PIC16LC621T-04I/SO - 8-Bit 4MHz OTP MCU 1.75KB | Microchip
MPN: PIC16LC621T-04I/SO ✓ فعالPIC16LC621T-04I/SO جائزہ
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data memory, and I/O peripherals on one die. MCUs sit within the broader semiconductor hierarchy as a subcategory of microprocessors, alongside digital signal processors (DSPs), microcontrollers (MCUs), and application processors. The PIC16C family specifically targets low-cost general-purpose control with a RISC-based 12-bit instruction word and 8-bit data path. LC variants use CMOS technology for low power consumption, while the 621 sub-family adds a comparator peripheral for analog signal conditioning.
Key features include a two-level deep hardware stack, direct/indirect/relative addressing modes, seven or eight special function hardware registers, an internal oscillator option, and a programmable code-protection mechanism. The 18-pin SOIC (SO) package provides 0.295 in (7.50 mm) body width suitable for hand-soldering and standard SMT lines. The 04 speed grade denotes 4 MHz maximum oscillator frequency, and the LC process node enables typical active current around 2 mA at 5 V and 4 MHz.
Typical applications include appliance control modules, low-end consumer electronics, IR remote controls, sensor interfaces, and battery-powered toys. The integrated analog comparator simplifies proximity-sensor and battery-monitor front-ends without requiring an external op-amp. The OTP memory makes the part appropriate for mature products where firmware no longer requires in-field updates.
When designing with this part, account for OTP memory constraints: code must be 100 % verified before programming because OTP cannot be erased or rewritten. The 80-byte RAM limits stack depth and buffer-heavy algorithms, so designers should avoid large lookup tables or recursions in firmware planning.
کے لیے ڈراپ اِن متبادل PIC16LC621T-04I/SO — یکساں پیکیج، پن سے پن مطابقت پذیر۔ مختلف پیکیج والے پرزے جن کے لیے PCB دوبارہ کام درکار ہو، شامل نہیں ہیں۔
اس سیریز میں مختلف ورژن
اسی سیریز کے ماڈلز جو ڈراپ اِن مطابقت رکھتے ہیں PIC16LC621T-04I/SO (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Core Architecture, Program Memory Size, Program Memory Type, RAM Size.
PIC16LC621AT-04I/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC621AT-04I/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC621T-04/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC621AT-04E/SS
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC620AT-04I/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC621T-04I/SO زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core | PIC16C 8-bit RISC |
| Maximum Clock Speed | 4 MHz |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 1.75 KB (1K x 14) |
| RAM Size | 80 bytes |
| Supply Voltage Range | 2.5 V to 6.25 V |
| I/O Pins | 12 |
| آپریٹنگ درجہ حرارت رینج | -40 °C to +85 °C (Industrial) |
| Instruction Set Width | 12-bit instructions / 8-bit data path |
| Hardware Stack Depth | 2 levels |
| Addressing Modes | Direct, Indirect, Relative |
| Special Function Registers | 7-8 |
| Analog Comparator | Yes (integrated) |
| پیکیج | 18-SOIC (0.295 in / 7.50 mm body width) |
| ماؤنٹنگ ٹائپ | Surface Mount |
PIC16LC621T-04I/SO پن کنفیگریشن
| پن 1 | RA2 — Bidirectional I/O port A bit 2 |
| پن 2 | RA3 — Bidirectional I/O port A bit 3 |
| پن 3 | RA4/T0CKI — I/O port A bit 4 / Timer0 clock input |
| پن 4 | MCLR — Master Clear (reset) input, active low |
| پن 5 | VSS — Ground reference |
| پن 6 | RB0/INT — I/O port B bit 0 / External interrupt input |
| پن 7 | RB1 — Bidirectional I/O port B bit 1 |
| پن 8 | RB2 — Bidirectional I/O port B bit 2 |
| پن 9 | RB3 — Bidirectional I/O port B bit 3 |
| پن 10 | RB4 — Bidirectional I/O port B bit 4 |
| پن 11 | RB5 — Bidirectional I/O port B bit 5 |
| پن 12 | RB6 — Bidirectional I/O port B bit 6 |
| پن 13 | RB7 — Bidirectional I/O port B bit 7 |
| پن 14 | VDD — Positive supply voltage (2.5 V to 6.25 V) |
| پن 15 | OSC2/CLKOUT — Oscillator output / clock output |
| پن 16 | OSC1/CLKIN — Oscillator input / external clock input |
| پن 17 | RA0 — Bidirectional I/O port A bit 0 |
| پن 18 | RA1 — Bidirectional I/O port A bit 1 |
عام استعمالات
PIC16LC621T-04I/SO کے لیے موزوں ہے 6 ایپلیکیشنs: Appliance Control Module, IR Remote Control Transmitter, Battery-Powered Toy and Hobby Controller, Sensor Interface Module, LED Lighting Controller, Security and Accessory Modules.
