PIC16CE624-04/SS - 4MHz 8-bit OTP MCU, 1.75KB | Microchip
MPN: PIC16CE624-04/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.95 | $3.95 |
| 10 | $3.56 | $35.60 |
| 100 | $3.18 | $318.00 |
| 500 | $2.85 | $1,425.00 |
| 1,000 | $2.55 | $2,550.00 |
PIC16CE624-04/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory (here OTP ROM), data memory, and peripheral I/O on a single silicon die. The PIC16CE624 belongs to the PIC16C mid-range family, sitting in the broader hierarchy: PIC16C mid-range MCU -> PIC® architecture -> 8-bit microcontroller -> embedded microcontroller -> semiconductor. The 'CE' suffix indicates CMOS with on-chip EEPROM data memory, which is uncommon in this generation and useful for storing calibration constants, configuration data, and serial numbers without external storage. The '624' core has 35 single-word instructions, making it one of the easiest microcontroller families to learn and program in assembly or C.
Key features of the PIC16CE624-04/SS include 13 bidirectional I/O pins (port A: 5, port B: 8) with individually programmable weak pull-ups, two on-chip analog comparators with programmable reference, a watchdog timer with its own on-chip RC oscillator for reliable operation, an 8-bit timer/counter (TMR0), and power-on reset / brown-out reset circuitry. The 128-byte EEPROM is rated for 1 million erase/write cycles typical, with data retention exceeding 40 years, which is far more durable than typical Flash-based EEPROM emulation schemes on later PIC16 devices.
The PIC16CE624 uses a Harvard architecture with a 14-bit instruction word and separate 8-bit data bus. Its RISC core executes most instructions in a single instruction cycle (4 clock periods), giving effective throughput of 5 MIPS at 20 MHz. Power management features include the SLEEP mode with wake-up on I/O change or watchdog timer overflow, and a low-power RC oscillator option for battery-sensitive designs.
Typical applications include appliance control (washing machines, microwave ovens, coffee makers), automotive body electronics (seat controllers, mirror adjusters), industrial sensor interfaces, security and access control panels, and consumer remote controls. The on-chip comparators make it well suited to low-cost analog signal conditioning without external op-amps.
When designing with this part, ensure the ICSP programming pins (RB6, RB7) are reserved on the PCB layout even if not used for debugging, since the OTP memory cannot be re-programmed. The EEPROM endurance and 4 MHz speed are the primary trade-offs against PIC16F-series Flash replacements; choose the F-series only if you need in-system reprogrammability.
This page synthesizes Mouser and Octopart distributor pricing, Microchip PIC16CE624 family datasheet specifications, and drop-in same-package alternatives (notably the PIC16CE624-04I/SS industrial-temperature variant) that engineers can source today without redesigning the PCB footprint.
Drop-in alternatives for PIC16CE624-04/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 PIC16CE624-04/SS (same form factor and footprint) — differing in Package, Core Architecture, Instruction Cycle Time, Program Memory Size, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE624-04I/SS
✅ Drop-In✓ In Stock
$1.49 / Unit
View Datasheet →PIC16CE624-04E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE623T-04E/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE623-04I/SS
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC16F648A-I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624-20/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624-04/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C mid-range 8-bit RISC |
| Instruction Set Size | 35 single-word instructions |
| Program Memory (ROM) | 1.75 KB (1K x 14) OTP |
| Data EEPROM | 128 bytes |
| RAM | 96 bytes |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns (single-cycle) |
| Supply Voltage (Vdd) | 3 V to 5.5 V |
| I/O Pins | 13 (Port A: 5, Port B: 8) |
| On-chip Comparators | 2 with programmable voltage reference |
| Timers | 1 x 8-bit (TMR0) + Watchdog Timer |
| Reset Sources | POR, BOR, MCLR, WDT |
| Operating Temperature | 0 C to +70 C (Commercial) |
| Package | 20-pin SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount (Gull-wing) |
| ROM Type | OTP (One-Time Programmable) |
| ICSP Programming Pins | RB6 (clock), RB7 (data) |
| RoHS Status | Compliant |
PIC16CE624-04/SS Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O, Port A bit 2; analog comparator input |
| Pin 2 | RA3 — Bidirectional I/O, Port A bit 3; analog comparator input |
| Pin 3 | RA4/T0CKI — Bidirectional I/O, Port A bit 4; TMR0 clock input (open-drain) |
| 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; interrupt-on-change |
| Pin 11 | RB5 — Bidirectional I/O, Port B bit 5; interrupt-on-change |
| Pin 12 | RB6/PGC — Bidirectional I/O, Port B bit 6; ICSP clock |
| Pin 13 | RB7/PGD — Bidirectional I/O, Port B bit 7; ICSP data |
| Pin 14 | VDD — Positive supply (3 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT — Crystal/Resonator output or clock out |
| Pin 16 | OSC1/CLKIN — Crystal/Resonator input or external clock |
| Pin 17 | RA0 — Bidirectional I/O, Port A bit 0; analog comparator input |
| Pin 18 | RA1 — Bidirectional I/O, Port A bit 1; analog comparator input |
| Pin 19 | RA5/SS — Bidirectional I/O, Port A bit 5; Master Synchronous Serial Port slave select |
| Pin 20 | VSS — Ground reference (duplicate for noise immunity) |
Typical Applications
PIC16CE624-04/SS is suitable for 6 applications: Appliance Control (Washing Machines, Microwaves), Automotive Body Electronics (Seat and Mirror Controllers), Security and Access Control Panels, Industrial Sensor Interfaces, Consumer Remote Controls and IR Emitters, Smart Home Sensor Hubs.
