My Inquiry
My Account
Microchip Technology AT25320AY1-10YI-1.8
- Part No.:
- AT25320AY1-10YI-1.8
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
AT25320AY1-10YI-1.8.pdf
- Description:
- IC EEPROM 32KBIT SPI 20MHZ 8MAP
- Quantity:
- Payment:
- Shipping:
Inventory:1,715
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT25320AY1-10YI-1.8 from Microchip Technology (formerly Atmel) is a 32-Kbit SPI serial EEPROM organized as 4096 × 8-bit memory, operating from 1.8V to 5.5V with 20 MHz max clock rate at 5V, 32-byte page write capability, and automotive-grade industrial temperature range (−40°C to +85°C). It serves as nonvolatile configuration storage in microcontroller-based automotive control modules.
For engineers reviewing the AT25320AY1-10YI-1.8 datasheet, AT25320AY1-10YI-1.8 pinout, AT25320AY1-10YI-1.8 application, or AT25320AY1-10YI-1.8 equivalent, key selection considerations include 1.8V low-voltage operation, hardware/software write protection via WP pin and status register, 1 million write endurance, 100-year data retention, and compatibility with SPI Mode 0/3 interfaces in space-constrained automotive PCBs.
Technical Context
The AT25320AY1-10YI-1.8 implements a synchronous serial peripheral interface (SPI) slave architecture with separate SI/SO lines, MSB-first data transfer, and CS-driven command framing. Its internal instruction register supports WREN/WRDI/RDSR/WRSR/READ/WRITE op-codes, enabling precise control of write enable state and block protection levels.
Block write protection is configured via nonvolatile BP0/BP1 bits in the status register, allowing selective locking of 0%, 25%, 50%, or 100% of the 4096-word array. The HOLD pin suspends ongoing serial communication without resetting the sequence, while the WP pin-when enabled via WPEN bit-blocks all status register writes during low assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 32 Kbit (4096 × 8-bit), directly addressable via 12-bit A11–A0 addressing |
| Supply Voltage | 1.8V to 5.5V - enables direct interfacing with 1.8V logic and mixed-voltage systems |
| Max Clock Rate | 20 MHz at VCC = 5.0V - supports high-throughput configuration reads in real-time control loops |
| Page Write Size | 32 bytes - minimizes write latency for burst parameter updates without full-array erase |
| Write Endurance | 1 million cycles - sufficient for firmware update logging or calibration counter storage |
| Data Retention | 100 years at 25°C - ensures long-term reliability in automotive ECU lifetime applications |
| Operating Temp | −40°C to +85°C - qualified for under-hood and cabin-mounted automotive electronics |
Pinout & Package
AT25320AY1-10YI-1.8 uses an 8-lead Miniature Array Package (MAP), 4.90 mm × 3.00 mm body, non-leaded, dual footprint compatible with SOIC/TSSOP layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS | Chip Select | Active-low enable; initiates SPI command sequence and places SO in high-Z when deasserted |
| SCK | Serial Clock | Master-generated clock; timing reference for SI sampling and SO output (Mode 0/3 compliant) |
| SI | Serial Data Input | Receives op-code, address, and data; MSB-first, sampled on SCK rising edge (Mode 0) |
| SO | Serial Data Output | Drives read data and status bits; high-Z when CS high or HOLD active |
| WP | Write Protect | Hardware lock for status register when WPEN = 1; prevents accidental configuration corruption |
| HOLD | Communication Suspend | Pauses ongoing SPI transfer without losing internal address/state; requires SCK low to assert |
| VCC | Power Supply | 1.8V–5.5V input; powers core logic and I/O buffers; supports brown-out tolerant operation |
| GND | Ground | Reference return path for all digital signals and supply current |
Key Features
| Feature | Design Value |
|---|---|
| SPI Mode 0 & 3 Support | Interoperates with diverse MCU families including 68HC11 and modern ARM Cortex-M SPI peripherals |
| 1.8V Low-Voltage Operation | Eliminates level-shifting requirements in battery-backed or ultra-low-power subsystems |
| Block Write Protection | Configurable 0%/25%/50%/100% array locking via nonvolatile BP0/BP1 bits for secure firmware partitioning |
| Self-timed Write Cycle | 5 ms max internal programming time; no external delay or polling required beyond RDSR READY check |
| Automotive Qualification | AEC-Q100 stress-tested; lead-free/halogen-free packaging meets automotive RoHS and ELV directives |
Applications
| Engine Control Unit (ECU) | Advanced Driver Assistance Systems (ADAS) |
|---|---|
Use Scenario: Storing adaptive fuel trim tables and fault code history across ignition cycles. IC Role / Device Role / Timing Role: Nonvolatile configuration memory accessed via SPI during boot and runtime calibration. Use Value: 100-year data retention ensures integrity over vehicle lifetime; 1.8V operation enables direct connection to low-power CAN microcontrollers. | Use Scenario: Saving camera calibration offsets and radar sensor fusion parameters after factory alignment. IC Role / Device Role / Timing Role: Secure parameter storage with hardware write protection preventing runtime corruption during OTA updates. Use Value: Block protection (BP0/BP1) isolates critical calibration sectors from application-layer writes, enhancing functional safety compliance. |
| Body Control Module (BCM) | Infotainment System |
Use Scenario: Retaining user preferences (seat position, mirror angle, lighting profiles) after power-down. IC Role / Device Role / Timing Role: Low-power SPI EEPROM interfaced to 32-bit automotive MCU with 1.8V I/O banks. Use Value: 0.1 µA standby current at 1.8V extends battery life in always-on modules; TSSOP/MAP package fits tight PCB spaces. | Use Scenario: Storing display brightness settings, audio equalizer presets, and Bluetooth pairing keys. IC Role / Device Role / Timing Role: Configuration memory accessed during system initialization and user interaction events. Use Value: 20 MHz SPI speed enables sub-millisecond read access for responsive UI updates; 32-byte page write reduces save latency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| M95320-DFMN6TP | 32 Kbit SPI EEPROM, 1.8–5.5V, 20 MHz, but uses standard SOIC-8 (8S1) not MAP (8Y1); no HOLD pin | Lacks HOLD functionality; suitable where suspend capability is unnecessary and SOIC layout exists | Select when board reuse of legacy SOIC footprint is required and HOLD is unused |
| BR24G32FJ-3GE2 | 32 Kbit I²C EEPROM, 1.7–5.5V, 1 MHz max, 8-pin TSSOP (8A2); different interface protocol and timing | Requires I²C master instead of SPI; slower write/read due to lower clock rate and no page-write optimization | Choose only if system already uses I²C bus and SPI resources are constrained |
Compared with M95320-DFMN6TP and BR24G32FJ-3GE2, the AT25320AY1-10YI-1.8 uniquely combines 1.8V SPI operation, HOLD pin support, MAP package for space savings, and automotive temperature qualification - making it optimal for new automotive designs prioritizing interface flexibility and footprint efficiency.
