dishwasher controllers) because its 4 MHz RISC core, 1Kx14 OTP program memory, and 128-byte on-chip EEPROM are sufficient for the small firmware image plus user-setting retention needed in these designs. The 128-byte EEPROM stores wash-cycle selection, calibration values, and serial numbers across power cycles without an external serial EEPROM. The two on-chip comparators with programmable voltage reference can directly sense water-level, temperature-switch, or door-latch signals, eliminating analog front-end components. Operating from a single 5 V rail and tolerating the 0-70 °C commercial range, it fits inside sealed appliance enclosures with no heatsinking.
Recommended
Industrial Sensor Transmitters and Process Meters
For 4-20 mA loop-powered or low-power industrial sensor transmitters, the PIC16CE624T-04/SO provides an integrated 8-bit ADC-free architecture that pairs two comparators with a programmable voltage reference to digitize sensor signals through slope/ramp conversion. The 128-byte EEPROM retains calibration coefficients, sensor ID, and engineering-unit conversion tables across decades of operation - critical for field-deployed transmitters that cannot be re-calibrated frequently. The 4 MHz CPU clock runs the comparator ramp algorithm and linearization math while keeping active current draw low, extending battery life in wireless or loop-powered designs. Industrial-grade variants (PIC16CE624T-04I/SO) extend the operating range to -40 °C to +85 °C for outdoor installations.
Recommended
Low-End Automotive Body and Convenience Modules
The PIC16CE624T-04/SO is well suited to automotive body-electronics modules such as door-lock controllers, seat-position memories, sunroof controllers, and mirror-adjust modules where modest code size, EEPROM parameter storage, and on-board analog comparators are valued. The two comparators and programmable voltage reference let the MCU monitor switch inputs and analog sensors without external analog circuitry, while the 128-byte EEPROM stores user preferences (seat position, mirror angle) across battery disconnects. The Brown-Out Detect circuit holds the MCU in reset during crank-voltage sag, preventing code runaway when the vehicle battery drops below threshold. For under-hood or harsh-environment modules, the extended-grade PIC16CE624T-04E/SO is recommended.
Recommended
Security Keypads and Access-Control Panels
The PIC16CE624T-04/SO fits security keypads, RFID readers, and small access-control panels where code volume is small (under 1 K words), EEPROM is needed for storing user PINs and entry logs, and where low cost plus reliability are essential. The 8-bit core runs scan-and-debounce loops on the keypad matrix efficiently, and the 128-byte EEPROM retains credentials and audit logs across power outages and tamper events. Watchdog Timer with its own RC oscillator prevents code-lockup from EMI or static discharge that may occur near door strike hardware. The two analog comparators can directly interface with tamper-switch and door-position sensors without external analog ICs.
Recommended
Consumer Electronics Remote Controls and Toys
The PIC16CE624T-04/SO is widely used in cost-sensitive consumer products such as universal remote controls, educational toys, small kitchen appliances, and hobby electronics. The 4 MHz core handles key-scanning, IR transmit/receive timing, and small audio-tone synthesis while keeping the active current well under 10 mA, enabling battery-powered designs that last months on alkaline cells. The 128-byte EEPROM stores user-customized settings (TV brand code, volume preset, last channel) that survive battery replacement. Surface-mount 18-SOIC packaging supports automated assembly at very low cost, fitting the price-point requirements of high-volume consumer goods.
