PIC16CE625-04/SS - 4MHz 8-Bit OTP MCU 3.5KB | Microchip
MPN: PIC16CE625-04/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.95 | $1.95 |
| 10 | $1.78 | $17.80 |
| 100 | $1.62 | $162.00 |
| 500 | $1.47 | $735.00 |
| 1,000 | $1.35 | $1,350.00 |
PIC16CE625-04/SS Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip that integrates a CPU, memory, and peripherals into a single IC. Within the PICmicro family hierarchy, the PIC16CE625 belongs to the mid-range PIC16 sub-family, which sits between baseline PIC10/12/14 devices and high-performance PIC17/18 devices. As a member of the PICmicro family, it executes most instructions in a single 200 ns cycle (at 20 MHz) and supports 14-bit wide instruction words. Mid-range PIC16 MCUs are typically deployed in embedded-control applications that need deterministic timing, low power, and robust I/O at the lowest possible cost.
Key features include 35 single-cycle instructions (program branches are two-cycle), 8-bit timer/counter with 8-bit prescaler, 13 digital I/O pins capable of sinking up to 25 mA, internal pull-up resistors on PORTB, and 128 bytes of non-volatile EEPROM data memory that survives power cycles. The wide operating voltage range (3.0 V to 5.5 V) supports both 3.3 V and 5 V designs without level translation, and the CMOS design keeps quiescent current under 2 mA in active mode and below 1 uA in SLEEP.
Architecturally, the PIC16CE625 uses a Harvard-class modified RISC core with separate program and data buses. The 14-bit instruction width gives the device a more capable addressing model than baseline PIC parts while retaining code compatibility with the broader PIC16 mid-range toolchain (MPLAB IDE, MPASM assembler, PICkit programmers). The integrated 128-byte EEPROM is byte-erasable and is rated for >1M erase/write cycles, distinguishing the CE6xx family from the OTP-only C6xx parts.
Typical applications include consumer appliance control, sensor-interface modules, automotive interior subsystems (non-safety), low-cost security keypads, battery-powered instrumentation, and general-purpose logic-replacement designs. Its combination of OTP program memory, on-chip EEPROM data memory, and low pin count makes it a strong fit when recurring firmware updates are not required and BOM cost is critical.
When designing with the PIC16CE625-04/SS, ensure the oscillator configuration is selected correctly for the chosen clock source (XT, LP, RC, or HS) and that the MCLR pull-up is present in resistor-capacitor reset configurations. Because the program memory is OTP, code must be fully validated before final programming; for in-field updatable designs, choose the PIC16F or PIC16LF family with Flash memory instead.
This page combines manufacturer-verified specifications, current distributor pricing, and a parametric drop-in alternatives matrix curated specifically for the SSOP-20 footprint - information that is not consolidated in any single source document.
Drop-in alternatives for PIC16CE625-04/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 PIC16CE625-04/SS (same form factor and footprint) — differing in Package, Instruction Cycle Time, Timers, Core Architecture, Operating Temperature.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE625-04I/SS
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC16CE625-04E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624-04/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE624T-04E/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE623-04I/SS
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC16CE625-04/SS Maximum Ratings & Electrical Characteristics
| Program Memory Size | 3.5 KB (2K x 14) OTP |
| RAM Size | 128 bytes |
| EEPROM Size | 128 bytes |
| CPU Core | 8-bit PIC16 mid-range RISC |
| Instruction Word Width | 14 bit |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 1000 ns at 4 MHz |
| Supply Voltage Range | 3.0 V to 5.5 V |
| I/O Pins | 13 |
| Timers | 1 x 8-bit timer/counter with 8-bit prescaler |
| Package | SSOP-20 (5.30 mm body width, 0.65 mm pitch) |
| Mounting Type | Surface Mount |
| ROM Type | MROM (OTP) |
| Operating Temperature | 0C to +70C (commercial) |
| RoHS Status | Compliant |
| Lead-Free | Yes |
PIC16CE625-04/SS Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pin 3 | RA4/T0CKI — Bidirectional I/O port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR/VPP — Master Clear (reset) input / programming voltage |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Bidirectional I/O port B bit 0 / external interrupt |
| 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 |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7 |
| Pin 14 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 16 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 17 | RC0 — Bidirectional I/O port C bit 0 |
| Pin 18 | RC1 — Bidirectional I/O port C bit 1 |
| Pin 19 | RC2 — Bidirectional I/O port C bit 2 |
| Pin 20 | RC3 — Bidirectional I/O port C bit 3 |
Typical Applications
PIC16CE625-04/SS is suitable for 7 applications: Consumer Appliance Control, Battery-Powered Sensor Interface, Logic Replacement in Industrial Modules, Low-Cost Security Keypad Controller, Automotive Interior Subsystems (Non-Safety), Small Appliance LED Display Driver, Remote Control Transmitter MCU.
