My Inquiry
My Account
Microchip Technology AT49F512-90VC
- Part No.:
- AT49F512-90VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F512-90VC.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,090
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49F512-90VC from Atmel is a 512 Kbit (64K × 8) single-supply 5V-only CMOS Flash memory IC used for nonvolatile code and data storage in embedded microcontroller systems. It features 50 ns read access time, 10 µs/byte programming, 10-second chip erase, hardware data protection, and an 8K-byte boot block with programmable lockout. It operates across the commercial temperature range (0°C to 70°C) in a 32-lead VSOP package.
For engineers reviewing the AT49F512-90VC datasheet, AT49F512-90VC pinout, AT49F512-90VC application, or AT49F512-90VC equivalent, key selection considerations include its 5V-only operation, boot-block write lockout capability, DATA polling and toggle-bit program/erase status detection, and compatibility with standard EPROM read interfaces.
Technical Context
The AT49F512-90VC implements a command-register-based architecture for byte programming and chip erase, using six-byte software command sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/10h). It supports both hardware and software product identification modes to verify manufacturer (1Fh) and device (03h) codes.
Its dual-line control logic (CE/OE active-low, WE active-low) enables bus contention avoidance during read operations, while VCC sense (<3.8 V inhibit), noise filtering (<15 ns pulse rejection), and OE/CE/WE state monitoring provide robust hardware data protection against inadvertent writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 512 Kbit (64K × 8), enabling storage of firmware images up to 64 KB in size |
| Read Access Time | 90 ns max - defines maximum latency between address valid and stable output data |
| Byte Programming Time | 10 µs typical - determines minimum time per byte during in-system reprogramming |
| Chip Erase Time | 10 seconds max - sets worst-case downtime during full-memory update cycles |
| Active Current | 30 mA max at 5 MHz - impacts power budgeting in active read mode |
| Standby Current | 100 µA max (CMOS) - enables low-power retention in sleep states |
| Endurance | 10,000 program/erase cycles - specifies usable lifetime under repeated field updates |
| Boot Block Size | 8 KB (0000h–1FFFh) - reserves protected region for secure bootloader code |
Pinout & Package
AT49F512-90VC is housed in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, with gull-wing leads and JEDEC-standard pinout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing space |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface compatible with standard microprocessor data buses |
| CE | Chip Enable | Active-low global enable; must be low for read/write access and high for standby |
| OE | Output Enable | Active-low control for output drivers; used with CE to prevent bus contention |
| WE | Write Enable | Active-low signal initiating internal program/erase command execution |
| VCC | Power Supply | 5.0 V ±10% supply; powers all internal logic and memory array |
| GND | Ground Reference | Signal and power return path; required for proper voltage referencing |
| NC | No Connect | Unbonded pins (positions 1, 2, 31, 32 in VSOP); must remain unconnected |
Key Features
| Feature | Design Value |
|---|---|
| 5V-only operation | Eliminates need for external +12 V programming supply, simplifying system power design |
| DATA polling & toggle-bit status | Enables real-time, hardware-agnostic detection of program/erase completion without timer overhead |
| 8K-byte boot block with lockout | Allows permanent protection of bootloader code while permitting updates to application firmware |
| Hardware data protection | Combines VCC sensing, input noise filtering, and multi-signal inhibit logic to prevent spurious writes |
| Standard EPROM read interface | Ensures drop-in replacement compatibility with existing EPROM-based designs and programmers |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Bootloader Memory |
|---|---|
Use Scenario: Storing firmware for programmable logic controllers requiring field-upgradable logic programs and configuration data. IC Role / Device Role / Timing Role: Nonvolatile code storage with in-system reprogrammability and boot-sector protection against corruption during remote updates. Use Value: Enables secure over-the-air updates of control logic while preserving validated startup routines in the locked 8K boot block. | Use Scenario: Hosting bootloader code in engine control units where firmware integrity is critical for emissions compliance and safety. IC Role / Device Role / Timing Role: Secure, tamper-resistant storage for certified bootloader binaries that initialize flash programming and diagnostic functions. Use Value: Prevents accidental or malicious overwrite of bootloader via the boot block lockout feature, ensuring deterministic system startup. |
| Medical Device Configuration Memory | Networking Equipment Boot Image Storage |
Use Scenario: Retaining calibrated sensor parameters and regulatory-compliant operational profiles in portable diagnostic instruments. IC Role / Device Role / Timing Role: Reliable, long-life nonvolatile memory for configuration data subject to periodic recalibration and audit trails. Use Value: 10,000-cycle endurance and 100 µA standby current support battery-powered operation and regulatory data retention requirements. | Use Scenario: Storing primary boot images for Ethernet switches and routers requiring fail-safe recovery after firmware corruption. IC Role / Device Role / Timing Role: Dual-role memory holding both recoverable bootloader and updatable application image in separate address regions. Use Value: Boot block lockout ensures fallback boot code remains intact even during aggressive firmware development and testing cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV040B-90EC | 4 Mbit density (512K × 8), 90 ns access, 3 V core with 5 V I/O tolerance; lacks dedicated boot block lockout | Requires external logic or software to emulate boot protection; better suited for higher-density, lower-voltage systems | Select when migrating to 3 V systems or needing >512 Kbit capacity; verify voltage translation for 5 V bus interfacing |
| SST39VF512-90-4C-NHE | 512 Kbit, 90 ns, 3.3 V operation only; includes sector-erase granularity and JEDEC-standard command set | Not 5 V-compatible; requires level-shifting for legacy 5 V microcontrollers | Choose for new 3.3 V designs prioritizing sector-level erase flexibility and industry-standard command compatibility |
Compared with AM29LV040B-90EC and SST39VF512-90-4C-NHE, the AT49F512-90VC uniquely delivers true 5V-only operation with integrated boot block lockout-enabling secure, no-level-shift in-system updates in legacy 5 V embedded platforms without external protection circuitry.
