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Microchip Technology AT27LV040A-90VC
- Part No.:
- AT27LV040A-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT27LV040A-90VC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,045
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Product details
Overview
AT27LV040A-90VC 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 VSOP package. It delivers TTL-compatible outputs at 3.0 V and supports rapid programming at 100 µs/byte - ideal for battery-powered portable instrumentation and legacy embedded boot memory.
For engineers reviewing the AT27LV040A-90VC datasheet, AT27LV040A-90VC pinout, AT27LV040A-90VC application, or AT27LV040A-90VC equivalent, key selection criteria include low-voltage standby current (≤20 µA), 32-pin VSOP footprint compatibility, JEDEC AT27C040 functional equivalence, and industrial temperature support (−40°C to +85°C).
Technical Context
The AT27LV040A-90VC implements a CMOS 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 boards where 3.3 V logic coexists with 5 V peripherals.
It uses Atmel's Rapid™ Programming Algorithm requiring VCC = 6.5 V and VPP = 13.0 V during programming, while maintaining standard LVTTL input/output thresholds (VIH = 2.0 V min, VOH = 2.4 V min at IOH = −2.0 mA). Product identification is accessed via A9 = 12.0 V and A0 toggling to select manufacturer/device code bytes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304-bit (512K × 8) OTP EPROM - fixed boot code storage without reprogrammability |
| Access Time | 90 ns max at VCC = 3.0–3.6 V - enables direct interface with 10 MHz microcontrollers without wait states |
| Supply Voltage | 3.0–3.6 V or 4.5–5.5 V - supports dual-rail system designs and hot-plug compatibility across 3.3 V/5 V hosts |
| Standby Current | 20 µA max at VCC = 3.6 V - reduces quiescent power in always-on embedded controllers |
| Active Power | 36 mW max at 5 MHz and VCC = 3.6 V - half the consumption of comparable 5 V EPROMs |
| Programming Speed | 100 µs/byte typical - cuts firmware update time in manufacturing programming stations |
| ESD Protection | 2,000 V HBM - ensures robustness during board handling and in-circuit programming |
Pinout & Package
AT27LV040A-90VC 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 address bus supporting full 512K-word decoding; A9 used for product ID voltage (12.0 V) during identification mode |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus with TTL-compatible VOH ≥ 2.4 V at −2.0 mA, VOL ≤ 0.4 V at 2.0 mA |
| CE | Chip Enable | Active-low chip select; controls device activation and entry into standby mode when high |
| OE | Output Enable | Active-low output gate; enables data bus drivers independently of CE to manage bus sharing |
| VCC | Power Supply | Primary supply pin accepting 3.0–3.6 V or 4.5–5.5 V; must be applied before/with VPP during programming |
| VPP | Programming Voltage | 13.0 V ± 0.25 V programming supply; requires external 0.1 µF capacitor to ground per datasheet |
| GND | Ground Reference | Signal and power return; decoupling requires 0.1 µF ceramic + 4.7 µF bulk capacitor per array |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical write cycle with up to 10 retries per byte - eliminates need for external verification hardware |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x0B) accessible via A9 = 12.0 V and A0 toggle - enables auto-detection in universal programmers |
| Dual-Voltage Read Operation | Valid function across 3.0–3.6 V and 4.5–5.5 V - permits reuse in both legacy 5 V and modern 3.3 V systems without redesign |
| LVTTL-Compatible I/O | Meets JEDEC LVTTL thresholds (VIH ≥ 2.0 V, VOL ≤ 0.4 V) at 3.0 V supply - interfaces directly with 5 V microcontrollers without level shifters |
| Industrial Temperature Range | −40°C to +85°C operation - qualified for use in automotive control modules and industrial PLCs |
Applications
| Embedded Boot Memory | Legacy Industrial Controller |
|---|---|
Use Scenario: Storing immutable firmware for microcontroller startup in medical diagnostic equipment. IC Role / Device Role / Timing Role: Non-volatile boot ROM providing first-instruction fetch at power-on reset. Use Value: 90 ns access time ensures immediate CPU execution; 20 µA standby current extends battery life in portable units. |
Use Scenario: Replacing obsolete 5 V EPROMs in factory-floor PLC backplanes with mixed-voltage I/O cards. IC Role / Device Role / Timing Role: Pin-compatible OTP replacement for AT27C040 in existing 5 V slots, operating at 3.3 V to reduce heat and power draw. Use Value: Dual-supply support avoids board rewiring; VSOP footprint matches legacy TSOP layouts with minor adapter. |
| Portable Test Instrumentation | Automotive Body Control Module |
Use Scenario: Firmware storage in handheld oscilloscope calibration modules powered by Li-ion batteries. IC Role / Device Role / Timing Role: Low-power OTP memory holding calibration constants and self-test routines. Use Value: 3.0 V minimum operation extends runtime; 2,000 V ESD protection withstands field technician handling. |
Use Scenario: Storing configuration tables and CAN node initialization parameters in vehicle door module ECUs. IC Role / Device Role / Timing Role: Immutable parameter store accessed during cold boot before CAN transceiver initialization. Use Value: −40°C to +85°C rating meets automotive ambient requirements; rapid programming accelerates ECU calibration line throughput. |
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 | 5 V only (4.5–5.5 V), no low-voltage operation; same 90 ns speed and 32-pin PDIP package | Requires dedicated 5 V rail; unsuitable for battery-powered or mixed-voltage systems | Select when legacy 5 V board space and thermal budget allow higher active power (30 mA vs. 8 mA) |
| MX29LV400CBTI-90G | Flash-based, 4 Mbit, 90 ns, 3.0–3.6 V only; supports erase/write cycles, not OTP | Enables field firmware updates but introduces complexity in write-protection and endurance management | Select when reprogrammability is required; not drop-in due to different command set and VPP absence |
Compared with AT27C040-90PC, the AT27LV040A-90VC reduces standby current by 95% and enables 3.3 V system integration; versus MX29LV400CBTI-90G, it eliminates erase/write timing constraints and guarantees data immutability - critical for safety-critical boot code.
