PIC16CE625-04E/P - 8-bit OTP MCU 3.5KB | Microchip
MPN: PIC16CE625-04E/P β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.45 | $34.50 |
| 100 | $3.05 | $305.00 |
| 500 | $2.72 | $1,360.00 |
| 1,000 | $2.41 | $2,410.00 |
PIC16CE625-04E/P Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, working RAM, and peripherals onto one die. The PIC16C/PIC16CE family belongs to the broader hierarchy: 8-bit microcontroller -> RISC microcontroller -> embedded controller -> semiconductor IC. MCUs are the computational core of nearly every embedded product, and the PIC16CE62X sub-family specifically targets cost-sensitive applications that need a small OTP code footprint plus on-chip EEPROM for parameter storage.
Key features of the PIC16CE625-04E/P include 128 bytes of data RAM, 13 general-purpose digital I/O pins, a maximum clock speed of 4 MHz (200 ns instruction cycle), an enhanced 8-bit timer/counter (Timer0/Timer1), an analog comparator with two inputs, internal/external interrupt sources, and a Watchdog Timer (WDT) for safe recovery from firmware faults. Power management is handled by Brown-out Detect/Reset (BOD), Power-On Reset (POR), and a programmable code-protection bit, all critical for unattended industrial or appliance designs.
Technically, the device executes 35 single-word instructions at 200 ns per instruction (except program branches, which take two cycles). The OTP program memory is organized as 2K x 14 bits (3.5KB), suitable for compact state machines and sensor interface firmware. The integrated EEPROM data memory provides non-volatile parameter storage, eliminating external EEPROM chips in many designs. Operating voltage spans 3.0 V to 5.5 V, making the part compatible with both 3.3 V and 5 V logic rails.
Typical applications include white-goods and appliance control boards, security-system keypads and sensors, low-end remote controls, automotive interior sub-modules (under-the-dash comfort modules, lighting controllers), and industrial counter/timer boards. The PIC16CE625-04E/P is also widely used as a drop-in upgrade for legacy PIC16C620/621 designs where EEPROM storage and the analog comparator are required.
When designing with this part, allocate one I/O line for the MCLR/VPP reset function and ensure the 4 MHz oscillator is paired with the recommended 22 pF ceramic or 33 pF crystal load capacitors; deviations beyond 20% will degrade frequency stability at temperature extremes.
This page synthesizes current distributor pricing, drop-in same-package alternatives from both Microchip and competitor brands, and practical design notes that go beyond the manufacturer datasheet to support procurement and design engineers.
Drop-in alternatives for PIC16CE625-04E/P 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 PIC16CE625-04E/P (same form factor and footprint) β differing in Core Architecture, I/O Pins, Instruction Set, Mounting Type, Package.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16CE625-04I/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE625-04/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE625-20/P
β Drop-Inβ In Stock
$4.6 / Unit
View Datasheet βPIC16CE625-04E/SO
β Drop-Inβ In Stock
$5.1 / Unit
View Datasheet βPIC16CE624-04/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE623-04/P
β Drop-Inπ Reference alternative (not in catalog)
PIC16CE625-04E/P Maximum Ratings & Electrical Characteristics
| Product Type | 8-bit RISC Microcontroller (MCU) |
| Series | PIC16C (PIC16CE62X sub-family) |
| Core Architecture | PIC16C, 14-bit instruction word, Harvard |
| Program Memory | 3.5 KB (2K x 14) OTP |
| Data Memory (RAM) | 128 bytes |
| EEPROM Data Memory | Integrated on-die |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle Time | 200 ns (single-cycle, 4 MHz clock) |
| Instruction Set | 35 single-word instructions |
| Supply Voltage (VDD) | 3.0 V to 5.5 V |
| I/O Pins | 13 (general-purpose, bidirectional) |
| Timers | Timer0 (8-bit), Timer1 (16-bit with capture/compare/PWM) |
| Analog Peripherals | 1 on-chip analog comparator (2 inputs) |
| Reset & Supervision | Power-On Reset (POR), Brown-out Detect/Reset (BOD), MCLR |
| Watchdog Timer (WDT) | Yes, software-enabled |
| Interrupts | Internal + external sources |
| Package | 18-pin PDIP (0.300 inch, 7.62 mm) through-hole |
| Mounting Type | Through-Hole (THT) |
| Lead-Free / RoHS | Compliant per Microchip product page |
PIC16CE625-04E/P Pin Configuration
| Pin 1 | MCLR/VPP β Master Clear (reset) input / programming voltage input |
| Pin 2 | RA0/AN0 β PORTA bit 0 / analog comparator input |
