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Microchip Technology AT49BV001ANT-55JU
- Part No.:
- AT49BV001ANT-55JU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-LCC (J-Lead)
- Datasheet:
-
AT49BV001ANT-55JU.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32PLCC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49BV001ANT-55JU from Microchip Technology (formerly Atmel) is a 1 Mbit (128K × 8) single-supply, in-system reprogrammable Flash memory IC used for nonvolatile code and data storage in embedded controllers and boot loaders. It operates from 2.7 V to 3.6 V, delivers 55 ns read access time, supports byte-by-byte programming at 30 µs/byte, features hardware data protection, and includes a 16 KB boot block with programmable lockout - deployed in industrial temperature range (-40°C to +85°C) applications requiring secure firmware storage.
For engineers reviewing the AT49BV001ANT-55JU datasheet, AT49BV001ANT-55JU pinout, AT49BV001ANT-55JU application, or AT49BV001ANT-55JU equivalent, key selection criteria include its 55 ns read timing, sector-erasable architecture (boot + parameter + main blocks), PLCC-32 package compatibility, 10,000 program/erase cycles, and support for DATA polling and toggle-bit erase/program status detection.
Technical Context
The AT49BV001ANT-55JU implements a standard parallel Flash interface with CE/OE/WE control logic, mimicking EPROM read behavior while enabling in-system reprogramming without high-voltage inputs. Its internal command register executes software-controlled erase and program operations using six-cycle sector erase and four-cycle byte program sequences.
It features a segmented memory map: 16 KB boot block (address 1C000H–1FFFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB + 64 KB). The boot block lockout mechanism - activated via a 6-cycle command sequence - permanently protects secure boot code when enabled, and can be overridden only by applying 12 V to RESET (not available on AN(T) variants).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - sufficient for compact boot code and configuration data in space-constrained designs. |
| Read Access Time | 55 ns max - enables direct interfacing with 16–20 MHz microcontrollers without wait states. |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3 V systems and battery-powered operation down to 2.7 V. |
| Byte Programming Time | 30 µs typical - allows rapid field updates of small data segments without full-chip erase overhead. |
| Erase Cycle Time | 3 seconds max for chip or sector erase - balances speed and reliability for firmware patching workflows. |
| Endurance | 10,000 program/erase cycles - validated for long-term use in industrial firmware update cycles. |
| Standby Current | 50 µA CMOS - minimizes quiescent power in always-on embedded systems. |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade environmental robustness. |
Pinout & Package
AT49BV001ANT-55JU is packaged in a 32-lead Plastic Leaded Chip Carrier (PLCC), JEDEC MS-016 variation AE compliant, with body dimensions 12.32 mm × 14.86 mm × 3.38 mm (max height). Pin 1 is marked by a corner chamfer; pins 1 and 9 are no-connect (NC) per datasheet specification for the AN(T) variant.
| 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 during command cycles. |
| I/O0–I/O7 | Data Inputs/Outputs | 8-bit bidirectional data bus; supports DATA polling on I/O7 and toggle-bit detection on I/O6 during program/erase. |
| 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 and enable high-impedance tri-state during standby. |
| WE | Write Enable | Active-low write strobe; latches address/data during command sequences and byte programming; requires tWP ≥ 30 ns pulse width. |
| RESET | Reset Input | Active-low reset; halts ongoing operations and forces high-Z outputs; 12 V override enables boot block reprogramming (not functional on AN(T) variant). |
| VCC / GND | Power Supply | Single 2.7–3.6 V supply; CMOS standby current ≤ 50 µA ensures low-power retention in sleep modes. |
| NC | No Connect | Pins 1 and 9 are unconnected - must be left floating or tied to ground per board layout best practices; not usable as GPIO. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | Independent erasure of 16 KB boot block, two 8 KB parameter blocks, and two main memory blocks (32 KB + 64 KB) - enables selective firmware updates without full-chip erase. |
| Boot Block Programming Lockout | Hardware-enforced write protection for 16 KB boot sector (1C000H–1FFFFH); once enabled, prevents accidental overwrite of critical startup code under ≤5.5 V operation. |
| DATA Polling & Toggle Bit | Real-time program/erase completion detection via I/O7 complement read or I/O6 toggling - eliminates need for fixed delay timers in host firmware. |
| 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. |
| Green Packaging Option | Pb/Halide-free PLCC-32 package (JU suffix) - complies with RoHS Directive 2011/65/EU and supports environmentally conscious manufacturing. |
Applications
| Industrial PLC Firmware Storage | Embedded Boot Loader Memory |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile code storage IC providing fast 55 ns read access to boot firmware and real-time task code during cold start and runtime updates. Use Value: Sector-erasable architecture allows field-upgradable logic programs without replacing hardware; 10,000-cycle endurance supports multi-year maintenance cycles. |
Use Scenario: Holding secure boot code and bootloader binaries in microcontroller-based edge devices with over-the-air update capability. IC Role / Device Role / Timing Role: Dedicated boot memory IC with programmable lockout protecting initial instruction fetch from corruption during application-level flash writes. Use Value: 16 KB protected boot block (1C000H–1FFFFH) ensures system integrity; DATA polling enables deterministic update sequencing in resource-constrained hosts. |
| Medical Device Configuration Storage | Automotive Diagnostic Module Memory |
|
Use Scenario: Retaining calibrated sensor offsets, user preferences, and regulatory compliance logs in portable diagnostic instruments. IC Role / Device Role / Timing Role: Parameter storage IC with dual 8 KB parameter blocks enabling atomic swap of calibration datasets during service events. Use Value: Byte-programmable interface permits fine-grained updates; 50 µA standby current extends battery life in handheld units between clinical sessions. |
Use Scenario: Hosting diagnostic firmware and protocol stacks in OBD-II modules subjected to wide thermal cycling and EMI exposure. IC Role / Device Role / Timing Role: Industrial-grade Flash memory IC delivering reliable read/write operation across -40°C to +85°C ambient range with hardware write protection. Use Value: Hardware data protection (VCC sense, noise filter) prevents corruption during vehicle cranking transients; green packaging meets automotive RoHS requirements. |
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 density (64K × 8), 55 ns access, same 3.3 V supply; lacks boot block lockout and parameter block segmentation. | Lower capacity limits use to simpler bootloaders; no hardware-protected boot sector - requires external MCU-level protection logic. | Select when cost sensitivity outweighs boot security needs and 1 Mbit capacity is unnecessary. |
| MX29LV001CTTI-55G | 1 Mbit, 55 ns, 3.0–3.6 V; includes CFI-compliant command set but no dedicated boot block lockout feature. | Compatible pinout and timing, but lacks hardware-enforced boot protection - relies on software-only lock mechanisms vulnerable to reset glitches. | Choose for CFI-standard toolchain compatibility where boot block immutability is managed in firmware. |
Compared with SST39VF010-55-4C-NHE and MX29LV001CTTI-55G, the AT49BV001ANT-55JU uniquely provides hardware-locked 16 KB boot memory, sector-erasable parameter blocks, and 12 V RESET override - making it superior for safety-critical boot integrity in industrial and medical systems.
