PIC16CE625-20I/SS - 8-bit OTP MCU, 20MHz, 3.5KB | Microchip
MPN: PIC16CE625-20I/SS β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.55 | $2.55 |
| 10 | $2.34 | $23.40 |
| 100 | $2.1 | $210.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.65 | $1,650.00 |
| 3,000 | $1.48 | $4,440.00 |
PIC16CE625-20I/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data memory, and peripherals such as timers, comparators, and I/O. OTP (One-Time-Programmable) MCUs use EPROM-based program memory that is permanently written once during production programming, providing low unit cost at moderate volumes compared to flash-based devices. The PIC16CE62X family belongs to the PICmicro family of fully-static, RISC-architecture microcontrollers and sits within Microchip's legacy mid-range (14-bit instruction) MCU portfolio, sharing the same instruction set with PIC16F and PIC16C cousins.
Key features include 35 single-word instructions (all single-cycle except program branches which take two cycles), an operating voltage range of 3.0V to 5.5V, and an industrial temperature range of -40C to +85C (denoted by the 'I' suffix). The device offers a programmable code-protection feature, a watchdog timer with its own on-chip RC oscillator, power-saving sleep mode, in-circuit serial programming (ICSP), and an internal 4 MHz RC oscillator for flexible clocking.
Architecturally, the PIC16CE625 uses a Harvard-style RISC core with separate program and data buses, a 14-bit instruction word, and a hardware stack for subroutine handling. Peripherals include one 8-bit timer (TMR0) with an 8-bit prescaler, a 16-bit timer/counter (TMR1) on larger family members, an analog comparator with programmable reference, and a synchronous/asynchronous serial port (SSP) on selected variants. The integrated 128-byte EEPROM provides non-volatile data storage for user parameters, calibration values, or runtime settings that survive power cycles.
Typical applications include industrial control systems, low-power IoT edge nodes, embedded automation, motor control (BLDC and stepper drivers), metering (utility, energy, flow), low-power remote sensor boards, and consumer appliance control. The wide operating voltage and industrial temperature grade also suit battery-powered or harsh-environment designs.
When designing with this device, allocate sufficient program memory headroom for application growth (the 2K x 14 OTP memory cannot be expanded after programming). External decoupling (100 nF + 10 uF) near VDD/VDD2 pins is mandatory to suppress digital switching noise from disturbing the analog comparator reference. Use the MCLR pull-up and ICSP lines correctly to ensure in-system programming works in production.
This page synthesizes distributor pricing, drop-in compatible PIC16CE62X family alternates, and practical design notes not found on a single distributor listing.
Drop-in alternatives for PIC16CE625-20I/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 PIC16CE625-20I/SS (same form factor and footprint) β differing in Package, Program Memory Size, Program Memory Type, Operating Temperature Range, Timers.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16CE623-20/SS
β Drop-Inβ In Stock
$1.06 / Unit
View Datasheet βPIC16CE624-20/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16F628A-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE625T-20I/SS
β Drop-Inβ In Stock
$1.02 / Unit
View Datasheet βPIC16CE625-20I/SS Maximum Ratings & Electrical Characteristics
| Product Family | PIC16CE62X (PICmicro mid-range, 14-bit instruction) |
| Core Architecture | 8-bit RISC, fully-static CMOS |
| Program Memory Type | OTP (One-Time-Programmable EPROM) |
| Program Memory Size | 3.5 KB (2K x 14) |
| Data EEPROM | 128 bytes |
| RAM | 128 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns (50 ns at 20 MHz) |
| Operating Voltage Range | 3.0 V to 5.5 V |
| Operating Temperature Range | -40 C to +85 C (industrial, 'I' suffix) |
| I/O Pins | 13 |
| Package | 20-pin SSOP (5.30 mm body) |
| Mounting Type | Surface Mount |
| Analog Peripherals | 1 on-chip analog comparator with programmable reference |
| Timers | TMR0 (8-bit w/ prescaler); TMR1 (16-bit) on family variants |
| Special Features | Watchdog Timer, ICSP, Sleep mode, internal 4 MHz RC oscillator |
PIC16CE625-20I/SS Pin Configuration
| Pin 1 | RA2 β Bidirectional I/O port A bit 2; analog comparator input |
| Pin 2 | RA3 β Bidirectional I/O port A bit 3; analog comparator reference input |
| Pin 3 | RA4 β Bidirectional I/O port A bit 4; TMR0 clock input |
| Pin 4 | MCLR/RA5 β Master clear reset (input) or general I/O RA5 |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RB0/INT β Bidirectional I/O port B bit 0; external interrupt input |
| Pin 7 | RB1 β Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 β Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 β Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 β Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 β Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 β Bidirectional I/O port B bit 6; ICSP clock |
| Pin 13 | RB7 β Bidirectional I/O port B bit 7; ICSP data |
| Pin 14 | VDD β Positive supply voltage (3.0V to 5.5V) |
| Pin 15 | OSC2/CLKOUT β Oscillator output or instruction clock output |
| Pin 16 | OSC1/CLKIN β Oscillator input or external clock input |
| Pin 17 | RA0 β Bidirectional I/O port A bit 0; analog comparator output |
| Pin 18 | RA1 β Bidirectional I/O port A bit 1; analog comparator input |
| Pin 19 | RC4 β Bidirectional I/O port C bit 4 |
| Pin 20 | RC5 β Bidirectional I/O port C bit 5 |
Typical Applications
PIC16CE625-20I/SS is suitable for 6 applications: Industrial Control Systems, Embedded Automation & Sensor Nodes, Motor Control, Utility Metering & Energy Measurement, Consumer Appliance Control, Low-Power Battery-Powered Devices.
