PIC16C58B-04/SS - 8-bit 4MHz OTP MCU 3KB 20-SSOP | Microchip
MPN: PIC16C58B-04/SS β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.33 | $2.33 |
| 10 | $2.1 | $21.00 |
| 100 | $1.87 | $187.00 |
| 500 | $1.65 | $825.00 |
| 1,000 | $1.45 | $1,450.00 |
PIC16C58B-04/SS Overview
An 8-bit microcontroller (MCU) is a small, self-contained computer-on-a-chip integrating a CPU, RAM, non-volatile program memory, and peripherals on a single die. OTP (One-Time Programmable) MCUs use EPROM cells that can be written once by a programmer and are ideal for low-cost, moderate-volume production where in-field firmware updates are not required. Within the broader taxonomy, this part sits as MCU -> 8-bit microcontroller -> embedded controller -> semiconductor, and belongs to Microchip's classic PIC16C5X baseline family, the simplest tier of the PIC architecture hierarchy.
Key features include a 12-bit instruction word, two-level deep hardware stack, direct/indirect/relative addressing modes, 8-bit real-time clock/counter (TMR0), programmable code protection, and a wide operating voltage range from 2.5 V to 6.0 V (datasheet extends to 3.0 V to 5.5 V for the OTP variants). The 20-SSOP package supports surface-mount assembly and is well suited to compact board designs in consumer, appliance, and industrial-control applications.
Architecturally, the PIC16C5X uses a Harvard-style RISC core with separate program and data buses, allowing instruction fetch and operand access in the same cycle. The 12-bit instruction width produces approximately 2:1 code compression over typical 8-bit CISC MCUs, reducing program-memory consumption for the same functional task. The device supports RC, XT, LP, and HS oscillator modes, providing flexibility for cost-sensitive crystal designs as well as low-power 32 kHz watch-crystal operation.
Typical applications include low-cost remote controls, appliance controls, automotive subsystems (non-safety), battery chargers, and simple sensor interfaces. The combination of small footprint, modest memory, and broad peripheral support makes this part a long-standing workhorse for legacy embedded designs where deterministic execution and minimal BOM cost are priorities.
When designing with this MCU, note that the PIC16C5X core has a two-level hardware stack and no interrupts; interrupt-driven code must be written by polling. Always place a 0.1 uF decoupling capacitor within 5 mm of VDD and use a bulk capacitor on the MCLR/VPP reset line to ensure clean power-up behavior.
This page synthesizes distributor pricing, SSOP drop-in alternatives within the PIC16C5X family, and practical design notes not found in the manufacturer datasheet alone.
Drop-in alternatives for PIC16C58B-04/SS 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-04/SS (same form factor and footprint) β differing in Package, Program Memory Type, Program Memory Size, RoHS Status, Timers.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16C58B-04I/SS
β Drop-Inβ In Stock
$1.38 / Unit
View Datasheet βPIC16C58B-04E/SS
β Drop-Inβ In Stock
$2.05 / Unit
View Datasheet βPIC16F57-I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16C57C-04I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16C56A-04I/SS
β Drop-Inπ Reference alternative (not in catalog)
PIC16C58B-04/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C5X (8-bit RISC, Harvard) |
| Program Memory Type | OTP (One-Time Programmable EPROM) |
| Program Memory Size | 3 KB (2K x 12 words) |
| RAM | 73 bytes |
| CPU Speed | 4 MHz (max) |
| Instruction Word Width | 12 bits |
| Instruction Set Size | 33 single-word instructions |
| Digital I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0 with 8-bit prescaler) |
| Stack Depth | 2 levels (hardware) |
| Interrupts | None (polling only) |
