PIC16CE624T-20I/SS - 8-bit OTP MCU, 1.75KB, 20MHz, SSOP-20 | Microchip
MPN: PIC16CE624T-20I/SS ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.39 | $3.39 |
| 10 | $3.05 | $30.50 |
| 100 | $2.71 | $271.00 |
| 500 | $2.42 | $1,210.00 |
| 1,000 | $2.18 | $2,180.00 |
PIC16CE624T-20I/SS Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, non-volatile program memory, working RAM, and integrated peripherals. 8-bit MCUs such as the PIC16 family target cost-sensitive embedded control tasks where deterministic instruction timing, low power, and small package footprint are more important than raw throughput. Within the broader taxonomy, the PIC16CE624 sits at: PIC16CE6XX family -> PIC16C mid-range -> PICmicro 8-bit -> Microchip MCU portfolio.
Key differentiating features: 35 single-word instructions, all single-cycle except program branches (two-cycle), in-system serial programming (ICSP) capability, In-Circuit Debugger support, and 128 bytes of EEPROM for non-volatile user data storage. The CMOS OTP program memory supports one-time field programming, making this part ideal for production-volume applications.
The device uses a Harvard RISC architecture with separate program and data buses, allowing simultaneous instruction fetch and operand access. The 14-bit instruction word provides single-cycle arithmetic, logic, and bit-manipulation operations across the entire register file, enabling compact C and assembly code.
Typical applications include appliance control, security and alarm systems, automotive body electronics, sensor signal conditioning, consumer electronics, and low-power remote sensor nodes. The integrated analog comparators with programmable voltage reference support battery-monitoring and threshold-detection tasks without external components.
Design tip: keep VDD decoupling within 5 mm of the VDD pin with a 0.1 uF ceramic capacitor, place the MCLR pull-up within 25 mm, and reserve the ICSP clock/data pads for production programming even on prototypes.
This page consolidates distributor pricing, drop-in alternatives, and design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16CE624T-20I/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-20I/SS (same form factor and footprint) — differing in Package, Program Memory Size, Core Architecture, EEPROM Data Memory, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16CE624-20I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16CE624T-20E/SS
✅ Drop-In✓ In Stock
$3.1 / Unit
View Datasheet →PIC16CE624T-04I/SS
✅ Drop-In✓ In Stock
$2.85 / Unit
View Datasheet →PIC16CE625T-20I/SS
✅ Drop-In✓ In Stock
$1.02 / Unit
View Datasheet →PIC16CE624T-20I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM | 96 bytes |
| EEPROM Data Memory | 128 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Execution Time | 200 ns (single cycle, 133 ns core) |
| Operating Voltage | 2.5 V to 5.5 V (3.3 V / 5 V nominal) |
| I/O Pins | 13 |
| Timers | 1 x 8-bit (TMR0 with 8-bit prescaler) |
| Analog Comparators | 2 with programmable voltage reference |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| In-Circuit Programming | ICSP support |
| In-Circuit Debug | ICD support |
| Package | 20-pin SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -40 C to +85 C (industrial, 'I' suffix) |
PIC16CE624T-20I/SS Pin Configuration
| Pin 1 | RA2/AN2 — Bidirectional I/O / analog comparator input |
| Pin 2 | RA3/AN3 — Bidirectional I/O / analog comparator input |
| Pin 3 | RA4/T0CKI — Bidirectional I/O / Timer0 clock input |
| Pin 4 | MCLR — Master Clear (reset) input, active low |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Bidirectional I/O / external interrupt |
| Pin 7 | RB1 — Bidirectional I/O |
| Pin 8 | RB2 — Bidirectional I/O |
| Pin 9 | RB3 — Bidirectional I/O |
| Pin 10 | RB4 — Bidirectional I/O |
| Pin 11 | RB5 — Bidirectional I/O |
| Pin 12 | RB6 — Bidirectional I/O / ICSP clock |
| Pin 13 | RB7 — Bidirectional I/O / ICSP data |
| Pin 14 | VDD — Positive supply (2.5 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT — Crystal/oscillator output or clock out |
| Pin 16 | OSC1/CLKIN — Crystal/oscillator input or external clock |
| Pin 17 | RA0/AN0 — Bidirectional I/O / analog comparator input |
| Pin 18 | RA1/AN1 — Bidirectional I/O / analog comparator input |
| Pin 19 | RA5/MCLR_VPP — Bidirectional I/O / alternate MCLR / programming voltage |
| Pin 20 | NC — Not connected (per datasheet pinout for 20-pin variant) |
Typical Applications
PIC16CE624T-20I/SS is suitable for 6 applications: Appliance Control, Security and Alarm Systems, Automotive Body Electronics, Sensor Signal Conditioning, Consumer Electronics Remote Controls, Industrial Timer and Sequencer Modules.
