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Microchip Technology AT49LV002T-70PI
- Part No.:
- AT49LV002T-70PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49LV002T-70PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,433
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Product details
Overview
AT49LV002T-70PI from Microchip Technology (formerly Atmel) is a 2-Mbit (256K × 8) single-supply 3.0–3.6V in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller boot systems. It delivers 70 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across the commercial temperature range (0°C to 70°C) in a 32-lead PDIP package.
For engineers reviewing the AT49LV002T-70PI datasheet, AT49LV002T-70PI pinout, AT49LV002T-70PI application, or AT49LV002T-70PI equivalent, this page provides verified functional identity, validated pin roles, confirmed sector-based erase/program behavior, boot-block lockout logic, and real-world design implications for firmware update architectures and secure boot implementations.
Technical Context
The AT49LV002T-70PI implements a standard parallel Flash interface with CE/OE/WE control logic and supports EPROM-like read operations. Its memory array is partitioned into one 16K-byte boot block (address range 3C000H–3FFFFH), two 8K-byte parameter blocks, and two main memory blocks (96K and 128K bytes).
It uses command-based software control for erase and program functions - including chip erase (6-cycle sequence), sector erase (6-cycle with address-dependent sector selection), and byte programming (4-cycle). Boot block lockout is enabled via a six-command sequence and can be overridden only by applying 12 V ± 0.5 V to the RESET pin during operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits |
| Read Access Time | 70 ns - determines minimum bus cycle timing for reliable instruction fetch or data read in 8-bit microcontroller interfaces |
| Supply Voltage Range | 3.0 V to 3.6 V - compatible with 3.3 V system rails without level-shifting |
| Active Current | 25 mA - defines peak power draw during read or program cycles |
| Standby Current | 50 µA CMOS - enables low-power retention in battery-backed or always-on embedded systems |
| Erase Cycle Time | 10 seconds (typical) - sets firmware update latency for full-chip or sector-level reprogramming |
| Byte Programming Time | 30 µs typical - enables fine-grained field updates without requiring full-block erasure |
| End-of-Program Detection | DATA polling (I/O7 complement) or Toggle Bit (I/O6 toggling) - eliminates need for fixed timing delays in host firmware |
Pinout & Package
AT49LV002T-70PI is supplied in a 32-lead plastic dual in-line package (PDIP), 0.600" wide (package code 32P6). Pin 1 is index corner, with pin numbering counterclockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A0–A14 used for software ID mode |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read output |
| OE | Output Enable | Active-low output gate; controls data bus tristate to prevent contention during shared-bus operation |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command cycle timing |
| RESET | Reset Input | Active-low reset; halts ongoing program/erase; 12 V override enables boot block reprogramming when lockout is active |
| I/O0–I/O7 | Data Inputs/Outputs | Bidirectional 8-bit data bus; I/O7 used for DATA polling, I/O6 for Toggle Bit status indication |
| VCC | Power Supply | +3.0 V to +3.6 V supply; internal voltage regulation enables consistent program pulse generation |
| GND | Ground | Reference return path for all digital and programming currents |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16K-byte protected region (3C000H–3FFFFH) prevents accidental overwrite of boot code; lockout activated via 6-command sequence |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes) |
| Sector Architecture | Independent erasability of two 8K parameter blocks and two main memory blocks enables modular firmware updates without full-chip erase |
| DATA Polling & Toggle Bit | Real-time end-of-program detection via I/O7 complement or I/O6 toggle eliminates fixed timeout delays in host controller firmware |
| Single 3.3 V Supply | No external 5 V or 12 V required for normal operation - simplifies power design and reduces BOM cost |
Applications
| Embedded Boot Memory | Firmware Update Storage |
|---|---|
Use Scenario: Storing bootloader code executed at MCU power-on reset in industrial PLCs and medical devices. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to CPU address space; accessed via parallel bus with 70 ns read latency. Use Value: Boot block lockout ensures bootloader integrity across field firmware updates; sector erase allows parameter block reconfiguration without affecting main firmware. |
Use Scenario: Field-upgradable firmware storage in network edge routers where new images are downloaded and validated before installation. IC Role / Device Role / Timing Role: In-system reprogrammable Flash holding candidate firmware image; erased and programmed via host MCU using command sequences. Use Value: 10-second chip erase and 30 µs/byte programming enable rapid, atomic firmware swaps; DATA polling ensures deterministic timing for host state machines. |
| Secure Configuration Storage | Legacy System Code Retention |
Use Scenario: Storing calibrated sensor coefficients and device-specific security keys in automotive ECUs with tamper-resistant requirements. IC Role / Device Role / Timing Role: Parameter block (8K × 2) used for write-once configuration data; lockout prevents runtime corruption. Use Value: Hardware protection (VCC sense, noise filter) and software lockout jointly enforce data immutability after factory calibration or key injection. |
Use Scenario: Replacing obsolete EPROMs in legacy industrial controllers where PCB layout and timing margins are fixed. IC Role / Device Role / Timing Role: Pin-compatible Flash drop-in replacement for 27C020 EPROMs; identical 32-pin DIP footprint and CE/OE/WE interface. Use Value: 70 ns access matches EPROM timing; no board redesign needed; eliminates UV-eraser dependency and supports in-circuit reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF020-70-4C-NHE | 3.0–3.6 V supply, 70 ns access, 2 Mbit density, but uses different command set and lacks RESET-based boot override | Requires modified host driver for erase/program; no 12 V boot unlock - unsuitable where legacy boot lockout recovery is mandatory | Select if command compatibility with SST39VF family is prioritized over Atmel-specific boot recovery features |
| MX29LV020TC-70G | 3.0–3.6 V, 70 ns, 2 Mbit, supports CFI query, but boot block size is 8K not 16K and lockout mechanism differs | CFI support eases auto-detection in generic flash programmers; smaller boot block may require firmware relocation | Select for systems needing standardized CFI interface or where boot code fits in 8K and CFI toolchain integration is critical |
Compared with SST39VF020-70-4C-NHE and MX29LV020TC-70G, the AT49LV002T-70PI offers unique 16K boot block addressing (3C000H–3FFFFH) and hardware-enabled 12 V RESET override - critical for field-recoverable secure boot in long-lifecycle industrial designs.
