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Microchip Technology AT49BV040A-70TI
- Part No.:
- AT49BV040A-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 32-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV040A-70TI.pdf
- Description:
- IC FLASH 4MBIT PARALLEL 32TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,937
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Product details
Overview
AT49BV040A-70TI from Atmel is a 4 Mbit (512K × 8) single-supply 2.7–3.6 V in-system reprogrammable Flash memory IC with 70 ns read access time, organized in sector architecture including one 16 KB boot block with programming lockout, two 8 KB parameter blocks, and eight main memory blocks (one 32 KB + seven 64 KB). It supports byte-by-byte programming (30 µs/byte typical), hardware data protection, and DATA polling for end-of-program detection - used in embedded firmware storage and boot code retention.
For engineers reviewing the AT49BV040A-70TI datasheet, AT49BV040A-70TI pinout, AT49BV040A-70TI application, or AT49BV040A-70TI equivalent, this page delivers verified technical context, validated pin functions, real-world use cases, and confirmed alternative parts - all grounded in Atmel's official documentation and packaging specifications for the 32-lead TSOP package.
Technical Context
The AT49BV040A-70TI implements standard EPROM-compatible read interface with CE/OE/WE control logic, enabling bus contention avoidance via dual-line enable. Its internal program control uses 4-cycle byte programming and 6-cycle sector/chip erase command sequences without external high-voltage inputs.
Sector architecture enables selective erasure: boot block (00000H–03FFFH), parameter blocks (04000H–07FFFH), and main memory blocks (08000H–7FFFFH). Boot block lockout is activated via six-command sequence and permanently disables erase/program operations in that 16 KB region.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 4 Mbit (524,288 × 8), sufficient for compact boot firmware and configuration data storage |
| Read Access Time | 70 ns max - meets timing requirements for 14 MHz system bus interfaces |
| Supply Voltage | 2.7–3.6 V single supply - compatible with 3.3 V logic systems and battery-backed operation |
| Byte Programming Time | 30 µs typical - enables rapid field updates without extended downtime |
| Chip Erase Time | 12 seconds max - deterministic full-array reset for recovery or reinitialization |
| End-of-Program Detection | DATA polling on I/O7 or toggle bit on I/O6 - eliminates need for fixed delay timers in host firmware |
| Write Endurance | 10,000 program/erase cycles - suitable for infrequent firmware updates over product lifetime |
| Standby Current | 50 µA CMOS - enables low-power retention in always-on embedded controllers |
Pinout & Package
AT49BV040A-70TI is packaged in a 32-lead Thin Small Outline Package (TSOP, Type 1, 8 × 20 mm), compliant with JEDEC MO-142 BD. Pin functions are identical across PLCC, TSOP, and VSOP variants per Atmel's pin configuration diagrams.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A11–A18 don't-care during command entry |
| CE | Chip Enable | Active-low chip select; latches address/data during programming/erase when paired with WE |
| OE | Output Enable | Active-low output control; must be high during write cycles to prevent bus conflict |
| WE | Write Enable | Active-low write strobe; controls data latching edge and initiates command cycles |
| I/O0–I/O7 | Bidirectional Data Bus | 8-bit parallel interface; carries command codes, data, manufacturer/device IDs, and polling responses |
| VCC | Power Supply | 2.7–3.6 V supply; internal voltage sensing inhibits programming if below 1.8 V |
| GND | Ground Reference | Signal and power return; required for stable read/write margins and noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Boot Block Programming Lockout | 16 KB (00000H–03FFFH) permanently protected after command activation - ensures secure bootloader integrity |
| Sector-Erasable Architecture | Independent erase of two 8 KB parameter blocks and eight main memory blocks - enables modular firmware updates |
| Hardware Data Protection | VCC sense, OE/CE/WE inhibit logic, and 15 ns noise filter - prevents spurious writes in electrically noisy environments |
| DATA Polling & Toggle Bit | I/O7 complement feedback and I/O6 toggling - provides host-agnostic, cycle-accurate program/erase completion signaling |
| Green Packaging Option | Pb/halide-free TSOP variant available - satisfies RoHS compliance for industrial and consumer deployments |
Applications
| Industrial PLC Firmware Storage | Medical Device Boot Code Retention |
|---|---|
|
Use Scenario: Storing boot loader and safety-critical initialization routines in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile firmware storage with guaranteed boot block integrity and 70 ns read latency for deterministic startup. Use Value: Boot block lockout prevents accidental overwrite during field firmware upgrades, ensuring fail-safe restart capability. |
Use Scenario: Holding certified bootloader and calibration data in portable diagnostic equipment requiring regulatory traceability and long-term data retention. IC Role / Device Role / Timing Role: Secure, low-power Flash memory with 50 µA standby current and hardware write protection for ISO 13485-compliant systems. Use Value: Sector erase allows safe parameter updates without disturbing validated boot code, reducing revalidation burden. |
| Automotive Infotainment Configuration | Networking Equipment Parameter Storage |
|
Use Scenario: Storing user preferences, display settings, and audio profiles in automotive head units subject to wide temperature (-40°C to +85°C) and vibration stress. IC Role / Device Role / Timing Role: Industrial-grade Flash memory with 10,000 write cycles and robust noise filtering for automotive ECU subsystems. Use Value: Hardware data protection prevents corruption from load dump transients, maintaining UI consistency across vehicle lifecycle. |
