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Microchip Technology AT27LV512A-90TC
- Part No.:
- AT27LV512A-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 28-TSSOP (0.465", 11.80mm Width)
- Datasheet:
-
AT27LV512A-90TC.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 28TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,449
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Product details
Overview
AT27LV512A-90TC from Atmel is a 64K × 8-bit one-time programmable EPROM (OTP EPROM) operating at 3.0–3.6V or 4.5–5.5V, with 90 ns read access time, 20 µA max standby current at 3.6V, and JEDEC-standard 28-lead TSOP packaging. It serves as non-volatile program storage in battery-powered embedded controllers and legacy microprocessor systems requiring low-voltage compatibility and pin-for-pin replacement of AT27C512R.
For engineers reviewing the AT27LV512A-90TC datasheet, AT27LV512A-90TC pinout, AT27LV512A-90TC application, or AT27LV512A-90TC equivalent, key selection criteria include dual-voltage operation (3.3V/5V), rapid 100 µs/byte programming, TTL/CMOS I/O compatibility, JEDEC-standard TSOP-28 footprint, and industrial temperature support (−40°C to +85°C).
Technical Context
The AT27LV512A-90TC implements a standard OTP EPROM architecture with two-line control (CE and OE/VPP), supporting both read and rapid programming modes via dedicated VPP voltage (13.0 V). Its address decoding covers A0–A15 for full 64K-byte access, and outputs O0–O7 are fully buffered with TTL-compatible VOH/VOL levels across both supply ranges.
It features integrated product identification (manufacturer code 0x1E, device code 0x0D) accessed via A9 high-voltage enable and A0 toggle, enabling automated programming equipment recognition. Standby mode is activated by CE = VIH, reducing ICC to ≤20 µA (3.6V), while transient suppression requires local 0.1 µF ceramic + 4.7 µF bulk capacitors per device.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288 bits (64K × 8), fixed OTP configuration - no rewrites, suitable for firmware boot code or calibration tables. |
| Read Access Time | 90 ns max at VCC = 3.0–3.6V or 4.5–5.5V - meets timing budgets for 11 MHz bus systems with 2 wait states. |
| Supply Voltage Range | 3.0–3.6V (low-power portable mode) or 4.5–5.5V (legacy 5V system compatibility) - enables dual-voltage board designs. |
| Standby Current | ≤20 µA at VCC = 3.6V (CMOS CE logic) - enables multi-year battery life in always-on embedded monitoring nodes. |
| Programming Speed | 100 µs/byte typical with Rapid™ algorithm - reduces production programming cycle time vs. conventional EPROMs. |
| I/O Compatibility | JEDEC LVTTL-compliant inputs/outputs - interoperates directly with 3.3V and 5V microcontrollers without level shifters. |
| Operating Temperature | −40°C to +85°C (industrial grade) - qualified for automotive body control modules and industrial PLC I/O cards. |
Pinout & Package
AT27LV512A-90TC uses a 28-lead Thin Small Outline Package (TSOP, Type 1, JEDEC MO-153AA), 11.8 × 7.6 mm body, 0.55 mm lead pitch, gull-wing leads. Pin 1 marked by notch or index area; pin 1 is OE/VPP.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OE/VPP | Output Enable / Programming Supply | Active-low read control; during programming, driven to 13.0 V to enable byte programming - requires external VPP switching circuitry. |
| CE | Chip Enable | Active-low chip select - controls device activation and enables bus contention avoidance in multi-device memory maps. |
| A0–A15 | Address Inputs | 16-bit address bus interface - supports full linear addressing of all 64K bytes without banking logic. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus - outputs valid within 90 ns of CE/OE assertion; high-impedance when disabled. |
| VCC | Power Supply | Primary supply input - must be applied simultaneously with or before OE/VPP; decoupling capacitor required per datasheet. |
| GND | Ground Reference | Signal and power return path - requires low-inductance connection adjacent to VCC decoupling capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Operation | Single device supports both 3.3V portable systems and 5V legacy backplanes - eliminates BOM splits for mixed-voltage platforms. |
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - improves manufacturing throughput and reduces programming station dwell time. |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x0D) accessible via A9/A0 - enables automatic algorithm selection in universal programmers. |
| JEDEC-Standard Packages | TSOP-28 (28T) footprint matches industry-standard PCB footprints - allows drop-in replacement of other 28-pin EPROMs. |
| High-Reliability CMOS | 2000V ESD protection and 200 mA latchup immunity - ensures robustness in handling and field-deployed industrial environments. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Boot ROM |
|---|---|
Use Scenario: Non-volatile storage of ladder logic firmware and I/O configuration in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Primary boot-time instruction memory mapped to CPU address space; accessed during cold start and firmware updates. Use Value: Industrial temperature rating (−40°C to +85°C) and 200 mA latchup immunity ensure reliable operation in electrically noisy factory environments. |
Use Scenario: Fixed boot code storage for Z80, 8051, or 68K-based embedded controllers in medical instruments and test equipment. IC Role / Device Role / Timing Role: Read-only memory providing reset vector and initialization routines; accessed at power-up before RAM initialization. Use Value: 90 ns access time meets timing requirements of 8–12 MHz CPU buses; dual-voltage support simplifies design reuse across 3.3V and 5V product variants. |
