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Microchip Technology AT49F1024-55VI
- Part No.:
- AT49F1024-55VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F1024-55VI.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,202
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Product details
Overview
AT49F1024-55VI from Atmel is a 1-megabit (64K × 16) 5V-only Flash memory IC used for nonvolatile program/data storage in embedded boot code and firmware applications. It features 35 ns read access time, 10 µs typical word programming, 10,000 write/erase cycles, and an 8K-word boot block with hardware lockout. Designed for industrial temperature operation (–40°C to +85°C), it supports in-system reprogramming without high-voltage inputs.
For engineers reviewing the AT49F1024-55VI datasheet, AT49F1024-55VI pinout, AT49F1024-55VI application, or AT49F1024-55VI equivalent, key selection criteria include industrial-grade temperature tolerance, VSOP-40 package compatibility, boot-block write protection, Data Polling/Toggle Bit erase-program status detection, and 5V-only command-set simplicity for legacy 16-bit bus interfaces.
Technical Context
The AT49F1024-55VI implements a CMOS-based Flash architecture with separate main memory (56K words) and optional boot block (8K words, address 0000H–1FFFH). Its command register interface uses six-bus-cycle sequences for chip/main memory erase and boot lockout enable, with no external high-voltage supply required.
Operation modes include standard EPROM-like read (CE/OE low, WE high), word programming (four-bus-cycle sequence), and hardware data protection via VCC sense (<3.8V inhibit), noise filtering (<15 ns pulse rejection), and signal-level gating (OE low/CE high/WE high disables programming).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (64K × 16 words); supports 16-bit parallel data bus interfacing |
| Read Access Time | 55 ns max; defines minimum bus cycle timing for reliable CPU read operations |
| Word Programming Time | 10 µs typical; enables fast field firmware updates without system interruption |
| Erase Cycle Time | 10 seconds typical for full chip erase; critical for production programming throughput |
| Endurance | 10,000 program/erase cycles; ensures long-term reliability in update-intensive applications |
| Operating Temperature | –40°C to +85°C; qualified for industrial environments including factory automation and transportation systems |
| Supply Voltage | 5.0 V ±10%; eliminates need for auxiliary voltage rails or level shifters |
Pinout & Package
AT49F1024-55VI uses a 40-lead, 10 mm × 14 mm Thin Small Outline Package (VSOP), pin-compatible with AT49F1024-xxVC variants. The package is lead-free and RoHS-compliant per Atmel documentation.
| 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/O15 | Data I/O Bidirectional | 16-bit parallel data path; true bidirectional with high-impedance tri-state on deselect |
| CE | Chip Enable | Active-low device select; must be low for read/write; controls power state transitions |
| OE | Output Enable | Active-low output gate; enables data output during read; inhibits programming when low |
| WE | Write Enable | Active-low write strobe; latches address/data during programming; inhibits programming when high |
| VCC | Power Supply | +5V supply input; powers core logic and memory array; requires local decoupling |
| GND | Ground | Two dedicated ground pins (pins 18 and 30); reduce noise coupling in high-speed reads |
| NC | No Connect | Pins 7, 19, 27, 31, 39, 40 - electrically isolated; must not be connected |
Key Features
| Feature | Design Value |
|---|---|
| Single-Voltage 5V Operation | Eliminates need for 12V programming supplies; simplifies power design and PCB layout |
| Hardware Boot Block Lockout | Permanently protects 8K-word (0000H–1FFFH) region from accidental erase/program after activation |
| Data Polling & Toggle Bit | Enables real-time, software-driven detection of program/erase completion without polling timers |
| Internal Program Timer | Automatically generates precise internal programming pulses; removes external timing circuitry |
| VCC Sense Protection | Disables programming if VCC drops below 3.8V; prevents corruption during brown-out conditions |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code |
|---|---|
Use Scenario: Storing boot firmware and configuration parameters in programmable logic controllers deployed in factory-floor environments with wide temperature swings and electrical noise. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing deterministic startup execution and field-upgradable application code. Use Value: Industrial temperature rating (–40°C to +85°C) and hardware lockout ensure firmware integrity across thermal cycling and EMI exposure. | Use Scenario: Holding certified bootloader and safety-critical initialization routines in diagnostic imaging equipment requiring regulatory compliance and data retention over 10+ years. IC Role / Device Role / Timing Role: Secure, tamper-resistant boot sector memory with verified write-protection for FDA/IEC 62304 compliance. Use Value: 8K-word boot block lockout prevents unauthorized modification; 10,000-cycle endurance supports periodic calibration updates. |
| Telecom Base Station BIOS | Avionics Data Logger |
Use Scenario: Hosting BIOS and FPGA configuration bitstreams in outdoor telecom base stations exposed to extended temperature ranges and vibration. IC Role / Device Role / Timing Role: High-reliability Flash memory enabling cold-boot recovery and remote firmware patching over backhaul links. Use Value: 55 ns read access meets tight timing budgets for ARM/MIPS processors; VSOP-40 package offers mechanical stability under thermal stress. | Use Scenario: Recording flight-critical sensor metadata and event logs in airborne data acquisition units where power loss is frequent and data persistence is mandatory. IC Role / Device Role / Timing Role: Power-fail-safe nonvolatile storage with automatic write-inhibit during brown-out (VCC sense). Use Value: Hardware data protection (noise filter, VCC sense) prevents corruption during transient power events common in aircraft electrical systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AT49F1024-55VC | Same die and pinout; commercial temperature range (0°C to +70°C) only | Not rated for industrial ambient extremes; unsuitable for uncontrolled enclosures or outdoor use | Select only for cost-sensitive, temperature-stable indoor applications with no thermal margin requirements |
| SST39VF100-55-4C-NHE | 5V-only 1Mbit Flash (64K × 16); 55 ns access; PLCC-44 package; different command set and boot block size (4K) | Requires PCB redesign due to 44-pin PLCC vs. 40-pin VSOP; lacks identical 8K boot lockout algorithm | Consider only when migrating legacy PLCC designs; verify command compatibility and lockout behavior in target firmware |
Compared with AT49F1024-55VC, the AT49F1024-55VI adds industrial temperature qualification without changing timing or interface - making it a direct drop-in for harsh environments. Compared with SST39VF100-55-4C-NHE, it retains identical 8K boot lockout functionality and VSOP-40 footprint but requires no package or command-set adaptation.
