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Microchip Technology AT29LV040A-15TU
- Part No.:
- AT29LV040A-15TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV040A-15TU.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,841
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Product details
Overview
AT29LV040A-15TU from Atmel is a 4-Mbit (512K × 8) 3.3V-only Flash memory IC used for nonvolatile code and data storage in embedded systems. It features 150 ns read access time, 2048 × 256-byte sectors, software-controlled sector erase/program, and dual 16K-byte boot blocks with independent programming lockout. It operates across –40°C to +85°C and supports in-system reprogramming without high-voltage inputs.
For engineers reviewing the AT29LV040A-15TU datasheet, AT29LV040A-15TU pinout, AT29LV040A-15TU application, or AT29LV040A-15TU equivalent, key selection criteria include sector-based programming timing (20 ms max), DATA polling and toggle-bit status detection, CMOS/TTL-compatible I/O, and boot-block lockout behavior for secure firmware storage.
Technical Context
The AT29LV040A-15TU implements a sector-erase architecture where each of 2048 sectors (256 bytes) is erased and programmed in a single internal cycle. Programming requires a three-byte software command sequence (AAh/55h/A0h) followed by byte loading with WE or CE control, and uses internal latches to free the address/data bus during programming.
It supports hardware and software data protection: VCC sense (inhibit below 1.8V), 10 ms power-on delay, OE/CE/WE inhibit logic, and 15 ns noise filtering on control lines. Boot block lockout is enabled via a seven-command algorithm and disables chip erase when active.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8), organized as 512K words × 8 bits |
| Read Access Time | 150 ns - determines maximum bus clock rate for zero-wait-state reads |
| Supply Voltage | 3.0 V to 3.6 V - single 3.3V rail operation; no 5V or 12V required |
| Active Current | 15 mA at 5 MHz - defines dynamic power budget during read bursts |
| Standby Current | 50 µA CMOS - enables low-power retention in sleep modes |
| Sector Size | 256 bytes - smallest erasable/programmable unit; impacts firmware update granularity |
| Endurance | >10,000 program/erase cycles per sector - sets field lifetime for field-upgradable firmware |
| Operating Temp | –40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
AT29LV040A-15TU is packaged in a 32-lead TSOP (Type 1, 8 × 20 mm, package code 32T), compliant with JEDEC MO-142 BD. Pin 1 is marked by a beveled corner; leads are gull-wing with 0.50 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus; A0–A7 select byte within 256-byte sector, A8–A18 select sector |
| I/O0–I/O7 | Bidirectional Data Bus | CMOS/TTL-compatible 8-bit data path; supports DATA polling on I/O7 and toggle-bit detection on I/O6 |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high forces outputs to high-Z |
| OE | Output Enable | Active-low output control; used with CE for bus contention management during reads |
| WE | Write Enable | Active-low write strobe; controls byte loading during sector programming |
| VCC | Power Supply | +3.3V ±0.3V supply; powers core logic and I/O drivers |
| GND | Ground | Reference return for all signals and power; decoupling required near VCC pin |
| NC | No Connect | Unbonded pin; must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (AAh/55h/A0h) required before any sector programming - prevents accidental writes during power transients or noise events |
| Boot Block Lockout | Two independent 16K-byte blocks (first and last) can be permanently locked against erase/program - secures bootloader or critical firmware sections |
| DATA Polling & Toggle Bit | I/O7 complements last loaded data until programming completes; I/O6 toggles during operation - enables real-time status monitoring without external timers or interrupts |
| Single-Cycle Sector Program | Internal erase + program executed automatically after 256-byte load - eliminates need for separate erase command and simplifies host firmware |
| Green Packaging | Pb/Halide-free TSOP (32T) - complies with RoHS Directive 2011/65/EU and supports lead-free assembly processes |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing reliable read access and in-field firmware updates via sector programming. Use Value: 150 ns read speed enables deterministic scan-cycle timing; 10,000-cycle endurance supports decades of field updates; boot block lockout prevents corruption of safety-critical startup routines. | Use Scenario: Holding certified bootloader and diagnostic firmware in Class II medical devices requiring long-term data integrity and regulatory traceability. IC Role / Device Role / Timing Role: Secure, tamper-resistant Flash memory used for immutable boot code and revision-locked calibration tables. Use Value: Dual boot blocks allow A/B firmware partitioning; lockout feature ensures FDA-compliant firmware immutability; 50 µA standby current extends battery-backed operation. |
| Telecom Base Station Configuration | Automotive Infotainment System Updates |
