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Microchip Technology AT49BV4096A-90TI
- Part No.:
- AT49BV4096A-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV4096A-90TI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,217
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Product details
Overview
AT49BV4096A-90TI from Atmel is a 4-megabit (512K × 8 / 256K × 16) single-supply Flash memory IC operating at 2.7V–3.6V, featuring 70 ns read access time, sector-erase architecture with boot-block protection, and byte/word programming in 30 µs. It serves as nonvolatile program storage in embedded microcontroller systems requiring in-system reprogrammability without high-voltage programming.
For engineers reviewing the AT49BV4096A-90TI datasheet, AT49BV4096A-90TI pinout, AT49BV4096A-90TI application, or AT49BV4096A-90TI equivalent, key selection considerations include its bottom-boot sector layout, hardware data protection via VCC sense and noise filtering, 10,000 write cycles endurance, and compatibility with standard EPROM-like CE/OE/WE control timing.
Technical Context
This parallel-interface Flash memory implements a four-sector architecture: one 8K-word boot block (00000H–01FFFH), two 4K-word parameter blocks, and one 240K-word main array. Erase and program operations are fully internalized-no external voltage pumps or timing clocks required-and controlled via six-byte command sequences written to specific address/data latches.
It supports dual data-width modes via the BYTE pin: word mode (I/O0–I/O15 active, A-1 unused) and byte mode (I/O0–I/O7 active, I/O15 repurposed as LSB address A-1). Boot block lockout is software-enabled and overrideable only by applying 12V to RESET during erase/program, ensuring secure firmware storage while permitting field updates to other sectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8 or 256K × 16), enabling compact firmware storage for 8-/16-bit bus microcontrollers |
| Read Access Time | 90 ns max - defines minimum instruction fetch latency in CPU clock-critical boot code paths |
| Supply Voltage | 2.7V–3.6V - compatible with battery-backed or low-voltage industrial power rails without level-shifting |
| Active Current | 25 mA typical - determines thermal budget and regulator sizing in always-on embedded hosts |
| Standby Current | 50 µA CMOS - enables ultra-low-power sleep states in portable or energy-harvested systems |
| Erase Time | 10 s max per sector - constrains firmware update duration and system downtime during field upgrades |
| Programming Time | 30 µs per byte/word - sets minimum write granularity and interrupt latency tolerance during runtime writes |
| Endurance | 10,000 program/erase cycles - specifies maximum field-upgrade count before wear-out in parameter-block usage |
Pinout & Package
AT49BV4096A-90TI is packaged in a 48-lead TSOP (Type I, 12 × 20 mm, JEDEC MO-142 DD), pin-compatible with industry-standard 48-pin Flash sockets. Pin functions are validated per Atmel Rev. 1618H datasheet Figure 2 (TSOP top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 512K-byte addressing; A-1 derived from I/O15 in byte mode |
| CE | Chip Enable | Active-low chip select; must be stable before address setup to avoid spurious reads/writes |
| OE | Output Enable | Active-low output gate; used with CE for bus contention control during read cycles |
| WE | Write Enable | Active-low write strobe; latches command/data on rising edge in conjunction with CE |
| RESET | Hardware Reset | Forces high-Z outputs; 12V input overrides boot lockout - requires isolated voltage path |
| BYTE | Data Width Select | Logic '0' = byte mode (I/O0–I/O7); logic '1' or open = word mode (I/O0–I/O15) |
| I/O0–I/O15 | Bidirectional Data Bus | In word mode: full 16-bit data path; in byte mode: I/O8–I/O14 tri-stated, I/O15 = A-1 |
| VPP | Programming Voltage | No-connect or tied to VCC/GND/5V/12V - functionally inert; no effect on operation |
| NC | No Connect | Unbonded pins - must remain floating; no routing or termination required |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector architecture | Fixed 8K-word block (00000H–01FFFH) ensures bootloader integrity and simplifies reset vector mapping |
| Software-programmable boot lockout | Prevents accidental overwrite of secure boot code unless 12V RESET override is applied |
| Data polling & toggle bit status | I/O7 complement and I/O6 toggling provide real-time, bus-compatible erase/program completion detection |
| Hardware data protection | VCC sense, 10 ms power-on delay, OE/CE/WE inhibit, and 15 ns noise filtering prevent unintended writes |
| Single 2.7–3.6V supply operation | Eliminates need for charge pumps or auxiliary voltage rails - reduces BOM count and PCB area |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
|
Use Scenario: Storing firmware and configuration parameters in programmable logic controllers deployed in factory automation environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile program memory holding boot code, application firmware, and calibration tables; accessed via 16-bit parallel bus during cold start and runtime updates. Use Value: 8K-word boot block lockout prevents corruption of safety-critical startup routines during field firmware patches; 50 µA standby current extends uptime in battery-buffered backup scenarios. |
Use Scenario: Hosting certified bootloader and diagnostic firmware in Class II medical instruments requiring traceable, tamper-resistant code storage. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced write protection; stores signed firmware images verified prior to execution by host MCU. Use Value: 12V RESET override enables authorized reprogramming of locked boot sectors during service events; 10,000-cycle endurance supports lifetime calibration updates. |
| Telecom Base Station Parameter Memory | Automotive Infotainment System Code Storage |
|
Use Scenario: Retaining RF calibration coefficients, channel maps, and regulatory compliance settings across power cycles in cellular base station radios. IC Role / Device Role / Timing Role: Parameter block memory (two 4K-word sections) storing volatile-tolerant operational data; erased/reprogrammed independently of main firmware. Use Value: Sector-erase isolation allows updating calibration data without disturbing main application code; fast 30 µs byte programming minimizes radio downtime during recalibration. |
