PIC16CE625T-20I/SS - 20MHz 8-bit OTP MCU w/EEPROM | Microchip
MPN: PIC16CE625T-20I/SS β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.49 | $1.49 |
| 10 | $1.39 | $13.90 |
| 100 | $1.28 | $128.00 |
| 500 | $1.15 | $575.00 |
| 1,000 | $1.02 | $1,020.00 |
PIC16CE625T-20I/SS Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, peripherals and I/O on one silicon die. In the broader embedded taxonomy, this device sits under: MCU -> 8-bit microcontroller -> Harvard-architecture MCU -> CMOS RISC MCU -> PIC16C-family mid-range core. The 'CE' suffix in the part number signals Microchip's EPROM program memory variant with integrated EEPROM, intended for prototyping and low-volume production prior to mask-ROM conversion.
Key differentiating features include 3.5 KB of one-time-programmable (OTP) program memory, 128 bytes of RAM, 13 general-purpose digital I/O pins sharing 18/20-pin packages, and on-chip peripherals such as Brown-out Detect (BOD), Power-On Reset (POR), Watchdog Timer (WDT), an 8-bit timer/counter, and an analog comparator. The Harvard RISC core offers only 35 single-word instructions, a 2-cycle branch, and a hardware interrupt controller, giving the part its reputation for fast context-switch responsiveness.
Architecture depth: the PIC16CE62X uses Microchip's mid-range 14-bit instruction word, an 8-level stack and 8-bit data path. The integrated comparator with programmable reference, plus the EPROM-based code store, makes this generation ideal for designs where in-system re-programmability was not yet mandatory but field-configurable trim and data logging via the on-die EEPROM were required.
Typical applications include consumer appliance controllers, sensor signal conditioning front-ends (paired with the on-chip comparator), low-cost PWM-driven LED or motor control, and industrial keypad/IO expansion modules. The 18/20-pin SSOP/SOIC footprint also makes it a drop-in candidate for legacy designs originally built on PIC16C62x mask-ROM parts. When designing with this part, note that OTP requires one-time UV-erase-and-reprogram at the device programmer; for in-application firmware updates, migrate to the PIC16F62x flash-based family.
Drop-in alternatives for PIC16CE625T-20I/SS β 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 PIC16CE625T-20I/SS (same form factor and footprint) β differing in Timers, Package, I/O Pins, EEPROM Data Memory, Program Memory Size.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16CE625T-20I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE625-20I/SS
β Drop-Inβ In Stock
$1.48 / Unit
View Datasheet βPIC16CE625T-20/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE625T-04I/SS
β Drop-Inβ In Stock
$1.92 / Unit
View Datasheet βPIC16F625T-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F630T-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE625T-20I/SS Maximum Ratings & Electrical Characteristics
| Product Family | PIC16C Mid-Range 8-bit MCU |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3.5 KB (2K x 14) |
| RAM | 128 bytes |
| EEPROM Data Memory | 128 bytes |
| CPU Core | PIC16 Harvard RISC, 14-bit instruction |
| Instruction Set | 35 single-word instructions |
| Instruction Cycle Time | 200 ns at 20 MHz |
| Maximum Clock Frequency | 20 MHz |
| Supply Voltage (VDD) | 3.0 V to 5.5 V |
| I/O Pins | 13 GPIO |
| Timers | 1 x 8-bit Timer/Counter |
| On-chip Peripherals | Brown-out Detect, POR, WDT, Analog Comparator |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 20-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| Delivery Form | Tape & Reel |
| RoHS Status | Compliant |
PIC16CE625T-20I/SS Pin Configuration
| Pin 1 | RA2 β Port A bit 2 / analog channel |
| Pin 2 | RA3 β Port A bit 3 / analog channel |
| Pin 3 | RA4 β Port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR β Master Clear (reset, active low) |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RB0/INT β Port B bit 0 / external interrupt |
| Pin 7 | RB1 β Port B bit 1 |
| Pin 8 | RB2 β Port B bit 2 |
| Pin 9 | RB3 β Port B bit 3 |
| Pin 10 | RB4 β Port B bit 4 |
| Pin 11 | RB5 β Port B bit 5 |
| Pin 12 | RB6 β Port B bit 6 / ICSP clock |
| Pin 13 | RB7 β Port B bit 7 / ICSP data |
| Pin 14 | VDD β Positive supply (3.0 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT β Oscillator output / clock out |
| Pin 16 | OSC1/CLKIN β Oscillator input / external clock |
| Pin 17 | RA0 β Port A bit 0 / analog channel 0 |
| Pin 18 | RA1 β Port A bit 1 / analog channel 1 |
| Pin 19 | RA5 β Port A bit 5 |
| Pin 20 | VDD β Positive supply (alternate VDD pin) |
Typical Applications
PIC16CE625T-20I/SS is suitable for 6 applications: Consumer Appliance Control Board, Sensor Signal Conditioning Front-End, LED Lighting Controller (DMX / PWM), Industrial Keypad / IO Expansion Module, Automotive Body Electronics (Non-Safety), Battery-Powered Portable Instrument.
