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Microchip Technology AT49F512-55TI
- Part No.:
- AT49F512-55TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49F512-55TI.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,641
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Product details
Overview
AT49F512-55TI from Atmel is a 512 Kbit (64K × 8) single-voltage, in-system programmable Flash memory IC with 55 ns read access time, 5 V-only operation, 10 µs/byte programming, and an 8K-byte boot block with hardware lockout. It serves as nonvolatile program storage in embedded microcontroller systems requiring field-upgradable firmware.
For engineers reviewing the AT49F512-55TI datasheet, AT49F512-55TI pinout, AT49F512-55TI application, or AT49F512-55TI equivalent, key selection criteria include industrial temperature range (-40°C to +85°C), PLCC/TSOP/VSOP package compatibility, boot-sector write protection, DATA polling/Toggle Bit end-of-program detection, and 10,000-cycle endurance.
Technical Context
The AT49F512-55TI implements a command-register-based architecture for byte programming and chip erase using six-byte software sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h). It supports EPROM-like read timing with dual-line CE/OE control to prevent bus contention and uses internal voltage sensing (VCC ≥ 3.8 V) and noise filtering (<15 ns pulses rejected) for hardware data protection.
Its memory array is partitioned into a 56K-byte main block and an optional 8K-byte boot block (0000h–1FFFh) with permanent lockout activation via a six-command sequence. Erase and program cycles are fully self-timed, eliminating external clocks; chip erase completes in ≤10 seconds, and byte programming requires ≤50 µs typical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), enabling full firmware image storage for 8-bit MCUs |
| Read Access Time | 55 ns max - meets real-time boot code fetch timing in industrial controllers |
| Byte Programming Time | 10 µs min / 50 µs max - supports rapid field updates without system downtime |
| Chip Erase Time | ≤10 seconds - enables full reprogramming within embedded OTA update windows |
| Endurance | 10,000 program/erase cycles - suitable for devices requiring infrequent but reliable firmware revisions |
| Operating Voltage | 5 V ±10% - compatible with legacy 5 V logic rails and eliminates need for charge pumps |
| Temperature Range | -40°C to +85°C - qualified for industrial automation and automotive under-hood ECUs |
| Standby Current | 300 µA max (industrial) - reduces power in sleep-mode systems with persistent storage needs |
Pinout & Package
AT49F512-55TI is available in 32-lead TSOP (Type 1, 8 × 20 mm) per ordering code suffix "T", with standard JEDEC MO-142 BD compliance and 0.5 mm lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A0 LSB, A15 MSB |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; latched on WE/CE edges for byte programming and read |
| CE | Chip Enable | Active-low device select; must be low with OE low for read, low with WE low for program |
| OE | Output Enable | Active-low output control; high-Z when high, prevents bus contention during shared-memory access |
| WE | Write Enable | Active-low programming control; initiates command register load or byte write on falling edge |
| VCC | Power Supply | +5 V ±10% supply; powers core logic and charge pump; VCC sense disables programming if <3.8 V |
| GND | Ground Reference | Signal and power return; decoupling required near VCC pin for stable read/write margins |
| NC | No Connect | Unbonded pins (positions 15, 16, 31); must remain unconnected to avoid latch-up or ESD paths |
Key Features
| Feature | Design Value |
|---|---|
| Single 5 V Supply Operation | Eliminates need for 12 V programming voltage, simplifying power design and enabling direct MCU interface |
| 8K-Byte Boot Block with Lockout | Hardware-enforced write protection for secure bootloader code at 0000h–1FFFh, preventing accidental corruption |
| DATA Polling & Toggle Bit | Dual asynchronous methods (I/O7 complement, I/O6 toggle) to detect program/erase completion without polling timers |
| Hardware Data Protection | VCC sense, noise filtering, and multi-signal inhibit (CE/OE/WE) prevent spurious writes during power transients or EMI |
| Green (Pb/Halide-free) Packaging | RoHS-compliant TSOP option available (AT49F512-55TU), supporting environmental compliance in industrial shipments |
Applications
| Industrial PLC Firmware Storage | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers deployed in factory environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile program memory providing fast 55 ns read access for deterministic scan-cycle execution and byte-programmable field updates. Use Value: Industrial temperature rating (-40°C to +85°C) and 10,000-cycle endurance ensure long-term reliability across maintenance intervals without recalibration. | Use Scenario: Holding boot code and calibration tables in vehicle body control units subject to vibration, thermal cycling, and EMI. IC Role / Device Role / Timing Role: Secure boot memory with lockout-enabled 8K-byte sector protecting startup routines from corruption during CAN-based firmware updates. Use Value: Hardware data protection (VCC sense, noise filtering) prevents unintended writes during ignition transients or alternator ripple events. |
| Medical Diagnostic Equipment BIOS | Network Router Boot Image Storage |
Use Scenario: Storing certified boot firmware in portable ultrasound or patient monitor devices requiring regulatory traceability and fail-safe restart. IC Role / Device Role / Timing Role: Read-optimized Flash memory delivering 55 ns access for immediate post-power-on execution and supporting secure field updates via encrypted download. Use Value: DATA polling allows precise synchronization of firmware validation routines without fixed delay loops, improving boot-time predictability. | Use Scenario: Hosting primary boot image and recovery firmware in enterprise-grade routers where remote firmware rollback must be atomic and verifiable. IC Role / Device Role / Timing Role: Dual-block Flash enabling A/B partitioning: main block for active firmware, protected boot block for immutable recovery loader. Use Value: Toggle Bit (I/O6) provides robust, clockless status indication during power-constrained remote updates, reducing risk of partial writes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF512-55-4C-NHE | 512 Kbit, 55 ns, 3.3 V core (with 5 V I/O tolerance); no boot block lockout feature | Lacks hardware-protected boot sector; requires external logic or software for secure bootloader isolation | Select when migrating to lower-voltage systems and boot protection is managed at firmware level |
| MX29LV512CTTI-55G | 512 Kbit, 55 ns, 3 V supply; includes CFI-compliant command set and 4K-byte parameter sectors | CFI interface enables automatic ID and sector layout detection; no dedicated 8K boot lockout | Prefer for designs requiring standardized flash drivers and flexible sector erase granularity |
Compared with SST39VF512-55-4C-NHE and MX29LV512CTTI-55G, the AT49F512-55TI uniquely delivers 5 V-only operation with integrated hardware boot block lockout-critical for legacy 5 V systems needing tamper-resistant bootloader storage without external supervision.
