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Microchip Technology AT27LV512A-90JI
- Part No.:
- AT27LV512A-90JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV512A-90JI.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,662
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Product details
Overview
AT27LV512A-90JI from Atmel is a 64K × 8-bit one-time programmable EPROM (OTP EPROM) operating at 3.0–3.6 V or 4.5–5.5 V, with 90 ns read access time, 20 µA max standby current at 3.6 V, and JEDEC-standard 32-lead PLCC packaging. It serves as non-volatile program storage in battery-powered portable systems requiring low-voltage compatibility and TTL-level output interoperability.
For engineers reviewing the AT27LV512A-90JI datasheet, AT27LV512A-90JI pinout, AT27LV512A-90JI application, or AT27LV512A-90JI equivalent, key selection considerations include dual-voltage operation (3.3 V/5 V), rapid programming (100 µs/byte), JEDEC-compatibility with AT27C512R, industrial temperature range (−40°C to +85°C), and PLCC package mechanical footprint.
Technical Context
The AT27LV512A-90JI implements a CMOS OTP EPROM architecture with two-line control (CE/OE/VPP), supporting both read and rapid programming modes via dedicated OE/VPP pin. Its address decoding covers A0–A15 (16-bit), enabling full 64K-byte access without external latching.
It features integrated product identification (Manufacturer ID = 0x1E, Device ID = 0x0D), ESD protection ≥2,000 V, latchup immunity ≥200 mA, and supports TTL-compatible I/O levels even when powered at 3.3 V - ensuring interoperability with legacy 5 V logic buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8), sufficient for firmware boot code or configuration tables in embedded controllers |
| Read Access Time | 90 ns max at VCC = 3.0–3.6 V or 4.5–5.5 V - enables direct interface with 10 MHz microcontrollers without wait states |
| Supply Voltage Range | 3.0–3.6 V (low-power mode) or 4.5–5.5 V (5 V system compatibility) - supports dual-supply host designs |
| Standby Current | 20 µA max at VCC = 3.6 V - critical for battery life in portable instrumentation and handheld devices |
| Programming Speed | 100 µs/byte typical using Rapid™ algorithm - reduces production programming cycle time vs. legacy EPROMs |
| Operating Temperature | −40°C to +85°C (industrial grade) - qualified for automotive body electronics and industrial PLC modules |
| Package | 32-lead PLCC (JEDEC MS-016 AE) - surface-mount compatible with standard reflow profiles and socket-based programming |
Pinout & Package
AT27LV512A-90JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) per JEDEC MS-016 AE. Pins 1 and 17 are No Connect (NC). The package is lead-free compatible and rated for industrial temperature operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; fully decoded internally to select one of 64K bytes |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus outputs; TTL-compatible even at 3.3 V supply |
| CE | Chip Enable | Active-low chip select; controls device activation and bus contention prevention |
| OE/VPP | Output Enable / Programming Supply | Dual-function pin: OE during read; 13.0 V VPP source during programming |
| VCC | Power Supply | Primary power input; must be applied before/with OE/VPP to prevent latchup |
| GND | Ground | Reference return path for all signals and power; requires local 0.1 µF ceramic decoupling |
| NC (Pins 1, 17) | No Connect | Unbonded pins; must remain unconnected on PCB to avoid reliability risk |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Operation | Operates natively at 3.3 V (enabling battery-powered portables) while maintaining full TTL output compatibility with 5 V systems |
| Rapid™ Programming Algorithm | Reduces production programming time to ~100 µs/byte with built-in verify-reprogram loop, improving yield and throughput |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x0D) enable automatic algorithm selection in industry-standard programmers |
| JEDEC Standard Compatibility | Pin- and function-compatible with AT27C512R, allowing reuse of existing programming hardware and firmware tools |
| High-Reliability Process | 2,000 V HBM ESD rating and 200 mA latchup immunity ensure robustness in manufacturing and field environments |
Applications
| Industrial Control Firmware Storage | Portable Medical Device Boot ROM |
|---|---|
Use Scenario: Storing fixed firmware for programmable logic controllers (PLCs) deployed in factory automation cabinets with wide ambient temperature swings. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic startup sequence and configuration data at power-on reset. Use Value: Industrial temperature rating (−40°C to +85°C) and 20 µA standby current ensure reliable long-term operation without thermal derating or battery drain. |
Use Scenario: Holding calibration constants and safety-critical boot code in handheld glucose meters and pulse oximeters powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-voltage OTP EPROM delivering verified firmware integrity without volatile RAM refresh overhead. Use Value: 3.0–3.6 V operation extends battery life; 90 ns access time meets real-time sensor sampling deadlines without CPU wait states. |
| Legacy System 5 V/3.3 V Hybrid Interface | Embedded Test Equipment Configuration Memory |
Use Scenario: Enabling plug-and-play compatibility of add-in cards across both 5 V ISA backplanes and modern 3.3 V carrier boards in test instrumentation racks. IC Role / Device Role / Timing Role: Dual-supply OTP memory acting as bridge between legacy and next-gen host interfaces. Use Value: Simultaneous 3.3 V/5 V tolerance and TTL-level outputs eliminate level-shifter components and reduce BOM count. |
