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Microchip Technology AT27LV512A-12JI
- Part No.:
- AT27LV512A-12JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV512A-12JI.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:2,080
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Product details
Overview
AT27LV512A-12JI from Atmel is a 64K × 8-bit one-time programmable EPROM (OTP EPROM) operating at 3.0V–3.6V or 4.5V–5.5V, with 70 ns read access time, 20 µA max standby current at 3.6V, and JEDEC-standard 32-lead PLCC packaging. It serves as non-volatile program storage in battery-powered portable systems requiring low-voltage operation and TTL-compatible outputs.
For engineers reviewing the AT27LV512A-12JI datasheet, AT27LV512A-12JI pinout, AT27LV512A-12JI application, or AT27LV512A-12JI equivalent, key selection considerations include dual-voltage compatibility, rapid 100 µs/byte programming, industrial temperature range (−40°C to +85°C), and JEDEC-standard PLCC package with two-line control (CE/OE).
Technical Context
The AT27LV512A-12JI implements a CMOS-based OTP EPROM architecture with address decoding for 64K × 8-bit organization, supporting both low-voltage (3.0–3.6V) and standard 5V ±10% supply modes. Its dual-mode operation enables interoperability with legacy 5V systems while delivering sub-1 µA typical standby current at 3.3V.
It uses a two-line enable scheme (CE and OE/VPP) to manage bus contention and supports product identification via A9 high-voltage (12.0 V ±0.5 V) and A0 toggling for manufacturer/device code readout. Programming requires VCC = 6.5 V and OE/VPP = 13.0 V, with Rapid™ algorithm enabling 100 µs/byte typical write pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8), fixed OTP configuration-no erase capability, suitable for firmware boot code storage. |
| Read Access Time | 70 ns maximum at VCC = 3.0–3.6V-enables direct interface with 14 MHz microcontrollers without wait states. |
| Supply Voltage Range | 3.0V–3.6V or 4.5V–5.5V-supports dual-supply system designs and hot-plug compatibility across 3V/5V hosts. |
| Standby Current | 20 µA maximum at VCC = 3.6V-reduces quiescent power in battery-backed applications such as handheld terminals. |
| Operating Temperature | −40°C to +85°C-qualified for industrial environments including factory automation controllers and embedded instrumentation. |
| Programming Voltage | VCC = 6.5 V ±0.25 V, OE/VPP = 13.0 V ±0.25 V-requires dedicated programming hardware; not field-reprogrammable in-system. |
| ESD Protection | 2,000 V HBM-enhances robustness during handling and PCB assembly in high-volume manufacturing. |
Pinout & Package
AT27LV512A-12JI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE. Pins 1 and 17 are no-connect (NC) and must remain unconnected on PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus accepting 0x0000–0xFFFF; all inputs CMOS/TTL compatible with VIL ≤ 0.8 V, VIH ≥ 2.0 V. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus in read mode; outputs drive TTL loads (IOH = −400 µA, VOL = 0.4 V at IOL = 2.1 mA). |
| CE | Chip Enable | Active-low chip select; device enters standby when CE = VIH, reducing ICC to ≤20 µA. |
| OE/VPP | Output Enable / Program Supply | Dual-function pin: OE during read (active-low), VPP = 13.0 V during programming; must be isolated from VCC during program mode. |
| VCC | Power Supply | Accepts 3.0–3.6V or 4.5–5.5V; decoupling requires 0.1 µF ceramic capacitor placed adjacent to pin. |
| GND | Ground Reference | Signal and power ground reference; shared return path for all I/O and internal logic. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with automatic verify/reprogram loop-reduces production programming cycle time by >5× vs. legacy EPROMs. |
| Integrated Product Identification Code | Manufacturer ID = 0x1E, Device ID = 0x0D-enables automated programmer recognition and eliminates manual device selection errors. |
| Two-Line Control Architecture | Independent CE and OE/VPP pins-prevents bus contention in multi-device memory maps and simplifies timing-critical read strobe design. |
| TTL-Compatible I/O at 3.0V | VOH ≥ 2.4 V, VOL ≤ 0.4 V at VCC = 3.0V-directly interfaces with 5V TTL logic without level shifters in mixed-supply systems. |
| JEDEC-Standard Packaging | 32J PLCC footprint-ensures drop-in replacement compatibility with AT27C512R and other JEDEC 32-pin OTP EPROM footprints. |
Applications
| Industrial PLC Firmware Storage | Portable Medical Device Boot ROM |
|---|---|
Use Scenario: Non-volatile storage of ladder logic firmware in DIN-rail mounted programmable logic controllers exposed to wide ambient temperatures. IC Role / Device Role / Timing Role: OTP EPROM providing immutable boot code execution upon power-up; accessed via parallel bus with 70 ns tACC timing. Use Value: Industrial temperature rating (−40°C to +85°C) and 2,000 V ESD protection ensure reliable operation in electrically noisy factory environments. |
Use Scenario: Storing certified diagnostic firmware in handheld ultrasound or glucose meter devices powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Low-voltage OTP memory enabling direct 3.3V system integration without voltage translation; 20 µA max ISB extends battery life between charges. Use Value: Dual-voltage support allows same BOM usage across 3V portable and 5V bench-test versions, reducing inventory complexity. |
| Legacy Embedded System Upgrade | Card-Based Test Equipment Memory |
Use Scenario: Replacing obsolete 5V-only EPROMs (e.g., AT27C512R) in aging telecom line cards without PCB redesign. IC Role / Device Role / Timing Role: Pin-compatible OTP EPROM with identical 32J PLCC footprint and JEDEC-standard timing-tACC = 70 ns matches original spec. Use Value: Full functional and mechanical compatibility eliminates requalification effort; Rapid™ programming maintains existing production throughput. |
