PIC16CE624T-20E/SS - 8-Bit 20MHz OTP MCU 1.75KB | Microchip
MPN: PIC16CE624T-20E/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.85 | $4.85 |
| 10 | $4.36 | $43.60 |
| 100 | $3.88 | $388.00 |
| 500 | $3.49 | $1,745.00 |
| 1,000 | $3.1 | $3,100.00 |
PIC16CE624T-20E/SS Overview
An 8-bit microcontroller (MCU) is a small, self-contained computing system on a single integrated circuit that combines a CPU, RAM, program memory, and peripherals. Within the broader taxonomy, the PIC16CE624 belongs to the 8-bit MCU -> microcontroller -> embedded processor -> semiconductor hierarchy. OTP (One-Time Programmable) variants are programmed once with a device programmer and cannot be erased, making them well-suited to low-cost, high-volume applications where firmware is stable.
Key features include a 200ns single-cycle instruction execution (with two-cycle branches), only 35 single-word instructions for easy programming, two on-chip analog comparators, a programmable voltage reference, and 128 bytes of EEPROM for non-volatile user data storage. The PIC16C architecture is upwards compatible with PIC16C5X and PIC12CXXX devices, easing migration from legacy designs.
The PIC16CE624 uses a Harvard-architecture RISC core with separate program and data buses, which enables single-cycle instruction execution. Its CMOS static design ensures low power consumption and operation across a wide frequency range. The device includes power-saving SLEEP mode and a watchdog timer for unattended, long-life embedded deployments.
Typical applications include appliance controls, security and access systems, automotive subsystems, remote transmitters, low-end analog signal conditioning, and industrial controls. Designers often choose this part when the firmware is finalized, low unit cost matters, and EEPROM data storage is needed alongside program memory.
When designing with the PIC16CE624T-20E/SS, ensure your programmer supports the 20-pin SSOP package and the PIC16C OTP algorithm. The wide operating voltage range and low power consumption make it tolerant of battery-powered designs, but OTP programming requires careful firmware validation before final mask release.
This page synthesizes distributor pricing, drop-in cross-brand alternatives, and engineering notes that complement the manufacturer datasheet, giving procurement teams and embedded designers a faster path to component selection and lifecycle planning.
Drop-in alternatives for PIC16CE624T-20E/SS — 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-20E/SS (same form factor and footprint) — differing in Core Architecture, Package, Program Memory Size, Instruction Cycle Time, EEPROM Data Memory.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE623T-20E/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE624T-04E/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE624-04/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE624-20E/SO
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC16F690T-I/SS
✅ Drop-In✓ In Stock
$0.98 / Unit
View Datasheet →PIC16CE624T-20E/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C (8-bit) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14 words) |
| RAM Size | 96 B |
| EEPROM Data Memory | 128 B |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle | 200 ns |
| Instruction Set Size | 35 single-word instructions |
| I/O Pins | 13 |
| On-chip Comparators | 2 |
| Programmable Voltage Reference | Yes |
| Watchdog Timer | Yes |
| Package | 20-SSOP |
| Mounting Type | Surface Mount |
| Operating Temperature | -40C to +125C (E suffix = extended) |
| ADC | None |
PIC16CE624T-20E/SS Pin Configuration
| Pin 1 | RA2 — Port A bit 2 (I/O) |
| Pin 2 | RA3 — Port A bit 3 (I/O) |
| Pin 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR/VPP — Master Clear reset / Programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Port B bit 0 / External interrupt |
| Pin 7 | RB1 — Port B bit 1 (I/O) |
| Pin 8 | RB2 — Port B bit 2 (I/O) |
| Pin 9 | RB3 — Port B bit 3 (I/O) |
| Pin 10 | RB4 — Port B bit 4 (I/O) |
| Pin 11 | RB5 — Port B bit 5 (I/O) |
| Pin 12 | RB6 — Port B bit 6 (I/O) |
| Pin 13 | RB7 — Port B bit 7 (I/O) |
| Pin 14 | VDD — Positive supply voltage |
| Pin 15 | OSC2/CLKOUT — Oscillator output / Clock out |
| Pin 16 | OSC1/CLKIN — Oscillator input / External clock in |
| Pin 17 | RA0/AN0 — Port A bit 0 / Comparator CH1 input |
| Pin 18 | RA1/AN1 — Port A bit 1 / Comparator CH2 input |
| Pin 19 | CVREF — Comparator voltage reference output |
| Pin 20 | RA5 — Port A bit 5 (I/O) |
Typical Applications
PIC16CE624T-20E/SS is suitable for 6 applications: Appliance Control Panels, Security and Access Control Systems, Automotive Body Electronics Subsystems, Remote Control RF Transmitters, Industrial Sensor Signal Conditioning, Smart Metering and Energy Monitoring.
