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Microchip Technology AT25320A-10TI-1.8
- Part No.:
- AT25320A-10TI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25320A-10TI-1.8.pdf
- Description:
- IC EEPROM 32KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,522
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Product details
Overview
AT25320A-10TI-1.8 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 words × 8 bits, operating from 1.8V to 5.5V supply, supporting 20 MHz clock rate at 5V, with 32-byte page write and hardware/software write protection. It serves as nonvolatile configuration storage in automotive body control modules requiring extended temperature operation and low-voltage compatibility.
For engineers reviewing the AT25320A-10TI-1.8 datasheet, AT25320A-10TI-1.8 pinout, AT25320A-10TI-1.8 application, or AT25320A-10TI-1.8 equivalent, key selection criteria include 1.8V–5.5V voltage range, TSSOP-8 package footprint, 100-year data retention, 1 million write cycles, and automotive-grade −40°C to +85°C operation.
Technical Context
The AT25320A-10TI-1.8 implements a synchronous SPI slave interface compliant with Modes 0 and 3, using separate SI/SO lines and CS-controlled selection. Its internal architecture includes an 8-bit instruction register, status register with BP0/BP1 block protection bits, and WPEN bit enabling hardware write protect via the WP pin.
It supports self-timed internal write cycles (≤5 ms), automatic address increment during read, and HOLD pin suspension of serial communication without sequence reset. Block write protection covers 0%, 25%, 50%, or 100% of the 4096-word array, configurable via WRSR instruction and persistent across power cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit words) - fixed organization for deterministic addressing in firmware configuration tables |
| Supply Voltage Range | 1.8 V to 5.5 V - enables direct interfacing with 1.8V logic, 3.3V microcontrollers, and 5V legacy systems without level shifting |
| Max Clock Frequency | 20 MHz at VCC = 5.0 V - supports high-speed parameter loading in real-time control loops |
| Write Endurance | 1,000,000 cycles - sufficient for daily firmware update logging over 27 years of operation |
| Data Retention | 100 years at +25°C - ensures long-term calibration and security key persistence across product lifecycle |
| Operating Temperature | −40°C to +85°C - qualified for under-hood and dashboard-mounted automotive electronics |
| Page Write Size | 32 bytes - minimizes write latency while avoiding excessive wear on single addresses during burst updates |
Pinout & Package
AT25320A-10TI-1.8 is housed in an 8-lead TSSOP package (JEDEC MO-153, variation AA), 3.0 mm × 4.4 mm body, 0.65 mm pitch, lead-free/halogen-free, with exposed pad not connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable signal; must be held low for entire SPI transaction; high impedance SO when CS high |
| SCK | Serial Clock | Master-generated clock input; timing-critical for setup/hold compliance; supports up to 20 MHz at 5V |
| SI | Serial Data Input | MOSI line for op-code, address, and data input; MSB-first transmission per SPI standard |
| SO | Serial Data Output | MISO line for read data output; tri-stated when CS high or during HOLD assertion |
| GND | Ground Reference | Primary return path for VCC current and signal reference; requires low-impedance PCB connection |
| VCC | Power Supply | Single-supply input (1.8–5.5 V); decoupling capacitor (0.1 µF) required within 5 mm of pin |
| WP | Write Protect | Hardware lock for status register and protected memory blocks when WPEN = 1 and WP = low |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without resetting internal state; requires SCK low before assertion |
Key Features
| Feature | Design Value |
|---|---|
| Block Write Protection | Configurable 0%/25%/50%/100% array lock via nonvolatile BP0/BP1 bits - prevents accidental overwrite of critical calibration or security sectors |
| Hardware + Software Write Protection | WP pin + WREN/WRDI instructions provide dual-layer defense against unintended writes during power transients or firmware faults |
| Automotive Grade Qualification | AEC-Q100 stress-tested for −40°C to +85°C operation with 100-year data retention - meets OEM requirements for body electronics |
| Low Standby Current | <0.1 µA at 1.8 V - enables always-on battery-backed storage in vehicle entry systems without measurable drain |
| Page Write Efficiency | 32-byte burst programming reduces total write time by 97% vs. byte-write for full sector updates - accelerates factory programming and field reconfiguration |
Applications
| Automotive Body Control Unit | Industrial PLC Configuration Storage |
|---|---|
Use Scenario: Storing door lock actuator calibration offsets and seat position profiles in a vehicle body control module. IC Role / Device Role / Timing Role: Nonvolatile configuration EEPROM interfaced to an 8-bit automotive MCU via SPI Mode 0 at 5 MHz. Use Value: Enables field-updatable personalization without requiring external backup power or complex FRAM management. | Use Scenario: Retaining I/O mapping and alarm thresholds in a DIN-rail mounted programmable logic controller after power loss. IC Role / Device Role / Timing Role: SPI EEPROM providing deterministic 100-year retention for safety-critical configuration parameters. Use Value: Eliminates need for supercapacitor-based backup, reducing BOM cost and board space in industrial enclosures. |
| Medical Infusion Pump Settings | Smart Energy Meter Calibration Data |
Use Scenario: Securing drug library limits and delivery rate presets in a Class II medical infusion pump with regulatory audit trail requirements. IC Role / Device Role / Timing Role: Tamper-resistant EEPROM with WP-enabled status register lock, accessed during boot initialization. Use Value: Meets IEC 62304 software safety requirements by preventing runtime corruption of dose-critical parameters. | Use Scenario: Storing meter-specific ADC gain/offset coefficients and tariff schedules in a utility-grade smart electricity meter. IC Role / Device Role / Timing Role: High-reliability EEPROM operating at 3.3 V with 1M write endurance for lifetime field recalibration events. Use Value: Guarantees metrological accuracy traceability over 20+ years without periodic hardware replacement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-DRMN3TP/K | 32 Kbit SPI EEPROM, 1.8–5.5 V, 20 MHz max, TSSOP-8, but uses different status register layout and lacks HOLD pin | No HOLD functionality limits use in multi-master SPI systems requiring bus arbitration pause | Select when HOLD is unused and STMicroelectronics supply chain preference applies |
| BR24G32FJ-3GE2 | 32 Kbit I²C EEPROM, 1.7–5.5 V, 1 MHz max, 8-pin TSSOP, no SPI interface or WP/HOLD pins | I²C protocol requires different MCU peripheral configuration and has lower bandwidth than SPI | Select only if system already uses I²C bus and SPI pins are unavailable |
Compared with M95320-DRMN3TP/K and BR24G32FJ-3GE2, the AT25320A-10TI-1.8 uniquely combines SPI Mode 0/3 support, HOLD pin for seamless bus arbitration, and automotive-qualified 100-year retention-making it optimal for real-time embedded systems where deterministic timing and robustness are mandatory.
