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Microchip Technology AT27LV040A-12TC
- Part No.:
- AT27LV040A-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT27LV040A-12TC.pdf
- Description:
- IC EPROM 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,446
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Product details
Overview
AT27LV040A-12TC from Atmel is a 4-Mbit (512K × 8) one-time programmable EPROM optimized for low-voltage battery-powered systems, featuring 120 ns read access time at 3.0–3.6 V or 4.5–5.5 V, dual-supply compatibility, and JEDEC-standard 32-lead TSOP packaging. It delivers TTL-compatible outputs at 3.0 V and supports rapid programming at 100 µs/byte.
For engineers reviewing the AT27LV040A-12TC datasheet, AT27LV040A-12TC pinout, AT27LV040A-12TC application, or AT27LV040A-12TC equivalent, key selection criteria include its 120 ns tACC timing grade, 32-lead TSOP (8 × 20 mm) package, industrial temperature range (−40°C to +85°C), and OTP EPROM architecture with integrated product identification code.
Technical Context
The AT27LV040A-12TC implements a CMOS-based OTP EPROM architecture with two-line control (CE/OE), enabling bus contention avoidance in multi-device memory systems. Its dual-voltage operation supports both 3.3 V and 5 V host environments without level-shifting circuitry.
It uses Atmel's Rapid™ Programming Algorithm with 100 µs/byte typical programming pulses at VCC = 6.5 V and VPP = 13.0 V, and features an electronically readable Product Identification Code (Manufacturer ID = 0x1E, Device ID = 0x0B) accessed via A9 and A0 under specific voltage conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 4,194,304 bits (512K × 8) - fixed storage capacity for firmware or boot code |
| Read Access Time (tACC) | 120 ns max at VCC = 3.0–3.6 V or 4.5–5.5 V - defines minimum clock cycle for reliable read operations |
| Supply Voltage Range | 3.0–3.6 V or 4.5–5.5 V - enables interoperability with both 3.3 V and 5 V logic families |
| Standby Current (ISB) | 20 µA max at VCC = 3.6 V - enables ultra-low-power retention in portable or battery-backed systems |
| Active Power Dissipation | 36 mW max at 5 MHz and VCC = 3.6 V - reduces thermal load and extends battery life vs. standard 5 V EPROMs |
| Programming Voltage (VPP) | 13.0 ± 0.25 V - required only during programming; must be applied after and removed before VCC per sequencing rules |
| ESD Protection | 2,000 V HBM - ensures robust handling during board assembly and field service |
Pinout & Package
AT27LV040A-12TC is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP), 8 mm × 20 mm body size, JEDEC MO-142 BD compliant, with gull-wing leads and pin 1 index mark on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; TTL/CMOS compatible |
| O0–O7 | Data Outputs | 8-bit bidirectional data bus; outputs drive TTL loads directly at 3.0 V |
| CE | Chip Enable | Active-low chip select; controls device activation and standby entry |
| OE | Output Enable | Active-low output gate; allows shared bus operation with other devices |
| VCC | Power Supply | Primary supply input for read/standby modes; accepts 3.0–3.6 V or 4.5–5.5 V |
| VPP | Programming Voltage | High-voltage input (13.0 V) required only during programming; must be sequenced with VCC |
| GND | Ground Reference | Common return path for all signals and power; requires local 0.1 µF ceramic decoupling |
Key Features
| Feature | Design Value |
|---|---|
| Rapid™ Programming Algorithm | 100 µs/byte typical programming time - reduces production test time and improves yield in high-volume programming |
| Dual-Voltage Read Operation | 3.0–3.6 V or 4.5–5.5 V support - eliminates need for external voltage translators in mixed-supply systems |
| Integrated Product ID Code | Manufacturer ID = 0x1E, Device ID = 0x0B - enables automatic algorithm selection in industry-standard programmers |
| JEDEC-Standard Packages | 32-lead TSOP (8 × 20 mm) - ensures drop-in compatibility with existing PCB footprints for AT27C040 variants |
| Low-Power Standby Mode | <1 µA typical ISB at 3.3 V - critical for always-on embedded systems with extended battery life requirements |
Applications
| Industrial Control Firmware Storage | Portable Medical Device Boot Memory |
|---|---|
Use Scenario: Storing immutable boot firmware and calibration tables in PLC modules operating in harsh environments. IC Role / Device Role / Timing Role: OTP EPROM providing nonvolatile, tamper-resistant program storage with guaranteed data retention over 10 years. Use Value: Industrial temperature rating (−40°C to +85°C) and 2,000 V ESD protection ensure reliability in factory-floor deployments. |
Use Scenario: Holding certified bootloader and safety-critical initialization routines in handheld diagnostic equipment. IC Role / Device Role / Timing Role: Low-voltage OTP memory enabling direct interface with 3.3 V microcontrollers without level shifters. Use Value: 20 µA max standby current extends single-charge battery life beyond 12 months in sleep mode. |
| Legacy System ROM Replacement | Embedded Test Equipment Configuration |
Use Scenario: Upgrading aging 5 V systems with lower-power, pin-compatible memory while retaining existing PCB layout. IC Role / Device Role / Timing Role: Drop-in replacement for AT27C040 with identical pinout and JEDEC TSOP footprint. Use Value: Dual-supply operation allows seamless integration into both legacy 5 V and modern 3.3 V subsystems. |
Use Scenario: Storing hardware-specific configuration bitmaps and self-test vectors in automated test fixtures. IC Role / Device Role / Timing Role: One-time programmable storage for factory-programmed calibration and serial data. Use Value: Integrated product ID code ensures correct programming algorithm selection across heterogeneous test platforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar OTP EPROM applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT27C040-12JC | 5 V-only operation (4.5–5.5 V); no 3.3 V support; same 120 ns speed grade and PLCC package | Requires dedicated 5 V rail; unsuitable for battery-powered or mixed-voltage designs | Select when system lacks 3.3 V supply but retains legacy PLCC socket and 5 V infrastructure |
| MX29LV400CBTI-12G | Flash-based (reprogrammable), 3.0–3.6 V only, 48-pin TSOP; different command set and write timing | Enables field firmware updates; requires flash controller logic and erase-cycle management | Select when reprogrammability and smaller footprint outweigh OTP security and simplicity |
Compared with AT27C040-12JC, the AT27LV040A-12TC adds 3.3 V operation and lower standby power but shares identical timing and pinout in TSOP; versus MX29LV400CBTI-12G, it offers simpler interface and higher data integrity for unchangeable firmware, at the cost of reprogrammability.
