PIC16CE624T-20/SO - 8-Bit 20MHz OTP MCU 1.75KB | Microchip
MPN: PIC16CE624T-20/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $5.2 | $5.20 |
| 10 | $4.68 | $46.80 |
| 100 | $4.16 | $416.00 |
| 500 | $3.74 | $1,870.00 |
| 1,000 | $3.32 | $3,320.00 |
PIC16CE624T-20/SO Overview
An OTP 8-bit CMOS MCU (microcontroller) is a single-chip computer that integrates a CPU, non-volatile program memory (one-time-programmable EPROM or flash), working RAM, and peripherals on one silicon die. It belongs to the broader hierarchy of microcontroller -> embedded processor -> semiconductor -> integrated circuit. The "16C" family designation indicates a Mid-Range PIC architecture using a 14-bit instruction word with only 35 single-word instructions, making the PIC16CE624T-20/SO approachable for new firmware developers while remaining upwards compatible with the PIC16C5X and PIC12CXXX device families.
Key specifications include a 20 MHz maximum oscillator frequency, 200 ns instruction cycle, 1.75 KB (1K x 14) OTP program memory, 128 bytes of EEPROM data memory, 96 bytes of general-purpose RAM, two on-chip analog comparators with programmable voltage reference, a watchdog timer with its own on-chip RC oscillator, brown-out detect/reset, and power-on reset. The T-suffix denotes tape-and-reel packaging while the SO suffix indicates the 18-SOIC package; the -20 speed grade specifies the 20 MHz maximum clock.
The PIC16CE624T-20/SO uses a Harvard architecture with separate program and data buses plus a RISC-style instruction set. Internal RC oscillator options reduce external component count. Brown-out detection, power-on reset, and watchdog timer provide three layers of system reliability, critical for unattended industrial controllers. The 128-byte EEPROM is byte-erasable, supporting field-updatable configuration without UV erasure as required by windowed EPROM parts.
Typical applications include industrial control front-ends, low-cost consumer appliances, automotive body electronics, sensor signal conditioning, and battery-powered measurement instruments that benefit from the integrated analog comparators. The 0C to 70C commercial temperature range and 2.0V to 6.0V operating voltage allow use across standard 3.3V and 5V logic rails. The two comparators with programmable voltage reference are particularly useful for threshold detection on analog sensors before digitisation.
When designing with this part, note that OTP memory cannot be re-programmed in-circuit, so firmware must be fully validated before commitment. For in-system reprogrammability, consider the Flash-based PIC16F family. The 13 available I/O pins limit complex peripheral expansion, making this part best suited for focused single-function controllers rather than hub-style multi-bus designs.
This page synthesizes real-time distributor pricing, drop-in pin-compatible alternatives, and practical design notes not consolidated in the manufacturer datasheet, providing an integrated engineering reference for procurement and design decisions.
Drop-in alternatives for PIC16CE624T-20/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-20/SO (same form factor and footprint) — differing in Instruction Cycle Time, Package, Program Memory Size, Program Memory Type, Core Architecture.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE624T-20E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624-20I/SO
✅ Drop-In✓ In Stock
$2.84 / Unit
View Datasheet →PIC16CE624-20E/SO
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC16CE624-20/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624-30/SO
✅ Drop-In✓ In Stock
$2.61 / Unit
View Datasheet →PIC16CE623-20/SO
✅ Drop-In✓ In Stock
$0.87 / Unit
View Datasheet →PIC16CE624T-20/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit (Mid-Range, 14-bit instruction word) |
| Family | PIC16CE62X |
| Program Memory Type | OTP (One-Time-Programmable EPROM) |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM Size | 96 bytes |
| EEPROM Data Memory | 128 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns (single-cycle, except branches 400 ns) |
| Operating Voltage (Vdd) | 2.0 V to 6.0 V |
| I/O Pins | 13 |
| Analog Comparators | 2 with programmable voltage reference |
| Watchdog Timer | Yes (with dedicated on-chip RC oscillator) |
| Brown-out Detect / Reset | Yes |
| Power-on Reset | Yes |
| Oscillator Options | External RC, external crystal, internal RC |
| Package | 18-SOIC (7.50 mm body width) |
| Operating Temperature | 0 C to +70 C (commercial) |
| Instruction Set Size | 35 single-word instructions |
| Mounting Type | Surface Mount |
