PIC16C56-XTI/P - 8-bit 4MHz OTP MCU 1.5KB | Microchip
Teilenummer: PIC16C56-XTI/P ✗ Abgekündigt| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $2.85 | $2,85 |
| 10 | $2.55 | $25,50 |
| 100 | $2.1 | $210,00 |
| 500 | $1.78 | $890,00 |
| 1.000 | $1.52 | $1.520,00 |
PIC16C56-XTI/P Übersicht
An 8-bit microcontroller (MCU) is a single-chip computer built around a central processing unit with an 8-bit data path, integrated program memory, working RAM, and configurable I/O peripherals. The PIC16C5X family uses a RISC architecture with only 33 single-word/single-cycle instructions, providing predictable 1:1 instruction-to-clock timing that simplifies deterministic control firmware. As a member of the broader MCU hierarchy, this device sits at the simple-control end of the spectrum: PIC16C5X -> PIC16 family -> 8-bit PIC microcontrollers -> microcontrollers -> embedded computing -> semiconductors.
Key features include 12-bit-wide instruction words with 8-bit-wide data path, a two-level deep hardware stack, direct/indirect/relative addressing modes, and a single 8-bit Timer0 (TMR0) with an 8-bit prescaler. The device operates from 3.0V to 5.5V and is fabricated on a low-power CMOS process. Compared to its contemporaries in the same price band, the PIC16C5X family delivers roughly an order of magnitude higher performance per MHz.
The architecture uses a separate instruction and data bus (Harvard architecture) which allows instruction fetch and operand access to occur in the same clock cycle. The OTP EPROM enables low-volume prototyping and production without mask charges, making it suitable for mature products where Flash reprogrammability is not required and unit cost dominates.
Typical applications include low-cost appliance control, LED driver sequencers, simple sensor front-ends, and legacy industrial timer/controller modules that were designed around the PIC16C5X instruction set. Because the OTP variant is one-time programmable, this part is most often used in mature production runs where firmware is fixed.
When designing with this part, plan oscillator loading capacitor values to match the XT crystal specification (typically 15-33 pF) and ensure the MCLR reset circuit uses the correct pull-up topology. Designers migrating to modern Flash-based PICs should note that the PIC16C5X instruction set differs from later mid-range and enhanced mid-range PIC families, so code is not source-compatible.
Drop-in-Alternativen für PIC16C56-XTI/P – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Varianten dieser Serie
Modelle derselben Serie, die drop-in-kompatibel sind mit PIC16C56-XTI/P (gleiche Bauform und Footprint) – abweichend in Timers, Package, Core Architecture, Program Memory Type, Operating Temperature.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
PIC16C56-LPI/P
✅ Drop-In✓ Auf Lager
$1.09 / Stück
Datenblatt ansehen →PIC16C56-LP/P
✅ Drop-In✓ Auf Lager
$3.39 / Stück
Datenblatt ansehen →PIC16C56-HSI/P
✅ Drop-In✓ Auf Lager
$1.62 / Stück
Datenblatt ansehen →PIC16C56-RC/P
✅ Drop-In✓ Auf Lager
$4.65 / Stück
Datenblatt ansehen →PIC16C56-XTE/P
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
PIC16C56A-04E/P
✅ Drop-In ⚠️ Spezifikationen ungeprüft✓ Auf Lager
$1.21 / Stück
Datenblatt ansehen →PIC16C56-XTI/P Grenzwerte & elektrische Eigenschaften
| Product Family | PIC16C5X |
| Core Architecture | 8-bit RISC |
| Instruction Set Width | 12-bit |
| Number of Instructions | 33 |
| Program Memory Type | OTP EPROM |
| Program Memory Size | 1.5 KB (1K x 12) |
| RAM Size | 25 bytes |
| Maximale Taktfrequenz | 4 MHz |
| Oscillator Type | XT (external crystal/ceramic) |
| I/O Pins | 12 |
| Timers | 1 x 8-bit (TMR0) |
| Hardware Stack Depth | 2 levels |
| Versorgungsspannung | 3.0 V to 5.5 V |
| Betriebstemperatur | -40 C to +85 C (Industrial) |
| Gehäuse | 18-pin PDIP (through-hole) |
| Montageart | Through-Hole |
PIC16C56-XTI/P Pin-Konfiguration
| 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 |
| Pin 15 | OSC1/CLKIN — Oscillator crystal input / external clock input |
| Pin 16 | OSC2/CLKOUT — Oscillator crystal output / clock output (Fosc/4) |
| Pin 17 | RA0 — Bidirectional I/O port A bit 0 |
| Pin 18 | RA1 — Bidirectional I/O port A bit 1 |
Typische Anwendungen
PIC16C56-XTI/P ist geeignet für 6 Anwendungs: Low-Cost Appliance Control, LED Lighting Sequencer, Simple Sensor Front-End, Legacy Industrial Timer / Controller, Automotive Accessory Module (Pre-CAN Era), Educational and Hobbyist Microcontroller Trainer.
Low-Cost Appliance Control
The PIC16C56-XTI/P is a strong fit for low-cost appliance control boards that require a fixed-program MCU and a small number of I/O. With 1.5KB of OTP program memory, 12 digital I/O pins, and a 4MHz oscillator, it can drive relays, indicator LEDs, and sensor inputs in washing machines, microwave ovens, and simple HVAC controllers. The RISC 33-instruction set produces compact, deterministic code paths that fit within the 1K-word OTP, while the 3.0V-5.5V supply range allows direct connection to 5V rails common in appliance power supplies. Pairing the device with a discrete MCLR pull-up and XT crystal provides robust reset behavior during brownout events typical in motor-driven loads.
