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Microchip Technology AT49LV040-70VC
- Part No.:
- AT49LV040-70VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV040-70VC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,047
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Product details
Overview
AT49LV040-70VC from Atmel is a 4-megabit (512K × 8) single-voltage Flash memory IC operating at 3.0V–3.6V, featuring 70 ns read access time, 16 KB boot block with programmable lockout, and 10,000 write/erase cycles. It serves as nonvolatile program storage in embedded microcontroller systems requiring in-system reprogrammability without high-voltage programming.
For engineers reviewing the AT49LV040-70VC datasheet, AT49LV040-70VC pinout, AT49LV040-70VC application, or AT49LV040-70VC equivalent, key selection criteria include boot-sector protection logic, 30 µs byte-programming time, CMOS standby current of 50 µA, and compatibility with standard 32-pin TSOP (8 × 14 mm) PCB footprints.
Technical Context
The AT49LV040-70VC implements a software-controlled command register architecture for erase, program, and product identification operations using six-byte sequences written to specific address/data latches (e.g., 5555h/AAh, 2AAAh/55h). It supports both hardware and software boot block lockout activation via dedicated command sequences.
It features dual end-of-operation detection: Data Polling (I/O7 complement toggle) and Toggle Bit (I/O6 state alternation), enabling host firmware to synchronize without fixed timing delays. The device operates in standard EPROM-compatible read mode when CE and OE are low and WE is high, with outputs entering high-impedance state if either CE or OE is deasserted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8), organized as 512K words × 8 bits - supports full firmware image storage for 8-bit microcontrollers. |
| Read Access Time | 70 ns max - enables direct execution from flash (XIP) in systems with ≤14 MHz bus clocks. |
| Supply Voltage | 3.0V to 3.6V - compatible with 3.3V logic rails and eliminates need for voltage translators. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small configuration blocks without system interruption. |
| Chip Erase Time | 10 seconds max - enables full memory reset during manufacturing or recovery procedures. |
| Endurance | 10,000 program/erase cycles - sufficient for bootloader update scenarios over product lifetime. |
| Standby Current | 50 µA CMOS - reduces power in sleep-mode embedded applications such as battery-backed controllers. |
Pinout & Package
AT49LV040-70VC is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP), 8 mm × 14 mm footprint (JEDEC MO-142 BA, type 32V), suitable for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A0–A15 used for main array, A16–A18 extend to boot block range. |
| CE | Chip Enable | Active-low chip select; must be low for read/write access; high disables outputs and reduces current to 50 µA. |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention; high forces I/O pins to high-impedance. |
| WE | Write Enable | Active-low write strobe; latches data on rising edge when CE is active; controls internal command register loading. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; carries command codes, data, manufacturer/device IDs, and polling responses. |
| VCC | Power Supply | 3.0V–3.6V supply; includes VCC sense circuitry that inhibits programming if voltage drops below 1.8V. |
| GND | Ground Reference | Signal and power ground; decoupling capacitor required within 10 mm of VCC pin per datasheet layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16 KB (00000h–03FFFh) permanently protected after software-enable sequence - secures bootloader code against accidental overwrite. |
| Data Polling | I/O7 returns complement of programmed byte until completion - enables deterministic firmware wait-loop without fixed timeout. |
| Toggle Bit Detection | I/O6 toggles during erase/program; stops when operation ends - provides secondary, pin-level status indication independent of data content. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibit logic prevent spurious writes during power transients or EMI events. |
| Software Product Identification | Manufacturer code (1Fh) and device code (13h) readable via command sequence - enables automatic device detection in multi-vendor BOM environments. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing firmware images and calibration tables in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Nonvolatile program memory providing XIP-capable instruction storage with 70 ns access for real-time scan-cycle execution. Use Value: Boot block lockout prevents corruption of safety-critical startup routines during field firmware updates, ensuring deterministic system boot behavior. | Use Scenario: Holding certified bootloader code in Class II medical instruments requiring regulatory-compliant update mechanisms and traceable firmware integrity. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for signed bootloader binaries validated prior to application firmware execution. Use Value: 10,000 write cycles and hardware data protection meet IEC 62304 software lifecycle requirements for safe reprogramming in clinical settings. |
| Automotive Diagnostic Tool Memory | Point-of-Sale Terminal Configuration |
Use Scenario: Storing diagnostic protocol stacks and vehicle-specific parameter files in handheld OBD-II scanners operating across automotive temperature ranges (−40°C to +85°C). IC Role / Device Role / Timing Role: Field-upgradable flash memory interfacing directly with ARM Cortex-M0+ host MCU via parallel bus. Use Value: 30 µs byte programming enables fast patch deployment during service visits without requiring full chip erase, minimizing tool downtime. | Use Scenario: Retaining localized language packs, tax rule databases, and merchant-specific configuration in retail POS terminals with infrequent but critical firmware updates. IC Role / Device Role / Timing Role: Low-power, long-life nonvolatile storage for static configuration data accessed only at boot or admin mode. Use Value: 50 µA standby current extends battery backup runtime during AC power loss, preserving transaction logs and settings for >72 hours. |
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, 3.0V–3.6V supply, but uses different command set and lacks boot block lockout feature. | Requires modified firmware driver for erase/program commands; no hardware-enforced boot sector protection. | Select when legacy SST39VF driver support exists and boot block security is not required. |
| MX29LV040CTTI-70G | 4 Mbit, 70 ns, 3.0V–3.6V, includes boot block but uses 32-pin PLCC (32J) or larger TSOP (32T); no 8×14 mm VSOP option. | Requires PCB redesign for 8×20 mm TSOP or PLCC footprint; identical boot lockout behavior and timing. | Select when existing board uses PLCC socket or larger TSOP and pinout compatibility with AT49LV040-70VC is confirmed. |
Compared with SST39VF040-70-4C-NHE and MX29LV040CTTI-70G, the AT49LV040-70VC uniquely combines 8×14 mm TSOP packaging, hardware-enforced boot block lockout, and Atmel's standardized command protocol - making it optimal for space-constrained industrial controllers needing guaranteed bootloader integrity.