Appliance Control Module
The PIC16LC621T-04I/SO is well suited for low-cost appliance control boards such as washing-machine timers, microwave user interfaces, and small kitchen-appliance motor controllers. Its 12 I/O pins comfortably drive multiplexed 7-segment displays, keypad scans, and relay/triac interface transistors, while the integrated analog comparator simplifies zero-crossing detection for line-voltage control. With 1.75 KB of OTP memory, designers can host full state-machine firmware for cycle control, sensor conditioning, and user-feedback routines at production volumes. Operating from 2.5-6.25 V, the device tolerates rectified 5 V rails common in switched-mode power supplies found inside consumer appliances.
تجویز کردہ
IR Remote Control Transmitter
For IR remote controls, the PIC16LC621T-04I/SO delivers adequate processing for RC-5, NEC, or SIRC protocol generation while consuming minimal power from two AAA cells. The 4 MHz clock supports 38 kHz carrier generation with sufficient timing margin for transmit repeat codes. With 12 I/O pins, designers can scan a 4x4 or 5x3 keypad matrix and drive an IR LED via a single transistor. The wide 2.5-6.25 V supply range lets the same firmware work in both 3 V and 4.5 V battery configurations. OTP memory prevents casual firmware theft and locks the design into production.
تجویز کردہ
Battery-Powered Toy and Hobby Controller
Battery-powered toys, electronic learning kits, and hobby robotics projects benefit from the PIC16LC621T-04I/SO's low active current at 3 V supply and 4 MHz operation. The integrated analog comparator can directly sense battery voltage for low-battery warning without an external ADC. With 80 bytes of RAM and a two-level hardware stack, designers can implement PWM motor control, LED animations, and simple sensor-fusion algorithms. The 18-SOIC package is rugged enough for through-hole-socketed prototyping on breadboards and perfboards, while still supporting SMT lines for higher-volume builds.
تجویز کردہ
Sensor Interface Module
The PIC16LC621T-04I/SO acts as a smart front-end for analog sensors in industrial and HVAC systems. Its integrated analog comparator enables threshold detection for thermistor, photodiode, or Hall-effect sensors without requiring an external op-amp, reducing BOM cost. The 12-bit instruction width and 8-bit data path support conditional logic for alarm generation, hysteresis control, and relay driver sequencing. Operating from 2.5-6.25 V, the part interfaces directly with 3.3 V or 5 V sensor networks. The wide industrial temperature range (-40 to +85 °C) suits outdoor and factory-floor deployments.
تجویز کردہ
LED Lighting Controller
For decorative LED strips, status indicators, and small lighting controllers, the PIC16LC621T-04I/SO offers sufficient I/O and computational throughput to drive multiple PWM channels for RGB color mixing. The 4 MHz clock allows software PWM at acceptable refresh rates for 4-8 LED channels. The integrated analog comparator can sample a photodiode for ambient-light feedback, enabling automatic brightness adjustment. Operating from 2.5-6.25 V supports direct connection to 5 V LED driver rails. OTP memory secures proprietary lighting effects and color sequences from reverse engineering.
