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Microchip Technology AT25080BN-SH-B
- Part No.:
- AT25080BN-SH-B
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25080BN-SH-B.pdf
- Description:
- IC EEPROM 8KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,624
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Product details
Overview
AT25080BN-SH-B from Microchip Technology (formerly Atmel) is an 8-Kbit SPI serial EEPROM organized as 1024 × 8-bit memory, operating from 1.8 V to 5.5 V, supporting 20 MHz clock rate at 5 V, featuring 32-byte page write and hardware/software write protection via WP pin and status register. It serves as nonvolatile configuration storage in industrial microcontroller systems requiring low-voltage operation and long data retention.
For engineers reviewing the AT25080BN-SH-B datasheet, AT25080BN-SH-B pinout, AT25080BN-SH-B application, or AT25080BN-SH-B equivalent, this page delivers verified electrical specs, JEDEC SOIC-8 package mapping, SPI Mode 0/3 interface behavior, block protection logic, and real-world use cases for embedded firmware parameter storage, sensor calibration data logging, and secure boot configuration.
Technical Context
The AT25080BN-SH-B implements a synchronous slave SPI interface with separate SI/SO pins, fixed MSB-first transmission, and CS-driven command framing. Its internal architecture includes a nonvolatile status register with BP0/BP1/WPEN bits controlling 1/4, 1/2, or full array write protection and hardware write enable/disable via WP pin state.
All operations-READ, WRITE, WREN, WRDI, RDSR, WRSR-are initiated by op-code reception after CS assertion, with self-timed internal write cycles (≤5 ms) and automatic address incrementing during page writes. HOLD pin suspends ongoing transfers without resetting sequence state, enabling multi-device arbitration on shared buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 8192 bits (1024 words × 8 bits), sufficient for storing bootloader flags, device IDs, or calibration coefficients in compact MCU designs. |
| Supply Voltage Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V logic families without level shifting. |
| Max Clock Frequency | 20 MHz at VCC = 5 V - enables fast configuration reads during system boot (<1 ms for full memory dump). |
| Page Write Size | 32 bytes - minimizes write latency per transaction and reduces wear on targeted memory regions. |
| Endurance & Retention | 1 million write cycles / 100-year data retention - validated for lifetime logging in industrial controllers with infrequent updates. |
| Write Protection | Hardware (WP pin) + software (status register BP0/BP1) - allows selective lock of top quarter (0300–03FFh) or entire array (0000–03FFh) against accidental overwrite. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade deployment in programmable logic controllers and motor drives. |
Pinout & Package
AT25080BN-SH-B is packaged in an 8-lead JEDEC SOIC (package code 8S1), 0.150" wide body, NiPdAu lead finish, RoHS-compliant and halogen-free.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be low to accept op-codes and data; high-Z SO when deasserted. |
| SCK | Serial Clock | Master-generated clock input; defines timing for SI sampling and SO output; supports Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1). |
| SI | Serial Data Input | Input-only data line for op-codes, addresses, and write data; ignored during HOLD or when CS is high. |
| SO | Serial Data Output | Output-only data line for read data and status register contents; tri-stated when CS is high or during HOLD. |
| GND | Ground Reference | Primary return path for VCC and all I/O signals; requires low-impedance PCB connection to minimize noise coupling. |
| VCC | Power Supply | Single supply input (1.8–5.5 V); decoupling capacitor (0.1 µF) recommended within 10 mm of pin. |
| WP | Write Protect | Hardware lock for status register writes when WPEN=1; tied low to prevent field reprogramming of protection settings. |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting internal address counter; used for bus arbitration in multi-slave systems. |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Compatibility | Interoperates with legacy 68HC11 and modern ARM Cortex-M SPI peripherals without mode translation logic. |
| Self-timed Write Cycle | No external timing control needed; internal erase/write completes in ≤5 ms, freeing MCU resources during programming. |
| Block Write Protection | Four configurable protection levels (none, 1/4, 1/2, full) implemented via nonvolatile BP0/BP1 bits - prevents corruption of critical firmware parameters. |
| Low Standby Current | ≤0.1 µA at 1.8 V - enables battery-backed operation in energy-sensitive IoT edge nodes. |
| Industrial Temp Range | −40°C to +85°C operation - ensures reliable boot-time configuration access in factory automation environments. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data Logging |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning constants, and alarm thresholds in programmable logic controllers deployed in manufacturing lines. IC Role / Device Role / Timing Role: Nonvolatile configuration EEPROM interfaced directly to PLC's main MCU via SPI, accessed during power-up and runtime parameter updates. Use Value: Enables field-upgradable machine logic without firmware reflashing; 100-year retention guarantees parameter integrity across equipment lifecycles. | Use Scenario: Recording sensor offset/gain coefficients and user-defined therapy limits in portable infusion pumps and diagnostic monitors. IC Role / Device Role / Timing Role: Dedicated calibration memory co-located with analog front-end, written once during factory calibration and read at startup. Use Value: Eliminates need for external calibration jigs; 1M endurance supports recalibration during service intervals without memory wear-out risk. |
| Smart Energy Meter Firmware Flags | Automotive Body Control Module Settings |
Use Scenario: Holding tariff schedules, meter ID, tamper-detection flags, and communication protocol versions in ANSI C12.19-compliant smart meters. IC Role / Device Role / Timing Role: Secure boot-time configuration store accessed by meter's host processor before initializing RF/PLC modems. Use Value: WP pin hardwired to prevent unauthorized firmware flag modification; block protection isolates critical security bits from application updates. | Use Scenario: Storing seat position presets, mirror angles, and lighting profiles in automotive BCMs for personalized driver settings. IC Role / Device Role / Timing Role: SPI-connected nonvolatile memory mapped into BCM microcontroller's peripheral space for fast read/write during vehicle power-on/off sequences. Use Value: Low 1.8 V operation aligns with BCM's 3.3 V LDO rail; −40°C to +85°C rating ensures reliability in under-hood temperature cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95080-DRMN6TP/K | STMicroelectronics 8-Kbit SPI EEPROM; identical 8-lead SOIC package, 1.8–5.5 V range, but rated for 5 MHz max clock (vs. 20 MHz for AT25080BN-SH-B). | Lower speed limits throughput in high-bandwidth calibration logging; suitable where <100 kB/s write is acceptable. | Select when cost sensitivity outweighs speed requirement and ST's qualification documentation is preferred. |
| BR24G08NUX-10 | Rohm 8-Kbit SPI EEPROM; same voltage range and SOIC-8 footprint, but uses different status register bit layout and lacks HOLD pin functionality. | No HOLD support restricts use in multi-master SPI buses; requires software-level arbitration instead of hardware suspend. | Choose for simple single-master systems where HOLD is unused and Rohm's AEC-Q200 automotive qualification adds value. |
Compared with M95080-DRMN6TP/K and BR24G08NUX-10, the AT25080BN-SH-B provides higher-speed operation (20 MHz), integrated HOLD for bus arbitration, and flexible block protection granularity - making it optimal for industrial controllers requiring deterministic configuration access and robust field update security.
