My Inquiry
My Account
Microchip Technology AT49LV1024-90VC
- Part No.:
- AT49LV1024-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49LV1024-90VC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,250
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49LV1024-90VC from Microchip Technology (formerly Atmel) is a 1-Mbit (64K × 16) single-voltage 3.0–3.6 V Flash memory IC used for nonvolatile code/data storage in embedded boot systems. It delivers 90 ns read access time, supports word-by-word programming (20 µs/word), features an 8K-word boot block with programmable lockout, and operates across 0°C to 70°C in a 40-pin VSOP package.
For engineers reviewing the AT49LV1024-90VC datasheet, AT49LV1024-90VC pinout, AT49LV1024-90VC application, or AT49LV1024-90VC equivalent, key selection considerations include boot-sector write protection, 3V-only in-system reprogrammability, fast erase (10 s chip erase), hardware data protection (VCC sense, noise filtering), and compatibility with EPROM-style bus interfacing.
Technical Context
The AT49LV1024-90VC implements a dual-block Flash architecture: a protected 8K-word boot sector (0000H–1FFFH) and a 56K-word main memory block. Erase operations are executed via command sequences - Chip Erase (six-cycle 5555H/AA → 2AAAH/55 → 5555H/80 → 5555H/AA → 2AAAH/55 → 5555H/10) or Main Memory Erase (same sequence ending in 30H).
Programming uses a four-cycle command protocol (5555H/AA → 2AAAH/55 → 5555H/A0 → address/data), with internal timing control and Data Polling (I/O7 complement) or Toggle Bit (I/O6 toggling) for cycle completion detection. Hardware protection includes VCC sense (<1.8 V inhibits programming), WE/CE/OE logic gating, and 15 ns noise immunity on control inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (64K × 16 organization) |
| Read Access Time | 90 ns - determines maximum bus clock rate for reliable read cycles |
| Supply Voltage | 3.0 V to 3.6 V - enables direct replacement of 5 V EPROMs without level shifters |
| Word Programming Time | 20 µs typical - defines minimum interval between successive word writes |
| Chip Erase Time | 10 seconds typical - sets firmware update latency for full reprogramming |
| Endurance | 10,000 program/erase cycles - specifies field lifetime under frequent updates |
| Operating Temperature | 0°C to 70°C - qualifies for commercial-grade embedded control applications |
Pinout & Package
AT49LV1024-90VC is housed in a 40-pin Very Small Outline Package (VSOP), measuring 10 mm × 14 mm, with gull-wing leads and pin 1 marked by a notch. The package is RoHS-compliant and optimized for surface-mount assembly in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus for accessing all 64K words; A0–A15 fully decoded |
| I/O0–I/O15 | Bidirectional Data Bus | 16-bit parallel interface; high-impedance when CE or OE is high |
| CE | Chip Enable | Active-low chip select; must be low for read/write; controls device activation |
| OE | Output Enable | Active-low output gate; enables data output only when CE is also low |
| WE | Write Enable | Active-low control for write/program cycles; latches address/data on rising/falling edges |
| VCC | Power Supply | 3.0–3.6 V supply; powers core logic and I/O buffers |
| GND | Ground | Two dedicated ground pins (pins 18 and 30) reduce noise coupling |
| NC | No Connect | Pins 7, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 31, 32, 33, 34, 35, 36, 37, 38, 39 - must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Single-Voltage Operation | 3.0 V read and 3.1 V programming - eliminates need for 12 V VPP, simplifying power design |
| Boot Block Lockout | 8K-word (0000H–1FFFH) region permanently protected after enable - secures bootloader against accidental overwrite |
| Data Polling & Toggle Bit | I/O7 complement and I/O6 toggling provide real-time erase/program status without polling timers - reduces firmware overhead |
| Hardware Data Protection | VCC sense, noise filtering (15 ns), and control-line gating prevent spurious writes - improves system reliability in noisy environments |
| EPROM-Compatible Interface | Standard CE/OE/WE timing and bus behavior - allows drop-in replacement of 27C010/27C020 in legacy designs |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup code and runtime parameters; accessed during cold start and firmware updates. Use Value: 8K-word boot block lockout ensures bootloader integrity across 10,000+ field updates; 90 ns access enables deterministic boot timing within 100 ms startup windows. | Use Scenario: Hosting secure boot code and calibration tables in portable diagnostic equipment requiring regulatory compliance. IC Role / Device Role / Timing Role: Trusted boot memory with tamper-resistant write protection; isolated from application data partitions. Use Value: Hardware-enforced boot lockout prevents unauthorized modification of FDA-cleared firmware; 3.0 V operation aligns with battery-powered system voltage rails. |
| Telecom Base Station BIOS | Automotive Infotainment Update Cache |
Use Scenario: Storing BIOS and FPGA configuration bitstreams in wireless infrastructure equipment operating in temperature-controlled cabinets. IC Role / Device Role / Timing Role: Primary boot image storage with fallback recovery partition; accessed during power-on reset and remote firmware upgrades. Use Value: 10-second chip erase enables rapid field updates during maintenance windows; VSOP package supports high-density PCB layouts in compact RF modules. | Use Scenario: Caching over-the-air (OTA) firmware patches before validation and installation in vehicle infotainment head units. IC Role / Device Role / Timing Role: Field-upgradable nonvolatile cache supporting A/B partitioning and rollback capability. Use Value: Word-by-word programming (20 µs) allows incremental patch application without full image reload; 3.0–3.6 V range matches automotive DC-DC converter outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF010-90-4C-NHE | 1 Mbit (64K × 16), 90 ns, 3.0–3.6 V, 32-pin TSOP - lacks boot block lockout and uses different command set | No hardware-protected boot sector; requires software-managed partitioning for bootloader safety | Select when board layout uses TSOP and boot protection is handled externally |
| MX29LV160CBTI-90G | 16 Mbit (1M × 16), 90 ns, 3.0–3.6 V, 48-pin TSOP - includes 16K-word boot block with lockout but larger density | Higher capacity suits complex firmware; pinout incompatible due to extra address/data lines and control signals | Select when future-proofing for larger code images and compatible footprint is available |
Compared with SST39VF010-90-4C-NHE and MX29LV160CBTI-90G, the AT49LV1024-90VC uniquely balances 1 Mbit density, VSOP packaging, and hardware-enforced boot lockout - making it optimal for cost-sensitive, space-constrained commercial embedded systems requiring guaranteed bootloader integrity.
