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AT29C512-90JI
Microchip Technology
IC FLASH 512KBIT PARALLEL 32PLCC
1611 Pcs New Original In Stock
FLASH Memory IC 512Kbit Parallel 90 ns 32-PLCC (13.97x11.43)
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5.0 / 5.0
- (108 Ratings)
AT29C512-90JI
Product Overview
1243872
DiGi Electronics Part Number
AT29C512-90JI-DGManufacturer
Microchip Technology
AT29C512-90JI
Description
IC FLASH 512KBIT PARALLEL 32PLCCInventory
1611 Pcs New Original In Stock
FLASH Memory IC 512Kbit Parallel 90 ns 32-PLCC (13.97x11.43)
Quantity
Minimum 1
Minimum 1
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AT29C512-90JI Technical Specifications
Category
Memory, Memory
Packaging
-
Series
-
Product Status
Obsolete
DiGi-Electronics Programmable
Not Verified
Memory Type
Non-Volatile
Memory Format
FLASH
Technology
FLASH
Memory Size
512Kbit
Memory Organization
64K x 8
Memory Interface
Parallel
Write Cycle Time - Word, Page
10ms
Access Time
90 ns
Voltage - Supply
4.5V ~ 5.5V
Operating Temperature
-40°C ~ 85°C (TC)
Mounting Type
Surface Mount
Package / Case
32-LCC (J-Lead)
Supplier Device Package
32-PLCC (13.97x11.43)
Base Product Number
AT29C512
Datasheet & Documents
HTML Datasheet
AT29C512-90JI-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
2 (1 Year)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0071
Additional Information
Other Names
AT29C51290JI
Standard Package
32
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
합리적인 가격과 훌륭한 고객 지원 덕분에 계속 이용하게 됩니다.
de desembre 02, 2025
非常に満足できる購入体験で、今後も安心して利用できると思います。
de desembre 02, 2025
Bei DiGi Electronics schätzen wir die übersichtliche Webseite und die fairen, kosteneffektiven Angebote sehr.
de desembre 02, 2025
親切丁寧な対応と、充実したアフターサービスに感謝しています。価格も良心的です。
de desembre 02, 2025
高品質な製品と温かい接客に非常に満足しています。
de desembre 02, 2025
Getting quality products at a low price with eco-friendly packaging is such a relief.
de desembre 02, 2025
DiGi Electronics makes it easy to enjoy reliable technology without overspending.
de desembre 02, 2025
Kudos to Di Digi Electronics for their dedication to environmentally friendly packaging solutions.
de desembre 02, 2025
I’m grateful for their affordable pricing and attentive service, which exceed my expectations.
de desembre 02, 2025
I love how straightforward and efficient the website is, making shopping stress-free.
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Frequently Asked Questions (FAQ)
What design risks should I consider when using the AT29C512-90JI in a new product given its obsolete status from Microchip Technology?
Using the AT29C512-90JI in new designs carries significant long-term supply chain risk due to its obsolete status. While 1601 units are currently in stock, future availability is not guaranteed, which can disrupt production and increase procurement costs. Designers should evaluate last-time buy options, secure buffer stock, and identify drop-in replacements such as the SST39SF040-70-4I-B3K or AM29F040B-90JC, which offer similar 512Kbit parallel organization. Additionally, consider implementing a migration path in firmware or hardware to support future memory upgrades without board redesign.
How does the 90 ns access time of the AT29C512-90JI impact its compatibility with fast microcontrollers in real-time systems?
The 90 ns access time of the AT29C512-90JI limits bus speeds to approximately 11 MHz, which may create timing bottlenecks when interfaced with modern microcontrollers or high-speed MCUs like the STM32F4 series running at over 100 MHz. To maintain reliable operation, ensure proper wait-state insertion in the memory controller and validate timing margins across voltage and temperature extremes. Use series termination resistors on address/data lines to mitigate signal reflections on long traces, especially in industrial environments where noise is a concern.
Can the AT29C512-90JI replace the Intel E28F128J3A in legacy industrial controllers, and what interface compatibility issues might arise?
The AT29C512-90JI is not a direct replacement for the Intel E28F128J3A due to differences in memory size (512Kbit vs 128Mbit) and block architecture, despite both being 32-PLCC flash devices. Swapping them requires significant firmware and address decoding changes. Additionally, the AT29C512-90JI lacks sector protection registers and has a longer 10ms write cycle time, which could disrupt real-time write operations. Perform full system validation including boot sequencing and write endurance under actual load conditions.
What are the reliability concerns when operating the AT29C512-90JI near the upper limit of its 85°C temperature range in an enclosed outdoor enclosure?
Operating the AT29C512-90JI at or near 85°C in enclosed outdoor systems increases the risk of data retention failure over time, as elevated temperatures accelerate charge leakage in floating-gate flash cells. Microchip specifies typical data retention of 100 years at room temperature, but this can drop significantly at high temperatures. To mitigate, derate the operating temperature by using thermal vias, heatsinking, or forced ventilation. Monitor ambient temperature with a sensor and limit write cycles in high-temp conditions, as programming reliability also degrades with temperature.
How should I handle the RoHS non-compliance of the AT29C512-90JI in a new design intended for global distribution?
The RoHS non-compliance of the AT29C512-90JI restricts its use in products sold in the EU, China, and other regions with strict environmental regulations. If you must use this device in a legacy or industrial-only design, document the exemption under EU RoHS Article 7 (e.g., for industrial monitoring equipment) and label the product accordingly. For new designs targeting global markets, consider RoHS-compliant alternatives like the MX29GL512FBUIG or S29GL512N10TF1040, which offer comparable parallel flash interfaces and extended temperature support.
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.
AT29C512-90JI CAD Models
Microchip Technology AT29C512-90JI PCB symbols & footprints
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