Consumer Appliance Control Board
The PIC16CE625T-20I/SS fits consumer appliance controllers - washing machines, dishwashers, microwave ovens - because it offers 13 GPIO to drive relays, seven-segment displays, keypads and indicator LEDs without external I/O expanders. The 200 ns instruction cycle supports software PWM for motor speed control and triac phase-angle firing for heater elements, while the on-chip comparator can implement zero-crossing detection directly off the mains via a resistor network. The 3 V to 5.5 V supply range simplifies designs that power the MCU directly from a rectified 5 V rail. With 3.5 KB of OTP and 128 bytes of EEPROM, the part stores user-set cycles, calibration constants and diagnostic counters without external non-volatile memory, reducing BOM cost.
Recommended
Sensor Signal Conditioning Front-End
With its on-chip analog comparator and programmable voltage reference, the PIC16CE625T-20I/SS is ideal for sensor signal conditioning front-ends that convert analog transducer outputs into clean logic-level decisions. Typical pairings include thermistor temperature sensing (where the comparator thresholds the NTC bridge), photodiode ambient-light detection, and Hall-effect rotor-position sensing in BLDC fan controllers. The 20 MHz clock enables sub-microsecond comparator debounce and software-implemented hysteresis, while the 128-byte EEPROM stores per-unit calibration coefficients written during end-of-line test. The industrial -40 C to +85 C temperature grade ensures the front-end survives harsh enclosures.
Recommended
LED Lighting Controller (DMX / PWM)
Architectural and entertainment LED fixtures benefit from the PIC16CE625T-20I/SS's 13 GPIO driving multiple MOSFET gate drivers and PWM channels. The PIC16 mid-range core implements 8-bit software PWM at refresh rates above 1 kHz with 13 independent channels, sufficient for direct RGB+W color-mixing fixtures. DMX-512 reception is bit-banged in software using the external interrupt on RB0 and the hardware UART, leaving the on-chip comparator and timer free for thermal-foldback sensing via an NTC on the LED heatsink. The 128-byte EEPROM stores DMX start addresses and color presets for fixture recall.
Recommended
Industrial Keypad / IO Expansion Module
Modbus, I2C or SPI-based remote IO modules often use a PIC16CE625T-20I/SS to scan a 4x4 matrix keypad or 8-channel dry-contact input board over an isolated RS-485 link. The 13 GPIO are exactly sufficient for the matrix row/column drivers plus status LEDs, and the PIC16 mid-range core executes Modbus RTU frame parsing in less than 200 us at 20 MHz. The on-chip EEPROM stores node address, baud rate and parity settings that survive power cycles. The 3 V to 5.5 V supply range allows direct operation from a 24 V industrial bus via a TO-220 LDO.
Recommended
Automotive Body Electronics (Non-Safety)
Within non-safety automotive body electronics - interior lighting controllers, seat-position switches, wiper timers - the PIC16CE625T-20I/SS is a strong fit when AEC-Q100 qualification is not mandatory. The -40 C to +85 C industrial temperature grade covers cabin environments, while the Brown-out Detect and Watchdog Timer protect against load-dump transients and firmware lockups. The 3.5 KB OTP memory and 13 GPIO support multi-channel PWM for window/lift control and indicator blinking. Designers should add a TVS diode array and reverse-battery protection on VDD per automotive design practices.
