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Microchip Technology AT27LV512A-70RC
- Part No.:
- AT27LV512A-70RC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-SOIC (0.342", 8.69mm Width)
- Datasheet:
-
AT27LV512A-70RC.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,835
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Product details
Overview
AT27LV512A-70RC from Atmel is a 64K × 8-bit one-time programmable EPROM (OTP EPROM) with 70 ns read access time, dual-voltage operation (3.0–3.6 V or 4.5–5.5 V), and JEDEC-standard 28-lead SOIC package. It delivers TTL-compatible outputs at 3.0 V and supports rapid programming at 100 µs/byte, enabling use in battery-powered portable systems requiring low-power nonvolatile storage.
For engineers reviewing the AT27LV512A-70RC datasheet, AT27LV512A-70RC pinout, AT27LV512A-70RC application, or AT27LV512A-70RC equivalent, key selection criteria include its 70 ns access time under 3.3 V supply, <1 µA typical standby current, JEDEC-compatibility with AT27C512R, dual-voltage flexibility, and support for industry-standard programming equipment without voltage conversion.
Technical Context
The AT27LV512A-70RC implements a CMOS-based OTP EPROM architecture with two-line control (CE and OE/VPP), enabling bus contention avoidance 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 five distinct modes-Read, Output Disable, Standby, Rapid Program, and Product Identification-each defined by specific CE and OE/VPP logic levels and voltage conditions. Programming requires VCC = 6.5 V and OE/VPP = 13.0 V, while identification uses A9 = 12.0 V and toggled A0 to select manufacturer or device code bytes.
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 | 70 ns max at VCC = 3.0–3.6 V, enabling direct interface with 10 MHz microcontrollers without wait states |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - supports mixed-voltage system designs and hot-plug compatibility with both 3.3 V and 5 V hosts |
| Standby Current | 20 µA max (≤1 µA typical at 3.3 V), critical for battery-backed applications requiring multi-year shelf life |
| Programming Speed | 100 µs/byte typical using Rapid™ algorithm, reducing production programming cycle time vs. legacy EPROMs |
| I/O Compatibility | CMOS and TTL-compatible inputs/outputs per LVTTL standard, eliminating level-shifter requirements in 5 V logic systems |
| ESD Protection | 2,000 V HBM - ensures robustness during board handling and in-circuit programming |
Pinout & Package
AT27LV512A-70RC is supplied in a 28-lead, 0.330-inch wide plastic gull-wing small outline (SOIC) package per JEDEC MS-012AB, with 1.27 mm lead pitch and surface-mount footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus accepting full 64K memory map; driven by microcontroller or FPGA address lines |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus (output-only in read mode); drives TTL/CMOS loads up to 2.1 mA sink |
| CE | Chip Enable | Active-low chip select controlling device activation; used for memory banking or peripheral selection |
| OE/VPP | Output Enable / Programming Supply | Dual-function pin: OE during read (active-low), VPP = 13.0 V during programming; requires external voltage switching |
| VCC | Power Supply | Primary supply input supporting 3.0–3.6 V or 4.5–5.5 V operation; decoupling capacitor required per datasheet |
| GND | Ground Reference | Signal and power return path; must be low-inductance connection adjacent to VCC decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | Reduces production programming time to ~100 µs/byte with automatic verify-and-reprogram loop, improving yield and throughput |
| Integrated Product Identification Code | Two-byte electronic ID (0x1E manufacturer, 0x0D device) enables auto-detection by programmers, eliminating manual part selection errors |
| Dual-Voltage Read Operation | Operates natively at 3.3 V with TTL-level outputs compatible with 5 V logic, enabling single-part deployment across 3 V and 5 V platforms |
| JEDEC Standard Pinout | Pin-compatible with AT27C512R in SOIC/PLCC/TSOP packages, allowing drop-in replacement in existing 5 V designs with no PCB change |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2 kV ESD protection ensure field reliability in industrial environments with noisy power rails |
Applications
| Industrial Control Firmware Storage | Portable Medical Device Boot Memory |
|---|---|
Use Scenario: Storing bootloader and calibration constants in PLC I/O modules operating in -40°C to +85°C ambient. IC Role / Device Role / Timing Role: Nonvolatile program memory providing deterministic 70 ns read access to initialize FPGA configuration and sensor interface logic. Use Value: Dual-voltage support allows same BOM for both 5 V legacy backplanes and new 3.3 V designs, reducing inventory complexity. |
Use Scenario: Holding certified firmware images in handheld ECG monitors powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-power OTP EPROM delivering verified boot code with <1 µA standby draw to extend battery life beyond 5 years. Use Value: Rapid™ programming enables in-factory firmware personalization without adding test time or equipment cost. |
| Legacy System Upgrade Memory | Automotive Diagnostic Tool ROM |
Use Scenario: Replacing obsolete 27C512 EPROMs in telecom line cards where 5 V supply remains but power budget tightened. IC Role / Device Role / Timing Role: Pin- and function-compatible upgrade path preserving existing PCB layout while cutting active power by >80% at 5 MHz. Use Value: JEDEC-compatibility with AT27C512R eliminates redesign risk and qualification delays for field-replaceable units. |
