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Microchip Technology AT49LV320-90TI
- Part No.:
- AT49LV320-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV320-90TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,876
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Product details
Overview
AT49LV320-90TI from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply 3.0V Flash memory IC used for nonvolatile code and data storage in embedded systems. It features 85 ns access time, sector erase architecture with 71 independently lockable sectors (63 × 64KB + 8 × 8KB), 15 µs word program time, and suspend/resume capability for concurrent read/program operations during erase.
For engineers reviewing the AT49LV320-90TI datasheet, AT49LV320-90TI pinout, AT49LV320-90TI application, or AT49LV320-90TI equivalent, this page delivers verified technical context, real-world use cases, validated alternatives, and supply-chain-ready availability details - all grounded in the official Microchip AT49BV/LV320(T) datasheet (Rev. 1494H).
Technical Context
The AT49LV320-90TI implements a command-based Flash architecture with dual-mode addressing (x8/x16), CE/OE/WE control logic to prevent bus contention, and hardware reset-initiated state recovery. Its internal write state machine handles autonomous program/erase timing without external clocks.
It supports three status detection methods: READY/BUSY pin (open-drain, active-low), Data Polling on I/O7, and Toggle Bit on I/O6 - all configurable via a user-settable status register. Sector lockdown and 128-bit protection register provide hardware-level security for boot code and firmware integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit or 4,194,304 × 8-bit) |
| Access Time | 90 ns max - guarantees deterministic read latency for real-time firmware fetch |
| Supply Voltage | 2.65–3.3 V (BV variant) - compatible with 3.0V system rails and low-power operation |
| Program Time | 15 µs per word - enables fast field firmware updates without long blocking cycles |
| Erase Time | 200 ms per sector - balances speed and endurance for partial reprogramming |
| Standby Current | 10 µA - suitable for battery-backed or always-on embedded applications |
| Sector Architecture | 71 sectors (63 × 64KB + 8 × 8KB) - allows granular, non-disruptive code/data updates |
Pinout & Package
AT49LV320-90TI is packaged in a 48-pin TSOP Type I (Thin Small Outline Package), pin-compatible with industry-standard JEDEC MO-141AC. The device operates exclusively in x16 mode (I/O0–I/O15 active); BYTE pin is not implemented - unlike AT49LV321 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A-1 not used (x16-only) |
| I/O0–I/O15 | Data I/O (x16) | Bidirectional 16-bit data path; no byte-mode support - simplifies controller interface |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE high disables outputs regardless of CE/WE |
| RESET | Hardware Initialization | Asynchronous active-low signal that halts ongoing operations and forces read/standby mode |
| VPP | Write Protection Control | Enables programming/erasing only when ≥1.65 V; inhibits writes if <0.8 V - prevents accidental corruption |
| RDY/BUSY | Status Output | Open-drain active-low signal indicating active program/erase - supports wired-OR multi-device monitoring |
| VCCQ | Output Driver Supply | Separate 2.65–3.3 V rail for I/O drivers - isolates output noise from core logic supply |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase with Lockdown | 71 individually lockable sectors enable secure boot code retention while updating application firmware |
| Erase/Program Suspend | Allows reading from or programming any non-erasing sector during active erase - critical for real-time interrupt handling |
| 128-bit Protection Register | Factory-programmed Block A + user-writable/lockable Block B - supports unique device identity and firmware binding |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns), and VPP voltage monitoring prevent spurious writes during power transients |
| Status Detection Flexibility | Configurable I/O7 polling or I/O6 toggle bit - lets designers choose between pin count vs. software polling overhead |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in harsh factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing deterministic 90 ns read access for real-time instruction fetch and secure sector-locked bootloader execution. Use Value: Sector lockdown prevents unauthorized modification of safety-critical boot routines; low 10 µA standby current extends uptime in battery-buffered backup modes. |
Use Scenario: Holding certified boot firmware and calibration data in Class II medical instruments requiring traceable, tamper-resistant memory with lifecycle compliance. IC Role / Device Role / Timing Role: Secure Flash memory IC delivering verified read integrity and hardware-enforced write protection for FDA-regulated firmware images. Use Value: 128-bit protection register enables device-specific cryptographic binding; RDY/BUSY pin supports deterministic watchdog timeout coordination during firmware update. |
| Automotive Infotainment System Updates | Networking Equipment Configuration Storage |
Use Scenario: Supporting over-the-air (OTA) firmware patches in automotive head units where partial sector rewrites must avoid disrupting active audio/video playback. IC Role / Device Role / Timing Role: Concurrent-access Flash memory enabling background sector erase suspension while servicing real-time media interrupts via I/O reads. Use Value: Suspend/resume feature allows uninterrupted UI responsiveness during firmware update; 200 ms sector erase time minimizes service window duration. |
Use Scenario: Storing switch/router configuration tables and MAC address tables in enterprise networking gear requiring high reliability and rapid restore after power loss. IC Role / Device Role / Timing Role: High-endurance Flash memory IC with 25 mA active current and robust hardware write protection for mission-critical configuration persistence. Use Value: VPP pin-based write inhibit prevents corruption during brown-out conditions; CE/OE dual-enable logic ensures clean bus isolation during hot-swap events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201-90-4C-EKE | 48-pin TSOP, 32 Mbit, 90 ns, 3.0V, but uses different command set and lacks RDY/BUSY pin | No hardware suspend/resume; requires software polling only - increases CPU load during erase | Choose when legacy SST39 command compatibility is required and suspend functionality is not needed |
| MX29LV320ETTI-90G | 48-pin TSOP, 32 Mbit, 90 ns, 3.0V, includes RDY/BUSY and suspend - but sector map differs (64 × 64KB) | Uniform 64KB sectors simplify partitioning but lack fine-grained 8KB boot sectors for small bootloader images | Prefer for new designs needing uniform sector sizing and broader distributor availability |
Compared with SST39VF3201-90-4C-EKE and MX29LV320ETTI-90G, the AT49LV320-90TI uniquely combines 8KB boot sectors, hardware suspend/resume, and a dedicated RDY/BUSY pin - making it optimal for real-time embedded systems requiring concurrent access and secure boot integrity.
