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Microchip Technology AT27LV512A-70TI
- Part No.:
- AT27LV512A-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT27LV512A-70TI.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,598
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Product details
Overview
AT27LV512A-70TI from Atmel is a 512 Kbit (64K × 8) one-time programmable EPROM with 70 ns read access time, dual-voltage operation (3.0–3.6 V or 4.5–5.5 V), and industrial temperature range (−40°C to +85°C). It serves as nonvolatile program storage in embedded controllers and legacy microprocessor systems requiring low-power, battery-compatible memory with JEDEC-standard pinout compatibility.
For engineers reviewing the AT27LV512A-70TI datasheet, AT27LV512A-70TI pinout, AT27LV512A-70TI application, or AT27LV512A-70TI equivalent, key selection criteria include its 70 ns tACC at 3.3 V, <1 µA typical standby current, rapid 100 µs/byte programming, TTL/CMOS I/O compatibility, and support for both 3.3 V and 5 V host systems without level-shifting.
Technical Context
The AT27LV512A-70TI implements a two-line control architecture (CE and OE/VPP) enabling bus contention avoidance in multi-device systems. Its dual-voltage design allows direct interfacing with 3.3 V logic while delivering TTL-level outputs compatible with 5 V systems - no external level translators required.
It uses Atmel's Rapid™ Programming Algorithm with 100 µs CE pulses and on-chip verification loops, requiring VCC = 6.5 V and OE/VPP = 13.0 V during programming. The integrated product identification code (Manufacturer ID: 0x1E, Device ID: 0x0D) ensures automatic algorithm selection in industry-standard programmers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8) OTP EPROM - fixed boot code or firmware storage with no re-erase capability. |
| Read Access Time (tACC) | 70 ns max at VCC = 3.0–3.6 V - enables 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 across 3 V and 5 V hosts. |
| Standby Current (ISB1) | 20 µA max at VCC = 3.6 V - enables ultra-low-power retention in portable or battery-backed applications. |
| Active Power Dissipation | 29 mW max at 5 MHz and VCC = 3.6 V - reduces thermal load and extends battery life vs. standard 5 V EPROMs. |
| Programming Voltage | VCC = 6.5 V ± 0.25 V, OE/VPP = 13.0 V ± 0.25 V - requires dedicated high-voltage programming supply, not supplied by target system. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control, instrumentation, and automotive under-hood modules. |
Pinout & Package
AT27LV512A-70TI is packaged in a 28-lead TSOP (Type 1, 28T), compliant with JEDEC MO-153. Pin 1 is marked at top-left corner; pin numbering proceeds counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus accepting full 64K address space; CMOS/TTL compatible thresholds. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus; outputs drive TTL loads directly at 3.3 V, eliminating level shifters. |
| CE | Chip Enable | Active-low chip select; controls device activation and power state transition between active/standby. |
| OE/VPP | Output Enable / Program Supply | Dual-function pin: OE during read mode (active-low), VPP during programming (13 V input). |
| GND | Ground Reference | Signal and power return; requires local 0.1 µF ceramic decoupling per device. |
| VCC | Power Supply | Primary supply input; must be applied simultaneously with or before OE/VPP to prevent latchup. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming | 100 µs/byte typical programming time with built-in verify-reprogram loop - cuts firmware update cycles by >5× vs. legacy EPROMs. |
| Integrated Product ID | Manufacturer ID 0x1E and Device ID 0x0D accessible via A0 toggle and A9 = 12 V - enables auto-detection and algorithm selection in universal programmers. |
| Two-Line Control | Separate CE and OE/VPP pins allow independent bus arbitration and output disable - prevents data bus contention in shared-memory systems. |
| ESD/Latchup Robustness | 2,000 V HBM ESD rating and 200 mA latchup immunity - enhances field reliability in uncontrolled assembly or test environments. |
| JEDEC Package Compatibility | Available in 28-lead TSOP (28T), SOIC (28R), and PLCC (32J) - enables drop-in replacement of AT27C512R in existing PCB footprints. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot ROM |
|---|---|
Use Scenario: Fixed firmware storage in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup sequence and configuration data for real-time control engines. Use Value: −40°C to +85°C qualification and 200 mA latchup immunity ensure uninterrupted operation during voltage transients and EMI exposure. |
Use Scenario: Boot code storage for Z80, 8051, or 68K-based embedded systems where firmware rarely changes after production. IC Role / Device Role / Timing Role: Read-only instruction memory mapped into CPU address space with 70 ns access enabling zero-wait-state execution. Use Value: Dual-voltage support allows same part to serve both 3.3 V portable variants and 5 V desktop versions of the same board design. |
| Medical Instrument Configuration Memory | Automotive Diagnostic Module Code Storage |
Use Scenario: Storing calibration tables and safety-critical initialization parameters in portable ultrasound or ECG devices. IC Role / Device Role / Timing Role: Secure, tamper-resistant OTP memory preventing unauthorized firmware modification post-manufacture. Use Value: <1 µA typical standby current extends battery life in always-on diagnostic modes without compromising data integrity. |
Use Scenario: Holding diagnostic protocol stacks and vehicle-specific lookup tables in OBD-II modules installed in engine bays. IC Role / Device Role / Timing Role: High-reliability program memory surviving repeated thermal cycling and vibration-induced stress. Use Value: 2,000 V ESD protection and −40°C to +85°C operation meet AEC-Q100 Class 2 requirements for under-hood electronics. |
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 mode; identical 70 ns tACC and 64K × 8 organization. | Requires dedicated 5 V rail; incompatible with 3.3 V systems without level translation. | Select when legacy 5 V design prohibits voltage scaling and board layout cannot accommodate new decoupling. |
| MX29LV512CTI-70G | 3 V flash memory (not OTP); supports 100K erase/write cycles; 70 ns access; same 28-pin TSOP footprint. | Field-upgradable firmware; higher endurance but requires erase-before-write and command sequencing. | Select when firmware updates are needed in-field; accept added complexity for reprogrammability over OTP simplicity. |
Compared with AT27C512R-70PC, AT27LV512A-70TI adds dual-voltage flexibility and lower standby power; compared with MX29LV512CTI-70G, it trades reprogrammability for guaranteed write-once security and simpler interface timing.
