PIC16C57-10I/SO - 8-Bit 10MHz OTP MCU 3KB | Microchip
MPN: PIC16C57-10I/SO β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.3 | $7.30 |
| 10 | $6.57 | $65.70 |
| 100 | $5.84 | $584.00 |
| 500 | $5.11 | $2,555.00 |
| 1,000 | $4.38 | $4,380.00 |
PIC16C57-10I/SO Overview
An 8-bit microcontroller (MCU) is a small computer-on-a-chip integrating an 8-bit CPU core, program memory (ROM/EPROM/Flash/OTP), data RAM, and peripherals such as timers, I/O ports, and interrupts. Within the broader taxonomy, the PIC16C57 belongs to the 8-bit MCU -> microcontroller -> embedded processor -> semiconductor device family. The "C" suffix indicates CMOS EPROM-based program memory, while the "OTP" variant allows a single user programming cycle, ideal for low-to-medium volume production runs where mask-ROM NRE costs are uneconomical.
Key features include 20 digital I/O pins organized across ports RA-RC, a single 8-bit Timer0 (TMR0) with programmable prescaler, a two-level deep hardware stack, and Harvard architecture with 12-bit wide instructions and 8-bit data path. The PIC16C57 supports 33 single-word instructions, DC to 10 MHz operation, and offers 4 oscillator modes (RC, LP, XT, HS) for design flexibility across low-power and high-speed clocking. Watchdog timer and power-on reset enhance field reliability, and the 8-bit real-time clock/counter supports event timing without software overhead.
Typical applications include appliance control, automotive body electronics, industrial sensor interfaces, low-end consumer products, smart sensors, LED lighting controllers, and battery-powered embedded systems. The wide operating voltage (typically 2.5 V to 6.0 V) and low power consumption suit both line-powered and battery-backed designs.
When designing with the PIC16C57, note that the OTP memory cannot be re-programmed, so production code must be validated on EPROM-windowed (JW) samples first. The 2-level hardware stack limits subroutine nesting to two levels - C compilers and high-level languages are not supported, and the developer must write in PIC assembly or use a state-machine coding style.
Drop-in alternatives for PIC16C57-10I/SO 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 PIC16C57-10I/SO (same form factor and footprint) β differing in Package, Program Memory Size, Program Memory Type, Timers.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
PIC16F57-I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C57-10E/SO
β Drop-Inβ In Stock
$2.62 / Unit
View Datasheet βPIC16C57-10/P
β Drop-Inβ In Stock
$2.95 / Unit
View Datasheet βPIC16C58B-10I/SO
β Drop-Inπ Reference alternative (not in catalog)
PIC16C56-10I/SO
β Drop-Inβ In Stock
$2.95 / Unit
View Datasheet βPIC16C57-10I/SO Maximum Ratings & Electrical Characteristics
| Core Architecture | 8-bit PIC16C5X (Harvard, RISC) |
| Program Memory Type | OTP (One-Time-Programmable) EPROM |
| Program Memory Size | 3 KB (2K x 12 words) |
| RAM Size | 72 bytes |
| Instruction Set Width | 12-bit instructions, 8-bit data path |
| Number of Instructions | 33 single-word |
| Maximum Clock Frequency | 10 MHz |
| CPU Speed | 10 MIPS (5 MHz input = 5 MIPS) |
| Number of I/O Pins | 20 |
| Timers | 1 x 8-bit (TMR0) with prescaler |
| Hardware Stack Depth | 2 levels |
| Oscillator Modes | RC, LP, XT, HS (4 modes) |
| Operating Temperature Range | -40 Β°C to +85 Β°C (industrial) |
| Package | 28-pin SOIC (0.295", 7.50 mm width) |
| Mounting Type | Surface Mount |
| Peripherals | Watchdog Timer, Power-On Reset |
PIC16C57-10I/SO 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 | RTCC β Real-time clock/counter (TMR0) input |
| Pin 4 | MCLR β Master clear reset (active low) |
