My Inquiry
My Account
Microchip Technology AT49BV001NT-90TI
- Part No.:
- AT49BV001NT-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV001NT-90TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,638
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV001NT-90TI from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply 3V-only Flash memory IC designed for in-system reprogrammability in embedded boot code storage. It features 70 ns read access time, 10-second chip erase cycle, byte-programming at 30 µs/byte typical, and hardware data protection with 10,000 write/erase cycles. It is used in microcontroller-based systems requiring secure, field-upgradable firmware storage.
For engineers reviewing the AT49BV001NT-90TI datasheet, AT49BV001NT-90TI pinout, AT49BV001NT-90TI application, or AT49BV001NT-90TI equivalent, key selection criteria include industrial temperature range (–40°C to +85°C), TSOP/VSOP/PLCC/DIP package compatibility, boot block programming lockout (16 KB, address 1C000H–1FFFFH), sector architecture, and 2.7–3.6 V supply operation.
Technical Context
The AT49BV001NT-90TI implements a command-register-based architecture with six-byte software command sequences for chip erase, sector erase, byte programming, and boot block lockout enable. Its sector layout includes one 16-Kbyte boot block, two 8-Kbyte parameter blocks, and two main memory blocks (32 KB and 64 KB), enabling selective erasure without affecting protected firmware.
It supports standard EPROM-like read timing with CE/OE/WE control, DATA polling (I/O7 complement) and Toggle Bit (I/O6) methods for program/erase completion detection, and hardware safeguards including VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulse rejection), and input-level-dependent boot block override (12 V on RESET).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports full firmware image storage for 8-bit microcontrollers. |
| Read Access Time | 90 ns max - ensures compatibility with 11 MHz bus timing in legacy embedded controllers. |
| Supply Voltage | 2.7 V to 3.6 V - enables direct interface with 3.3 V logic and battery-backed systems without level shifting. |
| Erase Cycle Time | 10 seconds typical for full chip erase - enables rapid field firmware updates during maintenance windows. |
| Programming Speed | 30 µs/byte typical - allows efficient incremental patching of configuration or calibration data. |
| Endurance | 10,000 write/erase cycles - supports long-term deployment in industrial equipment with periodic firmware upgrades. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade applications including motor drives and PLC modules. |
Pinout & Package
AT49BV001NT-90TI is available in 32-lead TSOP (8 × 20 mm), VSOP (8 × 14 mm), PLCC, and PDIP packages. Pin functions are identical across all packages per datasheet Figure 1–3; TSOP and VSOP use pin 9 as NC (not connected), while PLCC and PDIP use pin 1 as DC (don't connect). The device uses standard parallel address/data bus interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper/lower memory half. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel data path for read, program, and command loading; TTL-compatible I/O levels. |
| 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 shared-memory access. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V input enables boot block override. |
| VCC / GND | Power Supply | Single 2.7–3.6 V supply; CMOS standby current <50 µA enables low-power retention in sleep modes. |
| NC / DC | No Connect / Don't Connect | Unused pins (pin 9 in TSOP/VSOP; pin 1 in PLCC/PDIP); must be left floating or tied to ground per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16-Kbyte region (1C000H–1FFFFH) permanently protected after lockout enable; prevents accidental overwrite of bootloader code. |
| Sector-Erasable Architecture | Independent erasure of two 8-Kbyte parameter blocks and two main memory blocks (32 KB/64 KB) enables modular firmware updates. |
| Hardware Data Protection | VCC sense, noise filtering, and dual-line (CE/OE) write inhibit prevent spurious programming during power transients or EMI events. |
| 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. |
| 12 V RESET Override | Applying 12 V ±0.5 V to RESET pin during erase/program bypasses boot block lockout - enables emergency recovery without hardware redesign. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing certified bootloader and safety-critical initialization routines in programmable logic controllers deployed in factory automation. IC Role / Device Role / Timing Role: Nonvolatile boot code storage with hardware-protected 16-KB sector; accessed during cold start before main application loads. Use Value: Ensures bootloader integrity across 10,000+ field updates and survives industrial voltage transients due to VCC-sense programming inhibition. | Use Scenario: Holding FDA-approved boot firmware in portable diagnostic instruments requiring traceable, tamper-resistant code storage. IC Role / Device Role / Timing Role: Secure, field-upgradable boot memory with lockout-enforced separation between bootloader and application partitions. Use Value: Enables regulatory-compliant firmware patches while maintaining immutable bootloader via 12 V RESET override for authorized service recovery. |
| Automotive Body Control Module | Telecom Remote Node Configuration |
Use Scenario: Storing vehicle-specific calibration tables and CAN protocol stacks in body control units operating across –40°C to +85°C. IC Role / Device Role / Timing Role: Industrial-temp Flash memory interfaced directly to 8-bit MCU parallel bus; erased/programmed via in-system commands. Use Value: Supports over-the-air update readiness with 90 ns read speed matching MCU bus timing and 10-second erase enabling fast reconfiguration. | Use Scenario: Retaining network configuration parameters and firmware version metadata in remote base station management modules. IC Role / Device Role / Timing Role: Parameter block storage (two 8-KB sectors) for field-serviceable settings independent of main application code. Use Value: Allows zero-downtime parameter updates using sector-erase - no full chip erase required, preserving operational firmware integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 40 ns faster read (50 ns vs. 90 ns); 3.3 V only (3.0–3.6 V); same 1 Mbit density and TSOP32 package. | Lacks boot block lockout and 12 V RESET override; uses different command set (SST proprietary). | Preferred when higher read performance is critical and bootloader protection is handled externally. |
| MX29LV001CTTI-90G | Same 90 ns access, 2.7–3.6 V supply, and industrial temp rating; includes CFI-compliant command set and 16 KB boot sector. | Boot sector address differs (00000H–03FFFH); no 12 V RESET override; requires CFI-aware host driver. | Recommended for new designs needing CFI standardization and broader toolchain support, with trade-off in recovery flexibility. |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49BV001NT-90TI uniquely combines industrial temperature operation, hardware-enforced boot block protection with 12 V override, and Atmel's mature command-set ecosystem - making it optimal for legacy system maintenance where bootloader integrity and field recovery are non-negotiable.