Appliance Control Panels
The PIC16CE624T-20E/SS fits appliance control boards because its 20MHz core, 1.75KB OTP program memory, and 128-byte on-chip EEPROM are sufficient to host user-interface state machines and parameter storage for washers, ovens, and microwave controllers. The 35-instruction PIC16C RISC set keeps firmware small and deterministic. With 13 I/O pins, it can directly drive 7-segment displays, keypad scans, and relay/triac controls. The two on-chip comparators enable zero-crossing detection for triac dimming, replacing a dedicated analog front-end IC. OTP programming suits high-volume appliances where firmware is locked and BOM cost matters more than in-field updates. Place a 100nF decoupling cap adjacent to Vdd and use the on-chip watchdog for unattended reliability.
Recommended
Security and Access Control Systems
The PIC16CE624T-20E/SS is well suited to security panels and access controllers because the 128-byte EEPROM reliably stores access codes, event logs, and tamper counters across power cycles without external memory ICs. Its 20MHz clock provides fast response on keypad debouncing and code comparison, while the 96-byte RAM holds transient buffers. The two analog comparators handle tamper-loop impedance sensing without extra components. OTP storage prevents firmware extraction, an advantage in security applications. The -40C to +125C extended temperature range supports outdoor enclosures. Engineer the supply with battery backup so the watchdog and EEPROM retention remain active during mains loss.
Recommended
Automotive Body Electronics Subsystems
In automotive body modules (mirror controllers, seat adjusters, lighting drivers), the PIC16CE624T-20E/SS offers the right balance of cost, peripherals, and ruggedness. The 20MHz core drives PWM for motor speed control, the 13 I/Os handle H-bridge direction logic, and the extended -40C to +125C temperature range tolerates underhood and cabin extremes. The two comparators enable current-limit detection on FETS without external amps. OTP memory locks firmware to prevent unauthorized reflashing. Engineers often place this MCU in non-safety body subsystems where AEC-Q100 isn't strictly required; for safety-critical paths migrate to a Q100-qualified MCU. Add reverse-battery and load-dump protection on the supply rail.
Recommended
Remote Control RF Transmitters
The PIC16CE624T-20E/SS powers remote-control RF transmitters (garage-door openers, key fobs, industrial remotes) thanks to its low power consumption, fast wake from SLEEP, and ability to drive an external SAW- or crystal-based transmitter at precise timing. The 200ns instruction cycle generates accurate bit-banged or timer-driven encodings for OOK/FSK modulation. EEPROM stores rolling codes and pairing IDs. Two comparators can monitor battery voltage and detect low-battery conditions. OTP prevents cloning of the firmware. With 1.75KB of code space, a complete encoder protocol stack fits comfortably. Use the watchdog to recover from ESD-induced lockups.
Recommended
Industrial Sensor Signal Conditioning
In industrial process-control front-ends, the PIC16CE624T-20E/SS acts as a low-cost analog interface and supervisory MCU. The two on-chip comparators handle threshold detection on thermocouples, photodiodes, or strain-gauge bridges, while the programmable voltage reference sets a precise threshold window. The 200ns instruction cycle supports high-speed sampling loops, and the EEPROM stores calibration data per channel. OTP memory locks the calibration routine so it cannot drift between units. The 13 I/Os are sufficient to drive status LEDs and a UART to a host controller. Use optocouplers on I/Os for galvanic isolation in factory environments.
