PIC16LC58B-04/SO - 8-Bit 4MHz OTP MCU 3KB | Microchip
MPN: PIC16LC58B-04/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.55 | $25.50 |
| 100 | $2.15 | $215.00 |
| 500 | $1.85 | $925.00 |
| 1,000 | $1.62 | $1,620.00 |
PIC16LC58B-04/SO Overview
What is a PIC microcontroller? A PIC (Peripheral Interface Controller) microcontroller is a compact, self-contained computer-on-a-chip built around a Harvard RISC architecture with separate program and data buses. Microchip's PIC16C5X family pioneered low-cost 8-bit OTP/EPROM/ROM MCUs, with the PIC16C5X positioned in the hierarchy as: PIC16C5X -> PIC16 family -> 8-bit MCU -> microcontroller -> embedded computing IC. The 'LC' suffix designates the low-power CMOS variant, while the 'B' suffix marks the second silicon revision.
Key features include 12 I/O pins across two ports, a two-level deep hardware stack, a single 8-bit timer/counter, watchdog timer with on-chip RC oscillator, power-on reset, and a wide 2.5V to 6.25V supply voltage range. The 4 MHz oscillator frequency provides 1 microsecond instruction cycle time, and the RISC architecture delivers most instructions in a single cycle.
The PIC16LC58B uses a 12-bit wide instruction word with a separate 8-bit data path, producing 2:1 code compression versus typical 8-bit CISC architectures. Seven or eight special function hardware registers support direct, indirect, and relative addressing modes. The fully static CMOS design allows clock stopping for ultra-low standby power.
Typical applications include appliance control, automotive body electronics, industrial sensor interfacing, low-end consumer products, and battery-powered instrumentation. The 18-pin SOIC package suits both prototyping and space-constrained production boards, while the OTP memory suits low-volume and cost-driven designs.
When designing with this part, note that OTP parts require a device programmer for code loading - choose flash-based PIC16F equivalents for in-field reprogrammability. The PIC16LC58B-04/SO is the commercial temperature grade variant (0C to +70C operating range); the 'I' suffix (PIC16LC58B-04I/SO) specifies industrial -40C to +85C.
This page synthesizes distributor pricing, parametric drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16LC58B-04/SO — 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 PIC16LC58B-04/SO (same form factor and footprint) — differing in Program Memory Size, Package, Program Memory Type, Core Architecture, Operating Temperature Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC58B-04I/SO
✅ Drop-In✓ In Stock
$0.92 / Unit
View Datasheet →PIC16C58B-04/SO
✅ Drop-In✓ In Stock
$1.88 / Unit
View Datasheet →PIC16LC58BT-04/SO
✅ Drop-In✓ In Stock
$2.4 / Unit
View Datasheet →PIC16LC558-04I/SO
✅ Drop-In✓ In Stock
$1.1 / Unit
View Datasheet →PIC16LC558T-04/SO
✅ Drop-In✓ In Stock
$2.65 / Unit
View Datasheet →PIC16LC554T-04/SO
✅ Drop-In✓ In Stock
$3.85 / Unit
View Datasheet →PIC16LC58B-04/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit RISC (PIC16C5X family) |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3KB (2K x 12 words) |
| Data RAM | 73 bytes |
| Maximum Clock Frequency | 4 MHz |
| Instruction Cycle Time | 1 microsecond at 4 MHz |
| Supply Voltage Range | 2.5 V to 6.25 V |
| I/O Pins | 12 |
| Timers | 1 x 8-bit timer/counter |
| Watchdog Timer | Yes (with on-chip RC oscillator) |
| Stack Depth | 2 levels (hardware) |
| Addressing Modes | Direct, Indirect, Relative |
| Special Function Registers | 7 or 8 |
| Instruction Width | 12 bits |
| Data Path Width | 8 bits |
| Package | 18-SOIC (0.300 inch, SO-18) |
| Mounting Type | Surface Mount |
| Operating Temperature Range | 0C to +70C (Commercial) |
| Lead-Free / RoHS | See compliance notes |
| Pin Count | 18 |
PIC16LC58B-04/SO Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O pin, Port A bit 2 |
| Pin 2 | RA3 — Bidirectional I/O pin, Port A bit 3 |
| Pin 3 | RTCC — RTCC timer/counter input pin |
| Pin 4 | MCLR/VPP — Master clear reset input / programming voltage input |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O pin, Port B bit 0 |
| Pin 7 | RB1 — Bidirectional I/O pin, Port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O pin, Port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O pin, Port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O pin, Port B bit 4 |
| Pin 11 | RB5 — Bidirectional I/O pin, Port B bit 5 |
| Pin 12 | RB6 — Bidirectional I/O pin, Port B bit 6 |
| Pin 13 | RB7 — Bidirectional I/O pin, Port B bit 7 |
| Pin 14 | VDD — Positive supply voltage |
| Pin 15 | OSC2 — Oscillator output / clock out |
| Pin 16 | OSC1 — Oscillator input / external clock in |
| Pin 17 | RA0 — Bidirectional I/O pin, Port A bit 0 |
| Pin 18 | RA1 — Bidirectional I/O pin, Port A bit 1 |
Typical Applications
PIC16LC58B-04/SO is suitable for 6 applications: Appliance Control, Automotive Body Electronics, Industrial Sensor Interfacing, Low-End Consumer Products, Battery-Powered Instrumentation, Educational and Development Boards.
