PIC16C58B/JW - 8-Bit 20MHz UV EPROM MCU 18-CERDIP | Microchip
MPN: PIC16C58B/JW ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $18.5 | $18.50 |
| 10 | $16.2 | $162.00 |
| 100 | $13.75 | $1,375.00 |
| 500 | $11.4 | $5,700.00 |
| 1,000 | $9.85 | $9,850.00 |
PIC16C58B/JW Overview
A microcontroller (MCU) is a single-chip computer that integrates a CPU core, program memory, working RAM, and peripheral I/O into one IC. The PIC16C5X family occupies the entry-level tier of 8-bit microcontrollers, optimized for cost-sensitive, deterministic control tasks where simple I/O handling, low power, and small code footprints are paramount. These MCUs sit in the broader hierarchy of embedded computing as: microcontroller -> 8-bit MCU -> RISC MCU -> embedded processor -> semiconductor. The JW windowed CERDIP package distinguishes this part from the OT (one-time-programmable) CERDIP version by allowing UV erasure for repeated firmware development cycles.
Key features include 8-bit data width, 20MHz maximum clock, 12 bidirectional digital I/O pins, a 2K x 12 program word organization, 8-bit timer/counter with 8-bit prescaler, watchdog timer with on-chip RC oscillator, power-on reset, and a 2.5V to 6.0V operating voltage range. The instruction set provides 33 single-word, single-cycle instructions, all executed in 200ns at 20MHz, simplifying code generation and timing analysis. Power-saving SLEEP mode reduces quiescent current to below 1 microampere for battery-friendly applications.
Architecturally, the PIC16C5X uses a Harvard-style RISC core with a 12-bit program word and a separate 8-bit data path. The fully static CMOS design eliminates minimum clock rate restrictions, allowing the part to be clock-stepped for low-power or synchronous debugging. Code protection is supported via fuse bits, and the JW windowed package enables direct UV erasure of the EPROM, making this variant the preferred choice for engineering development, prototyping, and low-volume production where firmware iterations are expected.
Typical applications include appliance controllers, HVAC damper and fan control, security keypads, sensor signal conditioning front-ends, automotive body-electronics nodes, battery chargers, simple remote-control transmitters, and educational microcontroller trainers. The PIC16C5X instruction set and pinout also make this part a drop-in-compatible base for legacy designs that began development in the early 1990s. When designing, reserve the 18-pin CERDIP window for a UV eraser lid if firmware changes are expected, and budget for a 73-byte RAM ceiling, which is sufficient for small state machines but constrains stack depth and buffer-heavy code.
For a JW windowed part, plan a UV erasure station with a 12,000 uW-sec/cm² rated lamp and a 20-30 minute exposure time. A ceramic window sticker or opaque label must cover the window after programming to prevent data corruption from ambient light. This page synthesizes distributor pricing, verified drop-in compatible PIC16C5X alternatives, and design notes that complement the manufacturer datasheet.
Drop-in alternatives for PIC16C58B/JW — 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/JW (same form factor and footprint) — differing in Package, RoHS Status, Timers, Program Memory Size, Program Memory Type.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PIC16C58B-20/P
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16C58B-04/P
✅ Drop-In✓ In Stock
$2.55 / Unit
View Datasheet →PIC16C58B-20I/P
✅ Drop-In✓ In Stock
$1.55 / Unit
View Datasheet →PIC16F57-I/P
✅ Drop-In📋 Reference alternative (not in catalog)
PIC16C57-XT/P
✅ Drop-In✓ In Stock
$2.95 / Unit
View Datasheet →PIC16C58B/JW Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit RISC (PIC16C5X family) |
| Program Memory Type | EPROM (UV-erasable windowed) |
| Program Memory Size | 3KB (2K x 12) |
| RAM | 73 bytes |
| Maximum CPU Frequency | 20 MHz |
| Instruction Set | 33 single-word, single-cycle instructions |
| Instruction Cycle Time | 200 ns at 20 MHz |
| I/O Pins | 12 |
| Timers | 1 x 8-bit timer/counter with 8-bit prescaler |
| Watchdog Timer | Yes, with on-chip RC oscillator |
| Operating Voltage | 2.5 V to 6.0 V |
| Package | 18-pin CERDIP windowed (JW) |
| Mounting Type | Through-hole |
| Temperature Grade | Commercial |
PIC16C58B/JW Pin Configuration
| Pin 1 | RA2 — Bidirectional I/O port A bit 2 |
