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Microchip Technology AT49LV001-90TI
- Part No.:
- AT49LV001-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV001-90TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,389
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Product details
Overview
AT49LV001-90TI from Atmel is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V in-system reprogrammable Flash memory with 90 ns read access time, 10-second chip erase cycle, byte-programming at 30 µs/byte typical, and hardware data protection including VCC sense and noise filtering. It is used for firmware storage and boot code retention in industrial embedded controllers.
For engineers reviewing the AT49LV001-90TI datasheet, AT49LV001-90TI pinout, AT49LV001-90TI application, or AT49LV001-90TI equivalent, key selection considerations include its 32-pin TSOP package, boot block programming lockout (16 KB, address range 1C000H–1FFFFH), sector-based erase architecture, and industrial temperature range (−40°C to +85°C).
Technical Context
The AT49LV001-90TI implements a sector-organized Flash architecture with one 16-Kbyte boot block, two 8-Kbyte parameter blocks, and two main memory blocks (32 KB and 64 KB). Its command interface uses standard microprocessor timing with WE/CE/OE control and supports software command sequences for chip erase, sector erase, byte programming, and boot lockout enable/disable.
It features dual end-of-operation detection via DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling), and includes hardware safeguards: VCC sense below 1.8 V inhibits programming, and <15 ns input pulses are filtered out. RESET pin enables boot block override at 12 V, though this feature is not available on N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for compact boot firmware and configuration data. |
| Read Access Time | 90 ns max - ensures compatibility with 11 MHz bus timing in legacy microcontroller systems. |
| Supply Voltage | 3.0 V to 3.6 V - single 3.3 V rail operation eliminates need for voltage translators or dual supplies. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables field firmware updates without excessive downtime. |
| Byte Programming Time | 30 µs typical - supports efficient patching of small code/data segments without bulk reprogramming. |
| Endurance | 10,000 write/erase cycles - suitable for applications requiring infrequent but reliable field updates over product lifetime. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments including motor drives and PLC I/O modules. |
| Standby Current | 50 µA CMOS - minimizes power draw in sleep modes of battery-backed or energy-sensitive systems. |
Pinout & Package
AT49LV001-90TI is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), pin-compatible with industry-standard 32-pin Flash footprints. Pin 1 is located at the top-left corner (marking dot adjacent), with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper/lower 64K region. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for read, program, and identification operations; TTL-compatible I/O levels. |
| 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 shared-memory access. |
| WE | Write Enable | Active-low control for programming/erase command latching; falling edge captures address, rising edge latches data. |
| RESET* | Reset Input | Active-low reset; at 12 V enables boot block override - critical for recovery after lockout activation. |
| VCC | Power Supply | 3.0–3.6 V supply; internal regulation ensures stable core voltage across operating range. |
| GND | Ground | Signal and power reference; decoupling capacitor (0.1 µF) required near VCC pin per layout guidelines. |
| NC | No Connect | Pin 31 (TSOP); must remain unconnected - floating or driven signals may cause undefined behavior. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-KB protected region (1C000H–1FFFFH) prevents accidental overwrite of secure boot code; enabled via 6-byte command sequence. |
| Sector Erase Flexibility | Independent erasure of two 8-KB parameter blocks and two main memory blocks (32 KB / 64 KB) enables modular firmware updates without full chip erase. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and control-line interlock (OE high/CE high/WE high) prevent spurious writes during power transients or EMI events. |
| End-of-Operation Detection | Dual methods: DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) allow host CPU to poll status without fixed delays or external timers. |
| 12-V RESET Override | Applying 12 V ±0.5 V to RESET pin during erase/program bypasses boot block lockout - essential for factory recovery and field service. |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program storage with fast 90 ns read access enabling real-time instruction fetch for deterministic scan-cycle execution. Use Value: Sector architecture allows independent update of I/O driver modules without disrupting ladder logic runtime; 10,000-cycle endurance supports 10+ years of maintenance cycles. | Use Scenario: Holding secure boot code and hardware initialization routines in microcontroller-based medical devices requiring regulatory-compliant firmware integrity. IC Role / Device Role / Timing Role: Boot block-protected Flash providing tamper-resistant startup sequence; RESET-driven 12 V override enables certified recovery procedures. Use Value: Boot lockout prevents unauthorized modification of safety-critical boot code; industrial temp rating ensures reliability in sterilization-cycle thermal stress. |
| Telecom Line Card Configuration | Automotive Body Control Module |
Use Scenario: Storing line-specific calibration data, protocol stacks, and fault logs in carrier-grade DSLAM line cards operating continuously in central office cabinets. IC Role / Device Role / Timing Role: Parameter block storage (two 8-KB sections) for field-upgradable DSP coefficients and vendor-specific MIB tables. Use Value: Fast 10-second chip erase enables overnight firmware rollouts across thousands of units; 50 µA standby current reduces thermal load in densely packed chassis. | Use Scenario: Retaining vehicle-specific configuration (e.g., door module settings, lighting profiles) in automotive body control units exposed to under-hood temperature extremes. IC Role / Device Role / Timing Role: Main memory block storage (64 KB) for EEPROM-emulation via wear-leveling algorithms, leveraging byte-programmability and sector erase. Use Value: −40°C to +85°C qualification meets AEC-Q100 Grade 2 requirements; hardware write protection prevents corruption during load dump events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001-90TI | 2.7–3.6 V supply range; includes BV-series higher-voltage tolerance; same pinout and command set. | Broader VCC range supports mixed 2.7 V/3.3 V system designs; identical sector map and lockout behavior. | Select when board-level VCC margin exceeds 3.0 V or when interoperability with legacy BV-family tooling is required. |
| SST39VF010-90-4C-NHE | 90 ns access, 3.0–3.6 V, 1 Mbit, but uses different command set (SST-style) and lacks RESET-based boot override. | No hardware boot block override; relies solely on software lock/unlock; no 12 V RESET recovery path. | Choose only if existing SST firmware infrastructure exists; requires validation of command translation and absence of field-recovery requirement. |
Compared with AT49BV001-90TI and SST39VF010-90-4C-NHE, the AT49LV001-90TI provides tighter VCC control (3.0–3.6 V only), guaranteed boot block lockout override via 12 V RESET, and Atmel's documented sector-address mapping - making it preferable for safety-critical or field-serviceable industrial deployments.