| Pin 5 | VSS β Ground reference |
| Pin 6 | RB0 β Bidirectional I/O port B bit 0 |
| Pin 7 | RB1 β Bidirectional I/O port B bit 1 |
| Pin 8 | RB2 β Bidirectional I/O port B bit 2 |
| Pin 9 | RB3 β Bidirectional I/O port B bit 3 |
| Pin 10 | RB4 β Bidirectional I/O port B bit 4 |
| Pin 11 | RB5 β Bidirectional I/O port B bit 5 |
| Pin 12 | RB6 β Bidirectional I/O port B bit 6 |
| Pin 13 | RB7 β Bidirectional I/O port B bit 7 |
| Pin 14 | VSS β Ground reference |
| Pin 15 | OSC1 β Oscillator input / external clock input |
| Pin 16 | OSC2 β Oscillator output (crystal/ceramic mode) |
| Pin 17 | RC0 β Bidirectional I/O port C bit 0 |
| Pin 18 | RC1 β Bidirectional I/O port C bit 1 |
| Pin 19 | RC2 β Bidirectional I/O port C bit 2 |
| Pin 20 | RC3 β Bidirectional I/O port C bit 3 |
| Pin 21 | RC4 β Bidirectional I/O port C bit 4 |
| Pin 22 | RC5 β Bidirectional I/O port C bit 5 |
| Pin 23 | RC6 β Bidirectional I/O port C bit 6 |
| Pin 24 | RC7 β Bidirectional I/O port C bit 7 |
| Pin 25 | VSS β Ground reference |
| Pin 26 | VDD β Positive supply voltage |
| Pin 27 | RA0 β Bidirectional I/O port A bit 0 |
| Pin 28 | RA1 β Bidirectional I/O port A bit 1 |
Typical Applications
PIC16C57-10I/SO is suitable for 6 applications: Appliance Control (White Goods), Industrial Sensor Interfaces, LED Lighting Controllers, Automotive Body Electronics, Low-End Consumer Electronics, Battery-Powered Sensor Nodes.
Appliance Control (White Goods)
The PIC16C57-10I/SO is well suited for appliance control in washing machines, dishwashers, and microwave ovens, where its 20 I/O pins can drive relays, sensors, and 7-segment displays while the 3 KB OTP program memory holds the main control state machine. The 10 MHz clock rate (10 MIPS) provides fast enough response for motor PWM feedback loops and user-interface debounce handling, and the -40 Β°C to +85 Β°C industrial temperature range covers the kitchen environment. Cost-optimized OTP memory suits high-volume white goods where firmware is locked at production.
Recommended
Industrial Sensor Interfaces
The PIC16C57-10I/SO excels at industrial sensor interface modules, where its 20 I/O pins multiplex multiple analog/digital sensor inputs, its Timer0 captures pulse-width signals from flow meters or proximity sensors, and its 8-bit core executes deterministic scan loops under 100 Β΅s. The 4 MHz RC oscillator option supports low-power remote sensor nodes, while the 10 MHz HS mode handles higher-throughput protocols like 4-20 mA loop digitizers. The OTP memory prevents field tampering with calibration data.
Recommended
LED Lighting Controllers
The PIC16C57-10I/SO is ideal for LED lighting controllers, where its 20 I/O pins drive multiple LED channels via PWM-like bit-banging, its 3 KB OTP memory stores lighting patterns and dimming curves, and its CMOS design minimizes quiescent current for always-on fixtures. The 8-bit Timer0 generates accurate 1 ms time bases for dimming, and the 28-SOIC package allows compact PCB layouts. The wide 2.5 V to 6.0 V supply range supports both 3.3 V and 5 V LED driver designs.
Recommended
Automotive Body Electronics
The PIC16C57-10I/SO is widely deployed in automotive body electronics such as seat controllers, mirror adjusters, and HVAC blend-door actuators, where its -40 Β°C to +85 Β°C industrial range covers cabin environments and its 3 KB OTP memory locks production firmware. The 20 I/O pins drive multiple brushed DC motors and read Hall-effect position sensors, while the 10 MIPS throughput handles LIN or simple UART communication with body control modules. For under-hood 125 Β°C applications, choose the PIC16C57-10E/SO extended-temperature variant.
