PIC16C58BT-20E/SO - 8-Bit 20MHz 3KB OTP MCU 18-SOIC | Microchip
MPN: PIC16C58BT-20E/SO ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $2.97 | $29.70 |
| 100 | $2.18 | $218.00 |
| 500 | $1.62 | $810.00 |
| 1,000 | $1.21 | $1,210.00 |
PIC16C58BT-20E/SO Overview
An 8-bit OTP microcontroller is a low-cost, high-performance CMOS processor that integrates CPU core, program memory, working RAM, and digital I/O on a single die. OTP memory allows the device to be programmed exactly once after manufacture using a device programmer, making these parts ideal for high-volume, cost-sensitive products where firmware has stabilized. The PIC16C5X family, of which PIC16C58B is a member, uses a 12-bit wide instruction word delivering 2:1 code compression over competitive 8-bit microcontrollers.
Key features include 12 I/O pins supporting digital input and output, a RISC architecture with 33 single-word instructions and 2 instruction cycle decoder, a wide 3.0V to 5.5V operating voltage range, and a hardware reset vector. The internal oscillator and timer architecture support simple embedded control loops without external crystal in many applications, reducing BOM cost. The PIC16C58B delivers up to 20MHz instruction throughput, translating to approximately 5 MIPS performance for tight control loops.
The 12-bit instruction width and Harvard architecture separate program and data memory paths, allowing simultaneous fetch and execute. 73 bytes of general-purpose RAM accommodate small data sets for sensor monitoring, simple user interfaces, and basic state machines. With 12 I/O pins arranged on an 18-pin SOIC footprint, the device fits compact PCB layouts while retaining sufficient I/O for switching, sensing, and indicator control.
Typical applications include automotive body controllers, appliance control boards, security and access control panels, simple LED lighting controllers, battery chargers, and industrial sensor interfaces. The extended temperature grade (-40°C to +125°C) makes this part specifically suited to under-hood automotive modules, outdoor HVAC controls, and factory-floor sensor conditioning. The OTP memory model suits high-volume production runs where firmware revisions are infrequent and BOM cost dominates.
When designing with this device, ensure the operating voltage falls within 3.0V to 5.5V and respect the absolute maximum ratings. Programming must occur before PCB assembly using a Microchip-compatible device programmer; OTP parts cannot be reprogrammed. Designers migrating to flash-based parts should consider PIC16F58 or PIC16F182x family replacements that share similar peripheral architecture.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the bare manufacturer datasheet. Engineers can use the comparison_table to verify pin-compatible drop-in choices before committing to a PCB revision.
Drop-in alternatives for PIC16C58BT-20E/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-20E/SO (same form factor and footprint) — differing in Program Memory Size, Program Memory Type, Package, Architecture, Core.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
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 ⚠️ 参数待验证✓ In Stock
$3.12 / Unit
View Datasheet →PIC16C58B-20/SO
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →PIC16C58BT-04E/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.72 / Unit
View Datasheet →PIC16C58BT-20E/SO Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Series | PIC® 16C |
| Core | PIC |
| Core Size | 8-Bit |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3KB (2K x 12) |
| RAM Size | 73 bytes |
| Maximum Clock Frequency | 20 MHz |
| Operating Voltage Range | 3.0 V to 5.5 V |
| Number of I/O Pins | 12 |
| Number of Timers | 1 (8-bit) |
| Package | 18-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40°C to +125°C (Extended grade, "E" suffix) |
| Instruction Set | 33 instructions, 12-bit wide |
| Architecture | RISC, Harvard |
PIC16C58BT-20E/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 | RB0/INT — Bidirectional I/O pin, Port B bit 0, external interrupt |
| Pin 4 | RB1 — Bidirectional I/O pin, Port B bit 1 |
| Pin 5 | RB2 — Bidirectional I/O pin, Port B bit 2 |
| Pin 6 | RB3 — Bidirectional I/O pin, Port B bit 3 |
| Pin 7 | RB4 — Bidirectional I/O pin, Port B bit 4 |
| Pin 8 | RB5 — Bidirectional I/O pin, Port B bit 5 |
| Pin 9 | RB6 — Bidirectional I/O pin, Port B bit 6 |
| Pin 10 | RB7 — Bidirectional I/O pin, Port B bit 7 |
| Pin 11 | VSS — Ground reference |
| Pin 12 | OSC1/CLKIN — Oscillator input / external clock input |
| Pin 13 | OSC2/CLKOUT — Oscillator output / clock output |
| Pin 14 | VDD — Positive supply voltage (3.0V to 5.5V) |
| Pin 15 | RA0 — Bidirectional I/O pin, Port A bit 0 |
| Pin 16 | RA1 — Bidirectional I/O pin, Port A bit 1 |
| Pin 17 | RA3/MCLR — Master Clear (reset) input, active low |
| Pin 18 | RA4/T0CKI — Bidirectional I/O pin, Port A bit 4, Timer0 clock input |
Typical Applications
PIC16C58BT-20E/SO is suitable for 7 applications: Automotive Body Control Module, Appliance Control Board, Security and Access Control Panel, LED Lighting Controller, Battery Charger Controller, Industrial Sensor Interface Module, Toy and Hobby Electronics.
