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Microchip Technology AT27LV040A-15VC
- Part No.:
- AT27LV040A-15VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27LV040A-15VC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,896
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Product details
Overview
AT27LV040A-15VC from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM optimized for low-voltage battery-powered systems, featuring 150 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 VSOP (8 × 14 mm) packaging. It supports dual-supply interoperability with TTL/CMOS logic and integrates Rapid™ programming (100 µs/byte typical).
For engineers reviewing the AT27LV040A-15VC datasheet, AT27LV040A-15VC pinout, AT27LV040A-15VC application, or AT27LV040A-15VC equivalent, key selection criteria include its OTP architecture, 3.3V/5V dual-rail compatibility, 150 ns timing grade, industrial temperature range (−40°C to +85°C), and VSOP package footprint for space-constrained embedded memory upgrades.
Technical Context
The AT27LV040A-15VC implements a CMOS-based OTP EPROM array with two-line control (CE/OE), enabling bus contention avoidance in shared-memory systems. Its address decoding covers A0–A18 (19-bit), supporting full 512K-word addressing without external latching.
It operates in three distinct voltage modes: low-voltage read (3.0–3.6 V), standard 5V read (4.5–5.5 V), and programming (VCC = 6.5 V, VPP = 13.0 V). Output drive meets LVTTL levels (VOH ≥ 2.4 V at IOH = −400 µA; VOL ≤ 0.4 V at IOL = 2.1 mA) across both supply ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8) - supports firmware storage for microcontrollers with up to 512 KB code space |
| Read Access Time | 150 ns max at VCC = 3.0–3.6 V or 4.5–5.5 V - defines minimum clock cycle for synchronous bus interfacing |
| Standby Current | 20 µA max (CMOS CE mode) at VCC = 3.6 V - enables multi-year battery life in always-on portable devices |
| Supply Voltage Ranges | 3.0–3.6 V (low-power mode) or 4.5–5.5 V (5V legacy compatibility) - eliminates level-shifting in mixed-voltage systems |
| Programming Speed | 100 µs/byte typical (Rapid™ algorithm) - reduces production programming time vs. conventional EPROMs |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded controllers and automotive body electronics |
| ESD Protection | 2,000 V HBM - ensures robustness during handling and PCB assembly without special ESD controls |
Pinout & Package
AT27LV040A-15VC is supplied in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, JEDEC MO-142 BA compliant, with gull-wing leads and pin 1 index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit parallel address bus; fully decoded internally to select one of 512K bytes |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus (output-only in read mode); LVTTL-compatible drive strength |
| CE | Chip Enable | Active-low global enable; places device in standby (high-Z outputs, <20 µA ICC) when high |
| OE | Output Enable | Active-low output gate; controls data bus drive without affecting internal state or power consumption |
| VCC | Power Supply | Primary supply input; must be applied before/with VPP during programming; supports 3.0–3.6 V or 4.5–5.5 V operation |
| VPP | Programming Voltage | 13.0 V ± 0.25 V input required only during programming; must be sequenced with VCC per datasheet timing |
| GND | Ground Reference | Common return path for VCC and VPP; requires local 0.1 µF ceramic decoupling per device |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Read Operation | Operates natively at 3.3 V or 5 V without external regulators - simplifies design in hybrid-voltage backplanes |
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time with auto-verify loop - improves manufacturing throughput and yield |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device Code (0x0B) accessible via A9/VH and A0 toggle - enables automatic programmer setup |
| JEDEC-Standard Pinout | Pin-compatible with AT27C040 in PLCC/TSOP/VSOP packages - allows drop-in replacement in existing 5V designs |
| High-Reliability CMOS Process | 200 mA latchup immunity and 2 kV HBM ESD rating - suitable for industrial environments with noisy power rails |
Applications
| Industrial PLC Firmware Storage | Legacy System Memory Upgrade |
|---|---|
Use Scenario: Storing fixed ladder logic and I/O configuration in DIN-rail mounted programmable logic controllers operating in factory-floor environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped to microcontroller address space; accessed via parallel bus with 150 ns tACC timing constraint. Use Value: Enables long-term firmware retention without battery backup while meeting −40°C to +85°C operational requirements and reducing system power draw by >50% vs. 5V EPROMs. |
Use Scenario: Replacing obsolete 5V-only EPROMs (e.g., AT27C040) in aging test equipment and telecom line cards where board space and power budgets are constrained. IC Role / Device Role / Timing Role: Drop-in OTP memory substitute; retains identical pinout and read interface behavior while adding 3.3V support. Use Value: Eliminates need for level shifters or voltage translators, extends product lifecycle, and cuts standby power from ~100 µA to <20 µA without layout changes. |
| Portable Medical Device Boot ROM | Automotive Body Control Module |
