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Microchip Technology AT49LV001-90TC
- Part No.:
- AT49LV001-90TC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49LV001-90TC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
AT49LV001-90TC from Atmel is a 1 Mbit (128K × 8) single-supply 3.0–3.6 V Flash memory IC with 90 ns read access time, sector-based architecture (16 KB boot block + two 8 KB parameter blocks + two main memory blocks), and hardware data protection. It supports in-system reprogramming via standard CE/OE/WE control and is used in embedded firmware storage for industrial controllers and legacy microcontroller boot code retention.
For engineers reviewing the AT49LV001-90TC datasheet, AT49LV001-90TC pinout, AT49LV001-90TC application, or AT49LV001-90TC equivalent, key selection considerations include its 3.0–3.6 V operation range, TSOP-32 package, boot block programming lockout feature, byte-programmable timing (30 µs typical), and compatibility with EPROM-style bus interfaces in space-constrained designs.
Technical Context
The AT49LV001-90TC implements a sector-erasable Flash architecture with dedicated 16 KB boot block (address range 1C000H–1FFFFH), two 8 KB parameter blocks, and two main memory blocks (32 KB and 64 KB). Its command-set-driven operation uses six-byte sequences for chip/sector erase and four-byte sequences for byte programming, all executed using standard microprocessor write timing without external clocks.
Hardware protection includes VCC sense (<1.8 V inhibits programming), noise filtering (<15 ns pulses ignored on WE/CE), and dual-line control (CE/OE) to prevent bus contention. DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) provide real-time program/erase cycle status detection independent of system timing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 1 Mbit (131,072 × 8), organized as 128K words × 8 bits - directly replaces 27C010 EPROMs in 8-bit bus systems. |
| Read Access Time | 90 ns max - ensures compatibility with 11 MHz Z80 or 8051-based systems requiring fast instruction fetch from nonvolatile memory. |
| Supply Voltage | 3.0 V to 3.6 V - enables direct integration into 3.3 V logic domains without level-shifting or charge pumps. |
| Byte Programming Time | 30 µs typical - supports field firmware updates at ~33 kB/s sustained rate under optimal conditions. |
| Erase Cycle Time | 10 seconds max for full chip - allows predictable maintenance windows during in-system reprogramming. |
| Endurance | 10,000 program/erase cycles - validated for applications requiring infrequent but reliable firmware revision (e.g., industrial HMI configuration storage). |
| Standby Current | 50 µA CMOS - suitable for battery-backed systems where low quiescent power is critical between update events. |
Pinout & Package
AT49LV001-90TC is packaged in a 32-lead Plastic Thin Small Outline Package (TSOP, 8 × 20 mm, Type 1), pin-compatible with industry-standard 32-pin Flash memory footprints. Pin 1 is located at the bottom-left corner (marking dot adjacent), with pin 17 as VCC and pin 16 as GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus supporting full 128K-word addressing; A16 selects upper/lower half of memory map. |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface compatible with 8080/Z80/68K-style microprocessor data buses; high-impedance when deselected. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access - prevents bus contention in multi-device systems. |
| OE | Output Enable | Active-low output control; used with CE to gate data output - enables shared-bus arbitration without external logic. |
| WE | Write Enable | Active-low write strobe; latches address/data on falling/rising edges per command sequence - defines timing for all programming/erase operations. |
| RESET* | Reset Input | Active-low reset; halts ongoing program/erase and forces high-Z outputs - also accepts 12 V override to unlock boot block when lockout is enabled. |
| VCC | Power Supply | +3.0 V to +3.6 V supply; internally regulated for stable core voltage during programming - no external VPP required. |
| GND | Ground | Signal reference plane; decoupling capacitor (0.1 µF) required within 10 mm of pin 16 for noise immunity during fast transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Architecture with Boot Block Lockout | 16 KB boot sector (1C000H–1FFFFH) can be permanently write-protected via command sequence - secures bootloader code against accidental overwrite during field firmware updates. |
