My Inquiry
My Account
Microchip Technology AT49BV322A-70TI
- Part No.:
- AT49BV322A-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV322A-70TI.pdf
- Description:
- IC FLASH 32MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,462
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV322A-70TI from Microchip Technology (formerly Atmel) is a 32-Mbit (2M × 16 / 4M × 8) single-supply Flash memory IC with 70 ns access time, sector erase architecture (63 × 64 KB + 8 × 8 KB), and suspend/resume capability for in-system programming. It operates from 2.65V to 3.6V and supports both byte and word data configurations via the BYTE pin - used in embedded boot code storage, firmware update modules, and industrial controller BIOS.
For engineers reviewing the AT49BV322A-70TI datasheet, AT49BV322A-70TI pinout, AT49BV322A-70TI application, or AT49BV322A-70TI equivalent, key selection considerations include its TSOP-48/CBGA-48 dual-package support, 128-bit protection register, Common Flash Interface (CFI) compliance, sector lockdown for secure boot, and VPP-based hardware write protection.
Technical Context
The AT49BV322A-70TI implements a command-driven Flash architecture with dedicated status bits (I/O2–I/O7, RDY/BUSY) for program/erase monitoring and supports two configuration modes via a programmable register: auto-return-to-read (00) or explicit Product ID Exit required (01). Its Erase Suspend and Program Suspend features enable concurrent read/program operations across non-suspending sectors.
It uses a 21-bit address bus (A0–A20) and dual-mode I/O (x8/x16) controlled by the BYTE pin; I/O15 serves as A−1 in byte mode. The device integrates hardware data protection including VCC sense (<1.8V inhibit), VPP voltage validation (0.4V min / 0.9V min active), and 10 ms power-on delay before enabling writes.
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 firmware images for mid-tier microcontrollers. |
| Access Time | 70 ns - enables direct execution from flash (XIP) in real-time control loops without wait states. |
| Erase Architecture | 71 sectors: 63 × 64 KB + 8 × 8 KB - allows granular firmware partitioning (e.g., bootloader vs. application). |
| Program/Erase End Detection | Data Polling (I/O7), Toggle Bit (I/O6), RDY/BUSY open-drain - provides flexible, hardware- or software-driven operation completion signaling. |
| Write Protection | VPP pin (0.4V inhibit / ≥0.9V enable) + sector lockdown + 128-bit user-programmable protection register - ensures secure boot integrity and field-upgrade safety. |
| Power Consumption | 12 mA active, 13 µA standby - suitable for battery-backed or low-power industrial systems requiring persistent nonvolatile storage. |
| Cycle Endurance | Minimum 100,000 erase cycles per sector - validated for frequent firmware update deployments over product lifetime. |
| Interface Standard | Common Flash Interface (CFI) compliant - enables automatic driver detection and OS-level flash abstraction (e.g., Linux MTD). |
Pinout & Package
AT49BV322A-70TI is available in 48-pin TSOP Type I (JEDEC MO-143AC) and 48-ball CBGA (ball-down) packages. Both share identical pin functions and logic behavior.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A20 | Address Inputs | 21-bit address bus; A−1 function on I/O15 in byte mode enables LSB extension for x8 addressing. |
| CE, OE, WE | Chip/Output/Write Enable | Dual-line CE/OE control prevents bus contention; WE latches commands and data during programming/erase sequences. |
| BYTE | Data Width Select | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active, I/O15 = A−1). |
| I/O0–I/O15 | Bidirectional Data Bus | x16: full 16-bit parallel interface; x8: lower 8 bits only, upper 8 tri-stated except I/O15 repurposed as address input. |
| RDY/BUSY | Open-Drain Status Output | Active-low during internal program/erase; supports wired-OR of multiple devices on shared status line. |
| VPP | Write Protection Voltage Input | Mandatory external supply; <0.4V disables all writes; ≥0.9V enables program/erase - prevents accidental corruption. |
| RESET | Hardware Initialization | Asynchronous reset halts ongoing operations and forces return to read/standby mode - critical for recovery after power glitches. |
| NC | No Connect | Pin 23 (TSOP) and Ball E6 (CBGA) are unconnected - must be left floating or tied to GND per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Flexibility | 63 × 64 KB + 8 × 8 KB independently lockable sectors - enables selective firmware updates without erasing bootloader or calibration data. |
| Erase/Program Suspend | Interrupt long erase (≤300 ms) or program (≤12 µs) to read/program other sectors - essential for real-time systems requiring background updates. |
| Secure Boot Support | Sector lockdown + 128-bit protection register (factory-block A + user-lockable block B) - enforces immutable boot code and cryptographic key storage. |
| CFI Compliance | Standardized query table accessible at address 0x55 (98h command) - eliminates hard-coded driver dependencies and simplifies cross-vendor migration. |
| Single-Supply Operation | 2.65V–3.6V VCC range with integrated charge pumps - removes need for auxiliary 12V programming supply in embedded designs. |
| Hardware Write Protection | VPP pin + VCC sense + control signal gating (CE/OE/WE) - multi-layer defense against unintended writes during brown-out or noise events. |
Applications
| Industrial PLC Firmware Storage | Automotive Instrument Cluster Boot Memory |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers with runtime diagnostics. IC Role / Device Role / Timing Role: Nonvolatile program storage with sector lockdown protecting bootloader and watchdog initialization routines. Use Value: Enables field firmware patches without replacing hardware; 70 ns access supports deterministic scan-cycle timing in sub-10 ms control loops. |
Use Scenario: Holding boot code and display firmware in automotive digital instrument clusters requiring ASIL-B compliance. IC Role / Device Role / Timing Role: Secure boot memory with CFI-enabled driver auto-detection and 100,000-cycle endurance for lifetime OTA updates. Use Value: Sector lockdown prevents unauthorized modification of safety-critical startup sequences; VPP-based protection meets ISO 26262 hardware fault tolerance requirements. |
| Medical Device Configuration Storage | Networking Equipment Image Repository |
|
