My Inquiry
My Account
Microchip Technology AT29LV040A-15TI
- Part No.:
- AT29LV040A-15TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV040A-15TI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,992
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT29LV040A-15TI from Microchip Technology (formerly Atmel) is a 4-Mbit (512K × 8) single-voltage 3.3V-only Flash memory IC used for in-system firmware storage and boot code retention in embedded controllers and industrial microprocessor systems. It delivers 150 ns read access time, 20 ms max sector program cycle time, and supports 2048 independent 256-byte sectors with software data protection. Its two 16K-byte boot blocks feature programmable lockout for secure system startup.
For engineers reviewing the AT29LV040A-15TI datasheet, AT29LV040A-15TI pinout, AT29LV040A-15TI application, or AT29LV040A-15TI equivalent, key selection considerations include its 3.3V-only operation, sector-based reprogrammability without high-voltage programming, CMOS/TTL-compatible I/O, industrial temperature range (–40°C to +85°C), and PLCC/TSOP package compatibility for legacy board designs.
Technical Context
The AT29LV040A-15TI implements a nonvolatile Flash architecture with internal address/data latches for 256-byte sector loading, automatic erase-before-program sequencing, and DATA polling (I/O7) or toggle-bit (I/O6) end-of-program detection. Its software data protection requires a three-byte command sequence (AAh→55h→A0h at specific addresses) before any sector programming.
Hardware safeguards include VCC sense (<1.8V inhibits programming), 10 ms power-on delay, noise filtering (<15 ns pulses ignored), and dual-line control (CE/OE) to prevent bus contention during read operations. Boot block lockout is enabled via a seven-command algorithm and disables chip erase when activated.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8), enabling full firmware image storage for mid-complexity microcontrollers |
| Read Access Time | 150 ns - meets timing requirements for 6-MHz Z80 or 8-MHz 8051 bus interfaces |
| Sector Size | 256 bytes - allows fine-grained firmware updates without erasing entire device |
| Program Cycle Time | 20 ms max per sector - enables field-upgradable code with predictable latency |
| Endurance | >10,000 write/erase cycles per sector - supports long-term field maintenance |
| Supply Voltage | 3.0V–3.6V only - eliminates need for charge pumps or external 12V programming voltage |
| Standby Current | 40 µA (CMOS) - suitable for battery-backed or low-power sleep modes |
Pinout & Package
AT29LV040A-15TI is available in 32-lead TSOP (Type 1, 8 × 20 mm) and 32-lead PLCC packages. The TSOP variant (32T) is used in this part number, with gull-wing leads and JEDEC MO-142 BD compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0–A7 select byte within 256-byte sector |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with standard microprocessor data buses; supports byte load and polling |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high-Z output when asserted high |
| OE | Output Enable | Active-low output control; used with CE for bus contention management during reads |
| WE | Write Enable | Active-low write strobe; initiates byte load and triggers internal program cycle after command sequence |
| VCC | Power Supply | +3.3V ±0.3V supply; powers core logic and I/O drivers; VCC sense prevents programming below 1.8V |
| GND | Ground | Reference for all signals and power; decoupling required near VCC pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.3V Supply Operation | Eliminates need for external high-voltage programming circuitry, reducing BOM count and layout complexity |
| Software Data Protection | Three-byte unlock sequence prevents accidental writes during power transitions or noise events |
| Boot Block Lockout | Independent 16K-byte upper/lower block protection ensures bootloader integrity against corruption |
| DATA Polling & Toggle Bit | Real-time program status feedback on I/O7/I/O6 enables deterministic firmware update flow without fixed delays |
| 256-Byte Sector Architecture | Minimizes reprogramming overhead by allowing partial updates instead of full-chip erase |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Retention |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast 150 ns read access for real-time instruction fetch and sector-level field updates. Use Value: Industrial temperature rating (–40°C to +85°C) and >10,000 endurance cycles ensure reliable operation over 10+ years of continuous runtime. |
Use Scenario: Holding certified bootloader code in Class II medical instruments requiring traceable, tamper-resistant firmware startup sequences. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced lockout of two 16K-byte blocks to prevent unauthorized modification. Use Value: Boot block lockout prevents runtime corruption or malicious overwrite, satisfying IEC 62304 software lifecycle requirements. |
| Automotive ECU Calibration Storage | Legacy Industrial HMI Display Firmware |
Use Scenario: Storing engine calibration maps and diagnostic parameters in automotive electronic control units where reprogramming occurs during service intervals. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory supporting sector-based updates via CAN or K-Line diagnostics. Use Value: 3.3V-only operation integrates directly with automotive 3.3V domain supplies; no level-shifting needed for microcontroller interface. |
Use Scenario: Hosting GUI firmware and font assets in human-machine interface panels using older 8/16-bit microcontrollers with parallel bus interfaces. IC Role / Device Role / Timing Role: EPROM-replacement Flash memory with TTL/CMOS-compatible I/O and 150 ns access matching legacy bus timing. Use Value: Pinout and timing compatibility with industry-standard 27C040 EPROMs enables drop-in upgrade without PCB redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-EKE | 4 Mbit, 70 ns access, 3.0–3.6V, 48-pin TSOP; lacks boot block lockout | Higher speed but no dedicated protected boot sectors; requires external lock management | Choose when faster read timing is critical and boot security is handled in software |
| MX29LV400CTTI-70G | 4 Mbit, 70 ns access, 3.0–3.6V, 48-pin TSOP; includes CFI-compliant command set | CFI support simplifies driver portability but uses different sector map (16 × 4K + 2 × 32K) | Prefer for new designs needing standardized flash interface abstraction layers |
Compared with SST39VF400A-70-4C-EKE and MX29LV400CTTI-70G, the AT29LV040A-15TI offers unique 256-byte sector granularity and hardware-enforced boot block lockout-critical for safety-critical legacy systems where firmware integrity must be guaranteed at the silicon level without software dependency.