Empfohlen
LED Lighting Sequencer
For decorative LED lighting and signage sequencers, the PIC16C56-XTI/P provides enough I/O to drive 8-12 LED channels directly from its port pins, with the timer-controlled bit-banging achieving smooth PWM dimming within the 4MHz instruction cycle budget. The 1.5KB OTP stores fixed sequence patterns for marquees, channel-letter signs, and architectural accent lighting where firmware is locked at production. The 25-byte RAM is sufficient for sequence index variables and timing counters without external memory, and the 3.0V-5.5V range supports both 3.3V logic-level LED drivers and 5V high-current driver stages.
Empfohlen
Simple Sensor Front-End
In simple sensor front-ends (temperature, humidity, contact closure, or proximity), the PIC16C56-XTI/P reads analog sensors via external comparators and conditions digital inputs before transmitting results on a single GPIO. With 12 I/O pins it can sample 4-6 sensors, drive status LEDs, and bit-bang a UART or one-wire interface for downstream communication. The 4MHz oscillator supports deterministic sampling intervals, and the industrial -40C to +85C temperature grade allows deployment in outdoor or industrial environments without additional thermal management.
Empfohlen
Legacy Industrial Timer / Controller
For legacy industrial timer and controller modules designed around the PIC16C5X family, the PIC16C56-XTI/P provides a direct-fit replacement with proven long-term reliability. Its 8-bit TMR0 with 8-bit prescaler supports timing intervals from microseconds to seconds, suitable for conveyor control, batch counters, and process timers. The 1.5KB OTP holds fixed timing tables and state machines, while the 12 I/O pins interface with contactors, solenoids, and indicator panels. Because the part is obsolete, designers of legacy equipment use it for maintenance-of-existing-installation spares, not new platform designs.
Empfohlen
Automotive Accessory Module (Pre-CAN Era)
In pre-CAN-era automotive accessory modules such as basic alarm systems, interior lighting controllers, and seat-heater switches, the PIC16C56-XTI/P delivers the deterministic response time and ruggedness required for in-cabin electronics. The 4MHz instruction rate handles debounced switch scanning and relay control within tight response budgets. Although the part is not AEC-Q100 qualified, it is commonly used in cost-sensitive non-safety automotive accessories where 12V battery transients are filtered by external regulators. For new automotive designs, AEC-Q100-qualified PIC16F or dsPIC families are recommended.
Empfohlen
Educational and Hobbyist Microcontroller Trainer
The PIC16C56-XTI/P is widely used in educational microcontroller trainer boards and hobbyist projects because its 33-instruction RISC core is straightforward to teach and its 18-pin PDIP package is breadboard-friendly. With 12 I/O pins it can drive character LCDs, pushbuttons, LEDs, and serial EEPROMs to demonstrate fundamental embedded concepts like GPIO, timers, and simple state machines. The 1.5KB OTP requires students to commit code via a programmer before each iteration, reinforcing the development workflow. Instructors often pair it with the Microchip MPLAB PM3 programmer for lab exercises.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für PIC16C56-XTI/P – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | PIC16C56-LPI/P | PIC16C56-LP/P | PIC16C56-HSI/P | PIC16C56-RC/P | PIC16C56-XTE/P | PIC16C56A-04E/P |
|---|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package | 18-pin PDIP | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same | 18-pin PDIP - same |
| Program Memory | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP | 1.5 KB OTP |
| I/O Pins | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Max Clock Frequency | 4 MHz (XT) | 200 kHz (LP) | 200 kHz (LP) | 20 MHz (HS) | ~4 MHz (RC) | 4 MHz (XT) | 4 MHz |
| Operating Temperature | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) | -40C to +85C (Industrial) | 0C to +70C (Commercial) | -40C to +85C (Industrial) |
| RAM | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes | 25 bytes |
| 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 |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete | Obsolete |
Wichtigste Unterscheidungsmerkmale
- XT oscillator at 4 MHz balanced for industrial temp range (vs. PIC16C56-LPI/P)
- Higher-frequency ceiling available in same package (vs. PIC16C56-HSI/P)
- Pin-identical PIC16C56A revision for next-generation designs (vs. PIC16C56A-04E/P)
Designhinweise
The PIC16C56-XTI/P operates from 3.0V to 5.5V; design the power supply with bulk decoupling of 10-100uF plus a 0.1uF ceramic bypass placed within 5mm of the VDD pin. For 5V systems drawing digital I/O into capacitive loads, add a series ferrite bead on VDD to reduce switching noise coupling into the analog comparator reference (if used externally). The MCLR pin requires a pull-up to VDD; a 10 kohm resistor with a 100 nF capacitor to ground creates a power-on reset delay.
The 18-pin PDIP footprint is a 0.300-inch-wide package with 0.100-inch pin pitch. Place the XT crystal and its two 15-33 pF load capacitors within 10 mm of the OSC1/OSC2 pins to minimize parasitic capacitance and stray noise pickup. Keep digital switching traces away from the OSC1/OSC2 lines, and route MCLR separately from high-current traces to avoid false resets during load transients.
Because the PIC16C56-XTI/P uses One-Time-Programmable EPROM, every firmware iteration requires a fresh part - do not design new products around this MCU. When migrating, the PIC16F84A or PIC16F628A offer Flash reprogrammability, larger memory, and the more capable 14-bit mid-range instruction set at comparable cost. Note also that the PIC16C5X 12-bit instruction set is NOT source-compatible with PIC16F mid-range parts; code rewrite is required.
Compliance-Informationen
PIC16C56-XTI/P is a legacy OTP EPROM part predating widespread RoHS documentation requirements; compliance status not confirmed in the verified web data and should be verified with the manufacturer for new designs requiring RoHS/REACH conformance.