Consumer Appliance Control
The PIC16CE625-04/SS fits consumer appliance control boards where a small, deterministic 8-bit core replaces discrete logic or relays. Its 13 digital I/O pins drive indicator LEDs, triac optocouplers, and mechanical switches, while the 25 mA sink capability directly activates low-power solenoids without external drivers. The 4 MHz clock and 1000 ns instruction cycle execute a state-machine control loop in well under 1 ms, supporting closed-loop temperature regulation in coffee makers or washing-machine timers. The integrated 128 B EEPROM stores user preference settings (cycle selection, language, last-used mode) without an external serial EEPROM, reducing BOM cost by $0.10-0.20 per board. For appliance designers prioritizing BOM minimization over in-field firmware updates, the OTP PIC16CE625-04/SS provides the right balance of cost, capability, and long-term Microchip supply continuity.
Recommended
Battery-Powered Sensor Interface
The PIC16CE625-04/SS operates from 3.0 V to 5.5 V, making it compatible with both 3.3 V and 5 V battery systems including 2xAA alkaline, single-cell Li-ion, and CR2032-boosted supplies. The PIC16 mid-range CMOS core draws under 2 mA active and below 1 uA in SLEEP mode, enabling multi-year battery life in intermittent-duty sensors such as remote thermostats, door/window transmitters, or environmental loggers. The 13 I/O pins interface to SPI or I2C sensors, while the integrated 128 B EEPROM logs calibration coefficients and 8-bit timer/counter handles wake-up scheduling. Combined with the SSOP-20 small footprint, the PIC16CE625-04/SS is well-suited to compact sensor PCBs where every square millimeter counts and the design is shipped in high enough volume to amortize OTP programming.
Recommended
Logic Replacement in Industrial Modules
In industrial control modules where 5-15 discrete logic ICs previously implemented a glue-logic function, the PIC16CE625-04/SS consolidates that logic into a single 8-bit MCU. With 13 I/O pins and 3.5 KB of OTP program memory, it replaces dozens of 74HC-series gates while adding configurable behavior, faster time-to-market, and the ability to fix logic bugs in firmware before OTP programming. The commercial 0C to +70C operating range is sufficient for indoor industrial cabinets; for harsher environments, select the PIC16CE625-04I/SS or PIC16CE625-04E/SS drop-in variants. The 35 single-cycle instructions and Harvard bus architecture deliver deterministic response times under 1 us, suitable for encoder reading, PWM generation, and basic protocol conversion (UART-to-parallel, parallel-to-step/dir) in distributed I/O modules.
Recommended
Low-Cost Security Keypad Controller
The PIC16CE625-04/SS is well matched to security keypad controllers in access-control readers and alarm panels. Its 13 I/O pins scan a 4x4 matrix keypad (8 lines for rows/columns) while leaving 5 lines for LED indicators, buzzer drive, and lock relay control. The integrated 128 B EEPROM stores the user code table or access logs that survive power loss, eliminating external NVRAM. At 4 MHz, the debounce + scan loop completes in under 100 us, well below the 30 ms human-typing interval, ensuring no key presses are missed. For OEM security manufacturers shipping thousands of units annually, OTP programming locks in firmware to prevent cloning, while the SSOP-20 footprint and surface-mount compatibility streamline automated PCB assembly.
Recommended
Automotive Interior Subsystems (Non-Safety)
The PIC16CE625-04/SS handles non-safety automotive interior subsystems such as ambient lighting controllers, mirror-adjustment switches, seat-position memory, and HVAC blend-door actuators. While the standard '04/SS' is commercial temperature grade (0C to +70C), the PIC16CE625-04E/SS extended-temperature variant (-40C to +125C) is a drop-in replacement that meets cabin-temperature automotive requirements. The 13 I/O pins interface to multi-position switches, PWM LED drivers, and LIN-bus transceivers via bit-banged UART. The integrated 128 B EEPROM retains last-user settings (mirror position, seat preset, climate zone) across battery disconnects. For safety-critical automotive applications (airbag, ABS, steering), use AEC-Q100 qualified parts instead, but for interior convenience features the PIC16CE625 family offers proven Microchip automotive-grade supply continuity.
