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Microchip Technology AT49LV1024A-45VL
- Part No.:
- AT49LV1024A-45VL
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV1024A-45VL.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,083
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Product details
Overview
AT49LV1024A-45VL from Microchip Technology (formerly Atmel) is a 3.0V–3.6V single-supply 1-Mbit (64K × 16) 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 typical, and features an 8K-word boot block with hardware lockout for secure firmware storage.
For engineers reviewing the AT49LV1024A-45VL datasheet, AT49LV1024A-45VL pinout, AT49LV1024A-45VL application, or AT49LV1024A-45VL equivalent, key selection considerations include its VSOP-40 package, 10,000 write/erase cycles, hardware data protection (VCC sense, noise filtering), Data Polling/Toggle Bit end-of-operation detection, and boot block lockout enable algorithm requiring six specific command cycles.
Technical Context
The AT49LV1024A-45VL operates as a parallel-interface Flash memory with EPROM-compatible read behavior: data output is enabled when CE and OE are low and WE is high. Its internal command register executes erase and program operations without external high-voltage support, using only standard 3.0V–3.6V logic levels.
Erase functionality includes Chip Erase (entire array) and Main Memory Erase (56K-word region only), both internally timed and completing in ≤1.5 seconds. The optional boot block (0000H–1FFFH) supports permanent write lockout via a deterministic six-cycle command sequence, verified by software-read status at I/O0 during Product ID mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (64K × 16 words), enabling compact firmware storage for 8/16-bit microcontrollers |
| Read Access Time | 45 ns - meets timing requirements for 22 MHz bus interfaces without wait states |
| Supply Voltage | 3.0V to 3.6V - compatible with modern low-voltage logic rails and eliminates need for voltage translators |
| Programming Time | 20 µs/word typical - allows rapid field updates of small code segments without system interruption |
| Erase Cycle Time | 1.5 seconds typical - enables full reprogramming within sub-second system recovery windows |
| Endurance | 10,000 write/erase cycles - supports long-term field maintenance and firmware revision management |
| Boot Block Size | 8K words (0000H–1FFFH) - reserves dedicated space for immutable bootloader code |
Pinout & Package
AT49LV1024A-45VL uses a 40-lead Very Small Outline Package (VSOP), 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 ignored during command sequences |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; I/O7 used for Data Polling, I/O6 for Toggle Bit status indication |
| CE | Chip Enable | Active-low chip select; must be low for read/write; inhibits programming if held high |
| OE | Output Enable | Active-low output control; high-Z state prevents bus contention during standby or write |
| WE | Write Enable | Active-low write strobe; controls latching of addresses/data during program/erase commands |
| NC | No Connect | Two pins (pins 8 and 11) are unconnected; must remain floating or tied to GND per layout guidelines |
| VCC | Power Supply | 3.0V–3.6V supply; VCC sense circuitry disables programming if voltage drops below ~1.8V |
| GND | Ground | Two dedicated ground pins (pins 16 and 40) reduce noise coupling and improve signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Hardware Boot Block Lockout | Prevents accidental erasure or reprogramming of critical bootloader code after activation via six-command sequence |
| Data Polling & Toggle Bit | Enables real-time detection of program/erase completion without polling timers or external interrupts |
| VCC Sense Protection | Automatically disables write operations if supply voltage falls below safe threshold (~1.8V), preventing bit corruption |
| Noise-Filtered Control Inputs | Rejects spurious pulses <15 ns on CE/WE, eliminating false command triggering in electrically noisy environments |
| Lead-Free VSOP Packaging | RoHS-compliant 40V package with 10×14 mm footprint, optimized for high-density PCB layouts and automated assembly |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing immutable startup firmware and configuration parameters in programmable logic controllers operating in factory-floor environments with wide temperature swings and EMI. IC Role / Device Role / Timing Role: Nonvolatile boot memory providing immediate, reliable code execution upon power-up; 45 ns access ensures deterministic boot timing. Use Value: Hardware lockout prevents unauthorized modification of safety-critical initialization routines, while 10,000-cycle endurance supports decades of field calibration updates. | Use Scenario: Hosting certified bootloader code in Class II medical instruments where regulatory compliance requires tamper-proof firmware validation at power-on. IC Role / Device Role / Timing Role: Secure boot sector memory ensuring only authenticated firmware loads; parallel interface enables fast verification before application launch. Use Value: Boot block lockout guarantees bootloader integrity across device lifecycle, and Data Polling allows precise synchronization of firmware update progress without CPU overhead. |
| Telecom Base Station Configuration | Automotive Infotainment Module |
Use Scenario: Retaining network-specific configuration tables and calibration data in remote radio units exposed to thermal cycling and vibration. IC Role / Device Role / Timing Role: Field-upgradable nonvolatile memory supporting hot-swap firmware patches; 3.0V–3.6V operation aligns with telecom power architecture. Use Value: Main memory erase capability isolates configuration updates from bootloader, minimizing risk of bricking during over-the-air updates. | Use Scenario: Storing infotainment OS kernel and UI assets in automotive head units requiring AEC-Q100-compliant components (note: this part is not AEC-Q100 qualified; see Manufacturer section). IC Role / Device Role / Timing Role: Code storage memory interfaced to MCU via 16-bit parallel bus; 45 ns access supports real-time audio/video boot sequencing. Use Value: VSOP-40 package enables compact module design; 20 µs/word programming allows incremental UI asset updates during service intervals. |
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 | 45 ns access, 1 Mbit (64K × 16), 3.0V–3.6V, but uses different command set and lacks boot block lockout | Requires modified firmware driver for erase/program; no hardware-protected boot region | Select when legacy SST39VF compatibility is required and boot security is managed in software |
| MX29LV102CTXGI-45G | 45 ns access, 1 Mbit (64K × 16), 3.0V–3.6V, includes boot block but with 16K size and different lockout mechanism | Boot block spans 0000H–3FFFH; lockout is software-configurable per sector, not permanent | Select when flexible sector protection and larger boot area are needed, accepting trade-off in permanence |
Compared with SST39VF100A-45-4C-NHE and MX29LV102CTXGI-45G, the AT49LV1024A-45VL uniquely provides a permanently lockable 8K-word boot block validated by I/O0 status read, making it optimal for systems where bootloader immutability is enforced by hardware rather than software policy.