Use Scenario: Retaining calibrated sensor parameters and regulatory-compliant operational profiles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Parameter storage with 128-bit protection register securing calibration constants and audit logs. Use Value: Tamper-evident storage via locked Block B prevents unauthorized recalibration; low 13 µA standby extends battery life in handheld units. |
Use Scenario: Hosting primary and fallback firmware images in enterprise switches/routers supporting zero-touch provisioning. IC Role / Device Role / Timing Role: Dual-image flash with suspend/resume allowing background download while maintaining live traffic forwarding. Use Value: Erase suspend permits reading active image during fallback image programming - eliminates service interruption during upgrades. |
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, 3.0–3.6V, TSOP-48; lacks CFI, no VPP pin, no sector suspend/resume. | Lower-cost replacement where suspend/resume and secure lockdown are not required. | Choose when CFI, sector lockdown, or VPP-based hardware protection are unnecessary - reduces BOM cost but sacrifices upgrade flexibility and security. |
| MX29LV320ETTI-70G | 32 Mbit, 70 ns, 2.7–3.6V, TSOP-48; includes CFI and sector protection, but no VPP pin or 128-bit register. | Drop-in alternative for CFI-based systems needing basic sector locking, but not advanced security features. | Prefer when migrating legacy CFI drivers and requiring sector-level write protection - omitting VPP simplifies power design but weakens hardware-level write inhibition. |
Compared with SST39VF3201C-70-4C-EKE and MX29LV320ETTI-70G, the AT49BV322A-70TI uniquely combines VPP-based hardware write protection, 128-bit programmable security register, and full erase/program suspend capability - making it the only option among the three qualified for secure, real-time upgradable embedded systems.
Availability
AT49BV322A-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive instrument cluster boot memory, and medical device configuration storage requiring stable component supply across extended production lifecycles.
Supply support for AT49BV322A-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
Microchip Technology acquired Atmel in 2016 and maintains full technical and manufacturing continuity for the AT49BV series of parallel Flash memories.
The AT49BV322A-70TI belongs to Atmel's legacy parallel-interface Flash product line, designed specifically for embedded systems requiring in-system programmability, secure boot, and deterministic timing in resource-constrained environments.
FAQ
What is the operating voltage range for the AT49BV322A-70TI?
The AT49BV322A-70TI operates from 2.65V to 3.6V on VCC. It includes built-in VCC sense circuitry that inhibits programming if VCC drops below ~1.8V, and requires a 10 ms power-on delay before enabling writes. This ensures reliable operation across wide-input industrial power rails while preventing corruption during brown-out conditions - a core requirement for the AT49BV322A-70TI's target applications.
Does the AT49BV322A-70TI support both x8 and x16 data bus configurations?
Yes, the AT49BV322A-70TI supports both configurations via the BYTE pin: logic high enables x16 mode (I/O0–I/O15 active), logic low enables x8 mode (I/O0–I/O7 active, I/O15 repurposed as A−1 address input). This dual-mode flexibility allows the same AT49BV322A-70TI part to interface with 8-bit microcontrollers or 16-bit DSPs without redesign - a key advantage in mixed-architecture embedded platforms.
How does sector lockdown work on the AT49BV322A-70TI?
Sector lockdown on the AT49BV322A-70TI is enabled per-sector using a six-bus-cycle command. Once activated, the locked sector becomes read-only - immune to program or erase commands until the next power cycle or RESET assertion. This feature protects bootloader code stored in SA0–SA7 (the 8 × 8 KB top/bottom boot blocks), ensuring system reliability even during field firmware updates - a defining capability of the AT49BV322A-70TI.
What methods does the AT49BV322A-70TI provide to detect program/erase completion?
The AT49BV322A-70TI offers three independent methods: (1) RDY/BUSY pin (open-drain active-low), (2) Data Polling on I/O7, and (3) Toggle Bit on I/O6. These can be used individually or in combination - for example, polling I/O7 while monitoring RDY/BUSY - to maximize robustness in noisy environments. All three mechanisms are fully supported in both configuration register modes (00/01), ensuring deterministic timing control for the AT49BV322A-70TI in safety-critical systems.
Is the AT49BV322A-70TI RoHS and green packaging compliant?
Yes, the AT49BV322A-70TI is offered in green (Pb/Halide-free) packaging per JEDEC J-STD-609, with lead-free solderability verified to IPC/JEDEC J-STD-020. The TSOP-48 and CBGA-48 variants both meet RoHS Directive 2011/65/EU and REACH SVHC requirements. This compliance is documented in Microchip's official part marking and packaging specifications for the AT49BV322A-70TI, supporting global environmental certification needs.
AT49BV322A-70TI 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:
- 4M x 8, 2M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 200µs
- 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
AT49BV322A-70TI FAQ
1.How can I place an order for AT49BV322A-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV322A-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 AT49BV322A-70TI reliable?
The price and inventory of AT49BV322A-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV322A-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV322A-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV322A-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV322A-70TI?
AT49BV322A-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV322A-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 AT49BV322A-70TI?
For technical support, including AT49BV322A-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV322A-70TI requirements.
6.How does Aetrix verify that AT49BV322A-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV322A-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 AT49BV322A-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV322A-70TI?
All AT49BV322A-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV322A-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 AT49BV322A-70TI part is unused and in its original packaging.
Return procedure for AT49BV322A-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV322A-70TI 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…