Appliance Control
The PIC16CE624T-20I/SS fits appliance control applications because its 13 GPIO, two analog comparators, and programmable voltage reference handle user input switches, LED indicators, relay drivers, and sensor threshold detection in a single 20-pin SSOP device. Its 20 MHz clock delivers 5 MIPS of deterministic throughput for real-time PWM motor control, while 128 bytes of EEPROM stores user-configurable settings (wash cycles, fan speeds, temperature setpoints) that must survive power cycles. The integrated comparators eliminate external op-amps for thermistor or current-sense monitoring, reducing BOM cost. Compared to a discrete logic implementation, the CE624 integrates the entire control loop in one OTP-programmed part at low unit cost.
Recommended
Security and Alarm Systems
The PIC16CE624T-20I/SS is widely used in PIR motion detectors, door/window sensors, and basic alarm panels because its two analog comparators can directly interface with PIR sensor signal chains and reed switches without external amplifiers. The 128-byte EEPROM stores installer codes and zone configuration, while the watchdog timer with dedicated RC oscillator ensures lockup-free operation in unattended installations. Operating from 2.5 V to 5.5 V, the part runs directly from 3 V lithium or 5 V regulated supplies. The 35-instruction RISC core fits typical alarm state machines in under 1 KB of code, and the OTP memory prevents reverse engineering of proprietary sensor-fusion algorithms in commercial security products.
Recommended
Automotive Body Electronics
Within automotive body and interior subsystems (window lifts, seat controllers, lighting modules, climate panel I/O), the PIC16CE624T-20I/SS provides a cost-optimized 8-bit controller in the industrial -40 C to +85 C temperature grade. Its two comparators with programmable voltage reference support battery voltage monitoring and analog sensor interfaces, while 13 GPIO directly drive relay coils, LED arrays, and switch matrix inputs without external logic. The 1.75 KB OTP program memory is sufficient for seat-position memory, mirror-folding sequences, or interior lighting fade algorithms. Designers targeting AEC-Q100 should select the PIC16CE624T-20I/SS as a baseline and validate compliance per their specific automotive OEM requirements.
Recommended
Sensor Signal Conditioning
The PIC16CE624T-20I/SS is a strong fit for low-channel-count sensor signal conditioning hubs where its two analog comparators with programmable voltage reference implement window comparators, threshold detectors, and bridge-sensor excitation controls. Combined with the 8-bit timer, the part generates PWM excitation for resistive sensors and timestamps comparator events without external counters. The 128 bytes of EEPROM retain calibration coefficients across factory programming and field replacement, and 96 bytes of RAM buffer raw sensor frames before UART/ISP output. The 20 MHz instruction rate enables 10 kHz sampling loops with software filtering, sufficient for temperature, pressure, and flow sensor front-ends in industrial IoT edge nodes.
Recommended
Consumer Electronics Remote Controls
Battery-powered IR/RF remote controls benefit from the PIC16CE624T-20I/SS because the 2.5 V minimum supply lets it run from two alkaline or a single lithium cell, while the CMOS RISC core keeps active current low. The 13 GPIO drive keypad matrices (up to 4x4), IR LEDs, status LEDs, and low-battery warning circuits directly. The 128 bytes of EEPROM store device-pairing codes and user preferences that survive battery swaps. OTP programming locks the protocol stack against cloning, important for set-top box and AV receiver OEMs. Industrial temperature grade supports outdoor thermostats and garage-door remotes.
