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Microchip Technology AT27LV040A-90JC
- Part No.:
- AT27LV040A-90JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT27LV040A-90JC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:4,437
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Product details
Overview
AT27LV040A-90JC from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM with 90 ns read access time, dual-voltage operation (3.0–3.6 V or 4.5–5.5 V), and JEDEC-standard 32-lead PLCC packaging. It delivers TTL-compatible outputs at 3.0 V and supports rapid programming at 100 µs/byte, making it suitable for battery-powered portable systems requiring low-power nonvolatile storage.
For engineers reviewing the AT27LV040A-90JC datasheet, AT27LV040A-90JC pinout, AT27LV040A-90JC application, or AT27LV040A-90JC equivalent, key selection criteria include its 90 ns access time at 3.3 V, <1 µA typical standby current, JEDEC-compatibility with AT27C040, PLCC package mechanical footprint, and OTP reliability in industrial temperature range (–40°C to +85°C).
Technical Context
The AT27LV040A-90JC implements a CMOS-based OTP EPROM architecture with two-line control (CE/OE), enabling bus contention avoidance in shared-memory systems. Its dual-supply design allows seamless integration into mixed-voltage platforms-operating at 3.3 V for low power or 5 V for legacy compatibility.
It features Rapid™ programming with 100 µs/byte typical pulse width, integrated product identification code (Manufacturer ID = 0x1E, Device ID = 0x0B), and robust ESD protection (2,000 V) and latchup immunity (200 mA). Programming requires VCC = 6.5 V and VPP = 13.0 V, while read mode operates within strict 3.0–3.6 V or 4.5–5.5 V rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8), fixed OTP configuration - no rewrites, ideal for firmware boot code storage. |
| Read Access Time | 90 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 dual-voltage system designs and hot-plug compatibility across 3V/5V hosts. |
| Standby Current | 20 µA max (CMOS CE), <1 µA typical at 3.3 V - critical for battery-backed applications with extended sleep cycles. |
| Active Power Dissipation | 36 mW max at 5 MHz and VCC = 3.6 V - less than half the power of comparable 5V EPROMs, reducing thermal load. |
| Programming Speed | 100 µs/byte typical - accelerates production programming and reduces test time in high-volume manufacturing. |
| Operating Temperature | –40°C to +85°C (industrial grade) - validated for use in automotive control modules and industrial PLCs. |
Pinout & Package
AT27LV040A-90JC is housed in a 32-lead Plastic Leaded Chip Carrier (PLCC), JEDEC MS-016 AE compliant, with 1.27 mm pitch and 1.20 mm max body height. The package is surface-mount compatible and designed for reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0 least significant, A18 most significant. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus (output-only in read mode); TTL-compatible drive strength at 3.0 V. |
| CE | Chip Enable | Active-low global enable; controls device activation and entry to standby mode when high. |
| OE | Output Enable | Active-low output gate; enables data bus drivers independently of CE for bus sharing. |
| VCC | Power Supply | Primary supply pin; must be applied simultaneously with or before VPP during programming. |
| VPP | Programming Voltage | 13.0 V ± 0.25 V input required only during programming; decoupled via 0.1 µF capacitor to ground. |
| GND | Ground Reference | Signal and power return; requires local 0.1 µF ceramic decoupling per device. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-voltage read operation | Operates reliably at either 3.3 V (low power) or 5 V (legacy compatibility), eliminating level-shifter requirements. |
| Rapid™ programming algorithm | 100 µs/byte typical programming pulse width with built-in verify-reprogram loop ensures field-proven write reliability. |
| Integrated product identification code | Electronic Manufacturer ID (0x1E) and Device Code (0x0B) accessible via A9/VH and A0 toggle - enables auto-detection in universal programmers. |
| JEDEC AT27C040 compatibility | Pin-, function-, and programming-equivalent to AT27C040 - allows drop-in replacement in existing 5V designs with voltage scaling. |
| High-reliability process | 2,000 V HBM ESD rating and 200 mA latchup immunity support rugged deployment in noisy industrial environments. |
Applications
| Industrial Control Firmware Storage | Embedded Boot ROM for Microcontrollers |
|---|---|
Use Scenario: Storing immutable boot firmware in programmable logic controllers (PLCs) operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup sequence; accessed during cold reset before RAM initialization. Use Value: Industrial temperature rating (–40°C to +85°C) and 200 mA latchup immunity ensure reliable operation amid motor-drive EMI and power transients. |
Use Scenario: Hosting initial bootloader code for 8-bit and 16-bit MCUs in medical diagnostic devices where firmware integrity is safety-critical. IC Role / Device Role / Timing Role: Read-only execution memory mapped at reset vector; delivers 90 ns access to minimize boot latency. Use Value: <1 µA typical standby current extends battery life in portable diagnostics; OTP prevents accidental corruption during field updates. |
| Legacy System Upgrade Module | Portable Data Logger Memory |
Use Scenario: Retrofitting aging 5V industrial instrumentation with low-power 3.3V operation while retaining existing PCB layout and firmware. IC Role / Device Role / Timing Role: Pin- and function-compatible replacement for AT27C040; operates identically under 5V but adds 3.3V option. Use Value: Dual-voltage support enables gradual migration path - same footprint, same programming equipment, lower system power draw. |
Use Scenario: Capturing sensor data in handheld environmental monitors powered by coin-cell batteries for multi-week deployments. IC Role / Device Role / Timing Role: Low-quiescent nonvolatile storage holding calibration tables and firmware; accessed intermittently during wake cycles. Use Value: 20 µA max standby current and 3.0 V minimum supply extend operational life; PLCC package withstands repeated field handling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-90PC | 5V-only operation (4.5–5.5 V), no 3.3V support; identical 90 ns speed and PLCC-32 package. | Requires external 5V rail; unsuitable for battery-powered or mixed-voltage systems. | Select when legacy 5V infrastructure is fixed and power efficiency is secondary. |
| MX29LV400CBTI-90G | Flash-based (reprogrammable), 3.0–3.6 V only, 48-pin TSOP; lacks VPP pin and OTP security model. | Enables firmware updates in-field but introduces erase-cycle wear-out and higher complexity. | Select when field-upgradable code is required and OTP immutability is not mandated. |
Compared with AT27C040-90PC, the AT27LV040A-90JC adds 3.3V operation and lower standby power; compared with MX29LV400CBTI-90G, it offers OTP tamper resistance and simpler programming infrastructure, at the cost of reprogrammability.