Availability
AT29LV040A-15TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader retention, and legacy HMI display firmware requiring stable component supply across extended product lifecycles.
Supply support for AT29LV040A-15TI 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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash memory products including the AT29LV040A series.
The AT29LV040A product line was designed for cost-sensitive, in-system programmable firmware storage in industrial, medical, and automotive embedded systems requiring long-term reliability and simple 3.3V-only operation.
FAQ
What is the operating temperature range for AT29LV040A-15TI?
The AT29LV040A-15TI is rated for industrial temperature operation from –40°C to +85°C. This range is validated per the datasheet's DC and AC operating specifications and supports deployment in factory automation, outdoor instrumentation, and vehicle under-hood environments where thermal stability is critical. The part number suffix "I" explicitly denotes industrial grade.
Does AT29LV040A-15TI require high-voltage programming?
No, AT29LV040A-15TI operates exclusively from a 3.0V–3.6V supply and does not require external high-voltage programming signals. All programming is initiated via a three-byte software command sequence (AAh→55h→A0h) followed by sector data loading. Internal circuitry handles erase-and-program sequencing without external 12V inputs.
How is end-of-program detection implemented in AT29LV040A-15TI?
AT29LV040A-15TI provides two hardware-supported methods: DATA polling on I/O7 (complement of loaded data until completion) and toggle-bit monitoring on I/O6 (bit toggles during programming, stabilizes upon completion). Both methods allow real-time status checking without fixed timeouts, enabling deterministic firmware update routines.
Can AT29LV040A-15TI be used as a direct replacement for 27C040 EPROMs?
Yes, AT29LV040A-15TI is pin-compatible and functionally equivalent to 27C040 EPROMs in read mode, with identical 32-pin TSOP/PLCC footprints and TTL/CMOS-compatible I/O levels. Its 150 ns access time matches standard 27C040-15 variants, and it supports the same address/data bus protocols-enabling seamless EPROM-to-Flash upgrades.
What happens if the boot block lockout feature is enabled on AT29LV040A-15TI?
When boot block lockout is activated on either the lower (0x00000–0x03FFF) or upper (0x7C000–0x7FFFF) 16K-byte block, that region becomes permanently read-only: no erase or program commands will affect it. Additionally, chip erase is disabled entirely. Lockout is irreversible and verified by reading FEH (unlocked) or FFH (locked) at addresses 00002H or 7FFF2H in software identification mode.
AT29LV040A-15TI 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:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 20ms
- Access Time:
- 150 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29LV040A-15TI FAQ
1.How can I place an order for AT29LV040A-15TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV040A-15TI 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 AT29LV040A-15TI reliable?
The price and inventory of AT29LV040A-15TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV040A-15TI is usually 5 days.
3.What payment methods are accepted for AT29LV040A-15TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV040A-15TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV040A-15TI?
AT29LV040A-15TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV040A-15TI 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 AT29LV040A-15TI?
For technical support, including AT29LV040A-15TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV040A-15TI requirements.
6.How does Aetrix verify that AT29LV040A-15TI is sourced from the original manufacturer or authorized distributors?
All AT29LV040A-15TI 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 AT29LV040A-15TI meets industry standards.
7.What is the process for return or replacement of AT29LV040A-15TI?
All AT29LV040A-15TI units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV040A-15TI, 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 AT29LV040A-15TI part is unused and in its original packaging.
Return procedure for AT29LV040A-15TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT29LV040A-15TI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
