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Microchip Technology AT49BV1604AT-90TI
- Part No.:
- AT49BV1604AT-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV1604AT-90TI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV1604AT-90TI from Microchip Technology (formerly Atmel) is a 16-megabit (1M × 16 / 2M × 8) 3.3V-only Flash memory IC with sector erase architecture, 90 ns access time, and dual-plane concurrent read/program-erase capability. It supports top or bottom boot block configuration in 48-ball CBGA package and is used for firmware storage and code execution in embedded controllers and industrial microprocessor systems.
For engineers reviewing the AT49BV1604AT-90TI datasheet, AT49BV1604AT-90TI pinout, AT49BV1604AT-90TI application, or AT49BV1604AT-90TI equivalent, key selection criteria include sector lockdown support, VPP-accelerated programming, erase suspend/resume functionality, and compatibility with 2.65–3.3V single-supply in-system programming.
Technical Context
The AT49BV1604AT-90TI implements a dual-plane memory architecture: Plane A contains eight 4K-word and seven 32K-word sectors; Plane B contains twenty-four 32K-word sectors. This enables concurrent reads from one plane while programming or erasing the other - eliminating wait states during firmware updates.
It uses command-based operation with six-byte sequences for chip/sector erase and lockdown, and supports hardware data protection via VCC sense, noise filtering, and control-line inhibit logic. The RDY/BUSY pin, Data Polling (I/O7), and Toggle Bit (I/O6/I/O2) provide three independent end-of-operation detection methods.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16-bit or 2,097,152 × 8-bit) |
| Access Time | 90 ns - determines maximum sustained read throughput in microprocessor bus interfaces |
| Supply Voltage | 2.65V to 3.3V - enables direct integration with 3.3V logic without level-shifting |
| Sector Architecture | 39 sectors: thirty-one 64KB + eight 8KB - allows granular firmware partitioning and secure boot code isolation |
| Program Time | 20 µs per word - defines minimum write latency for runtime parameter storage |
| Erase Time | 300 ms per sector - impacts field-upgrade duration and system downtime |
| Standby Current | 10 µA - supports low-power retention in battery-backed or energy-constrained applications |
Pinout & Package
AT49BV1604AT-90TI is packaged in a 48-ball CBGA (Chip Scale Ball Grid Array) with 0.8 mm pitch, RoHS-compliant, and rated for industrial temperature range (−40°C to +85°C). Pinout conforms to CBGA Top View (Ball Down) layout as specified in Rev. 1411F–FLASH–03/02.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Inputs | 20-bit address bus supporting full 1M-word addressing; A-1 function on I/O15 in byte mode |
| I/O0–I/O15 | Data I/O (x16) / I/O0–I/O7 + A-1 (x8) | Configurable 16-bit or 8-bit data interface; I/O15 serves as LSB address input in byte mode |
| CE | Chip Enable | Active-low chip select; enables device on shared data bus and prevents contention |
| OE | Output Enable | Active-low output gate; controls data assertion timing independently of CE |
| WE | Write Enable | Active-low write strobe; latches address/data during command and program cycles |
| RDY/BUSY | Open-drain status indicator | Low during internal operations; supports wired-OR connection for multi-device monitoring |
| VPP | Accelerated Program/Erase Supply | Accepts 5.0V ±0.5V or 12.0V ±0.5V to reduce program/erase times; optional (can be unconnected) |
| RESET | Hardware Initialization | Active-low reset halts ongoing operations and forces high-impedance outputs |
| BYTE | Mode Selection | High = x16 word mode; Low = x8 byte mode - configures I/O width and A-1 routing |
| VCCQ | Output Power Supply | Separate 2.0V ±10% supply for I/O drivers when VCC is 2.65–3.0V; tied to VCC otherwise |
Key Features
| Feature | Design Value |
|---|---|
| Dual-plane concurrent operation | Enables real-time read access during background firmware update - no CPU stall required |
| Erase suspend/resume | Pauses active sector erase to service urgent read/program requests in same memory plane |
| Sector lockdown | Per-sector write protection prevents accidental overwrite of boot code or calibration data |
| 128-bit protection register | Factory-programmed 64-bit ID + user-programmable 64-bit lockable block for secure system authentication |
| Triple end-of-operation detection | RDY/BUSY pin, Data Polling (I/O7), and Toggle Bit (I/O6/I/O2) provide redundant, software-hardware flexible status reporting |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Boot Memory |
|---|---|
Use Scenario: Storing and executing boot firmware and safety-critical control algorithms in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Non-volatile code storage with fast random-access read (90 ns) and sector-protected update capability. Use Value: Enables field-upgradable firmware without requiring external programming hardware; sector lockdown ensures bootloader integrity across power cycles. | Use Scenario: Holding certified boot code and diagnostic routines in engine control units where functional safety (ISO 26262) mandates immutable startup sequences. IC Role / Device Role / Timing Role: Secure, electrically erasable boot memory with hardware-level sector lockdown and 128-bit protection register. Use Value: Prevents unauthorized modification of startup code; erase suspend allows diagnostics to run during partial firmware reflash. |
| Medical Device Configuration Storage | Telecom Base Station Parameter Memory |
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory compliance settings in portable diagnostic equipment with battery backup. IC Role / Device Role / Timing Role: Low-power (10 µA standby) non-volatile storage with byte/word programmability for infrequent parameter updates. Use Value: Extends battery life between charges; fast 20 µs word program time minimizes write latency during calibration sessions. | Use Scenario: Storing RF calibration tables, channel maps, and operational profiles in 4G/5G remote radio units exposed to wide temperature swings. IC Role / Device Role / Timing Role: Industrial-grade (−40°C to +85°C) Flash memory with dual-plane architecture for concurrent read/write in real-time signal processing paths. Use Value: Eliminates interrupt latency during over-the-air updates; VPP acceleration reduces flash wear during frequent parameter tuning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1601C-90-4C-EKE | Same density (16 Mbit), 90 ns access, but single-plane architecture; no erase suspend or dual-plane read-while-write | Lacks concurrent operation capability - requires CPU stalls during erase; no sector lockdown | Choose when cost sensitivity outweighs need for background firmware update or secure boot features |
| MX29LV160DBTI-90G | 16 Mbit, 90 ns, top-boot configuration; supports CFI interface but no VPP acceleration or 128-bit protection register | No hardware-accelerated programming; lacks dedicated RDY/BUSY pin (relies on polling only) | Prefer when CFI-compliant toolchain support is required and erase suspend is not needed |
Compared with SST39VF1601C-90-4C-EKE and MX29LV160DBTI-90G, the AT49BV1604AT-90TI uniquely delivers dual-plane concurrent operation, hardware sector lockdown, and VPP-accelerated programming - making it optimal for safety-critical, field-upgradable embedded systems where runtime responsiveness and code integrity are mandatory.
