PIC16LC558T-04I/SO - 8-bit OTP MCU 4MHz 3.5KB | Microchip
料号： PIC16LC558T-04I/SO ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $4.95 | $4.95 |
| 10 | $4.4 | $44.00 |
| 100 | $3.85 | $385.00 |
| 500 | $3.42 | $1,710.00 |
| 1,000 | $3.05 | $3,050.00 |
PIC16LC558T-04I/SO 概述
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.
直接替换替代料： PIC16LC558T-04I/SO ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PIC16LC558T-04I/SO （相同外形与封装尺寸） ——差异在于 Watchdog Timer, Package, Program Memory Type, Core Architecture, Operating Temperature Range.
快速对比工具——选择替代料号进行并排对比：
PIC16LC558-04I/SO
✅ 直接替换✓ 有现货
$1.1 / 个
查看数据手册 →PIC16LC558T-04/SO
✅ 直接替换✓ 有现货
$2.65 / 个
查看数据手册 →PIC16LC554T-04I/SO
✅ 直接替换✓ 有现货
$1.78 / 个
查看数据手册 →PIC16C558-04I/SO
✅ 直接替换✓ 有现货
$3.11 / 个
查看数据手册 →PIC16F54-I/SO
✅ 直接替换✓ 有现货
$0.977 / 个
查看数据手册 →PIC16LC558T-04I/SO 最大额定值与电气特性
| 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 |
| 工作温度范围 | -40 C to +85 C (Industrial, "I" suffix) |
| Package Type | 18-pin SOIC (SO), 0.295" / 7.50 mm body width |
| 引脚数量 | 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) |
| 安装类型 | Surface Mount |
| RoHS 状态 | Compliant |
PIC16LC558T-04I/SO 引脚配置
| 引脚 1 | RA0 — Port A bit 0 (bidirectional I/O) |
| 引脚 2 | RA1 — Port A bit 1 (bidirectional I/O) |
| 引脚 3 | RA2 — Port A bit 2 (bidirectional I/O) |
| 引脚 4 | RA3 — Port A bit 3 (bidirectional I/O) |
| 引脚 5 | RA4 / RTCC — Port A bit 4 / RTCC timer input (bidirectional, open-drain) |
| 引脚 6 | RB0 — Port B bit 0 (bidirectional I/O, edge-triggered interrupt capable) |
| 引脚 7 | RB1 — Port B bit 1 (bidirectional I/O) |
| 引脚 8 | RB2 — Port B bit 2 (bidirectional I/O) |
| 引脚 9 | RB3 — Port B bit 3 (bidirectional I/O) |
| 引脚 10 | RB4 — Port B bit 4 (bidirectional I/O) |
| 引脚 11 | RB5 — Port B bit 5 (bidirectional I/O) |
| 引脚 12 | RB6 — Port B bit 6 (bidirectional I/O) |
| 引脚 13 | RB7 — Port B bit 7 (bidirectional I/O) |
| 引脚 14 | VSS — Ground reference |
| 引脚 15 | VDD — Positive supply (3.0 V to 6.25 V) |
| 引脚 16 | OSC2 — Oscillator output (crystal/RC mode) |
| 引脚 17 | OSC1 — Oscillator input / external clock |
| 引脚 18 | MCLR / VPP — Master Clear reset (active low) / Programming voltage input |
典型应用
PIC16LC558T-04I/SO 适用于 6 应用s: 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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： PIC16LC558T-04I/SO ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Tap-and-Reel packaging for high-volume SMT （对比 PIC16LC558-04I/SO)
- Industrial -40 C to +85 C temperature grade （对比 PIC16LC558T-04/SO)
- Low-power LC CMOS process （对比 PIC16C558-04I/SO)
设计说明
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.
合规信息
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.
