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Microchip Technology AT27LV512A-90TU
- Part No.:
- AT27LV512A-90TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT27LV512A-90TU.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,743
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Product details
Overview
AT27LV512A-90TU from Atmel is a 64K × 8-bit one-time programmable (OTP) EPROM optimized for low-voltage battery-powered systems, featuring 90 ns read access time, dual 3.0–3.6V or 4.5–5.5V supply operation, and industrial temperature range (−40°C to +85°C). It delivers TTL-compatible outputs at 3.0V and supports rapid programming at 100 µs/byte.
For engineers reviewing the AT27LV512A-90TU datasheet, AT27LV512A-90TU pinout, AT27LV512A-90TU application, or AT27LV512A-90TU equivalent, key selection criteria include its JEDEC-standard 28-lead TSOP package, 20 µA max standby current at 3.6V, CMOS/TTL I/O compatibility, integrated product identification code, and dual-supply interoperability in mixed-voltage embedded systems.
Technical Context
The AT27LV512A-90TU implements a standard OTP EPROM architecture with two-line control (CE and OE/VPP), enabling bus contention avoidance in multi-device memory subsystems. Its address decoding covers A0–A15 (64K locations), and output drivers support both CMOS and TTL logic levels across supply ranges.
Programming uses a 100 µs CE pulse width at VCC = 6.5V and OE/VPP = 13.0V, with built-in verification loops per byte. The integrated product identification code (Manufacturer ID: 0x1E, Device ID: 0x0D) ensures algorithm-matched programming via industry-standard equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288-bit (64K × 8) OTP EPROM - fixed, non-erasable storage for firmware boot code or configuration data. |
| Read Access Time | 90 ns max at VCC = 3.0–3.6V - enables direct interface with 10 MHz microcontrollers without wait states. |
| Supply Voltage Range | 3.0–3.6V or 4.5–5.5V - supports dual-supply system designs and hot-plug compatibility between 3.3V and 5V hosts. |
| Standby Current | 20 µA max at VCC = 3.6V - reduces power consumption in portable devices during idle periods. |
| Active Power Dissipation | 29 mW max at 5 MHz and VCC = 3.6V - lowers thermal load and extends battery life vs. legacy 5V EPROMs. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded applications including motor control and instrumentation. |
| ESD Protection | 2,000V HBM - improves robustness during board handling and in-circuit programming. |
Pinout & Package
AT27LV512A-90TU is supplied in a 28-lead Thin Small Outline Package (TSOP, Type 1), JEDEC MO-183 compliant, with 8 mm × 13.4 mm footprint and 0.55 mm lead pitch. Pin 1 is marked by a beveled corner; pins 1–14 and 15–28 are on opposing long edges.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; selects one of 64K bytes during read or program cycles. |
| O0–O7 | Data Outputs | 8-bit bidirectional data path in read mode; high-impedance when CE or OE/VPP is inactive. |
| CE | Chip Enable | Active-low global enable; controls device activation and entry into standby mode when high. |
| OE/VPP | Output Enable / Programming Supply | Active-low output gate in read mode; supplies 13.0V programming voltage during rapid programming. |
| VCC | Power Supply | Primary supply input (3.0–3.6V or 4.5–5.5V); must be applied before/with OE/VPP per system design guidelines. |
| GND | Ground Reference | Signal and power return; requires local 0.1 µF ceramic decoupling capacitor per device. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - cuts firmware update duration and increases production throughput. |
| Integrated Product Identification Code | Manufacturer ID 0x1E and Device ID 0x0D - enables automatic algorithm selection in universal programmers, eliminating manual setup errors. |
| Dual-Voltage Read Operation | Functional at 3.0–3.6V or 4.5–5.5V - allows reuse across 3.3V and 5V platforms without redesigning level-shifting circuitry. |
| TTL-Compatible Outputs at 3.0V | VOH ≥ 2.4V and VOL ≤ 0.4V driving 2.0 mA - eliminates external buffers when interfacing with legacy 5V logic in mixed-supply systems. |
| JEDEC-Standard Packaging | 28-lead TSOP (Type 1) - ensures mechanical and solder-reflow compatibility with existing SMT assembly lines and rework processes. |
Applications
| Industrial Control Firmware Storage | Portable Instrument Boot Memory |
|---|---|
Use Scenario: Storing immutable boot firmware and calibration tables in PLC modules operating in harsh factory environments. IC Role / Device Role / Timing Role: OTP EPROM providing nonvolatile instruction storage with guaranteed data retention over 10 years and immunity to accidental overwrite. Use Value: Eliminates need for external write-protection circuitry while maintaining compatibility with legacy 5V microcontroller buses via TTL-level outputs at 3.0V. | Use Scenario: Holding initialization code and sensor configuration data in handheld multimeters and data loggers powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-voltage memory enabling direct connection to 3.3V microcontrollers without regulators or level shifters. Use Value: 20 µA max standby current extends battery life beyond 12 months in sleep mode, and 90 ns access supports real-time startup response. |
| Legacy System Upgrade Memory | Embedded Card-Based Module |
