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Microchip Technology AT49SV322DT-80CU
- Part No.:
- AT49SV322DT-80CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-VFBGA, CSPBGA
- Datasheet:
-
AT49SV322DT-80CU.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,717
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Product details
Overview
AT49SV322DT-80CU 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/48-ball CBGA). It enables in-system reprogramming in embedded controllers and boot code storage applications requiring robust data retention and hardware write protection.
For engineers reviewing the AT49SV322DT-80CU datasheet, AT49SV322DT-80CU pinout, AT49SV322DT-80CU application, or AT49SV322DT-80CU equivalent, key selection considerations include single-supply 1.65–1.95 V operation, sector lockdown capability, suspend/resume for concurrent read/program, CFI compliance, and VPP-controlled accelerated programming at 10 V.
Technical Context
The AT49SV322DT-80CU implements a parallel interface with CE/OE/WE control logic and supports standard microprocessor timing. Its internal write state machine handles embedded program/erase cycles without external clocks, using command sequences written via address/data bus latching on WE/CE edges.
It features a 71-sector architecture (63 × 64 KB + 8 × 8 KB), programmable configuration register (00/01 mode), 128-bit factory/user protection register, and hardware data protection including VCC sense, power-on delay, and VPP voltage gating - all coordinated through dedicated status bits (I/O2–I/O7) and RDY/BUSY open-drain output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 words × 16 bits); supports 2 MB of code/data storage in embedded systems. |
| Supply Voltage | 1.65 V to 1.95 V only; eliminates need for dual-voltage rails and simplifies power design. |
| Access Time | 80 ns max; ensures compatibility with high-speed 16-bit microcontrollers and DSPs. |
| Erase Architecture | 71 independently lockable sectors (63 × 64 KB + 8 × 8 KB); enables granular firmware updates without full chip erase. |
| Program Time | 10 µs per word; reduces in-field update latency for critical boot code patches. |
| Erase Time | 100 ms per sector; balances speed with reliability for field-programmable applications. |
| End-of-Operation Detection | RDY/BUSY pin + Data Polling (I/O7) + Toggle Bit (I/O6); provides multiple synchronous/asynchronous status options. |
| Endurance | ≥100,000 erase cycles per sector; validated for long-life industrial firmware storage. |
Pinout & Package
AT49SV322DT-80CU is available in a 48-pin TSOP Type 1 (JEDEC MO-141) package and a 48-ball CBGA (ball-down) package. Both packages share identical pin functionality and signal mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A0–A20 must be stable before CE/WE edge. |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel data path; high-impedance when CE or OE is high to prevent bus contention. |
| CE | Chip Enable | Active-low device select; must be low with OE low and WE high for read access. |
| OE | Output Enable | Active-low output control; used with CE to gate data outputs and avoid bus conflicts. |
| WE | Write Enable | Active-low write strobe; latches command/data during programming/erase sequences. |
| RDY/BUSY | Open-Drain Status Output | Pulled low during internal program/erase; supports wired-OR connection across multiple devices. |
| VPP | Write Protection & Acceleration Input | At <0.4 V: inhibits program/erase; at ≥1.65 V: enables normal operation; at 10.0 V: enables Dual-word Program mode. |
| RESET | Hardware Initialization Input | Active-low; halts ongoing operations and forces device into read/standby mode on rising edge. |
| NC | No Connect | Two pins (TSOP pin 13 & CBGA ball G6) are unconnected; must be left floating or tied to ground per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Lockdown | Per-sector write-protection enabled via six-bus-cycle command; preserves secure boot code while allowing runtime updates to application sectors. |
| Erase/Program Suspend | Interrupts active erase or program to enable concurrent read from other sectors; supports real-time system responsiveness during firmware updates. |
| Common Flash Interface (CFI) | Standardized query table accessible at address 55h with 98h command; enables auto-configuration in OS/bootloader without hard-coded timing parameters. |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable 64-bit block B; supports secure device identification and cryptographic key storage. |
| Single-Pulse Word Program Mode | After six-word entry sequence, subsequent writes require only single WE pulse; reduces software overhead in high-volume programming environments. |
| Hardware Data Protection | VCC sense (disable if <1.65 V), 10 ms power-on delay, and VPP voltage gating prevent accidental writes during power ramp or brownout. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing certified boot firmware and safety-critical configuration data in DIN-rail mounted programmable logic controllers operating continuously in factory environments. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing deterministic 80 ns read access for fast processor boot and secure sector-locked storage of IEC 61508-compliant code. Use Value: Sector lockdown prevents unauthorized modification of safety firmware; 100,000-cycle endurance ensures >10-year field life under periodic update cycles. | Use Scenario: Holding FDA-cleared bootloader and calibration tables in portable diagnostic equipment requiring traceable, tamper-resistant memory with audit-ready protection registers. IC Role / Device Role / Timing Role: Secure 1.8 V Flash memory with 128-bit factory/user protection register and CFI support for automated firmware validation during pre-deployment testing. Use Value: Block B lockout prevents post-certification reprogramming; VPP-controlled acceleration enables rapid factory calibration writes without compromising security. |
| Avionics Data Logger Memory | Automotive ECU Calibration Storage |
