My Inquiry
My Account
Microchip Technology AT49BV322DT-70TU
- Part No.:
- AT49BV322DT-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV322DT-70TU.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,043
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV322DT-70TU from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply Flash memory IC with sector erase architecture, 70 ns access time, and dual-mode (x8/x16) data interface - used for embedded boot code storage, firmware updates, and configuration retention in industrial controllers and communication modules.
For engineers reviewing the AT49BV322DT-70TU datasheet, AT49BV322DT-70TU pinout, AT49BV322DT-70TU application, or AT49BV322DT-70TU equivalent, key selection criteria include sector lockdown support, suspend/resume capability during erase/program, CFI compliance, VPP-controlled write acceleration, and TSOP/CBGA package compatibility with legacy 48-pin footprint designs.
Technical Context
This parallel-interface NOR Flash implements a command-based state machine with six-byte chip erase and sector erase sequences, supporting both byte and word programming modes via the BYTE pin. It integrates hardware data protection (VCC sense, VPP threshold lockout), a 128-bit user-programmable protection register (with factory-block A and lockable block B), and configurable status reporting (I/O2–I/O7).
The device features dual operation modes: standard four-cycle programming and accelerated single-pulse mode (entered via six-byte sequence), plus Erase Suspend/Resume and Program Suspend/Resume functions enabling concurrent read/program operations across non-conflicting sectors - critical for real-time firmware patching without halting system execution.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 32 Mbit (2,097,152 × 16-bit or 4,194,304 × 8-bit) - supports full boot image storage for 32-bit microcontrollers. |
| Access Time | 70 ns - enables direct execution from flash (XIP) in timing-critical control loops without wait states. |
| Supply Voltage | 2.65 V to 3.6 V - compatible with 3.3 V system rails; no separate VPP supply required for basic operation. |
| Erase Architecture | 71 sectors: sixty-three 64 KB + eight 8 KB sectors - allows granular firmware partitioning (e.g., bootloader in protected 8 KB sectors, application in 64 KB zones). |
| Program/Erase End Detection | RDY/BUSY pin + Data Polling (I/O7) + Toggle Bit (I/O6) - provides three independent hardware/software methods for cycle completion signaling. |
| Endurance | 100,000 erase cycles per sector - validated for field-upgradable systems requiring >10 years of annual firmware updates. |
| Common Flash Interface | CFI-compliant (query mode entered via 98h at 55h) - enables automatic driver initialization and multi-vendor flash abstraction in BSPs. |
Pinout & Package
AT49BV322DT-70TU is available in 48-lead TSOP Type I (thin small-outline package) and 48-ball CBGA (chip-scale ball grid array), both with identical pin function mapping and 12 × 20 mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus supporting full 2M-word addressing; A-1 alias on I/O15 in byte mode enables LSB extension. |
| I/O0–I/O15 / I/O15(A-1) | Data I/O / Address LSB | x16 mode: bidirectional data bus; x8 mode: I/O0–I/O7 active, I/O15 repurposed as A-1 for extended addressing. |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE high disables outputs regardless of CE/WE state. |
| BYTE | Interface Mode Select | Logic high = x16 word mode (I/O0–I/O15 active); logic low = x8 byte mode (I/O0–I/O7 active, I/O8–I/O14 tri-stated). |
| VPP | Write Protection & Acceleration | Below 0.4 V: inhibits all program/erase; ≥1.65 V: enables normal operation; 10.0 V: enables dual-word accelerated programming. |
| RDY/BUSY | Open-Drain Status Output | Active-low signal indicating internal program/erase activity; supports wired-OR connection for multi-device status monitoring. |
| RESET | Hardware Initialization | Pulsing low ≥500 ns forces return to read/standby mode and clears pending suspend states - essential for recovery after power glitches. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Lockdown | Per-sector write-protection enabled via six-cycle command; locked sectors remain read-only until reset/power cycle - secures bootloader integrity against accidental overwrite. |
| Erase/Program Suspend | Interrupt long erase (100 ms) or program (10 µs) operations to service urgent reads from other sectors - enables real-time response during firmware update. |
| Single-Pulse Programming Mode | After six-byte entry sequence, only one WE pulse required per byte/word write - reduces host CPU overhead by eliminating repeated command re-entry. |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable 64-bit block B - supports secure key storage and anti-cloning mechanisms in certified devices. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits programming), 10 ms power-on delay, and VPP voltage validation - prevents corruption during brown-out or unstable supply conditions. |
Applications
| Industrial PLC Firmware Storage | Telecom Baseband Configuration |
|---|---|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh environments with wide temperature swings. IC Role / Device Role / Timing Role: Nonvolatile boot memory holding startup code and runtime configuration tables; accessed via parallel bus during cold start and field upgrades. Use Value: Sector lockdown protects bootloader while allowing application sector erasure; 100,000-cycle endurance ensures >15-year field life with quarterly updates. | Use Scenario: Holding RF calibration parameters and protocol stack configuration in 4G/LTE base station radios requiring zero-downtime parameter reloads. IC Role / Device Role / Timing Role: Configuration register bank mapped into memory space; accessed by DSP during initialization and adaptive tuning cycles. Use Value: Erase suspend allows reading active calibration data from one sector while reprogramming another - eliminates service interruption during live network optimization. |
| Medical Imaging System Bootloader | Automotive ADAS Sensor Module |
Use Scenario: Securing certified bootloader code in MRI and CT scanner subsystems where regulatory compliance mandates immutable startup verification. IC Role / Device Role / Timing Role: Primary boot device storing signed firmware images and cryptographic keys; verified before transferring control to application processor. Use Value: 128-bit protection register stores device-unique keys; sector lockdown prevents tampering with secure boot chain - meets IEC 62304 Class C requirements. | Use Scenario: Storing sensor fusion algorithms and camera calibration data in automotive surround-view ECUs subject to AEC-Q100 Grade 2 temperature stress. IC Role / Device Role / Timing Role: Persistent memory for runtime-tuned parameters updated during vehicle self-test and recalibration routines. Use Value: CFI interface enables automatic driver detection across multiple flash vendors; 70 ns access time supports deterministic boot within 100 ms safety-critical window. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF3201C-70-4C-EKE | 32 Mbit, 70 ns, 3.0–3.6 V; lacks CFI, no suspend/resume, no 128-bit protection register | Lower-cost replacement where bootloader security and concurrent read/program are not required | Choose when cost sensitivity outweighs advanced feature needs and legacy SST39 drivers are already deployed. |
| MX29LV320ETTI-70G | 32 Mbit, 70 ns, 3.0–3.6 V; includes CFI and sector protection but no program suspend or 128-bit register | Drop-in alternative for systems needing CFI compatibility and basic sector locking without suspend capability | Select when migrating from Macronix platform and suspend functionality is handled externally in firmware. |
Compared with SST39VF3201C-70-4C-EKE and MX29LV320ETTI-70G, AT49BV322DT-70TU uniquely delivers integrated erase/program suspend, factory-programmed security block, and VPP-accelerated programming - making it the only option among the three suitable for safety-critical, real-time updatable systems requiring hardware-enforced boot integrity.
