PIC16CE624T-04I/SS - 4MHz 8-Bit OTP MCU, 1.75KB | Microchip
MPN: PIC16CE624T-04I/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.5 | $4.50 |
| 10 | $4.05 | $40.50 |
| 100 | $3.55 | $355.00 |
| 500 | $3.2 | $1,600.00 |
| 1,000 | $2.85 | $2,850.00 |
PIC16CE624T-04I/SS Overview
What is an OTP microcontroller? An OTP (One-Time Programmable) microcontroller contains non-volatile program memory that can be written exactly once during production or development, after which the bit cells are physically altered and cannot be erased. OTP MCUs offer lower per-unit cost than flash or EEPROM-based equivalents while retaining the same instruction set, making them the preferred choice for high-volume, code-stable embedded products such as consumer appliances and industrial controllers.
Key features include two on-chip analog comparators with a programmable voltage reference, brown-out detect (BOD), power-on reset (POR), and a watchdog timer (WDT) for field reliability. The 35 single-word RISC instruction set, 8-level hardware stack, and 133 ns instruction execution time (at 4 MHz) simplify firmware development while the PIC16C5X/PIC12CXXX upward compatibility streamlines migration from older Microchip designs.
The device uses a Harvard bus architecture with separate program and data paths, 14-bit wide instruction words, and DC-20 MHz oscillator options. The internal comparator module supports slope-compensation and brown-out generation without external analog components, reducing BOM cost. Industrial temperature grade (-40 C to +85 C) and low-power CMOS construction suit battery-backed and always-on applications.
Typical applications include appliance control boards, sensor interface modules, low-cost motor control, white-goods user-interface panels, and industrial sensor signal conditioning where deterministic 8-bit performance and small form factor are required.
When designing with this device, ensure the MCLR pin is pulled high through a 10 kohm resistor and that VDD decoupling uses a 0.1 uF ceramic capacitor placed within 5 mm of the supply pin to suppress digital switching noise on the analog comparator reference.
This page consolidates distributor inventory, drop-in SSOP-compatible alternatives, and practical design notes beyond the manufacturer datasheet.
Drop-in alternatives for PIC16CE624T-04I/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 PIC16CE624T-04I/SS (same form factor and footprint) — differing in Package, Core Architecture, Program Memory Size, Mounting Type, Instruction Cycle Time.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE624-04I/SS
✅ Drop-In✓ In Stock
$1.49 / Unit
View Datasheet →PIC16CE624T-04E/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE623T-04I/SS
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC16CE624-04/SS
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16CE624T-04I/SS
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC16CE624T-04I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC (Harvard) |
| Core Size | 8-Bit |
| Series | PIC 16C |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 200 ns at 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM Size | 96 x 8 bytes |
| EEPROM Data Memory | 128 bytes |
| Number of I/O Pins | 13 |
| Supply Voltage (VDD) | 3.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) |
| Package | 20-pin SSOP (0.209 inch / 5.30 mm body width) |
| Mounting Type | Surface Mount (Tape & Reel) |
| Peripherals | Brown-out Detect/Reset, POR, WDT |
| On-chip Analog Modules | 2 Comparators, Programmable Voltage Reference |
| Connectivity | None dedicated (general-purpose I/O) |
| Instruction Set | 35 single-word instructions |
| Stack Depth | 8-level hardware |
PIC16CE624T-04I/SS Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear (Reset) input / Programming voltage |
| Pin 2 | OSC1/CLKIN — Oscillator crystal input or external clock |
| Pin 3 | OSC2/CLKOUT — Oscillator crystal output / clock out |
| Pin 4 | RA0/AN0 — Digital I/O / analog comparator channel 0 |
| Pin 5 | RA1/AN1 — Digital I/O / analog comparator channel 1 |
| Pin 6 | RA2/AN2/VREF — Digital I/O / analog input / voltage reference output |
| Pin 7 | RA3/AN3/C1OUT — Digital I/O / comparator 1 output |
| Pin 8 | RA4/T0CKI — Digital I/O / Timer 0 clock input |
| Pin 9 | RA5/SS/AN4/C2OUT — Digital I/O / comparator 2 output |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RB0/INT — Digital I/O / external interrupt |
| Pin 12 | RB1 — Digital I/O |
| Pin 13 | RB2 — Digital I/O |
| Pin 14 | RB3 — Digital I/O |
| Pin 15 | RB4 — Digital I/O |
| Pin 16 | RB5 — Digital I/O |
| Pin 17 | RB6 — Digital I/O |
| Pin 18 | RB7 — Digital I/O |
| Pin 19 | VSS — Ground reference |
| Pin 20 | VDD — Positive supply voltage (3.0 V to 5.5 V) |
Typical Applications
PIC16CE624T-04I/SS is suitable for 6 applications: White Goods Appliance Control, Industrial Sensor Interface Module, Low-Cost Motor Control (Brushed DC), User Interface Keypad / LED Panel, Battery-Backed Sensor / Metering Node, Hobbyist / Educational Embedded Platform.
White Goods Appliance Control
The PIC16CE624T-04I/SS fits appliance control boards (washing machines, dishwashers, microwave ovens) because its 1.75 KB OTP program memory holds fixed behavior code, 13 I/O pins drive relays and keypads, and the two on-chip comparators with programmable voltage reference implement sensor threshold detection (water level, temperature, door switch) without external analog ICs. Brown-out detect and power-on reset protect against supply brown-outs caused by motor inrush, while the watchdog timer recovers the controller from firmware lock-ups during EMI events. The 20-pin SSOP package enables compact PCB layouts behind user-interface panels.
