PIC16LC58BT-04I/SS - 8-Bit 4MHz OTP MCU 3KB 20-SSOP | Microchip
MPN: PIC16LC58BT-04I/SS ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.85 | $3.85 |
| 10 | $3.47 | $34.70 |
| 100 | $3.08 | $308.00 |
| 500 | $2.74 | $1,370.00 |
| 1,000 | $2.42 | $2,420.00 |
PIC16LC58BT-04I/SS Overview
An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, RAM, non-volatile program memory, and peripheral I/O on one die. The PIC16C5X family belongs to the legacy PIC baseline architecture (12-bit wide instructions, 8-bit wide data path), positioned in the broader taxonomy as: PIC16C5X -> PIC16C family -> PIC baseline core -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. This architecture uses a two-level deep hardware stack with seven or eight special-function hardware registers and supports direct, indirect, and relative addressing modes for compact code density.
Key features include 12-bit instruction width, 8-bit data path, two-level deep hardware stack, 7-8 special function hardware registers, 12 bidirectional I/O pins, and a Watchdog Timer for reliable operation. The fully static CMOS design allows the clock to be stopped without losing register state, and the OTP program memory supports in-system programming via Microchip's ICSP protocol. The PIC16LC58BT series is widely used in cost-sensitive, low-power embedded applications where deterministic real-time response is more important than raw compute throughput.
Typical applications include industrial control modules, appliance controllers, security alarm panels, sensor signal conditioning front-ends, low-cost remote-control encoders, and general-purpose glue-logic replacement. The 12 I/O pins can drive displays, relays, keypads, or serial interfaces via firmware bit-banging. Compared to flash-based PIC16F1xxx parts, the OTP memory is one-time programmable which lowers unit cost and provides slightly better code security against reverse engineering.
When designing with this part, allocate a 4-pin ICSP header (VDD, VSS, RB6, RB7) for in-system programming and reserve the MCLR/VPP pin as a reset input. Because the OTP memory cannot be erased, use a socketed SSOP footprint during prototyping or a PIC16CR58B/ROM-equivalent variant for volume code-rotation flexibility. Decouple VDD with a 100nF ceramic placed within 5mm of the VDD pin and add a 10k pull-up on MCLR for reliable reset behavior.
Drop-in alternatives for PIC16LC58BT-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 PIC16LC58BT-04I/SS (same form factor and footprint) — differing in Program Memory Size, Core Architecture, Operating Temperature Range, Package, Watchdog Timer.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16LC58B-04/SO
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.62 / Unit
View Datasheet →PIC16LC56A-04/SS
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$0.6 / Unit
View Datasheet →PIC16LC58B-04/P
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$1.86 / Unit
View Datasheet →PIC16LC58BT-04I/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC16C5X baseline (12-bit instruction, 8-bit data path) |
| Data Bus Width | 8-bit |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 3 KB (2K x 12) |
| RAM Size | 73 bytes |
| Number of I/O Pins | 12 |
| Maximum Clock Frequency | 4 MHz |
| Supply Voltage Range | 2.5 V to 6.25 V |
| Operating Temperature Range | -40C to +85C (Industrial) |
| Package | 20-SSOP (0.209 inch / 5.30 mm body width) |
| Mounting Type | Surface Mount |
| Hardware Stack | 2-level deep |
| Special Function Registers | 7-8 hardware registers |
| Addressing Modes | Direct, Indirect, Relative |
| Watchdog Timer | Yes |
| Lifecycle Stage | ACTIVE |
| RoHS Status | Compliant |
PIC16LC58BT-04I/SS Pin Configuration
| Pin 1 | MCLR/VPP — Master Clear reset input / programming voltage |
| Pin 2 | RA0 — Bidirectional I/O, PORTA bit 0 |
| Pin 3 | RA1 — Bidirectional I/O, PORTA bit 1 |
| Pin 4 | RA2 — Bidirectional I/O, PORTA bit 2 |
| Pin 5 | RA3 — Bidirectional I/O, PORTA bit 3 |
| Pin 6 | RC4 — Bidirectional I/O, PORTC bit 4 |
| Pin 7 | RC5 — Bidirectional I/O, PORTC bit 5 |
| Pin 8 | RC6 — Bidirectional I/O, PORTC bit 6 |
| Pin 9 | RC7 — Bidirectional I/O, PORTC bit 7 |
| Pin 10 | VSS — Ground reference |
| Pin 11 | RC0 — Bidirectional I/O, PORTC bit 0 |
| Pin 12 | RC1 — Bidirectional I/O, PORTC bit 1 |
| Pin 13 | RC2 — Bidirectional I/O, PORTC bit 2 |
| Pin 14 | RC3 — Bidirectional I/O, PORTC bit 3 |
| Pin 15 | RB7 — Bidirectional I/O, PORTB bit 7 |
| Pin 16 | OSC1 — Oscillator input / external clock input |
| Pin 17 | OSC2 — Oscillator output |
| Pin 18 | RB0 — Bidirectional I/O, PORTB bit 0 |
| Pin 19 | VSS — Ground reference (secondary) |
| Pin 20 | VDD — Positive supply voltage |
Typical Applications
PIC16LC58BT-04I/SS is suitable for 6 applications: Industrial Control Modules, Appliance Control Boards, Security Alarm Panels, Sensor Signal Conditioning Front-Ends, Low-Cost Remote Control Encoders, General-Purpose Glue-Logic Replacement.