Use Scenario: Storing navigation map data, UI assets, and feature-enable keys in automotive head units operating across -40°C to +85°C ambient conditions. IC Role / Device Role / Timing Role: Main memory array (240K-word block) holding updatable application binaries; accessed via 8-bit bus in byte mode for cost-optimized MCU interfaces. Use Value: Industrial-grade temperature rating (-40°C to +85°C) ensures reliable read access during engine-bay thermal transients; 2.7V min VCC supports operation during cranking voltage dips. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-90-4C-EKE | 4 Mbit, 90 ns, 3.0–3.6V; lacks boot-block lockout and RESET-based override; uses different command set | Requires external logic or firmware changes to emulate boot protection; not drop-in for lockout-dependent designs | Select when boot security is managed at MCU level and legacy SST command compatibility is preferred |
| MX29LV400CBTI-90G | 4 Mbit, 90 ns, 2.7–3.6V; top-boot configuration (boot block at highest addresses); identical sector sizes but inverted layout | Requires PCB-level address remapping or bootloader relocation to accommodate top-boot vector placement | Select when board layout reserves upper address space for boot code and MXIC's extended data polling is beneficial |
Compared with SST39VF400A-90-4C-EKE and MX29LV400CBTI-90G, the AT49BV4096A-90TI uniquely provides bottom-boot lockout with hardware-reset override, making it the only option where secure, field-upgradable bootloader storage is mandatory without MCU-side intervention.
Availability
AT49BV4096A-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader, telecom parameter memory, and automotive infotainment system code storage requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV4096A-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
Atmel Corporation (now part of Microchip Technology) is a semiconductor manufacturer specializing in microcontrollers, nonvolatile memory, and secure authentication devices for industrial, automotive, and consumer applications.
The AT49BV/LV4096A product line delivers single-supply, sector-erasable Flash memory optimized for embedded systems requiring robust in-system reprogrammability, hardware write protection, and extended temperature reliability - particularly where bootloader integrity is critical.
FAQ
What is the operating voltage range for the AT49BV4096A-90TI?
The AT49BV4096A-90TI operates from 2.7V to 3.6V DC. This single-supply range eliminates the need for separate programming voltages and supports direct connection to 3.3V logic rails or battery-backed systems. Operation below 2.7V disables programming functions via internal VCC sense circuitry, and the device enters a safe, inhibited state.
How does the boot block lockout feature work on the AT49BV4096A-90TI?
The AT49BV4096A-90TI boot block lockout is enabled via a six-step command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once activated, the 8K-word boot block (00000H–01FFFH) becomes immune to erase/program commands using ≤5.5V inputs. The AT49BV4096A-90TI retains this protection until explicitly overridden with 12V on RESET.
Can the AT49BV4096A-90TI be used in both byte and word modes, and how is this selected?
Yes, the AT49BV4096A-90TI supports both configurations via the BYTE pin. When BYTE = logic '0', it operates in byte mode: I/O0–I/O7 are active, and I/O15 functions as address bit A-1. When BYTE = logic '1' or left open, it operates in word mode: I/O0–I/O15 form a full 16-bit bus. This flexibility allows the AT49BV4096A-90TI to interface seamlessly with either 8-bit or 16-bit microcontrollers without external glue logic.
What methods are available to detect completion of program or erase operations on the AT49BV4096A-90TI?
The AT49BV4096A-90TI provides two hardware-supported status detection methods: Data Polling (monitoring I/O7 for complemented data during programming or '0' during erase) and Toggle Bit (observing I/O6 toggling until completion). Both operate asynchronously over the data bus and require no additional pins or clocks - essential for deterministic timing in resource-constrained embedded systems using the AT49BV4096A-90TI.
Is the AT49BV4096A-90TI pin-compatible with other 48-pin TSOP Flash memories?
The AT49BV4096A-90TI uses a JEDEC MO-142 DD-compliant 48-lead TSOP package with standard pinout for parallel Flash devices (A0–A17, CE/OE/WE, I/O0–I/O15, RESET, BYTE, VCC, GND). While mechanical footprint matches many 48-pin TSOP Flash parts, electrical compatibility depends on command set, timing, and features - e.g., the AT49BV4096A-90TI's boot lockout and RESET override are not replicated in most alternatives, so functional substitution requires validation.
AT49BV4096A-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:
- 4Mbit
- Memory Organization:
- 512K x 8, 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 30µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV4096A-90TI FAQ
1.How can I place an order for AT49BV4096A-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV4096A-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 AT49BV4096A-90TI reliable?
The price and inventory of AT49BV4096A-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV4096A-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV4096A-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV4096A-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV4096A-90TI?
AT49BV4096A-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV4096A-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 AT49BV4096A-90TI?
For technical support, including AT49BV4096A-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV4096A-90TI requirements.
6.How does Aetrix verify that AT49BV4096A-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV4096A-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 AT49BV4096A-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV4096A-90TI?
All AT49BV4096A-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV4096A-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 AT49BV4096A-90TI part is unused and in its original packaging.
Return procedure for AT49BV4096A-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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