تجویز کردہ
Security and Accessory Modules
The PIC16LC621T-04I/SO fits secondary modules in security systems, such as PIR sensor signal-conditioning boards, magnetic-contact expansion modules, and simple keypad readers. The integrated comparator processes analog PIR outputs directly, while 12 I/O pins drive LEDs, buzzers, and relay outputs for local alarm annunciation. OTP memory prevents code tampering in security-sensitive deployments. The 2.5-6.25 V supply range accommodates battery-backed 3.3 V systems and 5 V main-rail-powered accessories. The industrial temperature grade supports outdoor and uncontrolled-environment installations.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16LC621T-04I/SO — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16LC621AT-04I/SO | PIC16LC621AT-04I/SS | PIC16LC621T-04/SS | PIC16LC621AT-04E/SS | PIC16LC620AT-04I/SO |
|---|---|---|---|---|---|---|
| Package | 18-SOIC (7.50 mm / 300 mil) | 18-SOIC - same | 18-SSOP (narrower body) | 18-SSOP (narrower body) | 18-SSOP (narrower body) | 18-SOIC - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Core | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC | PIC16C 8-bit RISC |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Program Memory | 1.75 KB OTP (1K x 14) | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 1.75 KB OTP | 0.875 KB OTP (smaller) |
| RAM Size | 80 bytes | 80 bytes | 80 bytes | 80 bytes | 80 bytes | 80 bytes |
| 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 |
| Temperature Grade | Industrial (-40 to +85 °C) | Industrial (-40 to +85 °C) | Industrial (-40 to +85 °C) | Industrial (-40 to +85 °C) | Extended (-40 to +125 °C) | Industrial (-40 to +85 °C) |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Integrated Analog Comparator | Yes | Yes | Yes | Yes | Yes | No |
اہم امتیازی خصوصیات
- Integrated analog comparator without external op-amp (بمقابلہPIC16LC620AT-04I/SO)
- Industrial temperature grade from standard part number (بمقابلہPIC16LC621AT-04E/SS)
- Latest silicon revision in same SOIC footprint (بمقابلہPIC16LC621T-04/SS)
ڈیزائن نوٹس
OTP (One-Time Programmable) memory cannot be erased or rewritten. Each silicon die accepts a single programming cycle, so verify all firmware logic, calibration constants, and interrupt vectors with a Flash-based equivalent (PIC16F84A or PIC16F88) before committing to PIC16LC621T-04I/SO in production. Lost programming cycles due to code bugs directly impact unit cost. Always validate with engineering samples from Microchip's Sample Store before placing volume orders.
Estimated: at 5 V VDD and 4 MHz active mode, the PIC16LC621T-04I/SO draws approximately 2 mA typical, rising to ~5 mA at 6.25 V. In sleep mode, current drops below 5 uA typical. For battery-powered designs, use sleep mode aggressively and wake via the Watchdog Timer or external interrupt on RB0/INT. Add a 0.1 uF decoupling capacitor as close as possible to pin 14 (VDD) and pin 5 (VSS) to suppress switching noise from the internal clock edges.
Place the 18-SOIC package with pin 1 orientation marked clearly on the silkscreen. The MCLR pin (pin 4) requires a pull-up resistor (typically 10 kOhm) to VDD for normal operation; without it the device stays in reset. If using an external crystal, keep traces from OSC1 (pin 16) and OSC2 (pin 15) short and surround them with a ground guard ring to minimize EMI radiation. The analog comparator inputs are shared with digital I/O - if precision analog sensing is required, isolate the analog traces from high-frequency digital signals on the same port.
تعمیل کی معلومات
The PIC16LC621T-04I/SO is a legacy OTP family part from Microchip. RoHS and REACH compliance status not explicitly stated in the retrieved distributor data; legacy PIC16C OTP parts are commonly non-RoHS due to the OTP process node. For RoHS-compliant designs, verify with Microchip directly or migrate to the PIC16F family.