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Microchip Technology AT49BV001T-90TC
- Part No.:
- AT49BV001T-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV001T-90TC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,206
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Product details
Overview
AT49BV001T-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 microcontroller-based industrial controllers.
For engineers reviewing the AT49BV001T-90TC datasheet, AT49BV001T-90TC pinout, AT49BV001T-90TC application, or AT49BV001T-90TC equivalent, key selection considerations include its 2.7–3.6 V operating range, 10-second chip erase time, byte-programmable architecture with DATA polling, boot block lockout override via 12 V RESET, and TSOP-32 package compatibility with legacy 8-bit bus interfaces.
Technical Context
The AT49BV001T-90TC implements a command-register-based programming model using standard microprocessor timing, with WE/CE-controlled write cycles and OE-controlled output enable. Its internal logic handles erase timing autonomously-no external clocks required-and supports both full-chip and sector-erase operations via six-cycle software command sequences.
It features dual-level hardware protection: VCC sense inhibits programming below 1.8 V, and noise filtering rejects sub-15 ns pulses on WE/CE. The boot block (1C000H–1FFFFH) supports permanent lockout activation and 12 V RESET override, distinguishing it from non-T variants where boot block address mapping differs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Capacity | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits |
| Read Access Time | 90 ns max - determines minimum bus cycle time in 8-bit parallel interfaces |
| Supply Voltage | 2.7–3.6 V - enables direct connection to 3.3 V logic without level shifters |
| Byte Programming Time | 30 µs typical - enables fast field updates of small firmware patches |
| Erase Cycle Time | 10 seconds max - defines worst-case firmware recovery latency during field reflash |
| End-of-Program Detection | DATA polling (I/O7 complement) or Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware |
| Boot Block Address Range | 1C000H–1FFFFH (16 KB) - isolates secure bootloader code from application updates |
Pinout & Package
AT49BV001T-90TC uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm). Pin 1 is NC (not connected); pin 9 is RESET* (active-low, 12 V override capable).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and 68K family microcontrollers |
| CE | Chip Enable | Active-low chip select; enables device on shared data bus when low |
| OE | Output Enable | Active-low output control; prevents bus contention during read operations |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase commands |
| RESET* | Reset Input | Active-low reset; 12 V input enables boot block reprogramming even when lockout is active |
| VCC | Power Supply | 2.7–3.6 V supply; powers core logic and I/O buffers |
| GND | Ground | Reference return path for all signals and power |
| NC | No Connect | Pin 1 - must be left unconnected per datasheet; not internally bonded |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | Independent erasure of 8 KB parameter blocks and 32/64 KB main memory blocks enables selective firmware updates without full chip erase |
| Boot Block Lockout | 16 KB boot sector (1C000H–1FFFFH) can be permanently write-protected; prevents accidental corruption of bootloader code |
| 12 V RESET Override | Applying 12 V ± 0.5 V to RESET* bypasses boot block lockout during chip/sector erase or byte programming |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and CE/OE/WE interlock prevent spurious writes during power-up or EMI events |
| DATA Polling & Toggle Bit | Real-time program/erase completion detection without fixed delays - reduces host CPU overhead and improves update reliability |
Applications
| Industrial PLC Firmware Storage | Embedded Bootloader Memory |
|---|---|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory mapped into microcontroller address space; accessed via 8-bit parallel bus with 90 ns read timing. Use Value: Sector architecture allows independent update of control logic and I/O driver modules; boot block lockout ensures bootloader integrity across firmware revisions. | Use Scenario: Holding secure boot code in medical diagnostic equipment requiring certified firmware validation before application execution. IC Role / Device Role / Timing Role: Primary boot memory for ARM Cortex-M or 8051-based hosts; initialized at power-on reset with verified checksum and signature checks. Use Value: 12 V RESET override enables authorized field recovery of corrupted bootloader without PCB redesign or socket replacement. |
| Telecom Base Station Configuration | Automotive Body Control Module |
Use Scenario: Storing calibration tables, feature enable bits, and country-specific radio settings in cellular baseband units operating across temperature ranges. IC Role / Device Role / Timing Role: Parameter memory accessed during initialization; supports rapid reconfiguration via sector-erase of 8 KB parameter blocks. Use Value: Low 50 µA CMOS standby current extends battery backup runtime; 10,000 write cycles exceed lifetime requirements for field-upgradable telecom infrastructure. | Use Scenario: Retaining vehicle-specific configuration data (e.g., door lock behavior, mirror position presets) in automotive BCMs subjected to wide thermal cycling. IC Role / Device Role / Timing Role: EEPROM-replacement memory with faster write performance and higher endurance than legacy serial EEPROMs. Use Value: Hardware data protection (VCC sense, noise filtering) prevents unintended writes during engine cranking voltage dips or load dump transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49BV001T-90JI | Same die, industrial temperature grade (–40°C to +85°C) and PDIP-32 package | Requires through-hole PCB assembly; lacks TSOP-32 footprint compatibility | Select for prototyping or legacy through-hole designs needing extended temperature operation |
| SST39VF010-90-4C-NHE | 1 Mbit 3.3 V Flash with 90 ns access, but no 12 V RESET override and different command set | Boot block protection requires software-managed lock bits; no hardware override path | Select when strict Atmel command compatibility is not required and lower cost is prioritized over field-recovery capability |
Compared with AT49BV001T-90TC, AT49BV001T-90JI offers identical functionality in a through-hole package for industrial environments, while SST39VF010 provides cost-effective alternative flash without hardware boot block override-making AT49BV001T-90TC uniquely suited for safety-critical field-upgrade scenarios.
