PIC16C55-LP/P - 8-Bit 40MHz OTP MCU 768B | Microchip | DIP-28
Référence : PIC16C55-LP/P ✗ Fin de vie| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $2.4486 | $2,45 |
| 10 | $2.2 | $22,00 |
| 100 | $1.95 | $195,00 |
| 500 | $1.7 | $850,00 |
| 1 000 | $1.45 | $1 450,00 |
PIC16C55-LP/P Présentation
An 8-bit microcontroller is a single-chip computer containing a CPU, program memory, data RAM, and programmable I/O peripherals on one die. Within the broader semiconductor taxonomy, the PIC16C55 belongs to the hierarchy: microcontroller -> embedded MCU -> 8-bit MCU -> CMOS RISC microcontroller -> semiconductor IC. The PIC16C5X family uses a Harvard architecture with separate program and data buses, enabling simultaneous instruction fetch and data access for higher throughput.
Key features include 20 I/O pins, an 8-bit real-time clock/counter (TMR0) with an 8-bit prescaler, a watchdog timer (WDT) with its own on-chip RC oscillator for reliable operation, power-on reset (POR), and a two-level hardware stack. The OTP program memory allows one-time field programming via Microchip device programmers such as the MPLAB PM3, making the part suitable for prototype and low-volume production runs.
The PIC16C55 employs an enhanced CMOS process with fully static design, meaning the clock can be stopped without losing internal register state - a feature useful for power-sensitive applications. Its RISC architecture with only 33 single-word instructions and mostly single-cycle execution provides deterministic timing suitable for real-time control. The 12-bit instruction word delivers approximately 2:1 code compression over competing 8-bit architectures.
Typical applications include appliance control, automotive body electronics, industrial control logic, sensor signal conditioning, low-cost consumer products, and legacy embedded systems. The wide operating temperature range and OTP memory make it well-suited to cost-sensitive, fixed-function embedded products.
When designing with this part, consider that OTP memory cannot be reprogrammed, so code must be fully validated before committing to production. For new designs, Microchip recommends flash-based PIC16F successors such as the PIC16F54 for drop-in compatibility and re-programmability.
This page consolidates distributor pricing, drop-in alternatives, parametric comparisons and practical design notes to help engineers rapidly evaluate the PIC16C55-LP/P for both new designs and legacy maintenance scenarios.
Alternatives de remplacement direct pour PIC16C55-LP/P — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Variantes de cette série
Modèles de la même série directement compatibles avec PIC16C55-LP/P (même facteur de forme et même empreinte) — différant par Package, Program Memory Size, Program Memory Type, Timers, Core Architecture.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
PIC16C55-HS/P
✅ Remplacement direct✓ En stock
$3.95 / unité
Voir la fiche technique →PIC16C55-10/P
✅ Remplacement direct✓ En stock
$3.65 / unité
Voir la fiche technique →PIC16C55/JW
✅ Remplacement direct✓ En stock
$10.4 / unité
Voir la fiche technique →PIC16F54-I/P
✅ Remplacement direct✓ En stock
$0.68 / unité
Voir la fiche technique →PIC16C55A-20I/P
✅ Remplacement direct✓ En stock
$1.6 / unité
Voir la fiche technique →PIC16C554-04/P
✅ Remplacement direct✓ En stock
$2.85 / unité
Voir la fiche technique →PIC16C55-LP/P Valeurs maximales et caractéristiques électriques
| Core | PIC16C5X 8-bit RISC |
| Instruction Set Architecture | 12-bit wide instructions, Harvard |
| Program Memory Type | OTP (One-Time Programmable) |
| Program Memory Size | 768 B (512 x 12-bit words) |
| Data RAM | 24 B |
| Fréquence d'horloge maximale | 40 MHz |
| Oscillator Type (LP suffix) | Low-power external RC/crystal |
| Number of I/O Pins | 20 |
| Timers | 1 x 8-bit (TMR0) with 8-bit prescaler |
| Watchdog Timer (WDT) | Yes, with on-chip RC oscillator |
| Power-On Reset (POR) | Yes |
| Hardware Stack | 2 levels |
| Addressing Modes | Direct, Indirect, Relative |
| Number of Instructions | 33 single-word |
