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Microchip Technology AT49BV001NT-90TC
- Part No.:
- AT49BV001NT-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV001NT-90TC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,295
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Product details
Overview
AT49BV001NT-90TC from Atmel is a 1 Mbit (128K × 8) single-supply 3V-only Flash memory IC with 70 ns read access time, sector-based architecture (16KB boot block + two 8KB parameter blocks + two main memory blocks), and hardware data protection. It supports in-system reprogramming for embedded firmware storage in industrial controllers and legacy microcontroller systems.
For engineers reviewing the AT49BV001NT-90TC datasheet, AT49BV001NT-90TC pinout, AT49BV001NT-90TC application, or AT49BV001NT-90TC equivalent, key selection considerations include its 2.7–3.6V VCC range, 10-second chip erase time, byte-programmable architecture, boot block lockout feature, and TSOP-32 package compatibility with space-constrained PCB layouts.
Technical Context
The AT49BV001NT-90TC 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 program control logic eliminates need for external high-voltage programming circuitry.
It features dual erase modes: full-chip erase (10 s max) and sector-selective erase targeting specific 8KB parameter blocks or 32KB/64KB main memory blocks. The boot block (16KB, address range 1C000H–1FFFFH) includes programmable lockout that permanently prevents reprogramming when enabled under ≤5.5V conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - supports firmware image storage for 8-bit/16-bit MCUs. |
| Read Access Time | 90 ns max - compatible with 11 MHz bus timing in legacy microcontroller systems. |
| VCC Supply Range | 2.7 V to 3.6 V - enables direct connection to 3.3V system rails without level-shifting. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small configuration or calibration data segments. |
| Erase Cycle Time | 10 seconds max (full chip) - deterministic timing simplifies host firmware timeout handling. |
| End-of-Program Detection | DATA polling (I/O7 complement) and TOGGLE bit (I/O6) - enables interrupt-driven programming without fixed delays. |
| Write Endurance | 10,000 program/erase cycles - sufficient for infrequent firmware upgrades over 10+ year product life. |
| Standby Current | 50 µA CMOS - critical for battery-backed or low-power industrial monitoring nodes. |
Pinout & Package
AT49BV001NT-90TC is housed in a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), pin-compatible with industry-standard 32-pin parallel Flash footprints. Pin 1 is NC (no connect); RESET is functional and supports 12V override for boot block reprogramming.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper memory bank. |
| I/O0–I/O7 | Data Inputs/Outputs | Bi-directional 8-bit data bus; supports byte-wide reads/writes without multiplexing. |
| CE | Chip Enable | Active-low chip select; enables device on shared bus; must be stable before address setup. |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during read cycles. |
| 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; 12V input enables boot block override. |
| VCC / GND | Power Supply | Single 2.7–3.6V supply; decoupling required within 10 mm of pins per JEDEC standards. |
| NC / DC | No Connect | Pin 1 (TSOP) is NC; no external connection required - floating or grounded per board layout best practice. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture | Independent erasability of 8KB parameter blocks enables safe field updates of calibration data without affecting firmware. |
| Boot Block Lockout | Hardware-enforced write protection for 16KB boot code region (1C000H–1FFFFH) prevents accidental corruption during main memory reprogramming. |
| Hardware Data Protection | VCC sense (<1.8V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line interlock (OE low/CE high/WE high blocks writes). |
| 12V RESET Override | Applying 12V ±0.5V to RESET pin temporarily disables boot block lockout, enabling recovery of corrupted boot code in deployed systems. |
| Software Product ID | Manufacturer code 1FH and device code 04H readable via command sequence - enables automatic algorithm selection in universal programmers. |
Applications
| Industrial PLC Firmware Storage | Legacy MCU Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing boot code and application firmware storage with deterministic 90 ns read latency. Use Value: Sector erase capability isolates parameter updates from firmware upgrades, reducing risk of system failure during field maintenance. | Use Scenario: Replacing EPROM in aging 8051- or Z80-based embedded systems where socketed memory is retained but higher endurance and lower voltage are required. IC Role / Device Role / Timing Role: Drop-in 3.3V-compatible Flash replacement for 27C010 EPROMs, maintaining identical pinout and read protocol. Use Value: Eliminates UV erasers and high-voltage programmers while delivering 10,000-cycle endurance versus EPROM's single-use limitation. |
| Medical Device Calibration Storage | Telecom Line Card Configuration |
Use Scenario: Holding calibrated sensor offsets and gain coefficients in portable diagnostic equipment requiring long-term data retention and infrequent field updates. IC Role / Device Role / Timing Role: Parameter block Flash memory storing 8KB calibration tables with independent erase capability. Use Value: Dedicated 8KB parameter blocks allow recalibration without erasing full firmware, meeting IEC 62304 traceability requirements. | Use Scenario: Storing FPGA configuration bitstreams and DSP initialization code on telecom line cards with hot-swap capability. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to FPGA configuration controller for fast power-up initialization. Use Value: 50 µA standby current minimizes power draw during card standby, critical for dense line card chassis thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001T-90TC | No boot block lockout override via RESET; boot block protection is permanent once enabled. | Lacks 12V RESET override - unsuitable for systems requiring field-recoverable boot code. | Select only if boot block content is truly immutable and 12V override is unnecessary. |
| SST39VF010-90-4C-NHE | 40 ns faster read (50 ns), 3.0–3.6V only, no 12V RESET pin; uses different command set. | Higher performance but lacks boot block lockout feature and hardware override mechanism. | Choose for speed-critical applications where boot protection is handled in software or external logic. |
Compared with AT49BV001T-90TC, the AT49BV001NT-90TC adds 12V RESET override for boot block recovery; compared with SST39VF010-90-4C-NHE, it trades raw speed for robust hardware-level boot integrity and field serviceability.
