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Microchip Technology AT27LV512A-90TI
- Part No.:
- AT27LV512A-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT27LV512A-90TI.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,516
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Product details
Overview
AT27LV512A-90TI from Atmel is a 64K × 8-bit one-time programmable EPROM (OTP EPROM) operating at 3.0–3.6V or 4.5–5.5V, featuring 90 ns read access time, 20 µA max standby current at VCC = 3.6V, and JEDEC-standard 28-lead TSOP 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-90TI datasheet, AT27LV512A-90TI pinout, AT27LV512A-90TI application, or AT27LV512A-90TI equivalent, key selection criteria include dual-voltage compatibility (3.3V/5V), industrial temperature range (−40°C to +85°C), rapid programming (100 µs/byte), JEDEC-standard TSOP package, and OTP reliability for firmware boot code storage.
Technical Context
The AT27LV512A-90TI implements a CMOS-based OTP memory array with two-line control (CE/OE/VPP), enabling bus contention prevention in shared-data-bus systems. Its dual-voltage architecture supports both low-power 3.3V operation and legacy 5V system integration without level-shifting.
It uses Atmel's Rapid™ Programming Algorithm with 100 µs CE pulses and on-chip verification loops, requiring VCC = 6.5V and OE/VPP = 13.0V during programming. Product identification is enabled via A9 high-voltage (12.0 V) and A0 toggling to select manufacturer/device ID bytes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8) - provides sufficient space for boot firmware or configuration data in embedded controllers. |
| Read Access Time | 90 ns max at VCC = 3.0–3.6V - enables direct interface with 10 MHz microcontrollers without wait states. |
| Supply Voltage Range | 3.0–3.6V or 4.5–5.5V - allows drop-in use in both modern low-voltage and legacy 5V systems. |
| Standby Current | 20 µA max at VCC = 3.6V - supports ultra-low-power sleep modes in portable equipment. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade environmental robustness without derating. |
| Package Type | 28-lead TSOP (Type 1) - surface-mount compatible with automated PCB assembly and space-constrained layouts. |
| Programming Voltage | VCC = 6.5V, OE/VPP = 13.0V - requires dedicated programming hardware but ensures reliable OTP cell write margin. |
Pinout & Package
AT27LV512A-90TI is supplied in a 28-lead Thin Small Outline Package (TSOP, Type 1), JEDEC MS-012AC compliant, with 0.55 mm lead pitch and body dimensions 11.7 mm × 7.9 mm × 1.05 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus accepting full 64K address space; CMOS/TTL compatible thresholds ensure interoperability with diverse controllers. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus with TTL-level VOH ≥ 2.4V at IOH = −2.0 mA, directly driving standard logic loads. |
| CE | Chip Enable | Active-low chip select; controls device activation and power state transition between active/standby modes. |
| OE/VPP | Output Enable / Program Supply | Dual-function pin: OE during read mode (TTL-compatible), VPP = 13.0V during programming; requires voltage sequencing per spec. |
| GND | Ground Reference | Primary return path for all I/O and supply currents; decoupling capacitor placement critical per layout guidelines. |
| VCC | Power Supply | Single-supply input supporting 3.0–3.6V or 4.5–5.5V; must be applied before/removed after OE/VPP to prevent latchup. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with built-in verify-reprogram loop - reduces production programming cycle time by >5× vs conventional EPROMs. |
| Integrated Product ID Code | Manufacturer ID = 0x1E, Device ID = 0x0D - enables automatic algorithm selection in industry-standard programmers, eliminating manual setup errors. |
| Two-Line Control Architecture | Independent CE and OE/VPP pins - allows flexible bus arbitration and eliminates need for external gating logic in multi-device systems. |
| ESD & Latchup Robustness | 2,000V HBM ESD protection and 200 mA latchup immunity - enhances field reliability in handling-sensitive industrial environments. |
| Low-Power CMOS Design | 18 mW typical active power at 5 MHz / 3.3V - cuts thermal load and extends battery life in portable instrumentation and handheld devices. |
Applications
| Industrial PLC Firmware Storage | Portable Medical Device Boot ROM |
|---|---|
|
Use Scenario: Storing immutable boot firmware and safety-critical calibration tables in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Non-volatile program memory providing deterministic startup sequence and secure firmware integrity. Use Value: Industrial temperature rating (−40°C to +85°C) and 200 mA latchup immunity ensure continuous operation in electrically noisy plant-floor environments. |
Use Scenario: Holding certified bootloader and regulatory-compliant initialization routines in battery-powered glucose meters and infusion pumps. IC Role / Device Role / Timing Role: OTP EPROM delivering tamper-resistant, unalterable startup code with guaranteed retention over product lifetime. Use Value: 20 µA max standby current at 3.3V extends single-charge battery life beyond 12 months in always-on medical monitoring functions. |
| Legacy 5V Embedded System Upgrade | Modular Test Equipment Configuration Memory |
|
Use Scenario: Replacing obsolete 5V-only EPROMs (e.g., AT27C512R) in existing industrial control cards without board redesign. IC Role / Device Role / Timing Role: Pin- and function-compatible OTP memory supporting identical timing and voltage interfaces across both 3.3V and 5V host systems. Use Value: Dual-voltage operation (3.0–3.6V / 4.5–5.5V) and JEDEC-standard TSOP footprint enable seamless drop-in replacement with no PCB changes. |