Availability
AT49F1024-55VI is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and telecom infrastructure requiring stable component supply across extended temperature ranges and multi-year production lifecycles.
Supply support for AT49F1024-55VI 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 for embedded systems.
The AT49F1024 product line delivers 5V-only, in-system programmable Flash memory optimized for boot code storage and firmware updates in industrial and automotive-adjacent applications where reliability and simple command protocols are essential.
FAQ
What is the operating temperature range specified for the AT49F1024-55VI?
The AT49F1024-55VI is rated for industrial operation from –40°C to +85°C. This specification is confirmed in the Ordering Information table on page 13 of the official Atmel datasheet (Rev. 0765I–05/01), where "I" suffix denotes industrial temperature grade. The AT49F1024-55VI maintains full AC/DC parametric compliance across this range, including 55 ns read access and 10 µs word programming timing.
Does the AT49F1024-55VI require external high-voltage programming signals?
No, the AT49F1024-55VI operates exclusively at 5V for both read and reprogramming functions. As stated in the Features section, it supports "Single-voltage Operation – 5V Read – 5V Reprogramming". All programming commands (e.g., Word Program, Chip Erase, Boot Lockout) are executed using standard 5V logic levels applied to CE, OE, WE, and address/data pins - no 12V or other auxiliary voltages are needed.
How is the 8K-word boot block protected on the AT49F1024-55VI?
The AT49F1024-55VI implements hardware-based boot block lockout via a six-cycle command sequence (AAh/55h/80h/AAh/55h/40h to address 5555h). Once enabled, the 8K-word region (0000H–1FFFH) becomes permanently immune to erase and program commands. Lockout status can be verified by reading I/O0 at address 0002H in Software Product Identification mode - a logic high indicates active protection.
What package type does the AT49F1024-55VI use, and how many pins does it have?
The AT49F1024-55VI uses a 40-lead, 10 mm × 14 mm Thin Small Outline Package (VSOP), designated as "40V" in Atmel's ordering information. It has 40 physical pins arranged in two rows, with pin 1 marked by a corner chamfer. This package is distinct from the PLCC-44 used by AT49F1025 variants and is not interchangeable without PCB redesign.
Can the AT49F1024-55VI be used as a direct replacement for the AT49F1024-55VC?
Yes - the AT49F1024-55VI is pin-, package-, and functionally identical to the AT49F1024-55VC, differing only in temperature qualification (industrial vs. commercial). Both share identical DC/AC specifications, command set, boot block behavior, and VSOP-40 footprint. No PCB or firmware changes are required when upgrading from VC to VI for enhanced thermal robustness.
AT49F1024-55VI 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:
- 55 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
AT49F1024-55VI FAQ
1.How can I place an order for AT49F1024-55VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F1024-55VI 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 AT49F1024-55VI reliable?
The price and inventory of AT49F1024-55VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F1024-55VI is usually 5 days.
3.What payment methods are accepted for AT49F1024-55VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F1024-55VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F1024-55VI?
AT49F1024-55VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F1024-55VI 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 AT49F1024-55VI?
For technical support, including AT49F1024-55VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F1024-55VI requirements.
6.How does Aetrix verify that AT49F1024-55VI is sourced from the original manufacturer or authorized distributors?
All AT49F1024-55VI 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 AT49F1024-55VI meets industry standards.
7.What is the process for return or replacement of AT49F1024-55VI?
All AT49F1024-55VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F1024-55VI, 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 AT49F1024-55VI part is unused and in its original packaging.
Return procedure for AT49F1024-55VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F1024-55VI Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
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AT24C02C-SSHM-T
Microchip Technology
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24LC01BT-I/OT
Microchip Technology
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M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
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AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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