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Microchip Technology AT49BV001AT-55TI
- Part No.:
- AT49BV001AT-55TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV001AT-55TI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,155
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Product details
Overview
AT49BV001AT-55TI 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, 3-second chip erase, and hardware data protection. It features sector architecture including a 16 KB boot block (address range 1C000H–1FFFFH), two 8 KB parameter blocks, and main memory blocks totaling 96 KB, used for firmware storage in embedded controllers and boot code retention.
For engineers reviewing the AT49BV001AT-55TI datasheet, AT49BV001AT-55TI pinout, AT49BV001AT-55TI application, or AT49BV001AT-55TI equivalent, key selection considerations include its 2.7–3.6 V operation, boot block lockout capability, DATA polling/Toggle Bit end-of-write detection, PLCC/TSOP/VSOP package options, and compatibility with standard microprocessor bus timing.
Technical Context
The AT49BV001AT-55TI implements a command-register-based programming architecture requiring six-byte software sequences for chip/sector erase and boot lockout enable. Its internal program control logic eliminates need for external high-voltage generators, supporting in-system reprogramming via standard 5 V-compatible command inputs.
It uses dual-line control (CE/OE) to prevent bus contention during read operations and supports hardware reset-driven boot block override at 12 V - a feature present on AT49BV001AT but absent on AN variants. The device's sector erase granularity enables selective updates of parameter blocks without disturbing boot or main memory contents.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Read Access Time | 55 ns - enables direct replacement of EPROMs in legacy 8-bit microcontroller systems |
| Supply Voltage | 2.7–3.6 V - operates from single battery or low-voltage regulated rail, eliminating level-shifting circuitry |
| Byte Programming Time | 30 µs typical - allows rapid field firmware patching without system downtime |
| Erase Cycle Time | 3 seconds max - supports full-chip or sector-level erasure with no external timing components |
| End-of-Write Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - enables real-time status monitoring without polling overhead |
| Boot Block Protection | 16 KB region (1C000H–1FFFFH) with lockout enabled via 6-byte command sequence - prevents accidental overwrite of critical startup code |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded applications including motor control and instrumentation |
Pinout & Package
AT49BV001AT-55TI is available in 32-pin PLCC (32J), TSOP (32T), and VSOP (32V) packages. Pin 1 is marked by corner cut or dot; RESET is functional (unlike AN variants) and supports 12 V override for boot block reprogramming.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A11–A16 are don't-care in some command cycles |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for read access |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention during reads |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences |
| RESET | Reset Input | Active-low reset; 12 V input enables boot block override - unique to AT/ANT variants |
| I/O0–I/O7 | Data Bus | Bi-directional 8-bit data interface; I/O7 used for DATA polling, I/O6 for Toggle Bit status |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage regulation ensures stable core operation across range |
| GND | Ground | Reference for all I/O and internal logic; decoupling capacitor required per datasheet layout guidelines |
| NC | No Connect | Pin 1 (PLCC) and Pin 9 (TSOP) are NC on AT49BV001AT - must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Single 2.7–3.6 V Supply | Eliminates need for separate 5 V or 12 V rails - reduces BOM count and PCB complexity in battery-powered systems |
| Boot Block Lockout | 16 KB protected region (1C000H–1FFFFH) prevents corruption of bootloader code during field firmware updates |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and control-line inhibition (OE low/CE high/WE high blocks writes) |
| Software Product Identification | Manufacturer code 1FH / device code 04H returned via 3-cycle software entry - enables automated flash detection in programming tools |
| 10,000 Write/Erase Cycles | Guaranteed endurance supports long-term deployment in programmable logic controllers and telemetry devices |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Retention |
|---|---|
Use Scenario: Storing configuration tables and ladder logic in programmable logic controllers operating in factory-floor environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with fast 55 ns read access enabling deterministic scan-cycle execution. Use Value: Sector erase capability allows updating parameter blocks without resetting the entire controller or losing boot integrity. | Use Scenario: Securing startup code in microcontroller-based medical instruments requiring FDA-compliant firmware validation. IC Role / Device Role / Timing Role: Boot block (1C000H–1FFFFH) stores immutable bootloader; main memory holds application firmware. Use Value: Boot lockout feature prevents unauthorized modification while permitting safe field upgrades to application code only. |
| Automotive ECU Calibration Data | Telecom Base Station Configuration |