Recommended
Smart Metering and Energy Monitoring
The PIC16CE624T-20E/SS fits smart metering end-points (water/gas/electricity sub-meters) where cost is critical and firmware is locked at production. Its EEPROM stores tariff tables and tamper logs, while the 20MHz core performs pulse counting and power-quality calculations. Two comparators detect zero-crossing for line-frequency synchronization and detect theft/tamper events. SLEEP mode plus watchdog yields multi-year battery life on wireless meter nodes. OTP prevents reverse-engineering of the metrology firmware. Add a 32.768kHz crystal for timekeeping and an external EEPROM if log retention exceeds 128 bytes.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624T-20E/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE623T-20E/SS | PIC16CE624T-04E/SS | PIC16CE624-04/SS | PIC16CE624-20E/SO | PIC16F690T-I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SOIC | 20-SSOP - same |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 7.2 KB Flash |
| Data EEPROM | 128 B | 0 B | 128 B | 128 B | 128 B | 256 B |
| Max Clock Frequency | 20 MHz | 20 MHz | 4 MHz | 4 MHz | 20 MHz | 20 MHz |
| RAM | 96 B | 96 B | 96 B | 96 B | 96 B | 256 B |
| Memory Type | OTP | OTP | OTP | OTP | OTP | Flash |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 18 |
| Lifecycle | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Active |
Key Differentiators
- 128 bytes on-chip EEPROM (vs PIC16CE623T-20E/SS)
- Maximum 20MHz clock speed grade (vs PIC16CE624T-04E/SS)
- Same die in narrower 20-SSOP package (vs PIC16CE624-20E/SO)
- Drop-in to Flash-based active MCU (vs PIC16F690T-I/SS)
Design Notes
OTP memory is one-time programmable: firmware bugs locked into production units cannot be fixed in the field. Mitigation: build a pre-production verification harness that exercises 100% of code paths and parameter ranges, and stockpile engineering samples for last-minute design tweaks. Also confirm your device programmer supports the PIC16CE624 algorithm (legacy 16C series), as newer programmers may default to PIC16F algorithms that will fail to program.
Place a 100nF ceramic decoupling capacitor within 5mm of the VDD pin (pin 14) and a bulk capacitor (10uF or larger) on the supply rail. The PIC16CE624T-20E/SS draws higher peak currents during EEPROM write cycles; without local bulk capacitance, VDD can sag and cause EEPROM corruption or unexpected resets. Also keep the MCLR/VPP pin (pin 4) tied to VDD through a 10kohm resistor for normal operation.
For 20-SSOP (0.65mm pitch), use ENIG finish on the PCB pads and a fine-pitch stencil (0.1mm thickness) for reflow soldering. Avoid hand soldering on production volume - use selective soldering or reflow exclusively. Keep the OSC1/OSC2 traces short (under 10mm) and route them away from switching nodes or RF traces to minimize EMI coupling into the clock. Use a guard ring around the oscillator pins if the design operates near noisy digital signals.
The PIC16CE624T-20E/SS has 13 usable I/Os (RA0-RA5, RB0-RB7 minus the MCLR/VPP, VDD, VSS, OSC1, OSC2 allocations). For comparator inputs (RA0/RA1) keep traces short and shielded to avoid picking up switching noise. Place the CVREF output (pin 19) close to the comparator inputs it feeds, and bypass it with 100nF if it drives an external reference network.
Estimated: at maximum clock (20MHz) and 5V supply, the PIC16CE624T-20E/SS typically draws ~10mA active and ~1uA SLEEP. With theta_JA of approximately 90 C/W for the 20-SSOP package, the junction temperature rise is well below 5C even at extended ambient, so no thermal relief is required for normal operation. Always check the actual self-heating in your sealed enclosure via thermocouple measurement during worst-case firmware loops.
Compliance Information
Compliance values not provided in Verified Web Data. Microchip typically ships legacy 16C OTP parts with Pb-free/RoHS-compliant finishes, but this cannot be verified from the supplied data and is marked as [DATA_NEEDED].