| Boîtier | 28-pin PDIP (DIP-28, 0.6 inch width) |
| Type de montage | Through-Hole |
Configuration des broches de PIC16C55-LP/P
| Broche 1 | RA2 — Port A bit 2 (bidirectional I/O) |
| Broche 2 | RA3 — Port A bit 3 (bidirectional I/O) |
| Broche 3 | RA4/T0CKI — Port A bit 4 / Timer0 clock input |
| Broche 4 | MCLR — Master clear (reset) input, active low |
| Broche 5 | VSS — Ground reference |
| Broche 6 | RB0/INT — Port B bit 0 / external interrupt input |
| Broche 7 | RB1 — Port B bit 1 (bidirectional I/O) |
| Broche 8 | RB2 — Port B bit 2 (bidirectional I/O) |
| Broche 9 | RB3 — Port B bit 3 (bidirectional I/O) |
| Broche 10 | RB4 — Port B bit 4 (bidirectional I/O) |
| Broche 11 | RB5 — Port B bit 5 (bidirectional I/O) |
| Broche 12 | RB6 — Port B bit 6 (bidirectional I/O) |
| Broche 13 | RB7 — Port B bit 7 (bidirectional I/O) |
| Broche 14 | VSS — Ground reference (second VSS) |
| Broche 15 | OSC1 — Oscillator input (LP crystal/RC) |
| Broche 16 | OSC2 — Oscillator output (LP crystal/RC) |
| Broche 17 | RC0 — Port C bit 0 (bidirectional I/O) |
| Broche 18 | RC1 — Port C bit 1 (bidirectional I/O) |
| Broche 19 | RC2 — Port C bit 2 (bidirectional I/O) |
| Broche 20 | RC3 — Port C bit 3 (bidirectional I/O) |
| Broche 21 | RC4 — Port C bit 4 (bidirectional I/O) |
| Broche 22 | RC5 — Port C bit 5 (bidirectional I/O) |
| Broche 23 | RC6 — Port C bit 6 (bidirectional I/O) |
| Broche 24 | RC7 — Port C bit 7 (bidirectional I/O) |
| Broche 25 | RA0 — Port A bit 0 (bidirectional I/O) |
| Broche 26 | RA1 — Port A bit 1 (bidirectional I/O) |
| Broche 27 | VDD — Positive supply voltage |
| Broche 28 | VDD — Positive supply voltage (second VDD) |
Applications typiques
PIC16C55-LP/P convient pour 6 applications: Appliance Control, Automotive Body Electronics, Industrial Control Logic, Sensor Signal Conditioning, Low-Cost Consumer Products, Legacy Embedded Maintenance.
Appliance Control
The PIC16C55-LP/P suits appliance control boards where fixed firmware and low unit cost dominate the BOM. The 20 I/O pins directly drive relays, triacs, LEDs and seven-segment displays, while TMR0 plus watchdog timer manage washing-machine timing, microwave duty cycles and HVAC fan control. The 40 MHz LP clock reaches 10 MHz LP-range operation with deterministic single-cycle instructions, ideal for closed-loop PID loops. Designers pair it with the ULN2003 driver array, and choose OTP for sub-$0.50 firmware cost at 100k+ volume.
Recommandé
Automotive Body Electronics
Legacy automotive body modules - seat controllers, window lifters, mirror adjusters, simple lighting controllers - were designed around the PIC16C55-LP/P. Its wide operating voltage tolerates 12 V automotive rails with proper regulation, while the watchdog timer with on-chip RC oscillator provides the autonomous fault recovery demanded by ISO 7637 transient environments. The LP oscillator driver suits the low-frequency clocks used in body modules. Engineers maintain these products via PIC16F54 migration or PIC16C55-HS/P for higher-speed variants.
Recommandé
Industrial Control Logic
Factory-floor PLCs, motor starters and conveyor controllers historically leveraged the PIC16C55-LP/P for fixed-function glue logic. Its deterministic instruction timing executes deterministic control loops without RTOS overhead, while 20 I/O bits interface to opto-isolated inputs and zero-cross triac outputs. The two-level hardware stack limits subroutine depth but matches ladder-logic replacement applications. Designers replace it with PIC16F54-I/P for in-system reprogrammability in calibration/test fixtures.
Recommandé
Sensor Signal Conditioning
Simple sensor signal-conditioning boards - thermocouple cold-junction compensation, RTD linearization, bridge excitation - use the PIC16C55-LP/P for fixed lookup-table conversion. With TMR0 capturing period/frequency inputs and 20 I/O driving MUX/PGAs, the part delivers calibrated analog outputs to higher-level controllers. The 768-byte OTP stores calibration coefficients unique to each sensor batch. Maintain production by stocking PIC16C55-LP/P or migrating to PIC16F54-I/P.
