PIC16C58BT-40/SS - 8-bit 40MHz OTP MCU 3KB | Microchip
MPN: PIC16C58BT-40/SS β End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $2.85 | $2.85 |
| 10 | $2.55 | $25.50 |
| 100 | $2.18 | $218.00 |
| 500 | $1.82 | $910.00 |
| 1,000 | $1.49 | $1,490.00 |
PIC16C58BT-40/SS Overview
A PIC microcontroller is a compact programmable logic device based on a Harvard-architecture RISC core. PIC16C5X devices belong to the original PIC family of 8-bit microcontrollers - they execute one instruction per clock cycle (except branches) and use 12-bit wide instructions. The hierarchy is: PIC16C5X -> PIC16C family -> PIC microcontroller -> 8-bit MCU -> microcontroller -> embedded IC. They are OTP variants, meaning program memory can be written once and is non-erasable, distinguishing them from flash-based PIC16F devices.
Key features include 12 digital I/O pins, a programmable timer/counter, a watchdog timer, power-on reset, and a wide operating voltage range typical of the PIC16C5X family. The 20-pin SSOP package provides a small footprint while supporting the full peripheral set, and the commercial temperature grade (0C to +70C) makes it suitable for consumer and industrial embedded applications.
The PIC16C58B uses a static CMOS design with low power consumption, suitable for both battery-powered and line-powered applications. Its RISC architecture delivers performance an order of magnitude higher than competing 8-bit MCUs in the same price category, and its 12-bit wide, highly symmetrical instructions produce 2:1 code compression versus other 8-bit microcontrollers in its class.
Typical applications include appliance control, sensor interface modules, LED driver controllers, simple motor control, and consumer white goods where deterministic response, low cost, and one-time programmability are required. The PIC16C5X architecture has been in production for decades and is supported by a mature toolchain including MPASM assembler and MPLAB IDE.
When designing with this MCU, ensure that all unused I/O pins are configured as outputs and tied low to minimize power consumption. Because this is an OTP device, firmware must be fully validated on a windowed or flash equivalent before committing to the production order.
This page synthesizes distributor pricing, drop-in same-package alternatives from Microchip's PIC16C5X family, and practical design notes not aggregated on any single distributor page, providing engineers with a single-source decision view.
Drop-in alternatives for PIC16C58BT-40/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 PIC16C58BT-40/SS (same form factor and footprint) β differing in Package, Program Memory Type, Core Architecture, Instruction Set, Timers.
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Request AlternativesPIC16C58BT-40/SS Maximum Ratings & Electrical Characteristics
| Core Architecture | PIC 8-bit RISC |
| Family | PIC16C5X (PIC16C58B) |
| Program Memory Type | OTP (One-Time-Programmable) |
| Program Memory Size | 3 KB (2K x 12) |
| RAM Size | 73 bytes |
| Maximum Clock Frequency | 40 MHz |
| Data Bus Width | 8-bit |
| Instruction Width | 12-bit |
| Number of I/O Pins | 12 |
| Number of Terminals | 20 |
| Package | 20-SSOP (0.209 inch, 5.30 mm width) |
| Terminal Form | Gull Wing |
| Package Code | SSOP |
| Package Shape | Rectangular |
| Temperature Grade | Commercial |
| Mounting Type | Surface Mount |
| Watchdog Timer | Yes |
| Timer/Counters | Yes (programmable, exact count per datasheet) |
PIC16C58BT-40/SS 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 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 I/O port B bit 0 / External interrupt input |
| Pin 7 | RB1 β I/O port B bit 1 |
| Pin 8 | RB2 β I/O port B bit 2 |
| Pin 9 | RB3 β I/O port B bit 3 |
| Pin 10 | RB4 β I/O port B bit 4 |
| Pin 11 | RB5 β I/O port B bit 5 |
| Pin 12 | RB6 β I/O port B bit 6 |
| Pin 13 | RB7 β I/O port B bit 7 |
| Pin 14 | VDD β Positive supply voltage |
| Pin 15 | OSC2/CLKOUT β Oscillator output / clock out |
| Pin 16 | OSC1/CLKIN β Oscillator input / external clock in |
| Pin 17 | RC0 β I/O port C bit 0 (or RA5 on this die revision) |
| Pin 18 | RC1 β I/O port C bit 1 (or RA6 on this die revision) |
| Pin 19 | RC2 β I/O port C bit 2 (or RA7 on this die revision) |
| Pin 20 | RC3 β I/O port C bit 3 / peripheral I/O on this die revision |
Typical Applications
PIC16C58BT-40/SS is suitable for 6 applications: Appliance Control Boards, Sensor Interface Modules, LED Display Drivers, Remote Control Transmitters, Simple Motor Control, Consumer White Goods Interface.
Appliance Control Boards
The PIC16C58BT-40/SS fits appliance control boards (washing machines, microwaves, dishwashers) because its 3 KB OTP program memory accommodates fixed-function state machines for motor sequencing and sensor polling. The 12 I/O pins map cleanly to relay drivers, keypad scanning, and triac control lines typical of white-goods front panels. At 40 MHz the PIC16C58B executes 40 MIPS, sufficient for soft-start ramps and safety-interlock polling without an RTOS. The SSOP-20 footprint suits compact control PCBAs behind membrane keypads.
