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Microchip Technology AT27LV040A-15VI
- Part No.:
- AT27LV040A-15VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27LV040A-15VI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,937
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Product details
Overview
AT27LV040A-15VI from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM optimized for low-voltage, battery-powered systems. It operates from a single 3.0–3.6V supply (or 4.5–5.5V), delivers 150 ns read access time, draws ≤20 µA standby current at VCC = 3.6V, and supports JEDEC-standard PLCC/TSOP/VSOP packages - enabling use in portable industrial controllers and legacy embedded boot memory.
For engineers reviewing the AT27LV040A-15VI datasheet, AT27LV040A-15VI pinout, AT27LV040A-15VI application, or AT27LV040A-15VI equivalent, key selection criteria include dual-voltage compatibility (3.3V/5V), OTP reliability for firmware storage, rapid 100 µs/byte programming, TTL/CMOS I/O compatibility, and industrial temperature range (-40°C to +85°C) support.
Technical Context
The AT27LV040A-15VI implements a standard OTP EPROM architecture with two-line control (CE/OE), no internal refresh or write-enable logic, and address decoding for 19-bit A0–A18 inputs. Its output drivers meet LVTTL voltage thresholds (VOH ≥ 2.4V at IOH = −2.0 mA, VOL ≤ 0.4V at IOL = 2.0 mA) under both 3.3V and 5V operation.
Programming requires VCC = 6.5V and VPP = 13.0V with a 100 µs CE pulse width; product identification uses A9 = 12.0V and A0 toggling to select manufacturer (0x1E) or device code (0x0B). Standby mode is activated by CE = VIH, yielding <1 µA typical ICC at 3.3V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8) - fixed boot code or configuration storage capacity |
| Read Access Time | 150 ns max at VCC = 3.0–3.6V - defines minimum bus cycle timing for 3.3V host systems |
| Supply Voltage Range | 3.0–3.6V or 4.5–5.5V - enables dual-voltage board design without level shifters |
| Standby Current | 20 µA max at VCC = 3.6V - enables multi-year battery life in always-on embedded devices |
| Active Power Dissipation | 36 mW max at 5 MHz / VCC = 3.6V - reduces thermal load vs. 5V EPROMs in compact enclosures |
| Programming Speed | 100 µs/byte typical - cuts firmware update time during manufacturing programming |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade environmental stress without derating |
Pinout & Package
AT27LV040A-15VI is packaged in a 32-lead PLCC (JEDEC MS-016 AE), with lead pitch 1.27 mm and body size 18.5 × 18.5 mm. Pin 1 is marked by index notch; package is RoHS-compliant and socket-compatible with industry-standard PLCC sockets.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit parallel address bus; fully decoded internally to select one of 524,288 bytes |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus (output only); TTL-compatible VOH/VOL levels at 3.3V or 5V |
| CE | Chip Enable | Active-low global enable; controls power state transition between active and standby modes |
| OE | Output Enable | Active-low output gate; allows bus sharing without external tri-state logic |
| VCC | Power Supply | Main supply input (3.0–3.6V or 4.5–5.5V); must be applied before/with VPP during programming |
| VPP | Programming Voltage | 13.0V programming supply; requires external 0.1 µF capacitor to ground per datasheet |
| GND | Ground Reference | Signal and power return; decoupling capacitor must connect directly between VCC and GND pins |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time - reduces production line throughput time vs. legacy EPROMs |
| Dual-Voltage Read Operation | Single supply supports both 3.3V and 5V host interfaces - eliminates need for voltage translators on mixed-voltage boards |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device Code (0x0B) accessible via A9/A0 - enables automated programmer recognition and algorithm selection |
| JEDEC-Compatible Packages | 32-lead PLCC, TSOP, and VSOP footprints - ensures drop-in replacement capability across legacy designs |
| High-Reliability CMOS Process | 2,000V ESD protection and 200 mA latchup immunity - improves field robustness in uncontrolled handling environments |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Boot ROM |
|---|---|
|
Use Scenario: Non-volatile storage of ladder logic firmware in DIN-rail mounted programmable logic controllers operating in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Primary boot memory holding initialization code executed at power-up; accessed via 8-bit ISA-style bus with 150 ns timing margin. Use Value: Industrial temperature rating (−40°C to +85°C) and 20 µA standby current ensure reliable cold-start and low-power sleep operation without backup batteries. |
Use Scenario: Replacement boot ROM in early Pentium-class motherboards where original AT27C040 sockets remain populated but require lower power and 3.3V compatibility. IC Role / Device Role / Timing Role: Static read-only memory mapped at 0xFFFF0–0xFFFFF; accessed using standard CE/OE control with 150 ns tACC compliance. Use Value: Pin- and function-compatible with AT27C040 while reducing system power draw by >50% at 3.3V operation. |
| Portable Medical Device Configuration | Automated Test Equipment (ATE) Calibration Data |
|
Use Scenario: Storing calibration constants and safety-critical startup parameters in handheld diagnostic tools powered by Li-ion batteries with limited capacity. IC Role / Device Role / Timing Role: OTP memory holding immutable device-specific coefficients; read once at boot, then held in standby until next power cycle. Use Value: Sub-1 µA typical standby current extends battery life beyond 5 years in shelf-storage mode. |
Use Scenario: Permanent storage of sensor offset/gain tables and test sequence definitions in rack-mounted ATE platforms requiring long-term data integrity. IC Role / Device Role / Timing Role: Read-only configuration store accessed over parallel bus during self-test initialization; no runtime writes required. Use Value: High-reliability CMOS process (2,000V ESD, 200 mA latchup immunity) prevents corruption during frequent probe contact events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-15JC | 5V-only operation (4.5–5.5V); no 3.3V support; identical 150 ns tACC and PLCC package | Lacks dual-voltage flexibility; unsuitable for battery-powered or mixed-supply systems | Select when board already uses 5V rails and legacy compatibility outweighs power savings |
| MX29LV400CBTI-15G | Flash-based (not OTP); supports erase/write cycles; 3.3V-only; different pinout (48-pin TSOP) | Enables field firmware updates but requires redesign of PCB layout and programming infrastructure | Choose only if reprogrammability is mandatory and board revision is feasible |
Compared with AT27C040-15JC, the AT27LV040A-15VI adds 3.3V operation and cuts standby current by 90%, while MX29LV400CBTI-15G trades OTP permanence for field-upgradability at the cost of pin incompatibility and higher complexity.
