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Microchip Technology AT49LV1024A-45VC
- Part No.:
- AT49LV1024A-45VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV1024A-45VC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,099
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Product details
Overview
AT49LV1024A-45VC from Microchip (formerly Atmel) is a 1-Mbit (64K × 16) 3.0–3.6V single-voltage Flash memory IC used for nonvolatile code and data storage in embedded boot applications. It delivers 45 ns read access time, supports word-by-word programming at 20 µs/word, and features an 8K-word boot block with hardware lockout for secure firmware storage.
For engineers reviewing the AT49LV1024A-45VC datasheet, AT49LV1024A-45VC pinout, AT49LV1024A-45VC application, or AT49LV1024A-45VC equivalent, key selection considerations include its VSOP-40 package, boot-sector write protection, Data Polling/Toggle Bit end-of-cycle detection, and compatibility with EPROM-style bus interfacing in microcontroller-based systems.
Technical Context
The AT49LV1024A-45VC implements a parallel interface with CE/OE/WE control logic enabling EPROM-compatible read operation and command-based erase/program sequences. Its internal state machine handles chip erase (1.5 s), main memory erase, and word programming without external high-voltage support.
It integrates hardware data protection including VCC sense (<1.8V inhibit), noise filtering on WE/CE (≤15 ns pulse rejection), and dual-line bus control to prevent contention. The boot block (0000H–1FFFH) is programmable only before lockout activation, after which it becomes permanently write-protected while main memory remains field-updatable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (64K × 16 words), sufficient for compact boot code and configuration data in resource-constrained systems |
| Read Access Time | 45 ns - enables direct execution from flash (XIP) in 20–25 MHz microcontroller buses |
| Supply Voltage | 3.0 V to 3.6 V - compatible with modern 3.3V logic domains without level-shifting |
| Word Programming Time | 20 µs typical - allows rapid field updates of small firmware patches or parameter sets |
| Erase Cycle Time | 1.5 s typical for full chip erase - balances speed and endurance for infrequent reprogramming |
| Endurance | 10,000 program/erase cycles - validated for long-term deployment in industrial control and networking equipment |
| Operating Temperature | 0°C to +70°C - rated for commercial-grade embedded applications with passive cooling |
| Package | 40-pin VSOP (10 mm × 14 mm) - low-profile surface-mount footprint for space-constrained PCB layouts |
Pinout & Package
AT49LV1024A-45VC uses a 40-pin Very Small Outline Package (VSOP), Type 1, measuring 10 mm × 14 mm with 0.5 mm lead pitch and JEDEC MO-142 CA compliance. Pin 1 is marked by a beveled corner.
| 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 during software ID mode |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel data path; 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-Z output when asserted high |
| OE | Output Enable | Active-low output control; used with CE to manage bus contention and enable EPROM-style reads |
| WE | Write Enable | Active-low write strobe; initiates command latching and internal programming/erase timing sequences |
| NC | No Connect | Two pins (Pin 8 and Pin 11) are unconnected; must remain floating per datasheet |
| VCC | Power Supply | 3.0–3.6V core supply; internal VCC sense disables programming if voltage drops below ~1.8V |
| GND | Ground | Two dedicated ground pins (Pins 16 and 40) reduce noise coupling during high-speed read/write transitions |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Lockout | 8K-word (0000H–1FFFH) region permanently protected after activation - ensures bootloader integrity across firmware updates |
| Data Polling & Toggle Bit | Dual asynchronous end-of-program/erase detection via I/O7 complement or I/O6 toggling - eliminates need for fixed delay timers in host firmware |
| Hardware Write Protection | VCC sense, noise filtering, and CE/OE/WE logic interlock prevent accidental writes - critical for reliability in noisy industrial environments |
| EPROM-Compatible Interface | Standard parallel bus timing with CE/OE/WE control - simplifies migration from EPROMs and reduces host driver development effort |
| Lead-Free Packaging | RoHS-compliant VSOP option available (AT49LV1024A-45VL) - supports environmental compliance without redesign |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing immutable bootloader and safety-critical initialization routines in programmable logic controllers with field-update capability. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing XIP-capable 45 ns read access and secure 8K-word protected region. Use Value: Prevents corruption of startup code during power interruption or EMI events via hardware lockout and VCC-sense programming inhibition. | Use Scenario: Holding certified boot firmware in FDA-regulated diagnostic instruments requiring traceable, tamper-resistant storage. IC Role / Device Role / Timing Role: Secure boot memory with permanent write-protection for bootloader section and 10,000-cycle endurance for parameter updates. Use Value: Enables regulatory compliance through deterministic boot code integrity verified via software product ID (001FH/0087H) and lockout status polling. |
| Networking Equipment Configuration | Automotive Infotainment Module |
Use Scenario: Storing MAC addresses, calibration tables, and firmware patches in Ethernet switches and routers with remote update capability. IC Role / Device Role / Timing Role: Field-upgradable parallel Flash memory supporting main-memory-only erase to preserve boot code during partial updates. Use Value: Reduces downtime via 1.5-second chip erase and 20 µs/word programming - enables fast over-the-network configuration recovery. | Use Scenario: Hosting boot code and UI assets in automotive head units where thermal cycling and vibration demand high-reliability nonvolatile storage. IC Role / Device Role / Timing Role: Commercial-temperature (0°C to +70°C) Flash memory with robust noise filtering and 10,000-cycle endurance for infotainment lifecycle. Use Value: Ensures consistent startup behavior across temperature extremes using hardware data protection and stable 45 ns access timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF100A-45-4C-NHE | Same density (1 Mbit × 16), 45 ns access, but uses 3.3V ±10% supply (3.0–3.6V); lacks boot-block lockout feature | No hardware-protected boot sector - requires external MCU-level protection for bootloader security | Select when boot-sector write protection is not required and SST's faster 10 µs word programming is beneficial |
| MX29LV102CTTI-45G | 1 Mbit × 16, 45 ns, 3.0–3.6V, includes boot-block protection but with different command set and 2.5 s typical erase time | Requires modified host firmware for command sequence compatibility; same 8K boot size but different address mapping (0000H–1FFFH) | Choose for drop-in replacement where existing design already uses Macronix command protocol and tolerates longer erase latency |
Compared with SST39VF100A-45-4C-NHE and MX29LV102CTTI-45G, the AT49LV1024A-45VC uniquely combines factory-verified 10,000-cycle endurance, integrated VCC-sense write inhibition, and a standardized 6-cycle boot-lock algorithm - making it optimal for safety-aware embedded systems where firmware integrity is non-negotiable.
