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Microchip Technology AT49LV040-70TC
- Part No.:
- AT49LV040-70TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV040-70TC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,155
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Product details
Overview
AT49LV040-70TC 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 AT49LV040-70TC datasheet, AT49LV040-70TC pinout, AT49LV040-70TC application, or AT49LV040-70TC equivalent, key selection criteria include boot-sector protection capability, 70 ns read timing under 3.3 V supply, TSOP-32 (8 × 14 mm) package compatibility, and byte-programming latency of 30 µs typical.
Technical Context
The AT49LV040-70TC implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and software-commanded byte programming and chip erase. Its internal command register executes six-byte sequences for chip erase and boot-block lockout, eliminating external high-voltage circuitry.
It integrates hardware data protection including VCC sense (<1.8 V inhibits programming), noise filtering on WE/CE (<15 ns pulses ignored), and input-level tolerance up to 5.5 V on address/control pins. The device supports Data Polling (I/O7 complement) and Toggle Bit (I/O6 toggling) for cycle completion detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8), enabling full firmware image storage for 8-bit microcontrollers |
| Read Access Time | 70 ns max at 3.0–3.6 V, compatible with 14 MHz bus timing in legacy embedded systems |
| Byte Programming Time | 30 µs typical, allowing rapid field updates without system downtime |
| Chip Erase Time | 10 seconds max, enabling full memory reset during firmware recovery sequences |
| Boot Block Size | 16 KB (00000H–03FFFH), reserved for secure bootloader code with optional permanent lockout |
| Endurance | 10,000 write/erase cycles, suitable for infrequent configuration or calibration data updates |
| Standby Current | 50 µA CMOS, meeting low-power requirements in battery-backed applications |
Pinout & Package
AT49LV040-70TC is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP), 8 mm × 14 mm footprint per JEDEC MO-142 BA, with gull-wing leads and bottom-side marking.
| 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 for extended regions |
| I/O0–I/O7 | Data I/O Bidirectional Bus | 8-bit parallel data path; supports true read/write with tristate control via CE/OE |
| CE | Chip Enable | Active-low chip select; must be low for any access; enables hardware write inhibition when high |
| OE | Output Enable | Active-low output gate; controls data bus drive during read; high-Z when deasserted |
| WE | Write Enable | Active-low write strobe; latches address/data edges for programming; inhibits writes when high |
| VCC | Power Supply | 3.0–3.6 V nominal; powers core logic and I/O buffers; includes VCC sense for programming safety |
| GND | Ground Reference | Signal and power return; required for stable read/write margins and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Single 3.0–3.6 V Operation | Eliminates need for dual-supply or charge-pump circuitry in 3.3 V systems |
| Boot Block Lockout | Software-enabled permanent write protection for 16 KB region (00000H–03FFFH) |
| Data Polling (I/O7) | Enables host MCU to detect byte-program completion without polling delay loops |
| Toggle Bit (I/O6) | Provides asynchronous erase/program status indication independent of address location |
| Hardware Data Protection | Prevents accidental writes via VCC monitoring, control-line state validation, and noise filtering |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory providing reliable boot code and application updates over 10+ year service life. Use Value: 10,000 write cycles and 70 ns read access ensure deterministic startup timing and long-term field update capability without hardware redesign. | Use Scenario: Hosting certified bootloader code in Class II medical instruments requiring secure, tamper-resistant initialization routines. IC Role / Device Role / Timing Role: Secure boot memory with lockable 16 KB sector preventing unauthorized modification of critical startup firmware. Use Value: Boot block lockout feature ensures regulatory-compliant firmware integrity; 50 µA standby current extends battery backup duration. |
| Automotive Diagnostic Module Storage | Point-of-Sale Terminal Configuration Memory |
Use Scenario: Storing diagnostic protocol stacks and calibration tables in OBD-II compliant vehicle service tools operating across -40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-grade Flash memory supporting wide-temperature operation and robust ESD-tolerant I/O. Use Value: 3.0–3.6 V operation matches automotive 3.3 V rail; TSOP-32 package enables compact PCB layout in handheld diagnostic units. | Use Scenario: Retaining localized language packs, tax rate tables, and merchant-specific settings in retail terminals with infrequent firmware updates. IC Role / Device Role / Timing Role: Low-power, byte-programmable nonvolatile memory for persistent parameter storage between power cycles. Use Value: 30 µs byte programming allows fast configuration changes during store setup; 50 µA standby minimizes energy draw in always-on kiosks. |
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 (512K × 8), 70 ns access, 3.0–3.6 V, but uses different command set and lacks boot-block lockout | No hardware-enforced boot sector protection; requires external logic or firmware for secure bootloader isolation | Select when command compatibility with SST39VF family is required and boot security is managed externally |
| MX29LV400CTTI-70G | 4 Mbit (512K × 8), 70 ns, 3.0–3.6 V, top-boot configuration (boot block at highest addresses), different pinout | Boot block located at 7C000H–7FFFFH instead of 00000H–03FFFH; requires PCB layout revision | Choose only if top-boot architecture aligns with existing system memory map and board layout permits TSOP-48 footprint |
Compared with SST39VF400A-70-4C-NHE and MX29LV400CTTI-70G, the AT49LV040-70TC provides bottom-boot sector placement with software-lockable 16 KB region, direct TSOP-32 (8×14 mm) compatibility, and integrated hardware write protection - making it optimal for legacy 8-bit embedded designs requiring secure, field-upgradable firmware storage without layout change.