Availability
AT49BV001T-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded bootloader memory, telecom base station configuration, and automotive body control module applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49BV001T-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, nonvolatile memory, and security ICs for embedded systems.
The AT49BV/LV series was designed as pin-compatible, in-system reprogrammable Flash memory for replacing EPROMs and EEPROMs in 8-bit microcontroller systems, emphasizing robustness, sector flexibility, and hardware-level data protection.
FAQ
What is the boot block address range for AT49BV001T-90TC?
The boot block address range for AT49BV001T-90TC is 1C000H to 1FFFFH (16 KB). This differs from non-T variants (e.g., AT49BV001), which use 00000H–03FFFH. The T-suffix denotes top-boot architecture, placing the protected boot sector at the highest memory addresses - a critical detail for linker script configuration and bootloader placement in the AT49BV001T-90TC.
Does AT49BV001T-90TC support 12 V programming override?
Yes, AT49BV001T-90TC supports 12 V ± 0.5 V applied to the RESET* pin to override boot block programming lockout during chip erase, sector erase, or byte programming. This feature is explicitly documented for the AT49BV001(N)T family and is not available on N-suffix variants. The override is temporary: once RESET* returns to TTL levels, lockout reactivates - ensuring AT49BV001T-90TC maintains security after authorized recovery.
What package type is used by AT49BV001T-90TC?
AT49BV001T-90TC uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), designated as package code "32T" in Atmel's ordering information. Pin 1 is NC (not connected), and pin 9 is the active-low RESET* input. This surface-mount package enables high-density PCB layouts and is compatible with standard reflow soldering profiles - a key implementation advantage of the AT49BV001T-90TC over through-hole alternatives.
How does AT49BV001T-90TC detect end-of-program without fixed delays?
AT49BV001T-90TC provides two hardware methods: DATA polling (reading the last programmed byte yields complemented data on I/O7 until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during programming, then stabilizes). Both operate asynchronously and require no timer resources from the host microcontroller - significantly improving firmware update reliability and reducing code complexity in systems using AT49BV001T-90TC.
Is AT49BV001T-90TC compatible with 5 V microcontrollers?
No, AT49BV001T-90TC is a 3V-only device with absolute maximum input voltage of 6.25 V, but its DC input thresholds (VIL = 0.6 V, VIH = 2.0 V) and 2.7–3.6 V VCC requirement make it incompatible with direct 5 V logic interfacing. Level translation is mandatory when connecting to 5 V microcontrollers. This electrical constraint is inherent to the AT49BV001T-90TC design and must be addressed in schematic layout.
AT49BV001T-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
AT49BV001T-90TC FAQ
1.How can I place an order for AT49BV001T-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001T-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 AT49BV001T-90TC reliable?
The price and inventory of AT49BV001T-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001T-90TC is usually 5 days.
3.What payment methods are accepted for AT49BV001T-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001T-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001T-90TC?
AT49BV001T-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001T-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 AT49BV001T-90TC?
For technical support, including AT49BV001T-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001T-90TC requirements.
6.How does Aetrix verify that AT49BV001T-90TC is sourced from the original manufacturer or authorized distributors?
All AT49BV001T-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 AT49BV001T-90TC meets industry standards.
7.What is the process for return or replacement of AT49BV001T-90TC?
All AT49BV001T-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001T-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 AT49BV001T-90TC part is unused and in its original packaging.
Return procedure for AT49BV001T-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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