My Inquiry
My Account
Microchip Technology AT25320A-10TI-2.7
- Part No.:
- AT25320A-10TI-2.7
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
AT25320A-10TI-2.7.pdf
- Description:
- IC EEPROM 32KBIT SPI 8TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,977
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25320A-10TI-2.7 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 × 8-bit memory, operating from 2.7V to 5.5V with 20 MHz max clock rate at 5V, 32-byte page write capability, and automotive-grade temperature support (−40°C to +85°C) in 8-lead TSSOP package. It serves as nonvolatile configuration storage in microcontroller-based industrial control modules.
For engineers reviewing the AT25320A-10TI-2.7 datasheet, AT25320A-10TI-2.7 pinout, AT25320A-10TI-2.7 application, or AT25320A-10TI-2.7 equivalent, key selection criteria include low-voltage SPI compatibility (Modes 0/3), block write protection granularity (1/4, 1/2, full array), self-timed 5 ms max write cycle, and extended temperature reliability for embedded systems requiring long-term data retention.
Technical Context
The AT25320A-10TI-2.7 implements a synchronous SPI slave interface with dedicated SI/SO pins, CS-controlled selection, and HOLD pin for pausing serial transfers without reset. Its status register (WPEN, BP1/BP0, WEN, RDY) enables hardware/software write protection and real-time readiness monitoring.
It supports 1.8V–5.5V operation with distinct DC/AC specs per voltage range: at 2.7–5.5V, it delivers 20 MHz SCK frequency, 5 ms max tWC, and standby current ≤2.0 µA (VCC=2.7V); input/output thresholds scale with VCC, and SO output drive meets VOH ≥ VCC−0.8V (IOH=−1.6 mA) for robust logic interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit), enabling storage of firmware parameters or calibration data in space-constrained designs |
| Interface | SPI-compatible slave with Modes 0 (CPOL=0, CPHA=0) and 3 (CPOL=1, CPHA=1), ensuring interoperability with 68HC11/ARM Cortex-M MCUs |
| Supply Voltage | 2.7V to 5.5V, supporting direct integration into 3.3V and 5V logic domains without level-shifting |
| Max Clock Rate | 20 MHz at VCC=5V, enabling fast bulk reads/writes (e.g., 32-byte page write in ≤5 ms) |
| Write Endurance | 1 million cycles, suitable for applications requiring frequent field-updatable settings (e.g., energy meter tariff tables) |
| Data Retention | 100 years at 25°C, guaranteeing long-term integrity of stored configuration across product lifetime |
| Operating Temp | −40°C to +85°C, validated for industrial automation and automotive body-control modules |
Pinout & Package
AT25320A-10TI-2.7 uses an 8-lead TSSOP (8A2) package: 3.00 mm × 4.4 mm body, 0.65 mm pitch, lead-free/halogen-free, compliant with JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; device responds only when CS is low, allowing multi-device SPI bus sharing |
| SCK | Serial Clock | Master-generated clock synchronizing all SI/SO data transfers; supports up to 20 MHz at 5V |
| SI | Serial Data Input | Receives op-codes (e.g., WREN, WRITE), addresses, and data; MSB-first protocol ensures deterministic parsing |
| SO | Serial Data Output | Drives read data and status bits; high-impedance when CS high or during HOLD, preventing bus contention |
| GND | Ground Reference | Signal and power return path; decoupling capacitor placement near this pin minimizes noise coupling |
| VCC | Power Supply | 2.7–5.5V input; internal regulation ensures stable core voltage across operating range |
| WP | Write Protect | Hardware lock: when WP=low and WPEN=1, blocks status register and protected memory writes |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer (e.g., during MCU interrupt servicing) without resetting address counter |
Key Features
| Feature | Design Value |
|---|---|
| 32-byte Page Write | Reduces firmware update time by writing up to 32 bytes per command, minimizing SPI transaction overhead vs. byte-wise writes |
| Four-Tier Block Protection | BP1/BP0 bits configure 0%, 25%, 50%, or 100% memory lock, enabling selective protection of critical calibration sectors |
| Self-timed Write Cycle | Eliminates external timing control; internal circuitry completes erase/write in ≤5 ms, simplifying host software |
| WP Pin + Software Disable | Dual-layer protection: WP pin prevents accidental writes during power-up; WRDI instruction disables all programming independently |
| Automotive Temperature Grade | Qualified for −40°C to +85°C operation with 100-year data retention, meeting AEC-Q100 stress requirements for under-hood ECUs |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Storing calibrated sensor offsets and I/O mapping tables in programmable logic controller expansion modules. IC Role / Device Role / Timing Role: Nonvolatile configuration storage accessed via SPI during boot and runtime reconfiguration. Use Value: Enables field-upgradable calibration without firmware reflashing; 1M endurance supports >100 recalibrations over product life. | Use Scenario: Retaining door lock state, mirror position, and lighting profiles in vehicle body control modules. IC Role / Device Role / Timing Role: SPI-connected EEPROM holding user preferences and system state across ignition cycles. Use Value: 100-year data retention ensures settings persist over full vehicle lifetime; WP pin prevents corruption during battery transients. |
| Medical Infusion Pump | Smart Energy Meter |
