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Microchip Technology AT27LV512A-90JU-T
- Part No.:
- AT27LV512A-90JU-T
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV512A-90JU-T.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,215
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Product details
Overview
AT27LV512A-90JU-T from Microchip Technology (formerly Atmel) is a 64K × 8-bit, one-time programmable EPROM optimized for low-voltage battery-powered systems. It delivers 90 ns read access at 3.0–3.6 V, supports dual supply operation (3.0–3.6 V or 4.5–5.5 V), and features CMOS/TTL-compatible I/O with industrial temperature range (−40°C to +85°C).
For engineers reviewing the AT27LV512A-90JU-T datasheet, AT27LV512A-90JU-T pinout, AT27LV512A-90JU-T application, or AT27LV512A-90JU-T equivalent, key selection criteria include its 90 ns access time at 3.3 V, <1 µA typical standby current, JEDEC-standard 32-lead PLCC package, rapid 100 µs/byte programming, and compatibility with AT27C512R programming infrastructure.
Technical Context
The AT27LV512A-90JU-T implements a single-supply OTP EPROM architecture with two-line control (CE and OE/VPP), enabling bus contention avoidance in shared-memory systems. Its dual-voltage design allows seamless integration into mixed-voltage platforms-operating at TTL-compatible output levels even when VCC = 3.0 V.
It uses high-reliability CMOS process technology with 2,000 V HBM ESD protection and 200 mA latchup immunity. The integrated product identification code (0x1E for manufacturer, 0x0D for device) ensures automatic algorithm selection in standard programming equipment, maintaining full programming equivalence with AT27C512R.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory size | 524,288 bits (64K × 8), fixed OTP configuration requiring no refresh or write-cycle management |
| Read access time | 90 ns max at VCC = 3.0–3.6 V - enables real-time boot code execution in portable embedded controllers |
| Supply voltage range | 3.0–3.6 V or 4.5–5.5 V - supports dual-voltage system interoperability without level-shifting |
| Standby current | 20 µA max (CMOS mode), <1 µA typical at 3.3 V - extends battery life in always-on memory retention applications |
| Active power dissipation | 29 mW max at 5 MHz and VCC = 3.6 V - reduces thermal load vs. legacy 5 V EPROMs by >80% |
| Operating temperature | −40°C to +85°C - qualified for industrial-grade deployment in harsh ambient environments |
| ESD/latchup rating | 2,000 V HBM ESD protection; 200 mA latchup immunity - enhances field reliability in uncontrolled handling scenarios |
Pinout & Package
AT27LV512A-90JU-T is housed in a JEDEC-standard 32-lead plastic J-leaded chip carrier (PLCC), designated as package code 32J. Dimensions conform to MS-016 variation AE, with lead coplanarity ≤ 0.10 mm and matte tin lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address inputs | 16-bit address bus supporting full 64K address space; TTL/CMOS compatible thresholds |
| O0–O7 | Data outputs | 8-bit bidirectional data bus with VOH ≥ 2.4 V at IOH = −2.0 mA (3.3 V) or −400 µA (5 V) |
| CE | Chip enable | Active-low global enable controlling device activation and standby entry; TTL/CMOS compatible |
| OE/VPP | Output enable / programming voltage | Dual-function pin: OE during read; VPP = 13.0 V during programming; requires external switching |
| VCC | Power supply | Accepts 3.0–3.6 V or 4.5–5.5 V; must be applied simultaneously with OE/VPP per AC timing rules |
| GND | Ground reference | Primary return path for all I/O and core logic; decoupling requires 0.1 µF ceramic + 4.7 µF bulk capacitor |
| NC | No connect | Pins 1, 17, and others marked NC are internally unconnected - must remain floating or grounded per layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Rapid programming algorithm | 100 µs/byte typical - reduces production programming time by >90% vs. conventional EPROMs |
| Integrated product ID code | Manufacturer ID = 0x1E, Device ID = 0x0D - enables auto-detection and algorithm selection in industry-standard programmers |
| Two-line control interface | CE + OE/VPP only - eliminates need for separate WE or output buffer control, simplifying PCB routing |
| Green packaging | Pb/halide-free PLCC (32J) - meets RoHS Directive 2011/65/EU without derating or performance compromise |
| TTL-level outputs at 3.3 V | VOH ≥ 2.4 V with IOH = −2.0 mA at VCC = 3.3 V - eliminates level shifters when interfacing with legacy 5 V logic |
Applications
| Industrial PLC Firmware Storage | Medical Diagnostic Boot ROM |
|---|---|
Use Scenario: Storing immutable firmware for programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: OTP EPROM providing nonvolatile, tamper-resistant boot code storage with guaranteed read integrity across −40°C to +85°C. Use Value: 90 ns access time ensures deterministic boot latency; <1 µA standby current minimizes auxiliary power draw during idle cycles. | Use Scenario: Holding certified diagnostic application code in portable ultrasound or ECG devices powered by rechargeable Li-ion batteries. IC Role / Device Role / Timing Role: Low-voltage OTP memory delivering reliable code fetch at 3.3 V while meeting IEC 60601-1 leakage and safety requirements. Use Value: Dual-voltage support allows reuse across both 3.3 V handheld units and 5 V benchtop variants; green packaging satisfies medical regulatory mandates. |
| Avionics Configuration Memory | Test Equipment Calibration Data |