Recommended
Smart Home Sensor Nodes and IoT Edge Devices
The PIC16CE624T-04/SO can serve as a low-cost edge controller in smart-home sensor nodes (temperature, occupancy, leak detectors, simple thermostat interfaces) where it aggregates analog and digital sensor data, runs a small control algorithm, and forwards events to a host processor via UART or simple protocol. The two on-chip comparators can directly detect threshold-crossing sensor events (PIR motion detectors, leak probes, light-level thresholds) without external analog components. The 128-byte EEPROM stores configuration and last-known-state across Wi-Fi/co-processor power-cycles, and the BOD/POR functions survive brownouts caused by switching power-supply glitches. Modern designs would consider PIC16F1827-I/SO for active production, but the PIC16CE624 remains in legacy installed bases.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624T-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE623T-04/SO | PIC16CE625T-04/SO | PIC16CE624T-04E/SO | PIC16CE624T-04I/SO | PIC16CE624-04/SO | PIC16C624T-04/SO | PIC16CE623T-04E/SO |
|---|---|---|---|---|---|---|---|---|
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1K x 14 OTP (1.75 KB) | 1K x 14 OTP (1.75 KB) - same | 2K x 14 OTP (3.5 KB) - +100% | 1K x 14 OTP - same | 1K x 14 OTP - same | 1K x 14 OTP - same | 1K x 14 OTP - same | 1K x 14 OTP - same |
| Data EEPROM | 128 bytes | 128 bytes - same | 128 bytes - same | 128 bytes - same | 128 bytes - same | 128 bytes - same | None (-100%) | 128 bytes - same |
| Maximum Clock | 4 MHz | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same | 4 MHz - same |
| Comparators | 2 | 1 (-50%) | 2 - same | 2 - same | 2 - same | 2 - same | 2 - same | 1 (-50%) |
| Operating Temperature | 0 °C to +70 °C (commercial) | 0 °C to +70 °C - same | 0 °C to +70 °C - same | -40 °C to +125 °C (extended) | -40 °C to +85 °C (industrial) | 0 °C to +70 °C - same | 0 °C to +70 °C - same | -40 °C to +125 °C (extended) |
| Programming Type | OTP | OTP - same | OTP - same | OTP - same | OTP - same | OTP - same | OTP - same | OTP - same |
| Packaging Format | Tape & Reel (T suffix) | Tape & Reel - same | Tape & Reel - same | Tape & Reel - same | Tape & Reel - same | Tube - different | Tape & Reel - same | Tape & Reel - same |
Key Differentiators
- On-chip 128-byte data EEPROM at 1K x 14 OTP cost (vs PIC16C624T-04/SO)
- Two analog comparators with programmable reference on-chip (vs PIC16CE623T-04/SO)
- Larger 1K x 14 OTP at the same package and price tier (vs PIC16CE623T-04/SO)
- Commercial temperature range optimized for cost-sensitive consumer and appliance products (vs PIC16CE624T-04I/SO)
Design Notes
Decouple VDD (pin 14) with at least 0.1 µF ceramic placed within 5 mm of the IC, plus a bulk 1-10 µF tantalum or aluminum on the supply rail. The PIC16CE624 has very fast edge transitions on I/O pins; insufficient decoupling can cause code runaway that the Watchdog Timer must catch. Add a 10-100 Ω ferrite bead or small inductor on the VDD trace when the supply is shared with motors or relays. Brown-Out Detect should be enabled (BODEN configuration bit) to hold the MCU in reset when VDD falls below ~4.0 V, preventing erratic code execution during crank or load-dump events.
Route the crystal (or resonator) traces between OSC1 (pin 16) and OSC2 (pin 15) as short as possible and keep them away from switching traces or high-current signals. Place the crystal case ground pin directly to a ground island tied to VSS (pin 5) with a single short trace to avoid ground loops. MCLR/VPP (pin 4) requires a 10-100 kΩ pull-up to VDD for normal operation and a 0.01-0.1 µF capacitor to ground for noise filtering; the resistor-capacitor time-constant is application-dependent. Keep RB6/PGC and RB7/PGD away from analog comparator input pins RA0-RA3 to prevent programming noise from coupling into sensitive analog measurements.
Do not assume the PIC16CE624T-04/SO can be re-programmed in-circuit - it is OTP, so firmware bugs discovered after programming cannot be corrected without scrapping the part. Always validate firmware on the PIC16CE624-04/JW (windowed/EPROM) emulator or on a Flash-based equivalent (PIC16F627A-I/SO) before committing to volume programming. Do not leave unused I/O pins floating - configure them as outputs or tie them to VDD/VSS through a resistor, since floating inputs can cause shoot-through currents and unpredictable code paths. Do not exceed 25 mA total into any I/O port (PORTA or PORTB) or 200 mA total VDD current per the absolute-maximum ratings.
When using the on-chip comparators with the programmable voltage reference, place the VREF load (pin 1) trace away from digital switching signals; the reference is shared with the comparator threshold and ripple on it directly couples into comparator output noise. For sensor interfaces that switch below 1 mV, add a small RC low-pass filter (1-10 kΩ, 0.01 µF) at the comparator input pin to filter EMI. The 128-byte EEPROM is sensitive to VDD brownouts during write cycles - the BOD should be enabled and the write completion should be verified by reading back the saved value before proceeding with subsequent operations.
Compliance Information
Compliance information not present in verified web data - status must be verified with the manufacturer or distributor before use in regulated designs.
