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Microchip Technology AT49F512-70TU
- Part No.:
- AT49F512-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F512-70TU.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,154
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Product details
Overview
AT49F512-70TU from Atmel is a 5V-only, in-system programmable Flash memory IC with 512 Kbit (64K × 8) capacity, 70 ns read access time, and integrated boot block lockout for secure firmware storage. It supports byte-by-byte programming (10 µs/byte), chip erase in 10 seconds, and operates across industrial temperature range (−40°C to +85°C) in a 32-lead TSOP package.
For engineers reviewing the AT49F512-70TU datasheet, AT49F512-70TU pinout, AT49F512-70TU application, or AT49F512-70TU equivalent, key selection criteria include single-supply 5V operation, hardware data protection (VCC sense, noise filtering), DATA polling/toggle bit for program/erase completion detection, and optional Pb/halide-free green packaging.
Technical Context
The AT49F512-70TU implements a standard parallel Flash architecture with dual-line control (CE/OE) enabling flexible bus interface and contention avoidance. Its command register-based programming uses six-byte sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h) for chip erase, boot lockout enable, and product ID entry - all executed without external high-voltage sources.
It features two distinct memory regions: a 8K-byte boot block (0000H–1FFFH) with permanent write lockout capability and a main 56K-byte array. Erased bits default to logical "1"; programming sets bits to "0", requiring full-chip erase to restore "1" states. Hardware protection includes VCC sense (<3.8V inhibits programming), WE/CE/OE logic-level inhibition, and 15 ns noise filtering on control inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8), organized as 65,536 words × 8 bits - directly maps to 16-bit address bus with byte-wide data interface. |
| Read Access Time | 70 ns - determines maximum sustained read throughput (≈14.3 MB/s) and compatibility with 14 MHz bus timing. |
| Byte Programming Time | 10 µs typical - enables rapid field updates; 100 kB/s max sequential write rate without inter-byte delays. |
| Erase Cycle Time | 10 seconds max - defines minimum firmware update latency when full-chip erase is required before reprogramming. |
| End-of-Operation Detection | DATA polling (I/O7 complement) and toggle bit (I/O6 toggling) - eliminates need for fixed timing delays in host firmware. |
| Power Dissipation | 30 mA active current / 100 µA CMOS standby - supports low-power embedded systems during idle periods. |
| Endurance | 10,000 program/erase cycles - specifies field lifetime under frequent firmware revision scenarios. |
| Operating Temperature | −40°C to +85°C - qualifies for industrial control, automotive body electronics, and outdoor equipment applications. |
Pinout & Package
AT49F512-70TU is packaged in a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), compliant with JEDEC MO-142 BD. Pin 1 is marked by a beveled corner; leads are gull-wing, surface-mount compatible.
| 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 selection. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface; outputs valid during read (CE+OE low), inputs latched on WE/CE falling edge during programming. |
| CE | Chip Enable | Active-low device select; must be low for any operation; enables internal logic and power gating. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high - prevents bus contention. |
| WE | Write Enable | Active-low programming control; latches address/data on rising/falling edges per command cycle timing. |
| VCC | Power Supply | +5.0 V ±10% supply; powers core logic and I/O drivers; VCC sense circuit disables programming if below 3.8 V. |
| GND | Ground Reference | Signal and power return path; decoupling capacitor required near VCC pin for stable operation. |
| NC | No Connect | Unbonded pins (positions 13, 14, 31, 32 in TSOP); must remain unconnected per datasheet to avoid malfunction. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for dedicated programming voltage generators or level shifters - simplifies system power architecture. |
| 8K-Byte Boot Block with Lockout | Secure storage for bootloader code (0000H–1FFFH); once enabled, prevents accidental overwrite - critical for system recovery integrity. |
| Hardware Data Protection | VCC sense, OE/CE/WE logic inhibit, and 15 ns input noise filtering collectively prevent spurious writes during power transients or EMI events. |
| DATA Polling & Toggle Bit | Real-time, hardware-assisted program/erase completion signaling - removes reliance on worst-case timing margins in host firmware. |
| Pb/Halide-Free Packaging | Green (RoHS-compliant) TSOP option meets environmental regulations without performance trade-offs. |
| CMOS Standby Current ≤100 µA | Enables ultra-low-power sleep modes in battery-backed or energy-harvesting embedded systems. |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile program memory holding executable code and configuration data; accessed via parallel bus during boot and runtime updates. Use Value: 70 ns read speed ensures fast boot initialization; boot block lockout preserves critical startup routines during field firmware upgrades. | Use Scenario: Holding microcontroller firmware and calibration tables in door module ECUs subject to temperature cycling and vibration. IC Role / Device Role / Timing Role: In-system reprogrammable Flash memory interfaced to an 8/16-bit MCU; erased and rewritten over CAN diagnostics channel. Use Value: 10,000-cycle endurance supports multiple vehicle service-life software revisions; −40°C to +85°C rating ensures reliability under hood conditions. |
| Medical Diagnostic Equipment Bootloader | Networking Edge Device Configuration |
