PIC16C58BT-20/SO - 8-Bit 20MHz OTP MCU 3KB | Microchip
MPN: PIC16C58BT-20/SO ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.2 | $3.20 |
| 10 | $2.95 | $29.50 |
| 100 | $2.62 | $262.00 |
| 500 | $2.31 | $1,155.00 |
| 1,000 | $2.05 | $2,050.00 |
PIC16C58BT-20/SO Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory, data RAM, and I/O peripherals. In the system hierarchy, it sits below 16-bit and 32-bit MCUs but above discrete logic ICs. OTP microcontrollers like the PIC16C58B are programmed once with the application code and cannot be re-flashed, making them a low-cost fit for high-volume, stable-firmware products where in-field updates are not required.
Key features include 12 bidirectional I/O pins, a 12-bit instruction word optimized for compact code, an internal watchdog timer, power-on reset, and an operating voltage range of approximately 3.0V to 5.5V typical for the PIC16C5X family. The 20 MHz clock enables up to 5 MIPS throughput, and the device supports commercial temperature grade operation. OTP EPROM memory reduces per-unit cost versus flash parts, while the SOIC-18 package is suitable for automated surface-mount assembly on standard 300-mil boards.
The PIC16C58B uses Microchip's classic 12-bit RISC core with a 33-instruction set, 2-level hardware stack, and Harvard architecture that separates program and data buses for deterministic instruction fetch. The device integrates 73 bytes of general-purpose RAM, 8-bit timer/counter, and an internal oscillator option depending on the configuration, providing sufficient peripherals for simple control tasks.
Typical applications include appliance controllers, low-end remote controls, lighting ballasts, simple sensor signal conditioning, and other cost-sensitive embedded systems where deterministic 8-bit performance and OTP code storage are advantageous. The wide SO-18 footprint and Microchip's well-documented development toolchain (MPLAB, MPASM) accelerate time-to-market for engineers familiar with the PIC architecture.
When designing with this device, ensure the ICSP programming interface is accessible before final board assembly because OTP memory cannot be re-programmed after packaging. Decoupling capacitors (typically 100 nF plus a bulk 10 uF) should be placed as close as possible to VDD and VSS pins to suppress switching noise.
This page synthesizes distributor pricing, drop-in cross-family alternatives, and practical design notes not found in a standalone datasheet excerpt, helping engineers source and apply the PIC16C58BT-20/SO confidently.
Drop-in alternatives for PIC16C58BT-20/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 PIC16C58BT-20/SO (same form factor and footprint) — differing in Core Architecture, Program Memory Size, Program Memory Type, Package, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C58B-20/SO
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16C58B-20E/SO
✅ Drop-In✓ In Stock
$1.85 / Unit
View Datasheet →PIC16C58B-20I/SO
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C58BT-20I/SO
✅ Drop-In✓ In Stock
$3.12 / Unit
View Datasheet →PIC16C57C-20/SO
✅ Drop-In✓ In Stock
$2.89 / Unit
View Datasheet →PIC16C57T-10/SO
✅ Drop-In✓ In Stock
$2.45 / Unit
View Datasheet →PIC16C58BT-20/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16C RISC |
| Family | PIC16C5X |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3 KB (2K x 12) |
| RAM | 73 bytes |
| Maximum Clock Frequency | 20 MHz |
| Instruction Throughput | Up to 5 MIPS |
| I/O Pins | 12 |
| Number of Pins | 18 |
| Package | 18-SOIC (SO, 0.295" / 7.50 mm body width) |
| Mounting Type | Surface Mount (gull-wing) |
| Supply Voltage | 4.5 V to 5.5 V (typical PIC16C5X range) |
| Temperature Grade | Commercial |
| Instruction Set | 33 instructions, 12-bit word |
| Stack | 2-level |
| Watchdog Timer | Yes |
| Power-On Reset | Yes |
PIC16C58BT-20/SO Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pin 3 | RA4/T0CKI — Bidirectional I/O port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR — Master Clear (reset) input, active low |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0/INT — Bidirectional I/O port B bit 0 / External interrupt |
| Pin 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7 |
| Pin 14 | VDD — Positive supply voltage |
| Pin 15 | OSC2/CLKOUT — Oscillator output / Clock out |
| Pin 16 | OSC1/CLKIN — Oscillator input / Clock in |
| Pin 17 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 18 | RA1 — Bidirectional I/O port A bit 1 |
Typical Applications
PIC16C58BT-20/SO is suitable for 6 applications: Appliance Control Boards, Low-End Remote Controls, Lighting Ballasts and LED Drivers, Simple Sensor Signal Conditioning, Toys and Consumer Gadgets, Industrial Timer and Counter Modules.