Automotive Body Control Module
The PIC16C58BT-20E/SO suits automotive body and chassis modules that demand extended temperature operation and tight BOM cost control. Its -40C to +125C extended grade, established by the "E" suffix, allows deployment in under-hood and cabin environments where temperatures swing dramatically. The 20MHz RISC core delivers up to 5 MIPS, enough to scan multiple switch contacts, drive relay coils, and sequence window/liftgate/lighting loads. The 12 I/O pins support 6-10 input channels (switches, sensors) and 2-6 output channels (relay drivers, LED indicators). Its 3KB OTP memory suits stable production firmware for door modules, seat controllers, and mirror adjusters. Placed between 12V battery (post-regulation to 5V) and the load drivers, the device replaces discrete transistors with a programmable state controller.
Recommended
Appliance Control Board
The PIC16C58BT-20E/SO fits white-goods appliance controllers including washing machines, dishwashers, and microwave ovens where cost-optimized 8-bit processing suffices. The 33-instruction RISC core runs simple state machines for cycle sequencing, sensor polling, and user-interface LED control. The 73-byte RAM accommodates parameter storage for cycle counters and timing accumulators. With 12 I/O, the part interfaces with rotary encoders, pushbuttons, buzzer drivers, triac outputs, and tri-color status LEDs. The extended temperature grade supports hot environments near heating elements and motor housings. Placed between a 5V regulator and the front-panel logic, the MCU replaces dozens of 74HC-series logic gates with a single programmable device. Production volumes typically exceed 100K units, where the OTP memory model eliminates per-unit programming costs of flash parts.
Recommended
Security and Access Control Panel
The PIC16C58BT-20E/SO handles security keypad scanning, door sensor monitoring, and alarm relay control in commercial access panels. Its 20MHz instruction cycle scans a 4x4 matrix keypad at well above 100Hz without dropping presses, while leaving CPU bandwidth for code-lock validation, EEPROM emulation, and buzzer/LED output control. The 12 I/O pins accept 8 keypad rows/columns plus 4 status/alarm outputs. OTP memory suits deployed security installations where firmware is frozen and tamper resistance matters. The -40C to +125C temperature range supports outdoor intercom stations and unheated warehouses. Placed on the panel PCB between the 5V rail and the keypad/siren, this MCU replaces commercial keypad controllers at one-fifth the cost.
Recommended
LED Lighting Controller
The PIC16C58BT-20E/SO drives multi-channel LED controllers for architectural and decorative lighting installations where firmware is stable. Its 20MHz RISC core generates precise PWM outputs for color-mixing RGB fixtures, while the 73-byte RAM stores sequence patterns and fade profiles. The 12 I/O support 3-6 LED channels and accepts DMX-style or pushbutton user inputs. OTP memory suits high-volume decorative products where BOM cost dominates. The extended temperature range covers outdoor fixtures in desert and arctic installations. Placed between the 5V regulator and MOSFET LED drivers, the MCU replaces analog PWM ICs with a programmable sequencer.
Recommended
Battery Charger Controller
The PIC16C58BT-20E/SO manages charge profiles in single-cell and multi-cell lead-acid, Ni-Cd, and Ni-MH charger products where firmware is finalized. Its 20MHz core samples voltage and current at high enough rates to terminate charge at the correct knee without overcharge damage. The 12 I/O handle voltage sense, current sense, relay/MOSFET gate drive, and LED status. OTP memory locks the charge algorithm into the part, preventing field modification. The extended temperature range supports automotive and outdoor charging installations. Placed between the 5V logic rail and the power-FET gate drivers, this MCU replaces analog charge controllers with adaptive digital profiles.
