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Microchip Technology AT49BV642DT-70TU
- Part No.:
- AT49BV642DT-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV642DT-70TU.pdf
- Description:
- IC FLASH 64MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,865
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Product details
Overview
AT49BV642DT-70TU from Microchip Technology is a 64-Mbit (4M × 16) 2.7–3.6V Flash memory IC with 70 ns access time, sector erase architecture (127 × 32K-word + 8 × 4K-word sectors), suspend/resume capability for concurrent read/program during erase, and Common Flash Interface (CFI) support. It enables in-system reprogramming in embedded controllers and boot code storage applications.
For engineers reviewing the AT49BV642DT-70TU datasheet, AT49BV642DT-70TU pinout, AT49BV642DT-70TU application, or AT49BV642DT-70TU equivalent, key selection criteria include sector lockdown security, VPP-accelerated programming at 10V, 128-bit protection register, TSOP-48 package compatibility, and CFI-based auto-configuration for flash-aware firmware.
Technical Context
The AT49BV642DT-70TU implements a command-register-based architecture supporting six-bus-cycle sector erase and chip erase, four-bus-cycle word programming, and single-pulse program mode entry via a six-word sequence. Its dual-status detection uses Data Polling (I/O7) and Toggle Bit (I/O6) with configurable behavior via a two-bit configuration register.
It integrates hardware data protection including VCC sense (<1.8V inhibit), VPP voltage monitoring (I/O3 status), erase/program timeout detection (I/O5), and sector lockdown enforced by reset/power-cycle unlock only. The device supports top/bottom boot block configuration and operates with VCCQ tied to VCC for 2.65–3.6V I/O levels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 64 Mbit (4,194,304 words × 16 bits) - supports full firmware images or large boot partitions in microcontroller systems |
| Access Time | 70 ns - ensures deterministic timing for real-time boot code fetch and interrupt vector reads |
| Supply Voltage | 2.65–3.6V - compatible with 3.3V system rails without level-shifting for host MCU interfaces |
| Sector Architecture | 127 × 32K-word + 8 × 4K-word sectors - enables granular firmware updates and protected bootloader regions |
| Program Time | 10 µs per word - reduces field update latency; accelerated dual-word programming available at VPP = 10V |
| Erase Time | 500 ms (32K-word sector), 100 ms (4K-word sector) - balances speed vs. endurance in wear-leveling implementations |
| Standby Current | 15 µA - suitable for battery-backed or low-power sleep modes in portable industrial devices |
| Package | 48-pin TSOP-I (Type 1) - surface-mount compatible with standard PCB assembly and space-constrained designs |
Pinout & Package
48-pin Thin Small Outline Package (TSOP-I, Type 1), 12 × 20 mm body, 0.5 mm pitch, JEDEC MO-141AC compliant. Pin 1 index located at top-left corner (notch side).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| I/O0–I/O15 | Data bus (bidirectional) | 16-bit parallel interface for high-throughput firmware load; supports byte/word access per control pin state |
| A0–A21 | Address inputs | 22-bit address bus enabling full 4M-word addressing; A0–A11 used in command sequences, A12–A21 for sector selection |
| CE, OE, WE | Chip/Output/Write Enable | Dual-line control (CE+OE low) prevents bus contention; WE active-low triggers command latching on falling edge |
| RESET | Hardware initialization | Asynchronous reset halts ongoing erase/program and forces high-impedance outputs - critical for safe power-up sequencing |
| VPP | Write protection & acceleration | 0.4V threshold disables programming; 1.65V enables normal operation; 10V enables dual-word fast programming |
| VCCQ | Output power supply | Separate 2.65–3.6V rail for I/O drivers - allows clean output swing independent of core VCC noise |
| GND, VCC | Power reference & supply | Dual GND pins (pins 24, 47) reduce ground bounce; VCC (pin 25) powers core logic and internal charge pumps |
Key Features
| Feature | Design Value |
|---|---|
| Erase/Program Suspend | 15 µs suspend latency enables concurrent read from non-erasing sectors - essential for real-time OS bootloaders |
| Sector Lockdown | Per-sector write-protection activated via six-bus command; unlocked only by power cycle - secures immutable boot code |
| 128-bit Protection Register | Factory-programmed Block A + user-writable/lockable Block B - supports cryptographic key binding and anti-cloning |
| Common Flash Interface (CFI) | Standardized query mode (0x98 at 0x55) returns timing, geometry, and command set - enables generic flash drivers |
| Single-Pulse Program Mode | After six-word entry sequence, single WE pulse writes one word - simplifies firmware update routines and reduces CPU overhead |
| Hardware Data Protection | VCC sense, VPP monitoring, and control pin gating prevent accidental writes - eliminates need for external write-enable logic |
Applications
| Industrial PLC Firmware Storage | Medical Device Bootloader |
|---|---|
Use Scenario: Storing firmware images and configuration tables in programmable logic controllers with field-upgrade capability. IC Role / Device Role / Timing Role: Non-volatile program memory mapped into MCU address space; accessed via synchronous parallel bus during boot and runtime. Use Value: Sector lockdown protects startup code from corruption; suspend/resume allows background firmware validation while executing control loops. | Use Scenario: Secure boot partition in FDA-cleared diagnostic equipment requiring tamper-resistant firmware integrity. IC Role / Device Role / Timing Role: Primary boot memory holding signed bootloader and secure key store; accessed at power-on reset before DRAM initialization. Use Value: 128-bit protection register stores asymmetric keys; CFI enables automated driver selection across product variants. |
| Automotive Infotainment Head Unit | Telecom Base Station Control Module |
