PIC16C58B-04I/P - 8-Bit 4MHz OTP MCU 18-PDIP | Microchip
MPN: PIC16C58B-04I/P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.95 | $2.95 |
| 10 | $2.65 | $26.50 |
| 100 | $2.35 | $235.00 |
| 500 | $2.1 | $1,050.00 |
| 1,000 | $1.88 | $1,880.00 |
PIC16C58B-04I/P Overview
What is a PIC16C5X microcontroller? The PIC16C5X is Microchip's entry-level 8-bit RISC microcontroller family, employing a Harvard architecture with a 12-bit instruction word and an 8-bit data path. It executes 33 single-word, single-cycle instructions, giving it a 2:1 code compression advantage over competing 8-bit microcontrollers in its class. The family sits below PIC16F and PIC18 in the Microchip hierarchy, targeting cost-sensitive embedded control applications where deterministic timing and small footprint dominate over computational throughput.
Key features include a two-level deep hardware stack, direct/indirect/relative addressing modes, an 8-bit real-time clock/counter (TMR0) with programmable prescaler, and a watchdog timer for reliable standalone operation. Power consumption is minimized via SLEEP mode with wake-on-pin-change, and the device operates from 3.0V to 5.5V across the industrial -40C to +85C temperature range. The 'I' suffix denotes the industrial temperature grade.
The PIC16C58B uses CMOS EPROM technology with 12-bit wide instructions and 8-bit wide data, achieving performance an order of magnitude higher than competitors in the same price category. Its OTP program memory is one-time programmable (not re-programmable in-circuit), distinguishing it from later flash-based PIC16F variants. The architecture is fully static, allowing the clock to be stopped without losing register contents.
Typical applications include low-cost consumer appliances, remote controls, toy and hobby electronics, simple sensor interfaces, LED driving and lighting controllers, security keypads, and battery-powered devices. Designers select this part when determinism, small code size, and aggressive cost matter more than abundant peripherals.
When designing with the PIC16C58B-04I/P, ensure the OTP programming step is integrated into the production flow - field firmware updates are not possible. Add a 100 nF decoupling capacitor adjacent to VDD and use the MCLR pin reset configuration with the internal pull-up enabled to reduce external component count.
This page synthesizes distributor availability, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
Drop-in alternatives for PIC16C58B-04I/P — 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 PIC16C58B-04I/P (same form factor and footprint) — differing in Package, Program Memory Type, Watchdog Timer, Timers, Instruction Set.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C58B-04/P
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16C58B-20I/P
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F57-04I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C57C-04I/P
✅ Drop-In✓ In Stock
$2.05 / Unit
View Datasheet →PIC16C58B-04I/P Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC RISC (Harvard) |
| Family | PIC16C5X |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3 KB (2K x 12) |
| RAM | 73 bytes |
| Maximum Clock Frequency | 4 MHz |
| Operating Voltage Range | 3.0 V to 5.5 V |
| Number of I/O Pins | 12 |
| Number of Timers | 1 (TMR0, 8-bit) |
| Instruction Word Width | 12 bits |
| Number of Instructions | 33 (single-word, single-cycle) |
| Hardware Stack Depth | 2 levels |
| Watchdog Timer | Yes |
| Operating Temperature Range | -40 C to +85 C (Industrial) |
| Package Type | 18-pin PDIP (300 mil, through-hole) |
| Pin/Package Code | /P (PDIP, industrial temp) |
PIC16C58B-04I/P Pin Configuration
| Pin 1 | RA2 — Bidirectional digital I/O / port A bit 2 |
| Pin 2 | RA3 — Bidirectional digital I/O / port A bit 3 |
| Pin 3 | RTCC — TMR0 real-time clock/counter input (schmitt trigger) |
| Pin 4 | MCLR — Master Clear reset input (active low) |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional digital I/O / port B bit 0 |
| Pin 7 | RB1 — Bidirectional digital I/O / port B bit 1 |
| Pin 8 | RB2 — Bidirectional digital I/O / port B bit 2 |
| Pin 9 | RB3 — Bidirectional digital I/O / port B bit 3 |
| Pin 10 | RB4 — Bidirectional digital I/O / port B bit 4 |
| Pin 11 | RB5 — Bidirectional digital I/O / port B bit 5 |
| Pin 12 | RB6 — Bidirectional digital I/O / port B bit 6 |
| Pin 13 | RB7 — Bidirectional digital I/O / port B bit 7 |
| Pin 14 | VDD — Positive supply voltage (3.0V to 5.5V) |
| Pin 15 | OSC2 — Oscillator output / clock out |
| Pin 16 | OSC1 — Oscillator input / external clock in |
| Pin 17 | RA0 — Bidirectional digital I/O / port A bit 0 |
| Pin 18 | RA1 — Bidirectional digital I/O / port A bit 1 |
Typical Applications
PIC16C58B-04I/P is suitable for 6 applications: Consumer Appliance Controllers, Remote Control Transmitters, Toys and Hobby Electronics, Security Keypads and Access Control, Battery-Powered Sensor Interfaces, LED Lighting Controllers.
