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Microchip Technology AT27LV040A-12VI
- Part No.:
- AT27LV040A-12VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27LV040A-12VI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:112
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Product details
Overview
AT27LV040A-12VI from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM optimized for low-voltage portable systems, featuring 120 ns read access time at 3.0–3.6 V or 4.5–5.5 V, <20 µA standby current, and JEDEC-standard 32-lead PLCC/TSOP/VSOP packaging. It serves as nonvolatile program storage in battery-powered embedded controllers and legacy industrial firmware modules.
For engineers reviewing the AT27LV040A-12VI datasheet, AT27LV040A-12VI pinout, AT27LV040A-12VI application, or AT27LV040A-12VI equivalent, key selection criteria include dual-voltage operation (3.3 V / 5 V), OTP reliability for fixed firmware, rapid 100 µs/byte programming, TTL/CMOS I/O compatibility, and industrial temperature support (−40°C to +85°C).
Technical Context
The AT27LV040A-12VI implements a standard OTP EPROM architecture with two-line control (CE and OE), enabling bus contention avoidance in multi-device memory subsystems. Its address space spans A0–A18 (19-bit), supporting full 512K-byte decoding without external logic.
It operates in three distinct voltage regimes: low-voltage read (3.0–3.6 V), standard 5 V read (4.5–5.5 V), and high-voltage programming (VCC = 6.5 V, VPP = 13.0 V). Output levels meet LVTTL standards at 3.3 V and remain compatible with 5 V TTL loads, verified by VOH ≥ 2.4 V at IOH = −2.0 mA and VOL ≤ 0.4 V at IOL = 2.0 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8) - supports full firmware images for 8-bit microcontrollers without bank switching. |
| Read Access Time | 120 ns max at VCC = 3.0–3.6 V - enables direct interface with 8 MHz Z80 or 6502 derivatives without wait states. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - allows seamless integration into mixed-supply systems and hot-pluggable card designs. |
| Standby Current | 20 µA max at VCC = 3.6 V - extends battery life in portable instrumentation and remote sensor nodes. |
| Programming Speed | 100 µs/byte typical - reduces production programming cycle time versus legacy 5 V EPROMs by >5×. |
| I/O Compatibility | JEDEC LVTTL - ensures interoperability with standard logic families without level-shifting circuitry. |
| Operating Temperature | −40°C to +85°C - qualified for deployment in industrial automation and automotive under-hood ECUs. |
Pinout & Package
AT27LV040A-12VI is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016 AE, with lead pitch of 1.27 mm and body size 18.5 × 18.5 mm. Pin 1 is marked by index notch and corner chamfer.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus accepting full 512K-byte linear addressing; no address latching required. |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus in read mode; high-impedance when CE or OE inactive. |
| CE | Chip Enable | Active-low global enable controlling device activation and power state transitions. |
| OE | Output Enable | Active-low output gate independent of CE; enables bus sharing with other peripherals. |
| VCC | Power Supply | Primary supply input supporting dual-voltage operation (3.0–3.6 V or 4.5–5.5 V). |
| VPP | Programming Voltage | 13.0 V programming supply pin; must be ramped synchronously with VCC during write cycles. |
| GND | Ground Reference | Common return path for all digital and programming currents; requires local 0.1 µF ceramic decoupling. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with automatic verify-reprogram loop - eliminates manual rework in high-volume firmware burn-in. |
| Dual-Voltage Read Operation | Single device supports both 3.3 V portable systems and 5 V legacy backplanes - reduces BOM count in multi-platform designs. |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device Code (0x0B) accessible via A9/VH and A0 toggle - enables automated programmer validation and counterfeit detection. |
| ESD & Latchup Robustness | 2,000 V HBM ESD rating and 200 mA latchup immunity - ensures reliability in handling-sensitive manufacturing and field service environments. |
| JEDEC-Standard Packaging | 32-lead PLCC, TSOP, and VSOP footprints - allows drop-in replacement across form factors without PCB redesign. |
Applications
| Industrial PLC Firmware Storage | Legacy Medical Device Boot ROM |
|---|---|
Use Scenario: Storing fixed control logic and calibration tables in programmable logic controller modules operating in factory-floor environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot ROM providing deterministic startup sequence and real-time I/O mapping upon power-up. Use Value: Industrial temperature rating (−40°C to +85°C) and 20 µA standby current ensure uninterrupted operation during brownouts and extended idle periods. |
Use Scenario: Holding immutable diagnostic firmware and safety-critical initialization routines in Class II medical analyzers requiring long-term data integrity and regulatory traceability. IC Role / Device Role / Timing Role: One-time programmable code storage preventing unauthorized runtime modification and ensuring revision-controlled firmware deployment. Use Value: OTP architecture eliminates risk of accidental overwrite; Rapid™ programming enables batch verification during ISO 13485-compliant production release. |
| Automotive Body Control Module | Point-of-Sale Terminal BIOS |
Use Scenario: Hosting vehicle-specific configuration data and lighting control algorithms in under-dash BCMs exposed to thermal cycling and electrical noise. IC Role / Device Role / Timing Role: Read-only memory delivering timing-critical CAN node initialization parameters within 120 ns of address assertion. Use Value: 120 ns tACC and 2,000 V ESD protection maintain functional safety compliance (ISO 26262 ASIL-B) without external protection components. |
