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Microchip Technology AT49F1024A-45VL
- Part No.:
- AT49F1024A-45VL
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F1024A-45VL.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,133
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Product details
Overview
AT49F1024A-45VL 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, hardware data protection, and an 8K-word boot block with programmable lockout. It operates in commercial temperature range (0°C to 70°C) and is used for firmware storage in embedded microcontroller systems requiring in-system reprogrammability.
For engineers reviewing the AT49F1024A-45VL datasheet, AT49F1024A-45VL pinout, AT49F1024A-45VL application, or AT49F1024A-45VL equivalent, key selection criteria include 5V-only operation, VSOP-40 package compatibility, boot-sector write protection, Data Polling/Toggle Bit erase-program status detection, and 10 µs typical word programming time.
Technical Context
The AT49F1024A-45VL implements a parallel asynchronous interface with CE/OE/WE control logic enabling EPROM-like read behavior 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-chip-wide and main-memory-only-with boot block (0000H–1FFFH) protection enabled via a six-step lockout algorithm. Status detection uses I/O7 Data Polling (complement-to-data) and I/O6 Toggle Bit, both operable at any point during erase/program cycles without halting host access.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (65,536 words × 16 bits); supports 16-bit wide data bus interfacing with microcontrollers and DSPs. |
| Read Access Time | 45 ns max; enables direct execution from flash (XIP) in timing-critical boot code paths. |
| Word Programming Time | 10 µs typical; allows rapid field firmware updates without long blocking delays. |
| Erase Cycle Time | 1.5 seconds typical for full chip or main memory block; deterministic timing simplifies host firmware timeout handling. |
| End-of-Operation Detection | Data Polling on I/O7 and Toggle Bit on I/O6; eliminates need for fixed delay loops during programming/erasing. |
| Boot Block Size | 8K words (0000H–1FFFH); isolates secure bootloader code from application updates. |
| Write Endurance | 10,000 program/erase cycles; validated for repeated field firmware revisions over product lifetime. |
| Supply Voltage | 5.0 V ±10%; eliminates need for dedicated programming voltage rails or charge pumps. |
Pinout & Package
AT49F1024A-45VL is housed in a 40-lead, 10 mm × 14 mm Very Thin Small Outline Package (VSOP), Type I, lead-free compliant per ordering code suffix "L".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing; A11–A15 are don't-care in software ID mode. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access; inhibits programming when high. |
| OE | Output Enable | Active-low output control; places I/O pins in high-impedance state when high, preventing bus contention. |
| WE | Write Enable | Active-low write strobe; latches address/data on rising/falling edges per command cycle; inhibits programming when high. |
| I/O0–I/O15 | Bi-directional Data Bus | 16-bit parallel data path; I/O7 used for Data Polling, I/O6 for Toggle Bit status indication. |
| NC | No Connect | Two pins (Pin 8 and Pin 11) are unconnected; must remain floating per datasheet. |
| VCC | Power Supply | 5V ±10% supply; internal VCC sense disables programming if voltage drops below 3.8V. |
| GND | Ground | Two ground pins (Pin 16 and Pin 32) provide low-inductance return paths for read/write current transients. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for external 12V programming voltage or charge pump circuitry, reducing BOM count and board space. |
| Hardware Data Protection | VCC sense, noise filtering (<15 ns pulse rejection), and CE/OE/WE inhibit logic prevent accidental writes during power-up/down or EMI events. |
| Boot Block Lockout | Software-enabled permanent write protection for 8K-word region (0000H–1FFFH), ensuring bootloader integrity across firmware updates. |
| Data Polling & Toggle Bit | Dual, non-blocking status reporting mechanisms allow host processor to poll I/O7 or I/O6 asynchronously-no fixed wait states required. |
| VSOP-40 Compact Footprint | 10 mm × 14 mm body size enables high-density PCB layouts in space-constrained embedded modules and industrial controllers. |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader Memory |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments with frequent field updates. IC Role / Device Role / Timing Role: Nonvolatile parallel Flash memory providing XIP-capable boot code and updateable application image storage. Use Value: 45 ns read access ensures deterministic boot timing; 10,000 endurance cycles support multi-year maintenance intervals without memory replacement. | Use Scenario: Securing certified bootloader code in Class II medical instruments where regulatory compliance mandates immutable startup routines. IC Role / Device Role / Timing Role: Boot-block-protected Flash memory hosting FDA-approved initialization firmware isolated from user-updatable application partitions. Use Value: Hardware-enforced boot sector lockout prevents unauthorized modification of safety-critical startup code during service or calibration. |
| Telecom Base Station Configuration | Automotive Infotainment System Updates |
Use Scenario: Holding configuration profiles and protocol stacks in remote radio units subject to over-the-air (OTA) parameter updates. IC Role / Device Role / Timing Role: Field-reprogrammable Flash memory with main-memory-only erase capability to preserve calibration constants during partial updates. Use Value: Selective main memory erase (vs. full chip) avoids reprogramming stable calibration data stored outside boot block, reducing update time by >90%. | Use Scenario: Storing infotainment OS images and UI assets in automotive head units requiring secure, incremental firmware patches. IC Role / Device Role / Timing Role: Parallel Flash memory interfaced to ARM-based application processors for fast boot and background OTA download storage. Use Value: 10 µs word programming enables efficient patch application; Data Polling allows concurrent UI rendering while firmware writes complete. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV160DB-90EC | 3.0V–3.6V supply only; 90 ns access; 16 Mbit density; CFI-compliant command set. | Requires level-shifting for 5V systems; larger capacity suits complex GUI storage but increases cost and layout area. | Select only if migrating to 3.3V design and needing CFI standardization for multi-vendor toolchain support. |
| SST39VF1601-70-4C-EKE | 3.3V supply; 70 ns access; 16 Mbit; no boot block lockout; supports byte/word programming. | Lacks hardware boot protection; incompatible voltage domain requires redesign of power and interface logic. | Consider only for new 3.3V designs where boot security is handled externally and higher density justifies migration effort. |
Compared with AM29LV160DB-90EC and SST39VF1601-70-4C-EKE, the AT49F1024A-45VL provides native 5V operation, deterministic 45 ns timing, and integrated boot block lockout-making it optimal for legacy 5V embedded systems requiring guaranteed bootloader integrity without voltage translation or external security logic.