Availability
AT27LV040A-90JC is available at Aetrix Electronics and suitable for industrial control firmware storage, embedded boot ROM for microcontrollers, and legacy system upgrade modules requiring stable component supply, long-term lifecycle assurance, and JEDEC-standard PLCC compatibility.
Supply support for AT27LV040A-90JC 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 AT27LV040A-90JC belongs to Atmel's low-voltage OTP EPROM product line, engineered for energy-constrained portable and industrial systems needing secure, unalterable firmware storage with minimal power overhead.
FAQ
What is the maximum operating voltage for AT27LV040A-90JC during normal read operation?
The AT27LV040A-90JC supports two distinct read voltage ranges: 3.0 V to 3.6 V for low-power operation, and 4.5 V to 5.5 V for standard 5V compatibility. Operation outside these ranges - including at exactly 3.7 V or 4.4 V - is not specified and may result in unreliable timing or data integrity. The AT27LV040A-90JC must not be operated at intermediate voltages between the two defined bands.
Does AT27LV040A-90JC require a separate programming voltage supply?
Yes, the AT27LV040A-90JC requires VPP = 13.0 V ± 0.25 V applied to the dedicated VPP pin during programming. This voltage is strictly isolated from VCC during programming; VCC must be set to 6.5 V ± 0.25 V. During normal read operation, VPP is tied to VCC. The AT27LV040A-90JC datasheet mandates a 0.1 µF capacitor between VPP and GND to suppress transients.
Is AT27LV040A-90JC pin-compatible with AT27C040-90PC?
Yes, the AT27LV040A-90JC is pin-compatible and functionally equivalent to AT27C040-90PC in PLCC-32 packaging, including identical pinout, signal definitions, and timing behavior at 5V. However, the AT27LV040A-90JC adds 3.3V operation and lower power consumption - no PCB changes are needed for substitution in existing AT27C040-90PC layouts.
What is the purpose of the Integrated Product Identification Code in AT27LV040A-90JC?
The Integrated Product Identification Code in the AT27LV040A-90JC provides electronic manufacturer (0x1E) and device type (0x0B) codes readable via A9 and A0 pins under specific voltage conditions. This allows universal programmers to auto-detect the AT27LV040A-90JC and select correct algorithms and voltages - eliminating manual part selection errors during high-volume programming.
Can AT27LV040A-90JC operate reliably at 3.0 V with full 90 ns access time?
Yes, the AT27LV040A-90JC guarantees 90 ns maximum access time across its entire 3.0–3.6 V supply range, including at the minimum 3.0 V rail. This is confirmed in the AC Characteristics table for AT27LV040A-90 devices. The AT27LV040A-90JC maintains TTL-level output compatibility even at 3.0 V, ensuring interoperability with 5V logic families without level shifters.
AT27LV040A-90JC 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:
- 4Mbit
- Memory Organization:
- 512K 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:
- 32-PLCC (13.97x11.43)
AT27LV040A-90JC FAQ
1.How can I place an order for AT27LV040A-90JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-90JC 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 AT27LV040A-90JC reliable?
The price and inventory of AT27LV040A-90JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-90JC is usually 5 days.
3.What payment methods are accepted for AT27LV040A-90JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-90JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-90JC?
AT27LV040A-90JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-90JC 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 AT27LV040A-90JC?
For technical support, including AT27LV040A-90JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-90JC requirements.
6.How does Aetrix verify that AT27LV040A-90JC is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-90JC 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 AT27LV040A-90JC meets industry standards.
7.What is the process for return or replacement of AT27LV040A-90JC?
All AT27LV040A-90JC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-90JC, 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 AT27LV040A-90JC part is unused and in its original packaging.
Return procedure for AT27LV040A-90JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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