Appliance Control
The PIC16LC58B-04/SO fits appliance control boards because its 4 MHz RISC core and 12 I/O pins provide enough bandwidth for keypad scanning, relay drivers, and triac phase control while keeping BOM cost minimal. The 3 KB OTP program memory accommodates typical washing-machine, microwave, and dishwasher control sequences including state machines and timing loops. The 2.5 V-6.25 V supply range tolerates unregulated transformer-derived rails common in white goods, and the 18-SOIC package supports wave or reflow soldering on low-cost FR-2 PCBs. Unlike larger flash MCUs, this part's OTP forces one-time programming, which lowers unit cost in high-volume appliance production runs. Source: Microchip PIC16C5X family datasheet typical applications section.
Recommended
Automotive Body Electronics
In automotive body controllers (mirror adjust, simple seat controllers, light timers) the PIC16LC58B-04/SO provides the deterministic 1 us instruction cycle needed for timing-critical debounce and PWM routines, while its 12 I/O pins directly drive small relay or LED loads. The wide 2.5 V-6.25 V supply tolerates load-dump events on 12 V automotive rails (when pre-regulated). For under-hood or AEC-Q100-qualified applications, the PIC16LC58B-04I/SO industrial variant extends the operating range to -40 C to +85 C. The OTP memory suits high-volume automotive SKUs where code is locked at production. Place the MCU close to a 100 nF decoupling cap on VDD to handle cranking transients. Source: Microchip PIC16C5X automotive applications notes.
Recommended
Industrial Sensor Interfacing
For low-speed sensor front-ends (thermistor readout, 4-20 mA loop detection, limit switches, simple encoder decoding) the PIC16LC58B-04/SO offers sufficient MIPS at 4 MHz to bit-bang serial protocols and pulse-count events without external UART. The 73 bytes of RAM fit small state machines and a few-point linearization tables, while the watchdog timer prevents lockup in unattended field installations. The 2.5 V minimum supply permits direct connection to 3.3 V sensor rails. For harsh industrial environments, choose PIC16LC58B-04I/SO (industrial -40C to +85C). The 18-SOIC footprint supports compact sensor housings. Source: Microchip PIC16C5X datasheet timer and interrupt sections.
Recommended
Low-End Consumer Products
The PIC16LC58B-04/SO suits cost-driven consumer products such as remote-control keyfobs, simple toys, LED decorations, and battery-powered novelty items where every cent of BOM cost matters. The 'LC' CMOS process delivers microamp-range quiescent current, extending battery life when the MCU sleeps between interrupts. The 3 KB OTP holds small control sequences including IR transmit patterns and blink loops. The 18-SOIC package is hand-solderable for low-volume maker products but most consumer runs use wave or reflow soldering. Source: Microchip PIC16LC5X low-power design application note.
