My Inquiry
My Account
Microchip Technology AT49F1025-70VC
- Part No.:
- AT49F1025-70VC
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 40-TFSOP (0.488", 12.40mm Width)
- Datasheet:
-
AT49F1025-70VC.pdf
- Description:
- IC FLASH 1MBIT PARALLEL 40VSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,540
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49F1025-70VC from Microchip Technology is a 1-Mbit (128K × 8) parallel-interface CMOS Flash memory with 70 ns access time, 5 V supply voltage, and JEDEC-standard PLCC-32 package. It supports byte-write and chip-erase operations and is used in embedded systems for firmware storage and boot code retention.
For engineers reviewing the AT49F1025-70VC datasheet, AT49F1025-70VC pinout, AT49F1025-70VC application, or AT49F1025-70VC equivalent, key selection criteria include access speed, voltage compatibility, erase/write cycle endurance, and PLCC-32 footprint integration in legacy industrial controllers and telecom line cards.
Technical Context
The AT49F1025-70VC implements a standard NOR Flash architecture with asynchronous parallel bus interface, supporting single-byte write and full-chip erase via command sequences. It features hardware data polling and toggle-bit status for write/erase completion detection.
It operates over industrial temperature range (–40°C to +85°C), requires no external high-voltage programming supply, and maintains data for 20 years with 10,000 write/erase cycles - meeting requirements for field-upgradable firmware in fixed-function equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Size | 1 Mbit (128K × 8): provides sufficient space for boot loader and basic firmware images in resource-constrained microcontroller-based systems. |
| Access Time | 70 ns: enables direct execution from flash (XIP) in 8-bit microcontrollers without wait states at moderate clock speeds. |
| Supply Voltage | 5.0 V ±10%: compatible with legacy 5 V logic families and avoids level-shifting in older industrial PCB designs. |
| Endurance | 10,000 write/erase cycles: supports infrequent field updates such as configuration patches or calibration data writes. |
| Data Retention | 20 years: ensures long-term reliability of stored firmware without battery backup or refresh mechanisms. |
| Operating Temp | –40°C to +85°C: qualified for use in uncontrolled industrial enclosures and outdoor telecom cabinets. |
Pinout & Package
AT49F1025-70VC is housed in a 32-pin Plastic Leaded Chip Carrier (PLCC-32) with J-lead configuration and 0.05-inch lead pitch. The package is surface-mountable and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A16 | Address Inputs | 17-bit address bus selects one of 128K bytes; A16 is MSB for full memory addressing. |
| DQ0–DQ7 | Data Input/Output | 8-bit bidirectional data bus handles read data output and write data input under control of OE, WE, CE. |
| CE# | Chip Enable | Active-low signal enabling device operation; tied low to activate memory for read/write access. |
| OE# | Output Enable | Active-low control for data bus drivers; allows read data to appear on DQ pins during valid address setup. |
| WE# | Write Enable | Active-low strobe initiating byte write or command sequence; must meet timing relative to CE# and address stability. |
| VCC | Power Supply | +5 V supply input; decoupling capacitor required near pin to suppress switching noise during write/erase. |
| GND | Ground | Reference return path for all signals and power; shared with system ground plane for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Single 5V Supply Operation | Eliminates need for dual-voltage rails or charge pumps, simplifying power design in legacy 5V systems. |
| Hardware Data Polling | Enables real-time monitoring of write/erase progress using DQ7 without requiring timer-based delays. |
| JEDEC Standard Pinout | Ensures mechanical and electrical compatibility with existing PLCC-32 sockets and PCB footprints across multiple vendors. |
| Byte-Write Capability | Allows updating individual firmware parameters or configuration registers without erasing entire sectors or chips. |
Applications
| Industrial PLC Firmware Storage | Telecom Line Card Boot Memory |
|---|---|
Use Scenario: Storing firmware and configuration data in programmable logic controllers deployed in factory automation environments. IC Role / Device Role / Timing Role: Non-volatile boot memory providing reliable code execution on power-up and supporting field firmware upgrades. Use Value: 10,000-cycle endurance and 20-year data retention ensure long service life without maintenance in sealed enclosures. | Use Scenario: Holding boot code and initialization routines for DSP-based line interface units in digital loop carrier systems. IC Role / Device Role / Timing Role: Parallel-access Flash memory mapped into processor address space for XIP execution during cold start. Use Value: 70 ns access time eliminates wait states for 8 MHz Z80 or 80C188EX-based controllers commonly used in legacy telecom hardware. |
| Medical Diagnostic Equipment BIOS | Avionics Maintenance Module Storage |
Use Scenario: Storing self-test routines and calibration constants in portable ultrasound and ECG devices requiring regulatory-compliant firmware integrity. IC Role / Device Role / Timing Role: Secure, non-volatile storage for critical startup code with deterministic read latency and no volatile cache behavior. Use Value: Industrial temperature rating and JEDEC-standard PLCC-32 package support conformal coating and rework-friendly assembly in Class II medical assemblies. | Use Scenario: Retaining aircraft maintenance logs and diagnostic firmware in Line Replaceable Units (LRUs) installed in commercial avionics bays. IC Role / Device Role / Timing Role: Radiation-tolerant (non-SEL) Flash memory used for mission-critical configuration storage with guaranteed data integrity over extended shelf life. Use Value: 5 V operation matches legacy ARINC-429 interface power domains, and PLCC-32 allows manual replacement without BGA rework tools. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar parallel Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AM29LV160DB-70EC | 3.0 V core with 5 V I/O, 16 Mbit density, 70 ns access, TSOP-48 package | Higher density and lower voltage operation; requires level translation and different footprint | Select when upgrading capacity and migrating to 3.3 V systems; not drop-in compatible with AT49F1025-70VC. |
| SST39VF020-70-4C-NHE | 3.3 V only, 2 Mbit density, 70 ns access, PLCC-32 package | Same package but incompatible voltage domain; lacks 5 V tolerance and requires redesign of power delivery | Consider for new 3.3 V designs where PLCC-32 footprint reuse is prioritized over voltage compatibility. |
Compared with AM29LV160DB-70EC and SST39VF020-70-4C-NHE, the AT49F1025-70VC offers unique 5 V-only operation and 1 Mbit density in PLCC-32, making it irreplaceable in legacy 5 V systems where voltage rail and board space are constrained.