Industrial Control Systems
The PIC16CE625-20I/SS suits industrial control panels with its 8-bit RISC core running at 20 MHz (200 ns instruction cycle) and 3.5 KB OTP program memory, sufficient for PLC logic replacement, sensor polling, and actuator driving. The on-chip analog comparator enables threshold detection without external circuitry, while 13 I/O pins support relay, opto-isolator, and HMI interface needs. The 3.0V-5.5V operating range covers 24V-sourced 5V rails typical of industrial cabinets. Industrial -40 C to +85 C grade plus integrated watchdog timer provide robust operation in noisy factory environments with periodic firmware-driven self-checks. In a typical design, the MCU reads digital inputs from limit switches, drives motor contactors via opto-isolators, and logs state changes to internal 128-byte EEPROM for fault diagnostics.
Recommended
Embedded Automation & Sensor Nodes
The PIC16CE625-20I/SS fits embedded automation nodes where deterministic 200 ns instruction execution and low sleep-mode current matter. With 128-byte RAM and on-chip comparator, the MCU can sample a thermistor or analog sensor, perform threshold checks, and drive a digital output without external ADC complexity. The integrated 128-byte EEPROM stores calibration constants that survive power cycles, critical for field-deployed metering and sensor boards. Industrial temperature grade (-40 C to +85 C) supports outdoor enclosures, and the SSOP-20 package footprint remains compatible with the modern PIC16F628A-I/SS for future flash migration. Combined with an external SPI ADC and a 433 MHz/2.4 GHz transceiver module, the MCU forms a low-power wireless sensor node for building automation and remote monitoring.
Recommended
Motor Control
The PIC16CE625-20I/SS handles small stepper and brushed DC motor control loops at 20 MHz with 3.5 KB program memory, providing sufficient code space for PWM generation, commutation tables, and closed-loop PI control. The integrated analog comparator can sense back-EMF for sensorless trapezoidal commutation on BLDC motors, eliminating external comparators. Three timer modules (TMR0 8-bit, TMR1 16-bit on family variants, TMR2) deliver hardware PWM without software overhead. Industrial temperature grade and 13 I/O pins support up to 6 PWM channels (limited by pin count) plus H-bridge gate drive enable signals. Pair with external MOSFET gate drivers like TC4427 for high-side/low-side switching.
Recommended
Utility Metering & Energy Measurement
The PIC16CE625-20I/SS is well-suited to single-phase energy metering, where its 20 MHz core performs pulse-counting, RMS calculation, and LCD drive multiplexing within tight timing budgets. The 128-byte EEPROM stores meter ID, calibration coefficients, and tamper flags persistently across power cycles - essential for utility billing integrity. The on-chip analog comparator can detect zero-cross of the mains waveform for phase-angle measurement, while 13 I/O pins drive LED pulse indicators and a low-cost character LCD via software bit-banging. The 3.0V-5.5V operating range accommodates battery-backed designs that retain metering data during line outages. With its SSOP-20 form factor and industrial temperature rating, the MCU fits the compact, sealed enclosures of residential and light-commercial meters.
