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Microchip Technology AT27LV512A-70JI
- Part No.:
- AT27LV512A-70JI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV512A-70JI.pdf
- Description:
- IC EPROM 512KBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,414
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Product details
Overview
AT27LV512A-70JI 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 70 ns read access time, 20 µA max standby current at VCC = 3.6V, and JEDEC-standard 32-lead PLCC 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-70JI datasheet, AT27LV512A-70JI pinout, AT27LV512A-70JI application, or AT27LV512A-70JI equivalent, key selection criteria include dual-voltage support (3.3V/5V), industrial temperature range (−40°C to +85°C), rapid programming (100 µs/byte), JEDEC-compatibility with AT27C512R, and CMOS/TTL I/O compatibility for mixed-supply system integration.
Technical Context
The AT27LV512A-70JI implements a single-supply OTP EPROM architecture with two-line control (CE and OE/VPP), enabling bus contention prevention in multi-device systems. Its Rapid™ programming algorithm uses 100 µs CE pulses at VCC = 6.5V and OE/VPP = 13.0V, with verification loops per byte and up to 10 reprogramming attempts on failure.
It supports product identification via A9 = 12.0V and A0 toggling to select manufacturer (0x1E) or device code (0x0D) bytes - identical to AT27C512R - ensuring compatibility with standard programming equipment. Input/output levels meet LVTTL standards, and outputs remain TTL-compatible even when VCC = 3.0V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 524,288-bit (64K × 8) OTP EPROM - fixed, non-erasable program storage for firmware boot or configuration data |
| Read Access Time | 70 ns maximum - enables direct execution from memory in high-speed microcontroller systems without wait states |
| Supply Voltage Range | 3.0V–3.6V or 4.5V–5.5V - supports dual-voltage host systems and battery-powered designs with 3.3V rails |
| Standby Current | 20 µA max at VCC = 3.6V - reduces power consumption by >80% vs. 5V EPROMs in sleep modes |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including motor controls and instrumentation |
| Programming Voltage | VCC = 6.5V ± 0.25V, OE/VPP = 13.0V ± 0.25V - requires dedicated programming hardware; not field-reprogrammable |
| ESD Protection | 2,000V HBM - enhances robustness during handling and PCB assembly in manufacturing |
Pinout & Package
AT27LV512A-70JI is supplied in a 32-lead Plastic J-Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE. Pins 1 and 17 are no-connect (NC) and must remain unconnected in layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus interface; selects one of 64K bytes during read or program operations |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus; outputs valid data during read mode, high-impedance otherwise |
| CE | Chip Enable | Active-low global enable; disables outputs and reduces current draw when high (standby) |
| OE/VPP | Output Enable / Program Supply | Low during read (enables output drivers); high at 13.0V during programming (supplies VPP) |
| VCC | Power Supply | Primary supply input; accepts 3.0–3.6V or 4.5–5.5V; must be applied before/with OE/VPP |
| GND | Ground | Reference return path for all signals and power; requires local 0.1 µF ceramic decoupling |
| NC (Pins 1, 17) | No Connect | Unbonded pins; must be left floating - no routing or soldering permitted |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Read Operation | Operates natively at 3.0–3.6V or 4.5–5.5V - eliminates level-shifting in mixed-supply embedded systems |
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with automatic verify-and-retry - reduces production programming cycle time |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x0D) accessible via A9 = 12.0V and A0 toggle - ensures correct algorithm selection in automated programmers |
| JEDEC-Compatible Pinout | Pin-for-pin compatible with AT27C512R in PLCC/SOIC/TSOP packages - allows drop-in replacement in legacy 5V designs |
| CMOS/TTL I/O Compatibility | Inputs accept TTL thresholds; outputs drive TTL loads at 3.0V VCC - interoperable with both 3.3V and 5V logic families |
Applications
| Industrial Control Firmware Storage | Portable Medical Device Boot ROM |
|---|---|
|
Use Scenario: Storing immutable firmware for PLC I/O modules operating in −40°C to +85°C ambient environments. IC Role / Device Role / Timing Role: Non-volatile boot code storage with fast 70 ns access to support deterministic real-time startup. Use Value: Eliminates need for external voltage translators due to native 3.3V/5V dual-supply operation and TTL-compatible outputs. |
Use Scenario: Holding calibration constants and safety-critical boot routines in handheld ECG monitors powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-power OTP EPROM providing secure, tamper-resistant program storage during battery-only operation. Use Value: 20 µA max standby current extends battery life; 3.0V minimum VCC enables direct connection to regulated 3.3V rails. |
| Legacy System Upgrade Path | Automotive Diagnostic Tool Memory |
|
Use Scenario: Replacing obsolete AT27C512R in existing 5V industrial controllers while retaining PCB layout and programming infrastructure. IC Role / Device Role / Timing Role: Pin-compatible OTP EPROM with identical timing and programming protocol to AT27C512R. Use Value: No PCB redesign required; same programming equipment and algorithms apply - reduces qualification time and cost. |
Use Scenario: Storing diagnostic firmware and vehicle protocol stacks in OBD-II scan tools used across multiple vehicle makes. IC Role / Device Role / Timing Role: Industrial-grade OTP memory supporting wide-temperature operation and ESD-hardened I/O for workshop environments. Use Value: 2,000V HBM ESD rating prevents field failures during technician handling; −40°C to +85°C range covers under-hood and garage conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C512R-70JC | 5V-only operation (4.5–5.5V); no 3.3V support; identical 70 ns access, PLCC package, and pinout | Requires 5V supply rail; unsuitable for battery-powered or mixed-voltage systems | Select when legacy 5V-only design mandates strict voltage compliance and no low-power requirement exists |
| MX29LV512CTI-70G | 3.3V-only flash memory (not OTP); 70 ns access; 28-pin TSOP; supports erase/rewrite; higher endurance | Field-upgradable firmware capability; incompatible programming method and voltage requirements | Select when firmware updates are needed post-deployment; not suitable for one-time secure boot image storage |
Compared with AT27C512R-70JC, AT27LV512A-70JI adds 3.3V operation and lower standby power but retains full pin and programming compatibility; compared with MX29LV512CTI-70G, it offers true one-time programmability and simpler programming infrastructure but lacks rewrite capability.