Availability
AT49F1024A-45VL is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader memory, telecom base station configuration, and automotive infotainment system updates requiring stable component supply across extended production lifecycles.
Supply support for AT49F1024A-45VL 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, designed high-reliability nonvolatile memory and microcontroller solutions for industrial, automotive, and communications markets.
The AT49F1024A-45VL belongs to Atmel's 5V Flash memory product line, engineered specifically for in-system reprogrammability in legacy 5V embedded systems where voltage compatibility, boot security, and predictable timing are critical.
FAQ
What is the operating temperature range for the AT49F1024A-45VL?
The AT49F1024A-45VL is rated for commercial temperature operation from 0°C to +70°C. This range is validated per its DC and AC specifications, including 45 ns read access time and 10,000 program/erase endurance. The device does not support industrial (–40°C to +85°C) or extended temperature grades-designers requiring wider thermal margins must select alternate variants or families.
Does the AT49F1024A-45VL require external high-voltage programming signals?
No, the AT49F1024A-45VL operates with single 5V supply for both read and programming functions. It uses internally generated programming voltages and command-based protocols-no external 12V or 12.5V signals are needed. Hardware protection features like VCC sense (disable below 3.8V) and noise filtering further ensure reliable 5V-only operation without risk of accidental writes.
How is boot block protection enabled on the AT49F1024A-45VL?
Boot block protection on the AT49F1024A-45VL is enabled via a six-step software algorithm: load AAh to address 555H, 55h to AAAH, 80h to 555H, then AAh/55h/40h to the same addresses with a 1-second pause before final command. Once activated, the 8K-word region (0000H–1FFFH) becomes permanently read-only-no erase or program commands affect it, and lockout status can be verified by reading I/O0 at address 0002H in product ID mode.
Can the AT49F1024A-45VL be used in a 3.3V system?
No, the AT49F1024A-45VL is strictly a 5V-only device. Its absolute maximum input voltage is 6.25V, and VIH threshold is 2.0V minimum-but DC characteristics, AC timing (e.g., 45 ns tACC), and programming functionality are specified only at VCC = 5.0V ±10%. Interfacing directly to 3.3V logic without level translation risks data corruption, failed programming, or accelerated wear due to marginal voltage margins.
What package type is used for the AT49F1024A-45VL?
The AT49F1024A-45VL uses a 40-lead Very Thin Small Outline Package (VSOP), Type I, measuring 10 mm × 14 mm. It complies with JEDEC MO-142 Variation CA and is lead-free (RoHS-compliant), indicated by the "L" suffix in the ordering code. Pin 1 is marked by a beveled corner, and the package includes two GND pins (16 and 32) and two NC pins (8 and 11).
AT49F1024A-45VL 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT49F1024A-45VL FAQ
1.How can I place an order for AT49F1024A-45VL through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F1024A-45VL 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-45VL reliable?
The price and inventory of AT49F1024A-45VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F1024A-45VL is usually 5 days.
3.What payment methods are accepted for AT49F1024A-45VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F1024A-45VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F1024A-45VL?
AT49F1024A-45VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F1024A-45VL 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-45VL?
For technical support, including AT49F1024A-45VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F1024A-45VL requirements.
6.How does Aetrix verify that AT49F1024A-45VL is sourced from the original manufacturer or authorized distributors?
All AT49F1024A-45VL 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-45VL meets industry standards.
7.What is the process for return or replacement of AT49F1024A-45VL?
All AT49F1024A-45VL units undergo pre-shipment inspection (PSI). If there is an issue with AT49F1024A-45VL, 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-45VL part is unused and in its original packaging.
Return procedure for AT49F1024A-45VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F1024A-45VL Tags
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M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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AT21CS01-STUM10-T
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24LC01BT-I/OT
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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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