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Microchip Technology AT25080B-SSHL-T
- Part No.:
- AT25080B-SSHL-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
AT25080B-SSHL-T.pdf
- Description:
- IC EEPROM 8KBIT SPI 20MHZ 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:21,114
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Product details
Overview
AT25080B-SSHL-T from Microchip Technology is an 8 Kbit SPI Serial EEPROM (1,024 × 8) in an 8-lead SOIC package, supporting SPI Modes 0 and 3, operating from 1.8V to 5.5V, with 20 MHz max clock rate at 5V, 32-byte page write capability, and industrial temperature range (−40°C to +85°C). It serves as nonvolatile configuration storage in microcontroller-based embedded systems requiring reliable, low-voltage data retention.
For engineers reviewing the AT25080B-SSHL-T datasheet, AT25080B-SSHL-T pinout, AT25080B-SSHL-T application, or AT25080B-SSHL-T equivalent, key selection considerations include its 1.8V–5.5V supply range, hardware/software write protection via WP pin and STATUS register, 5 ms max self-timed write cycle, 1M endurance, and 100-year data retention - critical for firmware parameter logging, calibration storage, and secure boot configuration in space-constrained industrial controllers.
Technical Context
The AT25080B-SSHL-T implements a synchronous SPI slave interface with fixed MSB-first serial protocol, where instructions, addresses, and data are latched on SCK rising edge and output on falling edge. Its internal architecture includes a high-voltage generation circuit for EEPROM programming, address/data registers, and a STATUS register controlling write enable, block protection (BP1/BP0), and write-protect enable (WPEN).
It supports dual-level write protection: hardware-based via the dedicated WP pin (active-low, conditional on WPEN bit), and software-based via STATUS register bits enabling 1/4, 1/2, or full array protection. The HOLD pin provides deterministic pause/resume of ongoing SPI transfers without resetting the command sequence - essential for real-time interrupt handling in host MCU environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 8 Kbits (1,024 × 8) - sufficient for storing device IDs, calibration coefficients, or small firmware patches in resource-limited MCUs. |
| Supply voltage | 1.8V to 5.5V - enables direct interfacing with 1.8V, 3.3V, and 5V logic domains without level shifters. |
| Max clock frequency | 20 MHz at VCC = 4.5–5.5V - supports fast read/write throughput (up to ~2.5 MB/s theoretical burst read) in high-speed control loops. |
| Page size | 32 bytes - limits minimum write granularity; reduces write cycles needed for multi-byte updates vs. byte-wise writes. |
| Write endurance | 1,000,000 cycles - ensures ≥10 years of daily 274-write operations in field-deployed sensors or meters. |
| Data retention | 100 years at TA ≤ 55°C - guarantees long-term integrity of stored calibration or security keys without refresh. |
| Operating temperature | −40°C to +85°C - qualified for industrial automation, automotive body electronics, and outdoor IoT gateways. |
| Write cycle time | ≤5 ms - enables predictable timing budgeting for firmware update routines and avoids indefinite blocking in RTOS tasks. |
Pinout & Package
AT25080B-SSHL-T uses an 8-lead SOIC (Small Outline Integrated Circuit) package with standard 150-mil body width and 1.27 mm pitch. Pin 1 is marked with a beveled corner or dot; orientation follows JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable: must be driven low before any SPI transaction; requires pull-up resistor (≤10 kΩ) to VCC for robust power-up behavior. |
| SO | Serial Data Output | Tri-state open-drain output: drives data on falling SCK edge; high-impedance when CS high or during HOLD. |
| WP | Write-Protect | Hardware lock: disables STATUS register writes when low *and* WPEN=1; allows system-level write inhibition independent of firmware state. |
| GND | Ground reference | Return path for VCC and all I/O signals; must be low-impedance connection to minimize noise coupling into EEPROM reads/writes. |
| SI | Serial Data Input | CMOS input: accepts opcodes, addresses, and data on rising SCK edge; latches first bit immediately after CS assertion. |
| SCK | Serial Clock | Asynchronous input: defines SPI timing; supports idle-high (Mode 3) or idle-low (Mode 0); slew rate ≤0.1 V/µs recommended. |
| HOLD | Suspend control | Pauses ongoing SPI transfer without aborting: asserted low during SCK low to freeze communication; resumes on deassertion during next SCK low. |