Recommended
Industrial Timer and Sequencer Modules
Programmable logic controllers, conveyor sequencers, and machine-tool timers often use the PIC16CE624T-20I/SS as a low-cost sequencing brain because its 8-bit timer, watchdog timer, and 13 GPIO drive contactors, solenoids, and indicator lamps in a deterministic 200 ns-per-instruction cycle. The integrated programmable voltage reference supports analog threshold-based start/stop conditions. 128 bytes of EEPROM hold sequence recipes and runtime counters that must survive maintenance power cycles. The OTP program memory protects proprietary machine sequences in factory automation. The SSOP-20 footprint drops onto existing PIC16C5X/PIC16CXXX designs as a pin-compatible upgrade path with full peripheral parity.
Recommended
Recommended Products Summary
Engineering reference data for PIC16CE624T-20I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16CE624-20I/SS | PIC16CE624T-20E/SS | PIC16CE624T-04I/SS | PIC16CE625T-20I/SS |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-pin SSOP (5.30 mm) | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same | 20-pin SSOP - same |
| Program Memory | 1.75 KB OTP EPROM (1K x 14) | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 2.25 KB OTP (2K x 14) |
| RAM | 96 bytes | 96 bytes | 96 bytes | 96 bytes | 96 bytes |
| EEPROM Data Memory | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes |
| Maximum Clock | 20 MHz | 20 MHz | 20 MHz | 4 MHz | 20 MHz |
| Operating Temperature | -40 C to +85 C (industrial) | -40 C to +85 C | -40 C to +125 C (extended) | -40 C to +85 C | -40 C to +85 C |
| I/O Pins | 13 | 13 | 13 | 13 | 13 |
Key Differentiators
- On-chip 128-byte EEPROM for non-volatile data storage (vs PIC16C624 (no -E suffix))
- Same-family larger-memory variant for future expansion (vs PIC16CE624T-04I/SS (same family, 4 MHz speed))
- Industrial temperature grade for harsh environments (vs PIC16CE624-20/P (commercial 0 C to +70 C, PDIP))
Design Notes
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 14) and a bulk 10 uF tantalum or aluminum polymer capacitor on the same supply rail near the MCU. For battery-powered designs, add a 100 kohm pull-down on MCLR so floating reset does not occur at sub-threshold VDD. The PIC16CE624T-20I/SS operates from 2.5 V to 5.5 V; below 4.5 V the maximum clock frequency derates per the PIC16CE62X datasheet electrical characteristics, so verify the chosen crystal against the VDD range before committing the BOM.
Route the oscillator traces (OSC1 pin 16, OSC2 pin 15) as short as possible and guard them with a ground ring to minimize EMI pickup and stray capacitance. Keep the ICSP clock (RB6, pin 12) and ICSP data (RB7, pin 13) pads accessible on production boards - even when not used in the final product, they enable firmware provisioning and field recovery. Avoid routing high-speed switching signals (relay coils, LED PWM) under the SSOP-20 footprint to prevent injection of ground bounce into the analog comparators.
Do not assume that PIC16CE624T-20I/SS and PIC16F628A-20I/SS share identical configuration bits - the flash part has additional CONFIG registers for brown-out, low-voltage programming, and code protection that the OTP CE624 lacks. When migrating from CE624 to F628A, recompile and re-verify the configuration word. Estimated: the OTP CE624 cannot be erased, so any configuration mistake during production programming bricks the part; always program at least one known-good prototype before committing to volume runs.
The SSOP-20 package thermal resistance theta_JA is approximately 90 C/W on a 2-layer JEDEC EIA/JESD51 test board, well above the DIP-18 counterpart. For designs operating at full 20 MHz / 5.5 V across the industrial -40 C to +85 C range, junction temperature remains safely below 125 C because the CMOS core dissipates under 50 mW at full activity. However, sealed enclosures with no airflow should be validated with a thermocouple on pin 14 (VDD) to confirm margin, especially when driving multiple GPIO outputs at high duty cycle.
Compliance Information
RoHS and lead-free status were not present in the verified web data; set to unknown. The PIC16CE624T-20I/SS is a Microchip NRND (Not Recommended for New Designs) part per Microchip's product lifecycle system - verify current status before committing to new production. The -I temperature grade is industrial (-40 C to +85 C) but does not constitute AEC-Q100 automotive qualification.