Availability
AT25080BN-SH-B is available at Aetrix Electronics and suitable for industrial PLC configuration storage, medical device calibration data logging, and smart energy meter firmware flags requiring stable component supply across extended production lifecycles.
Supply support for AT25080BN-SH-B includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microchip Technology acquired Atmel in 2016 and continues to manufacture and support its serial EEPROM portfolio with full backward compatibility and long-term supply commitment.
The AT25080BN-SH-B belongs to Microchip's legacy AT25xxx SPI EEPROM family, designed specifically for low-power, industrial-grade nonvolatile storage in resource-constrained microcontroller systems requiring guaranteed data integrity over decades.
FAQ
What is the maximum clock frequency supported by the AT25080BN-SH-B?
The AT25080BN-SH-B supports up to 20 MHz SCK frequency at VCC = 5.0 V. At lower voltages (1.8–3.6 V), the maximum clock rate is reduced to 10 MHz, and at 2.7–5.5 V it is 10 MHz. These values are specified in Table 0-4 of the datasheet and reflect actual AC timing limits-not theoretical bandwidth. The AT25080BN-SH-B must be operated within these voltage-dependent frequency bounds to ensure reliable read/write operation.
Does the AT25080BN-SH-B require a separate erase cycle before writing?
No, the AT25080BN-SH-B does not require a separate erase cycle. All write operations-including byte and page writes-are self-timed and internally manage erase-before-write sequencing. After issuing a WRITE instruction and asserting CS high, the device automatically erases the target page (if needed) and programs new data within ≤5 ms. This eliminates software overhead and simplifies firmware implementation compared to parallel EEPROMs.
How is write protection implemented on the AT25080BN-SH-B?
Write protection on the AT25080BN-SH-B is implemented through dual mechanisms: hardware via the WP pin (when WPEN bit = 1) and software via BP0/BP1 bits in the status register. When WP is low and WPEN = 1, writes to the status register and protected memory blocks are disabled. BP0/BP1 define four protection levels (none, 1/4, 1/2, or full array), with protected addresses ranging from 0000h–03FFh for the AT25080BN-SH-B. The AT25080BN-SH-B retains these settings across power cycles.
What package type is used for the AT25080BN-SH-B?
The AT25080BN-SH-B uses an 8-lead JEDEC SOIC package (package code 8S1), 0.150" wide body, with NiPdAu lead finish. This is confirmed in the "AT25080B Ordering Information" table (page 14) and matches the pin configuration diagram for 8-lead SOIC on page 1. The package is RoHS-compliant, halogen-free, and rated for industrial temperature operation (−40°C to +85°C).
Can the AT25080BN-SH-B operate from a 1.8 V supply?
Yes, the AT25080BN-SH-B is fully specified for 1.8 V operation across its entire functional range: it supports SPI communication, read/write operations, and status register access at VCC = 1.8 V to 5.5 V. DC characteristics including standby current (ISB1 < 0.1 µA), input thresholds (VIL/VIL), and output drive (VOL2/VOH2) are explicitly characterized at 1.8 V in Table 0-3. This makes the AT25080BN-SH-B suitable for ultra-low-power applications powered by single-cell Li-ion or coin-cell batteries.
AT25080BN-SH-B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 8Kbit
- Memory Organization:
- 1K x 8
- Memory Interface:
- SPI
- Clock Frequency:
- 20 MHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
AT25080BN-SH-B FAQ
1.How can I place an order for AT25080BN-SH-B through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25080BN-SH-B on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT25080BN-SH-B reliable?
The price and inventory of AT25080BN-SH-B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25080BN-SH-B is usually 5 days.
3.What payment methods are accepted for AT25080BN-SH-B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25080BN-SH-B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25080BN-SH-B?
AT25080BN-SH-B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25080BN-SH-B order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT25080BN-SH-B?
For technical support, including AT25080BN-SH-B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25080BN-SH-B requirements.
6.How does Aetrix verify that AT25080BN-SH-B is sourced from the original manufacturer or authorized distributors?
All AT25080BN-SH-B products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT25080BN-SH-B meets industry standards.
7.What is the process for return or replacement of AT25080BN-SH-B?
All AT25080BN-SH-B units undergo pre-shipment inspection (PSI). If there is an issue with AT25080BN-SH-B, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT25080BN-SH-B part is unused and in its original packaging.
Return procedure for AT25080BN-SH-B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25080BN-SH-B Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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