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Microchip Technology AT27LV040A-90TU
- Part No.:
- AT27LV040A-90TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT27LV040A-90TU.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,053
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Product details
Overview
AT27LV040A-90TU 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 JEDEC-standard PLCC/TSOP/VSOP packages - used in embedded firmware storage for industrial controllers and legacy instrumentation.
For engineers reviewing the AT27LV040A-90TU datasheet, AT27LV040A-90TU pinout, AT27LV040A-90TU application, or AT27LV040A-90TU equivalent, this page provides verified package mapping, dual-supply operation details, rapid programming timing (100 µs/byte), TTL/CMOS I/O compatibility, and industrial temperature support (−40°C to +85°C).
Technical Context
The AT27LV040A-90TU implements a single-supply OTP EPROM architecture with two-line control (CE/OE), enabling bus contention avoidance in multi-device memory systems. Its address space spans A0–A18 (19-bit), supporting full 512K-byte decoding without external logic.
It features integrated product identification (Manufacturer ID = 0x1E, Device ID = 0x0B) readable via A9 high-voltage select and A0 toggle, ensuring compatibility with industry-standard programmers. Rapid programming uses 100 µs CE pulses at VCC = 6.5 V and VPP = 13.0 V, with up to 10 retries per byte before failure declaration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8) - supports full firmware image storage for 8-bit microcontrollers without bank switching. |
| Read Access Time | 90 ns max at VCC = 3.0–3.6 V - enables direct interface with 10 MHz Z80 or 8051 derivatives without wait states. |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - allows seamless integration into dual-voltage systems (e.g., 3.3 V logic with 5 V legacy peripherals). |
| Standby Current | 20 µA max at VCC = 3.6 V - extends battery life in portable diagnostic tools and handheld meters. |
| Programming Speed | 100 µs/byte typical - reduces production programming cycle time by >5× versus standard 5 V EPROMs. |
| Operating Temperature | −40°C to +85°C - qualified for deployment in industrial PLC backplanes and automotive under-hood ECUs. |
| I/O Compatibility | JEDEC LVTTL - ensures interoperability with 74LVC, 74ALVC, and legacy 74LS families without level shifters. |
Pinout & Package
AT27LV040A-90TU is supplied in a 32-lead TSOP (Type I, package code 32T), measuring 20.0 mm × 8.0 mm × 1.2 mm, with gull-wing leads and JEDEC MO-142 BD compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus accepting full 512K range; no address latching required. |
| O0–O7 | Data Outputs | True TTL-compatible outputs driving 2.0 mA low / −400 µA high - directly interfaces with 74LS inputs. |
| CE | Chip Enable | Active-low enable controlling device selection; toggling CE between active/standby induces transient voltage spikes requiring local 0.1 µF decoupling. |
| OE | Output Enable | Active-low output gate; allows multiple devices on same data bus with staggered OE timing (tOE = 50 ns). |
| VCC | Power Supply | Primary supply input supporting dual ranges (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 input for programming; requires dedicated 0.1 µF capacitor to ground to suppress transients. |
| GND | Ground Reference | Common return path for VCC and VPP; decoupling capacitors must connect here with minimal trace length. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-Voltage Read Operation | Eliminates need for separate 5 V regulators in mixed-voltage systems - supports hot-plug into both 3.3 V and 5 V host slots. |
| Rapid Programming Algorithm | Reduces factory programming time by minimizing verification loops; guarantees byte-level reliability without external algorithm tuning. |
| Integrated Product ID Code | Enables automatic programmer recognition of manufacturer (0x1E) and device type (0x0B), preventing incorrect voltage application during programming. |
| 2,000 V ESD Protection | Meets IEC 61000-4-2 Level 4 for handling in uncontrolled environments - critical for field-replaceable modules in service depots. |
| Green (Pb/Halide-free) Packaging | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3 - suitable for lead-free reflow assembly. |
Applications
| Industrial Control Firmware Storage | Legacy Instrumentation Boot Memory |
|---|---|
Use Scenario: Storing fixed calibration tables and control algorithms in programmable logic controllers (PLCs) operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot ROM providing deterministic startup sequence and real-time interrupt vector table. Use Value: 90 ns access time ensures zero-wait-state execution of safety-critical ladder logic routines at 10 MHz CPU clock. |
Use Scenario: Holding firmware for analog-to-digital converter front-end modules in oscilloscopes and spectrum analyzers. IC Role / Device Role / Timing Role: Static configuration store accessed only at power-on reset; no runtime writes required. Use Value: 20 µA max standby current extends battery backup duration beyond 10 years in sealed bench instruments. |
| Automotive Diagnostic Tool Memory | Telecom Line Card Configuration |
Use Scenario: Embedded firmware in OBD-II scan tools deployed across vehicle fleets with wide ambient temperature swings. IC Role / Device Role / Timing Role: OTP EPROM holding protocol stacks (SAE J1850, CAN 2.0A/B) and vehicle-specific DTC databases. Use Value: −40°C to +85°C rating ensures reliable operation inside engine compartments during cold cranking and thermal soak. |
Use Scenario: Storing initialization parameters and hardware revision IDs on T1/E1 line interface cards in central office switches. IC Role / Device Role / Timing Role: Immutable configuration repository referenced once per card insertion event. Use Value: Dual-voltage support allows same BOM to serve both legacy 5 V and modern 3.3 V backplane designs without redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-90JU | 5 V-only operation (4.5–5.5 V); no 3.3 V support; identical pinout and programming algorithm. | Requires dedicated 5 V rail; unsuitable for battery-powered or mixed-voltage systems. | Select when system already uses 5 V logic and no low-power constraints exist. |
| MX29LV400CBTI-90G | Flash-based (reprogrammable), 3.3 V only, 48-pin TSOP; different command set and sector architecture. | Supports field firmware updates but requires bootloader and erase-cycle management overhead. | Select when reprogrammability outweighs OTP simplicity and cost sensitivity. |
Compared with AT27C040-90JU, the AT27LV040A-90TU enables lower system power and broader supply flexibility; compared with MX29LV400CBTI-90G, it eliminates erase complexity and guarantees bit-level write permanence - critical for safety-certified firmware.