Availability
AT49LV1024A-45VL is available at Aetrix Electronics and suitable for industrial control systems, medical instrumentation, telecom infrastructure, and embedded computing applications requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for AT49LV1024A-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
Microchip Technology acquired Atmel in 2016 and maintains legacy Flash memory product lines including the AT49LV series. The company specializes in microcontrollers, analog, and nonvolatile memory solutions for industrial, automotive, and consumer markets.
The AT49LV1024A-45VL belongs to Atmel's legacy parallel Flash memory family, designed specifically for embedded systems requiring simple, robust, in-system reprogrammability without high-voltage programming circuitry - targeting cost-sensitive, space-constrained applications with moderate endurance needs.
FAQ
What is the operating voltage range for the AT49LV1024A-45VL?
The AT49LV1024A-45VL operates from 3.0V to 3.6V DC. It does not support 2.7V operation (unlike the BV variant). This 3.0V–3.6V range ensures compatibility with modern low-power logic families and eliminates the need for level-shifting circuitry. The device includes VCC sense circuitry that disables programming if supply voltage drops below approximately 1.8V, preventing data corruption during brown-out conditions. AT49LV1024A-45VL is specified for commercial temperature range (0°C to +70°C).
How does the boot block lockout feature work on the AT49LV1024A-45VL?
The AT49LV1024A-45VL includes an 8K-word boot block (addresses 0000H–1FFFH) that can be permanently protected from erasure or programming using a six-cycle command sequence: load AAh to 555H, 55h to AAAH, 80h to 555H, then AAh/55h/40h to 555H/AAAH/555H. Once enabled, the lockout is irreversible and verified by reading I/O0 = high during Software Product Identification mode. AT49LV1024A-45VL retains full programmability of the main 56K-word memory region even with boot lockout active.
Can the AT49LV1024A-45VL be used as a direct replacement for the AT49BV1024A-45VC?
No, the AT49LV1024A-45VL is not a direct replacement for the AT49BV1024A-45VC due to differing voltage ranges: the BV variant operates from 2.7V to 3.6V, while the LV variant requires 3.0V to 3.6V minimum. Although pinout, timing, and command sets are identical, systems powered below 3.0V will fail to program or read correctly with AT49LV1024A-45VL. AT49LV1024A-45VL is functionally identical to AT49LV1024A-45VC except for the lead-free VSOP packaging.
What methods does the AT49LV1024A-45VL provide to detect completion of program or erase operations?
The AT49LV1024A-45VL offers two hardware-based detection methods: Data Polling (monitoring complemented data on I/O7 during programming or erased state on I/O7 during erase) and Toggle Bit (observing toggling on I/O6 until operation completes). Both methods allow the host system to poll status without fixed delay loops. AT49LV1024A-45VL supports detection at any point during the operation - no minimum wait time is required before initiating polling.
Is the AT49LV1024A-45VL qualified for automotive applications?
No, the AT49LV1024A-45VL is specified only for commercial temperature range (0°C to +70°C) and is not AEC-Q100 qualified. Microchip's official documentation states Atmel products "are not suitable for, and shall not be used in, automotive applications." For automotive use, designers must select AEC-Q100 qualified alternatives such as the SST39VF100A-45-4I-NHE or MX29GL128FHI-45G. AT49LV1024A-45VL remains appropriate for industrial, medical, and telecom equipment operating within its rated temperature envelope.
AT49LV1024A-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:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT49LV1024A-45VL FAQ
1.How can I place an order for AT49LV1024A-45VL through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV1024A-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 AT49LV1024A-45VL reliable?
The price and inventory of AT49LV1024A-45VL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV1024A-45VL is usually 5 days.
3.What payment methods are accepted for AT49LV1024A-45VL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV1024A-45VL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV1024A-45VL?
AT49LV1024A-45VL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV1024A-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 AT49LV1024A-45VL?
For technical support, including AT49LV1024A-45VL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV1024A-45VL requirements.
6.How does Aetrix verify that AT49LV1024A-45VL is sourced from the original manufacturer or authorized distributors?
All AT49LV1024A-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 AT49LV1024A-45VL meets industry standards.
7.What is the process for return or replacement of AT49LV1024A-45VL?
All AT49LV1024A-45VL units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV1024A-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 AT49LV1024A-45VL part is unused and in its original packaging.
Return procedure for AT49LV1024A-45VL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV1024A-45VL Tags
-
M24C02-WMN6TP
STMicroelectronics
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AT24C02C-XHM-T
Microchip Technology
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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
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24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
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