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Microchip Technology AT49LV002N-12PI
- Part No.:
- AT49LV002N-12PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49LV002N-12PI.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49LV002N-12PI from Microchip Technology (formerly Atmel) is a 2 Mbit (256K × 8) single-supply 3.0–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 120 ns read access time, 10-second chip erase, byte-programmable architecture with sector protection, and operates across industrial temperature range (−40°C to +85°C) in 32-pin PDIP package.
For engineers reviewing the AT49LV002N-12PI datasheet, AT49LV002N-12PI pinout, AT49LV002N-12PI application, or AT49LV002N-12PI equivalent, this page provides verified functional specifications, validated PLCC/PDIP/TSOP/VSOP pin mapping, boot-block lockout behavior, DATA polling and toggle-bit status detection, and direct alternatives for legacy design continuity and supply chain resilience.
Technical Context
The AT49LV002N-12PI implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based programming/erasure. Its internal architecture includes a 16 KB boot block with programmable lockout, two 8 KB parameter blocks, and two main memory blocks (96 KB and 128 KB), enabling secure firmware storage and flexible field updates.
It uses five-volt-compatible command sequences (e.g., 5555h/2AAAh addressing) for chip/sector erase and byte programming without external high-voltage generators. Hardware data protection includes VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and control-line inhibition (OE low, CE high, or WE high blocks writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits - supports full firmware image storage for 8-bit MCUs. |
| Read Access Time | 120 ns - determines maximum bus clock rate for zero-wait-state execution in 8051 or similar architectures. |
| Supply Voltage Range | 3.0 V to 3.6 V - compatible with regulated 3.3 V system rails; no separate VPP required for programming. |
| Active Current | 25 mA - defines peak power draw during read bursts; impacts thermal design in dense PCB layouts. |
| Standby Current | 50 µA CMOS - enables low-power sleep modes in battery-backed or energy-sensitive applications. |
| Erase Cycle Time | 10 seconds (full chip) - sets minimum firmware update latency; sector erase reduces time per block. |
| Byte Programming Time | 30 µs typical - enables fine-grained data logging or configuration updates without bulk erasure. |
| Endurance | 10,000 write/erase cycles - qualifies for industrial control logging, calibration storage, and infrequent firmware patching. |
Pinout & Package
AT49LV002N-12PI is supplied in a 32-lead, 0.600" wide plastic dual in-line package (PDIP), pin-compatible with industry-standard 32-pin Flash memory footprints. Pin 1 is index corner; pin 16 is GND; pin 32 is VCC. Pin 1 is NC (no connect) per datasheet Rev. 0982D–FLASH–02/03.
| 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. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; supports DATA polling on I/O7 and toggle-bit detection on I/O6. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during multi-device sharing. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; not used for boot override (N variant). |
| GND | Ground | Signal reference and power return; pin 16 - critical for noise immunity in mixed-signal systems. |
| VCC | Power Supply | +3.0 V to +3.6 V supply; decoupling capacitor (0.1 µF) required adjacent to pin 32. |
| DC | No Connect | Pin 1 is DC (do not connect); floating or tied to GND/VCC causes undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Lockout | 16 KB boot block (00000h–03FFFh) supports permanent firmware protection via command-activated lockout - prevents accidental overwrite of bootloader code. |
| DATA Polling & Toggle Bit | I/O7 complement feedback and I/O6 toggling provide real-time, hardware-verified program/erase completion detection - eliminates need for fixed delay timers in host firmware. |
| Single 3.3 V Operation | Eliminates requirement for 5 V or 12 V programming voltages - simplifies power design and enables direct MCU GPIO interfacing without level shifters. |
| Hardware Data Protection | VCC sense, noise filtering, and control-line inhibition prevent spurious writes during brown-out, EMI events, or signal glitches - improves field reliability. |
| Industrial Temperature Range | Rated for −40°C to +85°C case temperature - qualified for deployment in automotive body control modules, industrial PLCs, and outdoor telemetry units. |
Applications
| Embedded Bootloader Storage | Firmware Configuration Storage |
|---|---|
Use Scenario: Storing immutable bootloader code in resource-constrained 8-bit microcontroller systems requiring secure startup sequence. IC Role / Device Role / Timing Role: Nonvolatile code memory providing first-instruction fetch at power-on reset; accessed via standard address/data bus with 120 ns timing. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; eliminates risk of bricking devices during OTA firmware upgrades. |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and network credentials in smart metering endpoints. IC Role / Device Role / Timing Role: Parameter block (8 KB × 2) used for EEPROM-like persistent data storage with byte-level write capability. Use Value: 30 µs/byte programming enables rapid field calibration updates without full chip erase - reduces service downtime by >95% vs. legacy EPROMs. |
| Legacy Industrial Controller Upgrade | Medical Device Calibration Archive |
Use Scenario: Replacing obsolete 27C020 EPROMs in aging PLC I/O modules where PCB layout and timing margins are fixed. IC Role / Device Role / Timing Role: Pin- and timing-compatible Flash replacement with identical 32-pin PDIP footprint and 120 ns access. Use Value: Maintains existing board layout and timing budgets while adding in-system reprogrammability - avoids costly redesign and recertification. |
Use Scenario: Archiving factory-calibrated transducer coefficients and regulatory audit logs in Class II medical infusion pumps. IC Role / Device Role / Timing Role: Secure, tamper-resistant nonvolatile memory with lockout-enforced boot region for FDA 21 CFR Part 11 compliance. Use Value: Boot block lockout prevents unauthorized modification of calibration constants; DATA polling ensures deterministic write verification for audit trail integrity. |
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 | 3.3 V-only, 2 Mbit, 70 ns access, 32-pin TSOP; lacks boot block lockout but supports 128-byte page programming. | Higher speed but no hardware-protected boot sector; requires software-managed protection schemes. | Select when faster read performance is prioritized over bootloader security; verify host firmware supports page-mode writes. |
| MX29LV002CTTI-12 | 3.3 V-only, 2 Mbit, 120 ns access, 32-pin TSOP; includes boot block (16 KB) with lockout, but uses different command set (AAh/55h vs. 5555h/2AAAh). | Functionally equivalent boot protection and timing, but requires command sequence adaptation in host driver. | Select for drop-in replacement where PCB supports TSOP; validate command translation layer in existing firmware stack. |
Compared with SST39VF020-70-4C-NHE and MX29LV002CTTI-12, the AT49LV002N-12PI offers guaranteed boot block lockout with Atmel's proven command set and PDIP packaging - making it optimal for legacy through-hole designs requiring unmodified hardware and hardened bootloader integrity.