Use Scenario: Storing instrument-specific calibration coefficients, serial numbers, and self-test vectors in automated test equipment (ATE) modules. IC Role / Device Role / Timing Role: One-time programmable storage for immutable configuration data accessed during power-up diagnostics. Use Value: Rapid programming (100 µs/byte) accelerates final test line throughput; PLCC package allows socket-based reprogramming pre-deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C512R-90JC | 5 V-only operation (4.5–5.5 V); no low-voltage mode; identical 90 ns speed and PLCC package | Limited to legacy 5 V systems; cannot replace AT27LV512A-90JI in 3.3 V or dual-supply designs | Select only if board is exclusively 5 V and requires drop-in replacement without voltage rail changes |
| MX29LV512CTI-90G | 3 V Flash memory (not OTP); supports erase/rewrite; 90 ns access; TSOP-32 package (not PLCC) | Enables field updates but requires different programming infrastructure and layout revision due to package mismatch | Choose for upgradability needs - not for pin-compatible OTP replacement |
Compared with AT27C512R-90JC and MX29LV512CTI-90G, the AT27LV512A-90JI uniquely combines industrial-temperature OTP functionality, dual-voltage support, and PLCC packaging - making it irreplaceable where 3.3 V operation, one-time programming assurance, and socket-based programming are mandatory design requirements.
Availability
AT27LV512A-90JI is available at Aetrix Electronics and suitable for industrial control firmware storage, portable medical device boot ROM, and legacy system 5 V/3.3 V hybrid interface applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for AT27LV512A-90JI 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, non-volatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV512A-90JI belongs to Atmel's legacy OTP EPROM product line, designed specifically for cost-sensitive, high-reliability embedded systems requiring immutable firmware storage with low-power, dual-voltage operation.
FAQ
What is the maximum operating voltage for AT27LV512A-90JI during normal read operation?
The AT27LV512A-90JI supports two distinct read voltage ranges: 3.0 V to 3.6 V for low-power operation, and 4.5 V to 5.5 V for standard 5 V system compatibility. It must not be operated outside these ranges during read mode; programming requires VCC = 6.5 V and OE/VPP = 13.0 V, per the datasheet's DC Programming Characteristics table.
Does AT27LV512A-90JI support in-system programming?
No, the AT27LV512A-90JI is a one-time programmable (OTP) EPROM and does not support in-system programming. Programming requires dedicated EPROM programmers capable of applying 13.0 V to the OE/VPP pin and 6.5 V to VCC. Once programmed, data cannot be erased or rewritten - the device is intended for final firmware image storage prior to system assembly.
What is the purpose of the OE/VPP pin on AT27LV512A-90JI?
The OE/VPP pin on AT27LV512A-90JI serves a dual function: during read operation, it acts as Output Enable (active-low); during programming, it supplies the 13.0 V VPP programming voltage. This shared pin simplifies board routing but requires strict sequencing - VCC must be applied before OE/VPP and removed after it - to prevent latchup or damage per the System Considerations section.
Is AT27LV512A-90JI pin-compatible with AT27C512R-90JC?
Yes, AT27LV512A-90JI is functionally and pin-compatible with AT27C512R-90JC in read mode and shares identical PLCC-32 pinout, address/data mapping, and control logic. However, AT27LV512A-90JI adds 3.3 V operation and requires different programming voltages - so while PCB layout is interchangeable, programming hardware must support dual-voltage mode.
What decoupling capacitance is required for stable operation of AT27LV512A-90JI?
Per the System Considerations section, each AT27LV512A-90JI requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins. For arrays of multiple devices, an additional 4.7 µF bulk electrolytic capacitor must be placed near the power entry point to stabilize the supply rail and suppress transient excursions caused by CE switching.
AT27LV512A-90JI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- 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:
- 32-PLCC (13.97x11.43)
AT27LV512A-90JI FAQ
1.How can I place an order for AT27LV512A-90JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-90JI 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-90JI reliable?
The price and inventory of AT27LV512A-90JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-90JI is usually 5 days.
3.What payment methods are accepted for AT27LV512A-90JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-90JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-90JI?
AT27LV512A-90JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-90JI 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-90JI?
For technical support, including AT27LV512A-90JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-90JI requirements.
6.How does Aetrix verify that AT27LV512A-90JI is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-90JI 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-90JI meets industry standards.
7.What is the process for return or replacement of AT27LV512A-90JI?
All AT27LV512A-90JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-90JI, 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-90JI part is unused and in its original packaging.
Return procedure for AT27LV512A-90JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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