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Microchip Technology AT49F1024A-45VC
- Part No.:
- AT49F1024A-45VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F1024A-45VC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,009
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Product details
Overview
AT49F1024A-45VC from Atmel is a 1-Mbit (64K × 16) 5V-only parallel Flash memory IC with 45 ns read access time, 10,000 program/erase cycles, and an 8K-word boot block with hardware lockout. It operates across 0°C to +70°C and draws ≤100 µA standby current, used in embedded system firmware storage and boot code retention.
For engineers reviewing the AT49F1024A-45VC datasheet, AT49F1024A-45VC pinout, AT49F1024A-45VC application, or AT49F1024A-45VC equivalent, key selection criteria include boot-block write protection, VSOP-40 package compatibility, 5V-only command interface, and Data Polling/Toggle Bit erase-program status detection.
Technical Context
The AT49F1024A-45VC implements a parallel asynchronous interface with CE/OE/WE control logic for EPROM-like read operation and command-based programming. Its internal state machine executes Chip Erase, Main Memory Erase, and Word Programming via six- or four-bus-cycle command sequences using address/data latching on WE/CE edges.
It features dual erase modes - full-chip or main-memory-only - with boot block (0000H–1FFFH) programmable lockout enabled via a 6-cycle command sequence. Status detection relies on I/O7 Data Polling complement behavior and I/O6 Toggle Bit toggling during active cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (65,536 words × 16 bits); supports 16-bit data bus interface for microcontroller boot ROM replacement. |
| Read Access Time | 45 ns max; enables direct execution from flash (XIP) in timing-critical embedded systems without wait states. |
| Programming Time | 10 µs/word typical; allows rapid field firmware updates with minimal system downtime. |
| Erase Cycle Time | 1.5 s typical chip erase; balances speed and reliability for infrequent reprogramming events. |
| Endurance | ≥10,000 program/erase cycles; ensures long-term viability in industrial control and telecom firmware applications. |
| Boot Block Size | 8K words (0000H–1FFFH); isolates secure bootloader code from accidental overwrite during main memory updates. |
| Supply Voltage | 5.0 V ±10%; eliminates need for charge pumps or external high-voltage generators during in-system programming. |
Pinout & Package
AT49F1024A-45VC uses a 40-lead, 10 mm × 14 mm Thin Small Outline Package (VSOP), Type I, JEDEC MO-142 CA compliant, with pin 1 identifier and 0.5 mm pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A11–A15 ignored during software ID mode. |
| I/O0–I/O15 | Data Inputs/Outputs | 16-bit bidirectional data bus; I/O7 used for Data Polling, I/O6 for Toggle Bit status monitoring. |
| CE | Chip Enable | Active-low chip select; must be low for read/write; high disables outputs to prevent bus contention. |
| OE | Output Enable | Active-low output control; used with CE to gate data reads; high forces outputs to high-impedance. |
| WE | Write Enable | Active-low write strobe; latches address/data on rising/falling edge depending on CE timing; inhibits programming if held high. |
| VCC | Power Supply | +5 V supply; device inhibits programming if VCC < 3.8 V (hardware protection). |
| GND | Ground | Reference for all signals; two dedicated pins ensure stable return path for high-speed switching. |
| NC | No Connect | Unbonded pins (positions 8, 11, 23); must remain unconnected per design to avoid noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Single-Voltage 5V Operation | Eliminates need for external 12V programming voltage, simplifying power design and enabling true in-system reprogramming. |
| Hardware Boot Block Lockout | Prevents accidental erasure or reprogramming of critical boot code (0000H–1FFFH) once enabled via command sequence. |
| Data Polling & Toggle Bit | Provides real-time, non-intrusive status feedback during erase/program cycles without requiring external timers or polling delays. |
| Internal Program Control | On-chip state machine handles pulse generation and timing, reducing host MCU firmware overhead during flash operations. |
| VCC Sense Protection | Automatically disables programming if supply drops below 3.8 V, preventing corruption during brown-out conditions. |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot Code |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot ROM and application code storage with guaranteed 10,000-cycle endurance under periodic field updates. Use Value: Hardware lockout prevents corruption of safety-critical startup routines during remote firmware upgrades over Modbus or EtherNet/IP. | Use Scenario: Holding boot loader and DSP firmware on carrier-grade line cards requiring hot-swap capability and zero-downtime updates. IC Role / Device Role / Timing Role: Parallel-access Flash memory interfaced directly to TI C6000 or Analog Devices SHARC processors for XIP execution. Use Value: 45 ns read access enables deterministic boot timing; Data Polling allows precise synchronization of firmware load sequences. |
| Medical Imaging System BIOS | Automotive Body Control Module |
Use Scenario: Storing diagnostic firmware and calibration tables in portable ultrasound and MRI subsystems operating within commercial temperature range. IC Role / Device Role / Timing Role: Secure, tamper-resistant boot memory with verified integrity via software product identification (001FH/0087H codes). Use Value: Boot block lockout ensures FDA-compliant bootloader remains unmodified between regulatory-certified firmware releases. | Use Scenario: Retaining vehicle-specific configuration and CAN protocol stack in body control units subject to ECU reflashing at dealerships. IC Role / Device Role / Timing Role: In-system programmable Flash used alongside Infineon XC2000 or NXP S12X microcontrollers for EEPROM-like update flexibility. Use Value: 5V-only operation matches legacy automotive power architecture; 1.5 s erase time meets OEM flash tooling cycle requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV160DB-90EC | 3.0 V core / 3.3 V I/O; 90 ns access; 16 Mbit density; no boot block lockout | Requires level-shifting for 5V systems; higher density but slower access and no hardware-protected boot region | Choose only if migrating to 3.3V platform and needing larger capacity; not drop-in compatible with AT49F1024A-45VC. |
| SST39VF1601-70-4C-EKE | 3.3 V supply; 70 ns access; 16 Mbit; Top-boot sector; no VCC sense protection | Lower power but incompatible voltage domain; lacks hardware VCC brown-out inhibition during programming | Consider for new 3.3V designs where boot sector size and voltage tolerance align; requires PCB redesign. |
Compared with AM29LV160DB-90EC and SST39VF1601-70-4C-EKE, the AT49F1024A-45VC delivers 5V-native operation, faster 45 ns read timing, and unique hardware-enforced boot block lockout-critical for legacy industrial and medical systems where voltage compatibility and code integrity are non-negotiable.