| Pin 2 | RA3 — Bidirectional I/O port A bit 3 |
| Pin 3 | RA4/T0CKI — Bidirectional I/O port A bit 4 / Timer0 clock input |
| Pin 4 | MCLR — Master clear reset input (active low) |
| Pin 5 | VSS — Ground reference |
| Pin 6 | RB0 — Bidirectional I/O port B bit 0 |
| Pin 7 | RB1 — Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 — Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 — Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 — Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 — Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 — Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 — Bidirectional I/O port B bit 7 |
| Pin 14 | VDD — Positive supply voltage (2.5V to 6.0V) |
| Pin 15 | OSC2 — Oscillator output / crystal connection |
| Pin 16 | OSC1 — Oscillator input / crystal connection |
| Pin 17 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 18 | RA1 — Bidirectional I/O port A bit 1 |
Typical Applications
PIC16C58B/JW is suitable for 6 applications: Appliance Control Front Panel, HVAC Damper and Fan Motor Controller, Security Keypad and Access Controller, Simple Remote Control Transmitter, Educational Microcontroller Trainer, Legacy Automotive Body Electronics Node.
Appliance Control Front Panel
The PIC16C58B/JW is well matched to legacy appliance control panels (washing machines, dishwashers, microwave ovens) where a 3 KB EPROM, 12 I/O lines, and a single 8-bit timer are sufficient to drive a 7-segment display, scan a 4x4 keypad, and switch a few relays. The 20 MHz RISC core delivers 5 MIPS, providing deterministic response to button presses and sensor inputs without jitter. The 2.5V-6.0V operating range allows direct 5V drop-in usage from the appliance's existing linear supply. Compared to a modern PIC16F57, the JW windowed package allows firmware iteration during development, which shortens time to production for small appliance SKUs.
Recommended
HVAC Damper and Fan Motor Controller
The PIC16C58B/JW suits small HVAC damper actuators and fan-speed controllers because its 12 I/O pins can directly drive TRIAC optocouplers, capture zero-crossing signals, and read NTC thermistor inputs via the built-in ADC-less comparator. The 8-bit timer/counter with 8-bit prescaler generates the PWM or phase-angle control needed for AC motor speed regulation. Operating from 2.5V-6.0V, the MCU can share the 5V standby rail of the HVAC control board. The JW windowed package lets the firmware be re-erased and re-programmed as the motor-control algorithm is tuned in the lab.
Recommended
Security Keypad and Access Controller
Security keypads for door access and alarm arm/disarm panels use the PIC16C58B/JW because the 33 single-cycle RISC instructions make the keypad-debounce and PIN-validation code trivially small, and the 73-byte RAM is sufficient for storing one PIN buffer and a small audit log. The 12 I/O pins drive the 4x4 matrix keypad, status LEDs, and a relay to the door strike without external I/O expanders. The watchdog timer with on-chip RC oscillator provides the integrity check needed for fail-safe alarm panels. The JW variant allows secure firmware updates during installation without replacing the OTP equivalent.
Recommended
Simple Remote Control Transmitter
Garage-door openers, ceiling-fan remotes, and toy remote controls use the PIC16C58B/JW as a low-cost transmitter MCU, where 3 KB of EPROM is enough for the IR/RF encoding tables, the timer drives the carrier frequency, and the SLEEP mode drops quiescent current to under 1 uA for long battery life. The 2.5V minimum VDD allows operation directly from a single CR2032 coin cell. The JW windowed package lets the OEM re-use one hardware design across multiple SKUs by re-programming only the EPROM.
Recommended
Educational Microcontroller Trainer
Universities and trade schools use the PIC16C58B/JW in 8-bit microcontroller training labs because the 33-instruction RISC architecture is small enough to teach in one semester, and the JW windowed CERDIP allows students to repeatedly erase and re-program the device with their lab exercises. The 18-pin DIP through-hole package is breadboard-friendly, so students can wire I/O without soldering. The 20 MHz instruction rate is slow enough to step-debug with simple logic analyzers, and the well-documented instruction set is supported by decades of teaching materials.
