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Microchip Technology AT49BV001-90TI
- Part No.:
- AT49BV001-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV001-90TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,798
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Product details
Overview
AT49BV001-90TI from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It delivers 70 ns read access time, supports sector-based erase (boot, parameter, and main memory blocks), features hardware data protection, and enables byte-by-byte programming at 30 µs/byte typical - ideal for firmware updates in industrial controllers.
For engineers reviewing the AT49BV001-90TI datasheet, AT49BV001-90TI pinout, AT49BV001-90TI application, or AT49BV001-90TI equivalent, key selection criteria include its 90 ns access timing, industrial temperature range (−40°C to +85°C), boot block lockout capability, TSOP/VSOP/PLCC/DIP package compatibility, and 10,000 write/erase cycle endurance.
Technical Context
The AT49BV001-90TI implements a standard parallel Flash interface with CE/OE/WE control logic and supports command-based operations including chip erase, sector erase, byte programming, and software product identification. Its internal architecture includes a 16-Kbyte boot block (address 1C000H–1FFFFH), two 8-Kbyte parameter blocks, and two main memory blocks (32K and 64K bytes).
It uses Atmel's nonvolatile CMOS process and integrates DATA polling and toggle-bit status detection for end-of-program/erase verification. The RESET pin enables system-level reset and - when driven to 12 V - overrides boot block lockout during erase/program cycles, a feature absent in N-suffix variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8 bits) - supports full firmware image storage for 8-bit MCUs with external bus interfaces. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V systems and battery-backed operation down to 2.7 V. |
| Read Access Time | 90 ns max - ensures timing compliance with 10 MHz bus clocks in legacy microcontroller designs. |
| Erase Cycle Time | 10 seconds max (chip or sector) - enables field-upgradable firmware without requiring external high-voltage programmers. |
| Byte Programming Time | 30 µs typical - allows efficient patching of small code/data segments without full-block rewrites. |
| Endurance | 10,000 write/erase cycles - validated for long-term use in industrial logging and configuration storage applications. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded systems including PLCs and motor drives. |
Pinout & Package
AT49BV001-90TI is available in 32-lead TSOP (8 × 20 mm), VSOP (8 × 14 mm), PLCC, and PDIP packages. The TI suffix denotes industrial temperature grade and TSOP packaging per Atmel ordering conventions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper 64K region. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; latched on WE/CE edges for reliable byte programming and read. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during multi-device sharing. |
| WE | Write Enable | Active-low write strobe; initiates command sequences and byte programming on rising edge. |
| RESET | Reset Input | Active-low reset; when pulled to 12 V, overrides boot block lockout - critical for secure firmware recovery. |
| VCC / GND | Power Supply | Single 2.7–3.6 V supply; CMOS standby current <50 µA reduces power in sleep modes. |
| NC / DC | No Connect / Don't Connect | Unused pins (e.g., pin 9 in TSOP); must be left floating or tied to ground per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent 16-Kbyte boot block + dual 8-Kbyte parameter blocks + 32K/64K main memory - enables selective firmware update without erasing boot code. |
| Boot Block Lockout | Hardware-enforced write protection for boot sector (1C000H–1FFFFH); prevents accidental corruption of startup code in deployed systems. |
| 12 V RESET Override | Applying 12 V to RESET pin temporarily disables boot lockout - provides emergency reprogramming path for field-recoverable systems. |
| DATA Polling & Toggle Bit | Real-time status feedback via I/O7 complement or I/O6 toggling - eliminates need for fixed delay timers in host firmware. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits program), noise filtering (<15 ns pulse rejection), and control-line interlock (OE low/CE high/WE high blocks writes) - prevents spurious writes in noisy environments. |
Applications
| Industrial PLC Firmware Storage | Medical Device Configuration Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing boot code and application firmware with 90 ns read timing for real-time scan cycle execution. Use Value: Boot block lockout ensures bootloader integrity across 10,000+ field updates; industrial temp rating guarantees reliability at −40°C to +85°C. | Use Scenario: Retaining calibrated sensor offsets, user preferences, and safety-critical configuration parameters in portable diagnostic equipment. IC Role / Device Role / Timing Role: Low-power, tamper-resistant Flash storage interfaced to an 8-bit MCU via standard address/data bus. Use Value: 50 µA CMOS standby current extends battery life; hardware write protection prevents unauthorized parameter changes. |
| Automotive Body Control Module | Networking Equipment Boot Image |
Use Scenario: Hosting boot firmware and EEPROM-emulated parameter tables in automotive BCMs subject to extended temperature cycling. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory with RESET-driven 12 V override for secure over-the-air (OTA) recovery. Use Value: Sector erase allows incremental updates without disrupting vehicle operation; 10,000-cycle endurance meets automotive longevity requirements. | Use Scenario: Storing primary bootloader and fail-safe recovery image in enterprise switches and routers with hot-swap capability. IC Role / Device Role / Timing Role: Parallel Flash device mapped into CPU address space for fast boot initialization and firmware validation. Use Value: Dual main memory blocks enable A/B firmware partitioning; DATA polling simplifies host driver development for flash management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001-90JI | Same 1 Mbit density, 90 ns timing, and boot block architecture but packaged in PDIP (32P6) instead of TSOP; higher profile and through-hole mounting. | Preferred for prototyping, legacy board rework, or applications requiring socketed replaceability rather than surface-mount density. | Select AT49BV001-90JI only when mechanical constraints or assembly processes mandate DIP packaging. |
| SST39VF010-90-4C-NHE | 1 Mbit Flash with 90 ns access, 3.0–3.6 V supply, and similar sector architecture but lacks 12 V RESET override and uses different command sequences. | Compatible for basic code storage where boot block lockout override is not required; requires firmware adaptation for command set differences. | Choose SST39VF010-90-4C-NHE only if Atmel supply continuity is constrained and host software can accommodate alternate command protocols. |
Compared with AT49BV001-90JI and SST39VF010-90-4C-NHE, the AT49BV001-90TI offers optimized surface-mount integration (TSOP), guaranteed industrial temperature operation, and unique 12 V RESET-based boot recovery - making it the preferred choice for volume production of compact, field-upgradable embedded systems.
