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Microchip Technology AT49LV001T-90PI
- Part No.:
- AT49LV001T-90PI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-DIP (0.600", 15.24mm)
- Datasheet:
-
AT49LV001T-90PI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32DIP
- Quantity:
- Payment:
- Shipping:
Inventory:4,684
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Product details
Overview
AT49LV001T-90PI from Atmel is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V Flash memory IC with 90 ns read access time, sector-based architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), and hardware data protection. It supports in-system reprogramming for embedded firmware storage in microcontroller-based industrial controllers.
For engineers reviewing the AT49LV001T-90PI datasheet, AT49LV001T-90PI pinout, AT49LV001T-90PI application, or AT49LV001T-90PI equivalent, this page delivers verified timing specs, boot-block lockout behavior, DATA polling/Toggle Bit status detection, and PLCC-32 package compatibility for legacy board replacement and firmware update design.
Technical Context
The AT49LV001T-90PI implements a standard parallel Flash interface with CE/OE/WE control logic, supporting EPROM-like read operation and command-based byte programming, sector erase, and chip erase. Its internal program control logic eliminates need for external high-voltage programming circuitry.
It features dual-mode boot block protection: lockout activation prevents reprogramming of the 16 KB boot sector (address range 1C000H–1FFFFH), and RESET-pin override (12 V) enables emergency reprogramming. Sector erase targets specific 8 KB parameter or 32/64 KB main memory blocks using six-cycle command sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - supports full firmware image storage for 8-bit microcontrollers |
| Read Access Time | 90 ns - meets timing requirements for 11 MHz bus interfaces without wait states |
| Supply Voltage | 3.0 V to 3.6 V - compatible with regulated 3.3 V systems; no 5 V support |
| Active Current | 25 mA - low power draw during firmware reads in battery-backed or energy-constrained applications |
| Standby Current | 50 µA CMOS - enables ultra-low-power retention in always-on embedded systems |
| Erase Cycle Time | 10 seconds max - deterministic sector/chip erase duration for predictable firmware update windows |
| Byte Programming Time | 30 µs typical - enables rapid field updates of small configuration or calibration data segments |
| End-of-Operation Detection | DATA Polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware |
Pinout & Package
AT49LV001T-90PI is packaged in a 32-lead Plastic Dual In-line Package (PDIP), 0.600" wide (32P6), with through-hole mounting and industry-standard pin spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing (00000H–1FFFFH) |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; latched on WE/CE rising edge during programming |
| 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 control; used with CE to prevent bus contention during shared-memory access |
| WE | Write Enable | Active-low write strobe; falling edge latches address; rising edge latches data during programming |
| RESET | Reset Input | Active-low reset; 12 V applied enables boot block override; not available on N-suffix variants |
| VCC | Power Supply | +3.0 V to +3.6 V supply; internal voltage regulation ensures stable core operation |
| GND | Ground | Reference ground for all I/O and internal logic; decoupling capacitor required at pin |
| NC | No Connect | Pin 32 in PDIP package - must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB protected region (1C000H–1FFFFH) prevents accidental overwrite of bootloader code; enabled via 6-cycle command sequence |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filter (<15 ns pulse rejection), and control-line inhibit (OE low/CE high/WE high blocks writes) |
| Sector Erase Architecture | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) enables granular firmware partitioning |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling eliminates polling delays and simplifies host driver implementation |
| Single 3.3 V Supply Operation | No external 5 V or 12 V required for read/write/erase - reduces BOM count and PCB complexity in modern low-voltage designs |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing immutable bootloader and field-upgradable application firmware in DIN-rail mounted programmable logic controllers. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing direct-mapped instruction fetch and data storage with 90 ns read latency. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; sector erase enables safe patch deployment without full reflash. |
Use Scenario: Holding certified bootloader and safety-critical initialization routines in FDA-regulated diagnostic equipment. IC Role / Device Role / Timing Role: Secure, reprogrammable firmware storage with hardware-level write protection and deterministic erase timing. Use Value: RESET-pin override (12 V) allows authorized recovery of corrupted boot code; 50 µA standby current extends battery backup runtime. |
| Legacy Embedded Instrumentation | Automotive ECU Calibration Storage |
Use Scenario: Replacing obsolete EPROMs in test equipment requiring in-circuit firmware updates without socket removal. IC Role / Device Role / Timing Role: Pin-compatible Flash memory with EPROM read protocol and CE/OE/WE control interface. Use Value: 32P6 PDIP package enables drop-in replacement; 90 ns access matches original EPROM timing margins. |
Use Scenario: Storing vehicle-specific calibration maps and sensor compensation tables in engine control units with infrequent field updates. IC Role / Device Role / Timing Role: High-reliability Flash memory supporting 10,000 write cycles and -40°C to +85°C industrial temperature operation. Use Value: Parameter block sectors (8 KB each) isolate calibration data from application code; hardware VCC sensing prevents corruption during brown-out events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 40 ns faster read (50 ns), 3.0–3.6 V supply, same 1 Mbit density and PLCC/PDIP packaging | Higher performance read path; lacks RESET-pin override for boot block unlock | Preferred when system bus speed exceeds 11 MHz and boot block override is not required |
| MX29LV001CTTI-90G | Same 90 ns access, 3.0–3.6 V, 1 Mbit, but uses different command set and lacks hardware RESET override | Requires firmware adaptation for command sequences; no 12 V boot block recovery path | Valid for cost-sensitive replacements where existing driver supports MXIC command protocol |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49LV001T-90PI uniquely provides 12 V RESET override for boot block reprogramming and Atmel's proven sector-lock architecture-critical for safety-critical firmware recovery and long-term field maintenance.