Availability
AT27LV040A-90TU is available at Aetrix Electronics and suitable for industrial control firmware storage, legacy instrumentation boot memory, and automotive diagnostic tool memory requiring stable component supply across extended product lifecycles.
Supply support for AT27LV040A-90TU 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 designer specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT27LV040A-90TU belongs to Atmel's low-voltage OTP EPROM product line, engineered to replace 5 V EPROMs in power-constrained and dual-voltage systems while maintaining full JEDEC compatibility and programming ecosystem alignment.
FAQ
What is the maximum operating voltage for AT27LV040A-90TU during normal read mode?
The AT27LV040A-90TU supports two distinct read-mode supply 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 at voltages outside these ranges during read - applying 3.7 V or 4.4 V risks functional instability or parametric noncompliance. The AT27LV040A-90TU must use VCC = 6.5 V only during programming, with strict sequencing relative to VPP.
Can AT27LV040A-90TU be programmed using standard AT27C040 programming equipment?
Yes, the AT27LV040A-90TU programs identically to the AT27C040 using the same equipment, including voltage settings and CE pulse timing. Both share the same Product Identification Code (0x1E/0x0B) and rapid programming algorithm (100 µs/byte). The AT27LV040A-90TU requires VPP = 13.0 V and VCC = 6.5 V during programming - matching AT27C040 requirements - and accepts identical address/data sequences.
Does AT27LV040A-90TU support true 3.3 V TTL-compatible outputs?
Yes, the AT27LV040A-90TU produces TTL-level outputs (VOH ≥ 2.4 V, VOL ≤ 0.4 V) when VCC = 3.0–3.6 V and drives 2.0 mA low / −400 µA high, meeting JEDEC LVTTL standards. This allows direct connection to 74LS, 74ALS, and 74F families without level translation. The AT27LV040A-90TU maintains this compatibility across its full industrial temperature range (−40°C to +85°C).
What decoupling capacitance is required for stable AT27LV040A-90TU operation?
Each AT27LV040A-90TU requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins to suppress transients induced by CE switching. For boards with multiple AT27LV040A-90TU devices, a 4.7 µF bulk electrolytic capacitor must also be added near the power entry point to stabilize the array supply. These values are mandatory per Atmel's system design guidelines.
Is AT27LV040A-90TU RoHS-compliant and halogen-free?
Yes, the AT27LV040A-90TU carries the "U" suffix denoting Atmel's Green (Pb/Halide-free) packaging option, compliant with EU RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level 3. Its TSOP package uses matte tin lead finish and halogen-free molding compound, supporting lead-free reflow soldering profiles up to 260°C peak temperature.
AT27LV040A-90TU 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-90TU FAQ
1.How can I place an order for AT27LV040A-90TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-90TU 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-90TU reliable?
The price and inventory of AT27LV040A-90TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-90TU is usually 5 days.
3.What payment methods are accepted for AT27LV040A-90TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-90TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-90TU?
AT27LV040A-90TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-90TU 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-90TU?
For technical support, including AT27LV040A-90TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-90TU requirements.
6.How does Aetrix verify that AT27LV040A-90TU is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-90TU 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-90TU meets industry standards.
7.What is the process for return or replacement of AT27LV040A-90TU?
All AT27LV040A-90TU units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-90TU, 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-90TU part is unused and in its original packaging.
Return procedure for AT27LV040A-90TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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