Recommended
Low-End Consumer Electronics
The PIC16C57-10I/SO is a workhorse for low-end consumer products like remote controls, toys, and small kitchen gadgets, where cost is paramount and the 3 KB OTP memory holds sufficient feature logic. Its 20 I/O pins interface directly to keypads, IR LEDs, buzzers, and low-resolution LCDs without external logic, and the simple 33-instruction RISC core keeps firmware development fast. The 28-SOIC surface-mount package supports automated PCB assembly at high volumes.
Recommended
Battery-Powered Sensor Nodes
The PIC16C57-10I/SO serves well in battery-powered sensor nodes for HVAC monitoring, agricultural soil sensors, and remote metering, where the CMOS core draws minimal current and the LP oscillator mode supports 32 kHz crystal operation for sub-mA average consumption. The 3 KB OTP memory holds application firmware plus calibration tables, and the 8-bit Timer0 wakes the core periodically for sensor reading and RF transmission. Industrial temperature grade handles outdoor enclosures in temperate climates.
Recommended
Recommended Products Summary
Engineering reference data for PIC16C57-10I/SO β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC16F57-I/SO | PIC16C57-10E/SO | PIC16C58B-10I/SO |
|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 28-SOIC (0.295", 7.50 mm) | 28-SOIC - same | 28-SOIC - same | 28-SOIC - same |
| Program Memory | 3 KB OTP | 3 KB Flash | 3 KB OTP | 2 KB OTP |
| RAM | 72 bytes | 72 bytes | 72 bytes | 73 bytes |
| Max Clock Frequency | 10 MHz | 20 MHz | 10 MHz | 10 MHz |
| I/O Pins | 20 | 20 | 20 | 20 |
| Operating Temperature | -40 Β°C to +85 Β°C | -40 Β°C to +85 Β°C | -40 Β°C to +125 Β°C | -40 Β°C to +85 Β°C |
| Memory Type | OTP (one-time programmable) | Flash (re-programmable) | OTP | OTP |
| Core Architecture | PIC16C5X (8-bit) | PIC16F5X (8-bit) | PIC16C5X (8-bit) | PIC16C5X (8-bit) |
Key Differentiators
- Re-programmable Flash memory in same package (vs PIC16F57-I/SO)
- Extended automotive temperature range (vs PIC16C57-10E/SO)
- Compact 28-SOIC surface-mount package (vs PIC16C57-10/P)
Design Notes
The PIC16C5X family has only a 2-level hardware stack, so subroutines cannot nest more than 2 deep. Do not use recursive functions or call chains deeper than 2 in PIC assembly. If you need deeper call nesting, refactor into state machines (computed GOTO/JUMP tables). Compiled C is not supported on the PIC16C5X core - all firmware must be hand-written or generated by an assembly-language state-machine tool.
Add a 100 nF ceramic decoupling capacitor as close as possible to the VDD pin (pin 26) and a bulk capacitor (10 Β΅F to 100 Β΅F) on the supply rail. The MCLR pin (pin 4) requires a 10 kΞ© pull-up to VDD for reliable reset; if used as a manual reset input, add a 100 nF cap to ground for noise filtering. Watchdog timer enable/disable must be configured in the configuration word at programming time - it cannot be turned on or off at runtime via software.
Place the 28-SOIC package on a 0.295" (7.50 mm) SOIC land pattern with 1.27 mm pitch. Route MCLR with a short trace to the pull-up resistor to minimize noise coupling. If using a crystal oscillator (XT or HS mode), keep the crystal and load capacitors within 5 mm of the OSC1/OSC2 pins and guard the traces with a ground ring to reduce EMI. For RC oscillator mode at low frequencies, place the timing resistor and capacitor close to OSC1 to minimize stray capacitance.
Compliance Information
Compliance status not explicitly stated in verified distributor data. The PIC16C57-10I/SO is an older mature product; RoHS/REACH compliance should be confirmed with Microchip directly via the product page. Not AEC-Q100 qualified - choose PIC16C57-10E/SO with extended temperature for harsh automotive environments.