| Pin 3 | RA1/AN1 β PORTA bit 1 / analog comparator input |
| Pin 4 | RA2/AN2/VREF β PORTA bit 2 / analog comparator output / voltage reference |
| Pin 5 | RA3/AN3/C1OUT β PORTA bit 3 / comparator 1 output |
| Pin 6 | RA4/T0CKI β PORTA bit 4 / Timer0 clock input |
| Pin 7 | RA5/SS/AN4 β PORTA bit 5 / SPI slave select / analog input |
| Pin 8 | OSC1/CLKIN β Oscillator crystal input / external clock input |
| Pin 9 | OSC2/CLKOUT β Oscillator crystal output / clock output |
| Pin 10 | VSS β Ground reference |
| Pin 11 | VDD β Positive supply voltage (3.0 V to 5.5 V) |
| Pin 12 | RB0/INT β PORTB bit 0 / external interrupt input |
| Pin 13 | RB1 β PORTB bit 1 |
| Pin 14 | RB2 β PORTB bit 2 |
| Pin 15 | RB3/PGM β PORTB bit 3 / low-voltage programming input |
| Pin 16 | RB4 β PORTB bit 4 |
| Pin 17 | RB5 β PORTB bit 5 |
| Pin 18 | RB6/PGC β PORTB bit 6 / ICSP clock |
Typical Applications
PIC16CE625-04E/P is suitable for 6 applications: White-Goods and Appliance Control, Security System Keypads and Sensor Hubs, Remote Control and IR Transmitter Boards, Automotive Interior Sub-Modules, Industrial Counter and Timer Modules, HVAC Thermostat Control Boards.
White-Goods and Appliance Control
The PIC16CE625-04E/P's 3.5 KB OTP program memory, on-chip EEPROM data memory, and 13 GPIO pins are well-matched to washing machines, dishwashers, and microwave oven controller boards. The integrated EEPROM eliminates external 24C-series EEPROM ICs for parameter storage (wash cycles, error logs, user preferences), reducing BOM cost by $0.15-0.40 per board. The 4 MHz clock and 35-instruction RISC core execute appliance state machines in <1 ms loop time, while the Watchdog Timer and Brown-out Reset protect against firmware lockup during brown-out events common with inductive motor loads. The extended -40C to +125C temperature grade survives under-the-dash or inside-cabinet thermal stress.
Recommended
Security System Keypads and Sensor Hubs
In PIR motion sensors, glass-break detectors, and keypad entry modules, the PIC16CE625-04E/P runs the detection algorithm, drives LED indicators, and supervises battery voltage via its analog comparator. The 13 GPIO lines easily accommodate the PIR output, alarm relay driver, status LEDs, and a 4x4 keypad matrix scan. Brown-out Detect ensures a clean shutdown on low battery, while the integrated EEPROM stores zone configuration and tamper flags through power cycles. The 3.0-5.5 V supply range matches 3.6 V lithium battery packs and 5 V regulated supplies alike, simplifying the analog front-end design.
Recommended
Remote Control and IR Transmitter Boards
Universal TV, set-top box, and HVAC remote controls benefit from the PIC16CE625-04E/P's low pin count, 4 MHz operation, and integrated EEPROM for storing paired device codes. The 35-instruction RISC core executes NEC/RC5/RC6 IR protocols in real time with cycle-accurate timing, while the 128-byte RAM holds the current transmission buffer and key-debounce state. The 13 GPIO pins drive a 7x5 key matrix plus status LEDs without an external I/O expander. Operating from 2xAA batteries (3.0 V) up to USB-powered 5 V, this part matches the typical remote-control supply window.
Recommended
Automotive Interior Sub-Modules
The PIC16CE625-04E/P's 'E' (extended) temperature grade and -40C to +125C operating range suit interior automotive modules such as seat-position memories, mirror controllers, and ambient lighting nodes. The integrated EEPROM retains seat/mirror positions through battery disconnect, and the analog comparator monitors the load-current shunt for short-circuit protection. The 13 GPIO interface to LIN (Local Interconnect Network) transceiver ICs and PWM-driven LED strings, while the WDT recovers the MCU from automotive load-dump transients. AEC-Q100 screening is not formally part of this part, but the temperature and ESD margins meet many OEM non-safety sub-system requirements.
Recommended
Industrial Counter and Timer Modules
Production-line counters, pump-cycle timers, and process-event loggers deploy the PIC16CE625-04E/P to count pulses from optical encoders or flow meters and store elapsed-time totals in EEPROM. The 16-bit Timer1 module with capture input pins handles quadrature decoding or frequency measurement up to 4 MHz, while the on-chip comparator provides zero-crossing detection for 50/60 Hz line-frequency monitoring. The 13 GPIO pins drive 7-segment displays via external shift registers or directly multiplex 4-digit LED readouts. The 3.0-5.5 V supply rails accommodate 24 V industrial bus systems with simple linear regulation.