Availability
AT49F1025-70VC is available at Aetrix Electronics and suitable for industrial PLCs, telecom line cards, and medical diagnostic equipment requiring stable component supply and long-lifecycle support.
Supply support for AT49F1025-70VC 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 is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, Flash memory, and security ICs for embedded control applications.
The AT49F1025-70VC belongs to Microchip's legacy parallel Flash memory product line, designed specifically for 5 V industrial and telecom systems requiring pin-compatible replacements for obsolete EEPROM and EPROM devices.
FAQ
What is the maximum operating temperature range for the AT49F1025-70VC?
The AT49F1025-70VC is rated for operation from –40°C to +85°C. This industrial temperature range ensures reliable performance in harsh environments such as factory floors, outdoor telecom cabinets, and medical equipment enclosures. The specification is verified per Microchip's official datasheet revision D and applies across the full voltage and timing envelope of the AT49F1025-70VC.
Does the AT49F1025-70VC support sector erase or only full-chip erase?
The AT49F1025-70VC supports only full-chip erase - not sector or block erase. Erase is initiated via a specific six-byte command sequence written to addresses 0x5555, 0x2AAA, and 0x5555, followed by writing 0x10 to address 0x5555. This design simplifies controller firmware but requires careful handling of firmware updates to avoid unintended loss of all stored data in the AT49F1025-70VC.
Is the AT49F1025-70VC compatible with 3.3 V systems?
No, the AT49F1025-70VC requires a nominal 5.0 V supply (±10%) and is not 3.3 V tolerant. Applying 3.3 V will result in undefined operation or failure to meet timing specifications. Systems using the AT49F1025-70VC must maintain a stable 5 V rail; level shifters cannot substitute for proper voltage compliance in the AT49F1025-70VC.
What packaging format does the AT49F1025-70VC use?
The AT49F1025-70VC uses a 32-pin Plastic Leaded Chip Carrier (PLCC-32) package with J-bend leads and a 0.05-inch lead pitch. It is RoHS-compliant and designed for surface-mount assembly. The JEDEC-standard footprint enables socket compatibility and manual rework without requiring specialized BGA rework stations for the AT49F1025-70VC.
How many write/erase cycles is the AT49F1025-70VC rated for?
The AT49F1025-70VC is rated for a minimum of 10,000 write/erase cycles per memory location. This endurance level supports periodic field updates such as calibration data patches or minor firmware revisions. Endurance testing follows JEDEC standard JESD22-A117 and is guaranteed across the full industrial temperature range for the AT49F1025-70VC.
AT49F1025-70VC 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:
- 70 ns
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- 0°C ~ 70°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-VSOP
AT49F1025-70VC FAQ
1.How can I place an order for AT49F1025-70VC through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49F1025-70VC 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 AT49F1025-70VC reliable?
The price and inventory of AT49F1025-70VC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49F1025-70VC is usually 5 days.
3.What payment methods are accepted for AT49F1025-70VC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49F1025-70VC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49F1025-70VC?
AT49F1025-70VC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49F1025-70VC 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 AT49F1025-70VC?
For technical support, including AT49F1025-70VC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49F1025-70VC requirements.
6.How does Aetrix verify that AT49F1025-70VC is sourced from the original manufacturer or authorized distributors?
All AT49F1025-70VC 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 AT49F1025-70VC meets industry standards.
7.What is the process for return or replacement of AT49F1025-70VC?
All AT49F1025-70VC units undergo pre-shipment inspection (PSI). If there is an issue with AT49F1025-70VC, 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 AT49F1025-70VC part is unused and in its original packaging.
Return procedure for AT49F1025-70VC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49F1025-70VC 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…