Availability
AT49BV001NT-90TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive body control module applications requiring stable component supply and long-term lifecycle support.
Supply support for AT49BV001NT-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 support for legacy Atmel Flash products including the AT49BV series.
The AT49BV001NT-90TI belongs to Atmel's Battery-Voltage™ Flash memory product line, engineered for reliable in-system reprogramming in resource-constrained embedded systems with strict power and security requirements.
FAQ
What is the boot block address range for AT49BV001NT-90TI?
The boot block address range for AT49BV001NT-90TI is 1C000H to 1FFFFH (16 Kbytes), distinct from the base AT49BV001N variant (00000H–03FFFH). This offset accommodates top-of-memory bootloader placement and is confirmed in the "Notes" section of the datasheet (page 6, note 2) and sector map (page 4). The AT49BV001NT-90TI's boot block lockout feature operates exclusively within this range.
Does AT49BV001NT-90TI support 12 V RESET override for boot block programming?
Yes, AT49BV001NT-90TI supports 12 V ±0.5 V applied to the RESET pin during chip erase, sector erase, or byte programming to override the boot block programming lockout. This capability is explicitly documented in the "BOOT BLOCK PROGRAMMING LOCKOUT OVERRIDE" section (page 5) and is unavailable on N-suffix variants (e.g., AT49BV001N). The AT49BV001NT-90TI retains this feature as a critical field-recovery mechanism.
What package types are offered for AT49BV001NT-90TI?
AT49BV001NT-90TI is offered in four industry-standard 32-lead packages: TSOP (32T, 8 × 20 mm), VSOP (32V, 8 × 14 mm), PLCC (32J), and PDIP (32P6). All share identical pinout and functionality per datasheet pages 19–20 ordering tables. The "TI" suffix denotes industrial temperature grade (–40°C to +85°C) and is available across all package types.
How does hardware data protection work in AT49BV001NT-90TI?
AT49BV001NT-90TI implements three hardware data protection mechanisms: (1) VCC sense circuitry inhibits programming if supply drops below ~1.8 V; (2) simultaneous assertion of OE low, CE high, or WE high blocks write cycles; and (3) built-in noise filters reject input pulses shorter than 15 ns on CE/WE. These features are detailed in the "HARDWARE DATA PROTECTION" section (page 6) and ensure robustness against power glitches and EMI in industrial environments - a core design requirement for the AT49BV001NT-90TI.
What is the maximum erase time for AT49BV001NT-90TI?
The maximum erase time for AT49BV001NT-90TI is 10 seconds for full chip erase, as specified in the "Features" list (page 1) and "Program Cycle Characteristics" table (page 10). Sector erase times are not individually specified but are substantially faster; the device internally manages timing, eliminating external clock dependencies. This 10-second tEC value is guaranteed across the industrial temperature range and applies to both commercial and industrial-grade variants of the AT49BV001NT-90TI.
AT49BV001NT-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
AT49BV001NT-90TI FAQ
1.How can I place an order for AT49BV001NT-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001NT-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 AT49BV001NT-90TI reliable?
The price and inventory of AT49BV001NT-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001NT-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV001NT-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001NT-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001NT-90TI?
AT49BV001NT-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001NT-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 AT49BV001NT-90TI?
For technical support, including AT49BV001NT-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001NT-90TI requirements.
6.How does Aetrix verify that AT49BV001NT-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV001NT-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 AT49BV001NT-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV001NT-90TI?
All AT49BV001NT-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001NT-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 AT49BV001NT-90TI part is unused and in its original packaging.
Return procedure for AT49BV001NT-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV001NT-90TI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
