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Microchip Technology AT27LV040A-90TI
- Part No.:
- AT27LV040A-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT27LV040A-90TI.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,452
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Product details
Overview
AT27LV040A-90TI from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM optimized for low-voltage, battery-powered systems. It operates at 3.0–3.6 V or 4.5–5.5 V, delivers 90 ns read access time, consumes ≤20 µA standby current at 3.6 V, and supports industrial temperature range (−40°C to +85°C) in 32-lead TSOP package. It serves as nonvolatile program storage in embedded controllers and legacy system upgrades.
For engineers reviewing the AT27LV040A-90TI datasheet, AT27LV040A-90TI pinout, AT27LV040A-90TI application, or AT27LV040A-90TI equivalent, key selection criteria include dual-voltage compatibility, rapid 100 µs/byte programming, JEDEC-standard 32-pin TSOP footprint, TTL/CMOS I/O compatibility, and OTP reliability for fixed firmware storage without reprogrammability.
Technical Context
The AT27LV040A-90TI implements a standard OTP EPROM architecture with two-line control (CE/OE), enabling bus contention avoidance in shared-memory systems. Its address space spans A0–A18 (19 bits), supporting full 512K-word decoding with byte-wide O0–O7 outputs.
It features integrated product identification code accessible via A9 high-voltage (12.0 V) and A0 toggle, ensuring correct algorithm selection in automated programmers. Programming requires VCC = 6.5 V and VPP = 13.0 V, with Rapid™ algorithm applying up to ten 100 µs CE pulses per byte until verification passes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304-bit (512K × 8) OTP EPROM - fixed firmware storage with no erase capability. |
| Read Access Time | 90 ns max at VCC = 3.0–3.6 V - enables direct replacement of faster 5V EPROMs in low-power designs. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - supports dual-supply systems and hot-plug compatibility across 3V/5V hosts. |
| Standby Current | 20 µA max at VCC = 3.6 V - reduces quiescent power in always-on embedded modules. |
| Operating Temperature | −40°C to +85°C - qualified for industrial control, automotive body electronics, and outdoor equipment. |
| Package | 32-lead TSOP (8 × 20 mm, JEDEC MO-142 BD) - surface-mount compatible with standard reflow profiles. |
| ESD/Latchup | 2,000 V HBM ESD protection; 200 mA latchup immunity - robust against board-level handling and transient events. |
Pinout & Package
AT27LV040A-90TI is supplied in a 32-lead Thin Small Outline Package (TSOP), Type 1, JEDEC MO-142 BD compliant, with 8 mm × 20 mm footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus accepting full 512K-word range; CMOS/TTL compatible thresholds. |
| O0–O7 | Data Outputs | Byte-wide bidirectional data bus; drives TTL levels even at VCC = 3.0 V. |
| CE | Chip Enable | Active-low global enable; controls device activation and standby entry (VIH = 2.0 V min). |
| OE | Output Enable | Active-low output gate; allows output disable without affecting internal state or power mode. |
| VCC | Power Supply | Primary supply pin; must be applied before/with VPP during programming and removed after/with VPP. |
| VPP | Programming Voltage | 13.0 V ± 0.25 V input for OTP programming; requires external 0.1 µF capacitor to ground. |
| GND | Ground Reference | Signal and power return; decoupling capacitor (0.1 µF ceramic) required adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time - cuts firmware burn time by >5× vs. legacy EPROMs. |
| Dual-Voltage Read Operation | Functional at 3.0–3.6 V or 4.5–5.5 V - eliminates level shifters in mixed-voltage backplanes. |
| Integrated Product ID Code | Manufacturer ID (0x1E) and Device ID (0x0B) readable via A9/VH and A0 toggle - ensures auto-detection in universal programmers. |
| JEDEC-Compatible Pinout | Pin-for-pin compatible with AT27C040 - enables drop-in replacement in existing 5V designs with voltage scaling. |
| Low-Power CMOS Process | 20 µA max standby at 3.6 V - extends battery life in portable instrumentation and handheld terminals. |
Applications
| Industrial PLC Firmware Storage | Legacy PC BIOS Backup |
|---|---|
|
Use Scenario: Storing fixed ladder logic and I/O configuration in programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot firmware and runtime constants; accessed sequentially during startup and cyclic scan. Use Value: Industrial temperature rating and 2,000 V ESD tolerance ensure reliable operation in electrically noisy plant-floor environments with frequent maintenance cycles. |
Use Scenario: Providing fail-safe backup copy of main BIOS image on ISA/PCI add-in cards for desktop and server motherboards. IC Role / Device Role / Timing Role: Secondary read-only memory mapped at fixed address range; activated only during recovery boot or checksum mismatch. Use Value: 90 ns access time and TTL-compatible outputs allow seamless integration into legacy 5V bus architectures without timing redesign. |
| Medical Device Bootloader | Telecom Line Card Configuration |
|
Use Scenario: Holding immutable bootloader code in portable diagnostic equipment requiring FDA-compliant firmware immutability. IC Role / Device Role / Timing Role: One-time programmable ROM storing secure initialization routines; verified at power-on reset before loading application code. Use Value: OTP architecture prevents accidental or malicious overwriting - critical for regulatory compliance and field-reliability assurance. |
