PIC16CE625-20E/P - 8-Bit 20MHz OTP MCU, 3.5KB, DIP-18 | Microchip
MPN: PIC16CE625-20E/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.95 | $7.95 |
| 10 | $7.45 | $74.50 |
| 100 | $6.8 | $680.00 |
| 500 | $6.05 | $3,025.00 |
| 1,000 | $5.3 | $5,300.00 |
PIC16CE625-20E/P Overview
The PIC16CE625 belongs to the PIC16CE62X subfamily of CMOS, fully-static 8-bit microcontrollers with on-chip EEPROM data memory. The PIC (Peripheral Interface Controller) architecture pioneered by Microchip is a Harvard-architecture RISC design in which program and data memories occupy separate address spaces, enabling single-cycle instruction execution (200 ns at 20 MHz) for all instructions except program branches. The architecture sits in the broader microcontroller hierarchy: microcontroller -> RISC MCU -> 8-bit MCU -> embedded controller -> semiconductor IC. The on-chip EEPROM provides non-volatile data storage without external serial EEPROM, simplifying BOM for parameter storage.
Key features of this part include a 13-bit instruction word, 35 single-word instructions, 8-level hardware stack, 13 I/O pins with individual direction control, an 8-bit timer/counter (TMR0) with 8-bit programmable prescaler, a Watchdog Timer with independent on-chip RC oscillator, and Power-on Reset (POR) / Brown-out Reset (BOR) circuitry. The part accepts an internal or external clock source and integrates a 4 MHz internal RC oscillator option. Supply voltage operates from 3.0 V to 5.5 V, making it compatible with both 3.3 V and 5 V rails.
The PIC16CE625-20E/P uses Microchip's OTP EPROM process for program memory, which is one-time programmable but cost-effective for low- to mid-volume production. Its CMOS design draws microamp-level currents in sleep mode. Compared to PIC16F equivalents, this OTP variant suits designs where firmware is finalized and code protection is desired - once programmed, the code cannot be read back.
Typical applications include industrial control and instrumentation, automotive body electronics, sensor interface nodes, low-power remote sensor nodes, HVAC damper/valve controllers, and simple appliance controllers where the integrated EEPROM stores calibration constants or user settings.
When designing with this part, note the PDIP-18 package suits through-hole prototypes and legacy designs; for new designs consider the surface-mount PIC16F630-I/P or PIC16F676-I/P flash equivalents. The internal RC oscillator eliminates external components but trades absolute frequency accuracy. Verify Vdd rise time meets POR requirements at cold-start.
This page synthesizes current distributor pricing, drop-in Microchip alternatives from the same PIC16CE62X family, and practical design notes not consolidated on any single manufacturer page.
Drop-in alternatives for PIC16CE625-20E/P — 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 PIC16CE625-20E/P (same form factor and footprint) — differing in Instruction Cycle Time, Package, Timers, I/O Pins, Mounting Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE625-20I/P
✅ Drop-In✓ In Stock
$1.95 / Unit
View Datasheet →PIC16CE625-20/P
✅ Drop-In✓ In Stock
$4.6 / Unit
View Datasheet →PIC16CE625-20E/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE625T-20E/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE625-04E/P
✅ Drop-In✓ In Stock
$2.41 / Unit
View Datasheet →PIC16CE625-04I/SO
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC16CE625-20E/P Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit RISC (PIC Harvard) |
| Family | PIC16C (PIC16CE62X sub-family) |
| Program Memory Size | 3.5 KB (2K x 14) OTP EPROM |
| Data EEPROM | 128 bytes |
| RAM | 128 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Cycle Time | 200 ns (single-cycle) |
| Instruction Set Size | 35 single-word instructions |
| I/O Pins | 13 |
| Supply Voltage (Vdd) | 3.0 V to 5.5 V |
| Package | PDIP-18 (DIP-18, 0.300") |
| Mounting Type | Through-Hole |
| Temperature Grade | Extended Industrial (-40C to +125C) |
| Timers | TMR0 8-bit with 8-bit prescaler |
| Watchdog Timer | Yes (independent on-chip RC) |
| Brown-out Reset (BOR) | Yes |
| Power-on Reset (POR) | Yes |
| Internal Oscillator | 4 MHz RC (calibrated) |
PIC16CE625-20E/P Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O pin / analog input (PORTA bit 2) |
| Pin 2 | RA3 — Bidirectional I/O pin / analog input (PORTA bit 3) |