Use Scenario: Firmware storage in modular PXI or VXI test modules requiring hot-swap capability across 3V and 5V chassis backplanes. IC Role / Device Role / Timing Role: Dual-supply OTP EPROM enabling plug-and-play operation in mixed-voltage test systems; OE/VPP pin supports in-cradle programming. Use Value: 3.0–3.6V/4.5–5.5V operation guarantees correct output levels and timing regardless of host slot voltage, eliminating adapter boards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C512R-70JC | 5V-only operation (4.5–5.5V); no low-voltage mode; identical 64K×8 OTP structure and PLCC package. | Lacks 3.0–3.6V support-unsuitable for battery-powered or dual-supply systems. | Select only for pure 5V legacy replacements where voltage flexibility is unnecessary. |
| MX29LV512CTTI-70G | 3V-only Flash (not OTP); supports 100K write/erase cycles; 70 ns access; TSOP-32 package (not PLCC). | Reprogrammable in-system; different pinout and command set; requires firmware update infrastructure. | Choose for field-upgradable applications-requires PCB redesign due to TSOP-32 footprint and different control signals. |
Compared with AT27LV512A-12JI, AT27C512R-70JC offers identical functionality at 5V but sacrifices low-power portability, while MX29LV512CTTI-70G provides reprogrammability at the cost of OTP simplicity, voltage flexibility, and PLCC compatibility.
Availability
AT27LV512A-12JI is available at Aetrix Electronics and suitable for industrial automation controllers, portable medical diagnostics, and legacy system upgrades requiring stable component supply, long-lifecycle assurance, and JEDEC-standard OTP EPROM compatibility.
Supply support for AT27LV512A-12JI 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 designer specializing in microcontrollers, non-volatile memory, and secure authentication ICs.
The AT27LV512A product line delivers low-voltage, high-reliability OTP EPROMs optimized for portable, industrial, and upgrade-focused embedded systems requiring immutable firmware storage with minimal power overhead.
FAQ
What is the operating temperature range for AT27LV512A-12JI?
The AT27LV512A-12JI is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the Ordering Information table and Absolute Maximum Ratings section of the datasheet, and applies to all electrical parameters including tACC = 70 ns, ISB ≤ 20 µA, and VCC = 3.0–3.6V or 4.5–5.5V operation. The "I" suffix explicitly denotes industrial grade.
Does AT27LV512A-12JI support in-system programming?
No, AT27LV512A-12JI does not support in-system programming. It requires dedicated EPROM programmers applying VCC = 6.5 V and OE/VPP = 13.0 V during programming. The device lacks internal charge pumps or command-based write logic; programming is performed externally using the Rapid™ algorithm with 100 µs CE pulses, and the OTP structure prevents erasure or reprogramming after initial programming.
Is AT27LV512A-12JI pin-compatible with AT27C512R?
Yes, AT27LV512A-12JI is pin-compatible with AT27C512R in the 32-lead PLCC package (32J). Both share identical pin functions (A0–A15, O0–O7, CE, OE/VPP, VCC, GND), same pinout order, and JEDEC MS-016 AE footprint. However, AT27LV512A-12JI adds dual-voltage support and lower standby current, while maintaining full read-mode timing equivalence at 70 ns.
What decoupling capacitance is required for AT27LV512A-12JI?
Per the System Considerations section, AT27LV512A-12JI requires a 0.1 µF high-frequency ceramic capacitor connected between VCC and GND, placed as close as possible to the device pins. For arrays with multiple devices, a 4.7 µF bulk electrolytic capacitor should also be added near the power entry point. These values are mandatory to suppress transient excursions during CE switching and ensure data sheet compliance.
Can AT27LV512A-12JI operate reliably at 3.0V supply?
Yes, AT27LV512A-12JI is fully specified for operation at 3.0V. The datasheet confirms tACC < 70 ns, VOH ≥ 2.4 V, and VOL ≤ 0.4 V at VCC = 3.0V, with standby current typically below 1 µA. Its design targets battery-powered portable systems where 3.0V represents nominal single-cell Li-ion or alkaline operation, and TTL-level outputs remain compatible with 5V logic families.
AT27LV512A-12JI 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:
- 120 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-12JI FAQ
1.How can I place an order for AT27LV512A-12JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-12JI 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-12JI reliable?
The price and inventory of AT27LV512A-12JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-12JI is usually 5 days.
3.What payment methods are accepted for AT27LV512A-12JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-12JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-12JI?
AT27LV512A-12JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-12JI 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-12JI?
For technical support, including AT27LV512A-12JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-12JI requirements.
6.How does Aetrix verify that AT27LV512A-12JI is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-12JI 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-12JI meets industry standards.
7.What is the process for return or replacement of AT27LV512A-12JI?
All AT27LV512A-12JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-12JI, 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-12JI part is unused and in its original packaging.
Return procedure for AT27LV512A-12JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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