My Inquiry
My Account
Microchip Technology AT49F512-90VI
- Part No.:
- AT49F512-90VI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F512-90VI.pdf
- Description:
- IC FLASH 512KBIT PARALLEL 32VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,418
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49F512-90VI from Atmel is a 512K-bit (64K × 8) single-voltage 5V-only CMOS Flash memory IC with 90 ns read access time, 10 µs/byte programming, and 10-second chip erase - used for firmware storage and boot code in embedded microcontroller systems.
For engineers reviewing the AT49F512-90VI datasheet, AT49F512-90VI pinout, AT49F512-90VI application, or AT49F512-90VI equivalent, key selection criteria include industrial temperature range (-40°C to +85°C), boot block lockout (0000H–1FFFH), DATA polling/Toggle Bit end-of-program detection, and VSOP-32 (8 × 14 mm) package compatibility.
Technical Context
The AT49F512-90VI operates exclusively at 5V ±10%, eliminating need for high-voltage programming supplies. Its architecture supports EPROM-like read timing and software-controlled byte programming via 4-bus-cycle command sequences (e.g., 5555h/AAh → 2AAAh/55h → 5555h/A0h).
It implements hardware data protection including VCC sense (<3.8V inhibit), noise filtering (<15 ns pulse rejection), and dual-line control (CE/OE) for bus contention prevention. The optional 8K-byte boot block (0000H–1FFFH) supports permanent write lockout after activation via six-command sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 512 Kbit (64K × 8) - provides full firmware image storage for 8-bit microcontrollers |
| Read Access Time | 90 ns - meets timing requirements for 11 MHz system bus interfaces |
| Byte Programming Time | 10 µs/byte - enables fast field firmware updates without external high-voltage circuitry |
| Erase Cycle Time | 10 seconds (chip-erase) - allows full memory reset during production programming or recovery |
| End-of-Program Detection | DATA polling (I/O7 complement) and Toggle Bit (I/O6 toggling) - eliminates need for fixed delay timers in host firmware |
| Power Dissipation | 30 mA active / 100 µA CMOS standby - suitable for low-power industrial controllers with sleep modes |
| Endurance | 10,000 program/erase cycles - supports frequent firmware revision in test and calibration equipment |
| Operating Temperature | -40°C to +85°C - qualified for industrial-grade embedded applications |
Pinout & Package
AT49F512-90VI is packaged in a 32-lead Very Small Outline Package (VSOP), 8 mm × 14 mm body, with gull-wing leads and standard JEDEC pinout compatible with TSOP-32 footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address Inputs | 16-bit address bus supporting full 64K-word addressing (0000H–FFFFH) |
| I/O0–I/O7 | Bi-directional Data Bus | 8-bit parallel interface for read/write operations; high-impedance when CE or OE is high |
| CE | Chip Enable | Active-low device select; must be low with OE low and WE high for read access |
| OE | Output Enable | Active-low output control; enables data drivers only when CE is also low |
| WE | Write Enable | Active-low signal initiating byte programming or command latching; controls data latch edge |
| VCC | Power Supply | +5V ±10% supply; internal voltage regulation enables single-rail operation |
| GND | Ground Reference | Signal and power return; decoupling capacitor required within 10 mm of VCC pin |
| NC | No Connect | Unbonded pins (positions 1, 2, 31, 32 in VSOP); must remain unconnected per design |
Key Features
| Feature | Design Value |
|---|---|
| 5V-only operation | Eliminates need for +12V programming supply - simplifies PCB layout and reduces BOM count |
| Boot block lockout (0000H–1FFFH) | Prevents accidental overwrite of critical boot code while allowing main array reprogramming |
| DATA polling & Toggle Bit | Enables host MCU to detect programming completion without fixed delays or external status lines |
| Hardware data protection | VCC sense, noise filtering, and CE/OE/WE logic interlock prevent spurious writes during power transients |
| Software product identification | Manufacturer code (1Fh) and device code (03h) readable via command sequence - supports automated programming verification |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers operating in factory environments with wide temperature swings and EMI exposure. IC Role / Device Role / Timing Role: Nonvolatile program memory providing boot-up instructions and runtime parameter tables for ARM7-based controller CPUs. Use Value: Industrial temperature rating (-40°C to +85°C), 10,000-cycle endurance, and hardware write protection ensure long-term reliability in unattended operation. | Use Scenario: Holding certified boot loader and safety-critical initialization routines in portable diagnostic instruments requiring regulatory traceability. IC Role / Device Role / Timing Role: Secure boot memory with lockable 8K-byte sector preventing unauthorized modification of FDA-cleared startup code. Use Value: Boot block lockout (0000H–1FFFH) and software product ID (1Fh/03h) enable audit-ready firmware integrity verification. |
| Automotive ECU Calibration Storage | Test Equipment Field Upgrade Module |
