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Microchip Technology AT49BV002AN-70TU
- Part No.:
- AT49BV002AN-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV002AN-70TU.pdf
- Description:
- IC FLASH 2MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,006
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Product details
Overview
AT49BV002AN-70TU from Atmel is a 2.7 V–3.6 V single-supply, in-system reprogrammable Flash memory IC with 2 Mbit (256K × 8) capacity, 70 ns read access time, and sector-based erase architecture including one 16 KB boot block with programming lockout-used for secure firmware storage in embedded microcontroller boot loaders.
For engineers reviewing the AT49BV002AN-70TU datasheet, AT49BV002AN-70TU pinout, AT49BV002AN-70TU application, or AT49BV002AN-70TU equivalent, this page delivers verified electrical specs, PLCC-32 package mapping, boot-block protection behavior, byte-programming timing (30 µs), and real-world use cases in industrial control firmware updates and legacy system BIOS storage.
Technical Context
The AT49BV002AN-70TU implements standard EPROM-compatible read interface (CE/OE/WE control), software command-set programming (555H/AAH, AAH/55H sequences), and internal state-machine-controlled erase cycles. It supports chip erase (max 4 s), sector erase (parameter blocks: 2 × 8 KB; main blocks: 1 × 32 KB + 3 × 64 KB), and byte-by-byte programming without external high-voltage circuitry.
Its boot block (00000H–03FFFH) features permanent lockout after enable-irreversible under ≤5.5 V-and RESET pin is NC (no connect), distinguishing it from AT49BV002A(T) variants. Hardware data protection includes VCC sense (<1.8 V inhibits program), noise filtering (<15 ns pulses ignored), and control-line inhibit logic (OE low / CE high / WE high).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 2 Mbit (256K × 8), organized as 262,144 words × 8 bits-directly replaces 27C020 EPROMs in 8-bit bus systems. |
| Read Access Time | 70 ns max at VCC = 2.7–3.6 V-enables direct interfacing with 14 MHz microcontrollers without wait states. |
| Byte Programming Time | 30 µs typical-supports rapid field firmware patching with minimal host CPU overhead. |
| Erase Cycle Time | 4 seconds max for full chip erase-deterministic timing allows predictable update windows in embedded OTA workflows. |
| Supply Voltage Range | 2.7 V to 3.6 V only-eliminates need for 5 V or 12 V programming supplies; compatible with battery-powered systems. |
| Standby Current | 50 µA CMOS standby-critical for low-power industrial sensors and metering devices with infrequent firmware updates. |
| Endurance | 10,000 write/erase cycles-validated for long-term deployment in programmable logic controllers and HMI firmware storage. |
| Operating Temperature | −40°C to +85°C industrial range-qualified for use in motor drives, factory automation I/O modules, and outdoor telemetry units. |
Pinout & Package
AT49BV002AN-70TU is supplied in a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE. Pin 1 is marked by corner chamfer; pin 1 is NC (no connect) per datasheet note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A17 | Address Inputs | 18-bit address bus supporting full 256K-word addressing; A11 is don't-care during command sequences. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; controls device selection on shared buses. |
| OE | Output Enable | Active-low output gate; used with CE to prevent bus contention; high-Z when inactive. |
| WE | Write Enable | Active-low write strobe; latches address/data during programming/erase command sequences; must be high for reads. |
| I/O0–I/O7 | Data Bus | Bi-directional 8-bit data interface; carries command codes, product ID, and memory contents; supports DATA polling on I/O7 and toggle bit on I/O6. |
| VCC | Power Supply | 2.7–3.6 V core supply; internal regulation enables stable operation across battery discharge curves. |
| GND | Ground Reference | Signal and power return; decoupling capacitor (0.1 µF) required near VCC pin for noise immunity during erase cycles. |
| RESET* | No Connect (NC) | Pin 1 on PLCC/DIP and pin 9 on TSOP are unconnected-boot block override via 12 V on RESET is not supported on AT49BV002AN(T) variants. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | Independent erasure of two 8 KB parameter blocks and four main memory blocks (32 KB + 3 × 64 KB)-enables selective firmware module updates without full reflash. |
| Boot Block Programming Lockout | 16 KB boot sector (00000H–03FFFH) permanently protected after enable-ensures bootloader integrity in safety-critical applications like medical device initialization. |
| DATA Polling & Toggle Bit | I/O7 complement feedback and I/O6 toggling provide hardware-confirmed end-of-program detection-eliminates need for fixed delay timers in host firmware. |
| Hardware Data Protection | VCC sense, noise filtering, and multi-line inhibit logic prevent accidental writes during power transients or ESD events-reduces field failure risk in noisy industrial environments. |
| Single 2.7–3.6 V Operation | No 5 V or 12 V programming voltage required-simplifies PCB design and reduces BOM count in battery-backed or USB-powered embedded systems. |
Applications
| Industrial PLC Firmware Storage | Legacy Embedded System BIOS |
|---|---|
|
Use Scenario: Storing ladder logic firmware and configuration parameters in programmable logic controllers deployed in factory automation lines. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; 70 ns read speed ensures deterministic scan-cycle timing during real-time I/O processing. Use Value: Enables remote firmware updates over RS-485 without controller replacement; boot block lockout prevents corruption of critical startup routines during partial reflash. |
Use Scenario: Holding BIOS and POST code in legacy x86-based industrial PCs used in kiosks and point-of-sale terminals. IC Role / Device Role / Timing Role: Drop-in EPROM replacement with identical 32-pin DIP/PLCC footprint and CE/OE/WE timing-no board redesign needed. Use Value: Eliminates need for UV-erasable EPROM programmers; 2.7 V operation extends battery backup life during power-loss firmware recovery sequences. |
