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Microchip Technology AT49F512-70VU
- Part No.:
- AT49F512-70VU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F512-70VU.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,905
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Product details
Overview
AT49F512-70VU from Atmel is a 512 Kbit (64K × 8) single-voltage 5 V-only Flash memory IC with 70 ns read access time, 10 µs/byte programming, 10-second chip erase, and an 8K-byte boot block with hardware lockout. It operates across industrial temperature range (−40°C to +85°C) in a 32-lead VSOP package and is used in embedded firmware storage, BIOS code retention, and boot loader applications.
For engineers reviewing the AT49F512-70VU datasheet, AT49F512-70VU pinout, AT49F512-70VU application, or AT49F512-70VU equivalent, key selection considerations include its 5 V-only operation, boot sector write protection, DATA polling/toggle bit for cycle completion detection, CMOS standby current of 100 µA, and compatibility with standard EPROM read timing interfaces.
Technical Context
The AT49F512-70VU implements a nonvolatile Flash architecture with internal program control logic and a dedicated command register for byte programming, chip erase, and boot block lockout. Its operation relies on six-byte software command sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h) executed via address/data bus without external high-voltage inputs.
It supports three primary operational modes: EPROM-compatible read (CE/OE low, WE high), byte programming (CE low, WE low, OE high), and chip erase (six-cycle command sequence). Hardware data protection includes VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored), and dual-line bus control to prevent contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), organized as 65,536 words × 8 bits - directly maps to 16-bit address bus with A0–A15. |
| Read Access Time | 70 ns maximum - defines minimum clock period for synchronous read cycles in microcontroller or FPGA boot interfaces. |
| Byte Programming Time | 10 µs typical - enables rapid field updates of small firmware patches without full reflash downtime. |
| Chip Erase Time | 10 seconds maximum - determines worst-case firmware recovery time after corruption or version rollback. |
| Boot Block Size | 8 Kbytes (0000h–1FFFh) - reserves secure space for immutable bootloader code, isolated from main array updates. |
| Standby Current | 100 µA CMOS - ensures ultra-low power retention during system sleep states in battery-backed systems. |
| Endurance | 10,000 program/erase cycles - specifies lifetime limit for field-upgradable firmware in industrial controllers. |
Pinout & Package
AT49F512-70VU is housed in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm footprint, compliant with JEDEC MO-142 Variation BA. Pin 1 identifier located at top-left corner with beveled edge marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A0 least significant bit for byte-level access. |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with 8051, Z80, and microcontroller data buses; supports read, program, and identification modes. |
| CE | Chip Enable | Active-low chip select; must be low for read/program operations; high-Z output when asserted high. |
| OE | Output Enable | Active-low output control; used with CE to gate data bus and prevent contention during shared-bus operation. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling edge for programming; inhibits writes when high. |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and charge pumps; VCC sense circuit disables programming below 3.8 V. |
| GND | Ground | Reference return path for all I/O and internal circuits; requires low-impedance connection to minimize noise coupling. |
| NC | No Connect | Two unconnected pins (pins 29 and 30 per VSOP top view); must remain floating - no external tie required. |
Key Features
| Feature | Design Value |
|---|---|
| 5 V-only operation | Eliminates need for 12 V programming voltage - simplifies power design and enables direct integration with 5 V logic rails. |
| Hardware boot block lockout | Permanently protects 8 KB (0000h–1FFFh) from erasure/programming once enabled - ensures bootloader integrity during field firmware updates. |
| DATA polling & toggle bit | Dual-cycle completion detection (I/O7 complement / I/O6 toggling) - removes need for fixed delay timers in host firmware. |
| Internal program timer | Automatically generates required programming pulses and timing - relieves host controller of precise pulse-width control. |
| Green Pb/Halide-free packaging | Meets RoHS Directive 2011/65/EU - supports compliance in industrial and medical end equipment without lead-free soldering compromises. |
Applications
| Industrial PLC Firmware Storage | Embedded BIOS Retention |
|---|---|
Use Scenario: Storing ladder logic and configuration parameters in programmable logic controllers requiring infrequent but reliable field updates. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with boot block protection ensuring safe restart after power loss or reset. Use Value: 10,000-cycle endurance and 100 µA standby current enable long-term deployment in unattended factory-floor environments. | Use Scenario: Holding BIOS initialization code and hardware abstraction layer in x86-compatible embedded motherboards. IC Role / Device Role / Timing Role: Boot memory mapped at 0x00000, accessed during CPU reset vector fetch with 70 ns read latency. Use Value: EPROM-compatible read interface allows drop-in replacement without modifying chipset glue logic or timing constraints. |
| Medical Device Boot Loader | Telecom Edge Node Configuration |
Use Scenario: Securing certified boot loader code in FDA-cleared diagnostic instruments where firmware tampering must be physically prevented. IC Role / Device Role / Timing Role: Isolated boot block (0000h–1FFFh) stores signed bootloader; main array holds updatable application firmware. Use Value: Hardware lockout prevents accidental or malicious overwrite of bootloader - satisfies IEC 62304 SW safety requirements. | Use Scenario: Storing protocol stacks and calibration tables in remote DSLAM line cards subject to frequent field upgrades. IC Role / Device Role / Timing Role: In-system programmable Flash enabling over-the-air (OTA) firmware patching via serial management interface. Use Value: 10 µs/byte programming and DATA polling allow efficient partial updates without full chip erase delays. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV512-70EC | 48-pin TSOP, 3.3 V core with 5 V I/O tolerance; 70 ns read, 10 µs byte program - same density and timing but different voltage architecture. | Requires level-shifting for pure 5 V systems; better suited for mixed-voltage designs with 3.3 V microcontrollers. | Select if migrating to lower-power 3.3 V platforms; not pin-compatible with AT49F512-70VU. |
| SST39VF512-70-4C-NHE | 32-pin TSOP, 3.3 V only, 70 ns read, 10 µs byte program; includes automatic erase suspend/resume - lacks boot block lockout feature. | Supports interrupt-driven firmware updates but offers no hardware-protected boot region. | Choose when suspend capability is critical and boot security is handled externally; requires PCB redesign due to different pinout. |
Compared with AM29LV512-70EC and SST39VF512-70-4C-NHE, the AT49F512-70VU uniquely delivers 5 V-only operation with integrated boot block lockout in a compact VSOP package - making it optimal for legacy 5 V embedded systems requiring guaranteed bootloader integrity without voltage translation.