Recommended
Consumer Appliance Control
The PIC16CE625-20I/SS targets white goods and small kitchen appliances where 8-bit MCU performance and 3.5 KB OTP program memory meet user-interface, sensor, and motor control requirements. Its 13 I/O pins drive button matrices, LED indicators, seven-segment displays, and triac interfaces for AC load switching. The 20 MHz clock provides responsive keypad debounce and PWM for variable-speed motor control in mixers, blenders, and washing-machine pumps. Integrated EEPROM stores user preferences (cycle count, language, favorite programs), while ICSP enables factory programming and field firmware updates during development. Industrial temperature grade and 5.5V tolerance allow direct connection to rectified 5V rails derived from line-powered supplies.
Recommended
Low-Power Battery-Powered Devices
The PIC16CE625-20I/SS supports battery-powered applications through its 3.0V minimum supply (compatible with two alkaline cells), low sleep-mode current, and integrated 4 MHz RC oscillator that eliminates external crystal draw during standby. The on-chip EEPROM retains user settings without external serial memory, reducing total BOM cost. Industrial temperature grade and 5.5V tolerance protect against USB-charge-induced overvoltage when paired with a battery management front-end. Typical designs include remote controls, electronic locks, wireless sensor tags, and portable instruments where the 20 MHz active performance handles button-scanning, RF encoder routines, or display updates while the MCU spends most of its time in sleep mode drawing microamps. The SSOP-20 package is well-suited for handheld enclosures.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE625-20I/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE623-20/SS | PIC16CE624-20/SS | PIC16F628A-I/SS |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same |
| Program Memory | 3.5 KB OTP | 2 KB OTP (-43%) | 1 KB OTP (-71%) | 3.5 KB Flash (reprogrammable) |
| RAM | 128 bytes | 128 bytes | 128 bytes | 224 bytes (+75%) |
| EEPROM | 128 bytes | 0 bytes (no E suffix) | 128 bytes | 128 bytes |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz |
| Operating Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 2.0V to 5.5V (wider) |
| Temperature Range | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
Key Differentiators
- Integrated 128-byte on-chip EEPROM data memory (vs PIC16CE623-20/SS)
- Larger program memory than family variants (vs PIC16CE624-20/SS)
- Drop-in compatibility with modern flash-based PIC16F628A-I/SS (vs PIC16CE625-04/SO)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 14), with a bulk 10 uF tantalum or aluminum capacitor on the same supply rail. For battery-backed designs, route the VDD sense through a diode-or-MOSFET selector to retain RAM and EEPROM during main-power loss; verify that the residual supply stays within 3.0V-5.5V to preserve EEPROM retention. Add a ferrite bead if the L-series for an external analog rail is shared with digital I/O.
Route the ICSP lines (RB6=ICSPCLK, RB7=ICSDAT) with short, noise-immune traces to a 6-pin header; keep RB6/RB7 free of heavy switching loads to prevent in-system programming errors. Place the MCLR pull-up resistor (typically 10 kOhm) close to the MCU and ensure MCLR trace length is minimized; add a 100 nF cap to ground on MCLR if noisy reset conditions are expected. Decouple the OSC1/OSC2 crystal load capacitors (typically 15-33 pF) and keep crystal traces short and symmetric.
OTP program memory cannot be erased or rewritten once programmed - budget code space and verify firmware in a flash-based emulator (e.g., PIC16F628A-I/SS) before committing to OTP production. Do not exceed 25 mA per I/O pin or 200 mA total VDD current per port. The on-chip analog comparator shares pins with PORTA; avoid driving the comparator input pins as outputs simultaneously. Always specify the 'I' (industrial) suffix for -40 C to +85 C operation; bare PIC16CE625-20/SS or PIC16CE625-20E/SS have different temperature grades.
Use a 4-layer PCB with a dedicated ground plane if the design combines analog comparator sensing with PWM motor drive, otherwise the comparator can latch spuriously. Keep analog comparator traces (RA0-RA3) away from PWM-driven I/O (RC4/RC5, RB0-RB7 if used as PWM) by at least 5 mm or guard with a grounded trace. Place the bulk 10 uF bypass near the analog rail; if the comparator drives a high-impedance input, add a small RC filter (10 kOhm + 100 pF) at the comparator input.
Compliance Information
RoHS, REACH, lead-free, halogen-free, and conflict-minerals status were not present in the verified web data; compliance_info fields are set to 'unknown'. The part is industrial temperature grade (-40 C to +85 C) per the 'I' suffix but is NOT AEC-Q100 qualified - not recommended for automotive safety-critical applications.
