PIC16CE624T-04/SS - 8-Bit OTP MCU, 4MHz, 1.75KB | Microchip
MPN: PIC16CE624T-04/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.92 | $7.92 |
| 10 | $7.13 | $71.30 |
| 100 | $5.97 | $597.00 |
| 500 | $5.32 | $2,660.00 |
| 1,000 | $4.75 | $4,750.00 |
PIC16CE624T-04/SS Overview
An OTP (One-Time Programmable) microcontroller is a type of embedded processor whose program memory can be written to once during programming and then becomes read-only, making it well-suited to high-volume, cost-sensitive applications where firmware does not need field updates. Microcontrollers of this class sit within the broader 8-bit MCU taxonomy: 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The PIC16CE624 uses a RISC instruction set with 35 single-word instructions and 133 ns instruction execution time, delivering deterministic performance for timing-sensitive control loops. Integrated peripherals include two analog comparators, a programmable voltage reference, Power-on Reset (POR), Brown-out Detect/Reset (BOD), and a Watchdog Timer (WDT), reducing external component count.
The '04' speed grade denotes a 4 MHz maximum oscillator input, and the 'T' suffix indicates Tape and Reel packaging for high-volume SMT assembly. The 'SS' suffix designates the 20-pin SSOP (Shrink Small Outline Package). This combination targets production-line assembly rather than prototype breadboarding, where PDIP or SOIC variants are typically preferred. The combination of small footprint, on-chip EEPROM, and rich analog peripherals makes the PIC16CE624T-04/SS attractive for compact, mixed-signal embedded designs.
Typical applications include consumer appliances, automotive body and lighting controllers, sensor signal conditioning, low-cost motor control, and battery-powered instruments where on-chip EEPROM stores calibration constants. Industrial sensor interfaces and remote-control transmitters also benefit from the integrated comparators and WDT, which together enable robust, unattended operation in electrically noisy environments.
When designing with this device, plan the firmware carefully before programming because OTP memory cannot be erased or rewritten - any code bug becomes permanent. Reserve 128 bytes of EEPROM for non-volatile data only, not for program variables, and ensure the Brown-out voltage threshold is configured to match your supply rail. Programming requires a Microchip-compatible device programmer that supports the PIC16CE62X series.
This page synthesizes distributor stock and pricing, drop-in same-package alternatives, and practical design notes that are not consolidated in any single source including the manufacturer datasheet. Pricing references are stated as of 2026-09-19.
Drop-in alternatives for PIC16CE624T-04/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-04/SS (same form factor and footprint) — differing in Package, Core Architecture, Mounting Type, Program Memory Size, Instruction Cycle Time.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE624-04/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE624T-20/SS
✅ Drop-In✓ In Stock
$2.2 / Unit
View Datasheet →PIC16CE624T-04I/SS
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC16CE624-04I/SS
✅ Drop-In✓ In Stock
$1.49 / Unit
View Datasheet →PIC16CE624T-04E/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE624T-20I/SS
✅ Drop-In✓ In Stock
$2.18 / Unit
View Datasheet →PIC16F84A-04/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16F628A-04/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624T-04/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Core Size | 8-bit |
| Maximum Clock Frequency | 4 MHz |
| Instruction Execution Time | 200 ns (4 MHz, 1-cycle instructions) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14 words) |
| RAM Size | 96 bytes |
| EEPROM Data Memory | 128 bytes |
| Number of I/O Pins | 13 |
| Number of Instructions | 35 single-word |
| Integrated Comparators | 2 |
| Programmable Voltage Reference | Yes |
| Peripherals | POR, Brown-out Detect/Reset, WDT |
| Package | 20-pin SSOP |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (per DigiKey product listing) |
PIC16CE624T-04/SS Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2; analog comparator input |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3; analog comparator input |
| Pin 3 | RA4/T0CKI — Bidirectional I/O port A bit 4; Timer 0 clock input (open-drain) |
| Pin 4 | MCLR/VPP — Master Clear reset input (active low) / programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Bidirectional I/O port B bit 0; external interrupt input |
| Pin 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O port B bit 4; interrupt-on-change |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5; interrupt-on-change |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6; interrupt-on-change; serial programming clock |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7; interrupt-on-change; serial programming data |
| Pin 14 | VDD — Positive supply voltage |
| Pin 15 | OSC2/CLKOUT — Oscillator crystal output / clock output |
| Pin 16 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 17 | RA0 — Bidirectional I/O port A bit 0; analog comparator input |
| Pin 18 | RA1 — Bidirectional I/O port A bit 1; analog comparator input |
| Pin 19 | RA5 — Bidirectional I/O port A bit 5; comparator output |
| Pin 20 | VSS — Ground reference |
Typical Applications
PIC16CE624T-04/SS is suitable for 6 applications: Consumer Appliance Control, Automotive Body and Lighting Controllers, Industrial Sensor Interface and Signal Conditioning, Low-Cost DC Motor and Fan Speed Control, Remote Control and RF Transmitter Encoder, Battery-Powered Measurement Instrument.
