PIC16LC558T-04I/SO - 8-bit OTP MCU 4MHz 3.5KB | Microchip
MPN: PIC16LC558T-04I/SO ✓ فعالPIC16LC558T-04I/SO جائزہ
An 8-bit MCU is a microcontroller built around an 8-bit data path and Harvard architecture, of which PIC is one of the oldest and most widely deployed families. PIC16C5x devices use a 12-bit instruction word and provide only 35 single-word instructions, making them easy to program in assembly or C. They sit at the bottom of the PIC taxonomy (PIC10/12/16/18/24/dsPIC/PIC32) and target cost-sensitive, low-pin-count embedded control tasks where deterministic timing and tiny footprints matter more than raw compute throughput.
Key features include 200 ns instruction cycle time at 4 MHz, a watchdog timer with on-chip RC oscillator, Power-on Reset (POR), and a programmable code-protection bit. The 13 I/O pins support high-current sink/source (25 mA sink, 20 mA source per pin) capable of directly driving LEDs and small relays, eliminating external drivers in many designs. The OTP memory supports one-time field programming, suiting volume production where firmware is finalized.
Architecturally, PIC16C5x devices use a fixed 12-bit program counter and 2-level deep hardware stack, executed by a single accumulator (W register) and a small general-purpose register file. This minimalist design avoids multi-cycle register-to-register operations and gives deterministic 4-cycle latency per instruction at 4 MHz (1 microsecond per instruction). The result is highly predictable interrupt response that has made the PIC16C5x a long-running favorite for hard-real-time control loops in appliance, automotive, and industrial timing applications.
Typical applications include appliance controllers, automotive body electronics, sensor signal conditioning, timer/replacement applications, and small custom ASIC replacements. The wide supply voltage range allows direct battery-powered operation from 4 x AA cells or a 5V regulated rail.
When designing with this device, ensure your programmer supports the OTP variant - PIC16C5x parts are NOT field-erasable; any code change requires a new part. Order evaluation units in windowed CERDIP (PIC16LC558-04/JW) for development, then switch to the SO-18 production package for volume.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes that complement the manufacturer datasheet for engineers designing with legacy PIC16C5x silicon.
کے لیے ڈراپ اِن متبادل PIC16LC558T-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 PIC16LC558T-04I/SO (یکساں فارم فیکٹر اور فٹ پرنٹ) — میں مختلف Package, Watchdog Timer, Program Memory Type, Core Architecture, Operating Temperature Range.
PIC16LC558-04I/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC558T-04/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC554T-04I/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16C558-04I/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16F54-I/SO
✅ ڈراپ-اِنقیمت کے لیے رابطہ کریں
ڈیٹا شیٹ دیکھیں →PIC16LC558T-04I/SO زیادہ سے زیادہ ریٹنگز اور برقی خصوصیات
| Core Architecture | 8-bit PIC Harvard (PIC16C5x family) |
| Program Memory Type | OTP (One-Time Programmable) EPROM, 3.5KB (2K x 14) |
| RAM | 128 bytes |
| I/O Pins | 13 |
| Maximum Clock Speed | 4 MHz |
| Instruction Cycle Time | 200 ns at 4 MHz |
| Instruction Set Size | 35 single-word instructions (12-bit) |
| Supply Voltage (Vdd) | 3 V to 6.25 V |
| آپریٹنگ درجہ حرارت رینج | -40 C to +85 C (Industrial, "I" suffix) |
| Package Type | 18-pin SOIC (SO), 0.295" / 7.50 mm body width |
| پن کی تعداد | 18 |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Power-on Reset | Yes |
| I/O Sink/Source Current | 25 mA sink / 20 mA source per pin |
| Code Protection | Yes (programmable bit) |
| ماؤنٹنگ ٹائپ | Surface Mount |
| RoHS اسٹیٹس | Compliant |
PIC16LC558T-04I/SO پن کنفیگریشن
| پن 1 | RA0 — Port A bit 0 (bidirectional I/O) |
| پن 2 | RA1 — Port A bit 1 (bidirectional I/O) |
| پن 3 | RA2 — Port A bit 2 (bidirectional I/O) |
| پن 4 | RA3 — Port A bit 3 (bidirectional I/O) |
| پن 5 | RA4 / RTCC — Port A bit 4 / RTCC timer input (bidirectional, open-drain) |
| پن 6 | RB0 — Port B bit 0 (bidirectional I/O, edge-triggered interrupt capable) |
| پن 7 | RB1 — Port B bit 1 (bidirectional I/O) |
| پن 8 | RB2 — Port B bit 2 (bidirectional I/O) |
