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Microchip Technology AT49SV322DT-80TU
- Part No.:
- AT49SV322DT-80TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49SV322DT-80TU.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,723
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Product details
Overview
AT49SV322DT-80TU from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16) 1.8 V-only parallel Flash memory IC with sector erase architecture, 80 ns access time, and dual-package support (48-pin TSOP-II and 48-ball CBGA). It enables in-system reprogramming for embedded boot code storage in industrial controllers and communication modules.
For engineers reviewing the AT49SV322DT-80TU datasheet, AT49SV322DT-80TU pinout, AT49SV322DT-80TU application, or AT49SV322DT-80TU equivalent, key selection considerations include single-supply 1.65–1.95 V operation, sector lockdown for secure boot, suspend/resume capability during erase/program, CFI compliance, and 100,000 erase cycle endurance.
Technical Context
This device implements a command-based parallel interface with CE/OE/WE control logic and supports both chip- and sector-level erase via six-cycle software commands. Its internal write state machine handles pulse generation, while status reporting uses I/O pins (I/O3, I/O5–I/O7) and open-drain RDY/BUSY for real-time operation monitoring.
The architecture includes a 128-bit protection register (factory-programmed Block A + user-programmable Block B), configurable status bit behavior via a two-bit configuration register, and hardware data protection via VPP voltage sensing (0.4 V threshold) and VCC sense circuitry. Sector lockout is persistent until reset or power cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit words); supports 16-bit parallel data bus interfacing |
| Supply Voltage | 1.65 V to 1.95 V only; no 3.3 V or 5 V compatibility - requires dedicated 1.8 V rail |
| Access Time | 80 ns max; defines minimum read cycle time under full VCC and temperature range |
| Erase Architecture | 71 sectors total: sixty-three 64 KB sectors + eight 8 KB sectors; each individually lockable |
| Program Time | 10 µs per word; enables rapid field updates without external high-voltage generators |
| Erase Endurance | ≥100,000 cycles per sector; validated for long-life firmware storage in unattended systems |
| CFI Support | Compliant with Common Flash Interface v1.3; allows runtime auto-detection of geometry and timing parameters |
Pinout & Package
AT49SV322DT-80TU is available in a 48-pin TSOP-II (Type 1) package, pin-compatible with industry-standard 48-pin Flash footprints. Pin functions are electrically identical across TSOP and CBGA variants; mechanical layout differs but signal mapping is preserved.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A0–A19 used for sector selection, A20 for top/bottom boot configuration |
| I/O0–I/O15 | Data Bus | 16-bit bidirectional data path; supports word-wide reads/writes; level-shifted for 1.8 V I/O tolerance |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; prevents bus contention |
| OE | Output Enable | Active-low output control; places I/O pins in high-Z when deasserted; used with CE for read gating |
| WE | Write Enable | Active-low write strobe; latches address/data on rising edge during command sequences |
| RDY/BUSY | Status Output | Open-drain active-low signal; pulled low during erase/program; supports wired-OR multi-device monitoring |
| VPP | Program Voltage Control | Enables write/erase when ≥1.65 V; inhibits programming if <0.4 V; 10 V accelerates dual-word program mode |
| RESET | Hardware Reset | Active-low initialization input; halts ongoing operations and forces read/standby mode on release |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Suspend/Resume | Allows interruption of sector erase to read/program other sectors - critical for real-time firmware update without system freeze |
| Single-Pulse Word Program Mode | Reduces programming overhead by accepting single WE pulses after six-word entry sequence - cuts host CPU command latency |
| 128-bit Protection Register | Factory-block A + user-block B with lockout; enables secure boot signature storage and anti-cloning in production firmware |
| Top/Bottom Boot Block Configuration | Configurable via A20 pin at power-up; supports flexible boot loader placement in either memory region |
| Hardware Data Protection | VCC sense, 10 ms power-on delay, and VPP threshold enforcement prevent accidental writes during brown-out or power ramp |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot Memory |
|---|---|
Use Scenario: Storing field-upgradable firmware and configuration tables in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory mapped to processor address space; provides 80 ns read access for fast startup and deterministic instruction fetch. Use Value: Sector lockdown protects bootloader from corruption during field updates; 100,000 erase cycles ensure >10-year service life with quarterly firmware patches. | Use Scenario: Holding boot code and DSP microcode in carrier-grade line cards requiring hot-swap capability and zero-downtime upgrades. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to ARM9 or MIPS-based control processors; accessed via standard SRAM-like bus protocol. Use Value: Erase suspend allows background firmware validation while maintaining real-time traffic processing; CFI enables automatic driver adaptation across multiple Flash vendors. |
| Medical Imaging System BIOS | Automotive ADAS Camera Module |
Use Scenario: Storing certified diagnostic firmware and calibration data in FDA-regulated imaging equipment where data integrity is auditable and immutable. IC Role / Device Role / Timing Role: Secure boot memory with locked-down sectors containing signed bootloader and cryptographic keys. Use Value: 128-bit protection register stores unique device identifiers and tamper-evident signatures; sector lockdown prevents unauthorized modification of safety-critical code. | Use Scenario: Embedded vision module storing camera ISP firmware and sensor calibration profiles subject to automotive AEC-Q100 Grade 2 requirements. IC Role / Device Role / Timing Role: In-system programmable Flash for over-the-air (OTA) updates; operates within 1.65–1.95 V supply range compatible with automotive PMIC outputs. Use Value: Dual 8 KB and 64 KB sector sizes enable granular update zones - small sectors for calibration data, large sectors for full firmware images - minimizing OTA bandwidth use. |
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, 1.7–2.0 V, 80 ns, 48-pin TSOP; lacks CFI, no VPP pin, no suspend/resume | No sector lockdown or protection register; limited to basic firmware storage without security features | Select when cost sensitivity outweighs need for secure boot or real-time suspend capability |
| MX29LV320ETTI-70G | 32 Mbit, 2.7–3.6 V, 70 ns, 48-pin TSOP; supports CFI and sector protection, but not suspend/resume | Requires 3.3 V supply; incompatible with 1.8 V systems; no VPP-based accelerated programming | Choose only if existing 3.3 V design infrastructure exists and 1.8 V operation is not required |
Compared with SST39VF3201C-80-4I-EKE and MX29LV320ETTI-70G, AT49SV322DT-80TU uniquely delivers 1.8 V operation with suspend/resume, VPP-accelerated programming, and 128-bit protection - making it the sole option for secure, low-voltage, real-time updatable embedded boot memory.