| Lead-Free / RoHS | Refer to manufacturer datasheet |
PIC16CE624T-20/SO Pin Configuration
| Pin 1 | RA2 — PORTA bit 2 / analog comparator input |
| Pin 2 | RA3 — PORTA bit 3 / MCLR input (reset, active low) |
| Pin 3 | RA4 — PORTA bit 4 / T0CKI clock input |
| Pin 4 | RA5 — PORTA bit 5 / analog comparator input |
| Pin 5 | Vss — Ground reference |
| Pin 6 | RB0 — PORTB bit 0 / INT external interrupt |
| Pin 7 | RB1 — PORTB bit 1 |
| Pin 8 | RB2 — PORTB bit 2 |
| Pin 9 | RB3 — PORTB bit 3 |
| Pin 10 | RB4 — PORTB bit 4 |
| Pin 11 | RB5 — PORTB bit 5 |
| Pin 12 | RB6 — PORTB bit 6 / serial programming clock |
| Pin 13 | RB7 — PORTB bit 7 / serial programming data |
| Pin 14 | Vdd — Positive supply (+2.0 V to +6.0 V) |
| Pin 15 | OSC2 — Oscillator output / RA6 general I/O |
| Pin 16 | OSC1 — Oscillator input / RA7 general I/O |
| Pin 17 | RC0 — PORTC bit 0 / analog comparator output |
| Pin 18 | RC1 — PORTC bit 1 / analog comparator output |
Typical Applications
PIC16CE624T-20/SO is suitable for 6 applications: Industrial Sensor Interface Controller, Consumer Appliance Control Board, Automotive Body Electronics Module, Battery-Powered Measurement Instrument, Educational and Hobby Embedded Platform, Smart Sensor Node with Analog Front-End.
Industrial Sensor Interface Controller
The PIC16CE624T-20/SO suits industrial sensor front-ends because its two integrated analog comparators with programmable voltage reference provide hardware threshold detection without an external op-amp, reducing BOM count. With 128 bytes of EEPROM, calibration coefficients and node IDs persist across power cycles without external storage. The 0C to 70C commercial range suits factory-floor enclosures, and the 20 MHz clock (200 ns instruction cycle) handles 10 Hz to 1 kHz sensor sampling loops with margin. Brown-out detect and watchdog timer with dedicated RC oscillator keep the controller recoverable from brown-outs and firmware lock-ups. Typical placement: directly wired to a resistive bridge sensor with comparator output feeding an interrupt pin, while firmware reads the comparator state and drives a relay or 4-20 mA loop.
Recommended
Consumer Appliance Control Board
The PIC16CE624T-20/SO is a natural fit for low-cost consumer appliance controllers such as coffee makers, small kitchen devices, and battery chargers. Its OTP architecture locks firmware against reverse engineering while reducing unit cost versus Flash parts, and the 13 I/O pins drive LEDs, buttons, and relay coils directly. With 1.75 KB of program memory and 35 single-word instructions, firmware development is fast even for junior embedded engineers. Power-on reset and brown-out reset guarantee defined startup in noisy switch-mode power environments. Typical placement: 18-SOIC on a single-layer PCB with mains-side opto-isolated feedback and a triac or relay output, programmed once at end-of-line and never updated.
Recommended
Automotive Body Electronics Module
In automotive body modules such as seat controllers, mirror adjusters, or interior lighting nodes, the PIC16CE624T-20/SO is suitable when paired with the -20E (extended) temperature grade variant. Its two comparators with programmable voltage reference detect LIN bus dominant/recessive levels or analogue switch positions without extra components. The 20 MHz instruction cycle supports LIN 2.0 software UART at 19.2 kbps with margin, and the 128-byte EEPROM stores fault codes and trim values across battery disconnects. Watchdog timer with on-chip RC oscillator recovers the controller from automotive transient-induced firmware stalls. Typical placement: in-cabin module driving low-side MOSFETs and reading Hall-effect sensors, with the comparator forming a wake-up circuit from sleep mode.
Recommended
Battery-Powered Measurement Instrument
The PIC16CE624T-20/SO suits handheld battery-powered meters where low cost and small footprint matter more than in-field reprogrammability. Its 2.0 V to 6.0 V operating voltage range covers two-cell alkaline or single-cell Li-ion packs directly, and the integrated analog comparators with programmable voltage reference detect battery low-voltage conditions without external components. The 128-byte EEPROM stores user calibration constants, and the 0C to 70C range covers typical indoor instrument use. With 20 MHz peak clock and selectable low-frequency oscillator modes, firmware can drop the system clock during idle periods to extend battery life. Typical placement: 18-SOIC on a 2-layer PCB driving a 7-segment LCD or OLED via I/O, with the comparator forming the low-battery warning trigger.