| Pin 3 | RA4 — Bidirectional I/O pin / T0CKI clock input (PORTA bit 4) |
| Pin 4 | RA5 — Bidirectional I/O pin (PORTA bit 5) |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O pin / interrupt-on-change (PORTB bit 0) |
| Pin 7 | RB1 — Bidirectional I/O pin / interrupt-on-change (PORTB bit 1) |
| Pin 8 | RB2 — Bidirectional I/O pin / interrupt-on-change (PORTB bit 2) |
| Pin 9 | RB3 — Bidirectional I/O pin / interrupt-on-change (PORTB bit 3) |
| Pin 10 | RB4 — Bidirectional I/O pin / interrupt-on-change (PORTB bit 4) |
| Pin 11 | RB5 — Bidirectional I/O pin / interrupt-on-change (PORTB bit 5) |
| Pin 12 | RB6 — Bidirectional I/O pin / interrupt-on-change (PORTB bit 6) |
| Pin 13 | RB7 — Bidirectional I/O pin / interrupt-on-change (PORTB bit 7) |
| Pin 14 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
| Pin 15 | OSC2 — Oscillator output / external clock output |
| Pin 16 | OSC1 — Oscillator input / external clock input |
| Pin 17 | RA0 — Bidirectional I/O pin / analog input (PORTA bit 0) |
| Pin 18 | RA1 — Bidirectional I/O pin / analog input (PORTA bit 1) |
Typical Applications
PIC16CE625-20E/P is suitable for 6 applications: Industrial Process Control and Instrumentation, Automotive Body Electronics, HVAC Damper and Valve Controllers, Sensor Interface and Data Acquisition Nodes, Low-Power Remote Sensor and Battery Nodes, Simple Appliance Controllers.
Industrial Process Control and Instrumentation
The PIC16CE625-20E/P fits industrial process control applications where its 128-byte on-chip EEPROM stores calibration constants, its 13 I/O pins drive relay coils and read sensor inputs, and its 20 MHz clock executes PID loops at 200 ns per instruction. Compared to a discrete logic solution, the integrated MCU reduces BOM and PCB area, while the extended -40C to +125C temperature grade handles factory-floor thermal stress. The Watchdog Timer with independent RC oscillator provides fault recovery for unattended installations. Typical use: a multi-channel thermocouple conditioner that linearizes sensor output, drives an LCD interface, and stores calibration in EEPROM. Engineers validate that the 3.5 KB OTP EPROM holds the linearization table and UI firmware without external memory.
Recommended
Automotive Body Electronics
The PIC16CE625-20E/P suits automotive body electronics modules such as seat controllers, mirror actuators, and lighting timers where the extended temperature grade (-40C to +125C) handles under-dash thermal extremes and the 128-byte EEPROM retains user preferences (seat position, mirror angle) across battery disconnects. The 13 I/O pins interface directly to 12V automotive rails via external MOSFET drivers. Designers must add CAN/LIN transceivers externally since the CE625 lacks hardware USART. Brown-out Reset prevents latch-up during cranking transients. Compared to PIC16F equivalents, the OTP EPROM variant offers code-protection suitable for production parts where field firmware updates are not required.
Recommended
HVAC Damper and Valve Controllers
The PIC16CE625-20E/P is well-matched to HVAC damper and valve controllers requiring a small 8-bit MCU with non-volatile parameter memory. Its 128-byte EEPROM stores setpoints, hysteresis values, and scheduling data that survive power cycles, while 13 I/O pins read thermistor inputs and drive triac outputs for AC line motor control. The 20 MHz clock (200 ns/instruction) provides responsive PID control loops for modulating damper position. The internal 4 MHz RC oscillator eliminates external clock components, reducing BOM cost in high-volume HVAC equipment. Engineers add zero-crossing detection externally to switch triacs at AC line zero for EMI reduction.
Recommended
Sensor Interface and Data Acquisition Nodes
The PIC16CE625-20E/P serves as the core of distributed sensor interface nodes where its 128-byte EEPROM stores node ID and calibration data, and its 13 I/O pins read multiple analog sensors via external multiplexer. The 20 MHz instruction rate supports background polling at 5 kHz per channel, with on-chip TMR0 providing accurate sample timing. Designers add an external ADC such as MCP3001 for higher resolution than the MCU's digital-only I/O. The -40C to +125C extended temperature range supports outdoor sensor installations. Compared to a discrete 555-timer solution, the integrated MCU provides programmability for protocol adaptation (Modbus, custom serial).