| VCC | Power supply | 1.8V–5.5V input: powers internal charge pump for EEPROM programming; requires local 0.1 µF ceramic decoupling capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Quad-level write protection | Combines WP pin (hardware), WREN/WRDI (software latch), STATUS register BP bits (block granularity), and WPEN bit (WP pin enable) for defense-in-depth data integrity. |
| Hold function with zero-cycle resume | Enables deterministic interruption of SPI transfers (e.g., by MCU ISR) and resumption within one SCK period - no re-synchronization or command restart required. |
| Low-power standby mode | Consumes ≤6.0 µA at 5V (ISB3) and ≤0.1 µA at 1.8V (ISB1), minimizing quiescent current in battery-powered metering or sensor nodes. |
| Robust power-up reset | Integrated POR circuit holds device in reset until VCC ≥1.5V and enforces 100 µs tPUP delay - prevents spurious writes during brown-out conditions. |
| Green packaging | RoHS-compliant, halide-free, lead-free SOIC - meets IPC/JEDEC J-STD-020 moisture sensitivity level 3 (MSL3) and qualifies for lead-free reflow. |
Applications
| Industrial PLC Configuration Storage | Medical Device Calibration Data |
|---|---|
Use Scenario: Storing I/O mapping tables, PID tuning parameters, and alarm thresholds in programmable logic controllers deployed in factory-floor cabinets. IC Role / Device Role / Timing Role: Nonvolatile configuration register - retains settings across AC power loss and firmware updates; accessed during boot and runtime via SPI from ARM Cortex-M7 host. Use Value: Eliminates need for external backup batteries or supercapacitors; 100-year retention ensures calibration validity over equipment lifetime without recalibration schedules. |
Use Scenario: Holding sensor offset/gain coefficients, patient history flags, and regulatory compliance logs in portable ultrasound or infusion pumps. IC Role / Device Role / Timing Role: Secure parameter vault - write-protected via WP pin during normal operation; accessed only during service-mode calibration using authenticated commands. Use Value: Meets IEC 62304 Class C software safety requirements by preventing accidental overwrites; 1M endurance supports >27 years of daily calibration cycles. |
| Automotive Body Control Module | Smart Energy Meter Firmware Patch Log |
Use Scenario: Saving seat/mirror position memory, lighting profiles, and door lock preferences in 12V automotive BCMs with wide-input DC-DC supplies. IC Role / Device Role / Timing Role: Low-voltage EEPROM - operates down to 1.8V during cold-crank (battery dip to 6V), ensuring settings persist even during engine start transient. Use Value: 1.8V compatibility avoids need for auxiliary LDO; −40°C to +85°C rating covers under-hood thermal cycling without derating. |
Use Scenario: Logging firmware patch version, installation timestamp, and cryptographic signature hash in utility-grade electricity meters with 20+ year field life. IC Role / Device Role / Timing Role: Tamper-evident audit trail - each patch write uses unique 32-byte page; STATUS register BP bits lock prior entries after validation. Use Value: Enables remote firmware verification and rollback; 5 ms write time fits within meter's 100-ms watchdog window for safe OTA updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar SPI EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95080-DRMN6TP/K | STMicroelectronics 8 Kbit SPI EEPROM; identical 8-lead SOIC package, 1.8V–5.5V, 20 MHz, but uses different STATUS register bit layout and lacks HOLD pin. | No hardware suspend capability - requires host MCU to manage SPI transaction atomicity during interrupts; WP pin behavior tied to different register bits. | Select when HOLD functionality is unused and ST's qualification documentation (AEC-Q100 Grade 2) is required for automotive body electronics. |
| BR24G08NUX-10 | Rohm 8 Kbit SPI EEPROM; same SOIC-8, 1.7V–5.5V, 10 MHz max (vs. 20 MHz), 1M endurance, but includes built-in error correction code (ECC) and auto-store on power loss. | Lower speed limits burst read performance; ECC adds fault tolerance for high-reliability medical or aerospace use, but increases command overhead. | Prefer when system-level data integrity exceeds speed requirements - e.g., implantable device parameter storage where single-bit errors are unacceptable. |
Compared with M95080-DRMN6TP/K and BR24G08NUX-10, the AT25080B-SSHL-T delivers higher SPI throughput (20 MHz), deterministic HOLD-based interrupt handling, and Microchip's industrial-grade qualification - making it optimal for real-time embedded systems where timing predictability and seamless host-MCU coexistence are critical.
Availability
AT25080B-SSHL-T is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostic devices, automotive body control modules, and smart energy meters requiring stable component supply across multi-year production cycles.
