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Microchip Technology AT49LV002N-12JC
- Part No.:
- AT49LV002N-12JC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49LV002N-12JC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
Inventory:3,246
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Product details
Overview
AT49LV002N-12JC 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 commercial temperature range (0°C to 70°C) in a 32-lead PLCC package.
For engineers reviewing the AT49LV002N-12JC datasheet, AT49LV002N-12JC pinout, AT49LV002N-12JC application, or AT49LV002N-12JC equivalent, this page provides verified technical context, validated pin functions, real-world use cases in boot code storage and firmware update systems, and confirmed alternative parts with documented functional and packaging differences.
Technical Context
The AT49LV002N-12JC implements a standard parallel Flash interface with CE/OE/WE control logic and supports EPROM-like read operation timing. Its internal command register executes software-controlled erase and program cycles without external high-voltage circuitry.
Memory organization includes one 16 KB boot block (00000H–03FFFH), two 8 KB parameter blocks, and two main memory blocks (96 KB + 128 KB). Boot block lockout is software-enabled and permanent once activated - no hardware override via RESET pin, distinguishing it from T-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (262,144 × 8), enabling full firmware image storage for 8-bit MCUs |
| Read Access Time | 120 ns max - defines minimum bus cycle duration for reliable instruction fetch |
| Supply Voltage | 3.0 V to 3.6 V - compatible with regulated 3.3 V system rails, no dual-voltage support |
| Erase Time | 10 seconds typical for full chip erase - impacts field firmware update latency |
| Program Time | 30 µs/byte typical - determines write throughput during in-system programming |
| Endurance | 10,000 program/erase cycles - sets lifetime limit for dynamic configuration storage |
| Standby Current | 50 µA CMOS - enables low-power retention in battery-backed applications |
Pinout & Package
AT49LV002N-12JC uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package with J-bend leads. Pin 1 is marked by a notch on the package body and corresponds to A7 per top-view pinout diagram.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing space |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write data transfer; high-impedance when deselected |
| CE | Chip Enable | Active-low chip select; must be low for any memory access to occur |
| OE | Output Enable | Active-low output control; enables data drivers only during read operations |
| WE | Write Enable | Active-low signal initiating byte programming or command latching |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs - no 12 V override capability (N-suffix) |
| VCC | Power Supply | 3.0–3.6 V supply input; powers core logic and I/O buffers |
| GND | Ground Reference | Signal and power return path; decoupling capacitor required near VCC pin |
| DC | No Connect | Pin 1 in PLCC package is unconnected - must remain floating or tied to GND per design guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent 16 KB boot block + dual 8 KB parameter blocks + two main memory blocks enable selective firmware updates without full chip erase |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line inhibit prevent accidental writes during power transients or noise events |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling eliminates need for fixed delay timers during programming/erasing |
| Boot Block Lockout | Permanent software-enforced write protection of boot sector after activation - ensures bootloader integrity in production systems |
| Single 3.3 V Operation | No 5 V or 12 V programming voltage required - simplifies power design and eliminates level-shifting components |
Applications
| Embedded Bootloader Storage | Firmware Update Module |
|---|---|
Use Scenario: Storing immutable startup code in microcontroller-based industrial controllers where bootloader corruption must be prevented. IC Role / Device Role / Timing Role: Nonvolatile boot code repository with hardware-protected execution vector; accessed at power-on reset before main application loads. Use Value: Permanent boot block lockout prevents accidental overwrites during field firmware upgrades, ensuring system always boots reliably. | Use Scenario: Field-upgradable firmware storage in networked IoT gateways requiring secure, in-system reprogramming. IC Role / Device Role / Timing Role: Parallel-access Flash memory holding application binaries; erased and rewritten sector-by-sector during OTA updates. Use Value: 10-second chip erase and 30 µs/byte programming enable sub-minute firmware replacement without device downtime. |
| Parameter Configuration Storage | Legacy System Memory Replacement |
Use Scenario: Retaining calibrated sensor offsets and user preferences in medical diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Low-power (50 µA standby) nonvolatile storage for infrequently modified settings; accessed via MCU GPIO-controlled parallel bus. Use Value: CMOS standby current extends battery life beyond 5 years in maintenance-free deployments. | Use Scenario: Drop-in replacement for obsolete 27C020 EPROMs in legacy industrial PLCs still using 8-bit data buses. IC Role / Device Role / Timing Role: Pin-compatible Flash memory emulating EPROM read behavior with identical CE/OE/WE timing and address mapping. Use Value: 120 ns access time matches original EPROM spec, eliminating timing redesign while enabling in-system reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49LV002N-12PC | DIP-32 package instead of PLCC-32; same electrical specs, timing, and command set | Through-hole mounting for prototyping or legacy board assembly; no surface-mount footprint compatibility | Select for hand-soldered evaluation or repair of through-hole systems |
| SST39VF020-120-4C-NHE | 4 Mbit density (512K × 8), 120 ns access, 3.0–3.6 V supply; different command sequences and sector map | Higher capacity for larger firmware images; requires firmware driver modification due to non-Atmel command protocol | Select when additional memory headroom is needed and software adaptation is feasible |
Compared with AT49LV002N-12PC and SST39VF020-120-4C-NHE, the AT49LV002N-12JC offers identical functionality in a surface-mount PLCC package optimized for automated assembly, while avoiding the software porting effort required by the SST39VF020's proprietary command set.