Appliance Control Boards
The PIC16C58BT-20/SO fits appliance control boards where deterministic 8-bit control and 12 I/O pins are sufficient and OTP cost reduction matters. Its 20 MHz clock delivers 5 MIPS throughput, enough to scan key matrices, drive LED or relay outputs, and run simple PI control loops on washing machines, dishwashers, and microwave ovens. The 3KB OTP memory holds fixed firmware with no in-field updates required.
Recommended
Low-End Remote Controls
In infrared or RF remote controls, the PIC16C58BT-20/SO provides just enough MIPS to encode timing-critical protocols (RC5, NEC, proprietary) while its 12 I/O lines support a key matrix, IR LED driver, and status indicator. OTP programming locks firmware at production for lowest unit cost, and the SOIC-18 footprint fits inside the slimmest handheld enclosures.
Recommended
Lighting Ballasts and LED Drivers
Lighting ballasts for fluorescent or LED luminaires use the PIC16C58BT-20/SO to run dimming and power-factor control loops. The 20 MHz clock allows accurate zero-crossing detection at 50/60 Hz mains while executing control-law math, and the 12 I/O pins drive PFC switch signals, dimmer interfaces, and fault indicators. OTP locking prevents field tampering with safety-critical firmware.
Recommended
Simple Sensor Signal Conditioning
Sensor front-end modules use the PIC16C58BT-20/SO to read analog or digital sensors, apply linearization, and drive 4-20 mA or PWM outputs. The 12-bit instruction width and 73-byte RAM handle modest calibration tables, and the 20 MHz speed supports 10-bit ADC-equivalent oversampling for noise reduction on slow sensor signals.
Recommended
Toys and Consumer Gadgets
Cost-sensitive toys and consumer gadgets rely on the PIC16C58BT-20/SO's low unit cost and tiny SOIC-18 footprint. The 12 I/O pins drive motors, sound chips, LEDs, and IR receivers while the 3KB OTP stores sound-pattern lookup tables and simple animation sequences. OTP locks the firmware to prevent competitive cloning in high-volume SKUs.
Recommended
Industrial Timer and Counter Modules
Industrial timer modules use the PIC16C58BT-20/SO for precise timing/counting functions because its 20 MHz clock supports microsecond-resolution timing while 12 I/O pins drive relays, displays, and encoder inputs. OTP memory ensures field firmware integrity, and the commercial temperature grade suffices for control-panel environments. The watchdog timer adds safety against code-flow faults.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C58BT-20/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C58B-20/SO | PIC16C58B-20E/SO | PIC16C58B-20I/SO | PIC16C58BT-20I/SO | PIC16C57C-20/SO | PIC16C57T-10/SO |
|---|---|---|---|---|---|---|---|
| Package | 18-SOIC (SO) | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same | 18-SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory | 3 KB (2K x 12) OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 2 KB OTP (-33%) | 2 KB OTP (-33%) |
| RAM | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 72 bytes (-1.4%) | 72 bytes (-1.4%) |
| Maximum Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 10 MHz (-50%) |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Temperature Grade | Commercial | Commercial | Extended | Industrial | Industrial | Commercial | Commercial |
| Program Memory Type | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM | OTP EPROM |
Key Differentiators
- Tape-and-reel packaging for high-volume SMT assembly (vs PIC16C58B-20/SO)
- Commercial temperature grade for cost-sensitive consumer products (vs PIC16C58B-20I/SO)
- 3 KB program memory versus smaller PIC16C57 alternatives (vs PIC16C57C-20/SO)
Design Notes
Place a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (14) and VSS pin (5) to suppress high-frequency switching noise. Add a bulk 10 uF tantalum or aluminum electrolytic capacitor on the supply rail near the MCU for transient loads. The PIC16C58BT-20/SO operates from a typical 4.5 V to 5.5 V supply; operation below 4.5 V can compromise EPROM program memory retention margins and reduce oscillator drive.
Because the PIC16C58BT-20/SO uses One-Time Programmable EPROM, code cannot be re-flashed after packaging. Ensure the ICSP programming header is accessible before conformal coating or potting, and program the device in-circuit on the final PCB or in a socketed programming fixture to avoid production scrap. The MCLR pin (4) must be pulled high through a 10 kohm resistor for normal operation; leaving it floating will cause unreliable resets.
Route the oscillator traces (OSC1 pin 16, OSC2 pin 15) as short as possible and keep them away from high-current switching traces to minimize EMI coupling. If using a crystal, place the load capacitors within 5 mm of the oscillator pins. The SOIC-18 thermal pad is not present on this package, so the device relies on the SOIC leads for thermal conduction; ensure adequate copper pour on VDD and VSS for heat spreading at higher ambient temperatures.
Compliance Information
Lifecycle and detailed compliance data were not present in the verified web snippets for PIC16C58BT-20/SO; AEC-Q100 does not apply because this is a commercial-grade OTP MCU. RoHS status is marked unknown - verify with Microchip or the distributor for the specific date code and packaging format before placing volume orders.
