PIC16C58BT-04I/SS - 4MHz 8-Bit OTP MCU, 3KB | Microchip
MPN: PIC16C58BT-04I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $4.2 | $4.20 |
| 10 | $3.78 | $37.80 |
| 100 | $3.36 | $336.00 |
| 500 | $2.95 | $1,475.00 |
| 1,000 | $2.65 | $2,650.00 |
PIC16C58BT-04I/SS Overview
A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory, data memory, and integrated peripherals. The PIC16C5X family belongs to the broader category of 8-bit microcontrollers within the embedded semiconductor hierarchy (MCU -> microcontroller -> embedded processor -> semiconductor IC). These devices target cost-sensitive, deterministic control applications where predictable interrupt latency and low power consumption are more important than raw computational throughput. OTP program memory is programmed once during production and cannot be erased, making the PIC16C58B family ideal for high-volume, fixed-function appliances where firmware is finalized at build time.
Key differentiating features include the 12-bit instruction word architecture (giving 2K x 12 = 3KB program space), the Harvard bus architecture that allows simultaneous instruction and data fetches, and the industrial-grade -40C to +85C operating temperature range denoted by the I suffix. The 4MHz maximum clock combined with a 4-cycle-per-instruction timing yields a 1 MIPS instruction throughput. The device also features a 8-bit wide data path, 7 special-function hardware registers, and a 2-level hardware stack for subroutine nesting.
Typical applications include consumer appliances, automotive body electronics (non-safety), remote controls, security sensor interfaces, low-end motor control, and battery-powered instrumentation. The PIC16C58B was historically used in keyboard encoders, infrared remote transmitters, and simple sensor signal conditioning circuits.
When designing with this device, ensure your programmer supports the OTP windowed/standard programming algorithm and budget for the OTP-only limitation (no field reprogramming). For prototypes, consider the JW windowed ceramic package variant for UV-eraseable development cycles, then switch to PIC16C58BT-04I/SS for production. Decoupling capacitors of 0.1uF should be placed within 5mm of VDD, and unused I/O pins should be configured as outputs to minimize supply current.
This page synthesizes distributor pricing (DigiKey, Octopart), drop-in alternatives including PIC16C58B-04I/SS and PIC16F506-I/SS, and practical design notes (POR timing, WDT configuration, oscillator selection) that complement the manufacturer datasheet for board-level integration planning.
Drop-in alternatives for PIC16C58BT-04I/SS — 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-04I/SS (same form factor and footprint) — differing in Package, Core Architecture, Program Memory Type, Operating Temperature, Timers.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C58BT-04/SS
✅ Drop-In✓ In Stock
$1.62 / Unit
View Datasheet →PIC16C58B-04I/SS
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C58B-20I/SS
✅ Drop-In✓ In Stock
$1.74 / Unit
View Datasheet →PIC16C58B-40/SS
✅ Drop-In✓ In Stock
$0.72 / Unit
View Datasheet →PIC16C58B-04/SS
✅ Drop-In✓ In Stock
$1.45 / Unit
View Datasheet →PIC16C58B-04/P
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16C58BT-04I/SS Maximum Ratings & Electrical Characteristics
| Core | PIC16 8-bit RISC |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 3KB (2K x 12) |
| RAM | 73 bytes |
| I/O Pins | 12 |
| Maximum Clock Frequency | 4 MHz |
| Instruction Throughput | 1 MIPS (4-cycle instruction) |
| Supply Voltage (VDD) | 3.0 V to 5.5 V |
| Operating Temperature | -40 C to +85 C (industrial grade) |
| Package | 20-SSOP (0.209 inch / 5.30 mm width) |
| Mounting Type | Surface Mount |
| Oscillator Modes | External RC, XT, LP, HS |
| Watchdog Timer (WDT) | Yes (on-chip) |
| Power-On Reset (POR) | Yes (on-chip) |
| Stack Depth | 2 levels (hardware) |
| Instruction Word Width | 12 bits |
| Data Path Width | 8 bits |
| Process Technology | CMOS |
| MSL Level | 1 (unlimited floor life) |
| RoHS Status | Compliant |
PIC16C58BT-04I/SS Pin Configuration
| Pin 1 | RA0 — Port A bit 0 (I/O) |
| Pin 2 | RA1 — Port A bit 1 (I/O) |
| Pin 3 | RA2 — Port A bit 2 (I/O) |
| Pin 4 | RA3 — Port A bit 3 (I/O) |
| Pin 5 | RB0 — Port B bit 0 (I/O) |
| Pin 6 | RB1 — Port B bit 1 (I/O) |
| Pin 7 | RB2 — Port B bit 2 (I/O) |
| Pin 8 | RB3 — Port B bit 3 (I/O) |
| Pin 9 | RB4 — Port B bit 4 (I/O) |
| Pin 10 | RB5 — Port B bit 5 (I/O) |
| Pin 11 | RB6 — Port B bit 6 (I/O) |
| Pin 12 | RB7 — Port B bit 7 (I/O) |
| Pin 13 | VSS — Ground reference |
| Pin 14 | VDD — Positive supply (3.0V to 5.5V) |
| Pin 15 | OSC2 — Oscillator output (crystal/RC) |
| Pin 16 | OSC1 — Oscillator input (crystal/RC/external clock) |
| Pin 17 | NC — Not connected (per datasheet) |
| Pin 18 | NC — Not connected (per datasheet) |
| Pin 19 | NC — Not connected (per datasheet) |
| Pin 20 | NC — Not connected (per datasheet) |
Typical Applications
PIC16C58BT-04I/SS is suitable for 7 applications: Consumer Appliance Control, IR Remote Control Transmitter, Security Sensor Interface, Automotive Body Electronics, Battery-Powered Instrumentation, Keyboard and Encoder Interface, Simple Sensor Signal Conditioning.