Availability
AT49BV001NT-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy MCU bootloader memory, and medical device calibration storage requiring stable component supply across extended product lifecycles.
Supply support for AT49BV001NT-90TC 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/LV series was designed for cost-sensitive, space-constrained embedded systems needing reliable in-system reprogrammable nonvolatile storage with industrial temperature support and hardware data protection.
FAQ
What is the function of the RESET pin on the AT49BV001NT-90TC?
The RESET pin on the AT49BV001NT-90TC is an active-low input that halts ongoing program or erase operations and places outputs in high-impedance state. Critically, applying 12V ±0.5V to this pin overrides the boot block programming lockout, enabling reprogramming of the protected 16KB boot sector (1C000H–1FFFFH) even after lockout activation - a unique recovery feature not present in AT49BV001T variants. The AT49BV001NT-90TC datasheet specifies this behavior in the Boot Block Programming Lockout Override section.
Does the AT49BV001NT-90TC support both chip erase and sector erase operations?
Yes, the AT49BV001NT-90TC supports both chip erase and sector erase. Chip erase clears all memory except the boot block when lockout is enabled (max 10 seconds), while sector erase targets individual 8KB parameter blocks (1A000H–1BFFFH, 18000H–19FFFH) or main memory blocks (10000H–17FFFH, 00000H–0FFFFH). The AT49BV001NT-90TC uses a six-bus-cycle command sequence with address-dependent sector selection, and erase timing is fully internal - no external clocks required.
What is the memory organization and address mapping of the AT49BV001NT-90TC?
The AT49BV001NT-90TC organizes its 1 Mbit (128K × 8) memory into five sectors: one 16KB boot block (1C000H–1FFFFH), two 8KB parameter blocks (1A000H–1BFFFH and 18000H–19FFFH), and two main memory blocks (10000H–17FFFH = 32KB, 00000H–0FFFFH = 64KB). This asymmetric layout differs from the base AT49BV001(N) variant (boot block at 00000H–03FFFH) and is explicitly defined for the "(N)T" suffix in the AT49BV001NT-90TC datasheet's memory map diagrams and command definitions.
How does hardware data protection work on the AT49BV001NT-90TC?
Hardware data protection on the AT49BV001NT-90TC operates through three mechanisms: (1) VCC sense circuitry inhibits programming if supply drops below ~1.8V; (2) Program inhibit logic blocks writes if OE is low, CE is high, or WE is high; (3) A noise filter rejects input pulses shorter than 15 ns on CE or WE pins. These features prevent spurious writes during power transients or EMI events - a critical reliability requirement confirmed in the AT49BV001NT-90TC DC Characteristics table and Hardware Data Protection section.
Is the AT49BV001NT-90TC pin-compatible with standard 32-pin parallel Flash packages?
Yes, the AT49BV001NT-90TC uses a 32-lead TSOP (Type 1, 8 × 20 mm) package with industry-standard pinout: A0–A16, I/O0–I/O7, CE, OE, WE, RESET, VCC, GND, and NC. Pin 1 is NC - matching the AT49BV001T-90TC and SST39VF010 footprints. The AT49BV001NT-90TC datasheet confirms identical pin configurations across PLCC, PDIP, TSOP, and VSOP variants, enabling drop-in replacement in existing 32-pin parallel Flash layouts without PCB revision.
AT49BV001NT-90TC 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:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49BV001NT-90TC FAQ
1.How can I place an order for AT49BV001NT-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001NT-90TC 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-90TC reliable?
The price and inventory of AT49BV001NT-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001NT-90TC is usually 5 days.
3.What payment methods are accepted for AT49BV001NT-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001NT-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001NT-90TC?
AT49BV001NT-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001NT-90TC 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-90TC?
For technical support, including AT49BV001NT-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001NT-90TC requirements.
6.How does Aetrix verify that AT49BV001NT-90TC is sourced from the original manufacturer or authorized distributors?
All AT49BV001NT-90TC 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-90TC meets industry standards.
7.What is the process for return or replacement of AT49BV001NT-90TC?
All AT49BV001NT-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001NT-90TC, 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-90TC part is unused and in its original packaging.
Return procedure for AT49BV001NT-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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