Availability
AT49F512-55TI is available at Aetrix Electronics and suitable for industrial PLCs, automotive BCMs, medical diagnostic equipment, and network infrastructure requiring stable component supply across extended product lifecycles.
Supply support for AT49F512-55TI 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 for industrial, automotive, and IoT applications.
The AT49F512-55TI belongs to Atmel's legacy 5 V Flash memory product line, designed specifically for in-system programmability and robust firmware storage in cost-sensitive, temperature-stressed embedded systems.
FAQ
What is the operating temperature range for the AT49F512-55TI?
The AT49F512-55TI is rated for industrial operation from -40°C to +85°C. This range is validated per the datasheet's DC and AC operating specifications and ensures reliable read access (55 ns), byte programming (10 µs), and chip erase (≤10 s) performance across thermal extremes encountered in factory automation and transportation electronics. The AT49F512-55TI maintains CMOS standby current ≤300 µA throughout this range.
Does the AT49F512-55TI require high-voltage programming signals?
No, the AT49F512-55TI operates exclusively at 5 V for both read and programming functions. It does not require external 12 V or higher voltages. Programming is initiated via six-byte command sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h) applied to standard address/data lines, and internal circuitry generates all necessary high-voltage pulses. The AT49F512-55TI includes VCC sense logic that inhibits programming if supply drops below 3.8 V.
How is boot block protection enabled on the AT49F512-55TI?
Boot block lockout on the AT49F512-512-55TI is activated by executing a specific six-command sequence: load AAh to 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 command. Once enabled, the 8K-byte sector (0000h–1FFFh) becomes permanently unwritable and unerasable. The AT49F512-55TI supports software detection of lockout status via I/O0 read at address 00002h in product ID mode.
What package types are available for the AT49F512-55TI?
The AT49F512-55TI is packaged in a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), designated by the "T" suffix in the ordering code. This JEDEC MO-142 BD-compliant package features gull-wing leads, 0.5 mm pitch, and a 1.0 mm nominal body height. The AT49F512-55TI is not offered in PDIP or SOIC variants; alternate packages for the same speed grade include PLCC (32J) and VSOP (32V).
Can the AT49F512-55TI be used as a direct replacement for EPROMs like the 27C512?
The AT49F512-55TI is pin-compatible with the 27C512 EPROM in read mode (same A0–A15, I/O0–I/O7, CE, OE, WE, VCC, GND pinout), enabling drop-in replacement for read operations. However, programming requires different command protocols and lacks UV-erasure - the AT49F512-55TI uses electrical chip erase and byte programming. System firmware must be updated to support DATA polling or Toggle Bit status checks instead of fixed timing delays. The AT49F512-55TI retains identical 64K × 8 organization and 5 V interface.
AT49F512-55TI 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:
- 55 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
AT49F512-55TI FAQ
1.How can I place an order for AT49F512-55TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F512-55TI 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 AT49F512-55TI reliable?
The price and inventory of AT49F512-55TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F512-55TI is usually 5 days.
3.What payment methods are accepted for AT49F512-55TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F512-55TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F512-55TI?
AT49F512-55TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F512-55TI 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 AT49F512-55TI?
For technical support, including AT49F512-55TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F512-55TI requirements.
6.How does Aetrix verify that AT49F512-55TI is sourced from the original manufacturer or authorized distributors?
All AT49F512-55TI 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 AT49F512-55TI meets industry standards.
7.What is the process for return or replacement of AT49F512-55TI?
All AT49F512-55TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F512-55TI, 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 AT49F512-55TI part is unused and in its original packaging.
Return procedure for AT49F512-55TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F512-55TI Tags
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