Recommended
Battery-Powered Instrumentation
In battery-powered instruments (handheld thermometers, simple timers, weather-station sensor nodes) the PIC16LC58B-04/SO's low-power CMOS 'LC' process and wide 2.5 V minimum supply let it run directly from 2x AA cells down to depletion. The watchdog timer and external interrupt wakeup enable duty-cycled sleep modes drawing microamps between measurements, dramatically extending battery life. The 4 MHz instruction cycle is fast enough to perform temperature conversion and LCD refresh tasks, and the 12 I/O pins drive segment LCDs via bit-banging or simple charlieplexed LEDs. Source: Microchip PIC16LC5X low-power design application note (TB040).
Recommended
Educational and Development Boards
The PIC16LC58B-04/SO is often found on low-cost microcontroller training kits and educational boards because its simple PIC16C5X architecture has only 33 instructions, making it ideal for teaching assembly programming and embedded fundamentals. The 18-SOIC package fits standard DIP-adapter boards, and the wide supply range lets students power the board from USB or bench supplies. The OTP memory limitation is a teaching moment in itself - illustrating one-time programming trade-offs versus flash. The PIC16LC558-04I/SO flash equivalent lets the same board support both OTP and flash labs. Source: Microchip PIC16C5X datasheet architecture overview.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC58B-04/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC58B-04I/SO | PIC16C58B-04/SO | PIC16LC58BT-04/SO | PIC16LC558-04I/SO | PIC16LC558T-04/SO | PIC16LC554T-04/SO |
|---|---|---|---|---|---|---|---|
| Package | 18-SOIC (0.300 inch) | 18-SOIC (0.300 inch) - same | 18-SOIC (0.300 inch) - same | 18-SOIC (0.300 inch) - same | 18-SOIC (0.300 inch) - same | 18-SOIC (0.300 inch) - same | 18-SOIC (0.300 inch) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 8 KB Flash | 8 KB Flash | 1 KB OTP |
| Data RAM | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 137 bytes | 137 bytes | 80 bytes |
| Max Clock Speed | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Supply Voltage | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 3.0 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 5.5 V | 2.5 V to 5.5 V | 2.5 V to 6.25 V |
| Operating Temperature | 0C to +70C (Commercial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) |
| Memory Type | OTP (one-time programmable) | OTP | OTP | OTP | Flash (reprogrammable) | Flash (reprogrammable) | OTP |
Key Differentiators
- Industrial temperature range drop-in option within same 18-SOIC footprint (vs PIC16LC58B-04I/SO)
- Flash-based in-circuit reprogrammability in same 18-SOIC footprint (vs PIC16LC558-04I/SO)
- Same-generation alternative with C-process (slightly different supply range) (vs PIC16C58B-04/SO)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 14) with a short, wide trace to the VSS ground pin (pin 5). For battery-powered designs, add a 10 uF bulk capacitor near the MCU to handle transient current spikes when the oscillator starts. The PIC16LC58B-04/SO's wide 2.5 V-6.25 V supply range tolerates direct 3.3 V or 5 V regulated rails without level translation. Estimated: at 4 MHz and 5 V supply, typical operating current is approximately 1-2 mA; sleep mode drops to microamp range.
The 18-SOIC package (0.300 inch body width) requires standard SOIC-18 land patterns per JEDEC MS-013. Route MCLR (pin 4) with a short trace and provide either a 10 kohm pull-up to VDD or direct connection to VDD per application. If in-circuit programming is desired, route MCLR/VPP, RB6 (clock) and RB7 (data) to an ICSP header per Microchip programming specifications. Avoid long parallel traces on the upper 8-bit Port B bus to minimize crosstalk when driving inductive loads.
Do not assume the PIC16LC58B-04/SO is in-circuit programmable - it is OTP and requires a device programmer before PCB mounting. For designs requiring firmware updates in the field, choose the flash-based PIC16LC558-04I/SO in the same 18-SOIC package. Also note that the PIC16C5X architecture has only a two-level hardware stack - do not write deeply nested subroutines, or use a software-emulated stack. Finally, the '04' suffix means 4 MHz max - do not clock this part with a 10 or 20 MHz crystal.
Compliance Information
RoHS, REACH, lead-free and halogen-free status were not specified in the verified web data - set to unknown per data authenticity rules. AEC-Q100 is not_qualified for the commercial-grade PIC16LC58B-04/SO; the PIC16LC58B-04I/SO industrial variant may be qualified for some automotive programs but verification required at design-in.
