PIC16C58B-20E/SO - 8-bit 20MHz 3KB OTP MCU | Microchip | SOIC-18
MPN: PIC16C58B-20E/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.45 | $3.45 |
| 10 | $3.1 | $31.00 |
| 100 | $2.62 | $262.00 |
| 500 | $2.21 | $1,105.00 |
| 1,000 | $1.85 | $1,850.00 |
PIC16C58B-20E/SO Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU, memory, and peripherals. The PIC16C5X family sits at the entry-level of 8-bit microcontrollers, descendants of the original PIC architecture that pioneered Harvard-bus RISC design for embedded control. Within the broader taxonomy, the PIC16C58B is a micro-controller -> MCU -> 8-bit MCU -> RISC MCU -> embedded processor -> semiconductor. Its 12-bit wide instruction word delivers 2:1 code compression over competing 8-bit architectures, allowing tight programs to fit in the small OTP memory.
Key features include a fully static design that permits operation down to DC clock, an internal oscillator option, and a programmable code-protection mechanism. The 20 MHz instruction rate yields 5 MIPS peak throughput, while the 33-instruction set simplifies code generation and reduces firmware development time. The wide 20-pin SOIC industrial package provides robust mechanical handling and easy hand-soldering for prototyping.
Typical applications include appliance controls, automotive body electronics (non-safety), security-system sensor interfaces, and industrial machine-control sub-modules. The 12-bit program-word width and 73-byte RAM make the PIC16C58B well-suited for state-machine-driven glue logic where deterministic single-cycle execution replaces discrete logic. Because the device is OTP-based, production programming occurs once per unit.
When designing with this part, allow up to 73 bytes of general-purpose RAM and verify that the chosen oscillator mode (RC, XT, HS, LP) matches the frequency and stability required by the application. Always confirm whether OTP or windowed-EPROM (JW) packaging is appropriate for your firmware-development workflow, as windowed parts cost more and are larger.
Drop-in alternatives for PIC16C58B-20E/SO β 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-20E/SO (same form factor and footprint) β differing in Program Memory Type, Program Memory Size, Core Architecture, I/O Pins, MSL Level.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C58B-20/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C58B-04/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C58B-20I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C58B-04I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C57C-20/SO
β Drop-Inβ In Stock
$2.89 / Unit
View Datasheet βPIC16C56A-20/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C58B-20E/SO Maximum Ratings & Electrical Characteristics
| Family | PIC16C5X |
| Core | 8-bit RISC |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 3 KB (2K x 12) |
| RAM Size | 73 bytes |
| I/O Pins | 12 |
| Maximum Clock Speed | 20 MHz |
| Instruction Set Size | 33 instructions |
| Instruction Width | 12 bits |
| Supply Voltage | 4.5 V to 5.5 V |
| Architecture | Harvard RISC, fully static |
| Package | 18-pin SOIC (SO) |
| Operating Temperature (E suffix) | -40 C to +125 C (extended) |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant |
| Lifecycle Stage | Active |
PIC16C58B-20E/SO Pin Configuration
| Pin 1 | RA2 β Bidirectional I/O port A bit 2 |
| Pin 2 | RA3 β Bidirectional I/O port A bit 3 |
| Pin 3 | RA4/T0CKI β Bidirectional I/O port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR β Master Clear (reset) input, active low |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RB0/INT β Bidirectional I/O port B bit 0 / external interrupt |
| Pin 7 | RB1 β Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 β Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 β Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 β Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 β Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 β Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 β Bidirectional I/O port B bit 7 |
| Pin 14 | VDD β Positive supply voltage (4.5 V to 5.5 V) |
| Pin 15 | OSC2/CLKOUT β Oscillator crystal output / clock output |
| Pin 16 | OSC1/CLKIN β Oscillator crystal input / external clock input |
| Pin 17 | RA0 β Bidirectional I/O port A bit 0 |
| Pin 18 | RA1 β Bidirectional I/O port A bit 1 |
Typical Applications
PIC16C58B-20E/SO is suitable for 6 applications: Appliance Control Boards, Automotive Body Electronics (Non-Safety), Security Sensor Interface Modules, Industrial Machine Sub-Controllers, Consumer Toy and Hobby Electronics, Smart Sensor Edge Nodes.
Appliance Control Boards
The PIC16C58B-20E/SO fits appliance control boards because its 20 MHz instruction rate (5 MIPS) and 12-bit instruction word handle state-machine logic for washers, dryers, and dishwashers while keeping BOM cost minimal. The 3 KB OTP memory accommodates typical wash-cycle and user-interface firmware without external ROM. Its -40 C to +125 C extended temperature range (E suffix) survives the under-cabinet thermal environment of laundry appliances. Placed as the main controller, the PIC16C58B reads keypad inputs, drives triac-controlled motors, and sequences relays. The RISC 33-instruction set simplifies assembly firmware porting from previous PIC16C5X designs. Power dissipation is typically <100 mW at 5 V/20 MHz, eliminating the need for a heatsink on a small PCB.
Recommended
Automotive Body Electronics (Non-Safety)
For non-safety automotive modules such as seat controllers, mirror adjusters, and interior lighting, the PIC16C58B-20E/SO delivers 12 I/O pins and 20 MHz throughput in an 18-pin SOIC package that fits behind the dashboard. The -40 C to +125 C operating range handles cabin and underhood-near temperatures per AEC-Q100-style thermal profiles. Because automotive production volumes are large and program code is locked, OTP memory avoids the per-unit programming overhead of flash parts. The PIC drives relay coils and LED strings via MOSFETs and survives 12 V automotive supply transients with external TVS clamping. Designers should note that safety-critical functions such as airbag or ABS require a more modern PIC with CAN and diagnostics.
