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Microchip Technology AT29LV040A-15TC
- Part No.:
- AT29LV040A-15TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT29LV040A-15TC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,993
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Product details
Overview
AT29LV040A-15TC from Atmel is a 4-Mbit (512K × 8) 3.3V-only Flash memory IC organized as 524,288 words × 8 bits, featuring 2048 sectors of 256 bytes each, 150 ns read access time, and software-controlled sector erase/program with boot block lockout. It serves as nonvolatile program/data storage in embedded microcontroller systems requiring in-system reprogrammability without high-voltage programming.
For engineers reviewing the AT29LV040A-15TC datasheet, AT29LV040A-15TC pinout, AT29LV040A-15TC application, or AT29LV040A-15TC equivalent, key selection criteria include 3.3V-only operation, sector-based programming timing (20 ms max), DATA polling/toggle-bit status detection, CMOS/TTL-compatible I/O, and dual 16K boot blocks with independent lockout capability.
Technical Context
The AT29LV040A-15TC implements a sector-erase architecture where each 256-byte sector is erased and programmed in a single internal cycle, using latched address/data inputs and an on-chip timer. Programming requires a three-byte unlock sequence (AAh/55h/A0h) followed by byte loading within 150 µs intervals.
It supports hardware and software data protection: VCC sense (inhibit below 1.8V), 10 ms power-on delay, OE/CE/WE control-line inhibition, and noise filtering (<15 ns pulses ignored). 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 (512K × 8), enabling firmware storage for mid-complexity 8/16-bit MCUs |
| Read Access Time | 150 ns (tACC), compatible with 5 MHz bus timing without wait states |
| Supply Voltage | 3.3 V ± 0.3 V only - eliminates need for 5V/12V programming rails |
| Active Current | 15 mA at 5 MHz - enables low-power system-level sleep/wake design |
| Standby Current | 40 µA (CMOS), reducing quiescent power in always-on embedded nodes |
| Endurance | >10,000 program/erase cycles per sector - supports field firmware updates |
| Sector Size | 256 bytes - balances granularity and overhead for partial reprogramming |
Pinout & Package
AT29LV040A-15TC is housed in a 32-lead Thin Small Outline Package (TSOP, Type 1), 8 mm × 20 mm body, compliant with JEDEC MO-142 BD. Pin 1 identifier is marked on the top surface.
| 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; supports byte load during programming and true data output during read |
| 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 to prevent bus contention during reads |
| WE | Write Enable | Active-low write strobe - controls latching of address/data during sector programming |
| VCC | Power Supply | 3.3 V ± 0.3 V supply - powers core logic and I/O; VCC sense inhibits programming if below 1.8 V |
| GND | Ground | Reference for all signals and power - required for stable read/write margins and noise immunity |
| NC | No Connect | Unbonded pin - must remain unconnected to avoid parasitic coupling or ESD paths |
Key Features
| Feature | Design Value |
|---|---|
| Software Data Protection | Three-byte unlock sequence (5555h/2AAAh/5555h) prevents accidental writes - critical for field-upgradable firmware integrity |
| Dual Boot Block Lockout | Independent 16K-byte lockout for lower (0x00000–0x03FFF) and upper (0x7C000–0x7FFFF) blocks - secures bootloader code against overwrite |
| DATA Polling & Toggle Bit | I/O7 complement polling and I/O6 toggle provide real-time, bus-compatible program completion detection - eliminates fixed-timing delays in host firmware |
| Internal Address/Data Latches | Latches 256 bytes at microprocessor speed before internal erase/program - frees address/data bus for concurrent operations |
| Green Packaging Option | Pb/Halide-free TSOP package - meets RoHS compliance requirements for industrial and consumer deployments |
Applications
| Industrial PLC Firmware Storage | Automotive Instrument Cluster Boot Code |
|---|---|
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 program memory holding boot loader, runtime firmware, and calibration tables; accessed via 8-bit parallel bus at ≤5 MHz. Use Value: 40 µA standby current extends battery-backed operation during power loss; industrial temp range (-40°C to +85°C) ensures reliability across ambient conditions. | Use Scenario: Holding boot code and display initialization routines in automotive digital instrument clusters where secure startup is safety-critical. IC Role / Device Role / Timing Role: Boot block-protected Flash memory storing verified bootloader; accessed during cold start before MCU main application loads. Use Value: Independent 16K boot block lockout prevents corruption of validated startup code during over-the-air updates to application firmware. |
| Medical Device Configuration Memory | Networking Equipment Parameter Storage |
Use Scenario: Retaining device-specific calibration coefficients, user preferences, and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Sector-erasable nonvolatile storage for infrequently updated parameters; accessed via standard memory-mapped read/write cycles. Use Value: >10,000 endurance cycles support lifetime recalibration events; 150 ns access enables responsive UI updates without latency penalties. | Use Scenario: Storing MAC addresses, firmware version metadata, and port configuration profiles in Ethernet switches and routers. IC Role / Device Role / Timing Role: In-system programmable Flash used for field-upgradable configuration data; programmed via host processor during manufacturing or maintenance. Use Value: Software data protection prevents unintended writes during network-induced voltage transients; 256-byte sector granularity minimizes update window for parameter changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF040-70-4C-NHE | 4 Mbit, 70 ns access, 3.3V operation, same 32-pin TSOP package, but uses different unlock sequence (5555h/2AAAh/5555h → 5555h/2AAAh/AAh) | Supports faster read timing but lacks boot block lockout; no dedicated hardware protection for bootloader regions | Select when higher read speed is prioritized over boot code security; verify compatibility of unlock command flow in existing firmware |
| MX29LV040CTTI-15G | 4 Mbit, 150 ns access, 3.3V operation, identical 32-pin TSOP package, same sector size and software protection model | Includes enhanced VCC monitor and wider operating voltage tolerance (2.7–3.6 V); pinout and timing fully compatible | Drop-in replacement for extended voltage margin and improved power-supply noise immunity; suitable for designs with marginal 3.3V regulation |
Compared with SST39VF040-70-4C-NHE and MX29LV040CTTI-15G, the AT29LV040A-15TC uniquely provides independently lockable dual 16K boot blocks - a critical differentiator for safety- or security-sensitive boot architectures where bootloader integrity must be enforced at the hardware level.