| Hardware Data Protection | VCC sense, noise filtering, and CE/OE/WE interlock prevent spurious writes - eliminates need for external write-protection circuitry in noisy industrial environments. |
| DATA Polling & Toggle Bit | I/O7 complement and I/O6 toggle provide asynchronous, timing-independent confirmation of program/erase completion - removes dependency on fixed delay loops in host firmware. |
| Single 3.0–3.6 V Supply | No VPP or charge pump required - simplifies power design and reduces BOM count versus 5 V Flash or EPROM alternatives. |
| TSOP-32 Footprint | 8 × 20 mm surface-mount package - enables high-density PCB layouts in space-constrained embedded modules and legacy upgrade paths. |
Applications
| Industrial PLC Firmware Storage | Legacy Microcontroller Bootloader |
|---|---|
|
Use Scenario: Storing firmware images 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 program memory mapped to CPU address space; accessed via synchronous 8-bit bus with 90 ns timing compliance. Use Value: Sector erase capability allows selective reprogramming of application logic while preserving boot code; 50 µA standby current extends uptime in battery-buffered backup modes. |
Use Scenario: Hosting secure startup code for 8051- or Z80-based embedded systems where bootloader integrity must survive repeated field updates. IC Role / Device Role / Timing Role: Boot memory device with hardware-enforced write protection on 16 KB boot block; accessed during cold reset before RAM initialization. Use Value: Boot block lockout prevents corruption of critical initialization routines; 12 V RESET override enables controlled recovery if lockout is prematurely activated. |
| Medical Device Configuration Memory | Telecom Line Card Parameter Storage |
|
Use Scenario: Retaining calibration data, user preferences, and safety-critical settings in Class II medical instruments requiring long-term data retention and audit trails. IC Role / Device Role / Timing Role: EEPROM-replacement storage with deterministic 10,000-cycle endurance and sector-level erase granularity for parameter partitioning. Use Value: Hardware data protection ensures immunity to power glitches during write; 3.3 V compatibility avoids level-shifting in modern low-voltage analog front-ends. |
Use Scenario: Storing protocol stacks, line provisioning tables, and fault logs in carrier-grade DSLAM or TDM line cards deployed in central offices. IC Role / Device Role / Timing Role: Field-upgradable firmware repository supporting hot-swap maintenance; accessed over shared backplane bus with strict timing margins. Use Value: 90 ns read access meets tight timing budgets of telecom control processors; TSOP-32 package enables high board density in multi-slot chassis designs. |
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, 3.0–3.6 V, 90 ns, PLCC-32 only - lacks RESET pin and boot block lockout override (no 12 V unlock) | Requires external reset management; unsuitable where boot code recovery via RESET voltage override is mandated by safety standards | Select if PLCC-32 footprint is fixed and boot block override is not required; verify absence of RESET-dependent recovery workflows |
| MX29LV001CTTI-90G | 1 Mbit, 3.0–3.6 V, 90 ns, TSOP-32 - supports CFI query but has different command set and no hardware boot lockout | Relies on software-managed protection; requires firmware changes to implement equivalent boot security model | Select for CFI-compliant toolchains; avoid if existing host code depends on Atmel-specific lockout commands or 12 V RESET override |
Compared with SST39VF010-90-4C-NHE and MX29LV001CTTI-90G, the AT49LV001-90TC provides unique hardware-enforced boot block protection with voltage-override recovery - a critical differentiator for safety-certified embedded systems requiring guaranteed bootloader integrity across firmware lifecycle updates.
Availability
AT49LV001-90TC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, legacy microcontroller bootloader retention, and medical device configuration memory requiring stable component supply and long-term obsolescence support.
Supply support for AT49LV001-90TC 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 industrial, automotive, and consumer applications.
The AT49LV001-90TC belongs to Atmel's Battery-Voltage™ Flash memory product line, designed specifically for 3.3 V systems requiring in-system reprogrammability, sector-level erase flexibility, and hardware-based data integrity features in resource-constrained embedded platforms.