Use Scenario: Storing hardware-specific calibration tables and interface parameters on T1/E1 line interface cards in central office switches. IC Role / Device Role / Timing Role: Configuration memory accessed during card insertion and initialization; contents remain static across hot-swap cycles. Use Value: Dual-voltage support allows same part to serve both 3.3 V DSP subsystems and 5 V analog front-end sections on same PCB. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-90JC | 5V-only operation (4.5–5.5 V); no 3.3 V support; identical 90 ns speed and 32-lead PLCC package. | Requires dedicated 5V rail; unsuitable for battery-powered or mixed-voltage systems. | Select when legacy 5V design prohibits voltage scaling and PLCC mounting is preferred. |
| MX29LV400CBTI-90G | Flash-based (reprogrammable), 3.0–3.6 V only, 48-pin TSOP; includes sector protection and command-set interface. | Supports field firmware updates; requires software driver and erase-cycle management. | Select when reprogrammability and in-system update capability outweigh OTP simplicity and cost. |
Compared with AT27LV040A-90TI, AT27C040-90JC offers identical timing and pinout but lacks low-voltage operation, while MX29LV400CBTI-90G provides reprogrammability at the cost of interface complexity and larger package - making AT27LV040A-90TI optimal for cost-sensitive, fixed-code, dual-voltage embedded storage.
Availability
AT27LV040A-90TI is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics hardware, and telecom infrastructure requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for AT27LV040A-90TI 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) designed high-reliability nonvolatile memory and microcontroller solutions for industrial, automotive, and communications markets.
The AT27LV040A product line delivers low-voltage, OTP EPROMs targeting battery-operated and mixed-supply embedded systems where firmware immutability, JEDEC compatibility, and industrial temperature resilience are mandatory.
FAQ
What is the maximum operating voltage for AT27LV040A-90TI during normal read operation?
The AT27LV040A-90TI supports two distinct read voltage ranges: 3.0 V to 3.6 V for low-voltage operation and 4.5 V to 5.5 V for standard 5 V systems. It does not operate reliably outside these ranges during read mode. The 90 ns access time is guaranteed under both conditions, and outputs remain TTL-compatible even at the lower 3.0 V supply.
Can AT27LV040A-90TI be programmed using standard EPROM programmers?
Yes, AT27LV040A-90TI uses the same programming protocol and pinout as the AT27C040, so industry-standard EPROM programmers with Rapid™ algorithm support can program it directly. However, programming requires VCC = 6.5 V and VPP = 13.0 V, and a 0.1 µF capacitor must be placed between VPP and GND to suppress transients - settings that must be explicitly configured in the programmer.
Is AT27LV040A-90TI pin-compatible with AT27C040 in all packages?
AT27LV040A-90TI is JEDEC-standard pin-compatible with AT27C040 in matching package types (e.g., 32-lead TSOP), including identical A0–A18, O0–O7, CE, OE, VCC, VPP, and GND assignments. However, AT27LV040A-90TI's TSOP variant (32T) has different mechanical dimensions than AT27C040's PLCC (32J), so physical interchangeability depends on package type, not just pin count.
What is the purpose of the Integrated Product Identification Code in AT27LV040A-90TI?
The Integrated Product Identification Code in AT27LV040A-90TI provides two electronically readable bytes: Manufacturer ID (0x1E) and Device ID (0x0B). It is accessed by setting A9 to 12.0 V and toggling A0 while holding all other address lines low. This enables automatic device recognition in universal programmers, eliminating manual part selection and reducing programming errors.
Does AT27LV040A-90TI support standby mode, and how is it entered?
Yes, AT27LV040A-90TI enters low-power standby mode when CE is driven high (VIH ≥ 2.0 V), regardless of OE state. In this mode, ICC drops to ≤20 µA at VCC = 3.6 V, and outputs go to high-impedance. Standby mode is fully specified across the industrial temperature range and requires no additional control signals - simplifying power management in battery-backed systems.
AT27LV040A-90TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT27LV040A-90TI FAQ
1.How can I place an order for AT27LV040A-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-90TI 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-90TI reliable?
The price and inventory of AT27LV040A-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-90TI is usually 5 days.
3.What payment methods are accepted for AT27LV040A-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-90TI?
AT27LV040A-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-90TI 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-90TI?
For technical support, including AT27LV040A-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-90TI requirements.
6.How does Aetrix verify that AT27LV040A-90TI is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-90TI 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-90TI meets industry standards.
7.What is the process for return or replacement of AT27LV040A-90TI?
All AT27LV040A-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-90TI, 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-90TI part is unused and in its original packaging.
Return procedure for AT27LV040A-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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