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Microchip Technology AT49BV4096A-12TC
- Part No.:
- AT49BV4096A-12TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV4096A-12TC.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,577
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Product details
Overview
AT49BV4096A-12TC from Microchip Technology (formerly Atmel) is a 4-Mbit (512K × 8 / 256K × 16) 3V-only CMOS Flash memory IC used for nonvolatile program/data storage in embedded boot and parameter applications. It features 120 ns read access, sector-based erase architecture (8K-word boot block + two 4K-word parameter blocks + 240K-word main array), 30 µs byte/word programming, and hardware data protection with RESET-controlled boot lockout override.
For engineers reviewing the AT49BV4096A-12TC datasheet, AT49BV4096A-12TC pinout, AT49BV4096A-12TC application, or AT49BV4096A-12TC equivalent, key selection considerations include bottom-boot sector addressing (00000H–01FFFH), TSOP-48 package compatibility, 2.7–3.6V single-supply operation, RDY/BUSY signaling absence (no dedicated pin), and BYTE-mode configuration for 8-bit vs. 16-bit bus interface.
Technical Context
The AT49BV4096A-12TC implements a command-register-based Flash architecture with software-controlled sector erase and byte/word programming. Its internal state machine handles timing-critical operations including chip erase (10 s max), sector erase (10 s), and embedded programming-eliminating need for external pulse generators or high-voltage supplies.
It supports dual-bus-width operation via the BYTE pin: logic high or open enables 16-bit word mode (I/O₀–I/O₁₅ active); logic low enables 8-bit byte mode (I/O₀–I/O₇ active, I/O₁₅ repurposed as A₋₁ address input). Sector addressing uses A₁₇–A₀, with boot block at 01XXXH, parameter blocks at 02XXXH/03XXXH, and main array at 3FXXXH.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (512K × 8 or 256K × 16 organization) |
| Read Access Time | 120 ns - determines maximum sustained read throughput in microcontroller or FPGA boot interfaces |
| Supply Voltage | 2.7 V to 3.6 V - compatible with 3.3V system rails without level-shifting |
| Active Current | 25 mA - defines peak power draw during sequential reads or writes |
| Standby Current | 50 µA CMOS - enables low-power retention in battery-backed or always-on systems |
| Erase Cycle Time | 10 seconds typical - sets minimum latency for firmware updates or configuration resets |
| Programming Endurance | 10,000 write/erase cycles - specifies field lifetime for reprogrammable boot code or calibration data |
Pinout & Package
AT49BV4096A-12TC is housed in a 48-lead Plastic Thin Small Outline Package (TSOP-48, Type 1), 12 mm × 20 mm body, 0.5 mm lead pitch. Pin 1 is top-left corner (marking dot adjacent), with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A₀–A₁₇ | Address Inputs | 18-bit address bus supporting full 512K-byte addressing space; A₋₁ function on I/O₁₅ in byte mode |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read output |
| OE | Output Enable | Active-low output gate; controls tri-state of I/O pins independent of CE during read |
| WE | Write Enable | Active-low control for write/erase command latching; falling edge captures address, rising edge latches data |
| BYTE | Bus Width Select | Logic high = 16-bit word mode (I/O₀–I/O₁₅); logic low = 8-bit byte mode (I/O₀–I/O₇ active, I/O₁₅ = A₋₁) |
| I/O₀–I/O₇ | Data I/O (Byte Mode) | Bi-directional 8-bit data bus when BYTE = 0; high-impedance when not selected |
| I/O₀–I/O₁₅ | Data I/O (Word Mode) | Bi-directional 16-bit data bus when BYTE = 1 or open; I/O₈–I/O₁₄ tri-stated in byte mode |
| I/O₁₅ / A₋₁ | Multi-function Terminal | In word mode: data bit 15; in byte mode: LSB address input for byte-aligned access |
| RESET | Hardware Reset | Active-low reset; applying 12 V ±0.5 V overrides boot block lockout during erase/program |
| VPP | Optional Programming Supply | No-connect by default; optional 5 V ±10% supply for accelerated program/erase (requires factory option) |
| VCC, GND | Power & Ground | Single 2.7–3.6 V supply; dual GND pins (pins 24, 47) for noise reduction in high-speed operation |
Key Features
| Feature | Design Value |
|---|---|
| Bottom-boot sector architecture | Fixed 8K-word (16 KB) boot block at 00000H–01FFFH - ensures secure, early-access firmware execution on power-up |
| Hardware-programmable boot lockout | Command-activated write protection prevents accidental overwrite of boot code under ≤3.6 V; overridden only with 12 V RESET |
| Embedded erase/program algorithms | Internal timing eliminates need for external clocks or pulse generators - simplifies host controller firmware |
| Data polling & toggle bit status | I/O₇ complement and I/O₆ toggling provide real-time, bus-compatible end-of-operation detection without RDY/BUSY pin |
| 5.5 V-tolerant inputs | All address and control inputs (A₀–A₁₇, CE, OE, WE) accept 0–5.5 V - enables direct interfacing with 5 V microcontrollers |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing certified bootloader and safety-critical initialization routines in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup sequence with hardware-protected integrity verification. Use Value: Bottom-boot addressing ensures immediate CPU access to first instruction; 10,000-cycle endurance supports field firmware updates across product lifecycle. | Use Scenario: Holding FDA-compliant boot firmware and device calibration parameters in portable diagnostic equipment requiring long-term data retention. IC Role / Device Role / Timing Role: Secure, low-power Flash storage for certified boot code and runtime configuration data. Use Value: 50 µA standby current extends battery life; boot lockout prevents unauthorized modification of regulatory-approved code. |
| Automotive Infotainment System Parameter Bank | Network Router Configuration Storage |