Availability
AT29LV040A-15TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive instrument cluster boot code, and medical device configuration memory requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT29LV040A-15TC 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 devices for embedded systems.
The AT29LV040A-15TC belongs to Atmel's legacy 3.3V-only Flash memory product line, designed specifically for cost-sensitive, in-system reprogrammable applications in industrial, automotive, and medical electronics where reliability and software-controlled security are essential.
FAQ
What is the maximum operating temperature range for the AT29LV040A-15TC?
The AT29LV040A-15TC is rated for industrial temperature operation from -40°C to +85°C. This specification is confirmed in the "DC and AC Operating Range" table (Section 6) of the official datasheet, where the "-15TC" suffix explicitly denotes the TSOP package with industrial-grade thermal performance. The device maintains full functionality-including 150 ns read access, 20 ms sector programming, and 40 µA standby current-across this entire range.
Does the AT29LV040A-15TC require external high-voltage programming circuitry?
No, the AT29LV040A-15TC does not require external high-voltage programming circuitry. It operates exclusively from a 3.3 V ± 0.3 V supply and uses software-controlled sector programming with a three-byte unlock sequence (AAh/55h/A0h). All erase and program functions are executed internally using the same VCC rail, eliminating the need for 12 V or other auxiliary programming voltages - a key feature highlighted in the "Description" and "Features" sections of the datasheet.
How is program completion detected on the AT29LV040A-15TC?
Program completion on the AT29LV040A-15TC is detected using two complementary methods: DATA polling on I/O7 (which returns the complement of loaded data until completion) and the toggle bit on I/O6 (which alternates between 0 and 1 during programming and stabilizes upon completion). Both mechanisms are fully supported in the AT29LV040A-15TC and require no additional hardware - details are provided in Sections 4.6 and 4.7 of the datasheet.
Can both boot blocks on the AT29LV040A-15TC be locked independently?
Yes, the AT29LV040A-15TC supports independent lockout of its two 16K-byte boot blocks - one located at the lowest 16K (0x00000–0x03FFF) and the other at the highest 16K (0x7C000–0x7FFFF). The lockout is enabled via separate seven-command sequences per block, and once activated, prevents any further erase or program operations to that block. This behavior is documented in Section 4.9 ("Boot Block Programming Lockout") and verified in the "Boot Block Lockout Feature Enable Algorithm" (Section 25).
Is the AT29LV040A-15TC pin-compatible with the AT29LV040A-15JC?
Yes, the AT29LV040A-15TC and AT29LV040A-15JC share identical pinouts and electrical specifications, differing only in package type: TSOP (32T) vs. PLCC (32J). Both use the same 32-pin layout, address/data/control signal mapping, and timing parameters (150 ns access, 20 ms sector program). This compatibility is confirmed in Section 26.1 ("Ordering Information") and the "Pin Configurations" diagrams (Sections 2.1 and 2.2) of the datasheet.
AT29LV040A-15TC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT29LV040A-15TC FAQ
1.How can I place an order for AT29LV040A-15TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT29LV040A-15TC 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-15TC reliable?
The price and inventory of AT29LV040A-15TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT29LV040A-15TC is usually 5 days.
3.What payment methods are accepted for AT29LV040A-15TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT29LV040A-15TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT29LV040A-15TC?
AT29LV040A-15TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT29LV040A-15TC 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-15TC?
For technical support, including AT29LV040A-15TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT29LV040A-15TC requirements.
6.How does Aetrix verify that AT29LV040A-15TC is sourced from the original manufacturer or authorized distributors?
All AT29LV040A-15TC 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-15TC meets industry standards.
7.What is the process for return or replacement of AT29LV040A-15TC?
All AT29LV040A-15TC units undergo pre-shipment inspection (PSI). If there is an issue with AT29LV040A-15TC, 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-15TC part is unused and in its original packaging.
Return procedure for AT29LV040A-15TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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