My Inquiry
My Account
Microchip Technology AT49BV802D-70TU
- Part No.:
- AT49BV802D-70TU
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV802D-70TU.pdf
- Description:
- IC FLASH 8MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,716
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV802D-70TU from Microchip Technology (formerly Atmel) is an 8-Mbit (512K × 16 / 1M × 8) single-supply 3V Flash memory IC with sector erase architecture, 70 ns access time, and dual-mode byte/word data interface. It supports in-system programming, sector lockdown, and suspend/resume for concurrent read/program operations - deployed in embedded boot code storage and firmware update modules.
For engineers reviewing the AT49BV802D-70TU datasheet, AT49BV802D-70TU pinout, AT49BV802D-70TU application, or AT49BV802D-70TU equivalent, key selection considerations include sector lock granularity (8×4K + 15×32K), CFI compliance for auto-configuration, RDY/BUSY open-drain signaling, 128-bit protection register security, and TSOP-48 package compatibility with legacy 3V Flash footprints.
Technical Context
The AT49BV802D-70TU implements a command-register-based Flash architecture with hardware data protection (VCC sense, 10 ms power-on delay, control-line inhibit). Its 23-sector layout includes eight 4K-word (8K-byte) and fifteen 32K-word (64K-byte) sectors, each individually lockable via six-cycle Sector Lockdown command.
It supports two operational modes: word (x16, I/O₀–I/O₁₅ active) and byte (x8, I/O₀–I/O₇ active, I/O₁₅ repurposed as A₋₁), selected by the BYTE pin. Status reporting uses I/O₂/I/O₅/I/O₆/I/O₇ bits plus open-drain RDY/BUSY, configurable via a two-bit status register that determines automatic return to read mode or requirement of Product ID Exit after program/erase.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 8 Mbit (524,288 × 16 or 1,048,576 × 8) - supports both x16 and x8 bus interfaces without external glue logic. |
| Access Time | 70 ns - enables direct connection to 14 MHz microcontrollers without wait states in read mode. |
| Supply Voltage | 2.65 V to 3.6 V - compatible with 3.3 V ±10% systems and tolerant of brown-out conditions down to 2.65 V. |
| Program Time | 10 µs per byte/word - reduces firmware update latency; accelerated further via optional Single Pulse Program Mode. |
| Sector Erase Time | 100 ms max per sector - allows selective field updates without full chip erase; supports suspend/resume during erase. |
| Erase Endurance | 100,000 cycles minimum - qualifies for industrial firmware storage requiring frequent over-the-air (OTA) updates. |
| CFI Support | Yes - enables runtime detection of geometry, timing, and command set for portable flash drivers across multiple vendors. |
| Protection Register | 128-bit (64-bit factory-programmed Block A + 64-bit user-programmable & lockable Block B) - provides secure boot key storage and anti-cloning capability. |
Pinout & Package
AT49BV802D-70TU is available in a 48-lead TSOP-I (Type 1) package with standard 12.0 mm × 20.0 mm footprint and 0.5 mm lead pitch. Pin functions are validated per Microchip datasheet 3626A–FLASH–2/07.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A18 | Address Inputs | 19-bit address bus supporting full 512K-word addressing; A₋₁ alias on I/O₁₅ in byte mode. |
| I/O0–I/O14 | Data I/O (bidirectional) | Primary data path; I/O₁₅ serves dual role: data bit 15 (x16) or LSB address (A₋₁, x8). |
| I/O15 (A-1) | Mode-dependent terminal | In word mode: data bit 15; in byte mode: A₋₁ input enabling 1M-byte addressing with 8-bit bus. |
| CE, OE, WE | Chip/Output/Write Enable | Three independent controls prevent bus contention; OE/CE low + WE high = read; CE/WE low + OE high = write. |
| BYTE | Interface mode select | Logic high = x16 operation (I/O₀–I/O₁₅ active); logic low = x8 operation (I/O₀–I/O₇ active, I/O₈–I/O₁₄ tri-stated). |
| RDY/BUSY | Open-drain status output | Active-low during internal program/erase; supports wired-OR of multiple devices on shared status line. |
| RESET | Hardware initialization | Pulsing low ≥500 ns halts ongoing operation and forces device into read/standby mode. |
| NC | No-connect | Two pins (TSOP pins 9,10 and CBGA balls D1,E1) - must be left unconnected per design. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 23 independently erasable sectors (8×4K-word + 15×32K-word) enable granular firmware patching without full reflash. |
| Erase/Program Suspend | Allows real-time interruption of erase/program to read or program other sectors - critical for responsive boot loaders. |
| Single Pulse Program Mode | Reduces programming overhead: after 6-byte entry sequence, only one WE pulse required per byte/word write. |
| Sector Lockdown | Per-sector write-protection prevents accidental overwrite of boot code; locked sectors remain readable but immune to erase/program. |
| 128-bit Protection Register | Factory-block A stores unique ID; user-block B supports secure key storage and can be permanently locked against reprogramming. |
| Hardware Data Protection | VCC sense (<1.8 V inhibits write), 10 ms power-on delay, and control-line gating prevent spurious writes during power ramp or noise events. |
Applications
| Boot Code Storage | Firmware Update Module |
|---|---|
Use Scenario: Storing primary bootloader and BIOS/UEFI initialization code in industrial PLCs and medical imaging controllers. IC Role / Device Role / Timing Role: Non-volatile boot memory mapped at reset vector; accessed in x16 mode for fast instruction fetch. Use Value: Sector lockdown protects SA0–SA7 (8×4K) containing immutable startup routines while allowing field updates to application sectors. | Use Scenario: Field-upgradable firmware storage in network routers and IoT gateways with OTA capability. IC Role / Device Role / Timing Role: Dual-bank emulated flash using suspend/resume to read active image while programming standby bank. Use Value: 100 ms sector erase + 10 µs program enables sub-second firmware swaps without system downtime. |
| Secure Key Repository | Legacy System Replacement |