| Operating Voltage Range | 2.5 V to 6.0 V (3.0 V to 5.5 V OTP typical) |
| Operating Temperature Range | 0 C to +70 C (commercial) |
| Oscillator Modes | RC, XT, LP, HS |
| Package | 20-SSOP (5.30 mm body width) |
| Mounting Type | Surface Mount |
| MSL Level | 1 (unlimited floor life at <30 C / 85% RH) |
| RoHS Status | Compliant |
PIC16C58B-04/SS Pin Configuration
| Pin 1 | MCLR/VPP β Master Clear (reset) input / programming voltage |
| Pin 2 | RA0 β Port A bit 0 (digital I/O) |
| Pin 3 | RA1 β Port A bit 1 (digital I/O) |
| Pin 4 | RA2 β Port A bit 2 (digital I/O) |
| Pin 5 | RA3 β Port A bit 3 (digital I/O) |
| Pin 6 | RB0 β Port B bit 0 (digital I/O, interrupt-on-change on Enhanced parts) |
| Pin 7 | RB1 β Port B bit 1 (digital I/O) |
| Pin 8 | GND β Ground reference |
| Pin 9 | RB2 β Port B bit 2 (digital I/O) |
| Pin 10 | RB3 β Port B bit 3 (digital I/O) |
| Pin 11 | VDD β Positive supply (2.5 V to 6.0 V) |
| Pin 12 | RB4 β Port B bit 4 (digital I/O) |
| Pin 13 | RB5 β Port B bit 5 (digital I/O) |
| Pin 14 | RB6 β Port B bit 6 (digital I/O) |
| Pin 15 | RB7 β Port B bit 7 (digital I/O) |
| Pin 16 | OSC2/CLKOUT β Oscillator crystal output / clock out |
| Pin 17 | OSC1/CLKIN β Oscillator crystal input / external clock in |
| Pin 18 | RC0 β Port C bit 0 (digital I/O) |
| Pin 19 | RC1 β Port C bit 1 (digital I/O) |
| Pin 20 | RC2 β Port C bit 2 (digital I/O) |
Typical Applications
PIC16C58B-04/SS is suitable for 6 applications: Remote Control Transmitter, White Goods Appliance Control, Battery Charger Controller, Automotive Interior Accessories, Sensor Interface Module, Industrial Timer / Sequencer.
Remote Control Transmitter
The PIC16C58B-04/SS suits low-cost IR/RF remote controls where its 3 KB OTP holds button-scan tables, debounce logic, and transmit-frame encoding, while its 12 I/O pins directly drive matrix keypads (3x4 or 4x3) and the modulator output. The 4 MHz core delivers 1 us instruction cycles, comfortably meeting the 38 kHz carrier timing required for RC5/ NEC protocols. The 20-SSOP footprint drops onto compact handheld PCBs, and the 2.5-6 V supply runs directly from 2 x AA cells.
Recommended
White Goods Appliance Control
In washing machines, dishwashers, and microwave ovens, the PIC16C58B-04/SS replaces electromechanical timers with a deterministic state machine. Its 3 KB OTP stores cycle tables and fault-recovery routines, 73 bytes of RAM handles mode flags and sensor averages, and 12 I/O drives relay banks, triac optocouplers, and 7-segment displays. The RISC core executes one instruction per cycle, ensuring tight timing for zero-crossing triac firing without interrupt latency, and the SSOP-20 package tolerates the thermal environment inside consumer enclosures.
Recommended
Battery Charger Controller
The PIC16C58B-04/SS implements CC/CV charge profiles for NiCd/NiMH/Li-ion packs using TMR0 for PWM generation and ADC-free voltage sensing via resistor-divider comparators. Three KB of OTP holds charge-state look-up tables and timer-based termination logic, while the 2-level hardware stack keeps call chains shallow and predictable. Operating from 3.0-5.5 V, the part runs directly from a regulated USB or wall-adapter rail; its SSOP-20 footprint fits compact charger PCBs alongside power MOSFETs.
Recommended
Automotive Interior Accessories
For non-safety automotive subsystems such as interior lighting, mirror controls, and seat-position presets, PIC16C58B-04/SS provides reliable 8-bit control at automotive cost points. The 12 I/O drive LED drivers and H-bridge enable lines, while TMR0 sequences PWM dimming. Designers migrate to PIC16C58B-04I/SS or -04E/SS when automotive temperature grades (-40 C to +85 C or -40 C to +125 C) are required. The SSOP-20 footprint is compatible with high-vibration PCB assembly processes used in automotive tier-1 builds.