Use Scenario: Maintaining MAC addresses, IP configurations, and security keys in Ethernet switches and routers undergoing remote firmware patches. IC Role / Device Role / Timing Role: Byte-programmable Flash with DATA polling for reliable, interrupt-driven update handling in real-time network stacks. Use Value: Fast 30 µs/byte programming enables concurrent background updates without blocking packet forwarding paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF400A-70-4C-NHE | 4 Mbit, 70 ns, 3.0–3.6 V supply; lacks boot block lockout; uses different command set | No dedicated protected boot sector - requires external software management for bootloader safety | Choose when cost sensitivity outweighs need for hardware-enforced boot protection |
| MX29LV400CTTI-70G | 4 Mbit, 70 ns, 3.0–3.6 V; includes CFI-compliant command set and 16 KB boot sector, but lockout is not permanent | Boot sector protection is software-resettable - less suitable for tamper-resistant designs | Prefer when interoperability with CFI-based flash programmers is required |
Compared with SST39VF400A-70-4C-NHE and MX29LV400CTTI-70G, the AT49BV040A-70TI uniquely offers irreversible boot block lockout and Atmel's proven command-set stability - critical for safety-certified firmware where bootloader integrity must survive untrusted update agents.
Availability
AT49BV040A-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device boot code retention, and automotive infotainment configuration requiring stable component supply across extended product lifecycles.
Supply support for AT49BV040A-70TI 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 company specializing in microcontrollers, nonvolatile memory, and secure authentication ICs.
The AT49BV040A-70TI belongs to Atmel's legacy 2.7 V-only Flash memory product line, designed specifically for in-system reprogrammability in space-constrained, low-voltage embedded systems requiring reliable boot code storage.
FAQ
What is the maximum operating temperature range for the AT49BV040A-70TI?
The AT49BV040A-70TI is rated for industrial operation from -40°C to +85°C. This range is specified in the "DC and AC Operating Range" section of the datasheet and applies to all electrical characteristics including 70 ns read access time and 30 µs byte programming. The device maintains full functionality across this range without derating.
Does the AT49BV040A-70TI require external high-voltage programming signals?
No, the AT49BV040A-70TI does not require external high-voltage programming signals. All programming and erase operations are executed using only the 2.7–3.6 V VCC supply and standard 3.3 V logic-level commands applied to CE, OE, and WE pins. Internal charge pumps generate necessary voltages, eliminating need for 12 V or other auxiliary supplies.
How is boot block protection enabled on the AT49BV040A-70TI?
Boot block protection on the AT49BV040A-70TI is enabled by executing a precise six-cycle command sequence: load 0xAA to address 0x555, 0x55 to 0xAAA, 0x80 to 0x555, then 0xAA to 0x555, 0x55 to 0xAAA, and finally 0x40 to 0x555. Once completed, the 16 KB boot block (00000H–03FFFH) becomes permanently read-only and cannot be erased or programmed.
Can the AT49BV040A-70TI be used as a direct replacement for the AT49BV040A-70JI?
The AT49BV040A-70TI and AT49BV040A-70JI share identical electrical specifications, timing parameters, and command sets. They differ only in package type: TSOP vs. PLCC. Mechanical compatibility depends on PCB layout - no electrical redesign is needed, but socket or footprint adaptation is required due to different pin pitch and body dimensions.
What methods does the AT49BV040A-70TI provide to detect completion of a programming cycle?
The AT49BV040A-70TI provides two hardware-supported methods: DATA polling (reading the last programmed byte returns its complement on I/O7 until completion) and Toggle Bit detection (I/O6 toggles between 0 and 1 during programming and stabilizes upon completion). Both methods eliminate reliance on fixed timeout delays in host firmware.
AT49BV040A-70TI 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:
- 4Mbit
- Memory Organization:
- 512K x 8
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 50µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-TSOP
AT49BV040A-70TI FAQ
1.How can I place an order for AT49BV040A-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV040A-70TI 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 AT49BV040A-70TI reliable?
The price and inventory of AT49BV040A-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV040A-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV040A-70TI?
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4.How is shipping managed for AT49BV040A-70TI?
AT49BV040A-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV040A-70TI 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 AT49BV040A-70TI?
For technical support, including AT49BV040A-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV040A-70TI requirements.
6.How does Aetrix verify that AT49BV040A-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV040A-70TI 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 AT49BV040A-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV040A-70TI?
All AT49BV040A-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV040A-70TI, 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 AT49BV040A-70TI part is unused and in its original packaging.
Return procedure for AT49BV040A-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV040A-70TI Tags
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