Appliance Control (Washing Machines, Microwaves)
The PIC16CE624-04/SS fits household appliance main controllers thanks to its 13 I/O pins sufficient for button matrices, relay drivers, and LED indicators, plus 1.75 KB OTP for fixed motor-control firmware. The 3 V to 5.5 V supply matches common appliance power rails derived from rectified mains, while the two on-chip comparators enable zero-crossing detection and sensor interfacing without external op-amps. The 128-byte on-chip EEPROM stores user preferences such as wash cycle selection across power cycles, surviving brownouts without external NVRAM. At 4 MHz, the 1 MIPS throughput is ample for typical sensor sampling, relay timing, and discrete PID control loops in appliances that update at a few hundred Hz.
Recommended
Automotive Body Electronics (Seat and Mirror Controllers)
The PIC16CE624-04/SS drives automotive seat position, mirror adjust, and interior lighting modules where cost dominates over temperature extremes. Its 13 I/O pins multiplex buttons, motor direction relays, and position-sensor inputs, while the two on-chip comparators with programmable reference read Hall sensors without external analog components. The 128-byte EEPROM retains trim and end-of-travel settings across battery disconnects. Although commercial-temperature rated (0 C to +70 C), it is widely used in cabin modules where ambient stays within that envelope; for under-hood duty, Microchip recommends the PIC16F648A-I/SS industrial successor. The 4 MHz clock is sufficient for brushed DC motor PWM at 10 kHz with 8-bit resolution.
Recommended
Security and Access Control Panels
The PIC16CE624-04/SS suits alarm keypads, door access controllers, and PIR motion-detector panels that require non-volatile credential storage and low quiescent current. Its 128-byte on-chip EEPROM stores up to 50 user PINs or RFID tag IDs without external serial EEPROM, reducing BOM cost. The 13 I/O scan a 4x4 keypad matrix directly with software debouncing, and the built-in watchdog timer with dedicated RC oscillator guarantees the panel recovers from firmware lockup within milliseconds. The SLEEP mode with wake-on-I/O-change drops current to microamp levels for battery-backed wireless PIR sensors. OTP security prevents reverse engineering of access-control algorithms, a feature valued in physical-security deployments.
Recommended
Industrial Sensor Interfaces
The PIC16CE624-04/SS conditions signals from low-cost industrial sensors such as thermocouples, photodiodes, and thermistor bridges. Its two on-chip comparators with programmable voltage reference create a window-discriminator output without external op-amps, while 13 I/O pins drive 7-segment displays or shift-register-based LEDs. The 1.75 KB OTP handles linearization tables and Modbus RTU framing at 9600 baud without strain. EEPROM retention stores calibration coefficients per channel, eliminating per-unit manual trimming. Industrial users select the PIC16CE624-04I/SS variant for the -40 C to +85 C range while keeping the same PCB footprint, simplifying qualification across commercial and factory-floor SKUs.