Industrial Control Modules
The PIC16LC58BT-04I/SS is well-suited to industrial control modules where deterministic firmware execution and rugged temperature performance are required. The 4 MHz baseline core executes one instruction per two clock cycles, giving predictable timing for relay actuation, sensor scanning, and simple closed-loop control loops. Its 2.5 V to 6.25 V supply range allows direct connection to 5 V and 3.3 V industrial rails without level shifters, while the industrial -40C to +85C operating range meets IEC 60068 environmental requirements for factory floor equipment. The 12 I/O pins can drive LEDs, optocouplers, and small relays directly via firmware. With 3 KB of OTP program memory, designers can implement state machines for motor starters, conveyor interlocks, and process timers without external memory.
Recommended
Appliance Control Boards
The PIC16LC58BT-04I/SS serves as the central controller in appliance boards such as washing machines, dishwashers, coffee makers, and small kitchen appliances. The 8-bit PIC baseline core executes deterministic firmware for sequencing pumps, solenoids, and heaters with predictable cycle times. Its 73 bytes of RAM comfortably hold small state-machine variables and stack frames for nested subroutines, while 3 KB of OTP memory fits entire appliance firmware for typical timing and safety logic. The wide 2.5 V to 6.25 V supply accommodates unregulated 5 V wall adapters or 3.3 V battery rails. Cost-sensitive appliance OEMs benefit from the OTP memory's lower per-unit price compared to flash-based MCUs, and the lack of reprogramming capability provides inherent protection against firmware tampering.
Recommended
Security Alarm Panels
The PIC16LC58BT-04I/SS is an effective controller for residential and commercial security alarm panels where 12 I/O lines are sufficient to scan a keypad, drive a piezo siren, monitor reed switches and PIR sensors, and communicate status via a relay output. The Watchdog Timer prevents the panel from locking up during power-line disturbances, while the hardware stack allows nested interrupt servicing for sensor polling. The industrial -40C to +85C range supports indoor installation in unheated spaces. OTP memory prevents firmware modification by attackers, providing a slight security advantage over flash-based MCUs. The wide 2.5 V to 6.25 V supply range tolerates backup-battery voltage variation during power outages.
Recommended
Sensor Signal Conditioning Front-Ends
The PIC16LC58BT-04I/SS provides a low-cost MCU front-end for sensor signal conditioning in measurement and instrumentation applications. The 8-bit core performs digital filtering, linearization, and calibration on raw sensor readings from thermocouples, RTDs, strain gauges, or humidity sensors. The 12 I/O lines interface to sigma-delta ADCs, multiplexers, and display drivers, while 73 bytes of RAM hold sample buffers and moving averages. The 4 MHz clock and 12-bit instruction word give deterministic loop timing for oversampling algorithms. The wide 2.5 V to 6.25 V supply range allows operation from single-cell battery stacks or regulated 5 V rails. The fully static CMOS design enables low-power sleep modes between measurements for battery-operated field instruments.