Availability
AT49F1024A-45VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom line card boot code, and medical imaging BIOS applications requiring stable component supply and long-term obsolescence management.
Supply support for AT49F1024A-45VC 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 U.S.-based semiconductor company specializing in microcontrollers, Flash memory, and secure authentication ICs.
The AT49F1024A-45VC belongs to Atmel's legacy parallel Flash memory product line, designed specifically for 5V embedded systems requiring reliable, in-system reprogrammable nonvolatile storage with hardware-level boot code protection.
FAQ
What is the operating temperature range for the AT49F1024A-45VC?
The AT49F1024A-45VC is rated for commercial temperature operation from 0°C to +70°C. This range is specified in the ordering information table and confirmed by DC/AC operating range data in the datasheet. The device's CMOS standby current remains below 100 µA across this full range, ensuring consistent low-power behavior in ambient-controlled environments like office equipment and telecom infrastructure.
Does the AT49F1024A-45VC support in-system programming without external high voltage?
Yes, the AT49F1024A-45VC supports full in-system programming using only a 5V supply-no external 12V generator is required. Its command-based architecture (e.g., 555H/AAH followed by AAAH/55H) enables erasure and word programming entirely at 5V, with hardware VCC sensing (<3.8 V) disabling writes to prevent corruption during brown-out conditions.
How is boot block protection implemented in the AT49F1024A-45VC?
The AT49F1024A-45VC implements boot block protection via a one-time, irreversible hardware lockout enabled by a specific six-cycle command sequence (555H/AAH → AAAH/55H → 555H/80H → 555H/AAH → AAAH/55H → 555H/40H). Once activated, the 8K-word region (0000H–1FFFH) becomes permanently immune to erase or program commands, preserving bootloader integrity.
What status detection methods does the AT49F1024A-45VC provide during programming?
The AT49F1024A-45VC provides two concurrent, hardware-verified status detection methods: Data Polling (I/O7 returns complement of written data until completion) and Toggle Bit (I/O6 toggles between 0/1 during active cycles). Both operate without halting the host processor and are usable at any point during erase or program operations.
What package type and dimensions does the AT49F1024A-45VC use?
The AT49F1024A-45VC uses a 40-lead Very Small Outline Package (VSOP), Type I, measuring 10 mm × 14 mm with 0.5 mm lead pitch. Per JEDEC MO-142 CA, it features a 1.00 mm nominal body height (A2), 12.40 mm nominal D1 length, and 10.00 mm nominal E width, with pin 1 marked for orientation alignment on PCB layout.
AT49F1024A-45VC 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:
- 1Mbit
- Memory Organization:
- 64K x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 45 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT49F1024A-45VC FAQ
1.How can I place an order for AT49F1024A-45VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F1024A-45VC 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 AT49F1024A-45VC reliable?
The price and inventory of AT49F1024A-45VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F1024A-45VC is usually 5 days.
3.What payment methods are accepted for AT49F1024A-45VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F1024A-45VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F1024A-45VC?
AT49F1024A-45VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F1024A-45VC 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 AT49F1024A-45VC?
For technical support, including AT49F1024A-45VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F1024A-45VC requirements.
6.How does Aetrix verify that AT49F1024A-45VC is sourced from the original manufacturer or authorized distributors?
All AT49F1024A-45VC 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 AT49F1024A-45VC meets industry standards.
7.What is the process for return or replacement of AT49F1024A-45VC?
All AT49F1024A-45VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F1024A-45VC, 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 AT49F1024A-45VC part is unused and in its original packaging.
Return procedure for AT49F1024A-45VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F1024A-45VC Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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M24C02-FMC6TG
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AT24CS02-SSHM-T
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93LC46BT-I/OT
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AT24C04C-SSHM-T
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24LC01BT-I/SN
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24AA02UIDT-I/OT
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AT24C08C-STUM-T
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