Availability
AT49LV001T-90PI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and legacy embedded instrumentation requiring stable component supply and long-lifecycle support.
Supply support for AT49LV001T-90PI 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) is a semiconductor manufacturer specializing in microcontrollers, Flash memory, and secure authentication devices.
The AT49LV series was designed for 3.3 V embedded systems needing reliable, in-system reprogrammable nonvolatile storage with robust data integrity features including boot block protection and hardware write inhibition.
FAQ
What is the memory organization of the AT49LV001T-90PI?
The AT49LV001T-90PI contains 1 Mbit of Flash memory organized as 131,072 words × 8 bits (128K × 8). Its physical address space spans 00000H to 1FFFFH, with the boot block located at 1C000H–1FFFFH, two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB).
Does the AT49LV001T-90PI support 5 V operation?
No, the AT49LV001T-90PI operates exclusively within 3.0 V to 3.6 V. It is not 5 V tolerant: applying >3.6 V to VCC or any input pin risks permanent damage. The "LV" suffix explicitly denotes low-voltage operation, distinguishing it from the 2.7–3.6 V "BV" variant.
How is boot block protection enabled on the AT49LV001T-90PI?
Boot block protection is enabled by executing a precise six-cycle command sequence: load AAH to 5555H, 55H to 2AAAH, 80H to 5555H, then AAH/55H/40H to 5555H/2AAAH/5555H. Once activated, the 16 KB boot block (1C000H–1FFFFH) cannot be erased or programmed at ≤5.5 V.
Can the AT49LV001T-90PI be reprogrammed in-circuit without removing it from the board?
Yes, the AT49LV001T-90PI supports full in-system reprogramming via its standard parallel interface. No external high-voltage programming signals are needed-only 3.3 V supply and valid CE/OE/WE timing. Command-based sector erase and byte programming enable field firmware updates without board removal.
What package type is used for the AT49LV001T-90PI?
The AT49LV001T-90PI uses a 32-lead Plastic Dual In-line Package (PDIP), 0.600" wide (ordering code suffix "P"), designated as package type 32P6. This through-hole package is pin-compatible with legacy EPROMs and supports manual prototyping and wave soldering.
AT49LV001T-90PI 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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 32-PDIP
AT49LV001T-90PI FAQ
1.How can I place an order for AT49LV001T-90PI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001T-90PI 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 AT49LV001T-90PI reliable?
The price and inventory of AT49LV001T-90PI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001T-90PI is usually 5 days.
3.What payment methods are accepted for AT49LV001T-90PI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001T-90PI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001T-90PI?
AT49LV001T-90PI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001T-90PI 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 AT49LV001T-90PI?
For technical support, including AT49LV001T-90PI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001T-90PI requirements.
6.How does Aetrix verify that AT49LV001T-90PI is sourced from the original manufacturer or authorized distributors?
All AT49LV001T-90PI 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 AT49LV001T-90PI meets industry standards.
7.What is the process for return or replacement of AT49LV001T-90PI?
All AT49LV001T-90PI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001T-90PI, 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 AT49LV001T-90PI part is unused and in its original packaging.
Return procedure for AT49LV001T-90PI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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