Availability
AT25320AY1-10YI-1.8 is available at Aetrix Electronics and suitable for automotive control units, ADAS calibration storage, body electronics, and infotainment configuration requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT25320AY1-10YI-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 is a global provider of microcontrollers, analog components, and memory solutions, acquired Atmel in 2016 and maintains its legacy serial EEPROM product lines with full technical and manufacturing continuity.
The AT25320AY1-10YI-1.8 belongs to Microchip's AT25xxx family of SPI EEPROMs, designed specifically for automotive, industrial, and consumer applications demanding reliable, low-voltage, high-endurance nonvolatile storage in compact packages.
FAQ
What is the maximum clock frequency supported by the AT25320AY1-10YI-1.8 at 1.8V supply?
The AT25320AY1-10YI-1.8 supports up to 5 MHz SCK frequency when VCC = 1.8V to 3.6V, per AC Characteristics Table on page 5 of the datasheet. This ensures robust timing margins in low-voltage automotive subsystems while maintaining compatibility with common MCU SPI peripherals.
Does the AT25320AY1-10YI-1.8 require an external pull-up resistor on the SO pin?
No, the AT25320AY1-10YI-1.8 features an actively driven SO output with push-pull structure - no external pull-up is needed. The SO pin transitions to high-impedance only when CS is high or HOLD is asserted, eliminating bus contention risks in multi-slave SPI configurations.
How is write protection implemented on the AT25320AY1-10YI-1.8?
The AT25320AY1-10YI-1.8 implements dual-layer write protection: hardware protection via the WP pin (enabled by WPEN bit) and software protection via BP0/BP1 bits in the status register. When WP is low and WPEN = 1, all status register writes are blocked; BP0/BP1 then define protected memory segments (0%, 25%, 50%, or 100%).
Can the AT25320AY1-10YI-1.8 be used in extended temperature applications up to +125°C?
No - the AT25320AY1-10YI-1.8 is rated for −40°C to +85°C (industrial grade). For extended temperature operation up to +125°C, Microchip offers variants like AT25320AN-10SE-2.7 (SOIC-8, −40°C to +125°C), which must be selected explicitly as the Y1 MAP package is not qualified beyond +85°C.
What is the purpose of the HOLD pin on the AT25320AY1-10YI-1.8?
The HOLD pin on the AT25320AY1-10YI-1.8 allows pausing an ongoing SPI transaction without resetting the internal address counter or command state. When asserted low while SCK is low, it places SO in high-Z and ignores SI inputs; resuming requires bringing HOLD high while SCK remains low - preserving partial transfers during MCU interrupt servicing.
AT25320AY1-10YI-1.8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- 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-MAP (3x4.9)
AT25320AY1-10YI-1.8 FAQ
1.How can I place an order for AT25320AY1-10YI-1.8 through Aetrix?
Please submit a Request for Quotation (RFQ) for AT25320AY1-10YI-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 AT25320AY1-10YI-1.8 reliable?
The price and inventory of AT25320AY1-10YI-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 AT25320AY1-10YI-1.8 is usually 5 days.
3.What payment methods are accepted for AT25320AY1-10YI-1.8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT25320AY1-10YI-1.8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT25320AY1-10YI-1.8?
AT25320AY1-10YI-1.8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT25320AY1-10YI-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 AT25320AY1-10YI-1.8?
For technical support, including AT25320AY1-10YI-1.8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT25320AY1-10YI-1.8 requirements.
6.How does Aetrix verify that AT25320AY1-10YI-1.8 is sourced from the original manufacturer or authorized distributors?
All AT25320AY1-10YI-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 AT25320AY1-10YI-1.8 meets industry standards.
7.What is the process for return or replacement of AT25320AY1-10YI-1.8?
All AT25320AY1-10YI-1.8 units undergo pre-shipment inspection (PSI). If there is an issue with AT25320AY1-10YI-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 AT25320AY1-10YI-1.8 part is unused and in its original packaging.
Return procedure for AT25320AY1-10YI-1.8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT25320AY1-10YI-1.8 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…
