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Microchip Technology AT49SV802A-90CU
- Part No.:
- AT49SV802A-90CU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-VFBGA, CSPBGA
- Datasheet:
-
AT49SV802A-90CU.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49SV802A-90CU from Microchip Technology (formerly Atmel) is a 1.8V-only, 8-Mbit parallel Flash memory organized as 524,288 × 16-bit or 1,048,576 × 8-bit, featuring 90 ns access time, sector erase architecture (15 × 64KB + 8 × 8KB), and single-voltage 1.65–1.95V operation. It supports in-system programming for embedded boot code storage in industrial controllers and legacy microprocessor-based systems.
For engineers reviewing the AT49SV802A-90CU datasheet, AT49SV802A-90CU pinout, AT49SV802A-90CU application, or AT49SV802A-90CU equivalent, key selection considerations include its TSOP-48 package, sector lockdown capability, CFI compliance, suspend/resume functionality, and 100,000 erase cycle endurance - critical for firmware update resilience in field-deployed equipment.
Technical Context
The AT49SV802A-90CU implements a command-register-based parallel Flash architecture with dual-mode (x8/x16) data interface controlled by the BYTE pin. Its internal write state machine handles embedded program/erase algorithms without external timing control, using standard microprocessor bus cycles for command entry.
It integrates hardware data protection (VCC sense, 10 ms power-on delay), three status detection methods (RDY/BUSY open-drain output, Data Polling on I/O7, Toggle Bit on I/O6), and a programmable configuration register that determines post-operation mode recovery behavior - either automatic return to read mode or requiring explicit Product ID Exit command.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 × 16 or 1,048,576 × 8), enabling compact boot code storage for 8/16-bit microcontrollers |
| Access Time | 90 ns max - meets timing requirements for 11 MHz bus interfaces without wait states |
| Supply Voltage | 1.65 V to 1.95 V only - eliminates need for dual-supply design; incompatible with 3.3 V or 5 V systems |
| Program Time | 12 µs per byte/word - enables fast field firmware patching with minimal system interruption |
| Erase Time | 300 ms per sector - balances speed and reliability for partial updates in safety-critical firmware |
| Erase Endurance | ≥100,000 cycles per sector - supports long-term field reprogramming in industrial PLCs and medical devices |
| CFI Support | Yes - allows runtime auto-detection of geometry, timing, and command set for OS-level flash drivers |
Pinout & Package
AT49SV802A-90CU is packaged in a 48-lead Thin Small Outline Package (TSOP Type I, 12 × 20 mm, 0.5 mm pitch), pin-compatible with industry-standard x16/x8 parallel Flash footprints. Pin functions are electrically identical between TSOP and CBGA variants; this part uses TSOP-48.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 8 Mbit addressing; A-1 function on I/O15 in byte mode |
| I/O0–I/O15 / I/O15(A-1) | Data I/O / LSB Address | x16 mode: bidirectional data bus; x8 mode: I/O0–I/O7 active, I/O15 repurposed as A-1 input |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; CE+OE low + WE high = read mode |
| BYTE | Bus Width Select | Logic high = x16 word mode; logic low = x8 byte mode - configures data path at power-up |
| RDY/BUSY | Open-Drain Status Output | Active-low during program/erase; supports wired-OR of multiple devices on shared status line |
| RESET | Hardware Initialization | Pulling low halts ongoing operation and forces high-impedance outputs - used for safe reset recovery |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 23 independently erasable sectors (15 × 64KB + 8 × 8KB) enables granular firmware partitioning and secure boot block isolation |
| Suspend/Resume Capability | Allows interrupting sector erase or program to read/write other sectors - essential for real-time systems requiring concurrent access |
| Sector Lockdown | Per-sector write-protection via software command prevents accidental overwrite of bootloader or calibration data |
| 128-bit Protection Register | Factory-programmed Block A + user-programmable/lockable Block B provides hardware-enforced security for device identity or keys |
| Common Flash Interface (CFI) | Standardized query table at known address enables OS/driver auto-configuration without hard-coded device assumptions |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System Boot Memory |
|---|---|
|
Use Scenario: Storing boot loader and application firmware in programmable logic controllers operating in harsh factory environments with frequent power cycling. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing x16 interface to 16-bit microcontroller bus; 90 ns access ensures deterministic boot timing. Use Value: Sector lockdown protects boot code from corruption during field firmware updates; 100,000 erase cycles support >10 years of maintenance cycles. |
Use Scenario: Replacing obsolete EPROMs in aging medical diagnostic equipment where board space and pin compatibility constrain redesign options. IC Role / Device Role / Timing Role: Drop-in parallel Flash replacement with identical TSOP-48 footprint and CE/OE/WE control signaling. Use Value: Single 1.8 V supply eliminates level-shifter components; CFI support simplifies driver porting from legacy EPROM-based BSPs. |
| Secure Boot Code Repository | Field-Upgradeable Instrument Calibration Storage |
|
Use Scenario: Holding immutable boot code and cryptographic keys in test and measurement instruments requiring FIPS-aligned secure startup. IC Role / Device Role / Timing Role: Secure nonvolatile memory with 128-bit protection register (factory Block A + locked user Block B) and hardware lockdown. Use Value: Prevents unauthorized modification of boot sequence; sector lockdown ensures bootloader integrity even if application sectors are rewritten. |
Use Scenario: Storing sensor calibration coefficients in portable environmental monitors updated via USB-connected service tools. IC Role / Device Role / Timing Role: In-system programmable Flash accessed via microcontroller's parallel bus during maintenance mode. Use Value: Suspend/resume allows reading live sensor data while updating calibration tables in background sectors - no system downtime required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF800A-90-4C-EKE | 90 ns access, 8 Mbit, 3.3 V supply (not 1.8 V); no CFI; lacks sector suspend/resume | Requires voltage translation for 1.8 V systems; unsuitable for real-time suspend use cases | Select only if existing 3.3 V infrastructure prohibits 1.8 V adoption and suspend features are unused |
| MX29LV800CTTI-90G | 90 ns access, 8 Mbit, 3.0–3.6 V supply; includes CFI and sector protection but no suspend/resume | Not compatible with 1.8 V logic; no mechanism to pause erase/program for concurrent reads | Consider only for cost-sensitive 3.3 V designs where suspend functionality is unnecessary |
Compared with SST39VF800A-90-4C-EKE and MX29LV800CTTI-90G, the AT49SV802A-90CU uniquely delivers 1.8 V operation with full suspend/resume and CFI - making it the only viable option for low-power, real-time updatable embedded systems requiring guaranteed boot integrity.