| Portable Data Logger Memory | Automotive Body Control Module |
Use Scenario: Battery-backed firmware and calibration table storage in handheld environmental sensors and field data recorders. IC Role / Device Role / Timing Role: Low-power OTP memory holding sensor driver code and compensation coefficients; remains active during sleep cycles. Use Value: ≤20 µA standby current at 3.6V extends coin-cell or Li-ion battery life to >5 years in low-duty-cycle deployments. |
Use Scenario: Immobilizer key authentication lookup table and lighting control logic in vehicle door modules and junction boxes. IC Role / Device Role / Timing Role: Secure, unalterable storage of cryptographic keys and state-machine logic; accessed only during ignition sequence. Use Value: 2000V HBM ESD rating withstands assembly handling and in-vehicle electrostatic discharge events per ISO 10605. |
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 | 5V-only operation (4.5–5.5V); no 3.3V support; same 90 ns speed and 28-pin PDIP package. | Requires dedicated 5V rail; unsuitable for mixed-voltage or battery-operated systems. | Select when legacy 5V-only design mandates PDIP through-hole mounting and no low-voltage requirement exists. |
| MX29LV512CTI-90G | 3.0–3.6V flash memory (not OTP); 100K write/erase cycles; software-controlled sector erase; 28-pin TSOP. | Field-upgradable firmware; higher endurance but longer write latency and complex command protocol. | Select when firmware updates in the field are required; not suitable for true one-time-programmed security-critical applications. |
Compared with AT27C512R-90PC, the AT27LV512A-90TC adds 3.3V operation and TSOP packaging but removes PDIP option; compared with MX29LV512CTI-90G, it trades reprogrammability for guaranteed immutability, simpler interface, and lower cost in volume production.
Availability
AT27LV512A-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller boot ROM, and portable data logger memory requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AT27LV512A-90TC 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 manufacturer specializing in microcontrollers, non-volatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV512A belongs to Atmel's low-voltage OTP EPROM product line, designed specifically for battery-powered and dual-voltage embedded systems needing reliable, low-power, pin-compatible replacements for legacy 5V EPROMs.
FAQ
What is the maximum operating voltage for AT27LV512A-90TC during normal read operation?
The AT27LV512A-90TC supports two distinct read voltage ranges: 3.0V to 3.6V for low-power operation and 4.5V to 5.5V for standard 5V system compatibility. It must not be operated outside these ranges during read mode; VCC = 6.5V is only permitted during programming, not read operation.
Does AT27LV512A-90TC support in-system programming?
No, the AT27LV512A-90TC is a one-time programmable EPROM and requires external parallel programming equipment. It does not support in-system programming (ISP) or serial interfaces. Programming must be performed before soldering using a dedicated EPROM programmer that supplies 13.0 V to OE/VPP and 6.5 V to VCC.
What is the function of the OE/VPP pin on AT27LV512A-90TC?
The OE/VPP pin on AT27LV512A-90TC serves dual functions: as Output Enable (active-low) during read mode, and as the Programming Supply voltage input (13.0 V) during programming. During read, it must be held low (VIL) to enable outputs; during programming, it must be driven to 13.0 V while CE is pulsed.
Is AT27LV512A-90TC pin-compatible with AT27C512R-90JC?
Yes, the AT27LV512A-90TC is pin-compatible with the AT27C512R family in matching packages (e.g., TSOP-28 ↔ SOIC-28), sharing identical pin functions, address/data mapping, and two-line control (CE/OE). However, AT27LV512A-90TC adds 3.3V operation and requires different programming voltages.
What decoupling capacitance is required for stable operation of AT27LV512A-90TC?
The AT27LV512A-90TC requires a minimum 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, located as close as possible to the device pins. For systems with multiple EPROMs, a 4.7 µF bulk electrolytic capacitor should also be added near the power entry point to stabilize the supply rail.
AT27LV512A-90TC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-TSOP
AT27LV512A-90TC FAQ
1.How can I place an order for AT27LV512A-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-90TC 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-90TC reliable?
The price and inventory of AT27LV512A-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-90TC is usually 5 days.
3.What payment methods are accepted for AT27LV512A-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-90TC?
AT27LV512A-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-90TC 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-90TC?
For technical support, including AT27LV512A-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-90TC requirements.
6.How does Aetrix verify that AT27LV512A-90TC is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-90TC 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-90TC meets industry standards.
7.What is the process for return or replacement of AT27LV512A-90TC?
All AT27LV512A-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-90TC, 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-90TC part is unused and in its original packaging.
Return procedure for AT27LV512A-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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