| پن 9 | RB3 — Port B bit 3 (bidirectional I/O) |
| پن 10 | RB4 — Port B bit 4 (bidirectional I/O) |
| پن 11 | RB5 — Port B bit 5 (bidirectional I/O) |
| پن 12 | RB6 — Port B bit 6 (bidirectional I/O) |
| پن 13 | RB7 — Port B bit 7 (bidirectional I/O) |
| پن 14 | VSS — Ground reference |
| پن 15 | VDD — Positive supply (3.0 V to 6.25 V) |
| پن 16 | OSC2 — Oscillator output (crystal/RC mode) |
| پن 17 | OSC1 — Oscillator input / external clock |
| پن 18 | MCLR / VPP — Master Clear reset (active low) / Programming voltage input |
عام استعمالات
PIC16LC558T-04I/SO کے لیے موزوں ہے 6 ایپلیکیشنs: Appliance Timer Controller, Automotive Body Electronics (AEC-Q100 not qualified), Sensor Signal Conditioning Front-End, Industrial Timer and Counter Replacement, Remote Control / IR Transmitter Emulator, Small ASIC / PAL Replacement in Legacy Designs.
Appliance Timer Controller
The PIC16LC558T-04I/SO is well suited for appliance timer controllers (washing machine cycles, dishwasher fill/drain sequencing, microwave keypads) because its 4 MHz clock delivers 1 microsecond per instruction, supporting precise 200 ns-tick timing of motor and valve sequences. Its 13 high-current I/O pins (25 mA sink) can directly drive relay coils, TRIAC optocouplers, and LED indicators without driver transistors. The 3.0-6.25V supply accepts unregulated 5V rails typical in white goods, and the industrial -40C to +85C range survives under-cabinet heat. The 3.5KB OTP memory holds full state-machine firmware including user interface, sensor debouncing, and safety interlocks.
تجویز کردہ
Automotive Body Electronics (AEC-Q100 not qualified)
The PIC16LC558T-04I/SO has been used historically for non-safety automotive body modules such as interior lighting controllers, seat-position memory, and HVAC blend-door actuators where its 3.0-6.25V supply tolerates load-dump-unregulated 12V rails after external regulation. The -40C to +85C industrial range covers cabin environments but not under-hood AEC-Q100 requirements. The 200 ns deterministic instruction time and single-hardware-stack architecture make code audit simpler than modern 32-bit parts, which is valued in long-life automotive programs. For 2026 designs targeting AEC-Q100, use a PIC16F1xx or dsPIC33 instead.
تجویز کردہ
Sensor Signal Conditioning Front-End
The PIC16LC558T-04I/SO conditions and linearizes outputs from analog sensors (thermistors, RTDs, simple bridges) when paired with an external ADC because the part has no on-chip ADC. Its 4 MHz instruction rate runs software sigma-delta or dual-slope conversion loops in real time at sub-millisecond latency, while the 128-byte RAM holds 8-16 sample buffers for moving-average filtering. The CMOS LC process minimizes self-heating (important for accurate thermocouple readings) and the industrial temperature range preserves calibration from lab to field. The 13 I/O lines multiplex analog mux control and isolated UART or one-wire comms to a host controller.
تجویز کردہ
Industrial Timer and Counter Replacement
The PIC16LC558T-04I/SO is a drop-in replacement for legacy electromechanical industrial timers and counters because its 200 ns deterministic cycle time guarantees cycle accuracy, and the watchdog timer with on-chip RC oscillator latches the output to a safe state on firmware hang. The 3.0-6.25V supply range accepts 24V industrial rails after a simple linear regulator. The 35 single-word instructions keep the codebase short enough for non-MCU firmware engineers to audit, which is mandated in many UL-listed industrial products. The OTP memory enforces one-time-only code that field technicians cannot modify, supporting regulatory compliance.
تجویز کردہ
Remote Control / IR Transmitter Emulator
The PIC16LC558T-04I/SO is widely deployed in consumer remote controls because its 13 I/O are sufficient to scan a 4x4 key matrix plus an IR LED driver, and the 4 MHz clock generates accurate 38 kHz / 40 kHz carrier frequencies for NEC, RC5, and Sony IR protocols. The CMOS LC process keeps quiescent current low for battery life on alkaline cells. The 3.5KB OTP stores 50-100 device codes with look-up tables. The wide 3.0-6.25V supply range covers two AA cells (2.4-3.2V) up to a CR2032 + boost configuration.