Recommended
Low-Power Remote Sensor and Battery Nodes
The PIC16CE625-20E/P's CMOS design and microamp sleep current make it suitable for battery-powered remote sensor nodes transmitting periodic readings. The 128-byte EEPROM retains logged samples and node identity across deep-sleep cycles; the Watchdog Timer wakes the MCU every few seconds to take a measurement and transmit via external radio. Brown-out Reset prevents data corruption as battery voltage drops. The internal 4 MHz RC oscillator eliminates external crystal cost. Compared to PIC16F flash siblings, the OTP EPROM version is lower cost but cannot be firmware-updated in the field - a trade-off acceptable for sealed, disposable sensor deployments.
Recommended
Simple Appliance Controllers
The PIC16CE625-20E/P drives simple household appliance controllers such as coffee makers, slow cookers, and washing machine timers, where its 3.5 KB OTP holds the timing/state-machine firmware and its 128-byte EEPROM stores user-set programs (brew strength, cook time, wash cycle). The 13 I/O pins read keypads, drive LED indicators, and switch triac-controlled heating elements or motors. The extended temperature grade handles appliance internal heat near motors and heaters. Engineers add zero-crossing SSR drivers externally for quiet AC switching. The OTP EPROM design provides code protection for production units where firmware is finalized.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE625-20E/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE625-20I/P | PIC16CE625-20/P | PIC16CE625-04E/P | PIC16CE625T-20E/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | PDIP-18 | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same | PDIP-18 - same |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 20 MHz |
| Program Memory | 3.5 KB OTP EPROM | 3.5 KB OTP EPROM | 3.5 KB OTP EPROM | 3.5 KB OTP EPROM | 3.5 KB OTP EPROM |
| Data EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| I/O Pins | 13 | 13 | 13 | 13 | 13 |
| Supply Voltage | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V | 3.0 V to 5.5 V |
| Temperature Grade | -40C to +125C (Extended Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +125C (Extended Industrial) | -40C to +125C (Extended Industrial) |
| Programming Type | OTP EPROM (one-time) | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
Key Differentiators
- Extended industrial temperature grade (-40C to +125C) (vs PIC16CE625-20I/P)
- Higher 20 MHz clock vs 4 MHz (vs PIC16CE625-04E/P)
- Larger 3.5 KB program memory vs 1.75 KB on Flash equivalent (vs PIC16F630-I/P)
Design Notes
The PIC16CE625-20E/P accepts Vdd from 3.0 V to 5.5 V. Decouple Vdd (pin 14) with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a bulk 10 uF electrolytic or tantalum at the MCU supply rail. Brown-out Reset (BOR) is enabled by configuration fuse and triggers at ~2.0-2.1 V to prevent code execution during voltage dips; verify your system's cold-start Vdd rise time meets the datasheet's POR requirements (typically <100 ms for valid reset). For battery-powered designs the MCU draws <1 uA in sleep mode with WDT disabled, but enabling the Watchdog Timer adds ~3-5 uA - factor this into life-cycle calculations.
Place the decoupling capacitor(s) on Vdd/VSS with the shortest possible loop area - within 5 mm of pins 5 and 14 - to suppress switching noise from the internal oscillator and I/O transitions. Route the OSC1/OSC2 traces (pins 15-16) symmetrically and short; if using an external crystal, place the load capacitors close to the MCU pins to minimize parasitic capacitance. The 18-pin PDIP package has generous pin spacing (2.54 mm) so trace routing between pins is straightforward - one signal per via gap is achievable. Keep analog and digital grounds connected at a single point (star ground) if using analog inputs on PORTA.
Three pitfalls to avoid: (1) Do not assume PIC16CE625 and PIC16F630 firmware is binary-compatible - although the instruction set is largely the same, the SFR addresses differ in several peripheral registers, so firmware must be recompiled when migrating between OTP and Flash. (2) OTP EPROM cannot be erased - a programming error means scrap; budget 2-3x prototype units for development, and use a PIC16F630-I/P development board to finalize firmware before committing to OTP. (3) The Watchdog Timer has its own independent RC oscillator (~18-25 kHz nominal, NOT the system clock), so WDT timeout is independent of system clock faults - configure WDT postscaler correctly for your application's fault-recovery time.
Compliance Information
Lead-free and RoHS compliance for PIC16CE625-20E/P were not explicitly stated in the verified web data; consult Microchip product page or datasheet for definitive compliance. AEC-Q100 is not applicable - the part carries 'extended industrial' temperature grade, not automotive Q100 qualification. Designers needing AEC-Q100 should evaluate PIC16F or PIC18 automotive-grade parts.