Use Scenario: Holding boot firmware and calibration tables in handheld diagnostic tools powered by single-cell Li-ion batteries (3.0–3.6 V nominal). IC Role / Device Role / Timing Role: Primary boot memory accessed during cold start; requires guaranteed 150 ns access under worst-case VCC = 3.0 V. Use Value: Delivers deterministic boot timing and sub-µA typical standby current, extending battery runtime between charges beyond 6 months in sleep mode. |
Use Scenario: Storing window lift algorithms and door lock logic in automotive BCMs requiring AEC-Q100-relevant reliability and thermal resilience. IC Role / Device Role / Timing Role: Static configuration memory interfaced to 8-bit MCU; withstands repeated thermal cycling and conducted transients per ISO 7637-2. Use Value: 2 kV ESD rating and 200 mA latchup immunity reduce field failure rates; industrial temp grade ensures operation across engine bay ambient extremes. |
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 supply (4.5–5.5 V); no 3.3V operation; same 150 ns speed and PLCC package | Lacks low-voltage capability; unsuitable for battery-powered or mixed-rail systems | Select when legacy 5V-only design prohibits voltage scaling and PLCC footprint is fixed |
| MX29LV400CBTI-15G | Flash-based (reprogrammable); 3.0–3.6 V only; 150 ns access; 48-pin TSOP | Different package (48-pin vs. 32-pin), reprogrammability adds complexity but enables field updates | Choose when firmware updates are required post-deployment and board redesign accommodates larger package |
Compared with AT27C040-15JC, the AT27LV040A-15VC adds 3.3V operation and lower standby power but shares identical timing and JEDEC pinout; versus MX29LV400CBTI-15G, it offers smaller footprint and OTP simplicity but lacks reprogrammability and requires different package layout.
Availability
AT27LV040A-15VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy system memory upgrades, portable medical device boot ROM, and automotive body control modules requiring stable component supply across extended product lifecycles.
Supply support for AT27LV040A-15VC 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, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV040A belongs to Atmel's low-voltage OTP EPROM product line, designed specifically to replace 5V EPROMs in battery-operated and energy-sensitive embedded systems while maintaining pin and function compatibility.
FAQ
What voltage ranges does the AT27LV040A-15VC support during normal read operation?
The AT27LV040A-15VC 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. Both ranges deliver guaranteed 150 ns access time. It does not operate at intermediate voltages like 4.0 V or 3.7 V - only the specified dual bands are valid per datasheet Section "DC and AC Operating Conditions for Read Operation".
Is the AT27LV040A-15VC pin-compatible with the AT27C040 series?
Yes, the AT27LV040A-15VC is JEDEC-pin-compatible with the AT27C040 in all supported packages (PLCC, TSOP, VSOP), including identical pin functions, numbering, and signal timing. This allows direct substitution in existing 5V designs without PCB modification, provided VPP is isolated during non-programming operation.
What programming voltage and sequence are required for the AT27LV040A-15VC?
The AT27LV040A-15VC requires VCC = 6.5 V ± 0.25 V and VPP = 13.0 V ± 0.25 V during programming. Per datasheet Section "Programming Waveforms", VCC must be applied simultaneously with or before VPP and removed simultaneously with or after VPP. A 0.1 µF capacitor is mandatory between VPP and GND to suppress transients.
Does the AT27LV040A-15VC support industrial temperature range operation?
Yes, the AT27LV040A-15VC is qualified for −40°C to +85°C operation, as confirmed by the "Ordering Information" table on page 10 of the datasheet, where the "-15VI" and "-15VC" suffixes denote Industrial and Commercial grades respectively - the "I" in "-15VI" explicitly indicates industrial temperature range.
How is the Integrated Product Identification Code accessed on the AT27LV040A-15VC?
The AT27LV040A-15VC identification code is read by holding A1–A18 low, setting A9 to VH (12.0 V ± 0.5 V), and toggling A0: low selects the Manufacturer ID byte (0x1E), high selects the Device Code byte (0x0B). This occurs during Product Identification mode, with CE and OE both low, as defined in the "Operating Modes" table on page 4.
AT27LV040A-15VC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT27LV040A-15VC FAQ
1.How can I place an order for AT27LV040A-15VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-15VC 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-15VC reliable?
The price and inventory of AT27LV040A-15VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-15VC is usually 5 days.
3.What payment methods are accepted for AT27LV040A-15VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-15VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-15VC?
AT27LV040A-15VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-15VC 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-15VC?
For technical support, including AT27LV040A-15VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-15VC requirements.
6.How does Aetrix verify that AT27LV040A-15VC is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-15VC 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-15VC meets industry standards.
7.What is the process for return or replacement of AT27LV040A-15VC?
All AT27LV040A-15VC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-15VC, 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-15VC part is unused and in its original packaging.
Return procedure for AT27LV040A-15VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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