Availability
AT49LV001-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, and telecom line card configuration requiring stable component supply across extended lifecycle programs.
Supply support for AT49LV001-90TI 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 ICs for industrial, automotive, and consumer applications.
The AT49LV001-90TI belongs to Atmel's Battery-Voltage™ Flash memory family, designed specifically for reliable, low-voltage in-system reprogramming in space-constrained industrial and embedded systems where firmware integrity and field upgrade capability are critical.
FAQ
What is the exact memory organization of the AT49LV001-90TI?
The AT49LV001-90TI contains 1 Mbit (131,072 × 8) of Flash memory, organized as 128K words × 8 bits. Its physical address space spans 00000H to 1FFFFH (128 KB), with sector layout: boot block (1C000H–1FFFFH, 16 KB), parameter block 1 (1A000H–1BFFFH, 8 KB), parameter block 2 (18000H–19FFFH, 8 KB), main memory block 1 (10000H–17FFFH, 32 KB), and main memory block 2 (00000H–0FFFFH, 64 KB). This mapping is confirmed in the AT49BV/LV001(N)(T) datasheet revision 1110C.
Does the AT49LV001-90TI support true 3.3 V-only operation without 5 V or 12 V auxiliary supplies?
Yes, the AT49LV001-90TI operates exclusively from a 3.0–3.6 V supply for all functions - read, program, and erase - with no requirement for high-voltage pumps or external VPP. The 12 V applied to the RESET pin is strictly for boot block override and is not needed for normal operation; all command sequences execute using only VCC. This makes the AT49LV001-90TI compatible with standard 3.3 V logic systems.
How is boot block protection enabled and verified on the AT49LV001-90TI?
Boot block protection is enabled by executing 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. Verification is performed in Software Product Identification mode: reading address 1C002H returns I/O0 = high if lockout is active. This behavior is specific to the T-suffix variant and differs from the base AT49LV001, which uses 00002H.
What package type and lead count does the AT49LV001-90TI use?
The AT49LV001-90TI uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), designated as package code "32T" in Atmel's ordering information. It is pin-compatible with other 32-pin Flash memories in TSOP, PLCC, PDIP, and VSOP packages, but the TI suffix explicitly denotes the TSOP industrial-grade variant.
Can the AT49LV001-90TI be used in place of the AT49LV001-90JI or AT49LV001-90PI?
No - the AT49LV001-90TI is functionally identical to the AT49LV001-90JI (same industrial temperature range and electrical specs) but differs in package: TI = TSOP, JI = PLCC, PI = PDIP. Substitution requires PCB footprint compatibility. Electrical timing (90 ns access), VCC range (3.0–3.6 V), and command set are identical across all -90I variants; only mechanical form factor changes.
AT49LV001-90TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- 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:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49LV001-90TI FAQ
1.How can I place an order for AT49LV001-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001-90TI 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 AT49LV001-90TI reliable?
The price and inventory of AT49LV001-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001-90TI is usually 5 days.
3.What payment methods are accepted for AT49LV001-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001-90TI?
AT49LV001-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001-90TI 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 AT49LV001-90TI?
For technical support, including AT49LV001-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001-90TI requirements.
6.How does Aetrix verify that AT49LV001-90TI is sourced from the original manufacturer or authorized distributors?
All AT49LV001-90TI 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 AT49LV001-90TI meets industry standards.
7.What is the process for return or replacement of AT49LV001-90TI?
All AT49LV001-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001-90TI, 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 AT49LV001-90TI part is unused and in its original packaging.
Return procedure for AT49LV001-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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