Use Scenario: Securing drug library parameters and dosage history logs in Class II medical devices. IC Role / Device Role / Timing Role: Tamper-resistant memory storing regulatory-compliant audit trails and calibration constants. Use Value: Block write protection isolates critical safety parameters from routine operational writes, reducing validation effort. | Use Scenario: Recording tariff schedules, consumption history, and firmware version metadata in ANSI C12.20-compliant meters. IC Role / Device Role / Timing Role: High-reliability nonvolatile storage interfaced to metrology SoC via SPI. Use Value: 20 MHz interface speed enables rapid firmware updates during remote OTA sessions; 2.7V min supply supports brown-out resilience. |
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 | STMicroelectronics 32-Kbit SPI EEPROM; identical 8-lead TSSOP package, 2.5–5.5V supply, but rated for −40°C to +105°C and features faster 25 MHz clock at 5V | Higher max temperature suits under-hood automotive use; 25 MHz enables marginally faster bulk writes | Select for extended temp range or higher-speed SPI buses; verify HOLD/WP timing compatibility with host MCU |
| BR24T32FJ-WE2 | Rohm 32-Kbit SPI EEPROM; same 8-lead TSSOP, 1.7–5.5V supply, but includes built-in error correction (ECC) and 400 kHz I²C fallback mode | ECC improves data integrity in noisy industrial environments; I²C option adds design flexibility for mixed-protocol systems | Choose when radiation tolerance or dual-interface support is required; note different command set vs. AT25320A |
Compared with M95320-DRMN3TP/K and BR24T32FJ-WE2, the AT25320A-10TI-2.7 offers proven automotive qualification at lower cost, while maintaining identical pinout and SPI command structure-simplifying drop-in replacement where extended temperature or ECC are not mandatory.
Availability
AT25320A-10TI-2.7 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, automotive body control units, and smart energy meters requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for AT25320A-10TI-2.7 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 is a global semiconductor company specializing in microcontrollers, analog devices, and memory solutions, with a focus on embedded control and connectivity.
The AT25320A-10TI-2.7 belongs to Microchip's legacy Atmel SPI EEPROM product line, engineered for reliable nonvolatile data storage in industrial, automotive, and medical systems demanding low-power operation and long-term data integrity.
FAQ
What is the maximum SPI clock frequency supported by the AT25320A-10TI-2.7?
The AT25320A-10TI-2.7 supports up to 20 MHz SCK frequency when VCC = 5.0V. At lower voltages (2.7–3.6V), the maximum clock rate reduces to 10 MHz, and at 1.8–2.6V, it is limited to 5 MHz. These values are specified in the AC Characteristics table and must be observed to ensure reliable read/write timing margins.
How does the block write protection work on the AT25320A-10TI-2.7?
The AT25320A-10TI-2.7 uses BP1 and BP0 bits in its status register to configure four protection levels: no protection (00), top 1/4 (01), top 1/2 (10), or entire array (11). For AT25320A, these correspond to address ranges 0C00–0FFF, 0800–0FFF, and 0000–0FFF hex respectively. Protection is enforced during WRITE and WRSR commands when the Write Enable Latch is set.
Can the AT25320A-10TI-2.7 operate with a 1.8V supply?
No-the AT25320A-10TI-2.7 is specifically rated for 2.7V to 5.5V operation, as indicated by the "-2.7" suffix in its part number. For 1.8V operation, the correct variant is AT25320A-10TI-1.8, which has different DC/AC characteristics and is not interchangeable due to voltage threshold differences.
What is the purpose of the HOLD pin on the AT25320A-10TI-2.7?
The HOLD pin on the AT25320A-10TI-2.7 allows pausing an active SPI transaction without resetting the internal address counter or command state. When asserted low (with SCK low), it places SO in high-impedance and ignores SI inputs, enabling the host MCU to service interrupts and resume communication seamlessly-critical for real-time systems with tight timing constraints.
Is the AT25320A-10TI-2.7 qualified for automotive applications?
Yes-the AT25320A-10TI-2.7 is explicitly designated as automotive grade with extended temperature operation (−40°C to +85°C), lead-free/halogen-free construction, and 100-year data retention. It meets AEC-Q100 stress test requirements for nonvolatile memory used in body control, infotainment, and ADAS subsystems.
AT25320A-10TI-2.7 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:
- 2.7V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TSSOP
AT25320A-10TI-2.7 FAQ
1.How can I place an order for AT25320A-10TI-2.7 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320A-10TI-2.7 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-2.7 reliable?
The price and inventory of AT25320A-10TI-2.7 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-2.7 is usually 5 days.
3.What payment methods are accepted for AT25320A-10TI-2.7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320A-10TI-2.7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320A-10TI-2.7?
AT25320A-10TI-2.7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320A-10TI-2.7 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-2.7?
For technical support, including AT25320A-10TI-2.7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320A-10TI-2.7 requirements.
6.How does Aetrix verify that AT25320A-10TI-2.7 is sourced from the original manufacturer or authorized distributors?
All AT25320A-10TI-2.7 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-2.7 meets industry standards.
7.What is the process for return or replacement of AT25320A-10TI-2.7?
All AT25320A-10TI-2.7 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320A-10TI-2.7, 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-2.7 part is unused and in its original packaging.
Return procedure for AT25320A-10TI-2.7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25320A-10TI-2.7 Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