Availability
AT27LV512A-70TI is available at Aetrix Electronics and suitable for industrial automation, legacy embedded systems, and medical diagnostics requiring stable component supply, long-term lifecycle assurance, and JEDEC-standard OTP EPROM compatibility.
Supply support for AT27LV512A-70TI 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, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV512A product line delivers low-voltage, high-reliability OTP EPROMs optimized for cost-sensitive, long-lifecycle embedded systems where firmware immutability and dual-supply interoperability are critical.
FAQ
What is the maximum operating voltage for OE/VPP during programming of the AT27LV512A-70TI?
The AT27LV512A-70TI requires OE/VPP = 13.0 V ± 0.25 V during programming, as specified in the DC Programming Characteristics table. This voltage must be applied concurrently with VCC = 6.5 V ± 0.25 V. Applying OE/VPP above 14.0 V or below 11.5 V risks incomplete programming or device damage. The AT27LV512A-70TI does not support in-system programming without external high-voltage generation.
Can the AT27LV512A-70TI operate reliably at 3.0 V supply voltage?
Yes, the AT27LV512A-70TI is fully specified for operation across 3.0 V to 3.6 V. At VCC = 3.0 V, its read access time remains ≤70 ns, and standby current stays ≤20 µA. Output high voltage (VOH) meets 2.4 V minimum at IOH = −2.0 mA, ensuring robust TTL compatibility. The AT27LV512A-70TI maintains full functionality and timing compliance across the entire low-voltage range.
Is the AT27LV512A-70TI pin-compatible with the AT27C512R series?
Yes, the AT27LV512A-70TI shares identical pin functions and ordering conventions with the AT27C512R family across all JEDEC packages (TSOP, SOIC, PLCC). Address, data, CE, and OE/VPP pins map one-to-one. However, the AT27LV512A-70TI requires different programming voltages and supports dual-voltage read operation - hardware design must accommodate VCC switching and high-voltage programming circuitry.
What decoupling capacitors are required for stable operation of the AT27LV512A-70TI?
The AT27LV512A-70TI requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins. For boards with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor must also be placed near the power entry point. These values are mandated in the System Considerations section to suppress transient excursions caused by CE switching - omitting them may cause timing violations or data corruption in the AT27LV512A-70TI.
Does the AT27LV512A-70TI support identification code reading, and how is it accessed?
Yes, the AT27LV512A-70TI provides Manufacturer ID (0x1E) and Device ID (0x0D) via its Integrated Product Identification Code. To read it: hold A1–A15 low, set A9 = 12.0 V ± 0.5 V (VID), toggle A0 between low and high, and assert CE = VIL and OE/VPP = VIL. The ID bytes appear on O0–O7. This feature is used by programmers like Data I/O PS-200 to auto-select correct algorithms - the AT27LV512A-70TI responds identically to AT27C512R during ID reads.
AT27LV512A-70TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 28-TSSOP (0.465", 11.80mm Width)
- Packaging:
- Tray
- 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
AT27LV512A-70TI FAQ
1.How can I place an order for AT27LV512A-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-70TI 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-70TI reliable?
The price and inventory of AT27LV512A-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-70TI is usually 5 days.
3.What payment methods are accepted for AT27LV512A-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-70TI?
AT27LV512A-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-70TI 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-70TI?
For technical support, including AT27LV512A-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-70TI requirements.
6.How does Aetrix verify that AT27LV512A-70TI is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-70TI 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-70TI meets industry standards.
7.What is the process for return or replacement of AT27LV512A-70TI?
All AT27LV512A-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-70TI, 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-70TI part is unused and in its original packaging.
Return procedure for AT27LV512A-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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