Availability
AT49BV001-90TI is available at Aetrix Electronics and suitable for industrial automation, medical diagnostics, and automotive body electronics requiring stable component supply, long lifecycle support, and guaranteed TSOP packaging.
Supply support for AT49BV001-90TI 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, Flash memory, and secure authentication devices.
The AT49BV series was designed for cost-sensitive, in-system reprogrammable code storage in 8-bit and 16-bit embedded systems - emphasizing robustness, low-voltage operation, and sector-level flexibility.
FAQ
What is the function of the RESET pin on the AT49BV001-90TI?
The RESET pin on the AT49BV001-90TI serves dual roles: as an active-low system reset signal that places outputs in high-impedance state, and - when driven to 12 V ± 0.5 V - as a boot block lockout override mechanism. This 12 V function is essential for recovering corrupted boot code in deployed systems and is explicitly supported in the AT49BV001-90TI datasheet. The AT49BV001-90TI must be powered within its 2.7–3.6 V range during this operation.
Does the AT49BV001-90TI support byte-level programming?
Yes, the AT49BV001-90TI supports true byte-by-byte programming with a typical time of 30 µs per byte. Programming is initiated via a four-bus-cycle command sequence (5555H/AAH → 2AAAH/55H → 5555H/A0H → address/data), and completion can be verified using DATA polling (I/O7 complement) or toggle-bit (I/O6 toggling) methods. This capability enables fine-grained firmware patching without full sector erasure.
What is the memory organization of the AT49BV001-90TI?
The AT49BV001-90TI organizes its 1 Mbit (131,072 × 8) memory into five sectors: one 16-Kbyte boot block (1C000H–1FFFFH), two 8-Kbyte parameter blocks (1A000H–1BFFFH and 18000H–19FFFH), and two main memory blocks (10000H–17FFFH = 32K bytes; 00000H–0FFFFH = 64K bytes). This layout supports secure boot code isolation and flexible firmware partitioning.
How does the boot block lockout feature work on the AT49BV001-90TI?
The AT49BV001-90TI boot block lockout is enabled via a six-cycle command sequence (5555H/AAH → 2AAAH/55H → 5555H/80H → 5555H/AAH → 2AAAH/55H → 5555H/40H). Once activated, writes/erases to the 16-Kbyte boot sector (1C000H–1FFFFH) are blocked at ≤5.5 V. The lockout status is readable at address 1C002H (I/O0 = high if locked). A 12 V pulse on RESET temporarily lifts the restriction.
Which packages are available for the AT49BV001-90TI?
The AT49BV001-90TI is specified for TSOP (32T), VSOP (32V), PLCC (32J), and PDIP (32P6) packages. The "TI" suffix specifically denotes the industrial temperature grade (−40°C to +85°C) and TSOP packaging per Atmel's ordering convention. Pin compatibility is maintained across all 32-lead variants, though mechanical dimensions and thermal characteristics differ.
AT49BV001-90TI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-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:
- 1Mbit
- Memory Organization:
- 128K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- 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:
- 32-TSOP
AT49BV001-90TI FAQ
1.How can I place an order for AT49BV001-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001-90TI 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 AT49BV001-90TI reliable?
The price and inventory of AT49BV001-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV001-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001-90TI?
AT49BV001-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001-90TI 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 AT49BV001-90TI?
For technical support, including AT49BV001-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001-90TI requirements.
6.How does Aetrix verify that AT49BV001-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV001-90TI 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 AT49BV001-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV001-90TI?
All AT49BV001-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001-90TI, 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 AT49BV001-90TI part is unused and in its original packaging.
Return procedure for AT49BV001-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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