FAQ
What is the operating voltage range for the AT49LV001-90TC?
The AT49LV001-90TC operates from 3.0 V to 3.6 V DC. This single-supply range eliminates the need for separate VPP programming voltage, enabling direct integration into 3.3 V logic systems. Operation below 3.0 V is inhibited by internal VCC sense circuitry to prevent unreliable programming - a safeguard confirmed in the Absolute Maximum Ratings and DC Characteristics sections of the datasheet. The AT49LV001-90TC does not support 5 V operation.
Does the AT49LV001-90TC support boot block write protection, and how is it enabled?
Yes, the AT49LV001-90TC includes a hardware-programmable boot block lockout feature for its 16 KB boot sector (1C000H–1FFFFH). It is enabled by executing a six-byte command sequence (AAh, 55h, 80h, AAh, 55h, 40h) to address 5555h. Once activated, the boot block cannot be erased or programmed with ≤5.5 V inputs. The AT49LV001-90TC also supports 12 V applied to the RESET pin to temporarily override this lockout during recovery procedures.
What package type is used for the AT49LV001-90TC, and what are its key mechanical dimensions?
The AT49LV001-90TC uses a 32-lead Plastic Thin Small Outline Package (TSOP, Type 1), specified as 8 mm × 20 mm body size with 0.5 mm lead pitch. Pin 1 is marked by a dot or notch at the bottom-left corner. This TSOP-32 footprint matches JEDEC MO-153 standards and is pin-compatible with other 32-pin Flash memories in the same family, enabling drop-in replacement in existing layouts designed for similar density devices.
How does the AT49LV001-90TC indicate completion of a byte programming cycle?
The AT49LV001-90TC provides two hardware methods: DATA polling and Toggle Bit detection. During programming, reading the last written byte returns the complement of the loaded data on I/O7 until completion; then true data appears. Alternatively, I/O6 toggles between 0 and 1 during active programming and stops toggling once complete. Both methods are asynchronous and require no fixed timing delays - a key advantage over timer-based polling in real-time embedded systems using the AT49LV001-90TC.
Is the AT49LV001-90TC compatible with standard EPROM socket adapters or programmers?
No, the AT49LV001-90TC is not pin-compatible with standard EPROMs like the 27C010 due to differences in control signal mapping (e.g., dedicated RESET pin, no VPP, and command-set-driven programming). While it emulates EPROM read behavior electrically, programming requires a Flash-aware programmer that supports Atmel's specific command sequences and 3.3 V-only operation. Direct substitution into EPROM sockets without adapter logic or voltage translation will not function correctly for write/erase operations.
AT49LV001-90TC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-TFSOP (0.724", 18.40mm Width)
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- FLASH
- Technology:
- FLASH
- Memory Size:
- 1Mbit
- Memory Organization:
- 128K x 8
- 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:
- 32-TSOP
AT49LV001-90TC FAQ
1.How can I place an order for AT49LV001-90TC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49LV001-90TC 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 AT49LV001-90TC reliable?
The price and inventory of AT49LV001-90TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49LV001-90TC is usually 5 days.
3.What payment methods are accepted for AT49LV001-90TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49LV001-90TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49LV001-90TC?
AT49LV001-90TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49LV001-90TC 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 AT49LV001-90TC?
For technical support, including AT49LV001-90TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49LV001-90TC requirements.
6.How does Aetrix verify that AT49LV001-90TC is sourced from the original manufacturer or authorized distributors?
All AT49LV001-90TC 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 AT49LV001-90TC meets industry standards.
7.What is the process for return or replacement of AT49LV001-90TC?
All AT49LV001-90TC units undergo pre-shipment inspection (PSI). If there is an issue with AT49LV001-90TC, 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 AT49LV001-90TC part is unused and in its original packaging.
Return procedure for AT49LV001-90TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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