Use Scenario: Storing calibrated sensor coefficients and test profile definitions in modular benchtop analyzers with hot-swappable modules. IC Role / Device Role / Timing Role: One-time programmable configuration store ensuring traceable, version-controlled module identity and calibration data. Use Value: Integrated product ID code (0x1E/0x0D) allows automatic module recognition and firmware matching during system initialization. |
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 | 5V-only operation (4.5–5.5V); no low-voltage mode; 70 ns access; 28-pin PDIP package. | Lacks 3.3V compatibility and industrial temp grade; suitable only for legacy 5V through-hole designs. | Select when replacing older DIP-based systems where board space and voltage flexibility are not constraints. |
| MX29LV512CTI-90G | 3.3V-only flash memory; 90 ns access; 28-pin TSOP; supports erase/rewrite; higher endurance than OTP. | Not OTP - supports field updates; lacks integrated ID code; different programming protocol and voltage requirements. | Select when firmware update capability is required; not suitable for security-critical immutable boot code storage. |
Compared with AT27C512R-70PC, AT27LV512A-90TI adds dual-voltage support and industrial temperature range but retains identical pinout and programming compatibility; compared with MX29LV512CTI-90G, it trades reprogrammability for OTP security and simpler programming infrastructure.
Availability
AT27LV512A-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, portable medical device boot ROM, and legacy 5V embedded system upgrades requiring stable component supply and long-term lifecycle continuity.
Supply support for AT27LV512A-90TI 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 innovator specializing in microcontrollers, non-volatile 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, safety-critical embedded systems requiring immutable firmware storage and long-term data retention without battery backup.
FAQ
What voltage ranges does the AT27LV512A-90TI support during normal read operation?
The AT27LV512A-90TI supports two distinct read-mode supply ranges: 3.0V to 3.6V for low-power portable applications, and 4.5V to 5.5V for compatibility with legacy 5V systems. Both ranges deliver guaranteed 90 ns access time and TTL-compatible output levels, enabling direct interfacing without level shifters. The device automatically adapts its internal logic thresholds based on VCC level.
Is the AT27LV512A-90TI pin-compatible with the AT27C512R series?
Yes, the AT27LV512A-90TI is fully pin-compatible and functionally equivalent to the AT27C512R in read and programming modes. It shares identical pin assignments, timing parameters, and programming algorithms - including the same Rapid™ 100 µs/byte pulse method and VPP = 13.0V requirement. This allows direct substitution in existing AT27C512R designs, provided the 3.3V/5V dual-supply capability is leveraged.
What is the purpose of the OE/VPP pin on the AT27LV512A-90TI?
The OE/VPP pin on the AT27LV512A-90TI serves a dual role: during read operation, it functions as Output Enable (OE), controlling data bus output enable/disable; during programming, it becomes the high-voltage Program Supply (VPP = 13.0V) input. This dual functionality eliminates the need for separate OE and VPP pins, preserving pin count while maintaining JEDEC compatibility. Proper voltage sequencing (VCC before VPP, VPP before VCC removal) is mandatory to avoid damage.
Does the AT27LV512A-90TI require external decoupling capacitors, and if so, what values?
Yes, the AT27LV512A-90TI requires two decoupling capacitors per device: a 0.1 µF high-frequency ceramic capacitor placed as close as possible between VCC and GND pins to suppress transient noise during CE transitions, and a 4.7 µF bulk electrolytic capacitor near the power entry point for arrays of multiple devices. These values are specified in the "System Considerations" section of the datasheet to prevent voltage excursions that could cause non-conformance or latchup.
How is the manufacturer and device identification accessed on the AT27LV512A-90TI?
The AT27LV512A-90TI provides an integrated Product Identification Code accessible via dedicated read mode: hold all address lines A1–A15 low, set A9 to 12.0 V (VID), and toggle A0 between low and high to select either the Manufacturer ID byte (0x1E) or Device ID byte (0x0D). This feature enables automatic recognition by industry-standard programmers and eliminates manual part selection errors during production programming.
AT27LV512A-90TI 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:
- 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:
- 28-TSOP
AT27LV512A-90TI FAQ
1.How can I place an order for AT27LV512A-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-90TI 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-90TI reliable?
The price and inventory of AT27LV512A-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-90TI is usually 5 days.
3.What payment methods are accepted for AT27LV512A-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-90TI?
AT27LV512A-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-90TI 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-90TI?
For technical support, including AT27LV512A-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-90TI requirements.
6.How does Aetrix verify that AT27LV512A-90TI is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-90TI 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-90TI meets industry standards.
7.What is the process for return or replacement of AT27LV512A-90TI?
All AT27LV512A-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-90TI, 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-90TI part is unused and in its original packaging.
Return procedure for AT27LV512A-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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