Availability
AT49LV320-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, automotive infotainment system updates, networking equipment configuration storage, and aerospace data logging requiring stable component supply across extended product lifecycles.
Supply support for AT49LV320-90TI 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
Microchip Technology acquired Atmel in 2016 and maintains full support for the legacy AT49LV series. Microchip is a global leader in microcontrollers, analog, and Flash memory solutions with ISO 9001-certified manufacturing and AEC-Q100 qualified automotive processes.
The AT49LV320-90TI belongs to Microchip's industrial-grade parallel Flash memory product line, designed specifically for reliable, long-lifecycle code storage in embedded systems where firmware integrity, sector-level security, and real-time interrupt responsiveness are critical.
FAQ
What is the operating voltage range for AT49LV320-90TI?
The AT49LV320-90TI operates within a single 2.65V to 3.3V supply range (BV variant). This narrow 3.0V-compatible window ensures compatibility with modern low-voltage microcontroller buses while maintaining sufficient noise margin. VPP must be ≥1.65V for write/erase operations, and the device includes built-in VCC sense circuitry that inhibits programming if VCC drops below 1.8V - a key reliability feature for AT49LV320-90TI in unstable power environments.
Does AT49LV320-90TI support byte-mode operation?
No, AT49LV320-90TI does not support byte-mode operation. Unlike the AT49LV321 family, the AT49LV320-90TI is fixed in x16 mode only - I/O0–I/O15 are always active, and the BYTE pin is not implemented. This eliminates mode-selection complexity and ensures deterministic 16-bit data path behavior, making AT49LV320-90TI ideal for systems with native 16-bit data buses such as older ARM7 or SH-3 microcontrollers.
How does sector lockdown work on AT49LV320-90TI?
Sector lockdown on AT49LV320-90TI is enabled per-sector using a six-bus-cycle command sequence. Once activated, a locked sector becomes permanently read-only until the next power cycle or RESET assertion. This protects boot code from accidental overwrite while allowing other sectors to be updated. The AT49LV320-90TI supports 71 independent sectors (63 × 64KB + 8 × 8KB), and lockdown status can be verified via software read at address 00002H - a critical safeguard for AT49LV320-90TI in safety-critical firmware deployments.
What status detection methods does AT49LV320-90TI provide?
AT49LV320-90TI offers three complementary status detection methods: an open-drain RDY/BUSY pin (active-low), Data Polling on I/O7, and Toggle Bit on I/O6. All are configurable via a two-bit status register. RDY/BUSY enables hardware interrupt-driven operation; Data Polling reduces pin count at the cost of software polling; Toggle Bit provides a simple hardware-free alternative. These options give designers flexibility to optimize AT49LV320-90TI integration based on MCU resource constraints and real-time requirements.
Is AT49LV320-90TI pin-compatible with AT49BV320-90TI?
Yes, AT49LV320-90TI is pin-compatible with AT49BV320-90TI - both use identical 48-pin TSOP Type I packaging and share identical pin functions, address/data mapping, and command sets. The primary difference is supply voltage: AT49BV320-90TI operates at 3.0–3.6V, while AT49LV320-90TI operates at 2.65–3.3V. This makes AT49LV320-90TI a direct drop-in replacement in 3.0V systems, offering lower active and standby current - a verified compatibility confirmed in Microchip's AT49BV/LV320(T) datasheet Rev. 1494H.
AT49LV320-90TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-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:
- 32Mbit
- Memory Organization:
- 4M x 8, 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 150µs
- 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:
- 48-TSOP
AT49LV320-90TI FAQ
1.How can I place an order for AT49LV320-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV320-90TI 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 AT49LV320-90TI reliable?
The price and inventory of AT49LV320-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV320-90TI is usually 5 days.
3.What payment methods are accepted for AT49LV320-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV320-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV320-90TI?
AT49LV320-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV320-90TI 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 AT49LV320-90TI?
For technical support, including AT49LV320-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV320-90TI requirements.
6.How does Aetrix verify that AT49LV320-90TI is sourced from the original manufacturer or authorized distributors?
All AT49LV320-90TI 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 AT49LV320-90TI meets industry standards.
7.What is the process for return or replacement of AT49LV320-90TI?
All AT49LV320-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV320-90TI, 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 AT49LV320-90TI part is unused and in its original packaging.
Return procedure for AT49LV320-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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