Availability
AT49LV040-70TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive diagnostic module applications requiring stable component supply across extended product lifecycles.
Supply support for AT49LV040-70TC 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, designed high-reliability nonvolatile memory and microcontroller solutions for industrial, automotive, and consumer applications.
The AT49LV series was engineered specifically for 3.3 V embedded systems needing in-system reprogrammability without high-voltage programming circuitry, targeting cost-sensitive, space-constrained designs with long-term firmware update requirements.
FAQ
What is the operating voltage range for the AT49LV040-70TC?
The AT49LV040-70TC operates within a strict 3.0 V to 3.6 V supply range. This single-voltage specification eliminates the need for auxiliary high-voltage generators during programming. The device incorporates VCC sense circuitry that disables write operations if VCC drops below approximately 1.8 V, ensuring data integrity during brown-out conditions. Input pins tolerate up to 5.5 V, simplifying level-shifting in mixed-voltage systems.
Does the AT49LV040-70TC support boot block protection, and how is it enabled?
Yes, the AT49LV040-70TC includes a 16 KB boot block (00000H–03FFFH) with optional software-enabled lockout. To activate protection, the host must issue a precise six-byte command sequence: load AAh to 5555h, 55h to 2AAAh, then 40h to 5555h, followed by a 1-second pause. Once enabled, the boot block becomes permanently read-only - no further erasure or programming is possible. The AT49LV040-70TC supports lockout status verification via software product identification mode reading I/O0 at address 00002H.
What package type and dimensions does the AT49LV040-70TC use?
The AT49LV040-70TC is supplied in a 32-lead Plastic Thin Small Outline Package (TSOP) with JEDEC MO-142 BA outline, designated as 32V. Its physical dimensions are 8.0 mm × 14.0 mm × 1.2 mm maximum height. This compact footprint supports high-density PCB layouts in space-constrained embedded modules. Pin pitch is 0.5 mm, and lead form is gull-wing, compatible with standard reflow soldering processes.
How does the AT49LV040-70TC indicate completion of a byte programming cycle?
The AT49LV040-70TC offers two hardware-supported methods: Data Polling and Toggle Bit. During programming, reading the last written byte returns its complement on I/O7 (Data Polling); when complete, true data appears. Alternatively, I/O6 toggles between 0 and 1 during active programming and stabilizes upon completion. Both mechanisms allow the host MCU to poll asynchronously without fixed timing delays - a critical capability for deterministic real-time firmware updates in the AT49LV040-70TC.
What is the maximum endurance and data retention specification for the AT49LV040-70TC?
The AT49LV040-70TC guarantees a minimum of 10,000 program/erase cycles per memory location under specified operating conditions (3.0–3.6 V, 0°C to +70°C). Data retention is rated at 20 years at +85°C and exceeds 100 years at +25°C ambient. These figures reflect accelerated testing per industry standards and apply to both main memory and boot block regions - provided the boot block lockout feature is not prematurely enabled before final firmware deployment. The AT49LV040-70TC maintains these specifications without requiring wear-leveling firmware.
AT49LV040-70TC 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:
- 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-TSOP
AT49LV040-70TC FAQ
1.How can I place an order for AT49LV040-70TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV040-70TC 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 AT49LV040-70TC reliable?
The price and inventory of AT49LV040-70TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV040-70TC is usually 5 days.
3.What payment methods are accepted for AT49LV040-70TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV040-70TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV040-70TC?
AT49LV040-70TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV040-70TC 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 AT49LV040-70TC?
For technical support, including AT49LV040-70TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV040-70TC requirements.
6.How does Aetrix verify that AT49LV040-70TC is sourced from the original manufacturer or authorized distributors?
All AT49LV040-70TC 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 AT49LV040-70TC meets industry standards.
7.What is the process for return or replacement of AT49LV040-70TC?
All AT49LV040-70TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV040-70TC, 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 AT49LV040-70TC part is unused and in its original packaging.
Return procedure for AT49LV040-70TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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