Use Scenario: Securing boot firmware and payment protocol stacks in retail POS terminals deployed globally across varying power grid conditions. IC Role / Device Role / Timing Role: Dual-voltage OTP EPROM enabling single hardware SKU to operate on both 3.3 V embedded motherboards and 5 V legacy add-in cards. Use Value: 3.0–3.6 V / 4.5–5.5 V operation eliminates need for separate 3.3 V and 5 V inventory SKUs, simplifying global logistics and field repair. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-12JC | 5 V only operation (4.5–5.5 V); no 3.3 V support; identical 120 ns speed and 512K × 8 organization. | Limited to fixed 5 V systems; unsuitable for battery-powered or mixed-supply designs. | Select when legacy 5 V infrastructure prohibits voltage scaling and cost sensitivity favors mature 5 V OTP stock. |
| MX29LV400CBTI-12G | Flash-based (reprogrammable), 3.0–3.6 V only, 120 ns access, 512K × 8 but with sector erase architecture. | Supports field firmware updates; lacks OTP permanence and requires command sequencing. | Choose when design requires post-deployment patching; avoid if absolute write-protection and zero-risk corruption are mandatory. |
Compared with AT27C040-12JC, the AT27LV040A-12VI adds 3.3 V operation and lower standby power, while MX29LV400CBTI-12G trades OTP immutability for reprogrammability-making AT27LV040A-12VI optimal for cost-sensitive, battery-aware, and safety-critical fixed-code deployments.
Availability
AT27LV040A-12VI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, automotive body electronics, and point-of-sale terminal designs requiring stable component supply and long-lifecycle support.
Supply support for AT27LV040A-12VI 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 was a U.S.-based semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs before its acquisition by Microchip Technology in 2016.
The AT27LV040A-12VI belongs to Atmel's low-voltage OTP EPROM product line, engineered for portable and mixed-voltage embedded systems where firmware permanence, low-power operation, and JEDEC footprint compatibility are essential.
FAQ
What voltage ranges does the AT27LV040A-12VI support for normal read operation?
The AT27LV040A-12VI supports two distinct read voltage ranges: 3.0 V to 3.6 V for low-power portable applications and 4.5 V to 5.5 V for compatibility with legacy 5 V systems. Both ranges deliver guaranteed 120 ns access time. Programming requires separate VCC = 6.5 V and VPP = 13.0 V supplies, which are not used during read mode.
Is the AT27LV040A-12VI pin-compatible with the AT27C040 series?
Yes, the AT27LV040A-12VI is fully pin-compatible with the AT27C040 family across all JEDEC-standard packages (PLCC, TSOP, VSOP), sharing identical pin functions, layout, and signal timing. This allows direct substitution in existing 5 V designs while adding 3.3 V capability-no PCB changes are needed when upgrading to AT27LV040A-12VI.
What is the purpose of the VPP pin on the AT27LV040A-12VI?
The VPP pin on the AT27LV040A-12VI supplies 13.0 V during programming operations to enable Fowler-Nordheim tunneling into the floating gate. It is unused during read or standby modes. The datasheet mandates that VPP must be applied simultaneously with or after VCC and removed simultaneously with or before VCC to prevent device stress or data corruption.
Does the AT27LV040A-12VI support industrial temperature operation?
Yes, the AT27LV040A-12VI is rated for industrial temperature operation from −40°C to +85°C, as confirmed by the "I" suffix in its ordering code (AT27LV040A-12VI) and validated across all electrical parameters in the datasheet's AC/DC characteristics tables. This makes it suitable for deployment in harsh-environment control systems without derating.
How does the Integrated Product Identification Code function on the AT27LV040A-12VI?
The AT27LV040A-12VI implements an electronic ID code accessible via A9 and A0: applying VH (12.0 V) to A9 and toggling A0 selects either the Manufacturer ID (0x1E) or Device Code (0x0B) on O7–O0. This feature enables automated programming equipment to validate part authenticity and select correct algorithms-critical for high-yield manufacturing of AT27LV040A-12VI units.
AT27LV040A-12VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- Product Status:
- Active
- 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:
- 120 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-VSOP
AT27LV040A-12VI FAQ
1.How can I place an order for AT27LV040A-12VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-12VI 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-12VI reliable?
The price and inventory of AT27LV040A-12VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-12VI is usually 5 days.
3.What payment methods are accepted for AT27LV040A-12VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-12VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-12VI?
AT27LV040A-12VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-12VI 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-12VI?
For technical support, including AT27LV040A-12VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-12VI requirements.
6.How does Aetrix verify that AT27LV040A-12VI is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-12VI 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-12VI meets industry standards.
7.What is the process for return or replacement of AT27LV040A-12VI?
All AT27LV040A-12VI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-12VI, 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-12VI part is unused and in its original packaging.
Return procedure for AT27LV040A-12VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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