Consumer Appliance Control
The PIC16C58BT-04I/SS is well suited to consumer appliance control boards such as washing-machine sub-controllers, microwave keypads, and rice-cooker thermal loops where the 3KB OTP program memory holds a fixed control algorithm and the 12 I/O pins drive keypads, seven-segment displays, and triac-triggered heater loads. The industrial -40C to +85C temperature range survives kitchen and laundry-room thermal stress. The 4 MHz / 1 MIPS throughput is more than adequate for slow electromechanical sequencing with deterministic interrupt latency, and the WDT protects against firmware lockup in unattended appliances. The 25 mA per-pin sink current directly drives LED indicators and optocouplers without external transistors.
Recommended
IR Remote Control Transmitter
The PIC16C58BT-04I/SS fits IR remote control transmitters where 3KB of OTP holds the encoding table for TV/VCR/DVD command sets, 73 bytes of RAM stores the current key matrix state, and 12 I/O pins scan an 8x4 keypad matrix plus drive an IR LED through a single transistor. The 3.0V to 5.5V supply range matches 3V coin-cell or 4.5V battery packs, and the 4 MHz instruction rate easily generates 38 kHz / 40 kHz carrier frequencies with software PWM. Low-cost OTP is acceptable because the encoding table is finalized per product SKU and never needs field updates. Power consumption in sleep mode with WDT active is well under 10 uA.
Recommended
Security Sensor Interface
The PIC16C58BT-04I/SS serves in PIR motion sensor interfaces, magnetic reed-switch alarm panels, and smoke-detector base units where 3KB OTP stores the alarm logic and debounce tables, 12 I/O pins read multiple sensor inputs plus drive piezo buzzers and relay coils, and the WDT provides fail-safe recovery if firmware hangs. The industrial temperature rating is essential for outdoor security enclosures that experience -20C winter nights and +70C summer roof-heat conditions. The 4 MHz clock samples multiple analog sensors sequentially through a single ADC-less comparator input, and the 25 mA sink current directly drives alarm bells without driver transistors.
Recommended
Automotive Body Electronics
The PIC16C58BT-04I/SS fits non-safety automotive body modules such as interior lighting controllers, seat-position memory switches, and mirror-adjust modules where 3KB OTP holds the timing logic, 12 I/O drive LED backlights and H-bridge relays, and the industrial -40C to +85C rating covers cabin-temperature extremes. The PIC16C58B family is NOT AEC-Q100 qualified, so this part should not be used in safety-critical systems like airbags, ABS, or electronic stability control. For AEC-Q100 automotive-grade baseline PICs, migrate to PIC16F5X Flash-based automotive variants with the same 20-pin SSOP footprint.
Recommended
Battery-Powered Instrumentation
The PIC16C58BT-04I/SS is suitable for handheld digital thermometers, humidity-logger badges, and low-end multimeters where 3KB OTP stores the calibration table and display driver, 73 bytes of RAM holds measurement history, 12 I/O pins multiplex the LCD segments and read the ADC through a comparator, and the 3.0V minimum supply matches two AA alkaline cells. Sleep current with WDT active is well under 10 uA, allowing months of battery life. The PIC16C58B industrial temperature range covers outdoor weather-station exposure. The 4 MHz / 1 MIPS is sufficient for 10 Hz temperature sampling with software linearization.