Recommended
Battery-Powered Portable Instrument
Handheld meters, environmental dataloggers and remote-control transmitters benefit from the PIC16CE625T-20I/SS's low-power 8-bit mid-range core and wide 3 V to 5.5 V supply range, which works directly from a 2-cell alkaline or single-cell Li-ion pack. The Watchdog Timer and sleep-mode instruction (SLEEP) draw micro-amps between measurements, while the internal comparator wakes the part on a sensor threshold crossing. The 128-byte EEPROM logs measurement history with timestamp counters, surviving battery replacement. For designs that need even lower sleep current, the PIC16F690-I/SS flash variant offers the same peripherals with deep-sleep nanoamp current.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE625T-20I/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE625-20I/SS | PIC16CE625T-20/SS | PIC16F625T-I/SS | PIC16F630T-I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP (5.30 mm) | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 20-SSOP (5.30 mm) - same | 14-SSOP - different pin count |
| Program Memory | 3.5 KB OTP EPROM | 3.5 KB OTP EPROM - same | 3.5 KB OTP EPROM - same | 3.5 KB flash - in-system reprogram | 1 KB flash - smaller |
| Max Clock Frequency | 20 MHz | 20 MHz - same | 20 MHz - same | 20 MHz - same | 20 MHz - same |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V - same | 3.0 V to 5.5 V - same | 2.0 V to 5.5 V - wider | 2.0 V to 5.5 V - wider |
| Temperature Range | -40 C to +85 C (Industrial) | -40 C to +85 C - same | 0 C to +70 C (Commercial) | -40 C to +85 C - same | -40 C to +85 C - same |
| GPIO Count | 13 | 13 - same | 13 - same | 13 - same | 12 - fewer |
| In-system Reprogrammable | No (OTP) | No (OTP) - same | No (OTP) - same | Yes (Flash) - upgrade | Yes (Flash) - upgrade |
Key Differentiators
- Integrated 128-byte EEPROM for data storage without external memory chip (vs PIC16C624-20I/SS)
- Industrial -40 C to +85 C temperature grade (vs PIC16CE625T-20/SS)
- 20 MHz operation with 200 ns instruction cycle enables real-time control loops (vs PIC16CE625T-04I/SS)
Design Notes
Place a 100 nF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 14) and a bulk 10 uF tantalum or aluminum-polymer capacitor at the PCB power entry. The PIC16CE625T-20I/SS has two VDD pins (14 and 20) on the SSOP package; both must be decoupled separately to suppress switching noise from the internal clock driver. Brown-out Detect is factory-trimmed; for 3.3 V-only systems, verify the BOD trip does not falsely reset during power-ramp.
The PIC16CE625T-20I/SS uses OTP EPROM and CANNOT be electrically erased or reprogrammed in-circuit. Attempting ICSP reprogramming on a programmed OTP device leaves the existing code intact and may damage the silicon. For development, use a windowed CERDIP PIC16CE625 sample, or migrate to the flash-based PIC16F625-I/SS that is pin-compatible and supports ICSP. Never assume OTP parts are pre-blanked; always read back ID and verify before programming.
Keep the OSC1/OSC2 traces short (under 10 mm) and guard them with a ground ring to minimize EMI pickup. For crystal mode, use a fundamental-cut AT-cut crystal rated for 20 pF load with two 22 pF ceramic capacitors to ground. For RC oscillator mode (low-cost applications), calculate R from the manufacturer's RC table - typical 5 kohm with 22 pF gives ~4 MHz. The ICSP pins RB6/RB7 share general-purpose I/O, so add 10 kohm pull-downs on those lines to prevent false triggering during reset.
The SSOP-20 package has a thermal resistance of approximately 100 C/W junction-to-ambient, well above the 50 C/W typical of larger SOIC packages. At full 20 MHz clock and all peripherals enabled, the part dissipates under 50 mW - thermal rise is negligible. However, in enclosed 85 C environments, derate the clock by 10 percent or move to the I-grade 'E' (extended) variant if available.
Compliance Information
RoHS compliant per Microchip product declaration; REACH SVHC compliant as of 2026-09-19; not AEC-Q100 qualified (industrial grade only); halogen-free status not explicitly stated in verified data.