| Motor Drive Bootloader Storage | Smart Meter Firmware Archive |
|
Use Scenario: Securing bootloader code in variable-frequency drives where corrupted startup code could cause unsafe motor behavior. IC Role / Device Role / Timing Role: Read-only boot sector (00000H–03FFFH) with irreversible lockout; main array stores application firmware updated via CAN bus. Use Value: Prevents unauthorized modification of safety-critical boot code while allowing certified firmware patches to main memory blocks. |
Use Scenario: Archiving firmware revisions and calibration tables in ANSI C12.22-compliant smart electricity meters operating on lithium-thionyl chloride batteries. IC Role / Device Role / Timing Role: Low-power nonvolatile storage with 50 µA standby current-extends 15-year battery life; sector erase minimizes update energy consumption. Use Value: Supports regulatory-mandated field upgrades without meter replacement; boot block holds metrology-certified constants immune to field updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF200A-70-4C-NHE | 2 Mbit, 70 ns, 3.0–3.6 V supply; supports both top- and bottom-boot sectors; no NC RESET pin limitation. | Offers flexible boot sector location (00000H or 3C000H); suitable for designs requiring boot block relocation or RESET-based override. | Select if boot block address flexibility or RESET functionality is required-AT49BV002AN-70TU lacks RESET pin and fixes boot block at 00000H–03FFFH. |
| MX29LV200CBTI-70G | 2 Mbit, 70 ns, 3.0–3.6 V; includes CFI query mode and wider temperature range (−40°C to +105°C); 50 µA standby current. | CFI support simplifies auto-detection in generic flash programmers; extended temp rating suits automotive under-hood applications. | Choose for CFI-compliant toolchains or higher-temp environments-AT49BV002AN-70TU lacks CFI and is rated only to +85°C. |
Compared with SST39VF200A-70-4C-NHE and MX29LV200CBTI-70G, the AT49BV002AN-70TU offers proven legacy compatibility and simpler command set but lacks boot sector flexibility and CFI support-making it optimal for cost-sensitive, volume industrial designs where pinout and timing match existing 27C020 layouts.
Availability
AT49BV002AN-70TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy embedded system BIOS, motor drive bootloader storage, and smart meter firmware archive applications requiring stable component supply and long-lifecycle support.
Supply support for AT49BV002AN-70TU 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 industrial, automotive, and consumer applications.
The AT49BV002AN-70TU belongs to Atmel's Battery-Voltage™ Flash memory family, designed specifically for single-supply, in-system reprogrammable code storage in resource-constrained embedded systems operating from battery or low-voltage rails.
FAQ
What is the boot block address range for AT49BV002AN-70TU?
The AT49BV002AN-70TU boot block occupies address range 00000H to 03FFFH (16 KB). This is fixed and differs from the AT49BV002AT variant, which places the boot block at 3C000H–3FFFFH. The AT49BV002AN-70TU boot block lockout feature, once enabled, permanently protects this region under ≤5.5 V operation.
Is the RESET pin functional on AT49BV002AN-70TU?
No-the RESET pin is NC (no connect) on AT49BV002AN-70TU. Datasheet Note states pin 1 on PLCC and DIP packages and pin 9 on TSOP packages are unconnected. Unlike AT49BV002A(T), the AT49BV002AN-70TU does not support 12 V RESET override for boot block reprogramming.
What package type is used for AT49BV002AN-70TU?
AT49BV002AN-70TU uses a 32-lead Plastic Leaded Chip Carrier (PLCC) package per JEDEC MS-016, Variation AE. Its dimensions are 12.32 mm × 14.86 mm × 3.35 mm (max height), with pin 1 identified by a corner chamfer and lead pitch of 1.27 mm.
How does DATA polling work on AT49BV002AN-70TU?
During byte programming, reading the last written address returns the complement of the loaded data on I/O7. Once programming completes, true data appears on I/O7. This allows the host microcontroller to poll I/O7 without fixed delays-AT49BV002AN-70TU guarantees valid polling response within tBP (30–50 µs) after write pulse.
Can AT49BV002AN-70TU be used as a direct replacement for 27C020 EPROMs?
Yes-AT49BV002AN-70TU matches the 27C020's 256K × 8 organization, 32-pin PLCC/DIP footprint, and CE/OE/WE control interface. Its 70 ns read access time meets or exceeds 27C020-12 (120 ns) and 27C020-15 (150 ns) speeds, enabling drop-in replacement without timing adjustments.
AT49BV002AN-70TU 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:
- 2Mbit
- Memory Organization:
- 256K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 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
AT49BV002AN-70TU FAQ
1.How can I place an order for AT49BV002AN-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV002AN-70TU 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 AT49BV002AN-70TU reliable?
The price and inventory of AT49BV002AN-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV002AN-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV002AN-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV002AN-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV002AN-70TU?
AT49BV002AN-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV002AN-70TU 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 AT49BV002AN-70TU?
For technical support, including AT49BV002AN-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV002AN-70TU requirements.
6.How does Aetrix verify that AT49BV002AN-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV002AN-70TU 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 AT49BV002AN-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV002AN-70TU?
All AT49BV002AN-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV002AN-70TU, 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 AT49BV002AN-70TU part is unused and in its original packaging.
Return procedure for AT49BV002AN-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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