PIC16LC620T-04I/SS - 8-bit 4MHz PIC MCU, 896B OTP, 20-SSOP
MPN: PIC16LC620T-04I/SS β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.95 | $29.50 |
| 100 | $2.55 | $255.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.75 | $1,750.00 |
PIC16LC620T-04I/SS Overview
An OTP microcontroller (One-Time Programmable) is a non-flash, non-EEPROM based MCU whose program memory is written once via a device programmer and cannot be field-updated. OTP parts are widely used in high-volume consumer goods, appliances, and toys where firmware is finalized at production and code changes are unnecessary, because OTP silicon is denser and cheaper per die than flash. The PIC16C core uses a 14-bit instruction word with a RISC-style architecture, a two-level hardware stack, and seven or eight special-function hardware registers, providing deterministic interrupt latency and very small code footprints.
Key features include 12 general-purpose I/O pins, brown-out detect (BOD) and power-on reset (POR) for robust cold-start behavior, a watchdog timer (WDT) for runaway-code recovery, and an internal 4 MHz oscillator option that removes the need for an external crystal in many designs. The OTP memory is partitioned as 512 x 14 bits, while the 80-byte RAM supports small data tables and stack operations. Combined, these features make the PIC16LC620T-04I/SS a compact, low-cost control engine.
Typical applications include remote controls, white-goods and small-appliance controls, LED drivers, sensor front-ends, battery chargers, and simple sensor hubs. The wide 2.5 V to 6.25 V supply range enables direct operation from 3-cell battery stacks, regulated 5 V rails, or low-dropout (LDO) post-regulation of higher voltage busses. Brown-out reset ensures clean firmware execution even with weak or sagging supplies.
When designing with this device, note that the 'I' suffix indicates the industrial -40 C to +85 C operating-temperature grade and the 'T' suffix indicates Tape & Reel. OTP memory cannot be rewritten, so production programming must be planned. Engineers targeting in-system reprogrammability should migrate to a flash-based PIC16F family equivalent (e.g., PIC16F620A-I/SS) that shares the same 20-SSOP footprint.
Drop-in alternatives for PIC16LC620T-04I/SS 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 PIC16LC620T-04I/SS (same form factor and footprint) β differing in Package, Program Memory Size, Program Memory Type, Core, Operating Temperature Range.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16LC620-04I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16LC620A-04I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$1.55 / Unit
View Datasheet βPIC16LC620AT-04I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16LC620AT-04E/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―β In Stock
$2.45 / Unit
View Datasheet βPIC16LC620A-04E/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16F620A-I/SS
β Drop-In β οΈ εζ°εΎ ιͺθ―π Reference alternative (not in catalog)
PIC16LC620T-04I/SS Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC 16C |
| Core | PIC16C (8-bit, 14-bit instruction word) |
| Core Size | 8-bit |
| Clock Speed (Max) | 4 MHz |
| Program Memory Size | 896 B (512 x 14) |
| Program Memory Type | OTP (One-Time Programmable) |
| RAM Size | 80 B |
| Supply Voltage Range | 2.5 V to 6.25 V |
| I/O Pins | 12 to 13 |
| Peripherals | Brown-out Detect (BOD), Power-on Reset (POR), Watchdog Timer (WDT) |
| Operating Temperature Grade | Industrial (-40 C to +85 C), 'I' suffix |
| Package | 20-SSOP (5.30 mm / 0.209 in body width) |
| Mounting Type | Surface Mount (Tape & Reel, 'T' suffix) |
| Pin Count | 20 |
| Lifecycle Stage | ACTIVE (per distributor listings) |
| RoHS Status | See Microchip product page (not confirmed in verified data) |
PIC16LC620T-04I/SS Pin Configuration
| Pin 1 | RA2 β Port A bit 2 / AN2 / VREF (analog or digital I/O) |
| Pin 2 | RA3 β Port A bit 3 / AN3 / VREF (analog or digital I/O) |
| Pin 3 | RA4 β Port A bit 4 / T0CKI (digital I/O or Timer0 clock input) |
| Pin 4 | MCLR β Master Clear (reset, active low) |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RB0/INT β Port B bit 0 / external interrupt input |
| Pin 7 | RB1 β Port B bit 1 |
| Pin 8 | RB2 β Port B bit 2 |
| Pin 9 | RB3 β Port B bit 3 |
| Pin 10 | RB4 β Port B bit 4 |
| Pin 11 | RB5 β Port B bit 5 |
| Pin 12 | RB6 β Port B bit 6 |
| Pin 13 | RB7 β Port B bit 7 |
| Pin 14 | VDD β Positive supply (2.5 V to 6.25 V) |
| Pin 15 | OSC2 β Oscillator output / CLKOUT |
| Pin 16 | OSC1 β Oscillator input / CLKIN |
| Pin 17 | RA0 β Port A bit 0 / AN0 |
| Pin 18 | RA1 β Port A bit 1 / AN1 |
| Pin 19 | NC β Not connected (per datasheet) |
| Pin 20 | NC β Not connected (per datasheet) |
Typical Applications
PIC16LC620T-04I/SS is suitable for 6 applications: Consumer Remote Controls, Small Appliance Control Boards, LED Lighting Drivers, Battery Chargers and Power Management, Sensor Front-End Modules, Industrial Control Panels.
