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Microchip Technology AT49F516-70VI
- Part No.:
- AT49F516-70VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F516-70VI.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,879
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Product details
Overview
AT49F516-70VI from Atmel is a 5V-only, in-system programmable Flash memory IC organized as 32,768 words × 16 bits (512 Kbit), featuring 70 ns read access time, 10 µs/word programming, and an optional 8K-word boot block with hardware lockout. It operates across –40°C to +85°C and is used in embedded firmware storage for industrial controllers requiring field-upgradable code integrity.
For engineers reviewing the AT49F516-70VI datasheet, AT49F516-70VI pinout, AT49F516-70VI application, or AT49F516-70VI equivalent, key selection criteria include boot-block write protection, VSOP/PLCC package compatibility, 5V-only operation without high-voltage programming, DATA polling/Toggle Bit erase-program status detection, and 10,000-cycle endurance.
Technical Context
The AT49F516-70VI implements a CMOS-based Flash architecture with dual-line chip enable (CE) and output enable (OE) control for bus contention prevention, and supports word-by-word programming via internal command register sequences. Its erase operations include full-chip and main-memory-only modes, both internally timed and initiated by six-cycle address/data command sequences.
Hardware data protection includes VCC sense (<3.8 V inhibits programming), noise filtering (<15 ns pulses ignored on WE/CE), and logic-level inhibit (OE low, CE high, or WE high blocks writes). Boot block lockout is activated via a deterministic six-command sequence and verified via software read at address 0002H on I/O0.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Organization | 32,768 words × 16 bits (512 Kbit); enables 16-bit parallel data interface for microcontroller bus alignment |
| Read Access Time | 70 ns max; ensures compatibility with 14 MHz CPU buses without wait states |
| Word Programming Time | 10 µs typical; allows rapid in-system firmware patching during maintenance windows |
| Erase Cycle Time | 10 seconds typical for chip or main memory erase; deterministic timing simplifies host controller timeout design |
| Endurance | 10,000 program/erase cycles; supports multi-year field updates in industrial HMI and PLC firmware |
| Operating Voltage | 5.0 V ±10%; eliminates need for dedicated programming voltage rails or charge pumps |
| Temperature Range | –40°C to +85°C; qualified for industrial-grade embedded systems without derating |
Pinout & Package
AT49F516-70VI is available in 40-lead VSOP (10 mm × 14 mm) and 44-lead PLCC packages; this variant uses the 40-lead VSOP (40V) package per ordering code suffix "VI".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A14 | Address Inputs | 15-bit address bus supporting full 32K-word addressing; A14 required for boot block (0000H–1FFFH) and main memory (2000H–7FFFH) selection |
| CE | Chip Enable | Active-low global select; must be low with OE low and WE high for valid read access; enables bus sharing with other peripherals |
| OE | Output Enable | Active-low output gate; controls tri-state of I/O0–I/O15 independently of CE to prevent bus contention during partial decode |
| WE | Write Enable | Active-low write strobe; latches address/data on rising/falling edges per AC timing specs; critical for command sequence synchronization |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; carries program data, read outputs, and command codes (e.g., AAH, 55H, 80H); I/O6 toggles during erase/program, I/O7 complements during DATA polling |
| VCC / GND | Power Supply | Single 5V supply with <100 µA standby current; decoupling required near pins 20 (VCC) and 10 (GND) per layout guidelines |
| NC | No Connect | Pins 17, 18, 39, 40 (VSOP); physically present but unconnected internally-must be left floating or tied to GND per board design rules |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 8K-word (0000H–1FFFH) region permanently protected after activation; secures bootloader code against accidental overwrite during field updates |
| DATA Polling & Toggle Bit | Real-time erase/program completion detection via I/O7 complement or I/O6 toggle-eliminates fixed delays and improves system throughput |
| Hardware Data Protection | VCC sense, noise filtering, and logic-level inhibit prevent spurious writes during power transients or EMI events without host software intervention |
| 5V-Only Command Set | All operations (read, program, erase, ID) use standard 5V logic levels-no external VPP generator or level shifters needed |
| Software Product Identification | Manufacturer code (1FH) and device code (100001XX) readable via address-controlled entry/exit-enables automatic algorithm selection in universal programmers |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments with ambient temperatures up to 85°C. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability; provides 70 ns read latency for real-time scan cycle execution and 10 µs word programming for infrequent firmware patches. Use Value: Boot block lockout prevents corruption of safety-critical startup routines during remote firmware upgrades over Modbus TCP. | Use Scenario: Holding certified bootloader code in Class II medical imaging equipment requiring regulatory-compliant firmware update traceability and tamper resistance. IC Role / Device Role / Timing Role: Secure, field-upgradable firmware repository; leverages hardware write protection and 10,000-cycle endurance to support multi-year product lifecycle compliance. Use Value: DATA polling enables deterministic update timing verification for FDA audit trails without relying on external timers or watchdogs. |
| Telecom Base Station Configuration | Automotive Infotainment Head Unit |
Use Scenario: Retaining configuration parameters and DSP calibration tables in outdoor telecom base stations exposed to wide thermal cycling (–40°C to +85°C). IC Role / Device Role / Timing Role: Parameter storage with guaranteed read reliability at temperature extremes; 70 ns access meets tight timing budgets of FPGA-based control logic. Use Value: VCC sense and noise filtering ensure zero unintended writes during brown-out conditions common in remote cell sites with unstable grid power. | Use Scenario: Hosting application firmware and UI assets in automotive head units where ECU-level firmware updates occur via CAN diagnostics channels. IC Role / Device Role / Timing Role: In-system programmable code memory interfaced to ARM Cortex-A MCU; supports background OTA updates while maintaining real-time audio playback. Use Value: Toggle Bit detection allows concurrent update progress monitoring without halting main application threads-critical for ASIL-B functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF512 | 512 Kbit (32K × 16), 70 ns access, 3.3 V operation; lacks boot block lockout and DATA polling | Requires external 3.3 V rail and host-side erase timing management; not drop-in compatible due to voltage and feature mismatch | Select only if system already uses 3.3 V core logic and can implement software-based write protection |
| MX29LV512 | 512 Kbit (32K × 16), 70 ns access, 3.0–3.6 V operation; includes CFI-compliant command set but no hardware boot lockout | Needs level-shifting for 5 V systems; boot protection requires external logic or firmware enforcement | Prefer when migrating to CFI-standard toolchains; avoid if hardware-enforced boot security is mandatory |
Compared with SST39VF512 and MX29LV512, the AT49F516-70VI uniquely delivers 5V-only operation, integrated boot block lockout, and dual-status detection (DATA polling + Toggle Bit) in a single industrial-temperature Flash device-reducing BOM count and eliminating external timing supervision.