Availability
AT49LV040-70VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader retention, automotive diagnostic tool updates, and point-of-sale terminal configuration requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV040-70VC 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, designs high-reliability nonvolatile memory and microcontroller solutions for industrial, automotive, and embedded markets.
The AT49LV series was developed specifically for 3.3V-system boot memory applications requiring robust in-system reprogrammability, hardware data protection, and secure boot block architecture - targeting cost-sensitive yet safety-aware embedded platforms.
FAQ
What is the maximum operating temperature range for the AT49LV040-70VC?
The AT49LV040-70VC is rated for commercial operation from 0°C to +70°C. Its datasheet specifies this temperature range explicitly for the -70VC suffix variant, and it does not support industrial-grade −40°C to +85°C operation - that capability applies only to the -70JI, -70TI, and -70VI variants. Always verify ambient thermal design margins against this 0°C to 70°C limit when deploying the AT49LV040-70VC.
Does the AT49LV040-70VC support true 3.3V-only operation without requiring 5V or 12V programming voltages?
Yes, the AT49LV040-70VC operates exclusively at 3.0V to 3.6V for both read and write functions. It uses internally generated high-voltage pulses controlled by software commands, eliminating external high-voltage supplies. This is confirmed by its "Battery-Voltage™" designation and the absence of VPP pin or 12V requirement in all AC/DC specifications - a core feature of the AT49LV040-70VC design.
How is boot block protection enabled on the AT49LV040-70VC?
Boot block protection on the AT49LV040-70VC is enabled via a six-byte software command sequence: load AAh to address 5555h, 55h to 2AAAh, 80h to 5555h, then AAh/55h/40h to the same addresses. Once executed, the 16 KB boot sector (00000h–03FFFh) becomes permanently write-protected. The AT49LV040-70VC does not support hardware fuse-based lockout - only this irreversible software method.
Can the AT49LV040-70VC be used as a direct replacement for the AT49BV040-70VC?
No, the AT49LV040-70VC is not a direct replacement for the AT49BV040-70VC. While pinout and timing are identical, the AT49BV040-70VC supports 2.7V–3.6V operation, whereas the AT49LV040-70VC requires 3.0V–3.6V minimum. Systems powered at 2.7V–2.99V will fail to program or erase the AT49LV040-70VC, making substitution invalid without voltage margin verification.
What package type does the AT49LV040-70VC use, and is it RoHS compliant?
The AT49LV040-70VC uses a 32-lead Plastic Thin Small Outline Package (TSOP) measuring 8 mm × 14 mm (JEDEC MO-142 BA, type 32V). Per Atmel's 2001 documentation and Microchip's legacy compliance records, this variant is leaded (non-RoHS) - RoHS-compliant equivalents were introduced later under different part numbering (e.g., AT49LV040-70VC-2.7, which is not the same as AT49LV040-70VC).
AT49LV040-70VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm 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:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49LV040-70VC FAQ
1.How can I place an order for AT49LV040-70VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV040-70VC 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 AT49LV040-70VC reliable?
The price and inventory of AT49LV040-70VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV040-70VC is usually 5 days.
3.What payment methods are accepted for AT49LV040-70VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV040-70VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV040-70VC?
AT49LV040-70VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV040-70VC 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 AT49LV040-70VC?
For technical support, including AT49LV040-70VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV040-70VC requirements.
6.How does Aetrix verify that AT49LV040-70VC is sourced from the original manufacturer or authorized distributors?
All AT49LV040-70VC 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 AT49LV040-70VC meets industry standards.
7.What is the process for return or replacement of AT49LV040-70VC?
All AT49LV040-70VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV040-70VC, 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 AT49LV040-70VC part is unused and in its original packaging.
Return procedure for AT49LV040-70VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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