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Microchip Technology AT49LV002T-70PC
- Part No.:
- AT49LV002T-70PC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49LV002T-70PC.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,305
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Product details
Overview
AT49LV002T-70PC 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 systems. It delivers 70 ns read access time, 10-second chip erase, byte-programmable operation (30 µs/byte typical), and hardware data protection - enabling secure boot code retention in industrial control firmware updates.
For engineers reviewing the AT49LV002T-70PC datasheet, AT49LV002T-70PC pinout, AT49LV002T-70PC application, or AT49LV002T-70PC equivalent, key selection considerations include its 32-pin PDIP package, boot block lockout feature (address range 3C000H–3FFFFH), sector-based erase architecture, and compatibility with standard 5V-command protocols despite 3.3V-only operation.
Technical Context
The AT49LV002T-70PC implements a sector-organized Flash architecture with one 16K-byte boot block (3C000H–3FFFFH), two 8K-byte parameter blocks (3A000H–3BFFFH and 38000H–39FFFH), and two main memory blocks (20000H–37FFFH and 00000H–1FFFFH). Its command interface uses standard microprocessor timing with CE/OE/WE control lines and supports software-triggered chip/sector erase and byte programming via six-cycle command sequences.
It features dual end-of-operation detection: DATA polling (I/O7 complement toggle) and Toggle Bit (I/O6 toggling during program/erase). Hardware protection includes VCC sense (<1.8V inhibits programming), noise filtering (<15 ns pulses ignored), and input state locking (OE low, CE high, or WE high disables writes).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized for direct microcontroller address/data bus interfacing |
| Read Access Time | 70 ns - enables real-time instruction fetch from 14.3 MHz system clocks without wait states |
| Supply Voltage | 3.0–3.6V - compatible with 3.3V logic families and eliminates need for level shifters |
| Chip Erase Time | 10 seconds - deterministic full-memory reset without external timing circuitry |
| Byte Programming Time | 30 µs typical - supports field-upgradable firmware patches with minimal downtime |
| Endurance | 10,000 write/erase cycles - validated for long-term use in programmable logic controllers |
| Standby Current | 50 µA CMOS - suitable for battery-backed applications requiring ultra-low quiescent power |
Pinout & Package
AT49LV002T-70PC 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/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-byte addressing; A17 enables access to upper memory block (20000H–37FFFH) |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path; supports byte-wide reads/writes and product identification mode |
| CE | Chip Enable | Active-low chip select; enables device decoding in multi-chip memory maps |
| OE | Output Enable | Active-low output control; allows shared bus operation with other peripherals |
| 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-impedance outputs; 12V override enables boot block reprogramming |
| VCC | Power Supply | +3.0V to +3.6V supply; powers internal charge pumps and logic |
| GND | Ground | Reference return path for all signals and power |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 16K-byte protected region (3C000H–3FFFFH) prevents accidental overwrite of bootloader code; enabled via 6-cycle command sequence |
| Data Polling & Toggle Bit | Real-time program/erase completion detection using I/O7 or I/O6 - eliminates need for fixed delay timers in host firmware |
| Sector Erase Flexibility | Independent erasure of parameter blocks (8K each) and main memory blocks (96K/128K) enables modular firmware updates without full chip erase |
| Hardware Write Protection | VCC sense, noise filtering, and control-line gating prevent spurious writes during power transients or EMI events |
| Software Product Identification | Manufacturer code (1FH) and device code (08H) readable via 3-cycle software command - enables automatic algorithm selection in universal programmers |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage with fast 70 ns read access for deterministic scan-cycle execution. Use Value: Sector erase capability allows incremental firmware patching; 10,000-cycle endurance ensures >10-year field life under daily update cycles. | Use Scenario: Hosting secure boot code that initializes CPU, configures peripherals, and validates application image integrity before execution. IC Role / Device Role / Timing Role: Boot block (3C000H–3FFFFH) provides tamper-resistant storage for critical startup routines. Use Value: Boot block lockout prevents corruption during field upgrades; 12V RESET override enables recovery if lockout is prematurely activated. |
| Medical Device Configuration Storage | Automotive Diagnostic Module Memory |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory audit logs in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter block (3A000H–3BFFFH and 38000H–39FFFH) stores infrequently modified settings with byte-level write granularity. Use Value: 30 µs/byte programming enables rapid calibration updates; 50 µA standby current extends battery life in handheld units. | Use Scenario: Storing OBD-II protocol stacks and vehicle-specific calibration tables in after-market diagnostic tools. IC Role / Device Role / Timing Role: Main memory block (00000H–1FFFFH) holds updatable diagnostic firmware accessible via CAN-connected host MCU. Use Value: 3.0–3.6V operation matches automotive 3.3V domain; 10-second chip erase supports quick firmware rollback during service procedures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49LV002T-70JI | Same core Flash array and command set, but in 32-pin PLCC package with industrial temperature range (−40°C to +85°C) | Required for extended-temperature deployments in motor drives or outdoor infrastructure | Select when board layout accommodates surface-mount PLCC and ambient operating temperature exceeds 70°C |
| SST39VF020-70-4C-NHE | 2-Mbit Flash with 70 ns access, but uses different command protocol (SST proprietary) and lacks boot block lockout override via 12V RESET | Compatible for basic code storage but not for secure bootloader implementations requiring field-recoverable lockout | Choose only if existing firmware already supports SST command set and boot block protection is not required |
Compared with AT49LV002T-70JI, the AT49LV002T-70PC offers identical functionality in through-hole PDIP packaging for prototyping and legacy designs, while SST39VF020-70-4C-NHE provides drop-in speed compatibility but requires firmware adaptation and sacrifices boot block recovery capability.