Availability
AT49LV002N-12PI is available at Aetrix Electronics and suitable for industrial control systems, medical device calibration archives, legacy PLC upgrades, and embedded bootloader storage requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV002N-12PI 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 technical and manufacturing continuity for the AT49LV series. The company specializes in microcontrollers, analog, Flash memory, and security ICs for industrial, automotive, and consumer markets.
The AT49LV002N-12PI belongs to Atmel's legacy parallel Flash memory product line, designed specifically for cost-sensitive, pin-compatible replacements of EPROMs in 8-bit and 16-bit embedded systems requiring in-system reprogrammability and industrial-grade reliability.
FAQ
What is the operating voltage range for the AT49LV002N-12PI?
The AT49LV002N-12PI operates from 3.0 V to 3.6 V - a single 3.3 V nominal supply. It does not support 2.7 V operation (unlike the BV variant) and requires no external VPP voltage for programming. This range ensures compatibility with standard 3.3 V LDO regulators and eliminates level-shifting circuitry in most MCU interfaces. The AT49LV002N-12PI also includes VCC sense circuitry that inhibits programming if supply drops below ~1.8 V, preventing corruption during brown-out conditions.
Does the AT49LV002N-12PI support boot block protection, and how is it enabled?
Yes, the AT49LV002N-12PI includes a 16 KB boot block (addresses 00000h–03FFFh) with hardware-programmable lockout. Protection is enabled via a six-cycle command sequence: write AAh to 5555h, 55h to 2AAAh, 80h to 5555h, AAh to 5555h, 55h to 2AAAh, then 40h to 5555h. Once activated, the boot block becomes permanently read-only under ≤5.5 V - a key safeguard for bootloader code integrity. The AT49LV002N-12PI does not support RESET-pin override (unlike T variants), ensuring irreversible protection.
How is programming completion detected on the AT49LV002N-12PI?
The AT49LV002N-12PI supports two hardware methods: DATA polling and Toggle Bit. During byte programming, reading the programmed address returns the complement of the written data on I/O7 until completion, then true data. Alternatively, I/O6 toggles between 0 and 1 during active programming/erasure and stabilizes upon completion. Both methods eliminate polling delays in host firmware and enable deterministic state transitions - critical for real-time systems using the AT49LV002N-12PI in safety-critical logging or control loops.
What package types are available for the AT49LV002N-12PI, and is it pin-compatible with other variants?
The AT49LV002N-12PI is specified in 32-pin PDIP (plastic dual in-line package), with pin 1 designated NC (no connect). It shares identical pinout and timing with all AT49LV002N-xPI variants (e.g., -70PI, -90PI) and cross-compares to AT49BV002N-12PI, AT49LV002-12PI, and AT49LV002NT-12PI in PDIP. All use the same 32P6 package code, enabling direct substitution where voltage and timing requirements align - though BV variants support 2.7 V operation and T variants include RESET-based boot override.
What is the endurance and data retention specification for the AT49LV002N-12PI?
The AT49LV002N-12PI guarantees a minimum of 10,000 write/erase cycles per memory location and 20-year data retention at +85°C (or 100 years at +25°C). These figures are measured per JEDEC standards and apply uniformly across all sectors - boot block, parameter blocks, and main memory. Retention is preserved even after repeated cycling, making the AT49LV002N-12PI suitable for industrial applications where field updates occur over multi-year product lifecycles without memory degradation.
AT49LV002N-12PI 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:
- 120 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49LV002N-12PI FAQ
1.How can I place an order for AT49LV002N-12PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002N-12PI 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 AT49LV002N-12PI reliable?
The price and inventory of AT49LV002N-12PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002N-12PI is usually 5 days.
3.What payment methods are accepted for AT49LV002N-12PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002N-12PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002N-12PI?
AT49LV002N-12PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002N-12PI 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 AT49LV002N-12PI?
For technical support, including AT49LV002N-12PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002N-12PI requirements.
6.How does Aetrix verify that AT49LV002N-12PI is sourced from the original manufacturer or authorized distributors?
All AT49LV002N-12PI 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 AT49LV002N-12PI meets industry standards.
7.What is the process for return or replacement of AT49LV002N-12PI?
All AT49LV002N-12PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002N-12PI, 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 AT49LV002N-12PI part is unused and in its original packaging.
Return procedure for AT49LV002N-12PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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