Availability
AT27LV512A-70JI is available at Aetrix Electronics and suitable for industrial control firmware storage, portable medical device boot ROM, and legacy system upgrade paths requiring stable component supply, long-term lifecycle assurance, and industrial temperature qualification.
Supply support for AT27LV512A-70JI 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 security ICs for embedded and industrial applications.
The AT27LV512A-70JI belongs to Atmel's low-voltage OTP EPROM product line, designed specifically for portable, battery-operated, and dual-supply embedded systems needing reliable, low-power, non-erasable program storage.
FAQ
What is the operating temperature range for AT27LV512A-70JI?
The AT27LV512A-70JI 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. The 'I' suffix in AT27LV512A-70JI explicitly denotes industrial grade, distinguishing it from commercial-grade variants like AT27LV512A-70JC. This range ensures reliable performance in demanding environments such as factory automation and outdoor instrumentation where thermal stability is critical. AT27LV512A-70JI maintains full electrical specifications across this entire range.
Does AT27LV512A-70JI support 3.3V-only operation?
Yes, AT27LV512A-70JI supports true 3.3V-only operation with VCC specified from 3.0V to 3.6V for read mode. It delivers 70 ns access time and TTL-compatible outputs even at 3.0V, enabling direct interfacing with 3.3V logic without level shifters. However, programming requires VCC = 6.5V and OE/VPP = 13.0V - so while read operation is fully 3.3V-native, programming remains a separate high-voltage process. AT27LV512A-70JI does not require a 5V rail for normal operation.
Is AT27LV512A-70JI pin-compatible with AT27C512R?
Yes, AT27LV512A-70JI is JEDEC-standard pin-compatible with AT27C512R in all supported packages (PLCC, SOIC, TSOP). The datasheet explicitly states compatibility and confirms identical pin functions, timing parameters, and programming protocols. This allows AT27LV512A-70JI to serve as a drop-in replacement in existing AT27C512R designs - retaining the same PCB layout, firmware, and programming equipment - while adding 3.3V operation and lower power. AT27LV512A-70JI maintains full functional equivalence in read and program modes.
What programming voltage is required for AT27LV512A-70JI?
AT27LV512A-70JI requires VCC = 6.5V ± 0.25V and OE/VPP = 13.0V ± 0.25V during programming, as specified in the DC Programming Characteristics table. These voltages are mandatory for reliable byte programming using the Rapid™ algorithm. The device cannot be programmed at its normal read supply voltages (3.0–3.6V or 4.5–5.5V). Programming must be performed using industry-standard EPROM programmers capable of delivering these precise high-voltage conditions. AT27LV512A-70JI is not field-programmable under normal system power.
Can AT27LV512A-70JI be used in battery-powered devices?
Yes, AT27LV512A-70JI is specifically optimized for battery-powered devices. Its 3.0V minimum read supply enables direct connection to single-cell Li-ion or 3×AA alkaline configurations. With only 20 µA max standby current at 3.6V and 8 mA active current at 5 MHz, it minimizes quiescent drain - extending operational life significantly versus 5V EPROMs. The datasheet highlights "ideal for fast, portable systems using battery power" as a core design goal. AT27LV512A-70JI delivers both performance and energy efficiency in mobile applications.
AT27LV512A-70JI 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:
- 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:
- 32-PLCC (13.97x11.43)
AT27LV512A-70JI FAQ
1.How can I place an order for AT27LV512A-70JI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV512A-70JI 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-70JI reliable?
The price and inventory of AT27LV512A-70JI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV512A-70JI is usually 5 days.
3.What payment methods are accepted for AT27LV512A-70JI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV512A-70JI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV512A-70JI?
AT27LV512A-70JI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV512A-70JI 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-70JI?
For technical support, including AT27LV512A-70JI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV512A-70JI requirements.
6.How does Aetrix verify that AT27LV512A-70JI is sourced from the original manufacturer or authorized distributors?
All AT27LV512A-70JI 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-70JI meets industry standards.
7.What is the process for return or replacement of AT27LV512A-70JI?
All AT27LV512A-70JI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV512A-70JI, 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-70JI part is unused and in its original packaging.
Return procedure for AT27LV512A-70JI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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