DS28EC20P+ - 20Kb 1-Wire EEPROM | Analog Devices | TSOC-6
N.º de pieza: DS28EC20P+ ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $2.29 | $2,29 |
| 10 | $2.18 | $21,80 |
| 100 | $1.95 | $195,00 |
| 500 | $1.72 | $860,00 |
| 1.000 | $1.55 | $1.550,00 |
| 3.000 | $1.34 | $4.020,00 |
DS28EC20P+ Descripción general
A 1-Wire EEPROM is a type of non-volatile serial memory IC that combines data storage and communication over a single conductor using a vendor-specific signaling protocol, falling within the EEPROM memory hierarchy and broader memory product classification. Memories fall within the semiconductor IC hierarchy, which is part of the discrete and integrated semiconductor electronics stack. The 1-Wire interface is widely used in identification, calibration, accessory-authentication, and board-tagging applications because it minimizes wiring and allows multiple devices to share one bus.
Key features of the DS28EC20P+ include a 32-byte scratchpad that verifies data before committing to EEPROM, page write capability of up to 32 bytes per write cycle, a unique 64-bit ROM ID for multi-drop bus addressing, an Overdrive mode that raises the bus speed up to 80 MHz equivalent for faster reads, and ESD protection rated per JEDEC HBM on the IO pin. The device derives its operating current parasitically from the 1-Wire line during communication, with the EEPROM page write current supplied from an external reservoir capacitor.
The DS28EC20 architecture uses an addressable-cell decoder with a precision charge pump to program the floating-gate EEPROM cells, ensuring 200K write-cycle endurance and greater than 40-year data retention. Its robust ROM-SHA test structure enables 64-bit unique serialization across billions of devices, and the Overdrive Skip ROM command provides backward compatibility with standard-speed 1-Wire hosts when used on a single-drop bus.
Typical applications include printed circuit board identification and traceability, sensor calibration data storage, medical device accessory authentication, industrial control module tagging, and consumable authentication in printers or analyzers. The device is designed for new designs per the manufacturer product page and is well-suited for both factory-floor automation and field-deployed equipment.
When designing with this part, observe the 1-Wire timing requirements published in the device datasheet, choose a properly sized reservoir capacitor for EEPROM write currents, and consider ESD layout practices on the exposed single data line. The TSOC-6 package supports standard surface-mount reflow while keeping the wire-bond loop compact for reliable 1-Wire signaling.
This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, and is intended as an engineering decision aid for sourcing and second-source planning.
Alternativas directas para DS28EC20P+ — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con DS28EC20P+ (mismo factor de forma y huella) — difiere en Data Retention, Interface, Memory Organization, Memory Type, Mounting Type.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
DS28EC20P+T
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
DS28EC20+
✅ Sustitución directa✓ En stock
$2.05 / unidad
Ver hoja de datos →DS28E07P+
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
DS28EC20P+ Especificaciones
| Tipo de memoria | EEPROM, 1-Wire serial |
| Tamaño de memoria | 20 Kbit (20480 bit) |
| Memory Organization | 80 pages of 256 bits + 1 control page |
| Scratchpad Size | 32 bytes |
| Interfaz | 1-Wire (single contact data + ground) |
| Standard 1-Wire Speed | Up to 15.4 kbps (standard mode) |
| Overdrive Speed | Up to 125 kbps (overdrive mode) |
| Unique ROM ID | 64-bit factory-lasered |
| Write Endurance | 200,000 write cycles per page (typical) |
| Data Retention | Greater than 40 years |
| Supply | Parasitic from 1-Wire line + reservoir capacitor |
| Encapsulado | 6-pin TSOC (3.76 mm body width) |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (per Maxim/ADI product page) |
| ESD Protection | JEDEC HBM on IO pin (per datasheet) |
Configuración de pines de DS28EC20P+
| Pin 1 | GND — Ground return for 1-Wire interface |
| Pin 2 | IO — 1-Wire data line (bidirectional, parasitic supply) |
| Pin 3 | NC — Not connected (per datasheet mechanical drawing) |
| Pin 4 | NC — Not connected (per datasheet mechanical drawing) |
| Pin 5 | NC — Not connected (per datasheet mechanical drawing) |
| Pin 6 | NC — Not connected (per datasheet mechanical drawing) |
Aplicaciones típicas
DS28EC20P+ es adecuado para 6 aplicacións: PCB Serial Number and Asset Tracking, Sensor Calibration Data Storage, Medical Device Accessory Authentication, Industrial Module Identification, Printer and Analyzer Consumable Tracking, Accessory Authentication for Audio/Video Equipment.
PCB Serial Number and Asset Tracking
The DS28EC20P+ stores board-level serial numbers, MAC addresses, and manufacturing data on each PCB using its 80-page x 256-bit EEPROM and 64-bit unique ROM ID. Because the 1-Wire interface only needs one data line plus ground, the chip can be placed anywhere on the board and read through a single test pad, reducing fixture wiring and test time.
Recomendado
Sensor Calibration Data Storage
Each sensor module can store factory calibration coefficients in 20 Kbit of EEPROM using the DS28EC20P+, eliminating manual trim pots and reducing assembly cost. The 200K write endurance and 40-year retention guarantee calibration data survives field operation, while the 32-byte scratchpad allows verified writes over long bus cables without data loss.
