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Microchip Technology AT27LV512A-90JC
- Part No.:
- AT27LV512A-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV512A-90JC.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,602
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Product details
Overview
AT27LV512A-90JC from Atmel is a 64K × 8-bit (512 Kbit) one-time programmable EPROM optimized for low-voltage battery-powered systems, featuring 90 ns read access time at 3.0–3.6 V or 4.5–5.5 V, dual-supply compatibility, and JEDEC-standard PLCC-32 packaging. It delivers TTL-compatible outputs at 3.0 V and supports rapid programming at 100 µs/byte.
For engineers reviewing the AT27LV512A-90JC datasheet, AT27LV512A-90JC pinout, AT27LV512A-90JC application, or AT27LV512A-90JC equivalent, key selection criteria include its 90 ns tACC timing grade, 3.0–3.6 V / 4.5–5.5 V dual-voltage operation, 20 µA max standby current, JEDEC-compliant PLCC-32 footprint, and OTP compatibility with AT27C512R.
Technical Context
The AT27LV512A-90JC implements a CMOS-based OTP EPROM architecture with two-line control (CE and OE/VPP), enabling bus contention prevention in shared-memory systems. Its address decoding covers A0–A15 (16-bit), supporting full 64K-byte addressing with output data lines O0–O7.
It operates in three primary modes: Read (CE=VIL, OE/VPP=VIL), Output Disable (CE=VIL, OE/VPP=VIH), and Standby (CE=VIH). Programming requires VCC = 6.5 V and OE/VPP = 13.0 V, using a Rapid™ algorithm with 100 µs CE pulses and verification loops per byte.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 64K × 8 bits (524,288 bits), directly maps to 64 KiB of non-volatile storage without refresh or write cycles |
| Read Access Time (tACC) | 90 ns maximum at VCC = 3.0–3.6 V or 4.5–5.5 V - defines minimum clock period for reliable byte reads in microcontroller or FPGA boot memory applications |
| Supply Voltage Range | 3.0–3.6 V (low-voltage mode) or 4.5–5.5 V (5V mode) - enables drop-in use in both legacy 5V and modern low-power 3.3V systems |
| Standby Current (ISB1) | 20 µA maximum at VCC = 3.6 V - ensures ultra-low power retention during system sleep, critical for portable/battery-operated devices |
| Programming Voltage (VPP) | 13.0 ± 0.25 V applied to OE/VPP pin - required only during OTP programming; not used in normal read operation |
| Input/Output Compatibility | CMOS and TTL compatible I/O - allows direct interfacing with 5V microcontrollers (e.g., 8051, Z80) even when powered at 3.0 V |
| Package Type | 32-lead PLCC (JEDEC MS-016 AE) - surface-mount package with J-leads, suitable for reflow assembly and socketed prototyping |
Pinout & Package
AT27LV512A-90JC is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE. Pins 1 and 17 are designated "DON'T CONNECT" and must remain unconnected in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus inputs; fully decoded to select one of 65,536 bytes; high-impedance when CE = VIH |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus outputs in read mode; high-impedance (Hi-Z) during Output Disable or Standby |
| CE | Chip Enable | Active-low chip select; controls device activation and entry into Standby mode when high |
| OE/VPP | Output Enable / Program Supply | Active-low output enable in read mode; serves as 13 V programming voltage input during OTP programming |
| VCC | Power Supply | Primary supply pin: accepts 3.0–3.6 V or 4.5–5.5 V; must be applied before/with OE/VPP |
| GND | Ground | Reference ground for all signals and power; requires local 0.1 µF ceramic decoupling |
| NC | No Connect | Pins 1 and 17 are internally unconnected - must be left floating, not tied to VCC or GND |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with built-in verify-and-reprogram loop - reduces production programming cycle time vs. standard EPROMs |
| Integrated Product Identification Code | Manufacturer ID = 0x1E, Device ID = 0x0D - enables automatic algorithm selection in industry-standard programmers (e.g., BP Microsystems, Xeltek) |
| Dual-Voltage Operation | Single device supports both 3.3 V embedded systems and 5 V legacy backplanes - eliminates BOM splits for mixed-voltage platforms |
| ESD & Latchup Robustness | 2,000 V HBM ESD rating and 200 mA latchup immunity - enhances reliability in handling-sensitive industrial and test environments |
| JEDEC-Standard Pinout | Pin-compatible with AT27C512R and other 28-pin SOIC/TSOP variants via package-specific mapping - simplifies migration and second-sourcing |
Applications
| Industrial Control Firmware Storage | Legacy System BIOS/Boot ROM |
|---|---|
Use Scenario: Storing fixed firmware for PLC I/O modules operating in -40°C to +85°C environments with 24 V DC field power supplies. IC Role / Device Role / Timing Role: Non-volatile boot memory providing deterministic 90 ns instruction fetch timing to microcontrollers during cold-start sequences. Use Value: Eliminates need for external voltage translators due to 3.0 V operation with TTL-level outputs compatible with 5 V logic buses. |
Use Scenario: Replacing obsolete 27C512 EPROMs in ISA-bus expansion cards requiring field-upgradeable configuration code. IC Role / Device Role / Timing Role: Pin- and function-equivalent OTP replacement for AT27C512R in 5 V systems, retaining identical programming flow and socket footprint. Use Value: Enables continued production of legacy boards using same programming equipment and JEDEC-standard PLCC-32 sockets. |
| Portable Medical Device Boot Memory | Automotive Diagnostic Tool Calibration Data |
