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Microchip Technology AT49SV802AT-90CI
- Part No.:
- AT49SV802AT-90CI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-VFBGA, CSPBGA
- Datasheet:
-
AT49SV802AT-90CI.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48CBGA
- Quantity:
- Payment:
- Shipping:
Inventory:1,550
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Product details
Overview
AT49SV802AT-90CI from Microchip Technology (formerly Atmel) is a 1.8V-only, 8-megabit (524,288 × 16-bit / 1,048,576 × 8-bit) parallel Flash memory IC with sector erase architecture, 90 ns access time, and single-voltage 1.65–1.95V operation. It supports byte/word programming in 12 µs and sector erase in 300 ms, and is used for firmware storage and boot code retention in embedded microcontroller systems.
For engineers reviewing the AT49SV802AT-90CI datasheet, AT49SV802AT-90CI pinout, AT49SV802AT-90CI application, or AT49SV802AT-90CI equivalent, key selection considerations include its TSOP-48/CBGA-48 packaging, CFI-compliant interface, sector lockdown capability, suspend/resume functionality for concurrent read/program operations, and 100,000 erase cycle endurance.
Technical Context
The AT49SV802AT-90CI implements a parallel x8/x16 configurable interface with BYTE pin control, CE/OE/WE dual-line enable logic to prevent bus contention, and an internal write state machine managing program/erase timing without external clocks. Its 23-sector architecture includes fifteen 64 KB (32K-word) sectors and eight 8 KB (4K-word) sectors - specifically arranged in top-boot configuration per the AT49SV802AT variant.
It integrates hardware data protection (VCC sense, 10 ms power-on delay), a 128-bit user-programmable protection register (with factory-block A and lockable block B), and three end-of-operation detection methods: READY/BUSY open-drain output, Data Polling on I/O7, and Toggle Bit on I/O6 - all configurable via a two-state status register.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 × 16-bit or 1,048,576 × 8-bit); enables compact firmware storage in resource-constrained MCU hosts. |
| Access Time | 90 ns; ensures compatibility with legacy 8051, ARM7, and similar microcontrollers operating at ≤11 MHz bus speeds. |
| Supply Voltage | 1.65 V to 1.95 V only; eliminates need for voltage translators when interfacing with 1.8V logic families. |
| Program Time | 12 µs per byte/word; reduces firmware update latency during field upgrades or manufacturing programming. |
| Erase Time | 300 ms per sector; balances speed and reliability for selective code region updates without full chip erase. |
| Erase Endurance | 100,000 cycles minimum; supports long-term field reprogramming in industrial controllers and medical devices. |
| Interface Standard | Common Flash Interface (CFI); allows runtime auto-detection of geometry, timing, and command sets by host bootloader software. |
Pinout & Package
AT49SV802AT-90CI is available in 48-lead TSOP (Type 1, 12 mm × 20 mm) and 48-ball CBGA (8 mm × 10 mm) packages. Both variants share identical pin functions and logic behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word (x16) or 1M-byte (x8) addressing; A-1 alias on I/O15 in byte mode. |
| I/O0–I/O14 | Data I/O (bidirectional) | Primary data path; I/O0–I/O7 active in byte mode, I/O0–I/O15 in word mode. |
| I/O15 / A-1 | Mode-dependent terminal | In word mode: data bit 15; in byte mode: LSB address input (A-1), enabling x8 addressing expansion. |
| BYTE | Configuration control | Logic high = x16 word mode; logic low = x8 byte mode - determines active I/O pins and address mapping. |
| CE, OE, WE | Chip/Output/Write Enable | Dual-line CE/OE control prevents bus contention; WE initiates command latching on falling edge. |
| RDY/BUSY | Open-drain status output | Active-low during program/erase; supports wired-OR connection across multiple Flash devices on shared bus. |
| RESET | Hardware initialization | Pulling low halts ongoing operation and forces high-impedance outputs; required to exit suspend or error states. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | Fifteen 64 KB + eight 8 KB sectors (AT49SV802AT top-boot layout); enables granular firmware partitioning and secure boot block protection. |
| Erase/Program Suspend | Interrupts active erase or program to allow concurrent read from non-suspended sectors - critical for real-time system responsiveness during updates. |
| Sector Lockdown | Per-sector write-protection activated via six-cycle command; preserves immutable boot code while permitting application code updates. |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable 64-bit block B; supports device authentication and IP protection in production firmware. |
| Hardware Data Protection | VCC sense (<1.65V inhibits programming), 10 ms power-on delay, and CE/OE/WE gating prevent accidental writes during brown-out or reset conditions. |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers with periodic field upgrades. IC Role / Device Role / Timing Role: Non-volatile parallel Flash memory providing x16 interface to ARM Cortex-M4 host MCU; 90 ns access satisfies deterministic scan-cycle timing. Use Value: Sector lockdown isolates bootloader from application updates; suspend/resume avoids PLC scan interruption during firmware patching. | Use Scenario: Securing certified boot firmware in FDA-cleared diagnostic equipment requiring traceable, tamper-resistant code storage. IC Role / Device Role / Timing Role: Primary boot memory mapped to MCU reset vector; CFI support enables automated verification of flash geometry and command set during pre-boot self-test. Use Value: 128-bit protection register stores cryptographic keys; 100,000 erase cycles exceed 10-year service life with quarterly updates. |
| Automotive ECU Calibration Data | Networking Equipment Configuration Storage |
Use Scenario: Holding engine calibration maps and emission control parameters in Tier-1 automotive ECUs subject to ASIL-B functional safety requirements. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to TriCore or RH850 MCU; 1.8V operation aligns with modern low-power domain supply rails. Use Value: Hardware data protection prevents corruption during battery transients; sector erase permits map updates without disturbing safety-critical boot code. | Use Scenario: Storing FPGA configuration bitstreams and switch ASIC initialization tables in enterprise routers and switches. IC Role / Device Role / Timing Role: x8-mode Flash memory connected to MIPS-based management CPU; RDY/BUSY pin enables polling-free interrupt-driven configuration loading. Use Value: Fast 12 µs byte programming accelerates field-replaceable module provisioning; CFI query simplifies multi-vendor flash replacement in supply chain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF800A-90-4C-EKE | Same density (8 Mbit), 90 ns access, 3.0–3.6V supply; no CFI support; lacks suspend/resume and sector lockdown. | Requires external voltage translation for 1.8V hosts; unsuitable for real-time suspend scenarios or secure boot partitioning. | Select only if system operates at 3.3V and does not require concurrent read/program or firmware security features. |
| MX29LV800CTTC-90G | 8 Mbit, 90 ns, 3.0V core (2.7–3.6V); supports CFI and sector protection but no suspend/resume; different command set. | Higher voltage incompatible with 1.8V logic; no hardware suspend capability limits use in time-critical update environments. | Consider only for legacy 3.3V designs where CFI and basic sector lock suffice, and suspend is not required. |
Compared with SST39VF800A-90-4C-EKE and MX29LV800CTTC-90G, AT49SV802AT-90CI uniquely delivers 1.8V-only operation, integrated suspend/resume, and programmable sector lockdown - making it the sole option for secure, real-time firmware updates in modern low-voltage embedded systems.
