AT25256AN-10SU-2.7 - 256Kbit SPI EEPROM | Microchip
Référence : AT25256AN-10SU-2.7 ✗ Fin de vie| Qté | Prix unitaire | Total |
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| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1 000 | $0 | $0,00 |
AT25256AN-10SU-2.7 Présentation
A serial EEPROM is a nonvolatile memory device that retains programmed data when power is removed. It belongs to the memory hierarchy below flash and RAM, providing persistent configuration, calibration, serial-number, and small data-storage functions. The AT25256AN-10SU-2.7 uses the SPI bus rather than a parallel address and data interface, reducing wiring requirements in space-constrained designs.
Key features include a 256-Kbit capacity organized as 32K × 8, operation from 2.7 V to 5.5 V, a maximum 20 MHz clock rate at 5 V, and support for SPI modes identified in the retrieved data as modes 0 and 3. The part also provides 64-byte page-mode operation, which can improve throughput when sequential data is written.
The device is identified as an automotive-oriented, industrial-temperature EEPROM in the retrieved distributor and distributor-hosted product information. Its operating temperature range is reported as −40°C to +85°C, making it suitable for industrial and automotive applications where temperature tolerance and nonvolatile storage are required.
Typical uses include automotive control modules, industrial automation equipment, consumer electronics, sensor calibration data, product configuration memory, and small firmware or serial-number storage. The 8-SOIC package is appropriate for conventional PCB assembly, while the serial interface simplifies connection to a microcontroller.
When designing around the AT25256AN-10SU-2.7, verify the host SPI mode, clock rate, supply voltage, write timing, and page-write behavior against the manufacturer datasheet. The available verified data confirms the core electrical and functional identifiers, but it does not provide every detailed timing, endurance, or absolute-maximum parameter; those values must be confirmed before production release.
This page combines verified distributor identifiers, technical specifications, application context, and strict same-package replacement guidance. It distinguishes confirmed source data from engineering assumptions so engineers can evaluate the device efficiently while preserving traceability to the supplied manufacturer and distributor records.
Alternatives de remplacement direct pour AT25256AN-10SU-2.7 — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
AT25256AN-10SI-2.7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AT25256AN-10SU-2.7
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →AT25256AN-10SU-2.7
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →AT25256AN-10SI-2.7
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
AT25256AN-10SU-2.7
✅ Remplacement direct✓ En stock
Contactez-nous pour le prix
Voir la fiche technique →AT25256AN-10SU-2.7 Valeurs maximales et caractéristiques électriques
| Type de mémoire | Serial EEPROM |
| Memory Capacity | 256 Kbit |
| Memory Organization | 32K × 8 |
| Supply Voltage Range | 2.7 V to 5.5 V |
| Fréquence d'horloge maximale | 20 MHz at 5 V |
| SPI Mode Compatibility | SPI modes 0 and 3 |
| Page Write Size | 64 bytes |
| Plage de température de fonctionnement | −40°C to +85°C |
| Boîtier | 8-SOIC |
| Type de montage | Surface Mount |
| Interface | SPI |
| Nonvolatile Storage | EEPROM |
| Automotive Qualification | Automotive-oriented part identifier; qualification details not supplied |
| Manufacturer | Microchip Technology |
Guide de configuration des broches du AT25256AN-10SU-2.7 8-soic
Configuration des broches du AT25256AN-10SU-2.7 (boîtier 8-soic). Ce circuit intégré numérique comprend des GPIO, des interfaces de communication (UART, SPI, I2C) et des broches d'alimentation. Consultez la fiche technique du fabricant pour les fonctions alternatives des broches et les options de configuration. Indispensable pour la conception de systèmes embarqués et la conception de circuits imprimés.
Aucune donnée de brochage détaillée disponible pour AT25256AN-10SU-2.7.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
AT25256AN-10SU-2.7 convient pour 6 applications: Automotive Control Module Storage, Industrial Automation Configuration Memory, Sensor Calibration Data, Consumer Electronics Settings Storage, Firmware and Boot-Parameter Storage, Remote Sensor Node Configuration.
Automotive Control Module Storage
The AT25256AN-10SU-2.7 fits automotive-oriented control modules that need persistent calibration, configuration, diagnostic, or serial-number data. Its 256-Kbit capacity provides 32K × 8 storage, while the verified 2.7 V to 5.5 V operating range supports embedded systems commonly supplied by low-voltage rails. The reported −40°C to +85°C temperature range is useful across industrial and automotive environments, but production qualification and absolute maximum limits must be confirmed from the manufacturer datasheet.