Availability
AT49BV001ANT-55JU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded boot loader memory, medical device configuration storage, and automotive diagnostic module memory requiring stable component supply across extended product lifecycles.
Supply support for AT49BV001ANT-55JU 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
Microchip Technology acquired Atmel in 2016 and maintains legacy Flash memory product lines including the AT49BV series, focusing on industrial and automotive-grade nonvolatile memory solutions.
The AT49BV001A(N)(T) family was designed specifically for in-system reprogrammable boot code and parameter storage in resource-constrained embedded systems, emphasizing hardware write protection, sector granularity, and single-supply operation.
FAQ
What is the function of the RESET pin on the AT49BV001ANT-55JU?
The RESET pin on the AT49BV001ANT-55JU is an active-low input that halts ongoing program or erase operations and places outputs in high-impedance state. Unlike earlier variants, the AT49BV001ANT-55JU does not support 12 V override for boot block reprogramming - this feature is explicitly disabled in the AN(T) version per datasheet Section 4.6.2. Standard TTL-level RESET (≤0.8 V) returns the device to read/standby mode.
Does the AT49BV001ANT-55JU support full-chip erase?
Yes, the AT49BV001ANT-55JU supports full-chip erase via a six-cycle software command sequence (555H/AAH → AAH/55H → 555H/80H → 555H/AAH → AAH/55H → 555H/10H). However, if the boot block lockout feature is enabled, the chip erase operation excludes the 16 KB boot block (1C000H–1FFFFH) and only erases parameter and main memory blocks - preserving secure boot code.
How is the boot block address range defined for the AT49BV001ANT-55JU?
The AT49BV001ANT-55JU uses the "T" variant memory map: its 16 KB boot block occupies addresses 1C000H to 1FFFFH, distinct from the base AT49BV001A(N) variant (00000H–03FFFH). This relocation avoids overlap with main application code and aligns with typical linker script placement for secondary boot stages. The boot block lockout command sequence targets this specific address region.
What are the valid package options for the AT49BV001ANT-55JU?
The AT49BV001ANT-55JU is exclusively offered in the 32-lead PLCC (Plastic Leaded Chip Carrier) package, denoted by the "J" suffix and "U" RoHS-compliant marking. It is not available in TSOP ("T") or VSOP ("V") packages - those variants exist only for non-"T" part numbers (e.g., AT49BV001AN-55TU). The PLCC-32 footprint matches JEDEC MS-016, Variation AE.
Can the AT49BV001ANT-55JU be used with a 5 V microcontroller interface?
No, the AT49BV001ANT-55JU is a single 2.7–3.6 V device with TTL-compatible input thresholds (VIL ≤ 0.6 V, VIH ≥ 2.0 V) but no 5 V tolerance. Direct connection to a 5 V microcontroller bus will exceed absolute maximum ratings and risk permanent damage. Level translation (e.g., TXB0108 or discrete MOSFET buffers) is required for safe interoperability.
AT49BV001ANT-55JU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-LCC (J-Lead)
- Packaging:
- Tube
- 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-PLCC (13.97x11.43)
AT49BV001ANT-55JU FAQ
1.How can I place an order for AT49BV001ANT-55JU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV001ANT-55JU 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 AT49BV001ANT-55JU reliable?
The price and inventory of AT49BV001ANT-55JU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV001ANT-55JU is usually 5 days.
3.What payment methods are accepted for AT49BV001ANT-55JU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV001ANT-55JU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV001ANT-55JU?
AT49BV001ANT-55JU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV001ANT-55JU 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 AT49BV001ANT-55JU?
For technical support, including AT49BV001ANT-55JU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV001ANT-55JU requirements.
6.How does Aetrix verify that AT49BV001ANT-55JU is sourced from the original manufacturer or authorized distributors?
All AT49BV001ANT-55JU 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 AT49BV001ANT-55JU meets industry standards.
7.What is the process for return or replacement of AT49BV001ANT-55JU?
All AT49BV001ANT-55JU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV001ANT-55JU, 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 AT49BV001ANT-55JU part is unused and in its original packaging.
Return procedure for AT49BV001ANT-55JU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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