Availability
AT49BV322DT-70TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, telecom baseband configuration, medical imaging system bootloaders, and automotive ADAS sensor modules requiring stable component supply across extended product lifecycles.
Supply support for AT49BV322DT-70TU 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 acquired Atmel in 2016 and maintains its Flash memory portfolio for industrial, automotive, and communications applications with full backward compatibility and long-term support commitments.
The AT49BV322D(T) series was designed as a drop-in upgrade path for legacy 2.7 V Flash devices, emphasizing enhanced security (sector lockdown, 128-bit register), real-time flexibility (suspend/resume), and standardized interoperability (CFI) - targeting embedded systems requiring field-upgradable, tamper-resistant firmware storage.
FAQ
What is the primary function of the VPP pin on the AT49BV322DT-70TU?
The VPP pin on the AT49BV322DT-70TU serves dual roles: write protection and programming acceleration. When held below 0.4 V, it disables all program and erase operations - preventing accidental writes during power transitions. At ≥1.65 V, normal operations resume; at 10.0 V, it enables Dual Word Program mode for accelerated two-word parallel writes. The pin must never be left floating and requires stable voltage regulation per the datasheet's absolute maximum ratings.
How does the AT49BV322DT-70TU support real-time firmware updates without system interruption?
The AT49BV322DT-70TU supports real-time firmware updates via Erase Suspend and Program Suspend commands. These allow an ongoing sector erase or word program operation to be paused (within 15 µs or 20 µs respectively), enabling immediate reads or writes to other unprotected sectors. This capability lets systems maintain responsiveness - for example, servicing a CAN bus interrupt while background-updating a non-active firmware partition - without requiring full chip erase or external buffering.
Can the AT49BV322DT-70TU be used in both x8 and x16 data bus configurations?
Yes, the AT49BV322DT-70TU supports both configurations via the BYTE pin. With BYTE = high, it operates in x16 mode using I/O0–I/O15 for 16-bit data transfers; with BYTE = low, it switches to x8 mode where I/O0–I/O7 carry data and I/O15 becomes A-1 (LSB address input). This dual-mode flexibility allows seamless integration into 8-bit microcontroller systems or 16-bit DSP platforms without redesigning the memory interface.
What is the purpose and structure of the 128-bit protection register in the AT49BV322DT-70TU?
The 128-bit protection register in the AT49BV322DT-70TU consists of two 64-bit blocks: factory-programmed Block A (read-only, unique per unit) and user-programmable Block B (lockable after programming). Block B can store cryptographic keys or device-specific identifiers and is secured via a Lock Protection Register command. Once locked, Block B cannot be rewritten without a power cycle - providing hardware-enforced security for secure boot, anti-counterfeiting, and license enforcement in certified applications.
Is the AT49BV322DT-70TU compatible with Common Flash Interface (CFI) hosts?
Yes, the AT49BV322DT-70TU fully supports CFI. Entering CFI Query mode (by writing 98h to address 55h) allows host software to read standardized tables containing device geometry, sector maps, timing parameters, and supported commands. This enables automatic driver initialization, vendor-agnostic flash management, and simplified migration between compatible NOR Flash devices - reducing BSP development effort and improving long-term supply chain resilience.
AT49BV322DT-70TU Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-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:
- 32Mbit
- Memory Organization:
- 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 120µs
- Access Time:
- 70 ns
- Voltage - Supply:
- 2.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV322DT-70TU FAQ
1.How can I place an order for AT49BV322DT-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV322DT-70TU 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 AT49BV322DT-70TU reliable?
The price and inventory of AT49BV322DT-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV322DT-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV322DT-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV322DT-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV322DT-70TU?
AT49BV322DT-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV322DT-70TU 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 AT49BV322DT-70TU?
For technical support, including AT49BV322DT-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV322DT-70TU requirements.
6.How does Aetrix verify that AT49BV322DT-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV322DT-70TU 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 AT49BV322DT-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV322DT-70TU?
All AT49BV322DT-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV322DT-70TU, 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 AT49BV322DT-70TU part is unused and in its original packaging.
Return procedure for AT49BV322DT-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV322DT-70TU 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…