Availability
AT27LV040A-15VI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy PC BIOS replacement, portable medical device configuration, and automated test equipment calibration data requiring stable component supply across extended product lifecycles.
Supply support for AT27LV040A-15VI 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, non-volatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV040A-15VI belongs to Atmel's low-voltage OTP EPROM product line, designed specifically to replace 5V EPROMs in power-constrained and dual-voltage embedded systems while maintaining full JEDEC pin and functional compatibility.
FAQ
What voltage ranges does the AT27LV040A-15VI support during normal read operation?
The AT27LV040A-15VI supports two distinct read voltage ranges: 3.0V to 3.6V (low-voltage mode) and 4.5V to 5.5V (standard 5V mode). It does not operate reliably outside these ranges. During programming, VCC must be raised to 6.5V and VPP to 13.0V - separate from read-mode supplies. The AT27LV040A-15VI maintains TTL-compatible output levels across both read ranges, enabling direct interfacing with mixed-voltage logic families without level translation.
Is the AT27LV040A-15VI pin-compatible with the AT27C040 series?
Yes, the AT27LV040A-15VI is fully pin-compatible and functionally compatible with the AT27C040 family in all JEDEC-standard packages (PLCC, TSOP, VSOP). Address, data, CE, OE, VCC, VPP, and GND pin assignments match exactly. The AT27LV040A-15VI uses identical programming algorithms and equipment as the AT27C040, including the same Rapid™ 100 µs/byte timing and integrated product ID code (0x1E/0x0B), making it a direct drop-in replacement where 3.3V operation or lower power is needed.
What is the maximum standby current specification for the AT27LV040A-15VI?
The maximum standby current for the AT27LV040A-15VI is 20 µA at VCC = 3.6V and TA = 25°C, measured with CE = VCC ± 0.3V (CMOS mode). Typical standby current is less than 1 µA under the same conditions. This ultra-low ICC value enables multi-year battery operation in always-on portable devices. The AT27LV040A-15VI achieves this through optimized CMOS design and strict control of leakage paths - a key differentiator versus older 5V EPROMs that draw hundreds of µA in standby.
Does the AT27LV040A-15VI require external decoupling capacitors, and if so, what values?
Yes, the AT27LV040A-15VI requires two external decoupling capacitors per device: a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND as close as possible to the pins, and a 4.7 µF bulk electrolytic capacitor located near the power entry point for arrays. These are mandatory to suppress transient voltage excursions during CE transitions and stabilize VCC under dynamic load. Failure to implement both capacitors risks non-conformance to datasheet limits and potential data corruption - a requirement explicitly stated in the AT27LV040A-15VI system considerations section.
How is the product identification code accessed on the AT27LV040A-15VI?
The AT27LV040A-15VI product identification code is accessed by setting A9 = 12.0V (VID), holding A1–A18 = VIL, and toggling A0: low (VIL) selects the Manufacturer ID byte (0x1E), high (VIH) selects the Device Code byte (0x0B). This two-byte code is electrically readable during normal operation and used by industry-standard programmers to auto-detect the device type. The AT27LV040A-15VI shares the identical ID code with the AT27C040, confirming its functional equivalence and programming compatibility.
AT27LV040A-15VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- 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:
- 150 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-15VI FAQ
1.How can I place an order for AT27LV040A-15VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-15VI 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-15VI reliable?
The price and inventory of AT27LV040A-15VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-15VI is usually 5 days.
3.What payment methods are accepted for AT27LV040A-15VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-15VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-15VI?
AT27LV040A-15VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-15VI 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-15VI?
For technical support, including AT27LV040A-15VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-15VI requirements.
6.How does Aetrix verify that AT27LV040A-15VI is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-15VI 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-15VI meets industry standards.
7.What is the process for return or replacement of AT27LV040A-15VI?
All AT27LV040A-15VI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-15VI, 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-15VI part is unused and in its original packaging.
Return procedure for AT27LV040A-15VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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