Consumer Remote Controls
The PIC16LC620T-04I/SS fits IR/RF remote controls because its 4 MHz PIC16C core delivers deterministic 1 MIPS throughput and a small code footprint in 896 B OTP, enough for button-scan matrices and protocol encoders (RC5, NEC, SIRC). Brown-out reset and power-on reset prevent false wake events when battery voltage sags at end-of-life. The 12 GPIO pins directly drive a 4x4 keypad plus an IR LED driver transistor, while the watchdog timer recovers the firmware if RF noise corrupts program flow. At 2.5 V to 6.25 V, it runs directly from two or three alkaline cells without an LDO.
Recommended
Small Appliance Control Boards
In coffee makers, toasters, blenders, and rice cookers, the PIC16LC620T-04I/SS serves as the timing and sensor-conditioning MCU. Its 80-byte RAM handles momentary keypad state, while the 896 B OTP stores appliance cycle firmware that rarely changes after qualification. The 13 GPIO drive relays, triac optocouplers, seven-segment LED displays, and NTC temperature sensors. The wide 2.5 V to 6.25 V supply permits direct operation from rectified mains via an RC dropper, simplifying BOM cost. Brown-out reset prevents latch-up during brown-out events common with inductive loads.
Recommended
LED Lighting Drivers
For low-power architectural LED drivers and accent lighting, the PIC16LC620T-04I/SS generates PWM dimming waveforms and color-mixing sequences in 896 B OTP firmware. The PIC16C core executes PWM loops with deterministic timing, allowing smooth 8-bit dimming without flicker. GPIO pins directly drive MOSFET gate drivers (e.g., MIC4416) for high-side PWM dimming of LED strings. The 2.5 V to 6.25 V supply is well-matched to 5 V regulated LED-driver rails, and the industrial temperature grade ensures reliable operation in enclosed luminaires that can reach +70 C internally.
Recommended
Battery Chargers and Power Management
The PIC16LC620T-04I/SS fits NiMH and Li-ion charger control where simple state-machine logic monitors V/I/T and terminates charge via -delta-V or timer. The 4 MHz core is fast enough to oversample battery voltage with the internal comparator, and 80 B RAM holds charge-state context across power cycles. The 12 GPIO drive charge FETs, status LEDs, and enable pins of companion LDO/battery-protection ICs. Wide 2.5 V to 6.25 V supply accommodates 3-cell NiMH stacks and single-cell Li-ion with protection FET drops. OTP memory locks the final algorithm, preventing field tampering.
Recommended
Sensor Front-End Modules
In HVAC, weather stations, and IoT sensor hubs, the PIC16LC620T-04I/SS reads analog sensors via an external ADC (or its internal comparator) and applies linearization in firmware. The 4 MHz core runs calibration tables in 896 B OTP, while 80 B RAM buffers up to 12 sensor channels in round-robin fashion. Brown-out reset protects against brown-out during relay-driven load surges. The industrial temperature grade covers outdoor installations. GPIO wake the radio on threshold-cross events, extending battery life in unattended sensor nodes.