Availability
AT49LV002T-70PC is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, automotive diagnostics, and embedded bootloader applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49LV002T-70PC 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 AT49LV002T-70PC belongs to Atmel's Battery-Voltage™ Flash family, designed specifically for reliable in-system reprogramming in 3.3V embedded systems where firmware security and field upgradeability are critical.
FAQ
What is the boot block address range for AT49LV002T-70PC?
The boot block for AT49LV002T-70PC occupies addresses 3C000H to 3FFFFH (16K bytes). This differs from non-T variants (e.g., AT49LV002-70PC), which locate the boot block at 00000H–03FFFH. The T-suffix denotes top-boot architecture, placing protected code at the highest memory address for natural alignment with reset vector fetches.
Does AT49LV002T-70PC support 5V-tolerant inputs?
No, AT49LV002T-70PC does not support 5V-tolerant inputs. All inputs (including CE, OE, WE, RESET, and address lines) must remain within −0.6V to VCC + 0.6V. With VCC = 3.6V max, absolute maximum input voltage is 4.2V. Applying 5V signals risks permanent damage and violates Absolute Maximum Ratings.
How is boot block lockout overridden on AT49LV002T-70PC?
Boot block lockout on AT49LV002T-70PC can be overridden by applying 12.0V ± 0.5V to the RESET pin during chip erase, sector erase, or byte programming operations. Once RESET returns to TTL levels, lockout reactivates. This feature is absent in N-suffix variants (e.g., AT49LV002N-70PC), making the T-suffix essential for field-recoverable bootloader protection.
What package type is used for AT49LV002T-70PC?
AT49LV002T-70PC uses a 32-lead, 0.600" wide plastic dual in-line package (PDIP), designated as package code "32P6" in Microchip's ordering nomenclature. This through-hole package supports breadboard prototyping, socket-based testing, and legacy PCB designs requiring DIP footprints.
Can AT49LV002T-70PC be programmed using standard 5V microcontroller write cycles?
Yes, AT49LV002T-70PC accepts standard 5V-compatible command sequences (e.g., 5555H/AAH, 2AAAH/55H) for erase and programming - despite operating exclusively from a 3.0–3.6V supply. The device interprets logic levels per its VIL/VIH thresholds (0.6V/2.0V), not voltage magnitude, enabling direct interface with 5V MCUs using appropriate level translation or open-drain pull-ups.
AT49LV002T-70PC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49LV002T-70PC FAQ
1.How can I place an order for AT49LV002T-70PC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV002T-70PC 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-70PC reliable?
The price and inventory of AT49LV002T-70PC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV002T-70PC is usually 5 days.
3.What payment methods are accepted for AT49LV002T-70PC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV002T-70PC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV002T-70PC?
AT49LV002T-70PC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV002T-70PC 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-70PC?
For technical support, including AT49LV002T-70PC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV002T-70PC requirements.
6.How does Aetrix verify that AT49LV002T-70PC is sourced from the original manufacturer or authorized distributors?
All AT49LV002T-70PC 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-70PC meets industry standards.
7.What is the process for return or replacement of AT49LV002T-70PC?
All AT49LV002T-70PC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV002T-70PC, 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-70PC part is unused and in its original packaging.
Return procedure for AT49LV002T-70PC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV002T-70PC Tags
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AT24C02C-XHM-T
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