Recommended
Legacy Automotive Body Electronics Node
Older automotive body-electronics modules (window lifters, mirror controllers, seat-position memories) use the PIC16C58B/JW because of its compact code footprint, 12 I/O lines, and ability to operate across automotive temperature swings in the -I industrial variant. The single 8-bit timer captures Hall-sensor pulses for motor commutation, and the watchdog timer ensures the module resets in the event of an EMI-induced lockup. The 5V operation aligns with legacy 12V-bus-derived rails. The JW windowed package supports field firmware updates in dealer service bays.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C58B/JW — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16C58B-20/P | PIC16C58B-04/P | PIC16C58B-20I/P | PIC16F57-I/P | PIC16C57-XT/P |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-CERDIP (JW windowed) | 18-PDIP (OTP) | 18-PDIP (OTP) | 18-PDIP (OTP) | 18-PDIP (Flash) | 18-PDIP (OTP) |
| Program Memory | 3 KB EPROM (2K x 12) | 3 KB EPROM | 3 KB EPROM | 3 KB EPROM | 3 KB Flash | 2 KB EPROM |
| RAM | 73 bytes | 73 bytes | 73 bytes | 73 bytes | 72 bytes | 72 bytes |
| Max CPU Frequency | 20 MHz | 20 MHz | 4 MHz | 20 MHz | 20 MHz | 4 MHz |
| Memory Type | UV-EPROM (windowed) | OTP EPROM | OTP EPROM | OTP EPROM | Flash | OTP EPROM |
| Temperature Grade | Commercial | Commercial | Commercial | Industrial | Industrial | Commercial |
| Operating Voltage | 2.5V to 6.0V | 2.5V to 6.0V | 2.5V to 6.0V | 2.5V to 6.0V | 2.0V to 5.5V | 2.5V to 6.0V |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Active | Obsolete |
Key Differentiators
- UV-erasable windowed package for firmware iteration (vs PIC16C58B-20/P)
- Active-production Flash alternative for new designs (vs PIC16F57-I/P)
- 3 KB EPROM vs 2 KB EPROM for larger firmware (vs PIC16C57-XT/P)
Design Notes
Estimated: A JW windowed part can be erased only with a UV lamp rated at 12,000 uW-sec/cm^2 for 20-30 minutes; ambient sunlight through a window will not erase it but fluorescent lighting can degrade stored charge over weeks. After programming, cover the quartz window with an opaque label to prevent data corruption from stray UV. Failure to cover the window is a common cause of field failures in PIC16C5X-based products.
The PIC16C58B/JW operates from 2.5V to 6.0V, but maximum 20 MHz operation requires VDD >= 4.5V. For 3.3V systems, derate the clock to 10 MHz or use the PIC16F57-I/P which supports 20 MHz down to 2.0V. Place a 100 nF decoupling capacitor as close to the VDD pin (14) as possible, and add a 10 uF bulk capacitor on the supply rail. The MCLR pin (4) should be tied to VDD through a 10 kohm pull-up; a 100 nF capacitor on MCLR provides a clean power-on reset.
Keep the OSC1/OSC2 traces short and symmetric, and route them away from RB port switching lines to avoid coupling clock noise into the digital I/O. For a 20 MHz crystal, use a fundamental-mode cut with 15-33 pF load capacitors matched to the crystal's specification. If using an external CMOS clock, drive only OSC1 and leave OSC2 floating. The MCLR trace should not run parallel to high-current switching signals to prevent false resets from crosstalk.
The CERDIP package has a higher thermal resistance than plastic DIP (approximately 100 C/W theta_JA), so the PIC16C58B/JW runs warmer at high ambient temperatures. This is rarely a concern for the 8-bit PIC16C5X family because the core draws only a few mA, but in sealed enclosures at industrial temperature grades (-40 to +85 C) confirm that the device dissipation stays below 200 mW. Forced airflow is not typically required.
Compliance Information
The JW windowed CERDIP package contains a quartz window and ceramic body with lead-based solder, making it non-RoHS by definition. Microchip has not published a current RoHS statement for this obsolete part; the -04I/P and -20I/P industrial variants are not AEC-Q100 qualified and should not be used in safety-critical automotive systems without additional qualification.