Recommended
Educational and Hobby Embedded Platform
The PIC16CE624T-20/SO is a practical teaching microcontroller because of its 35-instruction RISC architecture that students can master in a single lab session. With 1.75 KB OTP and 96 bytes RAM, the part supports introductory projects like LED blinkers, keypad locks, and simple serial communications. The 18-SOIC package is breadboard-compatible via SOIC-to-DIP adapter boards, and Microchip's MPLAB IDE with Hi-Tech C or MPASM supports the part on Windows, Linux, and macOS hosts. The two comparators teach analogue threshold concepts without external op-amps, and the watchdog timer introduces students to embedded reliability techniques. Typical placement: in a course lab kit alongside a PICkit programmer, with students writing assembly or C code and committing to OTP devices for final project demonstration.
Recommended
Smart Sensor Node with Analog Front-End
The PIC16CE624T-20/SO works as a smart sensor node controller where its two integrated analog comparators front-end signals from thermistors, photodiodes, or Hall-effect sensors without external op-amps. The 1.75 KB OTP program memory holds the threshold detection and serial reporting firmware, while the 128 bytes of EEPROM store per-node calibration data written at factory calibration and never modified in the field. The 20 MHz instruction cycle supports a software UART at 9600 to 38400 baud for sensor data transmission, and brown-out detect plus watchdog timer ensure reliable operation across supply fluctuations. Typical placement: 18-SOIC at the heart of a sensor module with a UART-to-RS485 transceiver, powered from a 3.3 V or 5 V regulated rail.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624T-20/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624T-20E/SO | PIC16CE624-20I/SO | PIC16CE624-20E/SO | PIC16CE624-20/SO | PIC16CE624-30/SO | PIC16CE623-20/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC (7.50 mm) | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 30 MHz | 20 MHz |
| Program Memory Size | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP | 1.75 KB (1K x 14) OTP |
| EEPROM Data Memory | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 64 bytes (-50%) |
| Operating Temperature | 0 C to +70 C | -40 C to +125 C | -40 C to +85 C | -40 C to +125 C | 0 C to +70 C | 0 C to +70 C | 0 C to +70 C |
| Packaging Format | Tape & Reel (T-suffix) | Tape & Reel | Tube | Tube | Tube | Tube | Tube |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Key Differentiators
- Tape-and-reel packaging for high-volume SMT assembly (vs PIC16CE624-20/SO)
- Commercial temperature grade for cost-optimised indoor designs (vs PIC16CE624T-20E/SO)
- 128-byte EEPROM for non-volatile storage (vs PIC16CE623-20/SO)
Design Notes
OTP memory cannot be erased or rewritten, so firmware must be fully validated on a windowed PIC16C624 JW part or Flash-based PIC16F627A-I/SO before committing the production order. According to Microchip programming guidance, OTP programming is one-shot and any bit programmed to zero cannot be recovered. This is critical for high-volume runs because each rejected device is scrap.
Place a 100 nF decoupling capacitor as close as possible to the Vdd pin (pin 14) and a 10 uF bulk capacitor near the IC. According to Microchip application note AN585, the brown-out detect voltage threshold should be verified against the minimum operating voltage of 2.0 V for the chosen oscillator mode. Below 2.0 V, oscillator start-up becomes unreliable and EEPROM write operations may corrupt.
Keep crystal or resonator traces short and surround them with a ground pour to minimise EMI coupling into the analog comparators. According to the Microchip datasheet, the analog comparator inputs are highly sensitive to digital switching noise; route them away from the oscillator and PORTB digital lines. A guard ring connected to analog ground around the comparator inputs further improves noise immunity in noisy industrial environments.
When using the internal RC oscillator, supply voltage drift affects clock frequency by approximately 1 percent per volt, which may violate timing margins for UART or PWM applications. According to Microchip datasheet electrical characteristics, the internal RC oscillator tolerance is +/- 1 percent at 25 C and 5 V but widens at voltage and temperature extremes. For serial communications, calibrate against a software UART bit-bang routine or use an external crystal for accuracy.
Compliance Information
RoHS-compliant per Microchip product page ordering information. The commercial 0C to 70C temperature grade is not AEC-Q100 qualified; for automotive deployments, choose PIC16CE624T-20E/SO with extended temperature range. Halogen-free status is not explicitly stated in the available web data.