Availability
AT49LV1024-90VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloader hosting, and telecom base station BIOS applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance.
Supply support for AT49LV1024-90VC 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 its Flash memory portfolio, emphasizing reliability, longevity, and industrial-grade qualification.
The AT49LV1024-90VC belongs to Atmel's legacy 3V Flash family, designed specifically for in-system reprogrammable boot memory in cost-sensitive commercial embedded systems where EPROM replacement and bootloader security are critical.
FAQ
What is the pin count and package type of the AT49LV1024-90VC?
The AT49LV1024-90VC uses a 40-pin Very Small Outline Package (VSOP) with dimensions of 10 mm × 14 mm. It features gull-wing leads, a notched corner marking pin 1, and two dedicated GND pins (pins 18 and 30) for noise reduction. This package differs from the PLCC variant (AT49LV1025) and is optimized for high-density surface-mount assembly.
Does the AT49LV1024-90VC support true 3V-only operation for both read and program functions?
Yes, the AT49LV1024-90VC operates exclusively from a 3.0–3.6 V supply: reads occur at 3.0 V, and programming requires only 3.1 V - no external high-voltage generator or VPP pin is needed. This eliminates level-shifting circuitry and simplifies power design compared to 5 V Flash or older EPROMs, making the AT49LV1024-90VC ideal for modern low-voltage embedded systems.
How does the boot block lockout feature work on the AT49LV1024-90VC?
The AT49LV1024-90VC includes an 8K-word boot block (addresses 0000H–1FFFH) that can be permanently write-protected using a six-cycle command sequence (5555H/AA → 2AAAH/55 → 5555H/80 → 5555H/AA → 2AAAH/55 → 5555H/40). Once enabled, the boot block cannot be erased or programmed - ensuring bootloader integrity. Status is readable via I/O0 during software product identification mode.
What methods does the AT49LV1024-90VC provide to detect the end of a program or erase cycle?
The AT49LV1024-90VC offers two hardware-supported detection methods: Data Polling (I/O7 returns complement of last written data until completion) and Toggle Bit (I/O6 toggles between 0 and 1 during operation, then stabilizes). Both allow firmware to poll asynchronously without fixed delays - reducing CPU overhead and improving update efficiency in real-time systems using the AT49LV1024-90VC.
Is the AT49LV1024-90VC pin-compatible with standard EPROMs like the 27C010?
No, the AT49LV1024-90VC is not pin-compatible with the 27C010 (which uses a 32-pin DIP/PLCC and 5 V supply), but it is functionally and timing-compatible: it uses identical CE/OE/WE control logic, 16-bit data bus, and EPROM-like read behavior. Board redesign is required for the 40-pin VSOP footprint and 3 V supply, yet firmware and interface logic can often be reused directly with the AT49LV1024-90VC.
AT49LV1024-90VC 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:
- 90 ns
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT49LV1024-90VC FAQ
1.How can I place an order for AT49LV1024-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV1024-90VC 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 AT49LV1024-90VC reliable?
The price and inventory of AT49LV1024-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV1024-90VC is usually 5 days.
3.What payment methods are accepted for AT49LV1024-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV1024-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV1024-90VC?
AT49LV1024-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV1024-90VC 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 AT49LV1024-90VC?
For technical support, including AT49LV1024-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV1024-90VC requirements.
6.How does Aetrix verify that AT49LV1024-90VC is sourced from the original manufacturer or authorized distributors?
All AT49LV1024-90VC 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 AT49LV1024-90VC meets industry standards.
7.What is the process for return or replacement of AT49LV1024-90VC?
All AT49LV1024-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV1024-90VC, 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 AT49LV1024-90VC part is unused and in its original packaging.
Return procedure for AT49LV1024-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49LV1024-90VC Tags
-
M24C02-WMN6TP
STMicroelectronics
-
AT24C02C-XHM-T
Microchip Technology
-
AT21CS01-STUM10-T
Microchip Technology
-
AT24C02C-SSHM-T
Microchip Technology
-
24LC01BT-I/OT
Microchip Technology
-
M24C02-FMC6TG
STMicroelectronics
-
AT24CS02-SSHM-T
Microchip Technology
-
93LC46BT-I/OT
Microchip Technology
-
AT24C04C-SSHM-T
Microchip Technology
-
24LC01BT-I/SN
Microchip Technology
-
24AA02UIDT-I/OT
Microchip Technology
-
AT24C08C-STUM-T
Microchip Technology
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