Consumer Appliance Controllers
The PIC16C58B-04I/P's 3 KB OTP program memory, 12 digital I/O pins, and sub-US$2 unit cost make it ideal for high-volume consumer appliance controllers such as microwave ovens, washing machines, and air conditioners. Its 4 MHz / 4 MIPS throughput comfortably handles keypad scanning, relay driving, and triac phase-control loops for motor and heater regulation. The 33 single-cycle RISC instructions execute deterministically with no pipeline stalls, simplifying real-time interrupt handling for safety-critical sensor monitoring (door switches, over-temperature, water level). Industrial -40C to +85C temperature rating supports laundry-room and kitchen thermal extremes.
Recommended
Remote Control Transmitters
The PIC16C58B-04I/P is well-suited to IR/RF remote control transmitters where deterministic response and ultra-low standby current matter more than computational throughput. The TMR0 counter with programmable prescaler generates accurate carrier frequencies (38 kHz, 40 kHz, 56 kHz) without CPU intervention, freeing the core for protocol stack handling. SLEEP mode with wake-on-pin-change drops current to microampere levels, extending battery life across multi-year service intervals. The 12-bit instruction word compresses NEC, RC5, and Sony SIRC protocol code into under 1 KB, leaving headroom for custom command sets.
Recommended
Toys and Hobby Electronics
The PIC16C58B-04I/P's aggressive cost point and OTP memory make it the canonical choice for mass-produced toy and hobby electronics where per-unit BOM savings dominate BOM decisions. The 12 high-current (20 mA) I/O pins drive LEDs, buzzers, and small DC motors directly without external transistor arrays, simplifying PCB layout for small form-factor designs. Random-number and pseudorandom-sequence generation fit easily in the 3 KB program space for game-logic toys. Industrial temperature rating tolerates the thermal stress of enclosed battery compartments and warm-climate shipping conditions.
Recommended
Security Keypads and Access Control
For PIN-style security keypads and low-end access-control panels, the PIC16C58B-04I/P delivers deterministic keypad-debounce and code-verification logic without the cost or complexity of a full Cortex-M0 design. The hardware 2-level stack suffices for single-function keypad firmware, and 73 bytes of RAM accommodates multi-digit PIN buffers plus scan state. Watchdog timer prevents lockup from ESD or power-line transients on outdoor keypads. The 4 MIPS throughput handles 50 ms matrix-scan cycles with margin for EEPROM emulation of PIN storage and tamper logging.
Recommended
Battery-Powered Sensor Interfaces
The PIC16C58B-04I/P's 3.0V to 5.5V operating range and SLEEP-mode microampere current make it appropriate for battery-powered sensor interfaces including temperature loggers, soil-moisture probes, and low-rate wireless sensor nodes. TMR0 with watchdog wakes the device on timer overflow or external pin change, supporting multi-year battery life on 2x AA cells. The fully-static CMOS core allows the oscillator to be gated off completely between measurements. 12 I/O pins read multiple analog sensors via external ADC chips driven by GPIO, since the PIC16C58B lacks on-chip ADC.