Availability
AT27LV040A-12TC is available at Aetrix Electronics and suitable for industrial control firmware storage, portable medical device boot memory, and legacy system ROM replacement requiring stable component supply across long-lifecycle programs.
Supply support for AT27LV040A-12TC 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 for power-constrained, portable, and mixed-supply embedded systems requiring high-reliability, factory-programmed firmware storage.
FAQ
What is the maximum operating temperature range for the AT27LV040A-12TC?
The AT27LV040A-12TC is rated for industrial temperature operation from −40°C to +85°C. This specification applies to all read, standby, and output-enable functions when powered within the valid VCC ranges (3.0–3.6 V or 4.5–5.5 V). The device maintains full AC timing compliance-including 120 ns tACC-across this entire range, making it suitable for deployment in demanding environmental conditions without derating.
Does the AT27LV040A-12TC support true 3.3 V logic interfacing without level translation?
Yes, the AT27LV040A-12TC produces TTL-compatible output levels (VOH ≥ 2.4 V, VOL ≤ 0.4 V) when operated at VCC = 3.0 V, allowing direct connection to standard 3.3 V or 5 V TTL/CMOS inputs. Input thresholds (VIH ≥ 2.0 V, VIL ≤ 0.8 V) are also compatible with both voltage domains, eliminating the need for external level-shifting circuitry in mixed-supply systems using the AT27LV040A-12TC.
Can the AT27LV040A-12TC be programmed in-system, or does it require a dedicated programmer?
The AT27LV040A-12TC requires a dedicated EPROM programmer capable of delivering VPP = 13.0 V and precise 100 µs CE pulses. In-system programming is not supported due to the high-voltage VPP requirement and lack of internal charge pumps. Programming must occur off-board using industry-standard equipment that recognizes the AT27LV040A-12TC's integrated product ID code (0x1E/0x0B) to auto-select correct algorithms and verify sequences.
What decoupling capacitance is required for stable operation of the AT27LV040A-12TC?
Each AT27LV040A-12TC requires a 0.1 µF high-frequency ceramic capacitor placed between VCC and GND, mounted as close as possible to the device pins. For boards containing multiple AT27LV040A-12TC units or large EPROM arrays, a 4.7 µF bulk electrolytic capacitor must also be added near the main power entry point. These values are specified in the "System Considerations" section of the official Atmel datasheet to suppress transient excursions during CE transitions.
Is the AT27LV040A-12TC pin-compatible with the AT27C040 series in TSOP packages?
Yes-the AT27LV040A-12TC shares identical pinout, signal definitions, and 32-lead TSOP (8 × 20 mm) mechanical dimensions with the AT27C040-12TC. Both devices use the same CE/OE control scheme, address/data bus organization, and JEDEC MO-142 BD outline. This enables direct PCB-level substitution where 3.3 V operation or lower standby power is desired, without layout changes.
AT27LV040A-12TC 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:
- 120 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-TSOP
AT27LV040A-12TC FAQ
1.How can I place an order for AT27LV040A-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT27LV040A-12TC 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-12TC reliable?
The price and inventory of AT27LV040A-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT27LV040A-12TC is usually 5 days.
3.What payment methods are accepted for AT27LV040A-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT27LV040A-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT27LV040A-12TC?
AT27LV040A-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT27LV040A-12TC 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-12TC?
For technical support, including AT27LV040A-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT27LV040A-12TC requirements.
6.How does Aetrix verify that AT27LV040A-12TC is sourced from the original manufacturer or authorized distributors?
All AT27LV040A-12TC 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-12TC meets industry standards.
7.What is the process for return or replacement of AT27LV040A-12TC?
All AT27LV040A-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT27LV040A-12TC, 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-12TC part is unused and in its original packaging.
Return procedure for AT27LV040A-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT27LV040A-12TC Tags
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