Recommended
Sensor Interface Modules
For low-cost sensor interface modules (temperature, humidity, optical counters), the PIC16C58BT-40/SS provides deterministic periodic sampling via its on-chip timer/counter and 73-byte RAM buffer for moving-average filtering. The 40 MHz throughput allows polled ADC reads from external 8/10-bit ADCs at rates up to 100 kSPS without DMA. The 20-pin SSOP leaves sufficient pins for UART/SPI sensor bridges while remaining under USD 3 in 1k quantities - ideal for high-volume IoT edge nodes.
Recommended
LED Display Drivers
The PIC16C58BT-40/SS drives multiplexed 7-segment or dot-matrix LED displays by bit-banging row/column patterns via its 12 I/O pins, with the 40 MHz clock enabling smooth PWM dimming at frequencies above 100 Hz to avoid flicker. The 3 KB OTP holds lookup tables for character ROM, brightness curves, and animation sequences. Its 5V-tolerant CMOS outputs source/sink enough current (typ. 25 mA per pin) to drive transistor arrays directly without external drivers.
Recommended
Remote Control Transmitters
In IR/RF remote controls the PIC16C58BT-40/SS encodes button matrices via its 12 I/O pins and modulates a 38 kHz carrier using software PWM at the 40 MHz clock. The OTP memory locks the protocol to prevent field tampering, while the SSOP-20 package keeps the BOM under 1 cm squared. Low-power sleep via the watchdog wakeup mode suits battery-powered remotes lasting years on a single coin cell.
Recommended
Simple Motor Control
For small brushed DC or stepper motor control (fans, pumps, valve actuators), the PIC16C58BT-40/SS generates PWM commutation signals directly via hardware timer compare and direction logic on its I/O pins. The 40 MHz throughput allows PID-loop update rates up to 10 kHz without CPU starvation. SSOP-20 footprint integrates into compact motor-driver PCBs alongside H-bridge ICs.
Recommended
Consumer White Goods Interface
The PIC16C58BT-40/SS serves as the user-interface MCU in coffee makers, rice cookers, and air purifiers, scanning capacitive touch buttons via RC-oscillator timing tricks and driving LED indicators through its I/O ports. The OTP memory locks calibration data for sensor compensation, while the commercial 0C to +70C temperature grade covers all indoor appliance environments. The 40 MHz clock keeps UI latency below 50 ms even with debounced key scans.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C58BT-40/SS β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C58B-40/SS | PIC16C58BT-20/SS | PIC16C58BT-04/SS | PIC16C58B-20I/SS | PIC16C58B-04I/SS | PIC16C58B-20E/SS | PIC16C57C-20I/SS |
|---|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | 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 | 20-SSOP - same |
| Maximum Clock Frequency | 40 MHz | 40 MHz | 20 MHz | 4 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz |
| Program Memory | 3 KB OTP (2K x 12) | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 3 KB OTP | 2 KB OTP |
| RAM | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 72 bytes |
| Number of I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Temperature Grade | Commercial (0C to +70C) | Commercial | Commercial | Commercial | Industrial (-40C to +85C) | Industrial (-40C to +85C) | Extended (-40C to +125C) | Industrial (-40C to +85C) |
| Lifecycle Status | NRND | NRND | NRND | NRND | NRND | NRND | NRND | NRND |
Key Differentiators
- Highest clock speed available in the PIC16C58B family (vs PIC16C58BT-20/SS)
- Maximum program memory within the PIC16C5X SSOP-20 family (vs PIC16C57C-20I/SS)
- Wider operating temperature envelope in same SSOP-20 footprint (vs PIC16C58B-20I/SS)
Design Notes
PIC16C58B is OTP - firmware must be fully validated on a flash equivalent (PIC16F57) or windowed device before committing to production volumes. Once programmed, the OTP memory cannot be erased or rewritten, so any bug in the firmware ships in the field for the product's lifetime. Build a regression-test suite and a golden-image verification before authorizing the production programmer order.
Configure all unused I/O pins as outputs and tie them to VSS (logic low) to minimize CMOS shoot-through current. The PIC16C58B draws additional supply current when inputs float near the threshold; unused pins left as inputs can add several hundred microamps to the quiescent current. The watchdog timer should be disabled by software if not required, or the WDT prescaler adjusted to balance wakeup latency against idle current.
Place a 100 nF decoupling capacitor within 5 mm of the VDD pin, with a short, low-inductance trace to the VSS pin. For crystal oscillator configurations, keep the crystal and load capacitors close to OSC1/OSC2 and surround them with a ground guard ring to suppress noise coupling into the clock. The MCLR pin should have a 10 kohm pull-up to VDD and a 100 nF cap to VSS for noise immunity on reset.
Compliance Information
PIC16C58B is a legacy OTP family from the 1990s - explicit RoHS/REACH compliance status was not surfaced by the verified web data. Microchip's general policy is that legacy PIC16C parts are typically non-RoHS (Pb-bearing) and were designed before RoHS took effect. Mark rohs=unknown rather than fabricate compliance. AEC-Q100 not applicable - PIC16C58B is not automotive-qualified; for automotive applications use PIC16F57-Q1 or equivalent.