Recommended
Security Sensor Interface Modules
The PIC16C58B-20E/SO works well as a security sensor node controller because its 12 I/O pins connect directly to PIR sensors, reed switches, and piezo buzzers while its 20 MHz throughput debounces inputs and timestamps events. The 73-byte RAM buffer accommodates event logs and the 3 KB OTP holds protocol firmware. Power consumption at 5 V is roughly 15-20 mA active, suiting battery-backed alarm panels with a sleeping external watchdog. Place the PIC between the sensor front-end and the RF or wired uplink transmitter. The PIC16C5X deterministic single-cycle execution ensures predictable alarm-trigger latency, critical for intrusion-detection compliance.
Recommended
Industrial Machine Sub-Controllers
On factory-floor PLC expansion modules, the PIC16C58B-20E/SO serves as a low-cost sub-controller that handles keypad scanning, LED multiplexing, and simple PWM fan or pump drives. The 18-pin SOIC format mounts on a small daughter board inside a DIN-rail enclosure. Its 20 MHz clock supports fast SPI or UART communication with a master PLC. The extended -40-125 C temperature grade tolerates cabinet temperatures near motors and heaters. The 3 KB OTP holds typical ladder-logic translation or custom protocols. Engineers can leverage existing PIC16C5X assembly libraries to accelerate firmware development for retrofit installations.
Recommended
Consumer Toy and Hobby Electronics
Toy manufacturers select the PIC16C58B-20E/SO for high-volume consumer products because its OTP program memory locks firmware against cloning while keeping per-unit cost below $2 in 1k quantities. The 12 I/O pins drive servo motors, LEDs, speakers, and IR receivers typical in robotics kits and educational toys. The 20 MHz instruction rate enables smooth servo PWM updates and audio tone generation. The 73-byte RAM supports a few small lookup tables for sound playback. The 18-pin SOIC package is hand-solderable for small-batch and kit markets.
Recommended
Smart Sensor Edge Nodes
The PIC16C58B-20E/SO serves as a pre-processor on industrial sensor edge nodes, where it digitizes analog signals via external ADC, applies digital filtering, and forwards results over UART or SPI to a host processor. Its 5 MIPS throughput runs lightweight moving-average and threshold-detection algorithms on temperature, pressure, or flow sensors. The 12-bit instruction word keeps compiled code compact, fitting the entire DSP-style pipeline into 3 KB OTP. The 18-pin SOIC package simplifies integration on the small sensor-PCB footprint typical of IoT field devices. Combined with an external 25LC040 EEPROM for configuration storage, the node achieves deterministic embedded processing at low BOM cost.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C58B-20E/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C58B-20/SO | PIC16C58B-04/SO | PIC16C58B-20I/SO | PIC16C57C-20/SO | PIC16C56A-20/SO |
|---|---|---|---|---|---|---|
| Package | 18-pin SOIC (SO) | 18-pin SOIC (SO) - same | 18-pin SOIC (SO) - same | 18-pin SOIC (SO) - same | 18-pin SOIC (SO) - same | 18-pin SOIC (SO) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Maximum Clock Speed | 20 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz | 20 MHz |
| Program Memory | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 2 KB OTP | 1 KB OTP |
| RAM Size | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 72 bytes | 25 bytes |
| I/O Pins | 12 | 12 | 12 | 12 | 20 | 12 |
| Operating Temperature | -40 C to +125 C (E) | 0 C to +70 C | 0 C to +70 C | -40 C to +85 C | 0 C to +70 C | 0 C to +70 C |
| Supply Voltage | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V | 4.5 V to 5.5 V |
| Approx. Unit Price (qty 1) | $3.45 | $3.30 | $3.20 | $3.50 | $3.10 | $2.95 |
Key Differentiators
- Extended -40 C to +125 C temperature range (vs PIC16C58B-20/SO)
- Highest-speed variant in the PIC16C58B family (vs PIC16C58B-04/SO)
- Largest program memory in the PIC16C5X family (vs PIC16C56A-20/SO)
Design Notes
Estimated: at VDD=5.0 V and 20 MHz clock, the PIC16C58B-20E/SO draws roughly 15-20 mA active, giving <100 mW dissipation. Place a 100 nF decoupling capacitor as close as possible to the VDD pin and add a 10 uF bulk capacitor near the regulator. The MCLR pin must be pulled to VDD through a 10 kohm resistor with a 100 nF capacitor to ground for proper reset behavior, as required by the Microchip PIC16C5X datasheet.
Keep oscillator traces short and surround them with a ground pour to minimize EMI pickup. For HS mode at 20 MHz, use a fundamental-mode crystal with load capacitors matched to the crystal's specified load capacitance (typically 15-33 pF). Route the OSC1/OSC2 traces symmetrically and avoid running digital signal traces beneath the oscillator area. Place the decoupling capacitor within 3 mm of the VDD pin and provide a low-impedance ground return path.
Do not substitute the PIC16C58B-20E/SO with PIC16F-series flash parts without redesigning the PCB - the pinouts differ on packages other than the 18-pin SOIC. Always verify the temperature grade letter in the suffix (C=commercial, I=industrial, E=extended) against the deployment environment. Code-protect the OTP program memory before mass production to prevent firmware cloning. Also note that the PIC16C5X family has no on-chip debugger interface - use a windowed JW package for development iterations and switch to OTP/SOIC for production.
Compliance Information
RoHS and lead-free compliant per Microchip product page. Not AEC-Q100 qualified - the E temperature grade is extended industrial, not automotive-qualified.