Use Scenario: Storing cryptographic keys and device identity in payment terminals and smart meters. IC Role / Device Role / Timing Role: Secure non-volatile storage leveraging 128-bit protection register with factory-block A and lockable user-block B. Use Value: Block B lock prevents post-deployment key extraction or tampering; CFI support simplifies driver porting across platforms. | Use Scenario: Drop-in replacement for obsolete 3V Flash in avionics display units and automotive instrument clusters. IC Role / Device Role / Timing Role: Pin-compatible TSOP-48 upgrade path for legacy AT29C040 or AM29LV040 designs. Use Value: 70 ns access time and identical control protocol ensure zero firmware changes; green Pb/Halide-free packaging meets RoHS/REACH. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF800A-70-4C-EKE | Same density (8 Mbit), 70 ns access, TSOP-48, but lacks CFI and 128-bit protection register; uses different command set. | No built-in sector lockdown or suspend/resume - requires external logic for safe OTA updates. | Choose when CFI and advanced security are unnecessary and cost is primary constraint. |
| MX29LV800CTTI-70G | 8 Mbit, 70 ns, TSOP-48, supports CFI and sector protection, but no 128-bit register; requires VPP = 12 V for program/erase in some modes. | Higher voltage requirement complicates power design; lacks Byte/Word mode flexibility (x16-only). | Prefer where existing board already supplies 12 V and x16-only interface suffices. |
Compared with SST39VF800A-70-4C-EKE and MX29LV800CTTI-70G, the AT49BV802D-70TU uniquely combines CFI, dual-mode interface, sector suspend/resume, and 128-bit protection - making it optimal for secure, field-upgradable embedded systems requiring minimal hardware redesign.
Availability
AT49BV802D-70TU is available at Aetrix Electronics and suitable for industrial control systems, medical diagnostics equipment, and automotive infotainment head units requiring stable component supply and long-term lifecycle support.
Supply support for AT49BV802D-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 devices, and Flash memory solutions for industrial, automotive, and communications markets.
The AT49BV802D-70TU belongs to Microchip's legacy parallel Flash memory product line, designed specifically for reliable, in-system programmable non-volatile storage in resource-constrained embedded systems with strict timing and security requirements.
FAQ
What is the difference between AT49BV802D-70TU and AT49BV802DT?
The AT49BV802D-70TU and AT49BV802DT share identical electrical specifications and pinout but differ in sector mapping: the -70TU variant uses bottom-boot configuration (smaller 4K sectors at lowest addresses), while the -70DT uses top-boot (larger 64K sectors at lowest addresses). This affects boot code placement and sector lockdown strategy. Both are supported by the same AT49BV802D-70TU datasheet revision 3626A–FLASH–2/07.
Does AT49BV802D-70TU support both x8 and x16 data bus widths?
Yes, AT49BV802D-70TU 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 becomes A₋₁). Address ranges differ accordingly - 512K words in x16 mode versus 1M bytes in x8 mode - and sector tables are provided separately for each configuration in the AT49BV802D-70TU datasheet.
How does sector lockdown work on AT49BV802D-70TU?
Sector lockdown on AT49BV802D-70TU is enabled per sector using a six-cycle command (555h/AAh → AAah/55h → 555h/80h → 555h/AAh → AAah/55h → SA/60h). Once locked, a sector becomes read-only - immune to erase and program - until power cycle or RESET. Lock status is verified by reading address 00002h within the sector: I/O₀ = 1 indicates lockdown active. All sectors power up unlocked.
Can AT49BV802D-70TU be used without external VPP voltage?
Yes, AT49BV802D-70TU operates with a single 2.65–3.6 V supply for all functions - read, program, and erase - eliminating need for external VPP. Internal charge pump generates required high voltages. Hardware data protection ensures program/erase is inhibited if VCC drops below ~1.8 V or during power-up ramp, preventing corruption.
What status mechanisms indicate completion of program or erase on AT49BV802D-70TU?
AT49BV802D-70TU provides three concurrent status methods: (1) RDY/BUSY pin (open-drain, active-low), (2) Data Polling (I/O₇ complement or level depending on config register), and (3) Toggle Bit (I/O₆ toggles during operation, stops when complete). The configuration register (set via 4-cycle command) determines whether device auto-returns to read mode or requires Product ID Exit command after successful operation.
AT49BV802D-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:
- 8Mbit
- Memory Organization:
- 512K 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
AT49BV802D-70TU FAQ
1.How can I place an order for AT49BV802D-70TU through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV802D-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 AT49BV802D-70TU reliable?
The price and inventory of AT49BV802D-70TU are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV802D-70TU is usually 5 days.
3.What payment methods are accepted for AT49BV802D-70TU?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV802D-70TU transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV802D-70TU?
AT49BV802D-70TU orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV802D-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 AT49BV802D-70TU?
For technical support, including AT49BV802D-70TU datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV802D-70TU requirements.
6.How does Aetrix verify that AT49BV802D-70TU is sourced from the original manufacturer or authorized distributors?
All AT49BV802D-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 AT49BV802D-70TU meets industry standards.
7.What is the process for return or replacement of AT49BV802D-70TU?
All AT49BV802D-70TU units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV802D-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 AT49BV802D-70TU part is unused and in its original packaging.
Return procedure for AT49BV802D-70TU:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV802D-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…
