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Microchip Technology AT49BV001AN-55TU
- Part No.:
- AT49BV001AN-55TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV001AN-55TU.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,494
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Product details
Overview
AT49BV001AN-55TU from Atmel is a 1 Mbit (128K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC with 55 ns read access time, 30 µs/byte programming, and sector-based erase architecture including a 16 KB boot block with programmable lockout. It operates across the industrial temperature range (−40°C to +85°C) and targets embedded firmware storage in microcontroller-based systems requiring field-upgradable code.
For engineers reviewing the AT49BV001AN-55TU datasheet, AT49BV001AN-55TU pinout, AT49BV001AN-55TU application, or AT49BV001AN-55TU equivalent, key selection criteria include its PLCC/TSOP-compatible 32-pin interface, boot-sector hardware protection, DATA polling and toggle-bit end-of-program detection, and green Pb/halide-free TSOP packaging per ordering code AT49BV001AN-55TU.
Technical Context
The AT49BV001AN-55TU implements a standard parallel Flash interface with CE/OE/WE control logic and supports EPROM-like read operation timing. Its internal command register executes software-controlled byte programming, sector erase (two 8 KB parameter blocks, two main memory blocks), and chip erase - all without external high-voltage programming signals.
It features dual-mode boot block protection: permanent lockout (enabled via 6-cycle command sequence) and optional 12 V RESET override - though the latter is explicitly disabled in the AT49BV001AN(T) variant per datasheet Section 4.3 and 4.6.2. Sector address mapping differs between AT49BV001A(N) and AT49BV001A(N)T variants, with AT49BV001AN-55TU following the AT49BV001A(N)T layout (boot block at 1C000H–1FFFFH).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Read Access Time | 55 ns - enables direct replacement of 55 ns EPROMs in legacy 8-bit bus systems |
| Supply Voltage | 2.7 V to 3.6 V - single battery-compatible rail, no 5 V required for read/write |
| Byte Programming Time | 30 µs typical - supports rapid field updates of small firmware patches |
| Erase Cycle Time | 3 seconds max for full chip or sector - deterministic timing eliminates need for external timers |
| End-of-Program Detection | DATA polling (I/O7 complement) and toggle-bit (I/O6) - allows host CPU to poll instead of fixed delays |
| Write Endurance | 10,000 program/erase cycles - validated for embedded applications with infrequent firmware updates |
| Standby Current | 50 µA CMOS - critical for low-power battery-backed systems during idle periods |
Pinout & Package
AT49BV001AN-55TU is supplied in a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), per JEDEC MO-142 BD. Pin 9 is designated NC (no connect) for this variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A11 is don't-care in command cycles |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel data path for read, program, and identification modes |
| CE | Chip Enable | Active-low chip select; must be low with OE low for valid read access |
| OE | Output Enable | Active-low output control; used with CE to prevent bus contention during reads |
| WE | Write Enable | Active-low write strobe; latches address/data during command and programming cycles |
| RESET | Reset Input | Halts ongoing operations and forces high-Z outputs; 12 V override for boot block unlock is not available on AT49BV001AN(T) |
| NC (Pin 9) | No Connect | Unbonded pin - must be left floating; not usable as I/O or control |
| VCC, GND | Power Supply | Single 2.7–3.6 V supply; 50 µA standby current enables low-quiescent designs |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | Independent erasure of two 8 KB parameter blocks and two main memory blocks (32 KB + 64 KB) - enables selective firmware updates without full chip erase |
| Boot Block Lockout | 16 KB protected region (1C000H–1FFFFH) with permanent lockout after command sequence - secures bootloader integrity against accidental overwrite |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibit (OE low/CE high/WE high blocks writes) - prevents spurious writes in noisy environments |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time, cycle-accurate program/erase completion signaling - eliminates need for worst-case timeout delays in host firmware |
| Green Packaging | Pb/halide-free TSOP (32T) per AT49BV001AN-55TU ordering code - meets RoHS Directive 2011/65/EU and JESD204B environmental compliance |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing field-upgradable ladder logic and configuration data in programmable logic controllers with limited maintenance windows. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with sector-erase granularity to update parameter blocks independently of main logic. Use Value: 3-second sector erase and 30 µs byte programming enable sub-minute firmware patch deployment during scheduled downtime. | Use Scenario: Hosting certified bootloader code in Class II medical instruments requiring immutable startup routines for regulatory traceability. IC Role / Device Role / Timing Role: Secure boot memory with hardware-enforced 16 KB lockout preventing runtime corruption of safety-critical initialization code. Use Value: Permanent boot block lockout ensures bootloader integrity across 10,000+ field updates, satisfying IEC 62304 clause 5.5.3 requirements. |
| Automotive Body Control Module | Point-of-Sale Terminal Configuration |
Use Scenario: Storing calibration tables and feature-enable flags in vehicle body control units subject to wide temperature swings. IC Role / Device Role / Timing Role: Industrial-grade (−40°C to +85°C) Flash memory interfaced directly to 8-bit MCU buses via CE/OE/WE protocol. Use Value: 55 ns read access and 50 µA standby current support real-time sensor response and low-battery sleep modes. | Use Scenario: Holding localized language packs, tax rate tables, and peripheral driver configurations in retail terminals deployed globally. IC Role / Device Role / Timing Role: Field-reprogrammable storage for localized assets, updated via USB-connected service tools using standard command sequences. Use Value: Software-based sector erase allows selective update of regional data without reprogramming entire firmware image. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MX29LV001CTTI-55G | 55 ns access, 1 Mbit, 3.0 V core, but uses different command set and lacks boot block lockout | Requires modified driver firmware; no hardware-protected boot sector | Select when existing design already uses Macronix command compatibility and boot protection is handled externally |
| SST39VF010-55-4C-NHE | 55 ns access, 1 Mbit, 3.3 V, includes byte-write and sector-erase but no dedicated boot block lockout | Relies on software-based write protection; no 12 V override capability | Prefer for cost-sensitive designs where bootloader security is enforced at application layer |
Compared with MX29LV001CTTI-55G and SST39VF010-55-4C-NHE, the AT49BV001AN-55TU uniquely delivers factory-configurable 16 KB boot block lockout with permanent hardware enforcement - eliminating reliance on software-only protection schemes in safety-critical embedded firmware.