Recommended
LED Lighting Controllers
The PIC16C58B-04I/P's 20 mA per-pin drive capability and PWM generation via TMR0 interrupt make it a strong fit for decorative LED lighting controllers, status-indicator panels, and low-channel architectural lighting. Its deterministic instruction timing produces glitch-free PWM at audio-bypass frequencies above 20 kHz, eliminating audible coil whine in inductive LED driver circuits. 3 KB program space stores multi-pattern sequences and dimming curves. Industrial temperature grade supports outdoor enclosure operation across seasonal temperature swings.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C58B-04I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C58B-04/P | PIC16C58B-20I/P | PIC16F57-04I/P | PIC16C57C-04I/P |
|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-pin PDIP (300 mil) | 18-pin PDIP (300 mil) - same | 18-pin PDIP (300 mil) - same | 18-pin PDIP (300 mil) - same | 18-pin PDIP (300 mil) - same |
| Program Memory | 3 KB OTP EPROM | 3 KB OTP EPROM | 3 KB OTP EPROM | 3 KB Flash | 2 KB OTP EPROM |
| Maximum Clock | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| Temperature Range | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) |
| RAM | 73 bytes | 73 bytes | 73 bytes | 72 bytes | 72 bytes |
| I/O Pins | 12 | 12 | 12 | 12 | 12 |
| Memory Type | OTP (one-time programmable) | OTP | OTP | Flash (reprogrammable) | OTP |
| ICSP Support | No | No | No | Yes | No |
Key Differentiators
- Lowest unit cost in 8-bit MCU category with industrial temperature grade (vs PIC16F57-04I/P)
- Industrial -40C to +85C temperature range available in stock (vs PIC16C58B-04/P)
- 12-bit instruction width delivers 2:1 code compression vs 8-bit MCUs (vs Atmel ATtiny25 (AVR core))
- 33 single-cycle RISC instructions with deterministic timing (vs MCS-51 (8051) variants)
Design Notes
Place a 100 nF decoupling capacitor as close as physically possible to the VDD pin (pin 14) with the ground return to VSS (pin 5) via a short, low-inductance trace. For designs with high-noise switching loads (relays, solenoids), add a 10 uF bulk capacitor on the VDD rail near the MCU. The PIC16C58B-04I/P power-on-reset (POR) and brown-out behaviour depend on stable VDD rise times; add a 100 kohm pull-up on MCLR (pin 4) to VDD to enable internal reset, or drive MCLR from an external supervisor for designs where VDD may have slow or noisy ramp.
For a 4 MHz crystal or ceramic resonator, connect it between OSC1 (pin 16) and OSC2 (pin 15) with two 22-33 pF load capacitors to ground, sized per the crystal manufacturer's CL specification. For RC oscillator mode (cost-optimized designs), connect a resistor from OSC1 to VDD and a capacitor from OSC1 to ground; frequency tolerance is wider (~5-10%) compared to crystal mode. The fully-static CMOS core allows the oscillator to be stopped without losing register state, enabling SLEEP-mode wake-on-pin-change for battery applications.
OTP program memory cannot be erased or rewritten - verify firmware with a PIC16C58B prototype windowed (JW) package or PIC16F57 Flash equivalent before committing to OTP production programming. Watchdog timer is disabled by default; enable WDT in the OPTION register for any application where software lockup could create safety or operational hazards. The 2-level hardware stack means no more than 2 nested subroutine calls are supported - restructure deep call chains into iterative loops or state machines to avoid stack overflow.
The 18-pin PDIP footprint uses standard 0.1 inch (2.54 mm) pitch through-hole pads - compatible with perf-board, breadboard, and conventional hand-soldering workflows. Keep analog and digital ground returns separate when interfacing external ADCs, joining them only at a single star-point near the MCU VSS pin. The 20 mA per-pin drive capability allows direct LED connection through a current-limit resistor (e.g., 220 ohm for 5V supply and ~10 mA LED current), but do not source or sink more than 100 mA total across all I/O pins per the datasheet's absolute-maximum ratings.
Compliance Information
RoHS and REACH compliant per Microchip product declaration. Not AEC-Q100 qualified (consumer/industrial grade). Lead-free and halogen-free packaging.