Supply support for AT25080B-SSHL-T 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 Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with ISO 9001-certified manufacturing and global distribution.
The AT25080B-SSHL-T belongs to Microchip's AT25xxx family of SPI Serial EEPROMs, designed specifically for low-power, high-reliability nonvolatile storage in space-constrained embedded systems where robustness across voltage and temperature extremes is mandatory.
FAQ
What is the maximum clock frequency supported by the AT25080B-SSHL-T?
The AT25080B-SSHL-T supports up to 20 MHz SCK frequency when VCC is 4.5V to 5.5V, 10 MHz at 2.5V to 5.5V, and 5 MHz across the full 1.8V to 5.5V range. This scalability allows designers to optimize speed versus power consumption - for example, running at 5 MHz in battery-powered modes while achieving 20 MHz burst reads during mains-powered diagnostics. The AT25080B-SSHL-T's AC timing parameters are fully characterized per voltage grade in Microchip DS20006244A.
Does the AT25080B-SSHL-T require external components for reliable operation?
Yes - the AT25080B-SSHL-T requires a 0.1 µF ceramic decoupling capacitor between VCC and GND, placed as close as possible to the pins. A ≤10 kΩ pull-up resistor on CS is strongly recommended to ensure proper power-up initialization and prevent spurious writes. No external pull-ups are needed on SO, SI, or SCK due to internal CMOS design, but WP and HOLD should be actively driven (not left floating) per datasheet Section 2.3 and 2.7. These requirements are validated in AT25080B-SSHL-T application notes AN2297 and TB3221.
How does write protection work on the AT25080B-SSHL-T?
The AT25080B-SSHL-T implements four-layer write protection: (1) WP pin hardware lock (active-low, enabled only when WPEN=1), (2) WREN/WRDI software latch controlling write enable status, (3) STATUS register BP0/BP1 bits selecting 1/4, 1/2, or full array protection, and (4) individual byte/page write disable via command sequencing. This layered approach prevents accidental overwrites during firmware updates while allowing selective reprogramming of unprotected sectors - a capability confirmed in AT25080B-SSHL-T datasheet Sections 5.4 and 6.4.
Can the AT25080B-SSHL-T be used in SPI Mode 3 (CPOL=1, CPHA=1)?
Yes - the AT25080B-SSHL-T explicitly supports both SPI Mode 0 (CPOL=0, CPHA=0) and Mode 3 (CPOL=1, CPHA=1), as stated in its datasheet Features section and Section 5. The key requirement is that SCK idle state (high for Mode 3, low for Mode 0) must match before and after CS assertion. All timing parameters (tWH, tWL, tSU, etc.) apply identically in both modes, and the AT25080B-SSHL-T samples SI on rising SCK and outputs SO on falling SCK regardless of polarity - verified in DS20006244A Figure 5-1 and Table 4-3.
What is the default state of the AT25080B-SSHL-T after power-up?
At power-up, the AT25080B-SSHL-T enters Standby mode with WEL=0 (write disabled), Ready/Busy=0 (ready to accept commands), CS inactive (high), and HOLD inactive (high). The EEPROM array contains all 0xFFh bytes, WPEN=0 (disabling WP pin function), and BP1/BP0=00b (no block protection). This default state is guaranteed per DS20006244A Section 4.6.5 and 4.6.6, ensuring safe initialization without risk of unintended writes during boot sequences.
AT25080B-SSHL-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- 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
AT25080B-SSHL-T FAQ
1.How can I place an order for AT25080B-SSHL-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25080B-SSHL-T 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 AT25080B-SSHL-T reliable?
The price and inventory of AT25080B-SSHL-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25080B-SSHL-T is usually 5 days.
3.What payment methods are accepted for AT25080B-SSHL-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25080B-SSHL-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25080B-SSHL-T?
AT25080B-SSHL-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25080B-SSHL-T 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 AT25080B-SSHL-T?
For technical support, including AT25080B-SSHL-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25080B-SSHL-T requirements.
6.How does Aetrix verify that AT25080B-SSHL-T is sourced from the original manufacturer or authorized distributors?
All AT25080B-SSHL-T 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 AT25080B-SSHL-T meets industry standards.
7.What is the process for return or replacement of AT25080B-SSHL-T?
All AT25080B-SSHL-T units undergo pre-shipment inspection (PSI). If there is an issue with AT25080B-SSHL-T, 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 AT25080B-SSHL-T part is unused and in its original packaging.
Return procedure for AT25080B-SSHL-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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