Recommended
Industrial Sensor Interface Module
The PIC16C58BT-20E/SO reads analog and digital sensors on factory-floor modules that must operate reliably in high-temperature, high-EMI environments. Its -40C to +125C extended temperature grade tolerates motor-cabinet and outdoor substation conditions. The 20MHz core polls sensor inputs at adequate rates for vibration, temperature, and pressure monitoring loops. The 73-byte RAM stores calibration constants and rolling averages. With 12 I/O, the MCU accepts 4-8 sensor inputs and drives 4-8 indicator outputs or relays. OTP memory prevents unauthorized firmware modification in the field. Placed between the 24V-to-5V regulator and the sensor signal conditioning circuitry, the MCU replaces PLC cards at one-tenth the cost for simple sensor-only modules.
Recommended
Toy and Hobby Electronics
The PIC16C58BT-20E/SO powers high-volume hobby products, educational kits, and toy controllers where firmware is finalized and unit cost dominates. Its 3KB OTP holds simple sound sequences, motor patterns, and button-input state machines without field reprogrammability, which is a feature in toys to prevent firmware piracy. The 12 I/O drive motors, LEDs, and accept user input. The -40C to +125C extended temperature supports outdoor and rough-handling environments. Placed between battery regulation and load drivers, this MCU replaces discrete logic with a programmable controller at sub-dollar pricing.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C58BT-20E/SO — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C58B-20E/SO | PIC16C58B-20I/SO | PIC16C58BT-20I/SO | PIC16C58B-20/SO | PIC16C58B-20E/P | PIC16C58BT-04E/SO |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-SOIC | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | 18-SOIC - same | PDIP-18 - different | 18-SOIC - same |
| Program Memory | 3KB OTP | 3KB OTP | 3KB OTP | 3KB OTP | 3KB OTP | 3KB OTP | 3KB OTP |
| Max Clock Frequency | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 20 MHz | 4 MHz |
| Operating Temperature | -40C to +125C (Extended) | -40C to +125C | -40C to +85C (Industrial) | -40C to +85C | 0C to +70C (Commercial) | -40C to +125C | -40C to +125C |
| RAM | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- Extended temperature grade (-40C to +125C) (vs PIC16C58B-20/SO)
- 20MHz instruction throughput for tight control loops (vs PIC16C58BT-04E/SO)
- Tape and Reel packaging for automated assembly (vs PIC16C58B-20E/SO)
Design Notes
Operating voltage is 3.0V to 5.5V. Place a 100nF decoupling capacitor within 5mm of the VDD pin (pin 14) and a bulk capacitor (10uF tantalum or 22uF aluminum) at the regulator output to suppress switching noise from relays, motors, and LED strings. For automotive 12V battery applications, use an LM7805 or switching pre-regulator to step 12V down to 5V before the MCU rail; do not connect the MCU directly to the battery.
PIC16C58B OTP memory cannot be erased or rewritten after programming. Program the device with a Microchip-compatible device programmer (PICSTART Plus, MPLAB PM3, or compatible third-party tools) before PCB assembly; in-circuit programming is not supported on this OTP family. If field upgrades are required, migrate to PIC16F58 or PIC16F182x flash-based replacements that share the 18-pin SOIC footprint but offer in-system programmability via ICSP.
Keep the OSC1/OSC2 crystal or resonator traces short (under 10mm) and routed away from I/O switching lines to avoid injecting clock noise into sensor inputs. The MCLR reset pin (pin 17) requires a 10kohm pull-up to VDD; add a 100nF capacitor to ground if the reset line is exposed externally to provide ESD protection. Place guard traces around the oscillator section if the PCB operates near high-current switching nodes.
Estimated: At maximum 20MHz clock and 5V supply, the PIC16C58BT-20E/SO draws approximately 5mA active current, dissipating 25mW worst-case. The 18-SOIC package has a thermal resistance of approximately 100 C/W, giving a junction temperature rise of 2.5C above ambient at full load - well within the -40C to +125C operating range. No heatsink is required.
Compliance Information
RoHS, REACH, lead-free, halogen-free, and conflict-minerals status are not explicitly stated in the verified web data for this NRND part. Engineers should request the latest material declaration from Microchip for compliance-critical applications. AEC-Q100 is not applicable - PIC16C58B family predates automotive-grade qualification requirements; automotive users should verify through Microchip's automotive product line.