Use Scenario: Securing boot code for FDA-cleared imaging devices where unauthorized firmware modification must be physically prevented. IC Role / Device Role / Timing Role: Primary boot memory with write-protected region; hosts secure bootloader that validates subsequent application images. Use Value: Hardware-enforced boot block lockout (via 6-byte command sequence) provides tamper-resistant firmware root of trust. | Use Scenario: Storing configuration profiles, MAC addresses, and protocol stacks in industrial Ethernet switches requiring remote firmware updates. IC Role / Device Role / Timing Role: Parallel-interface Flash used for persistent storage; updated via JTAG or SPI-to-parallel bridge during maintenance windows. Use Value: 10 µs/byte programming enables sub-second configuration reloads; DATA polling allows deterministic update status reporting to network management systems. |
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, 70 ns access, 3.3V operation (not 5V-only); requires VPP = 12V for programming. | Lacks boot block lockout; uses different command set; not drop-in compatible due to voltage and timing differences. | Select only if system already uses 3.3V core logic and can accommodate high-voltage programming circuitry. |
| MX29LV512 | 512 Kbit, 70 ns, 3.0–3.6V operation; supports CFI query; no hardware boot block lockout feature. | Relies on software-defined sector protection; lacks VCC sense and noise-filtered WE/CE inputs. | Prefer for designs migrating to 3.3V platforms with CFI-based toolchain support; not suitable for legacy 5V-only systems requiring hardware lockout. |
Compared with SST39VF512 and MX29LV512, the AT49F512-70TU uniquely delivers true 5V-only operation with integrated hardware boot block lockout and robust noise immunity - making it the only choice for retrofitting or maintaining legacy 5V industrial controllers where voltage compatibility and firmware security are non-negotiable.
Availability
AT49F512-70TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive body control modules, medical diagnostic equipment bootloaders, and networking edge device configuration requiring stable component supply and long-term lifecycle support.
Supply support for AT49F512-70TU 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, Flash memory, and secure authentication ICs.
The AT49F512 belongs to Atmel's parallel Flash memory product line, designed specifically for 5V embedded systems requiring in-system reprogrammability, hardware data protection, and industrial-grade reliability.
FAQ
What is the operating voltage range for the AT49F512-70TU?
The AT49F512-70TU operates exclusively at 5.0 V ±10% (4.5 V to 5.5 V). It does not support 3.3 V or mixed-voltage operation. Its internal VCC sense circuit disables programming if supply drops below ~3.8 V, ensuring data integrity during brown-out conditions. This strict 5V requirement distinguishes the AT49F512-70TU from later-generation 3.3V Flash devices.
How does the boot block lockout feature work on the AT49F512-70TU?
The AT49F512-70TU includes an 8K-byte boot block (addresses 0000H–1FFFH) that can be permanently write-protected using a six-byte command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once enabled, no erase or program commands affect this region. The AT49F512-70TU supports software detection of lockout status via Product ID mode reading I/O0 at address 00002H.
Can the AT49F512-70TU be programmed byte-by-byte without erasing the entire chip?
No - the AT49F512-70TU requires full-chip erase before byte programming. Erasure resets all bits to logical "1"; programming then sets selected bits to "0". Since "0" bits cannot be changed back to "1" without erasure, partial updates require erasing the whole 512 Kbit array (or 56K bytes if boot block is locked). The AT49F512-70TU does not support sector or block erase - only chip-erase mode is implemented.
What methods does the AT49F512-70TU provide to detect end-of-program or end-of-erase?
The AT49F512-70TU offers two hardware-assisted detection methods: (1) DATA polling - reading the last programmed byte returns its complement on I/O7 until completion, then true data; (2) Toggle bit - I/O6 toggles between 0 and 1 during operation and stabilizes when complete. Both methods allow host firmware to poll asynchronously without fixed timing waits - a key design advantage of the AT49F512-70TU over basic EPROM-style devices.
Is the AT49F512-70TU RoHS-compliant?
Yes - the AT49F512-70TU is offered in a green (Pb/halide-free) packaging option, as confirmed in the Ordering Information section of the official datasheet (document 1027F–FLASH–3/05). The "U" suffix in AT49F512-70TU explicitly denotes the RoHS-compliant TSOP package variant, meeting EU Directive 2011/65/EU requirements without performance or reliability compromise.
AT49F512-70TU 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:
- 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-TSOP
AT49F512-70TU FAQ
1.How can I place an order for AT49F512-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F512-70TU 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 AT49F512-70TU reliable?
The price and inventory of AT49F512-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F512-70TU is usually 5 days.
3.What payment methods are accepted for AT49F512-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F512-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F512-70TU?
AT49F512-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F512-70TU 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 AT49F512-70TU?
For technical support, including AT49F512-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F512-70TU requirements.
6.How does Aetrix verify that AT49F512-70TU is sourced from the original manufacturer or authorized distributors?
All AT49F512-70TU 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 AT49F512-70TU meets industry standards.
7.What is the process for return or replacement of AT49F512-70TU?
All AT49F512-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49F512-70TU, 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 AT49F512-70TU part is unused and in its original packaging.
Return procedure for AT49F512-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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