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Microchip Technology AT49SV322D-80TU
- Part No.:
- AT49SV322D-80TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49SV322D-80TU.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,152
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Product details
Overview
AT49SV322D-80TU from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16) 1.8 V-only parallel Flash memory IC with 80 ns access time, sector erase architecture (71 sectors), and single-voltage read/write operation (1.65–1.95 V). It supports in-system programming and is used in embedded boot code storage, firmware update modules, and industrial controller nonvolatile memory.
For engineers reviewing the AT49SV322D-80TU datasheet, AT49SV322D-80TU pinout, AT49SV322D-80TU application, or AT49SV322D-80TU equivalent, key selection considerations include sector lockdown capability, suspend/resume for concurrent read/program operations, CFI compliance, TSOP-48 package compatibility, and VPP-controlled write acceleration at 10 V.
Technical Context
The AT49SV322D-80TU implements a command-based parallel interface with CE/OE/WE control logic and an internal write state machine managing program, erase, suspend, and configuration register operations. Its architecture includes dual-mode status reporting (Data Polling on I/O7 and Toggle Bit on I/O6) and hardware-level protection via VPP voltage sensing and RESET-initiated initialization.
It features a 128-bit protection register (factory-programmed Block A + user-programmable/lockable Block B), Common Flash Interface (CFI) query mode (entry via 98h at address 55h), and configurable status behavior via a two-bit configuration register that determines automatic return to read mode or requirement of Product ID Exit after successful operations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words); enables storage of large boot images or firmware binaries in compact footprint. |
| Access Time | 80 ns; ensures deterministic timing for high-speed microprocessor bus interfacing without wait states. |
| Supply Voltage | 1.65 V to 1.95 V; compatible with modern low-voltage SoC power domains and eliminates need for level shifters. |
| Sector Architecture | 71 sectors: sixty-three 64 KB (32K-word) + eight 8 KB (4K-word); allows granular firmware updates without full chip erase. |
| Program Time | 10 µs per word; supports rapid field firmware patching and reduces system downtime during updates. |
| Erase Time | 100 ms per sector; balances speed and reliability for wear-leveling-aware embedded applications. |
| End-of-Operation Detection | RDY/BUSY pin + Data Polling (I/O7) + Toggle Bit (I/O6); provides multiple synchronous/asynchronous methods for host software coordination. |
| Endurance | ≥100,000 erase cycles per sector; meets long-life requirements for industrial controllers and telecom equipment. |
Pinout & Package
AT49SV322D-80TU is packaged in a 48-lead Thin Small Outline Package (TSOP Type I, 12 mm × 20 mm), pin-compatible with industry-standard parallel Flash footprints. Pin functions are electrically identical across TSOP and CBGA variants; this part uses the TSOP-48 configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A0–A19 used for main memory, A20 selects upper half of address space. |
| I/O0–I/O15 | Data Inputs/Outputs | 16-bit bidirectional data bus; supports word-wide reads/writes and dual-word programming when VPP = 9.5 V. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, enabling shared bus architectures. |
| WE | Write Enable | Active-low write strobe; latches command/data on rising edge; used with CE/OE to initiate all program/erase commands. |
| RDY/BUSY | Open-Drain Status Output | Actively pulled low during internal operations; supports wired-OR connection across multiple Flash devices on same status line. |
| VPP | Write Protection & Acceleration | At <0.4 V: inhibits program/erase; at ≥1.65 V: enables normal operation; at 10.0 V: enables accelerated dual-word programming. |
| RESET | Hardware Initialization | Active-low signal halts ongoing operations and forces device into read/standby mode; required to exit suspended states or recover from failed commands. |
| NC | No Connect | Pin 23 (TSOP top view) is unconnected; must be left floating or tied to ground per board layout best practices. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Lockdown | Per-sector write-protection enabled via six-cycle command; preserves secure boot code while allowing runtime updates to application sectors. |
| Erase/Program Suspend | Interrupt active erase or program to read/program other sectors; enables real-time firmware updates without halting system execution. |
| Common Flash Interface (CFI) | Standardized query table accessible at address 55h with 98h command; enables auto-configuration of drivers and cross-vendor firmware portability. |
| 128-bit Protection Register | Factory-block A (64-bit unique ID) + user-block B (64-bit programmable/lockable); supports secure device authentication and anti-cloning. |
| Single-Pulse Word Program Mode | Enter via six-word sequence; thereafter only single WE pulse needed per word write-reduces host CPU overhead during bulk programming. |
| Hardware Data Protection | VCC sense (<1.65 V inhibits programming), 10 ms power-on delay, and VPP voltage monitoring prevent accidental writes during power ramp or brownout. |
Applications
| Industrial PLC Firmware Storage | Automotive Infotainment Boot Memory |
|---|---|
Use Scenario: Storing bootloader and safety-critical firmware in programmable logic controllers operating in harsh temperature environments (-40°C to +85°C). IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic 80 ns read access to initialize FPGA and MCU subsystems at power-up. Use Value: Sector lockdown protects bootloader integrity; 100,000-cycle endurance ensures >10-year field life under periodic firmware updates. | Use Scenario: Holding certified boot code and OS kernel for head-unit microcontrollers requiring AEC-Q100-compliant external Flash. IC Role / Device Role / Timing Role: Parallel-connected Flash memory mapped into processor address space for zero-wait-state execution of safety-critical startup routines. Use Value: CFI support enables standardized driver integration across vehicle platforms; VPP-based write acceleration reduces OTA update time by ~40%. |
| Medical Imaging System Configuration | Network Equipment FPGA Bitstream Storage |