Availability
AT49BV001AN-55TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader implementation, and automotive body control module applications requiring stable component supply and long-term lifecycle support.
Supply support for AT49BV001AN-55TU 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT49BV001A(N)(T) series belongs to Atmel's legacy parallel Flash memory product line, designed specifically for in-system reprogrammability in 8-bit embedded systems requiring EPROM drop-in replacement with enhanced data integrity features.
FAQ
What is the operating voltage range for the AT49BV001AN-55TU?
The AT49BV001AN-55TU operates from a single 2.7 V to 3.6 V supply. It does not require 5 V for any operation - read, write, or erase functions are fully supported within this range. This enables direct integration into battery-powered or low-voltage embedded systems without level-shifting circuitry. The device incorporates VCC sense circuitry that inhibits programming if VCC drops below ~1.8 V, ensuring data integrity during brown-out conditions.
Does the AT49BV001AN-55TU support hardware-protected boot code storage?
Yes, the AT49BV001AN-55TU includes a dedicated 16 KB boot block (address range 1C000H–1FFFFH) with programmable lockout. Once enabled via a six-cycle command sequence, the boot block becomes permanently write-protected under standard 2.7–3.6 V operation. Unlike some variants, the AT49BV001AN(T) does not support 12 V RESET override for boot block reprogramming - making the lockout irreversible in this specific package variant.
How is end-of-program detection implemented in the AT49BV001AN-55TU?
The AT49BV001AN-55TU provides two independent hardware methods: DATA polling (monitoring I/O7 for complemented data) and toggle-bit detection (observing I/O6 toggling state). Both operate asynchronously and can be polled at any time during programming. Once I/O7 returns true data or I/O6 stops toggling, the byte program cycle is complete - enabling precise timing control without fixed software delays. These features are confirmed in Sections 4.8 and 4.9 of the datasheet.
What package type and pin count does the AT49BV001AN-55TU use?
The AT49BV001AN-55TU uses a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), compliant with JEDEC MO-142 BD. It has 32 pins, with Pin 9 designated NC (no connect) per datasheet Section 2.2 and Table 27.2. This TSOP variant is distinct from the PLCC (32J) and VSOP (32V) options listed for other ordering codes in the same family.
What is the maximum erase time for a full chip erase on the AT49BV001AN-55TU?
The maximum erase time for a full chip erase on the AT49BV001AN-55TU is 5 seconds, with a typical value of 3 seconds. This timing is internally controlled by the device and requires no external clock or timing circuitry. If the boot block lockout feature is enabled, chip erase affects only the parameter blocks and main memory blocks - excluding the protected 16 KB boot sector - as specified in Section 4.4.1 of the datasheet.
AT49BV001AN-55TU 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:
- 55 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
AT49BV001AN-55TU FAQ
1.How can I place an order for AT49BV001AN-55TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001AN-55TU 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 AT49BV001AN-55TU reliable?
The price and inventory of AT49BV001AN-55TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001AN-55TU is usually 5 days.
3.What payment methods are accepted for AT49BV001AN-55TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001AN-55TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001AN-55TU?
AT49BV001AN-55TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001AN-55TU 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 AT49BV001AN-55TU?
For technical support, including AT49BV001AN-55TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001AN-55TU requirements.
6.How does Aetrix verify that AT49BV001AN-55TU is sourced from the original manufacturer or authorized distributors?
All AT49BV001AN-55TU 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 AT49BV001AN-55TU meets industry standards.
7.What is the process for return or replacement of AT49BV001AN-55TU?
All AT49BV001AN-55TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001AN-55TU, 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 AT49BV001AN-55TU part is unused and in its original packaging.
Return procedure for AT49BV001AN-55TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV001AN-55TU Tags
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