تجویز کردہ
Small ASIC / PAL Replacement in Legacy Designs
Engineers use the PIC16LC558T-04I/SO to replace obsolete combinatorial-logic ASICs, PLAs, and PALs in long-life industrial, military, and aerospace programs because its price is competitive with new mask charges for old logic and its toolchain (MPLAB) supports the same source files for 20+ years. The 200 ns cycle time emulates roughly 5 MHz glue logic, and the 13 I/O are sufficient for 4- to 8-bit datapath replacements. The OTP code protection locks the firmware, providing equivalent security to masked-ROM ASICs. The MIL-spec-style thermal and ESD ratings of the underlying silicon meet most industrial environments without requalification.
تجویز کردہ
تجویز کردہ پروڈکٹس کا خلاصہ
کے لیے انجینئرنگ ریفرنس ڈیٹا PIC16LC558T-04I/SO — موازنہ، ڈیزائن رہنمائی، اور تعمیل کی معلومات۔
انتخاب کی گائیڈ
متبادلات کے ساتھ موازنہ
| پیرامیٹر | یہ پروڈکٹ | PIC16LC558-04I/SO | PIC16LC558T-04/SO | PIC16LC554T-04I/SO | PIC16C558-04I/SO | PIC16F54-I/SO |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Package | SOIC-18 (SO, 0.295") | SOIC-18 (SO, 0.295") - same | SOIC-18 (SO, 0.295") - same | SOIC-18 (SO, 0.295") - same | SOIC-18 (SO, 0.295") - same | SOIC-18 (SO) - same |
| Program Memory | 3.5KB OTP | 3.5KB OTP - same | 3.5KB OTP - same | 3.5KB OTP - similar | 3.5KB OTP - same | 3KB Flash - reprogrammable, distinct memory technology |
| Maximum Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 20 MHz |
| RAM | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 128 bytes | 25 bytes (smaller) |
| I/O Pins | 13 | 13 | 13 | 13 | 13 | 12 |
| Operating Temperature | -40 C to +85 C (Industrial) | -40 C to +85 C - same | 0 C to +70 C (Commercial) | -40 C to +85 C | -40 C to +85 C | -40 C to +85 C |
| Supply Voltage | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 3.0 V to 6.25 V | 2.0 V to 5.5 V |
اہم امتیازی خصوصیات
- Tap-and-Reel packaging for high-volume SMT (بمقابلہPIC16LC558-04I/SO)
- Industrial -40 C to +85 C temperature grade (بمقابلہPIC16LC558T-04/SO)
- Low-power LC CMOS process (بمقابلہPIC16C558-04I/SO)
ڈیزائن نوٹس
Estimated: PIC16LC558T-04I/SO at 4 MHz and 5V supply draws approximately 2-3 mA active and <1 uA in sleep mode (per PIC16C5x datasheet typical values). The LC CMOS process provides low quiescent current for battery-powered designs. Add a 100 nF ceramic decoupling capacitor within 5 mm of VDD and a bulk 10 uF electrolytic at the board supply entry to suppress digital switching transients, which is especially important when the IC drives relays or solenoids.
Place the MCLR pull-up resistor (typically 10 kohm) close to the MCLR pin to avoid spurious resets from noise. Keep the oscillator traces short and routed away from switching I/O to prevent injection of jitter into the system clock. Use a ground plane under the SOIC-18 footprint and route VDD as a star from a single bulk capacitor to all pins, which is critical for SOIC-18 designs where lead inductance can ring at MHz harmonics.
PIC16LC558T-04I/SO uses One-Time Programmable EPROM and CANNOT be reprogrammed in-circuit; every firmware revision requires a new physical part. For development, use windowed CERDIP (PIC16LC558-04/JW) or a Flash-based PIC16F54-I/SO until firmware is locked. Also be aware that changing from the LC variant to the standard C process (e.g. PIC16C558) increases supply current up to 2x at the same clock, which can break battery-life budgets.
تعمیل کی معلومات
RoHS-compliant per Microchip product pages. PIC16LC558 family is NOT AEC-Q100 qualified; choose PIC16F1xx or dsPIC33 with Q1 suffix for automotive. Halogen-free status not published.