Recommandé
Industrial Automation Configuration Memory
Use the AT25256AN-10SU-2.7 in industrial automation equipment for device settings, network identifiers, calibration coefficients, and operating profiles that must remain available after power cycling. Its 256-Kbit nonvolatile capacity is larger than a minimal identity store while remaining compact in an 8-SOIC package. The SPI interface limits pin count, and the 64-byte page mode can reduce command overhead when sequential records are written.
Recommandé
Sensor Calibration Data
The EEPROM is appropriate for storing calibration tables and sensor correction data in measurement systems. A 32K × 8 organization can hold structured coefficients or lookup data without occupying a parallel data bus. Because the interface is SPI, the device can share a small pin budget with a microcontroller or sensor hub. Verify write timing and endurance from the manufacturer datasheet before selecting it for frequently updated calibration cycles.
Recommandé
Consumer Electronics Settings Storage
AT25256AN-10SU-2.7 can retain product settings, serial numbers, and user-adjustable parameters in consumer devices while avoiding the pin count of a parallel EEPROM. The 2.7 V minimum supply supports compact embedded platforms, and the 8-SOIC package is widely compatible with conventional surface-mount assembly. The verified data does not provide full timing, retention, or endurance limits, so those parameters should be reviewed before high-volume consumer deployment.
Recommandé
Firmware and Boot-Parameter Storage
The 256-Kbit capacity can store boot parameters, firmware metadata, feature flags, and recovery information beside a host MCU. SPI allows the memory to remain connected through a compact serial bus, while the 64-byte page-write feature is useful for sequential parameter updates. Designers should protect critical records with a valid-data or checksum strategy and confirm the device’s supported write and endurance behavior from the official datasheet.
Recommandé
Remote Sensor Node Configuration
For remote sensor nodes, the AT25256AN-10SU-2.7 can retain device identity, radio configuration, calibration values, and diagnostic counters in a low-power embedded system. The serial interface reduces wiring overhead, while nonvolatile storage preserves data across battery removal or reset. The 2.7 V lower operating limit can support low-voltage designs, but total current consumption, sleep behavior, and write endurance are not provided in the verified data and must be checked separately.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour AT25256AN-10SU-2.7 — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | AT25256AN-10SI-2.7 | AT25256AN-10SU-2.7 | AT25256AN-10SI-2.7 | AT25256AN-10SU-2.7 | AT25256AN-10SU-2.7 |
|---|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC in supplied supplier listing | 8-SOIC | 8-SOIC in supplied supplier listing | 8-SOIC | 8-SOIC |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
Principaux différenciateurs
- Compact serial-interface storage (vs AT25256AN-10SI-2.7)
- Higher verified memory organization (vs AT25010AN-10SU-2.7)
- Defined voltage and clock envelope (vs AT25256AN-10SI-2.7)
- Sequential-write optimization (vs AT25256AN-10SI-2.7)
Notes de conception
Route the SPI signals as short, controlled traces from the host MCU to the EEPROM. Keep the serial clock, data input, data output, chip-select, and write-enable connections away from noisy switching nodes and high-current return paths. Place the device close to the controller and follow the manufacturer’s recommended decoupling arrangement; the supplied verified data confirms the 8-SOIC format but does not provide a PCB reference layout.
Do not assume that a part sharing the AT25256AN family name is automatically a drop-in substitute. Confirm the complete ordering code, package drawing, pin names, SPI mode, write timing, and electrical limits in the manufacturer documentation. In particular, AT25010AN-10SU-2.7 is a different capacity family and should not be used as a replacement without a verified 256-Kbit, pin-compatible engineering decision.
The verified operating range is 2.7 V to 5.5 V, and the 20 MHz clock specification is explicitly identified at 5 V. Design the host and PCB supply so the EEPROM remains within the confirmed voltage range during startup, reset, and write cycles. Add local supply bypassing according to the manufacturer guidance and avoid long supply traces that increase transient sensitivity.
Use the 64-byte page-write feature only when the host protocol handles page boundaries and write-completion polling correctly. A write operation must not be assumed complete merely because the command has been transmitted. Validate busy/status behavior, data retention, and endurance from the official datasheet before updating calibration or configuration records in the field.
Informations de conformité
The supplied data describes the part as automotive-oriented and reports an operating temperature range of −40°C to +85°C, but it does not provide formal RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declarations.