Availability
AT49F516-70VI is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging systems, telecom base stations, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49F516-70VI 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 fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs for industrial, automotive, and consumer applications.
The AT49F516-70VI belongs to Atmel's 5V Flash memory product line, designed specifically for embedded systems requiring reliable, in-system reprogrammable code storage with hardware-enforced boot integrity and simplified 5V-only system integration.
FAQ
What is the operating temperature range for the AT49F516-70VI?
The AT49F516-70VI is rated for industrial temperature operation from –40°C to +85°C, as confirmed by its "I" suffix in the ordering code and validated in the DC and AC Operating Range table. This range ensures reliable performance in harsh environments such as factory floors, outdoor telecom enclosures, and vehicle under-hood applications where thermal stability is critical. The AT49F516-70VI maintains full specification compliance-including 70 ns read access and 10 µs programming-across this entire range without derating.
Does the AT49F516-70VI require high-voltage programming signals?
No, the AT49F516-70VI does not require high-voltage programming signals. It operates exclusively at 5.0 V ±10% for all functions-including read, program, and erase-as stated in the Features section and Absolute Maximum Ratings. Programming is controlled by standard 5V logic-level command sequences (e.g., 5555H/AAH, 2AAAH/55H), and hardware protection (VCC sense) actively inhibits writes if supply drops below ~3.8 V. This eliminates the need for external VPP generators, making the AT49F516-70VI compatible with simple 5V-only system designs.
How is boot block protection enabled and verified on the AT49F516-70VI?
Boot block protection on the AT49F516-70VI is enabled via a precise six-cycle command sequence: load AAH to 5555H, 55H to 2AAAH, 80H to 5555H, then AAH/55H/40H to the same addresses. Once activated, it is permanent and irreversible. Verification is performed in Software Product Identification mode: reading address 0002H returns low on I/O0 if unlocked, high if locked. This mechanism is documented in the Boot Block Lockout Detection section and applies identically to the AT49F516-70VI as specified in the preliminary datasheet Rev. 1089B–10/98.
What package type does the AT49F516-70VI use, and are pinouts identical between variants?
The AT49F516-70VI uses the 40-lead VSOP (Thin Small Outline Package) measuring 10 mm × 14 mm, as indicated by the "V" in "VI" and confirmed in the Ordering Information table. While the 44-lead PLCC (44J) shares identical signal functionality (A0–A14, CE, OE, WE, I/O0–I/O15), pin assignments differ significantly between VSOP and PLCC footprints-making them not pin-compatible. Layout redesign is required when switching between AT49F516-70VI (40V) and AT49F516-70JI (44J); the AT49F516-70VI pinout is fully detailed in the VSOP Top View diagram on page 1 of the datasheet.
Can the AT49F516-70VI be used in place of EPROMs like the 27C512?
Yes, the AT49F516-70VI is functionally compatible with 27C512 EPROMs in read mode-sharing the same 32K × 16 organization, 5V operation, and CE/OE/WE control interface-but adds in-system erasure and reprogramming capability without UV exposure. Unlike EPROMs, it requires no windowed package or eraser, supports 10,000 write cycles, and features hardware write protection. However, the AT49F516-70VI has different AC timing (e.g., tOE = 35 ns vs. 27C512's 25 ns) and command-based erase/program sequences, so existing EPROM programmers must be updated to support Flash-specific algorithms.
AT49F516-70VI Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 40-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:
- 40-VSOP
AT49F516-70VI FAQ
1.How can I place an order for AT49F516-70VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F516-70VI 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 AT49F516-70VI reliable?
The price and inventory of AT49F516-70VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F516-70VI is usually 5 days.
3.What payment methods are accepted for AT49F516-70VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F516-70VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F516-70VI?
AT49F516-70VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F516-70VI 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 AT49F516-70VI?
For technical support, including AT49F516-70VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F516-70VI requirements.
6.How does Aetrix verify that AT49F516-70VI is sourced from the original manufacturer or authorized distributors?
All AT49F516-70VI 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 AT49F516-70VI meets industry standards.
7.What is the process for return or replacement of AT49F516-70VI?
All AT49F516-70VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F516-70VI, 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 AT49F516-70VI part is unused and in its original packaging.
Return procedure for AT49F516-70VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F516-70VI Tags
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