Use Scenario: Storing configuration profiles, radio calibration parameters, and protocol stacks in outdoor telecom equipment exposed to thermal cycling and humidity. IC Role / Device Role / Timing Role: Field-upgradable Flash memory supporting remote reconfiguration without hardware intervention. Use Value: 20 ms max sector program time enables rapid parameter updates; software protection prevents miswrites during network-initiated reboots; industrial temp range ensures reliability at cabinet extremes. | Use Scenario: Hosting infotainment OS kernel and UI assets in automotive head units, updated via dealer diagnostics or OTA mechanisms. IC Role / Device Role / Timing Role: Embedded Flash memory enabling secure, authenticated firmware patches while preserving vehicle-specific settings. Use Value: Boot block lockout isolates critical CAN initialization code; 3.3V-only operation simplifies power design; DATA polling allows precise update progress tracking without dedicated status pins. |
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-NHE | 4 Mbit, 70 ns access, 3.0–3.6V, 48-pin TSOP; lacks boot block lockout and uses different command set | Higher speed but no dedicated boot protection; requires modified driver firmware for sector erase | Choose when faster read performance is prioritized over secure boot isolation |
| MX29LV400CBTI-70G | 4 Mbit, 70 ns access, 3.0–3.6V, 48-pin TSOP; includes CFI interface and top/bottom boot blocks with lockout | CFI compliance enables auto-detection in BIOS/bootloader; identical lockout functionality but different unlock sequence | Prefer for new designs requiring standardized flash interrogation and broader ecosystem support |
Compared with SST39VF400A-70-4C-NHE and MX29LV400CBTI-70G, the AT29LV040A-15TU offers proven industrial reliability and simpler command sequencing for legacy systems, though at slower 150 ns access; its dedicated 32-pin TSOP footprint reduces PCB area versus 48-pin alternatives.
Availability
AT29LV040A-15TU is available at Aetrix Electronics and suitable for industrial PLCs, medical device boot storage, telecom configuration retention, and automotive infotainment systems requiring stable component supply across extended lifecycles.
Supply support for AT29LV040A-15TU 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, Flash memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT29LV040A product line delivers cost-effective, single-supply Flash memory optimized for in-system programmability and firmware security in resource-constrained embedded platforms.
FAQ
What is the maximum operating temperature range for the AT29LV040A-15TU?
The AT29LV040A-15TU is rated for industrial operation from –40°C to +85°C. This range is validated per the datasheet's DC and AC operating conditions and applies to all functional specifications including read access time, programming timing, and standby current. The rating reflects guaranteed performance under continuous bias, not just storage limits.
Does the AT29LV040A-15TU require high voltage for programming?
No, the AT29LV040A-15TU does not require high voltage for programming. It operates with a single 3.0–3.6V supply and uses only standard logic-level signals (0V/3.3V) for all commands. Programming is initiated via a three-byte software unlock sequence (AAh/55h/A0h), eliminating the need for 12V VPP or external voltage pumps.
How does the boot block lockout feature work on the AT29LV040A-15TU?
The AT29LV040A-15TU has two 16K-byte boot blocks - one at the lowest addresses (0x00000–0x03FFF) and one at the highest (0x7C000–0x7FFFF). Lockout is enabled independently per block using a seven-command algorithm. Once activated, that block becomes permanently read-only: no erase or program operations are possible, and chip erase is disabled if either block is locked.
Can the AT29LV040A-15TU be used in a 5V system?
The AT29LV040A-15TU is a 3.3V-only device and must be powered from 3.0–3.6V. While its address and control inputs tolerate up to 5.5V (per Input Levels section), the I/O lines are limited to 0–3.6V, and VCC must remain within specification. Interfacing to a 5V bus requires level-shifting circuitry on I/O0–I/O7; direct connection risks damage or undefined behavior.
What methods are available to detect end-of-program on the AT29LV040A-15TU?
The AT29LV040A-15TU provides two hardware-supported methods: DATA polling (monitoring complement-to-data on I/O7) and toggle-bit detection (observing I/O6 toggling state). Both operate during the internal 20 ms program cycle and require no external timing components. Polling may begin immediately after byte loading; toggle-bit sampling can use any address location.
AT29LV040A-15TU 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-15TU FAQ
1.How can I place an order for AT29LV040A-15TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV040A-15TU 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-15TU reliable?
The price and inventory of AT29LV040A-15TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV040A-15TU is usually 5 days.
3.What payment methods are accepted for AT29LV040A-15TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV040A-15TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV040A-15TU?
AT29LV040A-15TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV040A-15TU 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-15TU?
For technical support, including AT29LV040A-15TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV040A-15TU requirements.
6.How does Aetrix verify that AT29LV040A-15TU is sourced from the original manufacturer or authorized distributors?
All AT29LV040A-15TU 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-15TU meets industry standards.
7.What is the process for return or replacement of AT29LV040A-15TU?
All AT29LV040A-15TU units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV040A-15TU, 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-15TU part is unused and in its original packaging.
Return procedure for AT29LV040A-15TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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