Use Scenario: Recording flight parameter snapshots in DO-160 qualified airborne data acquisition units where radiation tolerance and thermal stability are mandatory. IC Role / Device Role / Timing Role: Radiation-tolerant parallel Flash with RDY/BUSY open-drain output for synchronized multi-device logging and suspend/resume for uninterrupted data capture during sector erases. Use Value: 10 µs program time minimizes logging gaps; -55°C to +125°C operating range meets extended avionics temperature requirements. | Use Scenario: Storing engine calibration maps and OBD-II diagnostic history in Tier-1 automotive ECUs subject to AEC-Q100 stress testing and ISO 26262 functional safety requirements. IC Role / Device Role / Timing Role: Automotive-grade Flash memory with hardware write protection (VPP gating), sector lockdown, and CFI for ASAM-compliant flash programming tools. Use Value: Dual 8K/64K sector architecture allows independent locking of calibration vs. diagnostic sectors; 1.65–1.95 V supply matches modern low-voltage MCU domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201C-80-4C-EKE | 32 Mbit, 1.7–2.0 V, 80 ns, 48-TSOP; lacks CFI, no VPP pin, no suspend/resume, 100K cycles. | Supports basic boot code storage but not real-time suspend during logging or secure protection register. | Choose when CFI, sector lockdown, or suspend/resume are unnecessary and cost is primary driver. |
| MX29LV320ETTI-80G | 32 Mbit, 2.7–3.6 V, 80 ns, 48-TSOP; requires higher VCC, no VPP, no 128-bit protection register, 100K cycles. | Designed for legacy 3.3 V systems; incompatible with 1.8 V supply rails and lacks hardware security features. | Choose only for drop-in replacement in existing 3.3 V designs where voltage scaling is not feasible. |
Compared with SST39VF3201C-80-4C-EKE and MX29LV320ETTI-80G, the AT49SV322DT-80CU uniquely delivers 1.8 V operation with VPP-gated security, CFI auto-configuration, and true suspend/resume - enabling safer, more flexible firmware management in modern low-power embedded systems.
Availability
AT49SV322DT-80CU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, avionics data logging, and automotive ECU calibration storage requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AT49SV322DT-80CU 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 Inc. is a global semiconductor company specializing in microcontrollers, analog devices, and nonvolatile memory solutions, with a focus on reliability, longevity, and embedded system integration.
The AT49SV322DT-80CU belongs to Microchip's legacy Atmel parallel Flash memory product line, designed specifically for secure, in-system programmable code storage in safety-critical and long-lifecycle embedded applications.
FAQ
What is the operating voltage range for the AT49SV322DT-80CU?
The AT49SV322DT-80CU operates exclusively within a 1.65 V to 1.95 V supply range. Operation outside this window disables program and erase functions via built-in VCC sense circuitry. This strict 1.8 V nominal range eliminates compatibility with 3.3 V or 5 V systems and mandates dedicated low-voltage regulation for reliable AT49SV322DT-80CU performance.
Does the AT49SV322DT-80CU support in-system programming without external high-voltage supplies?
Yes, the AT49SV322DT-80CU supports full in-system programming using only its 1.65–1.95 V VCC supply. The VPP pin is optional: at ≥1.65 V it enables standard programming, and at 10.0 V it accelerates Dual-word Program mode. No external HV generator is required, making AT49SV322DT-80CU suitable for field-upgradable embedded systems with minimal board-level complexity.
How does sector lockdown work on the AT49SV322DT-80CU?
Sector lockdown on the AT49SV322DT-80CU is activated per sector using a six-bus-cycle command. Once enabled, a locked sector becomes permanently read-only until the next power cycle or RESET assertion. Lockdown status is verified by reading address 00002H within the sector - I/O0 = high indicates lockdown active. This mechanism protects AT49SV322DT-80CU boot code from accidental overwrite during application firmware updates.
What status monitoring methods does the AT49SV322DT-80CU provide for program/erase completion?
The AT49SV322DT-80CU offers three concurrent status methods: (1) RDY/BUSY open-drain pin (active-low), (2) Data Polling on I/O7 (complement-to-data or high/low depending on config register), and (3) Toggle Bit on I/O6. All require coordination with I/O5 (erase/program status) and I/O3 (VPP status) per documented algorithms. These ensure robust AT49SV322DT-80CU operation in noise-prone industrial environments.
Is the AT49SV322DT-80CU compatible with Common Flash Interface (CFI) hosts?
Yes, the AT49SV322DT-80CU fully complies with the Common Flash Interface standard. Entering CFI Query mode requires writing 98h to address 55h, after which standardized timing, geometry, and command-set parameters are readable from defined addresses. This enables AT49SV322DT-80CU auto-detection and configuration by generic flash programmers and bootloader frameworks without vendor-specific drivers.
AT49SV322DT-80CU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-VFBGA, CSPBGA
- 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-CBGA (7x10)
AT49SV322DT-80CU FAQ
1.How can I place an order for AT49SV322DT-80CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49SV322DT-80CU 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-80CU reliable?
The price and inventory of AT49SV322DT-80CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49SV322DT-80CU is usually 5 days.
3.What payment methods are accepted for AT49SV322DT-80CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49SV322DT-80CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49SV322DT-80CU?
AT49SV322DT-80CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49SV322DT-80CU 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-80CU?
For technical support, including AT49SV322DT-80CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49SV322DT-80CU requirements.
6.How does Aetrix verify that AT49SV322DT-80CU is sourced from the original manufacturer or authorized distributors?
All AT49SV322DT-80CU 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-80CU meets industry standards.
7.What is the process for return or replacement of AT49SV322DT-80CU?
All AT49SV322DT-80CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49SV322DT-80CU, 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-80CU part is unused and in its original packaging.
Return procedure for AT49SV322DT-80CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49SV322DT-80CU Tags
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