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AT29C512-90JC
Microchip Technology
IC FLASH 512KBIT PARALLEL 32PLCC
2004 Pcs New Original In Stock
FLASH Memory IC 512Kbit Parallel 90 ns 32-PLCC (13.97x11.43)
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*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (141 Ratings)
AT29C512-90JC
Product Overview
1290029
DiGi Electronics Part Number
AT29C512-90JC-DGManufacturer
Microchip Technology
AT29C512-90JC
Description
IC FLASH 512KBIT PARALLEL 32PLCCInventory
2004 Pcs New Original In Stock
FLASH Memory IC 512Kbit Parallel 90 ns 32-PLCC (13.97x11.43)
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
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365 - Day Quality Guarantee - Every part fully backed.
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AT29C512-90JC 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
0°C ~ 70°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
AT29C512-90JC-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
AT29C51290JC
Standard Package
32
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
每次購買都讓我讚賞他們的準時出貨，效率很高，無延遲的經驗令人放心。
de desembre 02, 2025
DiGi Electronics的客服團隊非常有禮貌，回答問題的時間也很快，整體服務水準很高。
de desembre 02, 2025
價格非常優惠，配送速度快，讓我不用等待太久就能玩到最新的電子玩具！
de desembre 02, 2025
Excellent response time on shipping and very safe packaging.
de desembre 02, 2025
Their after-sales response was prompt and informative, making me feel valued as a customer.
de desembre 02, 2025
Every interaction with their customer service was pleasant and helpful.
de desembre 02, 2025
Fast shipping and good prices make this a reliable supplier for electronics needs.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when integrating the AT29C512-90JC into a new embedded system given its obsolete status?
Using the AT29C512-90JC in new designs carries significant long-term supply chain risk due to its obsolete status. While 1900 units are in stock now, future availability is uncertain, which can disrupt production and maintenance. Engineers should evaluate last-time buy options and plan for redesigns using modern SPI or parallel NOR flash alternatives like the Cypress S29GL064 or Winbond W25Q512JV. Additionally, consider obsolescence mitigation strategies such as stocking spares or implementing device emulation through FPGA-based memory solutions to ensure long-term product support.
How does the 90 ns access time of the AT29C512-90JC impact system performance in high-speed microprocessor interfaces?
The 90 ns access time of the AT29C512-90JC limits its compatibility with microprocessors or microcontrollers requiring faster memory access, such as those with bus speeds exceeding 10 MHz. In high-speed designs, this can introduce wait states, reducing overall throughput. To mitigate performance bottlenecks, verify that your processor's timing budget accommodates this delay, especially in instruction fetch or data lookup-intensive applications. If performance is critical, consider replacing the AT29C512-90JC with faster 70 ns or 55 ns alternatives (e.g., ISSI IS29LV5128) or transitioning to modern paged-access SPI flash with cache controllers to maintain speed with lower pin count.
Can the AT29C512-90JC replace the Intel E28F008SA in an existing industrial control board design?
Direct replacement of the Intel E28F008SA with the AT29C512-90JC is not recommended without careful evaluation. While both are 5V parallel flash devices, the E28F008SA offers 1Mbit (128K x 8) vs. the AT29C512-90JC’s 512Kbit (64K x 8), requiring potential address map changes. Additionally, command set differences exist—Intel uses ICF and software commands, while the AT29C512-90JC uses Atmel’s specific write sequencing. Interface timing and CE/OE/WE signal handling must also be validated. A successful drop-in swap depends on firmware memory management layer flexibility and PCB trace routing headroom.
What are the reliability concerns when using the AT29C512-90JC in automotive or industrial environments near its 70°C max operating temperature?
The AT29C512-90JC is rated only up to 70°C (Tc), making it unsuitable for automotive or industrial applications with elevated ambient temperatures, where junction temperatures can exceed ratings due to self-heating or enclosure conditions. Operation near or above the limit increases bit error rates and reduces retention time. For designs requiring higher robustness, consider industrial-temperature-grade replacements such as the Microchip SST39VF512A (-40°C to 105°C) or use active cooling and thermal monitoring to derate the AT29C512-90JC safely. Always monitor case temperature in deployed systems to avoid latent data corruption, especially in write-inhibited high-heat environments.
How does the 10ms write cycle time of the AT29C512-90JC affect real-time data logging reliability in embedded systems?
The 10ms write cycle time of the AT29C512-90JC introduces critical latency during byte- or page-program operations, meaning the device becomes unresponsive for the duration. In real-time data logging systems, this can lead to missed data if writes are not buffered or interleaved properly. Use hardware flow control or software polling of the toggle bit (DQ7) to detect completion and avoid overwriting. For improved reliability, implement a dual-buffering scheme with another memory device or on-chip SRAM to continue logging during programming cycles. Consider upgrading to faster-write flash solutions like the Macronix MX29LV400C (70µs typical) if latency is a bottleneck.
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.
AT29C512-90JC CAD Models
Microchip Technology AT29C512-90JC PCB symbols & footprints
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