Availability
AT49LV002T-70PI is available at Aetrix Electronics and suitable for embedded boot memory, firmware update storage, and secure configuration storage requiring stable component supply, long-term obsolescence management, and traceable sourcing for industrial and medical OEM programs.
Supply support for AT49LV002T-70PI 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 the AT49LV series as part of its legacy parallel Flash portfolio, emphasizing reliability and long-term supply for industrial control and instrumentation.
The AT49LV002T-70PI belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for 3.3 V embedded systems requiring in-system reprogrammability, robust data retention, and hardware-assisted write protection in resource-constrained environments.
FAQ
What is the boot block address range for AT49LV002T-70PI?
The AT49LV002T-70PI boot block occupies address range 3C000H to 3FFFFH (16 Kbytes). This differs from non-T variants (e.g., AT49LV002), which locate the boot block at 00000H–03FFFH. The T-suffix denotes top-boot architecture, enabling direct mapping of boot code to high memory addresses for Harvard-architecture MCUs.
Does AT49LV002T-70PI support 12 V programming or 12 V-only operations?
No - AT49LV002T-70PI operates exclusively from a 3.0–3.6 V supply for all normal read, erase, and program functions. The 12 V ± 0.5 V signal applies only to the RESET pin during boot block override operations and is not used for programming voltage generation. Internal charge pumps handle all required high-voltage pulses.
How is boot block lockout enabled and verified on AT49LV002T-70PI?
Boot block lockout is enabled by executing a six-command sequence (AAh/55h/80h/AAh/55h/40h) to address 5555h. Verification is performed in Software Product Identification mode: reading address 3C002H returns lockout status on I/O0 - low = unlocked, high = locked. This is specific to the T-suffix variant's top-boot layout.
Can AT49LV002T-70PI be used as a direct replacement for AT49BV002T-70PI?
No - AT49LV002T-70PI requires 3.0–3.6 V only, while AT49BV002T-70PI supports 2.7–3.6 V. Though pinout and timing match, the lower 2.7 V threshold of the BV version enables operation in brown-out or battery-depleted conditions where the LV variant would reset. Voltage range mismatch makes them non-interchangeable without system-level validation.
What packaging and temperature grade does AT49LV002T-70PI use?
AT49LV002T-70PI uses a 32-lead plastic dual in-line package (PDIP, 0.600" wide, package code 32P6) and is rated for the commercial temperature range (0°C to 70°C). The "-70" suffix denotes 70 ns access time; the "-PI" suffix confirms PDIP packaging and commercial grade - distinct from "-JI" (industrial PDIP) or "-TC" (TSOP).
AT49LV002T-70PI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49LV002T-70PI FAQ
1.How can I place an order for AT49LV002T-70PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002T-70PI 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 AT49LV002T-70PI reliable?
The price and inventory of AT49LV002T-70PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002T-70PI is usually 5 days.
3.What payment methods are accepted for AT49LV002T-70PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002T-70PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002T-70PI?
AT49LV002T-70PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002T-70PI 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 AT49LV002T-70PI?
For technical support, including AT49LV002T-70PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002T-70PI requirements.
6.How does Aetrix verify that AT49LV002T-70PI is sourced from the original manufacturer or authorized distributors?
All AT49LV002T-70PI 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 AT49LV002T-70PI meets industry standards.
7.What is the process for return or replacement of AT49LV002T-70PI?
All AT49LV002T-70PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002T-70PI, 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 AT49LV002T-70PI part is unused and in its original packaging.
Return procedure for AT49LV002T-70PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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