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Microchip Technology AT27LV512A-90RU
- Part No.:
- AT27LV512A-90RU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-SOIC (0.342", 8.69mm Width)
- Datasheet:
-
AT27LV512A-90RU.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,930
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Product details
Overview
AT27LV512A-90RU from Atmel is a 64K × 8-bit one-time programmable EPROM with 90 ns read access time, dual-voltage operation (3.0–3.6 V or 4.5–5.5 V), and industrial temperature range (−40°C to +85°C). It delivers TTL-compatible outputs at 3.0 V, supports rapid programming at 100 µs/byte, and features JEDEC-standard 28-lead SOIC packaging for embedded boot memory in portable battery-powered systems.
For engineers reviewing the AT27LV512A-90RU datasheet, AT27LV512A-90RU pinout, AT27LV512A-90RU application, or AT27LV512A-90RU equivalent, key selection criteria include low-voltage standby current (<1 µA typical), 3.0 V TTL-level output compatibility, JEDEC-compliant SOIC footprint, and OTP reliability for firmware storage in legacy industrial controllers and card-edge systems.
Technical Context
The AT27LV512A-90RU implements a CMOS-based OTP EPROM architecture with two-line control (CE and OE/VPP) enabling bus contention prevention in shared-memory systems. Its dual-supply design allows seamless integration into mixed-voltage platforms-operating at 3.0–3.6 V for low-power portables or 4.5–5.5 V for legacy 5 V host compatibility.
It uses a Rapid Programming Algorithm requiring VCC = 6.5 V and OE/VPP = 13.0 V, with verified 100 µs CE pulse width per byte and up to 10 reprogramming attempts on verification failure. The integrated Product Identification Code (Manufacturer ID: 0x1E, Device ID: 0x0D) ensures algorithm auto-selection in industry-standard programmers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64K × 8-bit (524,288 bits), fixed OTP configuration for immutable firmware storage |
| Read Access Time | 90 ns max at VCC = 3.0–3.6 V, enabling real-time boot code fetch in microcontroller systems |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - supports dual-rail system interoperability without level shifters |
| Standby Current | <1 µA typical at 3.3 V, critical for battery-backed applications with extended sleep cycles |
| Active Power Dissipation | 29 mW max at 5 MHz and VCC = 3.6 V, reducing thermal load in dense PCB layouts |
| Operating Temperature | −40°C to +85°C industrial grade, validated for deployment in factory automation hardware |
| ESD Protection | 2,000 V HBM, ensuring robustness during manual handling and board assembly |
Pinout & Package
AT27LV512A-90RU is supplied in a 28-lead SOIC package (package code 28R), 0.330" wide, with gull-wing leads. Pin 1 identifier located at top-left corner; no internal tie to pins 1 or 17 (not applicable in SOIC).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; fully decoded to select one of 64K bytes |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus outputs; TTL-compatible at 3.0 V, drive ±2.0 mA |
| CE | Chip Enable | Active-low enable controlling device activation; used with OE/VPP to prevent bus contention |
| OE/VPP | Output Enable / Program Supply | Dual-function pin: OE during read, VPP = 13.0 V during programming |
| VCC | Power Supply | Single supply input supporting both 3.3 V and 5 V operation; requires local 0.1 µF ceramic decoupling |
| GND | Ground Reference | Common return path for all logic and power domains; must be low-inductance connection |
Key Features
| Feature | Design Value |
|---|---|
| Rapid Programming Algorithm | 100 µs/byte typical programming time with automatic verify-and-reprogram loop up to 10 pulses |
| Integrated Product ID Code | Manufacturer ID 0x1E and Device ID 0x0D electrically readable for programmer auto-detection |
| Two-Line Control Architecture | Independent CE and OE/VPP inputs eliminate bus contention in multi-device memory maps |
| TTL-Compatible Outputs at 3.0 V | VOH ≥ 2.4 V and VOL ≤ 0.4 V at IOL = 2.0 mA, enabling direct interfacing with 5 V logic |
| Green Packaging Option | Pb/halide-free SOIC construction compliant with RoHS Directive 2011/65/EU |
Applications
| Industrial PLC Firmware Storage | Legacy Card-Edge Boot Memory |
|---|---|
Use Scenario: Storing immutable boot firmware in programmable logic controller mainboards operating in harsh factory environments. IC Role / Device Role / Timing Role: OTP EPROM providing nonvolatile instruction memory mapped to CPU address space during cold start. Use Value: −40°C to +85°C rating and 2,000 V ESD protection ensure reliable operation across thermal cycling and electrostatic events. | Use Scenario: Embedded boot ROM in ISA or PC/104 expansion cards designed for pluggable operation in both 3 V and 5 V host slots. IC Role / Device Role / Timing Role: Dual-voltage OTP memory delivering TTL-level outputs at 3.0 V while accepting standard 5 V programming equipment. Use Value: JEDEC-compliant SOIC footprint and identical programming algorithm to AT27C512R simplify legacy design migration. |
| Portable Medical Diagnostic Device | Avionics Maintenance Terminal |
Use Scenario: Holding calibration tables and safety-critical startup routines in handheld diagnostic tools powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-power OTP memory enabling sub-µA standby current to extend battery life between sessions. Use Value: 3.0 V operation with <1 µA typical ISB eliminates need for auxiliary LDOs in compact battery-powered enclosures. | Use Scenario: Storing aircraft maintenance software updates in ground-support terminals requiring long-term data integrity and field-programmability. IC Role / Device Role / Timing Role: One-time programmable memory with rapid 100 µs/byte write cycle for secure field updates via certified programming stations. Use Value: Integrated product ID code ensures correct algorithm selection and prevents misprogramming in safety-critical avionics workflows. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C512R-90JU | 5 V-only operation (4.5–5.5 V); no low-voltage mode; same 90 ns tACC and 28-lead SOIC package | Requires dedicated 5 V rail; unsuitable for battery-powered or mixed-voltage systems | Select when legacy 5 V infrastructure prohibits voltage scaling and JEDEC SOIC footprint is mandatory |
| MX29LV512CTI-90G | 3 V flash memory (not OTP); supports erase/rewrite; 90 ns access; 28-pin TSOP package | Field-upgradable firmware; higher endurance but lower data retention vs. OTP EPROM | Select when firmware revision capability is required and TSOP layout is acceptable |
Compared with AT27C512R-90JU, the AT27LV512A-90RU adds 3.0–3.6 V operation and sub-µA standby, enabling portable use; compared with MX29LV512CTI-90G, it trades rewrite flexibility for superior data retention and simpler programming infrastructure.