Availability
AT27LV040A-90VC is available at Aetrix Electronics and suitable for embedded boot memory, legacy industrial controller upgrades, and portable test instrumentation requiring stable component supply and long-term obsolescence mitigation.
Supply support for AT27LV040A-90VC 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 innovator known for flash memory, microcontrollers, and non-volatile storage solutions targeting industrial, automotive, and consumer applications.
The AT27LV040A product line delivers low-voltage, high-reliability OTP EPROMs designed specifically for cost-sensitive, power-constrained embedded systems needing guaranteed data integrity without reprogrammability.
FAQ
What is the operating temperature range for the AT27LV040A-90VC?
The AT27LV040A-90VC is rated for industrial temperature operation from −40°C to +85°C. This specification is confirmed in the Ordering Information table on page 10 of the datasheet, where the "VI" and "VC" suffixes denote industrial-grade variants. The AT27LV040A-90VC uses the "VC" suffix, indicating VSOP packaging and industrial temperature qualification. This makes the AT27LV040A-90VC suitable for under-hood automotive modules and factory automation controllers exposed to wide thermal swings.
Does the AT27LV040A-90VC require a separate programming voltage (VPP) during normal read operation?
No, the AT27LV040A-90VC does not require VPP during read operation. VPP is only needed during programming and product identification modes, where it must be set to 13.0 V ± 0.25 V. During standard read mode, VPP may be tied to VCC (3.0–3.6 V or 4.5–5.5 V) as stated in the Operating Modes table on page 4. The AT27LV040A-90VC draws only VCC and GND for read functionality, simplifying power design in host systems.
Is the AT27LV040A-90VC pin-compatible with the AT27C040?
Yes, the AT27LV040A-90VC is functionally and pin-compatible with the AT27C040 across all three JEDEC packages (PLCC, TSOP, VSOP), as explicitly stated in the Features section ("Compatible With JEDEC Standard AT27C040") and confirmed in the Pin Configurations diagrams. The AT27LV040A-90VC retains identical pin functions, ordering, and timing behavior - enabling direct substitution in existing AT27C040 designs when low-voltage operation is added.
What decoupling capacitors are required for stable operation of the AT27LV040A-90VC?
The AT27LV040A-90VC requires two decoupling capacitors per device: a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND as close to the pins as possible, plus a 4.7 µF bulk electrolytic capacitor near the power entry point for arrays. These values are mandated in the System Considerations section (page 2) to suppress transient excursions caused by CE switching. Omitting either capacitor risks violating absolute maximum ratings and causing non-conformance in the AT27LV040A-90VC.
How is the product identification code accessed on the AT27LV040A-90VC?
The AT27LV040A-90VC product identification code is accessed by applying 12.0 V ± 0.5 V to A9 (VID), holding A1–A18 low, and toggling A0 between low (VIL) and high (VIH) to select Manufacturer ID (0x1E) or Device ID (0x0B). This mode is detailed in the Operating Modes table (page 4) and the Identification Code diagram (page 9). The AT27LV040A-90VC shares the same ID codes as the AT27C040, ensuring compatibility with industry-standard programming tools.
AT27LV040A-90VC 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:
- 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-VSOP
AT27LV040A-90VC FAQ
1.How can I place an order for AT27LV040A-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-90VC 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-90VC reliable?
The price and inventory of AT27LV040A-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-90VC is usually 5 days.
3.What payment methods are accepted for AT27LV040A-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-90VC?
AT27LV040A-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-90VC 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-90VC?
For technical support, including AT27LV040A-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-90VC requirements.
6.How does Aetrix verify that AT27LV040A-90VC is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-90VC 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-90VC meets industry standards.
7.What is the process for return or replacement of AT27LV040A-90VC?
All AT27LV040A-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-90VC, 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-90VC part is unused and in its original packaging.
Return procedure for AT27LV040A-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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