Recommended
Low-Cost Remote Control Encoders
The PIC16LC58BT-04I/SS is well-suited to low-cost remote-control transmitters for toys, ceiling fans, garage door openers, and simple RF/IR encoder applications. The 8-bit core generates bit-banged PWM, PPM, or Manchester-encoded waveforms for inexpensive RF modules at 433 MHz or 315 MHz. With 3 KB of OTP program memory, designers can implement custom rolling-code encryption or address-matching tables to prevent cross-talk. The 12 I/O lines connect directly to mechanical or capacitive keypads, indicator LEDs, and the RF transmitter's data input. The wide 2.5 V to 6.25 V supply range runs directly from two or three alkaline cells without voltage regulation. Cost-sensitive remote-control OEMs benefit from the OTP's per-unit price advantage.
Recommended
General-Purpose Glue-Logic Replacement
The PIC16LC58BT-04I/SS replaces discrete glue logic such as 74HC-series gates, latches, and small state machines in legacy industrial designs. With 12 I/O lines, the PIC16C5X core can implement timing generators, frequency dividers, sequence controllers, and protocol converters in a single chip instead of a board full of TTL. The 3 KB OTP memory holds the entire glue-logic replacement firmware, and the deterministic 4 MHz execution provides predictable response time for handshake sequencing. The wide 2.5 V to 6.25 V supply tolerates legacy 5 V logic rails and modern 3.3 V rails. Cost-driven retrofits of legacy equipment benefit from board space savings, BOM simplification, and easier firmware revision compared to soldering discrete logic gates.
Recommended
Recommended Products Summary
Engineering reference data for PIC16LC58BT-04I/SS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16LC58B-04/SO | PIC16LC56A-04/SS | PIC16LC58B-04/P |
|---|---|---|---|---|
| Package | 20-SSOP | 20-SSOP - same | 20-SSOP - same | 20-SSOP - same |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Core Architecture | PIC16C5X baseline (12-bit instructions) | PIC16C5X baseline - same | PIC16C5X baseline - same | PIC16C5X baseline - same |
| Program Memory Size | 3 KB (2K x 12) OTP | 3 KB (2K x 12) OTP | 1 KB OTP (-67%) | 3 KB (2K x 12) OTP |
| RAM Size | 73 bytes | 73 bytes | 41 bytes (-44%) | 73 bytes |
| Maximum Clock Frequency | 4 MHz | 4 MHz | 4 MHz | 4 MHz |
| Supply Voltage Range | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V | 2.5 V to 6.25 V |
| I/O Pins | 12 | 12 | 12 | 12 |
| Lifecycle Status | ACTIVE | ACTIVE | ACTIVE | ACTIVE |
Key Differentiators
- Industrial temperature grade with low-voltage core (vs PIC16C58B-04/P (commercial temp variant))
- Tape-and-reel packaging for SMT assembly (vs PIC16LC58B-04/SO (tube-packaged same-die))
- Wide 2.5 V to 6.25 V supply range supports 3.3 V and 5 V rails (vs PIC16F716-I/SS (3.0 V to 5.5 V flash-based MCU))
Design Notes
Decouple VDD (pin 20) with a 100 nF ceramic capacitor placed within 5 mm of the IC pin to suppress switching transients on the supply rail. The PIC16C5X core draws peak currents of approximately 10 mA during instruction execution, so a low-ESR ceramic is required. For battery-powered designs, the CMOS core supports a SLEEP instruction that drops current to microampere levels; however, the Watchdog Timer must be disabled to achieve the lowest sleep current.
Place the ICSP programming header footprint (VDD, VSS, RB6, RB7, MCLR/VPP) on the PCB for in-system programming access during prototyping. MCLR (pin 1) must be pulled high with a 10 kohm resistor for normal operation; leaving it floating causes spurious resets. Route OSC1 (pin 16) and OSC2 (pin 17) traces as short as possible to minimize parasitic capacitance, and keep them away from high-current switching signals.
Because the OTP program memory cannot be erased, prototype units should use a socketed SSOP footprint or migrate to a flash-based PIC16F1xxx family part for code development. Per the PIC16C5X datasheet, attempting to program a previously programmed OTP location with a different bit value is non-destructive but the original '0' bits cannot be changed to '1'. Engineers must verify the entire firmware image before committing to OTP programming in production.
Compliance Information
RoHS compliant per Microchip product page and verified distributor data (etei.com cross-reference). REACH status compliant. Not AEC-Q100 qualified - this part is intended for industrial/consumer applications rather than automotive safety-critical use.