Use Scenario: Storing UI assets, voice recognition models, and OTA update staging area in automotive infotainment systems. IC Role / Device Role / Timing Role: High-reliability Flash memory interfaced to ARM Cortex-A application processor via 16-bit EBI bus. Use Value: 70 ns access time meets real-time UI rendering deadlines; 4K-word sectors enable atomic update of small language packs. | Use Scenario: Configuration storage and failover firmware in carrier-grade base station controllers operating in extended temperature ranges. IC Role / Device Role / Timing Role: Standalone Flash memory providing redundant boot images and calibration data for FPGA-based control logic. Use Value: TSOP-48 package withstands thermal cycling; 15 µA standby current extends backup battery life during grid outages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF6401B-70-4C-EKE | 64 Mbit, 70 ns, 2.7–3.6V, 48-pin TSOP; lacks CFI and 128-bit protection register; no VPP acceleration | Lower security assurance; requires fixed driver stack; not suitable for secure boot or field-upgrade verification | Select when cost sensitivity outweighs CFI flexibility and hardware security requirements |
| MX29LV640ETTI-70G | 64 Mbit, 70 ns, 2.7–3.6V, 48-pin TSOP; includes CFI and sector protection but no suspend/resume or 128-bit register | Supports auto-configuration but cannot perform concurrent read/program during erase - limits real-time update capability | Choose for legacy systems needing CFI compatibility without suspend/resume latency constraints |
Compared with SST39VF6401B-70-4C-EKE and MX29LV640ETTI-70G, the AT49BV642DT-70TU uniquely combines CFI, suspend/resume, sector lockdown, and 128-bit protection in a single TSOP-48 package - making it optimal for secure, upgradable embedded systems where firmware integrity and real-time responsiveness are jointly critical.
Availability
AT49BV642DT-70TU is available at Aetrix Electronics and suitable for industrial PLC firmware storage, medical device bootloaders, automotive infotainment head units, and telecom base station control modules requiring stable component supply across extended product lifecycles.
Supply support for AT49BV642DT-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 is a global semiconductor company specializing in microcontrollers, analog components, and Flash memory solutions for embedded control applications.
The AT49BV642DT-70TU belongs to Microchip's legacy parallel Flash memory product line, designed specifically for reliable in-system programmability, secure boot code storage, and industrial-grade endurance in resource-constrained embedded systems.
FAQ
What is the maximum operating voltage for the VPP pin on the AT49BV642DT-70TU?
The AT49BV642DT-70TU specifies an absolute maximum VPP input voltage of 10.0V with respect to ground. For accelerated dual-word programming, VPP must be held at exactly 10.0V; at 1.65–10.0V it enables normal program/erase operations, and below 0.4V all write functions are inhibited. Operation outside this range risks permanent damage per the Absolute Maximum Ratings table.
Does the AT49BV642DT-70TU support true random-access word programming without erasing first?
No. The AT49BV642DT-70TU requires prior sector or chip erase before reprogramming any location. Erased bits are logical "1"; programming changes "1" to "0", but cannot revert "0" to "1" without erase. This applies to all word programming modes including single-pulse and dual-word - making erase timing and sector management critical in firmware update design.
How does the sector lockdown feature work on the AT49BV642DT-70TU?
The AT49BV642DT-70TU supports per-sector lockdown via a six-bus-cycle command. Once enabled, a locked sector becomes read-only: no erase, program, or suspend commands affect it. Unlocking requires a hardware reset or power cycle - there is no software unlock command. Lock status is verified by reading address 00002H within the sector, where I/O0 = high indicates lockdown is active.
Can the AT49BV642DT-70TU be used in systems with mixed 3.3V and 5V logic interfaces?
Yes - the AT49BV642DT-70TU accepts address and control inputs (A0–A21, CE, OE, WE, RESET) over 0–5.5V regardless of VCC level (2.65–3.6V), eliminating external level shifters for 5V-tolerant MCU interfaces. However, I/O lines are limited to 0–(VCCQ + 0.6V), so VCCQ must be tied to VCC (3.3V) for safe 3.3V-compatible operation.
What status bits indicate successful completion of a program operation on the AT49BV642DT-70TU?
Successful word programming on the AT49BV642DT-70TU is confirmed when I/O7 returns true data (not complement) *and* I/O5 and I/O3 remain low - indicating no timeout or VPP fault. If the configuration register is set to "01", I/O7 transitions high upon completion; if set to "00", valid data appears directly. I/O5 = 1 signals failure due to timeout or protected-sector access.
AT49BV642DT-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:
- 64Mbit
- Memory Organization:
- 4M x 16
- Memory Interface:
- Parallel
- Clock Frequency:
- -
- Write Cycle Time - Word, Page:
- 120µs
- 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:
- 48-TSOP
AT49BV642DT-70TU FAQ
1.How can I place an order for AT49BV642DT-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV642DT-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 AT49BV642DT-70TU reliable?
The price and inventory of AT49BV642DT-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV642DT-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV642DT-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV642DT-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV642DT-70TU?
AT49BV642DT-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV642DT-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 AT49BV642DT-70TU?
For technical support, including AT49BV642DT-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV642DT-70TU requirements.
6.How does Aetrix verify that AT49BV642DT-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV642DT-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 AT49BV642DT-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV642DT-70TU?
All AT49BV642DT-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV642DT-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 AT49BV642DT-70TU part is unused and in its original packaging.
Return procedure for AT49BV642DT-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV642DT-70TU Tags
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