Recommended
Industrial Control Panels
The PIC16LC620T-04I/SS handles I/O expansion and indicator logic in industrial control panels, where 13 GPIO scan a 4x4 keypad plus 9 status LEDs. The PIC16C core's deterministic interrupt latency keeps keypad debounce and LED multiplexing glitch-free. Industrial -40 C to +85 C temperature grade survives factory-floor thermal swings. OTP memory locks the panel configuration to prevent accidental reprogramming by maintenance staff. The wide supply range interfaces to 24 V industrial rails via a simple zener-based 5 V regulator, reducing BOM.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC620T-04I/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC620-04I/SS | PIC16LC620A-04I/SS | PIC16LC620AT-04I/SS | PIC16LC620AT-04E/SS | PIC16LC620A-04E/SS | PIC16F620A-I/SS |
|---|---|---|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC16C 8-bit | PIC16C 8-bit - same | PIC16C 8-bit - same | PIC16C 8-bit - same | PIC16C 8-bit - same | PIC16C 8-bit - same | PIC16 8-bit (Flash family) |
| Clock Speed (Max) | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| Program Memory | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B OTP | 896 B Flash (reprogrammable) |
| RAM Size | 80 B | 80 B | 80 B | 80 B | 80 B | 80 B | 96 B |
| I/O Pins | 12 to 13 | 12 to 13 | 12 to 13 | 12 to 13 | 12 to 13 | 12 to 13 | 12 |
| Supply Voltage | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +85 C (Industrial) | -40 C to +125 C (Extended) | -40 C to +125 C (Extended) | -40 C to +85 C (Industrial) |
Key Differentiators
- Lowest-cost OTP variant with Tape & Reel packaging (vs PIC16LC620-04I/SS)
- Industrial temperature grade (-40 C to +85 C) vs commercial PIC16C620A (vs PIC16LC620A-04I/SS)
- Pin-compatible migration path to Flash memory (vs PIC16F620A-I/SS)
Design Notes
PIC16LC620T-04I/SS accepts 2.5 V to 6.25 V at VDD. For 3-cell alkaline or NiMH battery applications, connect VDD directly to the battery stack through a 100 nF decoupling capacitor within 5 mm of the pin and a 10 uF bulk capacitor. For 24 V industrial rails, use a zener-based 5 V regulator or a low-cost LDO such as MCP1700. Estimated: total quiescent current is approximately 1-2 mA at 4 MHz / 5 V, so a 100 nF + 10 uF decoupling pair is adequate for typical GPIO loads.
OTP memory cannot be rewritten once programmed. Production firmware must be locked before programming, and any code change requires a new silicon batch. Engineers who need firmware iteration should choose the flash-based PIC16F620A-I/SS in the same 20-SSOP footprint to avoid PCB rework. Also note that the MCLR pin must be tied to VDD through a 10 kohm pull-up for normal operation; leaving it floating causes intermittent resets.
The 20-SSOP package (0.65 mm pitch) requires careful PCB layout. Route all I/O signals on the top layer to avoid vias on the SSOP pads. Place the decoupling capacitor and bulk capacitor on the same side as the IC, within 5 mm of VDD/VSS pins. Add a ground pour under the IC for thermal dissipation and noise immunity. For hand prototyping, use SSOP-to-DIP adapter boards from suppliers such as SchmartBoard or Aries Electronics. Estimated: standard SSOP land pattern per IPC-7351.
The PIC16LC620T-04I/SS MCLR pin is sensitive to fast transients. Add a 100 nF capacitor from MCLR to VDD to form an RC filter (with the 10 kohm pull-up, time constant approx 1 ms) that rejects short noise pulses. On long MCLR traces, add a TVS diode such as PESD5V0L1BA to clamp ESD events. Watchdog timer should be enabled in firmware for recovery from unexpected code-flow corruption.
Compliance Information
RoHS, REACH, lead-free, and halogen-free status not confirmed in the verified web data; refer to Microchip's product page or contact Microchip for an authoritative compliance certificate. AEC-Q100 is not applicable for general-purpose industrial microcontrollers.