Consumer Appliance Control
The PIC16CE624T-04/SS fits consumer appliance control boards because its 128 bytes of on-chip EEPROM stores user-selectable settings such as wash cycle, temperature preset, and timer state through power cycles. The 4 MHz core and 35-instruction PIC16 RISC set deliver deterministic 200 ns instruction execution time for real-time keypad scanning and relay sequencing. Two integrated comparators handle sensor inputs (thermistor, water level) without an external analog front end. Brown-out Detect and Watchdog Timer provide unattended recovery from supply glitches. Compared with a discrete logic implementation, this single-chip solution reduces BOM count, PCB area, and assembly cost in high-volume appliance production.
Recommended
Automotive Body and Lighting Controllers
The PIC16CE624T-04/SS suits automotive body controllers such as interior lighting dimmers, mirror position controllers, and seat memory modules. Its 13 digital I/O pins drive multiple LED banks and read rotary encoder inputs directly, while the two integrated comparators process analog signals such as battery voltage or current-sense for load diagnostics. The 128-byte EEPROM retains trim settings (dim level, mirror position) across battery disconnects, and the Brown-out Detect block protects against automotive cranking transients. The 20-pin SSOP footprint fits within compact under-dash modules. For under-hood or AEC-Q100 applications, choose the PIC16CE624-04I/SS industrial or automotive-qualified equivalent instead.
Recommended
Industrial Sensor Interface and Signal Conditioning
The PIC16CE624T-04/SS is well matched to industrial 4-20 mA loop sensor transmitters and bridge sensor conditioning boards. The two on-chip comparators with programmable voltage reference form a complete sigma-delta or ratiometric ADC front end without any external active components, reducing analog design effort. The 128-byte EEPROM stores calibration coefficients that are unique to each sensor, enabling per-unit field calibration. The Brown-out Detect and Watchdog Timer keep the controller operational through industrial power disturbances. The SSOP-20 footprint suits compact DIN-rail transmitter housings where PCB real estate is at a premium.
Recommended
Low-Cost DC Motor and Fan Speed Control
The PIC16CE624T-04/SS can drive low-cost BLDC or brushed DC motor speed controllers in appliance fans, small pumps, and toys. Its 13 I/O pins connect to Hall-effect sensors, PWM outputs, and direction-control FET gates directly. The 4 MHz clock is sufficient to generate a 20 kHz PWM switching frequency with 200 ns resolution for smooth torque control, and the two integrated comparators detect back-EMF zero-crossings for sensorless commutation. The on-chip EEPROM stores the last commanded speed so that the motor resumes the previous setting after a power cycle. Housed in SSOP-20, the controller fits inside small motor housings.
Recommended
Remote Control and RF Transmitter Encoder
The PIC16CE624T-04/SS functions as the encoding MCU in low-cost RF remote controls for garage doors, ceiling fans, and industrial cranes. The 1.75 KB OTP program memory holds rolling-code or fixed-code transmission algorithms and the 128-byte EEPROM stores paired-device IDs and channel settings. Brown-out Detect prevents partial transmission if battery voltage collapses mid-frame. The 4 MHz core is fast enough to generate a 1-10 kbps Manchester or PWM-modulated carrier using bit-banged I/O toggling, eliminating the need for a dedicated encoder IC. The SSOP-20 footprint fits inside a CR2032 battery-powered keyfob housing.