Use Scenario: Retaining calibration tables, device profiles, and regulatory-compliant configuration data in portable ultrasound and MRI subsystems. IC Role / Device Role / Timing Role: Secure, lockable Flash storing encrypted parameter sets accessed via dedicated microcontroller bus interface. Use Value: 128-bit protection register enables cryptographic binding of configuration data to specific hardware units; sector erase isolates updates without risking calibration integrity. | Use Scenario: Storing reconfigurable FPGA bitstreams for telecom switches and baseband processing units requiring hot-swap firmware replacement. IC Role / Device Role / Timing Role: High-reliability parallel Flash acting as persistent configuration store for Xilinx/Intel FPGAs during power cycling. Use Value: Erase suspend allows partial bitstream reload while maintaining active packet forwarding; RDY/BUSY pin synchronizes FPGA configuration engine with Flash readiness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201C-80-4I-EKE | 32 Mbit, 1.8 V, 80 ns, TSOP-48; lacks CFI, no VPP pin, no suspend/resume, 100K cycle rating. | Lower-cost alternative where boot code immutability and concurrent read/program are not required. | Select when CFI-driven auto-detection and sector-level suspend are unnecessary; verify absence of VPP dependency in existing designs. |
| MX29LV320ETTI-70G | 32 Mbit, 3.0 V, 70 ns, TSOP-48; supports CFI and sector protection but requires 3 V supply and has no suspend/resume. | Drop-in replacement only if system supports 3 V I/O and does not rely on 1.8 V operation or suspend functionality. | Choose only if migrating from legacy 3 V systems; incompatible with 1.8 V domains and cannot replicate AT49SV322D-80TU's real-time update capability. |
Compared with SST39VF3201C-80-4I-EKE and MX29LV320ETTI-70G, the AT49SV322D-80TU uniquely combines 1.8 V operation, CFI compliance, suspend/resume, and VPP-accelerated programming-making it irreplaceable in next-generation low-power, field-upgradable embedded systems requiring both security and flexibility.
Availability
AT49SV322D-80TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive infotainment boot memory, and medical imaging system configuration requiring stable component supply and long-term lifecycle support.
Supply support for AT49SV322D-80TU 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 is a global semiconductor company specializing in microcontrollers, analog devices, Flash memory, and security ICs, with a strong heritage in embedded Flash solutions through its acquisition of Atmel.
The AT49SV322D-80TU belongs to Microchip's legacy parallel Flash product line, designed specifically for reliable, in-system programmable nonvolatile storage in resource-constrained embedded systems requiring deterministic timing and robust data retention.
FAQ
What is the correct VPP voltage for standard versus accelerated programming of the AT49SV322D-80TU?
The AT49SV322D-80TU requires VPP ≥ 1.65 V for standard program and erase operations. For accelerated dual-word programming, VPP must be set to 10.0 V. If VPP falls below 0.4 V, all program/erase functions are inhibited. The VPP pin must never be left floating and must be actively driven to one of these defined voltage levels during operation.
Does the AT49SV322D-80TU support true simultaneous read and program operations?
Yes-the AT49SV322D-80TU supports Erase Suspend and Program Suspend features. When erasing one sector, the host can suspend the operation and read or program any other non-suspending sector. Similarly, during word programming, the host can suspend and read from non-programming sectors. This enables real-time firmware updates without halting system execution.
How many sectors does the AT49SV322D-80TU have, and what are their sizes?
The AT49SV322D-80TU contains 71 sectors: sixty-three 64 KB (32K-word) sectors and eight 8 KB (4K-word) sectors. Sector addresses range from SA0 (00000h–00FFFh) to SA70 (1FF8000h–1FFFFFFh), with detailed mapping provided in the Sector Address Table (page 14 of datasheet 3623A).
Can the AT49SV322D-80TU be used in a 3.3 V system?
No-the AT49SV322D-80TU is a 1.8 V-only device with absolute maximum input voltage of VCC + 0.6 V. While address and control inputs tolerate up to 5.5 V, the core supply (VCC) must remain within 1.65–1.95 V. Using 3.3 V will exceed absolute maximum ratings and cause permanent damage. Level-shifting is not supported; a true 1.8 V supply is mandatory.
What happens if a sector lockdown command is issued to the AT49SV322D-80TU?
Issuing the six-cycle Sector Lockdown command to a sector makes that sector permanently read-only until the next power cycle or RESET assertion. Once locked, the sector cannot be erased or programmed-even with chip erase. Lockdown is optional per sector and is commonly used to protect boot code while allowing application updates elsewhere in the memory array.
AT49SV322D-80TU 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:
- 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 70ns
- Access Time:
- 80 ns
- Voltage - Supply:
- 1.65V ~ 1.95V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49SV322D-80TU FAQ
1.How can I place an order for AT49SV322D-80TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49SV322D-80TU 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 AT49SV322D-80TU reliable?
The price and inventory of AT49SV322D-80TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49SV322D-80TU is usually 5 days.
3.What payment methods are accepted for AT49SV322D-80TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49SV322D-80TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49SV322D-80TU?
AT49SV322D-80TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49SV322D-80TU 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 AT49SV322D-80TU?
For technical support, including AT49SV322D-80TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49SV322D-80TU requirements.
6.How does Aetrix verify that AT49SV322D-80TU is sourced from the original manufacturer or authorized distributors?
All AT49SV322D-80TU 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 AT49SV322D-80TU meets industry standards.
7.What is the process for return or replacement of AT49SV322D-80TU?
All AT49SV322D-80TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49SV322D-80TU, 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 AT49SV322D-80TU part is unused and in its original packaging.
Return procedure for AT49SV322D-80TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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