Recommended
Sensor Interface Module
The PIC16C58B-04/SS serves as a low-cost bridge between analog sensors and digital hosts, digitizing thermistor or photodiode inputs via on-chip comparators (where available) or external ADC, then streaming formatted packets over UART bit-banged on any of the 12 I/O pins. Three KB of OTP accommodates linearization tables for NTC thermistors, while 73 bytes of RAM buffers measurement frames. The 4 MHz clock provides precise UART baud-rate generation up to 38.4 kbps at common 4 MHz crystal settings.
Recommended
Industrial Timer / Sequencer
PIC16C58B-04/SS implements multi-stage process timers and sequencers for industrial control panels where deterministic execution matters more than raw throughput. TMR0 with its 8-bit prescaler provides timing resolution from microseconds to minutes, and the 33-instruction RISC core keeps scan cycles predictable. Twelve I/O drive relay coils, status LEDs, and optically isolated enable inputs. The 2.5-6 V supply accepts 5 V PLC logic rails and 24 V industrial rails with external regulation.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C58B-04/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C58B-04I/SS | PIC16C58B-04E/SS | PIC16F57-I/SS | PIC16C57C-04I/SS | PIC16C56A-04I/SS |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 20-SSOP | 20-SSOP (same) | 20-SSOP (same) | 20-SSOP (same) | 20-SSOP (same) | 20-SSOP (same) |
| Program Memory | 3 KB OTP (2K x 12) | 3 KB OTP (2K x 12) | 3 KB OTP (2K x 12) | 3 KB Flash | 1 KB OTP (-67%) | 1 KB OTP (-67%) |
| RAM | 73 bytes | 73 bytes | 73 bytes | 72 bytes | 72 bytes | 25 bytes |
| Max Clock Speed | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 4 MHz | 4 MHz |
| Temperature Range | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +125 C (extended) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Memory Type | OTP (EPROM) | OTP (EPROM) | OTP (EPROM) | Flash (reprogrammable) | OTP (EPROM) | OTP (EPROM) |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Lifecycle Status | NRND | NRND | NRND | Active | NRND | NRND |
Key Differentiators
- Largest OTP memory in PIC16C5X SSOP family (vs PIC16C57C-04I/SS)
- Reprogrammable Flash alternative available (vs PIC16F57-I/SS)
- Commercial temperature rating versus industrial variants (vs PIC16C58B-04I/SS)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 11) and a bulk capacitor (4.7-10 uF) on the same net. The PIC16C58B-04/SS draws very low current during operation (typically <2 mA at 4 MHz, 5 V) but OTP programming pulses on MCLR/VPP draw up to ~25 mA; the bulk capacitor stabilizes VDD during programming. Always sequence MCLR/VPP high-to-low at power-up after VDD reaches 1.5 V minimum, per datasheet DS30453B section on Power-on Reset.
PIC16C5X baseline parts have no hardware interrupts and only a 2-level hardware stack; deeply nested subroutine calls silently overwrite the stack. Keep call chains to 2 levels or convert to iterative state machines. Also note that PORTB on PIC16C5X parts does NOT support internal weak pull-ups - external 10-100 kohm pull-ups are required on any input that needs to be default-high. Source: PIC16C5X datasheet DS30453B.
Route the crystal traces (OSC1/OSC2) short and symmetric, with the load capacitors (typically 15-22 pF for XT, 100-150 pF for LP at 32.768 kHz) placed within 5 mm of the MCU. Keep oscillator traces away from high-current switching nodes (relay coils, triac outputs) to avoid coupling noise into the clock. For HS-mode designs at 4 MHz or above, place a ground guard ring around the crystal to reduce EMI susceptibility.
Estimated: at 4 MHz Fosc, the 1 us instruction cycle allows bit-banged UART up to 57.6 kbps with 7% timing error using the standard PIC16C5X software UART technique. For production designs requiring reliable serial communication, prefer a crystal frequency that divides evenly (e.g., 3.579545 MHz for 300/1200/2400/9600 baud at 0% error) rather than 4 MHz. The internal RC oscillator (if used) introduces additional drift over temperature.
Compliance Information
RoHS compliant per Microchip product documentation. AEC-Q100 not applicable for commercial-grade part; choose PIC16C58B-04I/SS or -04E/SS for automotive-grade applications per Microchip PIC16C5X family datasheet DS30453B.