Recommended
Small Appliance LED Display Driver
The PIC16CE625-04/SS drives 7-segment LED displays and indicator LED arrays in small appliances such as microwave ovens, rice cookers, and air purifiers. Its 13 I/O pins multiplex a 4-digit 7-segment display (8 segment lines + 4 digit lines) while leaving one pin for a buzzer or status LED. The 35-instruction PIC16 mid-range core and 4 MHz clock deliver 1000 ns cycle times, easily refreshing a multiplexed display at 100 Hz with no perceived flicker. The integrated 128 B EEPROM stores cooking profiles or user-configured fan speeds, while the 3.0 V to 5.5 V supply range accepts rectified mains or a 5 V regulator output. Designers appreciate that the SSOP-20 footprint is hand-solderable for prototypes and reflow-compatible for production assembly.
Recommended
Remote Control Transmitter MCU
The PIC16CE625-04/SS is an excellent fit for handheld remote control transmitters (TV, audio, garage door, toy) where BOM cost and battery life dominate the design. Its 3.0 V to 5.5 V supply operates from two AAA cells, while the sub-1 uA SLEEP current enables multi-year standby on alkaline batteries. The 13 I/O pins scan a 5x4 button matrix (9 lines) with 4 spare lines for LED indicators, IR transmitter drive, or RF module chip-select. The 128 B EEPROM stores paired-device addresses or user preferences, and the 35-instruction PIC16 core handles bit-banged IR protocols (RC5, NEC, SIRC) with deterministic timing. For cost-sensitive consumer remotes shipped in millions of units annually, OTP programming locks firmware and prevents cloning while minimizing per-unit silicon cost.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE625-04/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE625-04I/SS | PIC16CE625-04E/SS | PIC16CE624-04/SS | PIC16CE624T-04E/SS | PIC16CE623-04I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same |
| Program Memory | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP | 3.5 KB OTP |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 64 bytes (-50%) |
| ADC | Yes (8-bit) | Yes (8-bit) | Yes (8-bit) | No | No | No |
| Maximum Clock | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Operating Temperature | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +125C (extended) | 0C to +70C (commercial) | -40C to +125C (extended) | -40C to +85C (industrial) |
| 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 |
Key Differentiators
- Integrated 128-byte byte-erasable EEPROM (vs PIC16C62x family)
- SSOP-20 footprint with industrial and extended temperature variants (vs PIC16CE625-04/P (PDIP-18 package))
- Single-cycle 35-instruction PIC16 mid-range core (vs Baseline PIC10/12/14 family)
Design Notes
Estimated: at VDD = 5 V and active mode 4 MHz, the PIC16CE625-04/SS draws approximately 2 mA. Add a 0.1 uF ceramic decoupling capacitor as close to the VDD pin (pin 14) as possible, with a 10 uF bulk tantalum or aluminum polymer cap on the supply rail for transient suppression. Place the decoupling cap within 3 mm of the VDD pin to minimize parasitic inductance that could cause voltage dips during SLEEP-to-active transitions. For battery-powered designs, gate the supply with a P-MOSFET high-side switch controlled by an I/O pin to achieve <1 uA quiescent current in shelf mode.
The PIC16CE625-04/SS uses one-time programmable (OTP) memory - firmware cannot be erased or rewritten after programming. Validate all firmware on a Flash-equivalent PIC16F630 or PIC16F676 debug build before committing to OTP programming. The configuration word must be set correctly for the chosen oscillator mode (XT, HS, LP, or RC); an incorrect configuration can prevent the oscillator from starting. The MCLR pin (pin 4) requires a 10 kohm pull-up to VDD for normal operation; leaving MCLR floating causes intermittent resets.
Route the OSC1/OSC2 traces (pins 16/15) as short and symmetric as possible, keeping them away from high-current switching traces and shielded by a ground pour on both sides. For crystal mode, place the two 22 pF loading capacitors within 3 mm of the OSC pins and connect them to a clean ground island. Keep the SSOP-20 thermal pad (if present in the package variant) soldered to a moderate copper pour to improve thermal dissipation; otherwise, the standard SSOP-20 lead frame is sufficient for the <100 mW typical dissipation.
Group PORTB pins (6-13) toward a connector or keypad matrix on one edge of the PCB to minimize trace crossings and keep signal paths short. If using the I2C or SPI bit-banged interface, allocate SDA/SCL or SCK/SDI on adjacent PORTB pins to simplify ISR latency calculations. Add a 100 kohm pull-up on MCLR (pin 4) and ensure the reset trace does not run parallel to switching signals for more than 5 mm to avoid injected noise. Maintain at least 0.2 mm clearance between the SSOP-20 leads and any adjacent high-voltage traces per IPC-2221.
Compliance Information
RoHS compliant per Microchip product page. AEC-Q100 not qualified at the base part number; automotive interior applications should select PIC16CE625-04E/SS for extended temperature grade but still require separate AEC-Q100 qualification if safety-critical. Halogen-free status not explicitly stated in available web data.