Recommended
Consumer Remote Controls and IR Emitters
The PIC16CE624-04/SS powers universal remote controls, ceiling-fan controllers, and AC line-of-sight IR emitters where low cost and battery life outweigh performance. Its 13 I/O drive a keypad matrix and IR LED through a transistor, while the 128-byte EEPROM stores learned IR codes and device profiles that survive battery swaps. The SLEEP mode draws under 1 uA, enabling multi-year battery life on two AA cells. The 4 MHz clock generates accurate 38 kHz / 40 kHz carrier frequencies for NEC, RC5, and SIRC IR protocols without external timers. Program memory (1.75 KB) holds multiple protocol decoders plus user-interface state machines.
Recommended
Smart Home Sensor Hubs
The PIC16CE624-04/SS anchors cost-optimized smart-home sensor hubs that aggregate temperature, humidity, and contact-switch data over Zigbee or sub-GHz radios. Its 13 I/O bits handle I2C sensors and a UART link to a wireless module such as the XBee or LoRa transceiver. The 128-byte EEPROM retains network credentials and last-known state across power cycles, avoiding re-pairing after brownouts. The two comparators detect low-battery thresholds without an ADC, and the 4 MHz core executes sensor-polling loops at 10 ms intervals with room to spare. For battery-powered nodes, the industrial-temperature PIC16CE624-04I/SS variant is pin-compatible.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624-04/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624-04I/SS | PIC16CE624-04E/SS | PIC16CE623T-04E/SS | PIC16CE623-04I/SS | PIC16F648A-I/SS | PIC16CE624-20/SS |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | SSOP-20 (5.30 mm) | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same | SSOP-20 - same |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 0.875 KB OTP | 0.875 KB OTP | 7 KB Flash | 1.75 KB OTP |
| RAM | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 256 bytes | 96 bytes |
| EEPROM Data Memory | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 256 bytes | 128 bytes |
| Max Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 20 MHz |
| Operating Temperature | 0 C to +70 C | -40 C to +85 C | -40 C to +125 C | -40 C to +125 C | -40 C to +85 C | -40 C to +85 C | 0 C to +70 C |
| Program Memory Type | OTP | OTP | OTP | OTP | OTP | Flash (reprogrammable) | OTP |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 16 | 13 |
Key Differentiators
- 128-byte on-chip EEPROM with 1M-cycle endurance (vs PIC16F648A-I/SS)
- Industrial temperature option in same SSOP-20 footprint (vs PIC16CE624-04I/SS)
- Two analog comparators with programmable Vref eliminate external op-amps (vs PIC16F88-I/SS)
- OTP memory for anti-reverse-engineering (vs PIC16F648A-I/SS)
- 35-instruction RISC core is easiest mid-range PIC to learn (vs PIC16F877A-I/P)
Design Notes
The PIC16CE624-04/SS uses OTP (one-time programmable) memory, so firmware bugs become permanent after programming. Always prototype on a Flash-based sibling such as PIC16F648A-I/SS (same SSOP-20 pinout) and validate firmware before committing to OTP parts. Also reserve RB6 (PGC) and RB7 (PGD) on the PCB even if your application does not use them, since they double as the ICSP programming interface and must be accessible to the production programmer.
Decouple Vdd (pin 14) with a 100 nF ceramic capacitor placed within 5 mm of the pin, plus a 10 uF bulk tantalum or aluminum if the supply is shared with motors or relays. The PIC16CE624-04/SS contains an internal brown-out reset (BOR) and power-on reset (POR); configure the BOR voltage via the configuration word to match your supply rail and avoid unwanted resets during motor inrush events on the same 5 V rail.
For the SSOP-20 package, route the crystal traces (OSC1/OSC2) on the top layer only and keep them short and symmetrical, with a guard ground plane beneath. Place the crystal within 5 mm of the MCU and surround it with a ground ring to reduce EMI. Avoid routing the ICSP signals (RB6/RB7) near high-frequency switching nodes such as relay coils, since they share the Port B structure and noise coupling can disturb in-circuit programming.
The PIC16CE624-04/SS in SSOP-20 typically dissipates under 50 mW even at 4 MHz full I/O switching, so no heatsink is required. However, in sealed appliance enclosures at 70 C ambient, derate I/O sourcing current to 10 mA per pin (20 mA absolute max per pin, 100 mA per port). Spread high-current loads across both ports and use external transistors for loads exceeding 25 mA per pin.
Compliance Information
SSOP-20 package is RoHS compliant per Microchip product page. Not AEC-Q100 qualified; choose PIC16F648A-I/SS or PIC16F88-I/SS for automotive applications. Halogen-free status not explicitly stated in available data.
