PIC16CE624T-20/SS - 8-bit 20MHz OTP MCU 1.75KB | Microchip
MPN: PIC16CE624T-20/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.1 | $31.00 |
| 100 | $2.78 | $278.00 |
| 500 | $2.45 | $1,225.00 |
| 1,000 | $2.2 | $2,200.00 |
PIC16CE624T-20/SS Overview
An OTP microcontroller (One-Time Programmable) is a microcontroller whose program memory can be written exactly once after manufacture, making it ideal for cost-sensitive, high-volume production runs where firmware is final and field updates are not required. The PIC16CE624 belongs to the broader PIC16 family of 8-bit RISC microcontrollers, which sits under the larger 8-bit MCU category and the unified microcontroller family in the semiconductor taxonomy. The integrated 128-byte EEPROM provides non-volatile data storage distinct from program memory, supporting parameter retention, calibration data and serial-number storage.
Key features include 13 I/O pins, two on-chip analog comparators, a programmable voltage reference, a watchdog timer, and 35 single-word instructions. The device executes instructions in 200ns at 20MHz and supports in-circuit serial programming for factory or production programming of the OTP array. Brown-out reset, power-on reset and a wide 2.5V to 6.0V operating range allow direct operation from 3.3V and 5V rails.
Architecturally, the PIC16CE624 uses a Harvard RISC core with separate program and data buses, a 14-bit wide instruction word, and a 14-bit program counter that supports a 1K x 14 program space. The internal oscillator option and programmable reference reduce external component count, while the comparator output can be routed to a timer/counter capture input for simple mixed-signal interfaces.
Typical applications include appliance control front panels, security keypads, low-end remote controls, sensor signal conditioning, and other cost-sensitive embedded designs that need EEPROM-backed settings and a small analog front end. The SSOP package makes it suitable for compact PCBs where 18-pin/20-pin DIP footprint upgrades are needed.
When designing with the PIC16CE624T-20/SS, note that the OTP memory cannot be reprogrammed, so production-grade firmware and verification must be locked before programming. Industrial designers should consider the -20I or -20E temperature variants if extended range operation is required. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not found on a single datasheet page.
Drop-in alternatives for PIC16CE624T-20/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-20/SS (same form factor and footprint) — differing in Core Architecture, Package, EEPROM Data Memory, RAM Size, Program Memory Size.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE624-20/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE625T-20/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE623T-20/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624T-20I/SS
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC16CE624T-04/SS
✅ Drop-In✓ In Stock
$4.75 / Unit
View Datasheet →PIC16CE624T-20E/SS
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →PIC16CE624T-20/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Family | PIC® 16C |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM Size | 96 x 8 bytes |
| EEPROM Data Memory | 128 x 8 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Instruction Set Size | 35 single-word instructions |
| I/O Pins | 13 |
| On-chip Comparators | 2 |
| Programmable Voltage Reference | Yes |
| Watchdog Timer | Yes |
| Supply Voltage Range | 2.5 V to 6.0 V |
| Operating Temperature | 0 C to +70 C (commercial) |
| Package | 20-SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount |
PIC16CE624T-20/SS Pin Configuration
| Pin 1 | RA2 — GPIO / analog input |
| Pin 2 | RA3 — GPIO / analog input |
| Pin 3 | RA4/T0CKI — GPIO / Timer0 clock input |
| Pin 4 | RA5 — GPIO / MCLR alternate on some derivatives |
| Pin 5 | OSC1/CLKIN — Oscillator input or external clock in |
| Pin 6 | OSC2/CLKOUT — Oscillator output or clock out |
| Pin 7 | MCLR — Master clear reset (active low) |
| Pin 8 | Vss — Ground reference |
| Pin 9 | RB0/INT — GPIO RB0 / external interrupt |
| Pin 10 | RB1 — GPIO RB1 |
| Pin 11 | RB2 — GPIO RB2 |
| Pin 12 | RB3 — GPIO RB3 |
| Pin 13 | RB4 — GPIO RB4 |
| Pin 14 | RB5 — GPIO RB5 |
| Pin 15 | RB6 — GPIO RB6 / ICD clock |
| Pin 16 | RB7 — GPIO RB7 / ICD data |
| Pin 17 | RA0 — GPIO RA0 |
| Pin 18 | RA1 — GPIO RA1 |
| Pin 19 | Vdd — Positive supply |
| Pin 20 | NC — Not connected (per datasheet) |
Typical Applications
PIC16CE624T-20/SS is suitable for 6 applications: Appliance Control Front Panel, Security Keypad and Access Module, Remote Control Transmitter, Sensor Signal Conditioning Node, Battery Charger Controller (Small Cell), Industrial Timer / Counter Module.
Appliance Control Front Panel
The PIC16CE624T-20/SS is a strong fit for appliance control front panels because its 13 I/O pins directly drive 7-segment LED or LCD segments and key-scan matrices without external glue logic. The 128-byte EEPROM stores user-set parameters such as timer presets and mode selections across power cycles, and the 20MHz CPU executes the scan loop in microseconds with deterministic timing. Compared with discrete logic or 4-bit controllers, the integrated two comparators and programmable voltage reference also allow direct temperature sensing via NTC dividers, eliminating an external analog IC. The 20-SSOP footprint drops onto compact PCBs typical of microwave, dishwasher and washing-machine user interfaces.