Availability
AT49F512-90VC is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU bootloader memory, and medical device configuration memory requiring stable component supply and long-term obsolescence management.
Supply support for AT49F512-90VC 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
Atmel Corporation (now part of Microchip Technology) is a fabless semiconductor company specializing in microcontrollers, nonvolatile memory, and security ICs for embedded applications.
The AT49F512-90VC belongs to Atmel's early-generation 5V Flash memory product line, designed specifically for cost-sensitive, 5V-based embedded systems requiring field-upgradable firmware with hardware-enforced boot code protection.
FAQ
What is the operating voltage range for the AT49F512-90VC?
The AT49F512-90VC operates exclusively at 5.0 V ±10%, meaning it requires a supply between 4.5 V and 5.5 V. It does not support 3.3 V or mixed-voltage operation. This 5V-only design eliminates the need for external high-voltage programming supplies and simplifies power architecture in legacy 5 V systems. The AT49F512-90VC incorporates VCC sensing to inhibit programming if the supply drops below ~3.8 V, preventing data corruption during brown-out conditions.
How does the boot block lockout feature work on the AT49F512-90VC?
The AT49F512-90VC includes an 8 KB boot block (addresses 0000h–1FFFh) that can be permanently write-protected via a six-byte software command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h). Once enabled, no erase or program commands affect this region. The AT49F512-90VC provides software detection: reading address 00002h returns I/O0 = high if lockout is active. This ensures bootloader integrity in safety-critical applications.
Can the AT49F512-90VC be used as a direct replacement for standard EPROMs?
Yes-the AT49F512-90VC uses identical read-cycle timing and pinout as common 27C512 EPROMs, supporting direct socket replacement in existing designs. Its CE/OE/WE control scheme and output drive characteristics match EPROM behavior, allowing seamless integration without PCB changes. However, the AT49F512-90VC requires specific software commands for programming and erase, unlike UV-erasable EPROMs. The AT49F512-90VC retains EPROM compatibility while adding in-system reprogrammability and hardware data protection.
What methods does the AT49F512-90VC provide to detect program or erase completion?
The AT49F512-90VC offers two hardware-verified status detection methods: DATA polling (reading the programmed byte returns complemented data until completion, then true data) and toggle-bit detection (I/O6 toggles during operation and stabilizes upon completion). Both methods eliminate reliance on fixed delay timers and allow real-time, bus-efficient monitoring. These mechanisms are integral to the AT49F512-90VC's command register architecture and require no additional components or firmware overhead.
What package type is used for the AT49F512-90VC, and what are its key mechanical dimensions?
The AT49F512-90VC is packaged in a 32-lead Very Small Outline Package (VSOP) with 0.5 mm lead pitch, measuring 8 mm × 14 mm body size. Its gull-wing leads comply with JEDEC MO-187AB standards. This surface-mount package enables high-density PCB layouts and automated assembly, distinguishing it from through-hole PDIP variants. The AT49F512-90VC's VSOP footprint is identical to other 32V-coded Atmel Flash devices, supporting consistent board design across speed grades.
AT49F512-90VC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 32-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:
- 512Kbit
- Memory Organization:
- 64K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 90 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49F512-90VC FAQ
1.How can I place an order for AT49F512-90VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F512-90VC 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 AT49F512-90VC reliable?
The price and inventory of AT49F512-90VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F512-90VC is usually 5 days.
3.What payment methods are accepted for AT49F512-90VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F512-90VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F512-90VC?
AT49F512-90VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F512-90VC 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 AT49F512-90VC?
For technical support, including AT49F512-90VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F512-90VC requirements.
6.How does Aetrix verify that AT49F512-90VC is sourced from the original manufacturer or authorized distributors?
All AT49F512-90VC 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 AT49F512-90VC meets industry standards.
7.What is the process for return or replacement of AT49F512-90VC?
All AT49F512-90VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F512-90VC, 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 AT49F512-90VC part is unused and in its original packaging.
Return procedure for AT49F512-90VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F512-90VC 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…