Availability
AT49SV802A-90CU is available at Aetrix Electronics and suitable for industrial automation, legacy system repair, and secure boot applications requiring stable component supply across extended product lifecycles.
Supply support for AT49SV802A-90CU 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 AT49SV802A series.
The AT49SV802A-90CU belongs to Atmel's 1.8 V parallel Flash family, designed specifically for drop-in replacement of EPROMs and earlier Flash devices in space-constrained, low-voltage embedded systems with strict boot reliability requirements.
FAQ
What is the operating voltage range for the AT49SV802A-90CU?
The AT49SV802A-90CU operates exclusively within 1.65 V to 1.95 V. It is not 3.3 V tolerant - applying higher voltages risks permanent damage. All control inputs (CE, OE, WE) accept 0–5.5 V logic levels, but I/O pins must remain within 0 to VCC + 0.6 V. This strict 1.8 V core requirement ensures low-power operation while maintaining compatibility with modern low-voltage microcontrollers. The AT49SV802A-90CU includes VCC sense circuitry that inhibits programming if supply falls below 1.65 V.
Does the AT49SV802A-90CU support both x8 and x16 data bus configurations?
Yes, the AT49SV802A-90CU supports configurable x8 or x16 operation via the BYTE pin. When BYTE = high, I/O0–I/O15 function as a 16-bit data bus; when BYTE = low, only I/O0–I/O7 are active as an 8-bit bus and I/O15 serves as A-1 (LSB address). Address mapping differs between modes: in x16 mode, 524,288 words × 16 bits are addressed using A0–A18; in x8 mode, 1,048,576 bytes × 8 bits use A-1–A18. The AT49SV802A-90CU retains full functionality in both configurations, including sector erase and lockdown.
How does sector lockdown work on the AT49SV802A-90CU?
Sector lockdown on the AT49SV802A-90CU is enabled per sector using a six-bus-cycle command. Once activated, a locked sector becomes read-only - its contents cannot be erased or programmed 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. The AT49SV802A-90CU supports independent lockdown of any of its 23 sectors, allowing secure separation of bootloader (e.g., SA0–SA7) from application code. This feature is non-volatile and persists across power cycles.
What status detection methods does the AT49SV802A-90CU provide for program/erase completion?
The AT49SV802A-90CU offers three concurrent status detection methods: RDY/BUSY (open-drain active-low signal), Data Polling (I/O7 complement toggles then stabilizes), and Toggle Bit (I/O6 toggles during operation, stops when complete). These can be used individually or in combination - for example, RDY/BUSY for hardware polling and Data Polling for software verification. The AT49SV802A-90CU's configuration register determines whether the device auto-returns to read mode after success (00) or requires Product ID Exit command (01). All methods are validated in the datasheet's algorithm figures.
Is the AT49SV802A-90CU pin-compatible with other 48-lead parallel Flash devices?
The AT49SV802A-90CU uses a standard TSOP-48 footprint matching JEDEC MO-141AC, with identical pinout to many 8 Mbit parallel Flash memories - including pin assignments for A0–A18, I/O0–I/O15, CE/OE/WE, BYTE, RESET, and RDY/BUSY. However, electrical and functional compatibility requires verification: unlike some alternatives, the AT49SV802A-90CU mandates 1.8 V supply and implements unique command sequences (e.g., six-byte chip erase). While physical layout may allow socket replacement, system-level validation of timing, voltage, and command set is required before substitution. The AT49SV802A-90CU is not a generic drop-in for 3.3 V Flash parts.
AT49SV802A-90CU 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:
- 8Mbit
- Memory Organization:
- 1M x 8, 512K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 70ns
- Access Time:
- 90 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 (6x8)
AT49SV802A-90CU FAQ
1.How can I place an order for AT49SV802A-90CU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49SV802A-90CU 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 AT49SV802A-90CU reliable?
The price and inventory of AT49SV802A-90CU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49SV802A-90CU is usually 5 days.
3.What payment methods are accepted for AT49SV802A-90CU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49SV802A-90CU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49SV802A-90CU?
AT49SV802A-90CU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49SV802A-90CU 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 AT49SV802A-90CU?
For technical support, including AT49SV802A-90CU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49SV802A-90CU requirements.
6.How does Aetrix verify that AT49SV802A-90CU is sourced from the original manufacturer or authorized distributors?
All AT49SV802A-90CU 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 AT49SV802A-90CU meets industry standards.
7.What is the process for return or replacement of AT49SV802A-90CU?
All AT49SV802A-90CU units undergo pre-shipment inspection (PSI). If there is an issue with AT49SV802A-90CU, 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 AT49SV802A-90CU part is unused and in its original packaging.
Return procedure for AT49SV802A-90CU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49SV802A-90CU Tags
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