Availability
AT27LV512A-90RU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy card-edge boot memory, and portable medical diagnostic devices requiring stable component supply and long-lifecycle support.
Supply support for AT27LV512A-90RU includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Atmel Corporation, now part of Microchip Technology, was a leading designer of nonvolatile memory and microcontroller solutions, known for high-reliability OTP EPROMs and Flash products targeting industrial and automotive markets.
The AT27LV512A product line delivers low-voltage, JEDEC-compliant OTP EPROMs optimized for firmware storage in battery-powered and mixed-voltage embedded systems where data immutability and long-term retention are critical.
FAQ
What is the maximum read access time specification for AT27LV512A-90RU?
The AT27LV512A-90RU has a guaranteed maximum read access time of 90 ns under industrial conditions (−40°C to +85°C) with VCC = 3.0–3.6 V or 4.5–5.5 V. This value is measured from address valid or CE/OE assertion to valid data output, and applies to both voltage ranges per the official Atmel datasheet revision 0607F.
Does AT27LV512A-90RU support true 3.3 V TTL-compatible outputs?
Yes, the AT27LV512A-90RU produces TTL-compatible outputs at VCC = 3.0 V, with VOH ≥ 2.4 V and VOL ≤ 0.4 V under specified load conditions (IOH = −2.0 mA, IOL = 2.0 mA). This enables direct interfacing with standard 5 V TTL logic without level-shifting circuitry, as confirmed in the DC characteristics table of the AT27LV512A-90RU datasheet.
What package type does AT27LV512A-90RU use, and is it lead-free?
The AT27LV512A-90RU uses a 28-lead SOIC package (code 28R), 0.330" wide, and is supplied in the green (Pb/halide-free) variant per ordering code suffix "U". This complies with RoHS Directive 2011/65/EU and eliminates lead-based solder concerns in modern assembly processes.
Can AT27LV512A-90RU be programmed using standard AT27C512R equipment?
Yes, the AT27LV512A-90RU programs identically to the AT27C512R using the same programming equipment and algorithms. Both share the same Product Identification Code (0x1E/0x0D), and the AT27LV512A-90RU accepts VCC = 6.5 V and OE/VPP = 13.0 V during programming, matching AT27C512R requirements per the datasheet's Programming Characteristics section.
What is the standby current specification for AT27LV512A-90RU at 3.3 V?
The AT27LV512A-90RU specifies a maximum standby current (ISB1) of 20 µA at VCC = 3.6 V with CE = VCC ± 0.3 V, and typical standby current is less than 1 µA at 3.3 V. This ultra-low quiescent draw is validated across the industrial temperature range and is critical for battery-operated applications requiring multi-year shelf life.
AT27LV512A-90RU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-SOIC (0.342", 8.69mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EPROM
- Technology:
- EPROM - OTP
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- -
- Access Time:
- 90 ns
- Voltage - Supply:
- 3V ~ 3.6V, 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-SOIC
AT27LV512A-90RU FAQ
1.How can I place an order for AT27LV512A-90RU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-90RU on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for AT27LV512A-90RU reliable?
The price and inventory of AT27LV512A-90RU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-90RU is usually 5 days.
3.What payment methods are accepted for AT27LV512A-90RU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-90RU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-90RU?
AT27LV512A-90RU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-90RU order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for AT27LV512A-90RU?
For technical support, including AT27LV512A-90RU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-90RU requirements.
6.How does Aetrix verify that AT27LV512A-90RU is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-90RU products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that AT27LV512A-90RU meets industry standards.
7.What is the process for return or replacement of AT27LV512A-90RU?
All AT27LV512A-90RU units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-90RU, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The AT27LV512A-90RU part is unused and in its original packaging.
Return procedure for AT27LV512A-90RU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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