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AT25040B-XHL-T
Microchip Technology
IC EEPROM 4KBIT SPI 20MHZ 8TSSOP
18688 Pcs New Original In Stock
EEPROM Memory IC 4Kbit SPI 20 MHz 8-TSSOP
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5.0 / 5.0
- (475 Ratings)
AT25040B-XHL-T
Product Overview
1402168
DiGi Electronics Part Number
AT25040B-XHL-T-DGManufacturer
Microchip Technology
AT25040B-XHL-T
Description
IC EEPROM 4KBIT SPI 20MHZ 8TSSOPInventory
18688 Pcs New Original In Stock
EEPROM Memory IC 4Kbit SPI 20 MHz 8-TSSOP
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
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AT25040B-XHL-T Technical Specifications
Category
Memory, Memory
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
DiGi-Electronics Programmable
Not Verified
Memory Type
Non-Volatile
Memory Format
EEPROM
Technology
EEPROM
Memory Size
4Kbit
Memory Organization
512 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
AT25040
Datasheet & Documents
HTML Datasheet
AT25040B-XHL-T-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0051
Additional Information
Other Names
AT25040B-XHL-TTR
1611-AT25040B-XHL-TCT
AT25040B-XHL-T-899
AT25040B-XHL-TCT
1611-AT25040B-XHL-TDKR
AT25040B-XHL-TDKR
AT25040B-XHL-T-899-DG
1611-AT25040B-XHL-TTR
1611-AT25040B-XHL-TTRINACTIVE
AT25040BXHLT
1611-AT25040B-XHL-TDKR-DG
1611-AT25040B-XHL-TDKRINACTIVE
AT25040B-XHL-T-DG
1611-AT25040B-XHL-TTR-DG
Standard Package
5,000
Alternative Parts
View DetailsPART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
R1EX25004ATA00I#S0
Renesas Electronics Corporation
3874
R1EX25004ATA00I#S0-DG
0.3660
MFR Recommended
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Grâce à leur logistique efficace, j’ai évité beaucoup de soucis liés à la gestion des envois.
Dec 02, 2025
Ich bin begeistert: umweltfreundliche Verpackung und niedrige Preise – was will man mehr?
Dec 02, 2025
DiGi Electronics has shown commendable reliability in both product quality and delivery schedules.
Dec 02, 2025
The company's responsiveness after a sale is remarkable; they prioritize customer satisfaction.
Dec 02, 2025
Customer support was swift and resolving my concerns without delay.
Dec 02, 2025
Shopping here feels like dealing with friends who want the best for you.
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Frequently Asked Questions (FAQ)
What are the key reliability risks when using the AT25040B-XHL-T in high-temperature industrial environments near its 85°C limit, and how can I mitigate them?
Operating the AT25040B-XHL-T near its maximum rated temperature of 85°C increases the risk of accelerated data retention degradation and potential write cycle failure due to thermal stress on the floating-gate structure. To mitigate this, ensure adequate PCB thermal management—use thermal vias under the 8-TSSOP package, maintain spacing from heat-generating components, and consider derating the write frequency at elevated temperatures. Additionally, implement periodic background data integrity checks and avoid frequent writes during peak thermal conditions to extend effective lifespan in harsh environments.
Can I safely replace the AT25040B-XHL-T with the BR25H040FVT-2CE2 in an existing 3.3V SPI design without firmware changes?
While the BR25H040FVT-2CE2 is a pin-compatible substitute with similar 4Kbit SPI EEPROM functionality, it operates at a slightly different voltage range (2.5V–3.6V) compared to the AT25040B-XHL-T’s 1.8V–5.5V range. In a 3.3V system, this is generally acceptable, but you must verify timing compatibility—the BR25H040FVT-2CE2 has a max clock frequency of 10 MHz versus the AT25040B-XHL-T’s 20 MHz. If your current design runs below 10 MHz, replacement is feasible; otherwise, you risk communication errors. Also, confirm that the HOLD# and WP# pin behaviors match your firmware expectations to avoid unintended write protection states.
How does the AT25040B-XHL-T’s 5ms page write time impact real-time data logging applications, and what design strategies can minimize system downtime?
The AT25040B-XHL-T’s 5ms page write time can block SPI bus access during writes, creating latency that may disrupt time-critical logging loops. To minimize impact, implement a dual-buffering scheme in your microcontroller firmware: collect sensor data in a RAM buffer while allowing asynchronous writes to the EEPROM. Use the AT25040B-XHL-T’s status register to poll for write completion instead of blocking delays. For high-frequency logging, consider distributing writes across multiple pages or supplementing with a faster FRAM (e.g., FM25L16B) for temporary storage, offloading only critical data to the AT25040B-XHL-T during idle periods.
Is the AT25040B-XHL-T suitable for battery-powered IoT nodes operating at 1.8V, and what power-saving techniques should I apply during idle states?
Yes, the AT25040B-XHL-T is well-suited for low-voltage IoT applications down to 1.8V, but you must manage power carefully. At 1.8V, the device consumes minimal standby current (typically <1 µA), but ensure your SPI master disables chip select (CS#) properly to prevent leakage through I/O pins. Avoid leaving MOSI/MISO lines floating—use pull-ups or configure MCU pins as outputs driven low when inactive. Additionally, batch write operations to reduce the number of wake cycles, and leverage the deep power-down mode (if supported via opcode) during extended sleep periods to maximize battery life in remote sensing nodes.
What are the risks of using the AT25040B-XHL-T in a daisy-chained SPI configuration with other memory devices, and how can signal integrity be maintained?
Daisy-chaining the AT25040B-XHL-T with other SPI devices increases capacitive loading on the shared bus, which can degrade signal rise/fall times—especially at its max 20 MHz clock rate. This may cause setup/hold time violations, leading to read/write errors. To mitigate, keep trace lengths short, use series termination resistors (e.g., 22–33 Ω) near the AT25040B-XHL-T’s inputs, and ensure all devices support compatible SPI modes (Mode 0 or 3). Avoid mixing devices with differing input thresholds; if necessary, level-shift signals. Also, verify that only one device drives MISO at a time to prevent bus contention, and consider reducing clock speed during initialization or noisy operational phases.
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.
AT25040B-XHL-T CAD Models
Microchip Technology AT25040B-XHL-T PCB symbols & footprints
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