Availability
AT49LV1024A-45VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader implementation, and networking equipment configuration management requiring stable component supply across multi-year production cycles.
Supply support for AT49LV1024A-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
Microchip Technology acquired Atmel in 2016 and maintains full support for legacy Atmel Flash memory products including the AT49LV1024A-45VC.
This device belongs to Atmel's parallel-interface 3V Flash memory family, designed specifically for reliable, in-system reprogrammable boot code storage in cost-sensitive commercial embedded systems.
FAQ
What is the exact memory organization of the AT49LV1024A-45VC?
The AT49LV1024A-45VC contains 1 megabit of Flash memory organized as 65,536 words × 16 bits (64K × 16). This equates to 131,072 bytes total capacity, with the boot block occupying the lower 8K words (0000H–1FFFH) and the main memory occupying the remaining 56K words (2000H–FFFFH). The AT49LV1024A-45VC uses standard parallel addressing and data bus signaling compatible with microcontroller memory interfaces.
Does the AT49LV1024A-45VC require external high-voltage programming signals?
No, the AT49LV1024A-45VC operates exclusively from a single 3.0–3.6V supply and does not require external high-voltage programming signals. All erase and program operations are initiated via standard 3V-level command sequences written to specific address/data locations (e.g., 555H/AAH, AAH/55H). Internal circuitry generates necessary programming pulses, making the AT49LV1024A-45VC suitable for in-system reprogramming without specialized programmers.
How is boot block protection enabled on the AT49LV1024A-45VC?
Boot block protection on the AT49LV1024A-45VC is enabled by executing a precise six-cycle command sequence: write AAH to address 555H, 55H to AAAH, 80H to 555H, AAH to 555H, 55H to AAAH, then 40H to 555H - with a 1-second pause before the final step. Once activated, the 8K-word boot block (0000H–1FFFH) becomes permanently read-only. The AT49LV1024A-45VC supports software detection of lockout status via I/O0 at address 0002H in product ID mode.
What methods does the AT49LV1024A-45VC provide to detect completion of programming or erase operations?
The AT49LV1024A-45VC provides two hardware-supported methods: Data Polling (monitoring complemented data on I/O7 during programming) and Toggle Bit (observing toggling on I/O6 during active cycles). Both operate asynchronously and can be polled at any time - eliminating fixed-timing delays in host firmware. These mechanisms are fully implemented within the AT49LV1024A-45VC silicon and require no external components.
Is the AT49LV1024A-45VC pin-compatible with other members of the AT49BV/LV1024A family?
Yes, the AT49LV1024A-45VC shares identical pinout, package (VSOP-40), and command set with AT49BV1024A-45JC and AT49LV1024A-45JI variants. Differences are limited to operating voltage range (BV = 2.7–3.6V, LV = 3.0–3.6V) and temperature grade (commercial vs. industrial). The AT49LV1024A-45VC maintains full functional and mechanical compatibility across this family for drop-in substitution where voltage and temperature requirements align.
AT49LV1024A-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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT49LV1024A-45VC FAQ
1.How can I place an order for AT49LV1024A-45VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV1024A-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 AT49LV1024A-45VC reliable?
The price and inventory of AT49LV1024A-45VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV1024A-45VC is usually 5 days.
3.What payment methods are accepted for AT49LV1024A-45VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV1024A-45VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV1024A-45VC?
AT49LV1024A-45VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV1024A-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 AT49LV1024A-45VC?
For technical support, including AT49LV1024A-45VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV1024A-45VC requirements.
6.How does Aetrix verify that AT49LV1024A-45VC is sourced from the original manufacturer or authorized distributors?
All AT49LV1024A-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 AT49LV1024A-45VC meets industry standards.
7.What is the process for return or replacement of AT49LV1024A-45VC?
All AT49LV1024A-45VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV1024A-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 AT49LV1024A-45VC part is unused and in its original packaging.
Return procedure for AT49LV1024A-45VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV1024A-45VC Tags
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