Recommandé
Low-Cost Consumer Products
Toy controllers, remote controls, fitness bands and disposable medical blister-pack electronics rely on the PIC16C55-LP/P for sub-$1 BOM cost with adequate compute. The LP oscillator draws minimal current from coin-cell or AAA batteries; the on-chip watchdog keeps firmware responsive during battery droop. Although obsolete, Microchip authorized distributors still supply PIC16C55-LP/P for these legacy high-volume products where redesign cost exceeds ongoing part cost.
Recommandé
Legacy Embedded Maintenance
Repair depots and long-life programs (medical, aerospace, industrial) maintain installed PIC16C55-LP/P based boards for 15-25 year service windows. The PIC16C55-LP/P remains the only authentic replacement for these designs; the PIC16F54-I/P serves as a flash-based substitute when the firmware is updated. Stockpile PIC16C55-LP/P at OEM-quantity pricing for repair inventory and consider Microchip's product-change notification system for last-time-buy opportunities.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour PIC16C55-LP/P — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | PIC16C55-HS/P | PIC16C55-10/P | PIC16F54-I/P | PIC16C55A-20I/P |
|---|---|---|---|---|---|
| Package | 28-pin PDIP (DIP-28) | 28-pin PDIP (DIP-28) - same | 28-pin PDIP (DIP-28) - same | 28-pin PDIP (DIP-28) - same | 28-pin PDIP (DIP-28) - same |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Program Memory Type | OTP (768 B / 512 x 12-bit) | OTP (768 B) - same | OTP (768 B) - same | Flash (768 B) - reprogrammable | OTP (768 B) |
| Maximum Clock Frequency | 40 MHz (LP oscillator) | 40 MHz (HS oscillator) | 10 MHz | 20 MHz | 20 MHz |
| Data RAM | 24 B | 24 B | 24 B | 25 B | 24 B |
| Number of I/O Pins | 20 | 20 | 20 | 20 | 20 |
| Watchdog Timer | Yes (on-chip RC osc) | Yes | Yes | Yes | Yes |
| Memory Type (Reprogrammable?) | No (OTP) | No (OTP) | No (OTP) | Yes (Flash, 1000+ cycles) | No (OTP) |
| Lifecycle Status | Obsolete | Obsolete | Obsolete | Active | Obsolete |
Principaux différenciateurs
- Active lifecycle vs obsolete PIC16C5X OTP family (vs PIC16C55-LP/P (itself))
- Reprogrammable flash memory vs OTP (vs PIC16C55-LP/P)
- Same 28-pin PDIP footprint across all PIC16C5X family members (vs PIC16C55-HS/P and PIC16C55-10/P)
Notes de conception
The PIC16C55-LP/P is optimized for low-power operation; the LP oscillator driver supports crystal frequencies from DC to ~200 kHz, drawing minimal quiescent current. Estimated: at 32 kHz LP crystal with all peripherals disabled, the part draws < 15 uA from VDD (per typical PIC16C5X family characteristics). For battery-powered designs, ensure MCLR is tied to VDD via 10 kohm and the watchdog timer is enabled with a long prescaler to maximize sleep-mode recovery. When upgrading to PIC16F54-I/P, the sleep current is typically < 100 nA.
Place the LP-mode crystal or ceramic resonator within 0.25 inch (6 mm) of the OSC1/OSC2 pins to minimize parasitic capacitance. For RC-oscillator mode, place the timing resistor and capacitor close to OSC1 with the capacitor return trace short and direct to the VSS pin. Add a 0.1 uF decoupling capacitor between VDD (pin 27 or 28) and VSS (pin 14) within 0.1 inch of the IC. A bulk 10 uF electrolytic cap on the VDD rail handles motor/relay switching transients.
Critical pitfall: OTP memory cannot be erased or rewritten. Once programmed, any firmware bug requires physical device replacement, so production-volume PCBs must use sockets or buy-and-rework flow. Another pitfall: the LP oscillator suffix is unsuitable for designs above ~200 kHz clock - using a high-frequency crystal with LP driver fails startup. Always verify the suffix matches your oscillator frequency: LP (low-power, DC-200 kHz), XT (200 kHz-4 MHz), HS (4-40 MHz). Migration tip: PIC16F54-I/P accepts the same crystal frequencies with broader driver support.
Informations de conformité
Original PIC16C55-LP/P is not lead-free / not RoHS compliant (pre-RoHS OTP design). For RoHS-compliant drop-in replacements in the same footprint, choose PIC16F54-I/P. PIC16C55A variants may have RoHS-compliant lead-free options; verify per-lot before ordering.