Availability
AT49LV002N-12JC is available at Aetrix Electronics and suitable for embedded bootloader storage, firmware update modules, and parameter configuration storage requiring stable component supply across industrial and commercial temperature ranges.
Supply support for AT49LV002N-12JC 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 legacy Atmel Flash products including the AT49LV series.
The AT49LV002N-12JC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for single-supply 3.3 V embedded systems needing reliable, in-system reprogrammable nonvolatile memory with sector-level protection.
FAQ
What is the maximum operating temperature range for the AT49LV002N-12JC?
The AT49LV002N-12JC is rated for commercial temperature operation from 0°C to +70°C. It is not qualified for industrial range (−40°C to +85°C); for that specification, the AT49LV002N-12JI variant must be selected. This thermal rating directly affects reliability in enclosed enclosures without active cooling.
Does the AT49LV002N-12JC support hardware reset-based boot block reprogramming?
No. The AT49LV002N-12JC does not support 12 V RESET pin override for boot block reprogramming. That feature is exclusive to T-suffix variants (e.g., AT49LV002T). Once boot block lockout is enabled on the AT49LV002N-12JC, the protection is permanent and irreversible under normal operating conditions.
Can the AT49LV002N-12JC be used as a direct replacement for AT29LV002N-12JC?
No. Although both are 2 Mbit 3.3 V Flash memories in PLCC-32 packages, the AT49LV002N-12JC and AT29LV002N-12JC have incompatible command sets, sector architectures, and timing parameters. Substituting them requires full firmware driver revision and validation - they are not functionally interchangeable.
What is the purpose of the DC (Don't Connect) pin on the AT49LV002N-12JC PLCC package?
Pin 1 of the AT49LV002N-12JC PLCC package is designated DC (Don't Connect) and must remain unconnected or tied to GND per Atmel's layout guidance. It is electrically isolated from internal circuitry and serves no functional role; connecting it to VCC or a signal line may cause undefined behavior or damage.
How does DATA polling work during byte programming of the AT49LV002N-12JC?
During byte programming, reading the programmed address returns the complement of the loaded data on I/O7 until completion. Once programming finishes, true data appears on all I/O lines. This allows the host MCU to poll I/O7 without fixed delays - significantly improving programming efficiency compared to timeout-based methods.
AT49LV002N-12JC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-PLCC (13.97x11.43)
AT49LV002N-12JC FAQ
1.How can I place an order for AT49LV002N-12JC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002N-12JC 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-12JC reliable?
The price and inventory of AT49LV002N-12JC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002N-12JC is usually 5 days.
3.What payment methods are accepted for AT49LV002N-12JC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002N-12JC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002N-12JC?
AT49LV002N-12JC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002N-12JC 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-12JC?
For technical support, including AT49LV002N-12JC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002N-12JC requirements.
6.How does Aetrix verify that AT49LV002N-12JC is sourced from the original manufacturer or authorized distributors?
All AT49LV002N-12JC 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-12JC meets industry standards.
7.What is the process for return or replacement of AT49LV002N-12JC?
All AT49LV002N-12JC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002N-12JC, 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-12JC part is unused and in its original packaging.
Return procedure for AT49LV002N-12JC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV002N-12JC Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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