Counterfeit and defect prevention
Visual and packaging inspection
Electrical performance verification
Service Email:
[email protected]
>
AT27BV512-70TU
Microchip Technology
IC EPROM 512KBIT PARALLEL 28TSOP
2763 Pcs New Original In Stock
EPROM - OTP Memory IC 512Kbit Parallel 70 ns 28-TSOP
Request Quote
(Ships tomorrow)
*Quantity
Minimum 1
Minimum 1
5.0 / 5.0
- (432 Ratings)
AT27BV512-70TU
Product Overview
1263760
DiGi Electronics Part Number
AT27BV512-70TU-DGManufacturer
Microchip Technology
AT27BV512-70TU
Description
IC EPROM 512KBIT PARALLEL 28TSOPInventory
2763 Pcs New Original In Stock
EPROM - OTP Memory IC 512Kbit Parallel 70 ns 28-TSOP
CAD Models - PCB Symbols & Footprints
Quantity
Minimum 1
Minimum 1
Purchase and inquiry
Warranty & Returns
How to Order
Shipping & Delivery
Quality Assurance
365 - Day Quality Guarantee - Every part fully backed.
90 - Day Refund or Exchange - Defective parts? No hassle.
Limited Stock, Order Now - Get reliable parts without worry.
Global Shipping & Secure Packaging
Worldwide Delivery in 3-5 Business Days
100% ESD Anti-Static Packaging
Real-Time Tracking for Every Order
Secure & Flexible Payment
Credit Card, VISA, MasterCard, PayPal, Western Union, Telegraphic Transfer(T/T) and more
All payments encrypted for security
AT27BV512-70TU Technical Specifications
Category
Memory, Memory
Packaging
-
Series
-
Product Status
Obsolete
DiGi-Electronics Programmable
Not Verified
Memory Type
Non-Volatile
Memory Format
EPROM
Technology
EPROM - OTP
Memory Size
512Kbit
Memory Organization
64K x 8
Memory Interface
Parallel
Write Cycle Time - Word, Page
-
Access Time
70 ns
Voltage - Supply
2.7V ~ 3.6V, 4.5V ~ 5.5V
Operating Temperature
-40°C ~ 85°C (TC)
Mounting Type
Surface Mount
Package / Case
28-TSSOP (0.465", 11.80mm Width)
Supplier Device Package
28-TSOP
Base Product Number
AT27BV512
Datasheet & Documents
HTML Datasheet
AT27BV512-70TU-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
3 (168 Hours)
REACH Status
REACH Unaffected
ECCN
3A991B1B2
HTSUS
8542.32.0061
Additional Information
Standard Package
234
Reviews
5.0/5.0-(Show up to 5 Ratings)
Dec 02, 2025
Les produits sont constants en qualité, et le service après-vente est à la hauteur.
Dec 02, 2025
Superschnelle Lieferung in nachhaltiger Verpackung. Ein Einkaufserlebnis, das begeistert.
Dec 02, 2025
Every interaction with their customer care team leaves me feeling valued and respected.
Dec 02, 2025
Exceptional value paired with dependable packaging sets DiGi Electronics apart.
Publish Evalution
Evalution Message
Please enter your review message.
Please post honest comments and do not post ilegal comments.
Frequently Asked Questions (FAQ)
Can the AT27BV512-70TU be used as a drop-in replacement for the obsolete AT27C512R-70JC in a legacy industrial control design, and what voltage compatibility risks should I mitigate?
The AT27BV512-70TU can serve as a functional replacement for the AT27C512R-70JC in many cases, but careful evaluation is required due to voltage differences. The AT27BV512-70TU operates at dual voltage ranges: 2.7V–3.6V and 4.5V–5.5V, whereas the AT27C512R-70JC is strictly 5V-tolerant. If your system runs at 5V, ensure the AT27BV512-70TU is powered within its 4.5V–5.5V range. However, note that outputs from the AT27BV512-70TU may have slightly different drive characteristics, so verify signal integrity on shared bus lines. Additionally, confirm timing compatibility—while both have 70 ns access time, loading and capacitance effects may differ in your PCB layout. Always test in-circuit under worst-case temperature and voltage conditions to avoid intermittent failures in long-term deployment.
What are the key design-in risks when selecting the AT27BV512-70TU for a new product, given its obsolete status from Microchip Technology?
Using the AT27BV512-70TU in a new design carries significant supply chain and lifecycle risks due to its obsolete status. Although 2,696 units are available from excess stock, future availability is not guaranteed, which jeopardizes long-term production and repair cycles. Designing with an obsolete EPROM like the AT27BV512-70TU may lead to obsolescence management costs or forced redesigns in 3–5 years. Consider implementing lifecycle risk mitigation: secure multi-year stockpiles, evaluate drop-in replacements like the SST39SF040-70-4I-S2K (which is in production and offers similar 512Kbit parallel interface), or redesign with modern SPI NOR flash and a parallel-to-SPI bridge if board space allows. Document sourcing strategies early in the BOM review process.
How does the dual-voltage support of the AT27BV512-70TU impact power supply design in battery-powered embedded systems?
The dual-voltage capability of the AT27BV512-70TU (2.7V–3.6V and 4.5V–5.5V) offers flexibility but complicates power supply design in battery-powered systems. If using 3.3V logic rails, ensure stable voltage regulation above 2.7V throughout the battery discharge curve to prevent read errors or timing violations. Avoid transitional voltages (e.g., 3.6V to 4.5V) where the device is not guaranteed to operate. Use a discrete voltage supervisor or MCU-controlled power sequencing to guarantee the AT27BV512-70TU powers up within a valid range. Also, monitor current draw during read cycles—though low, cumulative power in always-on applications may drain batteries faster than modern low-standby micro-power flash alternatives.
What PCB layout and moisture sensitivity precautions are critical when assembling the AT27BV512-70TU in a high-reliability environment?
When assembling the AT27BV512-70TU in high-reliability applications, observe MSL3 (168-hour floor life) handling protocols to prevent popcorning during reflow. Store in dry packaging with desiccant and humidity indicator cards; bake at 125°C for 24 hours if exposure exceeds floor life. For PCB layout, minimize trace lengths on address and data lines to reduce capacitive loading and preserve the 70 ns access time. Use ground planes to reduce noise coupling, especially critical in parallel bus configurations. Due to the 28-TSOP package’s fine pitch, ensure precise stencil design and IPC-compliant reflow profiles to avoid solder bridging. Inspect with X-ray or AOI post-assembly to verify joint integrity in mission-critical systems.
How does the OTP (One-Time Programmable) nature of the AT27BV512-70TU affect field service and design validation compared to modern reprogrammable flash memory?
The OTP design of the AT27BV512-70TU eliminates field reprogramming, which introduces high risk in prototyping and field service. Firmware errors or updates require physical replacement of the chip, increasing downtime and logistics complexity. During design validation, use verified, version-controlled programming files and conduct extensive pre-programming testing in simulation or FPGA emulation. Program only after final design freeze. In contrast, modern alternatives like the MX29LV512MCTI-70G (512Kbit, 70 ns, reprogrammable NOR flash) offer in-circuit reprogramming and sector erase—significantly improving design flexibility. For new designs, strongly consider migrating to reprogrammable options unless regulatory or hardware heritage requirements mandate OTP use with the AT27BV512-70TU.
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.
AT27BV512-70TU CAD Models
Microchip Technology AT27BV512-70TU PCB symbols & footprints
productDetail