Availability
AT49F512-70VU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, embedded BIOS retention, and medical device boot loader applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT49F512-70VU 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, Flash memory, and secure authentication devices.
The AT49F512 product line was designed for cost-sensitive, 5 V-based embedded systems requiring field-upgradable nonvolatile storage with hardware-enforced boot code protection - targeting industrial control, telecom infrastructure, and legacy PC-compatible platforms.
FAQ
What is the operating temperature range for the AT49F512-70VU?
The AT49F512-70VU is rated for industrial temperature operation from −40°C to +85°C. This range is validated per the DC and AC operating specifications in the datasheet, with parameters including tACC = 70 ns, ICC active current ≤40 mA, and ISB1 standby current ≤300 µA tested across this full interval. The VSOP package's thermal characteristics support reliable operation under sustained industrial ambient conditions.
Does the AT49F512-70VU require external high-voltage programming signals?
No, the AT49F512-70VU does not require external high-voltage programming signals. It uses 5 V-only operation for both read and reprogramming functions. Programming is initiated via six-byte software command sequences applied to the standard address/data bus (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h), and internal charge pumps generate necessary voltages. VCC sense circuitry disables programming if supply drops below 3.8 V.
How is boot block protection enabled on the AT49F512-70VU?
Boot block protection on the AT49F512-70VU is enabled by executing a specific six-cycle command sequence: load AAh to address 5555h, 55h to 2AAAh, 80h to 5555h, AAh to 5555h, 55h to 2AAAh, then 40h to 5555h - with a 1-second pause before the final step. Once activated, the 8 KB boot block (0000h–1FFFh) becomes permanently read-only; status can be verified via software product identification mode reading I/O0 at address 00002h.
What methods does the AT49F512-70VU provide to detect completion of a programming cycle?
The AT49F512-70VU provides two hardware-confirmed methods: DATA polling (I/O7 returns complement of loaded data until completion, then true data) and toggle bit detection (I/O6 toggles between 0 and 1 during programming/erase, stops when complete). Both methods allow host firmware to poll asynchronously without fixed timing loops - reducing CPU overhead and improving update reliability across varying supply and temperature conditions.
Is the AT49F512-70VU pin-compatible with other 32-pin Flash memory devices?
No, the AT49F512-70VU is not universally pin-compatible with other 32-pin Flash memories. While it shares the 32-lead VSOP (32V) mechanical footprint with some industry-standard packages, its pin assignments - particularly NC pins at positions 29 and 30, and specific address/data mapping - differ from alternatives like SST39VF512 or AM29LV512. Direct substitution requires verification of signal routing, timing, and command set compatibility - not just physical fit.
AT49F512-70VU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.488", 12.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49F512-70VU FAQ
1.How can I place an order for AT49F512-70VU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F512-70VU 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 AT49F512-70VU reliable?
The price and inventory of AT49F512-70VU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F512-70VU is usually 5 days.
3.What payment methods are accepted for AT49F512-70VU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F512-70VU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F512-70VU?
AT49F512-70VU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F512-70VU 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 AT49F512-70VU?
For technical support, including AT49F512-70VU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F512-70VU requirements.
6.How does Aetrix verify that AT49F512-70VU is sourced from the original manufacturer or authorized distributors?
All AT49F512-70VU 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 AT49F512-70VU meets industry standards.
7.What is the process for return or replacement of AT49F512-70VU?
All AT49F512-70VU units undergo pre-shipment inspection (PSI). If there is an issue with AT49F512-70VU, 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 AT49F512-70VU part is unused and in its original packaging.
Return procedure for AT49F512-70VU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F512-70VU Tags
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