Use Scenario: Retaining user preferences, audio profiles, and vehicle-specific settings across ignition cycles in automotive head units. IC Role / Device Role / Timing Role: Parameter block Flash memory supporting fast, selective sector erase for individual setting groups. Use Value: Dual 4K-word parameter blocks allow atomic update of related settings without disturbing boot or main firmware. | Use Scenario: Storing persistent configuration tables, MAC addresses, and security keys in enterprise-grade Ethernet switches. IC Role / Device Role / Timing Role: Reconfigurable nonvolatile memory enabling zero-touch provisioning and remote firmware rollback. Use Value: 120 ns read speed ensures rapid config loading during boot; 2.7–3.6 V operation matches PoE-powered board voltage rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-EKE | 4 Mbit, 70 ns access, 3.0–3.6 V, same TSOP-48 footprint but top-boot architecture (boot block at highest addresses) | Requires address remapping for boot code; lacks RESET-based lockout override | Select if faster read timing is critical and boot block location flexibility is acceptable |
| MX29LV400CTTI-70G | 4 Mbit, 70 ns, 2.7–3.6 V, top-boot variant with CFI-compliant command set and hardware write protection | CFI interface simplifies driver portability; no VPP option or 12 V override capability | Choose for standardized flash abstraction layers and industrial temperature support (-40°C to +85°C) |
Compared with SST39VF400A-70-4C-EKE and MX29LV400CTTI-70G, the AT49BV4096A-12TC offers unique bottom-boot addressing with hardware-enforced lockout override via 12 V RESET - critical for secure, field-upgradable embedded systems where boot integrity is non-negotiable.
Availability
AT49BV4096A-12TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, and automotive infotainment parameter banks requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for AT49BV4096A-12TC 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 full technical and manufacturing continuity for legacy Atmel Flash products.
The AT49BV4096A-12TC belongs to Atmel's BV-series 3V Flash memory family, designed specifically for cost-sensitive, low-power embedded systems requiring reliable in-system reprogrammability without high-voltage programming circuitry.
FAQ
What is the boot block address range for AT49BV4096A-12TC?
The AT49BV4096A-12TC implements bottom-boot architecture with its 8K-word (16 KB) boot block located at address range 00000H to 01FFFH. This fixed low-address placement ensures immediate CPU access during power-on reset and distinguishes it from top-boot variants like AT49BV4096AT, which locates the boot block at 3E000H–3FFFFH.
Does AT49BV4096A-12TC support both 8-bit and 16-bit data bus interfaces?
Yes, AT49BV4096A-12TC supports configurable bus width via the BYTE pin. When BYTE = 1 or open, it operates in 16-bit word mode with I/O₀–I/O₁₅ active. When BYTE = 0, it switches to 8-bit byte mode: I/O₀–I/O₇ are active data lines, and I/O₁₅ functions as the A₋₁ address input for byte-aligned addressing.
How is boot block programming lockout enabled and overridden on AT49BV4096A-12TC?
Boot block lockout on AT49BV4096A-12TC is enabled via a six-cycle command sequence (5555H/AAh → 2AAAH/55h → 5555H/80h → 5555H/AAh → 2AAAH/55h → 5555H/40h). Once enabled, programming is blocked under ≤3.6 V. Override requires applying 12 V ±0.5 V to the RESET pin during erase or program operations - a hardware-level safeguard not dependent on software commands.
What status monitoring methods does AT49BV4096A-12TC provide without a dedicated RDY/BUSY pin?
AT49BV4096A-12TC provides two bus-compatible status monitoring methods: DATA polling (I/O₇ returns complement of written data until operation completes) and Toggle Bit detection (I/O₆ toggles between 0 and 1 during active erase/program cycles). Both operate using standard read cycles and require no additional pins - essential for pin-constrained designs.
Is VPP required for normal operation of AT49BV4096A-12TC?
No, VPP is optional and unconnected (NC) by default on AT49BV4096A-12TC. The device performs all erase and program operations using only the 2.7–3.6 V VCC supply. VPP (5 V ±10%) is available only as a factory-configurable option to reduce program/erase times - contact Microchip for availability and ordering codes with VPP functionality.
AT49BV4096A-12TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-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:
- 4Mbit
- Memory Organization:
- 512K x 8, 256K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 30µs
- Access Time:
- 120 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV4096A-12TC FAQ
1.How can I place an order for AT49BV4096A-12TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV4096A-12TC 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 AT49BV4096A-12TC reliable?
The price and inventory of AT49BV4096A-12TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV4096A-12TC is usually 5 days.
3.What payment methods are accepted for AT49BV4096A-12TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV4096A-12TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV4096A-12TC?
AT49BV4096A-12TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV4096A-12TC 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 AT49BV4096A-12TC?
For technical support, including AT49BV4096A-12TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV4096A-12TC requirements.
6.How does Aetrix verify that AT49BV4096A-12TC is sourced from the original manufacturer or authorized distributors?
All AT49BV4096A-12TC 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 AT49BV4096A-12TC meets industry standards.
7.What is the process for return or replacement of AT49BV4096A-12TC?
All AT49BV4096A-12TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV4096A-12TC, 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 AT49BV4096A-12TC part is unused and in its original packaging.
Return procedure for AT49BV4096A-12TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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