Availability
AT25320A-10TI-1.8 is available at Aetrix Electronics and suitable for automotive body control units, industrial PLCs, medical infusion pumps, and smart energy meters requiring stable component supply, long-lifecycle support, and AEC-Q100-compliant nonvolatile storage.
Supply support for AT25320A-10TI-1.8 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 leading provider of microcontroller, analog, FPGA, and memory solutions, acquired Atmel in 2016 and maintains full product support for the AT25xxx family.
The AT25320A-10TI-1.8 belongs to Microchip's automotive-qualified SPI serial EEPROM product line, designed specifically for reliable, low-voltage nonvolatile data storage in harsh environments where extended temperature operation and long-term data integrity are critical.
FAQ
What is the maximum clock frequency supported by the AT25320A-10TI-1.8?
The AT25320A-10TI-1.8 supports up to 20 MHz SCK frequency when VCC = 5.0 V. At 1.8 V, the maximum rated clock is 5 MHz per AC characteristics tables. This ensures reliable timing margin across its full 1.8–5.5 V operating range, with tWH/tWL specifications scaled accordingly for each voltage bin.
Does the AT25320A-10TI-1.8 require an external pull-up resistor on the SO pin?
No, the AT25320A-10TI-1.8 does not require an external pull-up on the SO pin. Its SO output is actively driven high or low during read operations and enters high-impedance state when CS is high or HOLD is asserted. External pull-ups may cause bus contention and are not recommended per the device's DC and AC electrical specifications.
How is block write protection configured on the AT25320A-10TI-1.8?
Block write protection on the AT25320A-10TI-1.8 is configured by writing to the status register using the WRSR instruction. Bits BP1 and BP0 determine protection level (0% to 100%), and WPEN bit enables hardware protection via the WP pin. These bits are nonvolatile and retain settings across power cycles, with protection enforced during all write attempts to locked memory regions.
What package type is used for the AT25320A-10TI-1.8?
The AT25320A-10TI-1.8 uses an 8-lead Thin Shrink Small Outline Package (TSSOP), designated as 8A2 per Microchip's ordering guide. It measures 3.0 mm × 4.4 mm with 0.65 mm lead pitch, is lead-free/halogen-free, and complies with JEDEC MO-153, variation AA mechanical standards.
Can the AT25320A-10TI-1.8 operate reliably at −40°C?
Yes, the AT25320A-10TI-1.8 is specified for industrial temperature range (−40°C to +85°C) and fully characterized across this range per DC and AC characteristics tables. Its automotive-grade qualification includes extended temperature stress testing, ensuring guaranteed functionality, 1 million write cycles, and 100-year data retention even at −40°C ambient.
AT25320A-10TI-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 32Kbit
- Memory Organization:
- 4K 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-TSSOP
AT25320A-10TI-1.8 FAQ
1.How can I place an order for AT25320A-10TI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320A-10TI-1.8 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 AT25320A-10TI-1.8 reliable?
The price and inventory of AT25320A-10TI-1.8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT25320A-10TI-1.8 is usually 5 days.
3.What payment methods are accepted for AT25320A-10TI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320A-10TI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320A-10TI-1.8?
AT25320A-10TI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320A-10TI-1.8 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 AT25320A-10TI-1.8?
For technical support, including AT25320A-10TI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320A-10TI-1.8 requirements.
6.How does Aetrix verify that AT25320A-10TI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT25320A-10TI-1.8 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 AT25320A-10TI-1.8 meets industry standards.
7.What is the process for return or replacement of AT25320A-10TI-1.8?
All AT25320A-10TI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320A-10TI-1.8, 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 AT25320A-10TI-1.8 part is unused and in its original packaging.
Return procedure for AT25320A-10TI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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