Recomendado
Medical Device Accessory Authentication
Hospitals and labs can use the DS28EC20P+ as a low-cost identifier on disposable cartridges, tubing sets, or sensor patches by writing lot and expiry data to its 20 Kbit EEPROM. The 64-bit unique ROM ID prevents counterfeiting, and the 1-Wire single-contact interface allows the host instrument to authenticate accessories through one electrical contact on the consumable.
Recomendado
Industrial Module Identification
PLC I/O modules, motor drives, and field instruments can carry a DS28EC20P+ to store module type, firmware revision, and serial number readable over a single test pin on the production line. The wide -40 C to +85 C operating range and JEDEC HBM ESD protection make the device tolerant of factory and industrial EMI/ESD environments, while the 1-Wire protocol allows bus sharing with other 1-Wire sensors.
Recomendado
Printer and Analyzer Consumable Tracking
Ink cartridges, toner bottles, and analyzer reagent packs can embed a DS28EC20P+ to record fill state, expiration, and usage telemetry. The host can detect a fresh cartridge via the unique ROM ID and update remaining-capacity counters across multiple 256-bit pages, while the 200K endurance survives the lifetime writes of high-volume consumables.
Recomendado
Accessory Authentication for Audio/Video Equipment
Headphones, microphones, and docking accessories can integrate a DS28EC20P+ to store model ID, firmware version, and vendor credentials that the host A/V system validates on power-up. The single-wire 1-Wire interface simplifies accessory wiring and the 20 Kbit capacity holds multi-language brand strings plus calibration profiles, while the unique ROM ID prevents third-party clones.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para DS28EC20P+ — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | DS28EC20P+T | DS28EC20+ | DS28E07P+ |
|---|---|---|---|---|
| Brand | Analog Devices (Maxim Integrated) | Analog Devices | Analog Devices | Analog Devices |
| Package | 6-pin TSOC (3.76 mm) | 6-pin TSOC (3.76 mm) - same | 6-pin TSOC (3.76 mm) - same | 6-pin TSOC - same family footprint |
| Memory Size | 20 Kbit (80 x 256-bit) | 20 Kbit (80 x 256-bit) - same | 20 Kbit (80 x 256-bit) - same | 1 Kbit (4 x 256-bit) - lower density |
| Interface | 1-Wire (15.4 kbps std / 125 kbps OD) | 1-Wire - same | 1-Wire - same | 1-Wire - same protocol |
| Scratchpad Size | 32 bytes | 32 bytes - same | 32 bytes - same | 8 bytes (smaller scratchpad) |
| Unique ROM ID | 64-bit | 64-bit - same | 64-bit - same | 64-bit - same |
| Write Endurance | 200,000 cycles/page (typical) | 200,000 cycles/page - same | 200,000 cycles/page - same | 200,000 cycles/page - same |
| Data Retention | >40 years | >40 years - same | >40 years - same | >40 years - same |
Diferenciadores clave
- Highest-density 1-Wire EEPROM in the TSOC-6 footprint from the original vendor (frente a DS28E07P+)
- True drop-in same-package and same-die alternatives from same brand (frente a DS28EC20P+T and DS28EC20+)
- Lower-density but pin-compatible 1-Wire EEPROM option from same brand (frente a DS28E07P+)
Notas de diseño
Estimated: The DS28EC20P+ is parasitically powered from the 1-Wire line during read operations, but EEPROM page writes require a reservoir capacitor to deliver the programming current. Place a 100 nF to 470 nF low-ESR ceramic capacitor from IO to GND as close to the package pin as possible, and avoid long traces that add inductance on the IO line, which would otherwise cause the IO voltage to droop during write cycles and trigger write-verify failures.
Use a 4.7 kΩ pull-up resistor on the 1-Wire IO line, with the resistor placed near the host side and a strong driver recommended for Overdrive mode. Keep cable stubs short and avoid stubs longer than one-tenth of the signal rise time, since the bidirectional nature of 1-Wire is sensitive to reflections. The host must satisfy the 1-Wire timing windows (slot timing, presence pulse) within the tolerances specified in the device datasheet.
Lay out the TSOC-6 land pattern to match the JEDEC TSOC mechanical drawing with a single large GND copper pour for thermal and electrical return. Keep the IO trace short, avoid running the IO trace parallel to switching nodes or RF traces, and add a guard ground via fence where the IO pad transitions to a test header. Stencil aperture should be tuned to avoid tombstoning on the small TSOC-6 pads during reflow.
Common pitfalls include reading the ROM ID without an explicit Reset/Presence sequence, neglecting to verify scratchpad contents before the Copy-to-EEPROM command, and under-sizing the reservoir capacitor which causes incomplete page writes. Also note that 1-Wire devices must be addressed with their unique 64-bit ROM ID on multi-drop buses, and the Skip ROM command works only on single-drop buses. Always perform a Read-ROM or Match-ROM cycle before scratchpad operations on a populated bus.
Información de cumplimiento
RoHS and REACH compliance per Maxim/ADI product page. Not AEC-Q100 qualified - DS28EC20P+ targets industrial and consumer applications. Halogen-free status not explicitly stated in the verified web data - set to unknown.
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