Use Scenario: Holding immutable boot loader and safety-critical startup routines in handheld ultrasound units powered by Li-ion batteries (3.3 V nominal). IC Role / Device Role / Timing Role: Low-power OTP storage ensuring <20 µA standby draw during device sleep, extending battery life between charges. Use Value: Meets stringent energy budget requirements while delivering sub-100 ns read latency for real-time initialization sequences. |
Use Scenario: Storing vehicle-specific calibration tables and protocol stacks in OBD-II scan tools subjected to automotive temperature cycling (-40°C to +85°C). IC Role / Device Role / Timing Role: Industrial-grade OTP EPROM with guaranteed operation across full temperature range and high ESD tolerance for workshop environments. Use Value: Prevents data corruption from electrostatic discharge during technician handling and ensures long-term data retention without refresh. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C512R-90PC | 5 V-only operation (4.5–5.5 V); no low-voltage mode; same 90 ns tACC and PLCC-28 package | Requires dedicated 5 V rail; incompatible with 3.3 V systems; lacks integrated product ID code | Select when system uses only 5 V and legacy programming infrastructure is fixed to 5 V VPP |
| MN65E512AP-90PL | Same 64K×8 OTP structure, 90 ns speed, and PLCC-32 package; manufactured by Macronix; JEDEC-compatible but different ID codes | Requires revalidation of programming algorithms and ID recognition in automated handlers | Choose for supply chain diversification where Atmel sourcing is constrained, with full requalification of programming flow |
Compared with AT27C512R-90PC, the AT27LV512A-90JC adds dual-voltage flexibility and lower standby power, while MN65E512AP-90PL offers an alternate source with identical timing and footprint but distinct programming identification - making AT27LV512A-90JC optimal for new designs needing 3.3 V compatibility and seamless AT27C512R migration.
Availability
AT27LV512A-90JC is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy system BIOS/Boot ROM replacement, and portable medical device boot memory requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT27LV512A-90JC 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 non-volatile memory, microcontrollers, and programmable logic devices, known for innovation in low-power OTP and Flash technologies.
The AT27LV512A belongs to Atmel's LV-series OTP EPROM product line, engineered specifically for battery-powered and mixed-voltage embedded systems requiring reliable, low-power, pin-compatible replacements for standard 5 V EPROMs.
FAQ
What is the maximum operating temperature range for the AT27LV512A-90JC?
The AT27LV512A-90JC 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 and timing parameters under both 3.0–3.6 V and 4.5–5.5 V supply conditions. The PLCC-32 package construction supports thermal stability across this full range.
Can the AT27LV512A-90JC be used in a 5 V system without level shifters?
Yes, the AT27LV512A-90JC supports standard 5 V ±10% operation (4.5–5.5 V) and features TTL-compatible outputs that meet VOH ≥ 2.4 V and VOL ≤ 0.4 V driving 2.1 mA loads - matching standard 5 V TTL logic thresholds. No level shifting is required when interfacing with 5 V microcontrollers or FPGAs, and it uses the same programming equipment as AT27C512R.
What programming voltage is required for the AT27LV512A-90JC?
The AT27LV512A-90JC requires OE/VPP = 13.0 ± 0.25 V during OTP programming, with VCC simultaneously held at 6.5 ± 0.25 V. This is explicitly defined in the DC Programming Characteristics table. Normal read operation uses only VCC (3.0–3.6 V or 4.5–5.5 V); VPP is not present or required outside programming mode.
Is the AT27LV512A-90JC pin-compatible with the AT27C512R?
The AT27LV512A-90JC is functionally and electrically compatible with AT27C512R in 5 V systems and shares identical programming behavior, but differs in package: AT27LV512A-90JC uses PLCC-32, whereas AT27C512R-90PC uses PLCC-28. Pin mapping is not identical - PLCC-32 has additional NC and power pins. Direct socket replacement requires matching package type (e.g., AT27LV512A-90RC for SOIC-28).
Does the AT27LV512A-90JC support read-modify-write operations?
No, the AT27LV512A-90JC is a one-time programmable (OTP) EPROM and does not support in-system erasure or reprogramming after initial programming. It lacks UV-erasable quartz window or electrical erase capability. Data written during programming is permanent; any modification requires physical device replacement. The Rapid™ algorithm applies only during the single initial programming pass.
AT27LV512A-90JC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT27LV512A-90JC FAQ
1.How can I place an order for AT27LV512A-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-90JC 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-90JC reliable?
The price and inventory of AT27LV512A-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-90JC is usually 5 days.
3.What payment methods are accepted for AT27LV512A-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-90JC?
AT27LV512A-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-90JC 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-90JC?
For technical support, including AT27LV512A-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-90JC requirements.
6.How does Aetrix verify that AT27LV512A-90JC is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-90JC 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-90JC meets industry standards.
7.What is the process for return or replacement of AT27LV512A-90JC?
All AT27LV512A-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-90JC, 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-90JC part is unused and in its original packaging.
Return procedure for AT27LV512A-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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