Availability
AT49SV322DT-80TU is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, medical imaging BIOS, and automotive ADAS camera modules requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for AT49SV322DT-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 acquired Atmel in 2016 and maintains full support for legacy Atmel Flash products including the AT49SV322D(T) family.
The AT49SV322D(T) product line was designed specifically for reliable, secure, in-system programmable boot memory in resource-constrained 1.8 V embedded systems - emphasizing data integrity, sector-level security, and real-time update flexibility.
FAQ
What is the maximum operating temperature range for the AT49SV322DT-80TU?
The AT49SV322DT-80TU is rated for operation from –40°C to +85°C (industrial grade). Absolute maximum bias temperature is –55°C to +125°C, but functional specification and endurance guarantees apply only within the industrial range. This makes AT49SV322DT-80TU suitable for enclosed industrial enclosures and telecom equipment without active cooling.
Does the AT49SV322DT-80TU support both top-boot and bottom-boot configurations?
Yes, the AT49SV322DT-80TU supports configurable top- or bottom-boot block organization. The selection is determined by the logic state of address pin A20 at power-up: low = bottom-boot (SA0–SA7 first), high = top-boot (SA63–SA70 first). This flexibility allows alignment with processor boot vector requirements without PCB redesign.
How does the VPP pin function during normal operation of the AT49SV322DT-80TU?
The VPP pin on the AT49SV322DT-80TU serves dual roles: it enables write/erase when held ≥1.65 V, and inhibits all programming if <0.4 V. During standard read operation, VPP may be tied to VCC or left floating only if externally clamped - but Microchip recommends connecting VPP to VCC (1.8 V) for guaranteed compatibility. At 10.0 V, VPP accelerates dual-word programming.
Can the AT49SV322DT-80TU be used in a 3.3 V system?
No, the AT49SV322DT-80TU is a 1.8 V-only device with absolute maximum VCC of 2.0 V. Applying 3.3 V will cause permanent damage. Input pins (A0–A20, CE, OE, WE, RESET) tolerate up to 5.5 V, but this refers only to voltage-withstand capability - not functional operation. The AT49SV322DT-80TU must be powered from a regulated 1.8 V supply.
What happens to sector lockdown status after a power cycle of the AT49SV322DT-80TU?
Sector lockdown status is volatile: all sectors are unlocked at power-up or RESET assertion. Lockdown must be re-applied via the six-cycle Sector Lockdown command after each power cycle. This design prevents accidental permanent lockout and allows recovery via hardware reset - a deliberate safety feature confirmed in the AT49SV322DT-80TU datasheet section 4.8.2.
AT49SV322DT-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
AT49SV322DT-80TU FAQ
1.How can I place an order for AT49SV322DT-80TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49SV322DT-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 AT49SV322DT-80TU reliable?
The price and inventory of AT49SV322DT-80TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49SV322DT-80TU is usually 5 days.
3.What payment methods are accepted for AT49SV322DT-80TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49SV322DT-80TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49SV322DT-80TU?
AT49SV322DT-80TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49SV322DT-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 AT49SV322DT-80TU?
For technical support, including AT49SV322DT-80TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49SV322DT-80TU requirements.
6.How does Aetrix verify that AT49SV322DT-80TU is sourced from the original manufacturer or authorized distributors?
All AT49SV322DT-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 AT49SV322DT-80TU meets industry standards.
7.What is the process for return or replacement of AT49SV322DT-80TU?
All AT49SV322DT-80TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49SV322DT-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 AT49SV322DT-80TU part is unused and in its original packaging.
Return procedure for AT49SV322DT-80TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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