Use Scenario: Replacing obsolete 5V-only EPROMs (e.g., AT27C512R) in field-deployed telecom line cards requiring backward compatibility. IC Role / Device Role / Timing Role: Pin- and function-compatible drop-in replacement supporting identical programming equipment and timing waveforms. Use Value: Enables cost-effective obsolescence mitigation without PCB revision - same 28-lead SOIC/TSOP footprints and JEDEC-standard control protocol. | Use Scenario: Providing fixed configuration storage in PCIe add-in cards designed for insertion into both 3.3V and 5V host slots. IC Role / Device Role / Timing Role: Dual-supply OTP memory ensuring reliable operation regardless of host slot voltage. Use Value: Single BOM item serves multiple host platforms; no voltage translation required due to native TTL output compliance at 3.0V and full 5V read functionality. |
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 | 5V-only operation (4.5–5.5V), no low-voltage mode; same 90 ns speed and 28-lead TSOP package. | Requires dedicated 5V rail; unsuitable for battery-powered or mixed-supply systems. | Select when legacy 5V-only infrastructure exists and dual-voltage capability is unnecessary. |
| MX29LV512CTI-90G | 3.0–3.6V only, sector-erasable flash (not OTP), 100K write/erase cycles; different command set and timing. | Supports field firmware updates; incompatible with EPROM programmers and rapid programming algorithm. | Select when reprogrammability is required and system can accommodate flash-specific control logic and erase delays. |
Compared with AT27C512R-90JU, the AT27LV512A-90TU adds 3.3V operation and lower standby power but retains identical pinout and programming compatibility; versus MX29LV512CTI-90G, it trades reprogrammability for simpler interface, deterministic timing, and guaranteed one-time write integrity - critical for safety-critical boot code.
Availability
AT27LV512A-90TU is available at Aetrix Electronics and suitable for industrial control firmware storage, portable instrument boot memory, and legacy system upgrade memory requiring stable component supply and long-term lifecycle support.
Supply support for AT27LV512A-90TU 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) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV512A belongs to Atmel's low-voltage OTP EPROM product line, engineered to replace legacy 5V EPROMs in battery-operated and mixed-voltage embedded systems while maintaining JEDEC compatibility and programming ecosystem alignment.
FAQ
What is the maximum standby current specification for the AT27LV512A-90TU?
The AT27LV512A-90TU has a maximum standby current of 20 µA at VCC = 3.6V under CMOS-level CE conditions (ISB1), with typical consumption below 1 µA. This ultra-low quiescent draw makes the AT27LV512A-90TU ideal for battery-backed systems where power budget constraints demand minimal leakage during idle states.
Can the AT27LV512A-90TU operate reliably at 3.0V supply voltage?
Yes, the AT27LV512A-90TU is fully specified for operation at 3.0V to 3.6V, delivering 90 ns read access time and TTL-compatible outputs even at the minimum 3.0V supply. Its design ensures stable performance across the entire low-voltage range, making the AT27LV512A-90TU suitable for direct integration into 3.3V systems without level shifting.
Is the AT27LV512A-90TU pin-compatible with the AT27C512R series?
Yes, the AT27LV512A-90TU shares identical pinouts, signal definitions, and timing parameters with the AT27C512R family in all supported packages (PLCC, SOIC, TSOP). It is explicitly documented as JEDEC-compatible and uses the same programming equipment - confirming that the AT27LV512A-90TU functions as a drop-in replacement in existing AT27C512R designs.
What programming voltage is required for the AT27LV512A-90TU?
The AT27LV512A-90TU requires OE/VPP = 13.0 ± 0.25V and VCC = 6.5 ± 0.25V during programming, with a 100 µs CE pulse width. These voltages are applied simultaneously per the Rapid Programming Algorithm, and the AT27LV512A-90TU's integrated product identification code ensures correct algorithm selection in compatible programmers.
Does the AT27LV512A-90TU support industrial temperature operation?
Yes, the AT27LV512A-90TU is rated for industrial temperature operation from −40°C to +85°C, as confirmed by its ordering code suffix "TU" (TSOP, Industrial) and AC/DC specifications tested across this full range. This qualification ensures reliable performance in demanding environments such as factory automation and outdoor instrumentation where the AT27LV512A-90TU is commonly deployed.
AT27LV512A-90TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- 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-TSOP
AT27LV512A-90TU FAQ
1.How can I place an order for AT27LV512A-90TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-90TU 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-90TU reliable?
The price and inventory of AT27LV512A-90TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-90TU is usually 5 days.
3.What payment methods are accepted for AT27LV512A-90TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-90TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-90TU?
AT27LV512A-90TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-90TU 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-90TU?
For technical support, including AT27LV512A-90TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-90TU requirements.
6.How does Aetrix verify that AT27LV512A-90TU is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-90TU 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-90TU meets industry standards.
7.What is the process for return or replacement of AT27LV512A-90TU?
All AT27LV512A-90TU units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-90TU, 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-90TU part is unused and in its original packaging.
Return procedure for AT27LV512A-90TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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