Recommended
Security Keypad and Access Module
In security keypads and access modules the PIC16CE624T-20/SS scans 4x4 or 3x4 matrices using its 13 digital I/Os, debounces keys in firmware and validates PIN codes from the 128-byte EEPROM that survives power removal. The on-chip watchdog timer resets the device if firmware hangs, which is critical for unattended access hardware. The 20MHz core performs AES-lite or hashing routines at sufficient speed for keypad latencies under 100ms, while the OTP memory locks the access-control firmware against external read-back. Brown-out reset on Vdd guarantees a clean restart after tamper-induced voltage dips.
Recommended
Remote Control Transmitter
For low-end remote controls (TV, fan, lighting) the PIC16CE624T-20/SS reads a button matrix, encodes the command and drives an IR or RF transmitter stage directly from one of its GPIO pins. The 200ns instruction cycle easily produces the 38kHz carrier and pulse-position modulation required by common consumer IR protocols. The internal oscillator and programmable voltage reference reduce external components to just the IR LED and a BJT driver. EEPROM holds paired-device identifiers so remotes can be re-flashed at the factory only, which suits OTP memory's one-time-write economics. The SSOP-20 package fits inside slim remote housings.
Recommended
Sensor Signal Conditioning Node
In distributed sensor nodes the PIC16CE624T-20/SS reads an analog front-end via its two on-chip comparators and programmable voltage reference, converts the comparator events to digital counts through its timers, and stores calibration in the 128-byte EEPROM. This avoids external ADC ICs for threshold-detection applications such as liquid-level, proximity or over-temperature alarms. The 2.5V to 6.0V supply range allows direct battery or bus-power operation. The OTP memory secures the calibration algorithm so it cannot be cloned, and the SSOP-20 footprint is small enough for inline sensor housings.
Recommended
Battery Charger Controller (Small Cell)
The PIC16CE624T-20/SS implements CC/CV charge profiles for small Li-ion or NiMH cells using its on-chip comparators to sense Vdd, battery voltage and charge current via shunt. The programmable voltage reference sets comparator thresholds without external resistor ladders. Its 128-byte EEPROM logs cycle counts and last-full-charge timestamps across the device lifetime, while the 20MHz core supports LED or simple LCD charge-state indication. The wide 2.5V to 6.0V supply range accepts USB, wall-adapter and solar inputs directly. The SSOP-20 footprint suits compact charger PCBAs.
Recommended
Industrial Timer / Counter Module
For DIN-rail or panel-mount industrial timers the PIC16CE624T-20/SS provides an accurate time base via its internal oscillator, drives relays or triac optos from its GPIO, and stores run-hours, alarm flags and user presets in its 128-byte EEPROM. The watchdog timer prevents lockups in electrically noisy industrial environments, and brown-out reset survives brown-out events on long DC wiring. The 20MHz core supports accurate event sequencing for process timers, conveyor dwell controls or pump alternation. Designers use the OTP memory to lock calibration against field tampering. The SSOP-20 footprint allows dense PCB layouts with optoisolators and triac drivers on the same board.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624T-20/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624-20/SS | PIC16CE625T-20/SS | PIC16CE623T-20/SS | PIC16CE624T-20I/SS | PIC16CE624T-04/SS |
|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 1.75KB OTP | 1.75KB OTP | 2KB OTP | 1.75KB OTP | 1.75KB OTP | 1.75KB OTP |
| Maximum CPU Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz |
| RAM | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Comparators / Vref | 2 / Yes | 2 / Yes | 2 / Yes | No / No | 2 / Yes | 2 / Yes |
| Operating Temperature | 0C to +70C | 0C to +70C | 0C to +70C | 0C to +70C | -40C to +85C | 0C to +70C |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- On-chip 128-byte EEPROM (vs PIC16C624 (non-E base part))
- 20MHz speed grade (vs PIC16CE624T-04/SS (4MHz grade))
- Industrial temperature option on same footprint (vs PIC16CE624T-20/SS (commercial grade))
- Pin-compatible upgrade path within PIC16C family (vs PIC16CE623T-20/SS (no comparator / no Vref))
Design Notes
Decouple Vdd (pin 19) to Vss (pin 8) with a 100nF ceramic capacitor placed within 5mm of the package, plus a bulk 10uF tantalum or aluminum polymer capacitor at the board supply entry. The PIC16CE624T-20/SS draws approximately 2-5mA at 20MHz across the 2.5V-6.0V supply range, so the regulator must deliver at least 2x this continuous rating for transient headroom. Estimated: ICC ~3.5mA at 5V/20MHz typical, per Microchip PIC16CE624 datasheet DC characteristics.
Route the OSC1/OSC2 traces short and symmetric with a grounded guard ring when using a crystal. Keep the MCLR trace short and add a 100nF capacitor between MCLR and Vdd for noise immunity. Estimated: trace length under 8mm is recommended for crystals above 8MHz to avoid excess parasitic capacitance that shifts the oscillator off-frequency.
PIC16CE624 is OTP (One-Time Programmable); once written it cannot be erased, so a programming failure during production is fatal. Use Microchip's PRO MATE II or ICD2/ICD3 in verify-after-program mode, and always include a sample-checked pre-programming step. Brown-out reset and watchdog timer MUST be enabled in the configuration word for safety-critical applications; both are off by default after ICSP erasure.
The two analog comparators share input pins with digital GPIO; switch those pins to digital mode (ANSEL clear) when used as digital I/O to avoid comparator-related shoot-through current. The programmable voltage reference output can source/sink only a few hundred microamps, so buffer it externally if driving resistive loads.
Compliance Information
RoHS / REACH / lead-free status for PIC16CE624T-20/SS not stated in verified web data; consult Microchip product environmental compliance documentation. AEC-Q100 not applicable for an 8-bit OTP MCU in this application class.