Availability
AT49SV802AT-90CI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics equipment, automotive ECUs, networking infrastructure, and embedded controller applications requiring stable component supply and long-term lifecycle support.
Supply support for AT49SV802AT-90CI 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 AT49SV series Flash memory portfolio, including documentation, validation, and long-term supply assurance.
The AT49SV802AT-90CI belongs to Microchip's parallel Flash memory product line, designed specifically for reliable, low-voltage firmware storage in cost-sensitive, safety-aware embedded systems where sector-level security and real-time update capability are mandatory.
FAQ
What is the correct power supply range for AT49SV802AT-90CI?
The AT49SV802AT-90CI operates exclusively within 1.65 V to 1.95 V. Operation outside this range - including at 3.3 V or 5 V - is not supported and may cause permanent damage. The device includes VCC sense circuitry that disables programming if voltage falls below 1.65 V, ensuring robustness during power transitions. This strict 1.8V-only specification eliminates need for level shifters when interfacing with 1.8V microcontrollers.
Does AT49SV802AT-90CI support both x8 and x16 data bus configurations?
Yes, AT49SV802AT-90CI supports configurable x8 or x16 operation via the BYTE pin. When BYTE = HIGH, I/O0–I/O15 are active for 16-bit transfers; when BYTE = LOW, only I/O0–I/O7 function as data lines and I/O15 serves as A-1 address input for extended 8-bit addressing. This dual-mode flexibility allows seamless integration with both 8-bit and 16-bit microcontroller buses without redesigning PCB layout.
How does sector lockdown work on AT49SV802AT-90CI?
Sector lockdown on AT49SV802AT-90CI is enabled per sector using a six-bus-cycle command. Once activated, the locked sector becomes read-only: erase and program operations are blocked until next power cycle or RESET assertion. Lockdown status is verified by reading address 00002H within the sector - I/O0 = HIGH indicates lockdown active. This feature is essential for preserving boot code integrity while allowing application updates elsewhere in the memory array.
What methods does AT49SV802AT-90CI provide to detect end-of-program or end-of-erase?
AT49SV802AT-90CI offers three independent detection methods: (1) RDY/BUSY pin (open-drain, active-low), (2) Data Polling on I/O7 (complement-to-data or high-assertion depending on config register), and (3) Toggle Bit on I/O6 (toggling stops upon completion). All methods are usable simultaneously and can be selected based on system timing constraints or interrupt/polling architecture - no single method is mandatory.
Is AT49SV802AT-90CI compatible with Common Flash Interface (CFI) readers?
Yes, AT49SV802AT-90CI fully supports CFI. Entering CFI Query mode requires writing 0x98 to address 0x55, after which standardized parameter tables (geometry, timings, command sets) are readable at defined offsets. This enables host software to auto-configure drivers and verify compatibility before issuing erase/program commands - a key advantage for field-upgradable systems requiring second-source flexibility.
AT49SV802AT-90CI 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)
AT49SV802AT-90CI FAQ
1.How can I place an order for AT49SV802AT-90CI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49SV802AT-90CI 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 AT49SV802AT-90CI reliable?
The price and inventory of AT49SV802AT-90CI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49SV802AT-90CI is usually 5 days.
3.What payment methods are accepted for AT49SV802AT-90CI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49SV802AT-90CI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49SV802AT-90CI?
AT49SV802AT-90CI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49SV802AT-90CI 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 AT49SV802AT-90CI?
For technical support, including AT49SV802AT-90CI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49SV802AT-90CI requirements.
6.How does Aetrix verify that AT49SV802AT-90CI is sourced from the original manufacturer or authorized distributors?
All AT49SV802AT-90CI 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 AT49SV802AT-90CI meets industry standards.
7.What is the process for return or replacement of AT49SV802AT-90CI?
All AT49SV802AT-90CI units undergo pre-shipment inspection (PSI). If there is an issue with AT49SV802AT-90CI, 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 AT49SV802AT-90CI part is unused and in its original packaging.
Return procedure for AT49SV802AT-90CI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49SV802AT-90CI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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