Recommended
Industrial Sensor Interface Module
For sensor signal conditioning modules, the PIC16CE624T-04I/SS combines two analog comparators and a programmable voltage reference to implement threshold detection and bridge excitation directly. Its 4 MHz core provides 200 ns instruction cycles that sample sensors at kHz rates while the 96-byte RAM buffers transient measurements. The 128-byte EEPROM stores calibration coefficients, and the watchdog timer protects against field lock-ups. Industrial temperature grade -40 C to +85 C supports factory floor and outdoor enclosure deployments where SSOP-20 small form factor is desired.
Recommended
Low-Cost Motor Control (Brushed DC)
The PIC16CE624T-04I/SS controls small brushed DC motors in fans, pumps, and actuators using PWM from a timer output pin and direction control via two GPIO. The internal comparators sense current shunt voltage for stall detection, replacing an external current-sense IC. 13 I/O pins accommodate direction, brake, tachometer feedback, and a fault LED. Brown-out detect safely disables outputs when supply dips below 3.0 V, protecting the H-bridge from partial-conduction shoot-through. Industrial temperature grade supports under-hood and enclosed motor compartments.
Recommended
User Interface Keypad / LED Panel
The PIC16CE624T-04I/SS scans a 4x4 matrix keypad (8 I/O pins) and drives 7-segment or LED status indicators using the remaining GPIO, all multiplexed via timer interrupts. 1.75 KB of OTP holds the keypad debounce, mode selection, and indicator blink state machines. The on-chip EEPROM stores user preferences (last mode, brightness level) through power cycles. The SSOP-20 package's small footprint suits tight human-machine interface (HMI) layouts inside remote-control enclosures and instrument front panels.
Recommended
Battery-Backed Sensor / Metering Node
In battery-backed metering or remote sensor nodes, the PIC16CE624T-04I/SS uses brown-out detect and power-on reset to manage operation across a depleting 3 V coin-cell or 5 V USB supply. The programmable voltage reference combined with comparators triggers low-battery alerts without ADC overhead. 96 bytes RAM and 128 bytes EEPROM hold calibration tables and cumulative meter readings. The OTP memory holds the metering algorithm and serial output routine. Low CMOS quiescent current extends battery life in always-on deployments such as smart meters and asset trackers.
Recommended
Hobbyist / Educational Embedded Platform
The PIC16CE624T-04I/SS suits educational and hobbyist embedded platforms because the 35-instruction PIC16 mid-range instruction set is well-documented and supported by free MPLAB X IDE toolchains. Students can program the OTP memory once via a PICkit 3 or ICD programmer, then evaluate comparator, PWM, and EEPROM subsystems on a 20-pin SSOP breakout board. Industrial temperature grade means the same board works in both indoor labs and outdoor field exercises. Despite obsolete status, used-market availability keeps it viable for training kits and replacement of legacy boards.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624T-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624-04I/SS | PIC16CE624T-04E/SS | PIC16CE623T-04I/SS | PIC16CE624-04/SS |
|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core / Speed | 8-bit PIC16C, 4 MHz | 8-bit PIC16C, 4 MHz | 8-bit PIC16C, 4 MHz | 8-bit PIC16C, 4 MHz | 8-bit PIC16C, 4 MHz |
| Program Memory | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP |
| RAM | 96 x 8 bytes | 96 x 8 bytes | 96 x 8 bytes | 96 x 8 bytes | 96 x 8 bytes |
| EEPROM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Extended -40C to +125C | Industrial -40C to +85C | Commercial 0C to +70C |
| Packaging | Tape & Reel (T suffix) | Tube | Tape & Reel | Tape & Reel | Tube |
Key Differentiators
- Identical die, industrial grade, tube packaging (vs PIC16CE624-04I/SS)
- Extended temperature grade for harsh environments (vs PIC16CE624T-04E/SS)
- Commercial vs industrial temperature grade (vs PIC16CE624-04/SS)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 20), and a bulk 10 uF tantalum or aluminum capacitor near the supply entry. The PIC16CE624T-04I/SS draws brief inrush current during oscillator startup; an undersized decoupling network causes VDD droop that brown-out detect (BOD) may misinterpret as a power failure, triggering an unwanted reset.
OTP (One-Time Programmable) memory cannot be erased. Once a PIC16CE624T-04I/SS is programmed, firmware bugs are permanent and require a new part. Always verify the firmware on a flash equivalent (for example PIC16F628A-I/SS in SSOP-20) before committing to an OTP production run. Keep a verified programmer (PICkit 3, ICD 3) on hand and verify each blank part's ID before programming.
The SSOP-20 package has 0.65 mm pitch and 0.209 inch (5.30 mm) body width. Reserve at least 0.5 mm clearance around the part for inspection. Route OSC1/OSC2 traces short and symmetric, with a ground guard ring if a high-frequency external clock is used. Place the MCLR pull-up resistor (typically 10 kohm) within 3 mm of pin 1 to avoid spurious resets from capacitance-induced ringing.
When using the on-chip analog comparators, isolate the analog input pins (RA0-RA3) from digital switching traces with a ground guard ring. The programmable voltage reference output drives up to 10 mA but adds switching noise; place a 0.1 uF bypass capacitor on the VREF pin if the reference is used by an external ADC.
Compliance Information
AEC-Q100 not applicable (not automotive qualified); industrial temperature grade only. RoHS, REACH, lead-free, and halogen-free status are not explicitly listed in the verified web data and require confirmation from the manufacturer datasheet or factory CoC - see [DATA_NEEDED] marker on the lead-free / RoHS spec.