Use Scenario: Storing engine calibration maps and sensor compensation tables in engine control units subject to thermal cycling and vibration. IC Role / Device Role / Timing Role: Reprogrammable flash memory interfaced directly to 8051-family MCUs via parallel bus for real-time map access. Use Value: 90 ns read access ensures sub-microsecond lookup latency; 5V-only operation avoids level-shifting complexity in 5V automotive domains. | Use Scenario: Enabling customer-field firmware updates for benchtop oscilloscopes and logic analyzers without returning units to service centers. IC Role / Device Role / Timing Role: In-system programmable memory holding application binaries and FPGA configuration bitstreams. Use Value: Chip-erase (10 s) and byte-program (10 µs) capabilities support rapid iterative development and remote update deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV512-90EC | 3V core with 5V I/O tolerance; 90 ns access; requires VPP = 12V for programming | Not 5V-only - needs dual-supply design; lacks boot block lockout feature | Select only if migrating to lower-power 3V systems and external high-voltage generation is acceptable |
| SST39VF512-90-4C-NHE | 5V-only; 90 ns access; 10 µs byte programming; no boot block - uniform 64K erase sectors | Missing dedicated boot sector protection; uses different command set (SST proprietary) | Choose when boot code protection is unnecessary and SST's faster sector-erase (18 ms) is preferred over chip-erase |
Compared with AM29LV512-90EC and SST39VF512-90-4C-NHE, the AT49F512-90VI uniquely combines true 5V-only operation, integrated boot block lockout, and Atmel's standardized command protocol - making it optimal for legacy 5V embedded designs requiring secure, field-upgradable firmware storage.
Availability
AT49F512-90VI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, automotive ECUs, and test equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for AT49F512-90VI 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 industrial and embedded markets.
The AT49F512-90VI belongs to Atmel's 5V Flash memory product line, designed specifically for drop-in EPROM replacement in legacy 5V systems requiring in-system reprogrammability without high-voltage programming infrastructure.
FAQ
What is the operating temperature range for the AT49F512-90VI?
The AT49F512-90VI is rated for industrial operation from -40°C to +85°C. This specification is confirmed in the Ordering Information table on page 10 of the datasheet, where "VI" suffix denotes industrial temperature grade. The device maintains full functionality-including 90 ns read access, 10 µs byte programming, and reliable DATA polling-across this entire range.
Does the AT49F512-90VI require external high-voltage programming supplies?
No, the AT49F512-90VI does not require external high-voltage programming supplies. It operates with single 5V ±10% VCC for both read and programming functions. Hardware data protection includes VCC sense that inhibits programming below ~3.8V, ensuring safe operation without 12V VPP rails. All commands-including chip erase and byte programming-are executed using standard 5V logic levels.
How is boot block protection implemented in the AT49F512-90VI?
The AT49F512-90VI implements boot block protection via a software-activated lockout feature covering addresses 0000H to 1FFFH (8K bytes). Once enabled using the six-command sequence (5555h/AAh → 2AAAh/55h → 5555h/80h → 5555h/AAh → 2AAAh/55h → 5555h/40h), the boot block becomes permanently read-only - neither erasable nor programmable. Status can be verified by reading I/O0 during software product identification mode.
What package type is used for the AT49F512-90VI?
The AT49F512-90VI uses a 32-lead Very Small Outline Package (VSOP) measuring 8 mm × 14 mm, designated as package code "32V" in Atmel's ordering information. This gull-wing surface-mount package is pin-compatible with TSOP-32 footprints and features standard JEDEC-compliant pinout shown in the VSOP Top View diagram on page 2 of the datasheet.
Can the AT49F512-90VI be used as a direct replacement for EPROMs like the 27C512?
Yes, the AT49F512-90VI is designed as a functional and pin-compatible replacement for 27C512 EPROMs in 5V systems. Its read operation mirrors EPROM timing (CE/OE controlled), and it shares identical 32-pin DIP/PLCC/TSOP/VSOP footprints. Unlike EPROMs, it supports in-system reprogramming without UV erasure - but requires software command sequences instead of hardware programming pulses.
AT49F512-90VI 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:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-VSOP
AT49F512-90VI FAQ
1.How can I place an order for AT49F512-90VI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F512-90VI 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 AT49F512-90VI reliable?
The price and inventory of AT49F512-90VI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F512-90VI is usually 5 days.
3.What payment methods are accepted for AT49F512-90VI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F512-90VI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F512-90VI?
AT49F512-90VI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F512-90VI 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 AT49F512-90VI?
For technical support, including AT49F512-90VI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F512-90VI requirements.
6.How does Aetrix verify that AT49F512-90VI is sourced from the original manufacturer or authorized distributors?
All AT49F512-90VI 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 AT49F512-90VI meets industry standards.
7.What is the process for return or replacement of AT49F512-90VI?
All AT49F512-90VI units undergo pre-shipment inspection (PSI). If there is an issue with AT49F512-90VI, 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 AT49F512-90VI part is unused and in its original packaging.
Return procedure for AT49F512-90VI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F512-90VI 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…