Use Scenario: Holding engine calibration maps and sensor compensation coefficients in automotive engine control units. IC Role / Device Role / Timing Role: Parameter block (1A000H–1BFFFH and 18000H–19FFFH) stores modifiable tuning data accessed during runtime. Use Value: Independent 8 KB sector erase enables recalibration without rewriting boot or application firmware - reducing service time. | Use Scenario: Storing protocol stack parameters and RF channel settings in remote radio head firmware. IC Role / Device Role / Timing Role: Flash memory mapped into processor address space for direct read access during initialization and runtime reconfiguration. Use Value: DATA polling and Toggle Bit allow host processor to synchronize firmware updates without fixed delay timers - improving reliability over noisy backplane links. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-55-4C-NHE | 512 Kbit (64K × 8), 55 ns access, 3.0–3.6 V supply, no boot block lockout | Lacks dedicated boot sector protection and 1 Mbit density; requires external lock management | Select when lower density suffices and boot security is handled in software or external logic |
| MX29LV010TC-55G | 1 Mbit (128K × 8), 55 ns access, 3.0–3.6 V, includes boot block (top/bottom configurable) but no 12 V RESET override | Boot block protection is fixed at top or bottom; no hardware override for emergency reprogramming | Prefer for cost-sensitive designs where boot block location is static and 12 V override is unnecessary |
Compared with SST39VF010-55-4C-NHE and MX29LV010TC-55G, AT49BV001AT-55TI uniquely combines 1 Mbit density, 2.7 V minimum operation, programmable boot block location (1C000H–1FFFFH), and 12 V RESET-driven override - making it optimal for industrial systems requiring secure, field-upgradable firmware with minimal voltage infrastructure.
Availability
AT49BV001AT-55TI is available at Aetrix Electronics and suitable for industrial PLCs, embedded bootloaders, automotive ECUs, telecom base stations, and medical instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49BV001AT-55TI 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 ICs.
The AT49BV001AT series belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for low-voltage, in-system reprogrammable firmware storage in resource-constrained embedded systems.
FAQ
What is the boot block address range for AT49BV001AT-55TI?
The boot block for AT49BV001AT-55TI occupies address range 1C000H to 1FFFFH (16 KB). This differs from the base AT49BV001A(N), which places the boot block at 00000H–03FFFH. The relocated boot sector enables flexible memory mapping in systems where lower addresses are reserved for RAM or peripherals.
Does AT49BV001AT-55TI support 12 V RESET override for boot block programming?
Yes, AT49BV001AT-55TI supports 12 V ± 0.5 V applied to the RESET pin during chip erase, sector erase, or byte programming to temporarily disable boot block lockout. This feature is explicitly documented for AT/ANT variants and is not available on AN-only parts like AT49BV001AN-55TI.
How does DATA polling work on AT49BV001AT-55TI?
During byte programming, reading the last programmed address returns the complement of the loaded data on I/O7. Once programming completes, true data appears on all outputs. This allows the host processor to detect completion without fixed delays - a key feature confirmed in the AT49BV001AT-55TI datasheet section "DATA POLLING".
What package options are available for AT49BV001AT-55TI?
AT49BV001AT-55TI is offered in three industry-standard packages: 32-pin PLCC (32J), 32-pin TSOP (32T), and 32-pin VSOP (32V). All share identical pinout and electrical characteristics; mechanical dimensions differ per JEDEC standards MO-142 (TSOP/VSOP) and MS-016 (PLCC).
Is AT49BV001AT-55TI compatible with standard microprocessor bus timing?
Yes, AT49BV001AT-55TI uses standard microprocessor write timings: address latched on falling edge of CE or WE (whichever occurs last), data latched on rising edge of CE or WE (whichever occurs first). AC timing parameters such as tWP (30 ns), tDS (40 ns), and tDH (0 ns) align with common 8-bit MPU interfaces.
AT49BV001AT-55TI 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
AT49BV001AT-55TI FAQ
1.How can I place an order for AT49BV001AT-55TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001AT-55TI 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 AT49BV001AT-55TI reliable?
The price and inventory of AT49BV001AT-55TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001AT-55TI is usually 5 days.
3.What payment methods are accepted for AT49BV001AT-55TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001AT-55TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001AT-55TI?
AT49BV001AT-55TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001AT-55TI 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 AT49BV001AT-55TI?
For technical support, including AT49BV001AT-55TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001AT-55TI requirements.
6.How does Aetrix verify that AT49BV001AT-55TI is sourced from the original manufacturer or authorized distributors?
All AT49BV001AT-55TI 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 AT49BV001AT-55TI meets industry standards.
7.What is the process for return or replacement of AT49BV001AT-55TI?
All AT49BV001AT-55TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001AT-55TI, 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 AT49BV001AT-55TI part is unused and in its original packaging.
Return procedure for AT49BV001AT-55TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV001AT-55TI Tags
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