Use Scenario: Storing flight-critical configuration tables in airborne data acquisition modules subject to DO-160 environmental stress testing. IC Role / Device Role / Timing Role: Radiation-tolerant OTP EPROM serving as static configuration store with no write endurance concerns or refresh overhead. Use Value: 2,000 V ESD rating and 200 mA latchup immunity ensure robustness against transient coupling on aircraft power buses. | Use Scenario: Retaining factory-calibrated coefficients in automated test equipment used for semiconductor wafer probing and functional validation. IC Role / Device Role / Timing Role: Immutable calibration data repository accessed during power-up initialization before measurement routines begin. Use Value: Rapid 100 µs/byte programming enables efficient post-calibration data loading; JEDEC PLCC package ensures long-term socket compatibility across equipment generations. |
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); identical pinout, timing, and programming interface | Requires dedicated 5 V rail; not suitable for battery-powered 3.3 V systems | Select when legacy 5 V infrastructure exists and low-voltage operation is unnecessary |
| MX29LV512CBTI-90G | 3 V flash memory (not OTP); supports erase/write cycles; 90 ns access; different command set and pinout | Enables field updates but requires additional control logic and wear-leveling consideration | Select when reprogrammability is required and board redesign for flash interface is acceptable |
Compared with AT27C512R-90JU and MX29LV512CBTI-90G, the AT27LV512A-90JU-T uniquely balances ultra-low-power 3.3 V operation with OTP security and zero-write-cycle complexity-making it optimal for cost-sensitive, battery-constrained, or safety-critical firmware storage where update flexibility is not required.
Availability
AT27LV512A-90JU-T is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical diagnostic boot ROM, and avionics configuration memory requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for AT27LV512A-90JU-T 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
Microchip Technology acquired Atmel in 2016 and maintains full technical and manufacturing continuity for legacy Atmel memory products including the AT27LV512A series.
The AT27LV512A product line was designed specifically for low-power, high-reliability OTP firmware storage in portable and industrial embedded systems-emphasizing fast 3.3 V access, dual-voltage interoperability, and JEDEC-standard compatibility.
FAQ
What is the maximum read access time specification for AT27LV512A-90JU-T?
The AT27LV512A-90JU-T has a guaranteed maximum read access time of 90 ns when VCC is in the 3.0–3.6 V range and operating within the industrial temperature range (−40°C to +85°C). This parameter is measured from address valid or CE/OE assertion to valid data output, per JEDEC-standard AC test conditions defined in the official datasheet.
Does AT27LV512A-90JU-T support true 3.3 V-only operation without 5 V?
Yes, AT27LV512A-90JU-T operates fully within 3.0–3.6 V for read mode, delivering TTL-compatible outputs and sub-1 µA typical standby current. It does not require a 5 V supply for functionality-though it remains backward-compatible with 5 V systems via its dual-voltage design and 4.5–5.5 V operating range.
Can AT27LV512A-90JU-T be programmed using standard AT27C512R programming equipment?
Yes, AT27LV512A-90JU-T is fully programming-compatible with AT27C512R equipment. It uses identical programming algorithms, pin assignments, and the same integrated product ID code (0x1E/0x0D), allowing existing programmers to recognize and program AT27LV512A-90JU-T without firmware or hardware modification.
What is the purpose of the OE/VPP pin on AT27LV512A-90JU-T?
The OE/VPP pin on AT27LV512A-90JU-T serves two distinct functions: during read operations, it acts as Output Enable (active-low); during programming, it becomes the 13.0 V programming voltage (VPP) input. This dual-role design maintains pin count efficiency while ensuring proper voltage isolation between read and program modes.
Is AT27LV512A-90JU-T RoHS-compliant and halogen-free?
Yes, AT27LV512A-90JU-T is supplied in a green (Pb/halide-free) 32-lead PLCC package with matte tin lead finish, compliant with EU RoHS Directive 2011/65/EU and satisfying halogen-free requirements per IEC 61249-2-21. This applies to the -JU suffix variant explicitly listed in Atmel's ordering information.
AT27LV512A-90JU-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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 (11.43x13.97)
AT27LV512A-90JU-T FAQ
1.How can I place an order for AT27LV512A-90JU-T through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-90JU-T 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-90JU-T reliable?
The price and inventory of AT27LV512A-90JU-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-90JU-T is usually 5 days.
3.What payment methods are accepted for AT27LV512A-90JU-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-90JU-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-90JU-T?
AT27LV512A-90JU-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-90JU-T 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-90JU-T?
For technical support, including AT27LV512A-90JU-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-90JU-T requirements.
6.How does Aetrix verify that AT27LV512A-90JU-T is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-90JU-T 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-90JU-T meets industry standards.
7.What is the process for return or replacement of AT27LV512A-90JU-T?
All AT27LV512A-90JU-T units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-90JU-T, 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-90JU-T part is unused and in its original packaging.
Return procedure for AT27LV512A-90JU-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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