Recommended
HVAC Thermostat Control Boards
Thermostat and HVAC zone controller boards use the PIC16CE625-04E/P for temperature polling, schedule storage, and relay switching of fan/heat/cool stages. The on-chip EEPROM stores user-setpoint schedules and installer configuration across power cycles, while the analog comparator interfaces directly to 10K NTC thermistor divider networks for low-cost temperature sensing. Brown-out Detect ensures graceful restart after brief power interruptions common with HVAC contactor switching, and 13 GPIO drive the LCD segments, pushbuttons, and relay coils without an external I/O expander.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE625-04E/P β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE625-04I/P | PIC16CE625-04/P | PIC16CE625-20/P | PIC16CE624-04/P | PIC16CE623-04/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-PDIP (0.300 in) | 18-PDIP (0.300 in) - same | 18-PDIP (0.300 in) - same | 18-PDIP (0.300 in) - same | 18-PDIP (0.300 in) - same | 18-PDIP (0.300 in) - same |
| Program Memory | 3.5 KB OTP (2K x 14) | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 875 B OTP | 512 B OTP |
| EEPROM Data Memory | 128 bytes on-chip | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| Temperature Grade | Extended -40C to +125C (E) | Industrial -40C to +85C | Commercial 0C to +70C | Commercial 0C to +70C | Commercial 0C to +70C | Commercial 0C to +70C |
| GPIO Count | 13 | 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 | 3.0 V to 5.5 V |
| Approx. Unit Price (qty 1) | $3.85 | $3.65 | $2.95 | $3.20 | $2.40 | $2.10 |
Key Differentiators
- Integrated EEPROM data memory eliminates external EEPROM IC (vs PIC16C711-04/P)
- Extended automotive temperature grade (-40C to +125C) (vs PIC16CE625-04/P (commercial grade))
- 4 MHz speed grade optimized for low-EMI cost-sensitive designs (vs PIC16CE625-20/P (20 MHz grade))
- Larger 3.5 KB OTP memory within the PIC16CE62X sub-family (vs PIC16CE624-04/P (875 B) and PIC16CE623-04/P (512 B))
Design Notes
Place a 0.1 uF ceramic decoupling capacitor as close as physically possible to the VDD pin (pin 11) and a bulk 10 uF tantalum or aluminum polymer capacitor on the same node. The PIC16CE62X family draws brief inrush currents up to 30 mA during EEPROM write cycles; a poorly decoupled supply can trigger brown-out resets. Add a 10 kohm pull-up on the MCLR/VPP pin (pin 1) to ensure clean reset behavior during power-up ramps. Series-inject a small ferrite bead if the supply is shared with relay coils or motor drivers to suppress inductive transients reaching the MCU.
Route the crystal traces (OSC1/OSC2, pins 8/9) as short, symmetrical loops with a grounded guard trace on each side. Keep the crystal within 10 mm of the MCU package, and avoid routing high-current or high-frequency digital signals (PWM, relay drive) parallel to or under the crystal traces. The 18-pin PDIP through-hole footprint gives excellent mechanical stability but expect ~2.5 mm lead length - plan for through-hole pad spacing of 2.54 mm (0.100 inch) on the PCB. Keep analog comparator inputs (RA0-RA2) routed away from switching nodes to avoid coupling into the comparator threshold.
Do not exceed the 4 MHz clock input on this -04 speed grade - the part is specified for 4 MHz maximum at the extended temperature range, and pushing to 8 MHz will produce unreliable EEPROM writes and may corrupt program counter state. Always disable the Watchdog Timer (WDTE config bit cleared) when developing on the PIC16CE625-04E/P, otherwise unexpected resets every ~18 ms (typical WDT period) will frustrate debug sessions. Finally, EEPROM endurance erases is rated at 100K write cycles minimum; if your application stores data continuously (e.g., event counters), either wear-level across multiple bytes or move state to external FRAM.
Assign a dedicated ground pour under the MCU and stitch it with vias on a 5-10 mm grid for thermal and electrical return paths. The through-hole PDIP dissipates only modest power (typically <100 mW active), so a 1 oz copper pour is sufficient. If using ICSP (In-Circuit Serial Programming), reserve the RB6/PGC and RB7/PGD pins in your layout and provide a 6-pin header (or 0.1 inch test points) accessible without removing the PCB from the enclosure. Mark pin 1 with a silkscreen dot or chamfered corner to prevent backward insertion during production.
Compliance Information
RoHS and REACH compliant per Microchip product page. AEC-Q100 not formally qualified; however, the 'E' temperature grade (extended -40C to +125C) is automotive-style. For formally AEC-Q100-qualified Microchip MCUs in similar pin counts, see PIC16F1936-I/P or PIC16F18855-I/P.
