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AT28C16-15SC
Microchip Technology
IC EEPROM 16KBIT PARALLEL 24SOIC
3980 Pcs New Original In Stock
EEPROM Memory IC 16Kbit Parallel 150 ns 24-SOIC
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AT28C16-15SC
Product Overview
1411368
DiGi Electronics Part Number
AT28C16-15SC-DGManufacturer
Microchip Technology
AT28C16-15SC
Description
IC EEPROM 16KBIT PARALLEL 24SOICInventory
3980 Pcs New Original In Stock
EEPROM Memory IC 16Kbit Parallel 150 ns 24-SOIC
Quantity
Minimum 1
Minimum 1
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AT28C16-15SC 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
16Kbit
Memory Organization
2K x 8
Memory Interface
Parallel
Write Cycle Time - Word, Page
1ms
Access Time
150 ns
Voltage - Supply
4.5V ~ 5.5V
Operating Temperature
0°C ~ 70°C (TC)
Mounting Type
Surface Mount
Package / Case
24-SOIC (0.295", 7.50mm Width)
Supplier Device Package
24-SOIC
Base Product Number
AT28C16
Datasheet & Documents
HTML Datasheet
AT28C16-15SC-DG
Environmental & Export Classification
RoHS Status
RoHS non-compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0051
Additional Information
Standard Package
31
Reviews
5.0/5.0-(Show up to 5 Ratings)
December 02, 2025
Affordable pricing without sacrificing quality—DiGi Electronics stands out in the market.
December 02, 2025
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December 02, 2025
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December 02, 2025
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December 02, 2025
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Frequently Asked Questions (FAQ)
Can the AT28C16-15SC be used as a drop-in replacement for the 28C16 in legacy systems, and what voltage compatibility issues should I watch for?
The AT28C16-15SC can generally serve as a functional replacement for older 28C16 EEPROMs in legacy designs, but careful verification is required. While both are 16Kbit parallel EEPROMs, the AT28C16-15SC specifies a tighter supply voltage range of 4.5V–5.5V, which may cause instability if the host system operates near 4.5V under load. Additionally, verify timing compatibility—older controllers expecting longer access times may work reliably, but faster systems relying on shorter cycles could misread data. Always confirm read/write control signal timing (especially CE, OE, and WE) against your microcontroller or logic interface. Given that the AT28C16-15SC is obsolete, consider stocking spares or evaluating modern SPI EEPROM alternatives with level-shifting if redesigning.
How does the 1ms write cycle time of the AT28C16-15SC impact real-time data logging applications, and what design techniques minimize data loss risk?
The 1ms write cycle time of the AT28C16-15SC means that after initiating a write, the device becomes unresponsive for up to 1ms, during which any new access will fail unless polling is implemented. In real-time data logging, this creates a bottleneck. To mitigate data loss, buffer incoming data in volatile memory (e.g., SRAM or MCU registers) and implement write arbitration that checks the AT28C16-15SC's read/write status via toggle bits before issuing new commands. Avoid burst writes without delay; instead, stagger write operations and incorporate timeout safeguards. For high-frequency logging, consider adding a backup power source to complete writes safely during unexpected power loss, as the AT28C16-15SC lacks internal power-fail protection.
What are the reliability risks of using AT28C16-15SC in industrial environments near the 70°C operating limit, and how does temperature affect endurance?
The AT28C16-15SC is rated for 0°C to 70°C (Tc), and operating near the upper limit increases the risk of data corruption and reduces write endurance. At elevated temperatures, the charge retention mechanism in EEPROM cells degrades faster, potentially shortening the retention period below the typical 10-year spec. Additionally, repeated write cycles at high ambient temperatures accelerate wear-out. To ensure reliability, derate the operating temperature by at least 10°C in enclosed or convection-limited systems. Monitor board temperature near the AT28C16-15SC under full load and consider adding thermal vias or local airflow. For industrial environments exceeding 70°C, evaluate high-temperature serial EEPROMs or battery-backed SRAM, as the AT28C16-15SC lacks extended temp variants.
Is the AT28C16-15SC suitable for use in new designs given its obsolete status, and what are the supply chain risks?
While the AT28C16-15SC is still available in limited original stock, its obsolete status poses significant supply chain risks for new designs. Component availability is unpredictable, and lifecycle support from Microchip has ended, increasing the likelihood of counterfeit parts in the distribution chain. If used, source only from authorized suppliers with certified traceability. Long-term, consider migrating to modern alternatives like the Microchip 25LC256 (SPI 32Kbit EEPROM), which offers better availability, smaller packages, and lower power—albeit with a serial interface. For pin-compatible parallel EEPROMs, no direct replacement exists, so redesign may be necessary. Always perform last-time-buy planning if committed to the AT28C16-15SC.
How does the RoHS non-compliance of the AT28C16-15SC affect export or compliance in modern PCB designs, and what are the alternatives for lead-free assembly?
The AT28C16-15SC is labeled as RoHS non-compliant, meaning it contains restricted substances like lead in its 24-SOIC package, which violates EU RoHS, China RoHS, and other global environmental regulations. Using it in commercial products may block market access or require special exemptions. For lead-free assembly, avoid mixing RoHS-compliant and non-compliant parts to prevent reliability issues from mixed reflow profiles. If redesign is possible, replace the AT28C16-15SC with a modern, RoHS-compliant serial EEPROM such as the AT24C256C-SSHM-T (24-pin SOIC) with an adapter in firmware. For drop-in compliance, no direct RoHS-compliant parallel 16Kbit 24-SOIC variant exists, making the AT28C16-15SC unsuitable for new environmentally certified designs.
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AT28C16-15SC CAD Models
Microchip Technology AT28C16-15SC PCB symbols & footprints
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