Recommended
Battery-Powered Measurement Instrument
The PIC16CE624T-04/SS is a good fit for handheld battery-powered measurement instruments such as digital calipers, multimeters, and environmental loggers. Its low-power CMOS design draws microamps in sleep mode, extending battery life, and the 128-byte EEPROM stores up to thousands of calibration constants and measurement log entries without external FRAM or EEPROM chips. The two comparators plus programmable voltage reference implement a low-frequency sigma-delta ADC sufficient for 12-16 bit measurement resolution when paired with an external reference resistor. The SSOP-20 footprint fits inside a 9V-battery or 2xAAA handheld enclosure. Brown-out Detect protects against low-battery corruption of measurement data.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624T-04/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624-04/SS | PIC16CE624T-20/SS | PIC16CE624T-04I/SS | PIC16CE624-04I/SS | PIC16CE624T-04E/SS | PIC16CE624T-20I/SS | PIC16F84A-04/SS | PIC16F628A-04/SS |
|---|---|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same |
| Program Memory Type | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) | OTP (1.75 KB) | Flash (1.75 KB) | Flash (3.5 KB) |
| Max Clock Speed | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| EEPROM Data Memory | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 64 bytes | 128 bytes |
| RAM Size | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 68 bytes | 224 bytes |
| Operating Temperature Range | Commercial (0C to +70C) | Commercial | Commercial | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Extended (-40C to +125C) | Industrial (-40C to +85C) | Commercial | Commercial |
| Integrated Comparators | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 0 (no comparators) | 2 |
Key Differentiators
- On-chip 128-byte EEPROM data memory not present on base PIC16C624 (vs PIC16C624 (no 'E' suffix))
- Two integrated analog comparators with programmable voltage reference (vs PIC16F84A)
- 20-pin SSOP with 13 I/O pins in compact form factor (vs PIC16C624 in PDIP-18)
Design Notes
Because the PIC16CE624T-04/SS uses OTP (One-Time Programmable) program memory, any firmware bug locked into the device becomes permanent and cannot be erased. Build and validate firmware on a JW windowed CERDIP PIC16CE624 or on a Flash-based PIC16F84A first, then port the verified code to the OTP device for production programming. Also verify programming voltage timing on MCLR/VPP per the PIC16CE62X programming specification - under-programmed cells can pass verification but fail in the field after weeks of operation.
The PIC16CE624T-04/SS supports a wide VDD range typical of PIC16 mid-range devices (commonly 2.5V to 6.0V, exact range [DATA_NEEDED] from datasheet 30212F). Brown-out Detect should always be enabled in noise-prone environments (automotive, industrial) to prevent corrupted EEPROM writes and erratic I/O behavior during supply dips. Place a 0.1 uF decoupling capacitor as close to VDD (pin 14) as possible and a bulk capacitor of at least 10 uF on the same VDD trace.
For reliable 4 MHz operation with a ceramic resonator or crystal, place the resonator within 5 mm of pins 15 (OSC2) and 16 (OSC1) and keep the trace pair short and symmetric. Guard the oscillator traces with a ground pour to prevent coupling from adjacent switching nodes (PWM FETs, relay coils). For EMI-sensitive applications such as remote-control transmitters, add a 4-layer PCB with continuous ground plane beneath the SSOP-20 footprint to reduce radiated emissions from the MCU and its I/O transitions.
The PIC16CE624T-04/SS port B pins RB4-RB7 feature interrupt-on-change; these are excellent for low-power keyboard or rotary encoder scanning but require careful software debounce because mechanical switch bounce can generate spurious interrupts for several milliseconds. For analog comparator inputs (RA0-RA3, RA5), keep analog traces short and away from digital switching lines to prevent crosstalk into the comparator reference. The on-chip programmable voltage reference is ratiometric to VDD, so supply ripple couples directly into any measurement that uses it.
Compliance Information
RoHS compliance per DigiKey product listing (digikey.com/en/products/detail/microchip-technology/PIC16CE624T-04-SS/321111). The -04 commercial grade is not AEC-Q100 qualified; for AEC-Q100 automotive applications, choose a PIC16F-series Flash equivalent with automotive qualification.