Recommended
Keyboard and Encoder Interface
The PIC16C58BT-04I/SS is widely used in keyboard matrix encoders and PS/2-to-USB converter dongles where 3KB OTP holds the scan-table lookup, 73 bytes of RAM tracks the rollover buffer, and 12 I/O pins directly scan an 8x4 matrix with no external diodes needed. The 4 MHz instruction rate performs full matrix debouncing in software within 1 ms, and the 25 mA sink current drives the keyboard LEDs without driver transistors. Industrial temperature rating suits industrial keypads and human-machine-interface panels. The OTP-only limitation is acceptable because the keyboard layout is finalized at design time.
Recommended
Simple Sensor Signal Conditioning
The PIC16C58BT-04I/SS handles sensor signal conditioning front-ends for thermistor bridges, photodiode amplifiers, and strain-gauge interfaces where 3KB OTP holds the linearization polynomial, 12 I/O pins read the comparator output and drive PWM excitation, and the WDT protects against fault loops. The PIC16C58B 4 MHz clock generates stable software-PWM excitation frequencies for ratiometric measurement, and the 25 mA per-pin source current drives low-impedance sensor bridges directly. Industrial temperature range covers factory-floor environments. The 2-level hardware stack is sufficient for the linear routines and interrupt handlers typical in sensor firmware.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C58BT-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C58BT-04/SS | PIC16C58B-04I/SS | PIC16C58B-20I/SS | PIC16C58B-40/SS | PIC16C58B-04/SS | PIC16C58B-04/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | 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 | 20-SSOP - same |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 20 MHz | 40 MHz | 4 MHz | 4 MHz |
| Program Memory | 3KB (2K x 12) OTP | 3KB (2K x 12) OTP | 3KB (2K x 12) OTP | 3KB (2K x 12) OTP | 3KB (2K x 12) OTP | 3KB (2K x 12) OTP | 3KB (2K x 12) OTP |
| RAM | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes |
| Operating Temperature | -40C to +85C (industrial) | 0C to +70C (commercial) | -40C to +85C (industrial) | -40C to +85C (industrial) | 0C to +70C (commercial) | 0C to +70C (commercial) | 0C to +70C (commercial) |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Packaging Form | Tape & Reel | Tape & Reel | Tube | Tube | Tube | Tube | Tube |
| Supply Voltage | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V | 3.0V to 5.5V |
Key Differentiators
- Industrial temperature range with tape-and-reel packaging (vs PIC16C58B-04I/SS)
- 4 MHz speed grade optimized for low-power operation (vs PIC16C58B-20I/SS)
- OTP memory for lowest unit cost at high volume (vs PIC16F506-I/SS)
Design Notes
Place a 0.1 uF ceramic decoupling capacitor within 5 mm of the VDD pin (pin 14) and a bulk 10 uF electrolytic or tantalum capacitor on the same supply rail. The PIC16C58BT-04I/SS supply current is typically 2 mA active at 4 MHz / 5V and under 10 uA in sleep mode. A 10 ohm series ferrite bead on VDD can reduce conducted noise from switching peripherals sharing the rail. Ensure VDD rise time during power-on is monotonic for reliable POR; add an RC reset delay if the regulator ramps slowly.
Route the OSC1/OSC2 crystal traces as short as possible (under 10 mm) and guard them with a ground plane on both sides of the PCB to minimize stray capacitance. Place crystal-loading capacitors (typically 15-33 pF per Microchip datasheet 30412F) as close to the OSC pins as possible. Keep the crystal traces away from high-current switching traces and RB7 (which is the ICSP data pin on Flash variants). For RC oscillator mode, place the resistor and capacitor adjacent to OSC1 with the ground side of the capacitor returning directly to VSS pin 13.
The PIC16C58BT-04I/SS uses parallel programming with 13V VPP, not ICSP. Do not connect VPP to VDD in-circuit or apply voltages above 5.5V to any pin during normal operation. Configure unused I/O pins as outputs and tie them to ground or VDD through software to minimize supply current. The 2-level hardware stack supports only 2 subroutine calls deep; deeper nested calls will overwrite the stack. Enable the Watchdog Timer in firmware for unattended applications and clear it in a single main-loop code path to detect runaway code.
The 20-SSOP package has a thermal resistance of approximately 150 C/W (theta_JA) in still air, with the 3KB OTP drawing typically 2 mA at 4 MHz / 5V (about 10 mW). Junction-temperature rise is negligible at normal operating currents. However, if all 12 I/O pins are sourcing or sinking the 25 mA absolute-maximum simultaneously, total I/O power can reach 1.5 W and raise junction temperature 225 C above ambient, exceeding the 150 C absolute maximum. Stay below 10 mA per pin in production designs and sum total current to stay under 200 mW package dissipation.
Compliance Information
RoHS compliant per Microchip product page. Not AEC-Q100 qualified; the PIC16C58B family is not recommended for safety-critical automotive applications. For AEC-Q100 baseline PICs, use PIC16F5X automotive variants.