Availability
AT49BV1604AT-90TI is available at Aetrix Electronics and suitable for industrial PLCs, automotive ECUs, medical diagnostics, and telecom base stations requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for AT49BV1604AT-90TI 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 product support, documentation, and manufacturing continuity for the AT49BV/LV series.
The AT49BV1604AT-90TI belongs to Atmel's legacy parallel-interface Flash memory product line, designed specifically for embedded systems requiring reliable, in-system programmable non-volatile storage with robust security and real-time operational flexibility.
FAQ
What is the operating voltage range for the AT49BV1604AT-90TI?
The AT49BV1604AT-90TI operates within a single 2.65V to 3.3V supply range. It does not support 5V operation or mixed-voltage interfaces. VCCQ may be regulated separately to 2.0V ±10% for low-voltage I/O drive when VCC is 2.65–3.0V, but for standard 3.3V operation, VCCQ must be tied to VCC. This ensures compatibility with modern 3.3V microcontroller buses without level shifters.
Does the AT49BV1604AT-90TI support both byte and word modes?
Yes, the AT49BV1604AT-90TI supports configurable x8 and x16 operation via the BYTE pin. When BYTE = HIGH, it operates in 16-bit word mode with I/O0–I/O15 active. When BYTE = LOW, it operates in 8-bit byte mode: I/O0–I/O7 carry data, I/O8–I/O14 are tri-stated, and I/O15 functions as the A-1 address input. This dual-mode flexibility allows seamless integration with 8-bit or 16-bit host processors without redesigning the memory interface.
How does sector lockdown work on the AT49BV1604AT-90TI?
Sector lockdown on the AT49BV1604AT-90TI is enabled per sector using a six-bus-cycle command. Once activated, the locked sector becomes read-only - erasure and programming are permanently disabled until the next power-on or RESET cycle. Lockdown status can be verified by reading address 00002H within the sector: I/O0 = HIGH indicates lockdown active. This feature protects boot code and calibration data from accidental corruption during field firmware updates.
Can the AT49BV1604AT-90TI perform reads during an erase operation?
Yes - the AT49BV1604AT-90TI's dual-plane architecture allows concurrent reads from one memory plane while erasing or programming the other. For example, reads from Plane B continue uninterrupted during a sector erase in Plane A. Additionally, the Erase Suspend command lets the system pause an ongoing erase in the same plane to perform reads or writes elsewhere - further enhancing real-time responsiveness in time-critical embedded applications.
What packaging and temperature grade is the AT49BV1604AT-90TI?
The AT49BV1604AT-90TI is supplied in a 48-ball CBGA package (0.8 mm pitch) and is rated for industrial temperature operation from −40°C to +85°C. The "TI" suffix explicitly denotes this industrial-grade qualification. It is not available in TSOP packaging - the AT49BV1604A(T) variant uses TSOP, but the AT49BV1604AT-90TI part number corresponds exclusively to the CBGA version per Atmel documentation Rev. 1411F–FLASH–03/02.
AT49BV1604AT-90TI 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:
- 16Mbit
- Memory Organization:
- 2M x 8, 1M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.65V ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV1604AT-90TI FAQ
1.How can I place an order for AT49BV1604AT-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV1604AT-90TI 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 AT49BV1604AT-90TI reliable?
The price and inventory of AT49BV1604AT-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV1604AT-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV1604AT-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV1604AT-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV1604AT-90TI?
AT49BV1604AT-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV1604AT-90TI 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 AT49BV1604AT-90TI?
For technical support, including AT49BV1604AT-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV1604AT-90TI requirements.
6.How does Aetrix verify that AT49BV1604AT-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV1604AT-90TI 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 AT49BV1604AT-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV1604AT-90TI?
All AT49BV1604AT-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV1604AT-90TI, 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 AT49BV1604AT-90TI part is unused and in its original packaging.
Return procedure for AT49BV1604AT-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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