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25LC320A-I/P
Microchip Technology
IC EEPROM 32KBIT SPI 10MHZ 8DIP
2354 Pcs New Original In Stock
EEPROM Memory IC 32Kbit SPI 10 MHz 8-PDIP
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5.0 / 5.0
- (187 Ratings)
25LC320A-I/P
Product Overview
1237375
DiGi Electronics Part Number
25LC320A-I/P-DGManufacturer
Microchip Technology
25LC320A-I/P
Description
IC EEPROM 32KBIT SPI 10MHZ 8DIPInventory
2354 Pcs New Original In Stock
EEPROM Memory IC 32Kbit SPI 10 MHz 8-PDIP
Quantity
Minimum 1
Minimum 1
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25LC320A-I/P Technical Specifications
Category
Memory, Memory
Packaging
Tube
Series
-
Product Status
Active
DiGi-Electronics 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
10 MHz
Write Cycle Time - Word, Page
5ms
Voltage - Supply
2.5V ~ 5.5V
Operating Temperature
-40°C ~ 85°C (TA)
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Supplier Device Package
8-PDIP
Base Product Number
25LC320
Datasheet & Documents
HTML Datasheet
25LC320A-I/P-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
Other Names
25LC320AIP
Standard Package
60
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Support team responded quickly and were very helpful throughout.
December 02, 2025
Their dedication to professional customer service truly makes a difference.
December 02, 2025
The packaging quality is outstanding, showing their commitment to excellence.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the 25LC320A-I/P in a wide-voltage industrial application with fluctuating power rails?
When integrating the 25LC320A-I/P in industrial systems where supply voltage may fluctuate between 2.5V and 5.5V, a key risk is unreliable write operations during brownout conditions. To mitigate this, always pair the 25LC320A-I/P with a supervisor circuit or voltage monitor (e.g., TC54VC) to inhibit writes below a stable threshold, typically 2.7V. Also, ensure SPI signals are held inactive during power-up/down to prevent unintended commands. The 25LC320A-I/P lacks internal write protection under low voltage, so external control is critical for data integrity in unstable environments.
Can the 25LC320A-I/P replace the AT25128A-10SU-2.7 in an existing SPI memory design without PCB modifications?
The 25LC320A-I/P can replace the AT25128A-10SU-2.7 only with caution—despite both being 8-PDIP SPI EEPROMs, the AT25128A is 128Kbit vs. 32Kbit for the 25LC320A-I/P, which may require firmware changes to handle reduced capacity. Additionally, the AT25128A uses a 16-byte page write limit, while the 25LC320A-I/P allows 32-byte pages. While pin-compatible and both support 10 MHz SPI, verify that your application does not exceed the smaller memory footprint and adjust address mapping accordingly to avoid data corruption.
How does the 5ms write cycle time of the 25LC320A-I/P impact real-time data logging performance and latency in embedded systems?
The 5ms write cycle time of the 25LC320A-I/P can introduce significant latency in real-time data logging if not managed properly. During this period, the device is not responsive to new SPI commands. To avoid bus lockups, design firmware to poll the READY/BUSY status bit via the RDSR instruction before initiating subsequent accesses. Alternatively, use timer-based delays only if timing is predictable. For high-frequency logging, buffer incoming data in microcontroller RAM and write in aggregated bursts aligned with the 5ms window to maintain system responsiveness.
What are the SPI signal integrity considerations when interfacing the 25LC320A-I/P at 10 MHz in a noisy through-hole prototype setup?
At 10 MHz SPI clock rate, signal integrity becomes critical with the 25LC320A-I/P in through-hole designs, which are prone to stray capacitance and longer trace lengths. Use controlled impedance routing or limit trace lengths to under 3 inches to reduce ringing. Terminate the SCK line with a 22–33 Ω series resistor near the 25LC320A-I/P to dampen reflections. Also, keep SPI lines away from noisy digital traces and ensure a solid ground plane. For reliable operation, add 0.1 µF decoupling capacitors at the 25LC320A-I/P’s VCC pin and validate timing with scope measurements to meet setup/hold requirements.
Is the 25LC320A-I/P suitable for long-term data storage in outdoor metering applications, and what are the wear-leveling limitations?
The 25LC320A-I/P is suitable for outdoor metering due to its -40°C to 85°C rating and non-volatile EEPROM reliability, but its 1 million write cycle endurance per byte is a constraint for high-frequency logging. Since the 25LC320A-I/P lacks hardware wear leveling, implement software-level rotation across memory blocks to distribute writes evenly. Avoid frequent updates to fixed addresses (e.g., status flags) without spreading them across the 4K x 8 address space. Pair with a supercapacitor to ensure write completion during power loss, maximizing the 25LC320A-I/P's field reliability over 10+ year deployments.
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.
25LC320A-I/P CAD Models
Microchip Technology 25LC320A-I/P PCB symbols & footprints
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