Use Scenario: Storing diagnostic protocol stacks and vehicle-specific lookup tables in OBD-II scan tools subjected to automotive temperature cycling. IC Role / Device Role / Timing Role: Industrial-grade OTP EPROM with -40°C to +85°C operation and 200 mA latchup immunity for under-hood tool variants. Use Value: Integrated product ID prevents firmware corruption during multi-device programming batches in manufacturing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C512R-70PC | 5 V only (4.5–5.5 V), no low-voltage operation; identical 70 ns speed and SOIC-28 pinout | Requires dedicated 5 V rail; unsuitable for battery-powered or mixed-voltage systems | Select when legacy 5 V design must retain exact electrical behavior and no voltage scaling is needed |
| MX29LV512CTI-70G | 3 V flash memory (not OTP), 70 ns access, 100k write/erase cycles, different command-set and VPP requirements | Field-upgradable firmware capability; requires flash-specific controller logic and erase management | Select when firmware updates in the field are required, accepting higher cost and complexity vs. one-time programming simplicity |
Compared with AT27C512R-70PC and MX29LV512CTI-70G, the AT27LV512A-70RC uniquely balances low-voltage operation, zero write endurance constraints, and plug-compatible replacement of legacy 5 V EPROMs-making it optimal for cost-sensitive, unchangeable firmware deployments where power efficiency and supply flexibility are primary drivers.
Availability
AT27LV512A-70RC is available at Aetrix Electronics and suitable for industrial control firmware storage, portable medical device boot memory, and legacy system upgrade memory requiring stable component supply and long-term obsolescence management.
Supply support for AT27LV512A-70RC 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV512A-70RC belongs to Atmel's low-voltage OTP EPROM product line, designed specifically to replace 5 V EPROMs in power-constrained and mixed-voltage embedded systems while maintaining full JEDEC compatibility and programming infrastructure reuse.
FAQ
What is the maximum operating temperature range for the AT27LV512A-70RC?
The AT27LV512A-70RC 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, where "RI" and "TI" suffixes denote industrial-grade versions. The "RC" suffix in AT27LV512A-70RC explicitly indicates the 28-lead SOIC package with industrial temperature range.
Does the AT27LV512A-70RC require a separate programming voltage supply?
Yes, the AT27LV512A-70RC requires VPP = 13.0 V ± 0.25 V applied to the OE/VPP pin during programming, while VCC must be set to 6.5 V ± 0.25 V. These voltages are specified in the DC Programming Characteristics table and differ from read-mode supply requirements. The OE/VPP pin serves dual roles: output enable during read and programming voltage input during write.
Is the AT27LV512A-70RC pin-compatible with the AT27C512R in SOIC packages?
Yes, the AT27LV512A-70RC is pin-compatible with the AT27C512R in the 28-lead SOIC package (28R). The Pin Configurations section confirms identical pin numbering and functions for SOIC top view, and the Features list explicitly states JEDEC compatibility. No PCB layout changes are required when substituting AT27LV512A-70RC for AT27C512R in SOIC footprints.
What is the typical standby current consumption of the AT27LV512A-70RC at 3.3 V?
The typical standby current consumption of the AT27LV512A-70RC at VCC = 3.3 V is less than 1 µA, as stated in the Features section and confirmed in the DC Operating Characteristics table under ISB1 (CMOS standby current). The maximum specified value is 20 µA, making it suitable for ultra-low-power applications such as battery-backed memory retention.
How does the Rapid™ Programming Algorithm improve production efficiency for the AT27LV512A-70RC?
The Rapid™ Programming Algorithm reduces average programming time to 100 µs per byte with an integrated verify-and-reprogram loop, significantly accelerating production throughput compared to conventional EPROM algorithms. It eliminates manual verification steps and supports automatic failure detection after 10 pulses per byte, directly lowering test time and increasing first-pass yield for AT27LV512A-70RC programming operations.
AT27LV512A-70RC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-SOIC (0.342", 8.69mm Width)
- 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:
- 70 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:
- 28-SOIC
AT27LV512A-70RC FAQ
1.How can I place an order for AT27LV512A-70RC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-70RC 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-70RC reliable?
The price and inventory of AT27LV512A-70RC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-70RC is usually 5 days.
3.What payment methods are accepted for AT27LV512A-70RC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-70RC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-70RC?
AT27LV512A-70RC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-70RC 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-70RC?
For technical support, including AT27LV512A-70RC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-70RC requirements.
6.How does Aetrix verify that AT27LV512A-70RC is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-70RC 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-70RC meets industry standards.
7.What is the process for return or replacement of AT27LV512A-70RC?
All AT27LV512A-70RC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-70RC, 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-70RC part is unused and in its original packaging.
Return procedure for AT27LV512A-70RC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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