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AT25640A-10TU-1.8
Microchip Technology
IC EEPROM 64KBIT SPI 8TSSOP
5410 Pcs New Original In Stock
EEPROM Memory IC 64Kbit SPI 20 MHz 8-TSSOP
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5.0 / 5.0
- (190 Ratings)
AT25640A-10TU-1.8
Product Overview
1410295
DiGi Electronics Part Number
AT25640A-10TU-1.8-DGManufacturer
Microchip Technology
AT25640A-10TU-1.8
Description
IC EEPROM 64KBIT SPI 8TSSOPInventory
5410 Pcs New Original In Stock
EEPROM Memory IC 64Kbit SPI 20 MHz 8-TSSOP
Quantity
Minimum 1
Minimum 1
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AT25640A-10TU-1.8 Technical Specifications
Category
Memory, Memory
Packaging
-
Series
-
Product Status
Obsolete
DiGi-Electronics Programmable
Not Verified
Memory Type
Non-Volatile
Memory Format
EEPROM
Technology
EEPROM
Memory Size
64Kbit
Memory Organization
8K x 8
Memory Interface
SPI
Clock Frequency
20 MHz
Write Cycle Time - Word, Page
5ms
Voltage - Supply
1.8V ~ 5.5V
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Surface Mount
Package / Case
8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package
8-TSSOP
Base Product Number
AT25640
Datasheet & Documents
HTML Datasheet
AT25640A-10TU-1.8-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0051
Additional Information
Standard Package
100
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
R1EX25064ATA00I#S0
Renesas Electronics Corporation
2370
R1EX25064ATA00I#S0-DG
0.6021
MFR Recommended
Reviews
5.0/5.0-(Show up to 5 Ratings)
грудня 02, 2025
La rapidité de traitement des commandes est remarquable, grâce à leur logistique parfaitement huilée.
грудня 02, 2025
Every purchase confirms their dedication to maintaining high standards.
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Their products strip away unnecessary costs while maintaining dependability.
грудня 02, 2025
Timely shipping from DiGi Electronics has been my favorite part of dealing with them; it helps us stay on schedule consistently.
грудня 02, 2025
The materials used by DiGi Electronics are of premium quality, ensuring long-term performance.
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Frequently Asked Questions (FAQ)
Can the AT25640A-10TU-1.8 be used in a battery-powered sensor node operating at 1.8V, and what are the implications for SPI communication timing?
Yes, the AT25640A-10TU-1.8 supports supply voltages down to 1.8V, making it suitable for low-power battery-operated designs. However, at 1.8V, the maximum SPI clock frequency is limited to approximately 10 MHz (vs. 20 MHz at 5V), which must be accounted for in firmware timing. Ensure your microcontroller’s SPI peripheral can scale its clock accordingly during low-voltage operation to prevent data corruption. Also, verify that the SPI bus pull-ups (if used) are high-impedance to avoid unnecessary current draw.
What are the key design risks when replacing the AT25640A-10TU-1.8 with the M95640-DRDW3TP/K in an existing PCB layout?
While the M95640-DRDW3TP/K (STMicroelectronics) is a functionally similar 64Kbit SPI EEPROM in 8-TSSOP, key risks include differences in write cycle timing and SPI mode defaults. The AT25640A-10TU-1.8 uses SPI Mode 0 by default, while the M95640 may require explicit configuration. Also, confirm hold time requirements on the M95640, as signal integrity margins may be tighter. Validate command set compatibility — such as write enable and status register access — to avoid silent write failures during field operation.
How does the obsolete status of the AT25640A-10TU-1.8 impact long-term reliability and supply chain planning for a new design?
The obsolete status of the AT25640A-10TU-1.8 indicates no new production from Microchip, increasing long-term supply risk despite current stock availability. For new designs, this presents a reliability risk not in device performance but in lifecycle support. Plan for last-time buys or redesigns, and consider pin- and code-compatible alternatives like the CAT25640YI-GT3 (ON Semiconductor), which offers similar specs and ongoing availability. Include migration paths in firmware (e.g., configurable timing delays) to ease future replacements.
What PCB layout considerations help prevent write corruption in the AT25640A-10TU-1.8 during power transients in automotive environments?
In automotive or noisy environments, ensure the AT25640A-10TU-1.8 has a stable 1.8V–5.5V supply using a low-noise LDO and local decoupling with a 100nF ceramic capacitor placed within 5mm of VCC. Add a 1–10µF bulk capacitor if load currents fluctuate. Avoid routing SPI lines near switching signals, and use controlled trace lengths to minimize ringing. Enable the device's write protection (if using WP pin) during power-up/down phases to prevent unintended writes during brown-out conditions.
Is the BR25S640FVT-WE2 a drop-in replacement for the AT25640A-10TU-1.8, and what firmware changes are needed?
The BR25S640FVT-WE2 (Rohm) is a close alternative in 8-TSSOP with 64Kbit SPI EEPROM, but it is not a complete drop-in replacement. While pinout and supply range match, differences in status register bits — such as ready/busy flag polarity — require firmware updates to polling logic. Also, confirm that page write size (32 bytes for AT25640A-10TU-1.8) matches the BR25S640FVT-WE2 timing and address boundaries. Always validate the hold time (tHOLD) and setup time (tSETUP) in your MCU driver to prevent corruption after replacement.
Quality Assurance (QC)
DiGi ensures the quality and authenticity of every electronic component through professional inspections and batch sampling, guaranteeing reliable sourcing, stable performance, and compliance with technical specifications, helping customers reduce supply chain risks and confidently use components in production.
AT25640A-10TU-1.8 CAD Models
Microchip Technology AT25640A-10TU-1.8 PCB symbols & footprints
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