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Microchip Technology AT49BV162A-70TI
- Part No.:
- AT49BV162A-70TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV162A-70TI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,112
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Product details
Overview
AT49BV162A-70TI from Atmel is a 16-Mbit (1M × 16 / 2M × 8) single-supply Flash memory IC operating at 2.65–3.6 V, featuring 55 ns read access time, sector erase architecture with 39 sectors (31 × 64 KB + 8 × 8 KB), and suspend/resume capability for concurrent read/program during erase. It supports in-system programming in embedded boot code storage applications.
For engineers reviewing the AT49BV162A-70TI datasheet, AT49BV162A-70TI pinout, AT49BV162A-70TI application, or AT49BV162A-70TI equivalent, key selection considerations include TSOP/CBGA package compatibility, byte/word mode configuration via BYTE pin, VPP-based hardware write protection, CFI compliance for firmware abstraction, and sector lockdown for secure boot code retention.
Technical Context
The AT49BV162A-70TI implements a command-register-based Flash architecture with dual-mode data interface (x8/x16), CE/OE/WE control logic to prevent bus contention, and internal state machine for autonomous program/erase timing. It uses address latching on falling CE/WE edges and data latching on rising edges per standard microprocessor timing.
Its erase suspend and program suspend features rely on dedicated one-cycle commands (B0h/30h) and internal status registers (I/O2–I/O7, RDY/BUSY) to enable real-time interruption of background operations. Sector lockdown and 128-bit protection register provide hardware-enforced security for boot code and user-defined credentials.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16-bit or 2,097,152 × 8-bit); enables compact firmware storage without external multiplexing. |
| Read Access Time | 55 ns max; meets timing requirements for 18 MHz bus interfaces in legacy embedded controllers. |
| Supply Voltage | 2.65–3.6 V single supply; eliminates need for separate VCC/VPP rails and simplifies power design. |
| Program Time | 12 µs per word; supports high-throughput firmware updates in production programming. |
| Erase Time | 300 ms per sector; allows selective field updates without full device reprogramming. |
| End-of-Operation Detection | RDY/BUSY pin + Data Polling (I/O7) + Toggle Bit (I/O6); provides multiple deterministic methods for host synchronization. |
| Erase Cycles | ≥100,000 per sector; ensures long-term reliability in industrial firmware update cycles. |
| Common Flash Interface | CFI-compliant (98h query command); enables OS-agnostic flash management in Linux/U-Boot environments. |
Pinout & Package
AT49BV162A-70TI is available in 48-lead TSOP (Type 1) and 48-ball CBGA packages. Both variants share identical pin functions and signal mapping, with VPP present only on AT49BV162A(T) variants (not AT49BV163A).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Inputs | 20-bit address bus supporting full 1M-word addressing; A-1 function on I/O15 in byte mode. |
| I/O0–I/O15 / I/O0–I/O7 | Data I/O (x16/x8) | Configurable via BYTE pin; x16 mode uses all 16 lines, x8 mode tri-states I/O8–I/O14 and repurposes I/O15 as LSB address. |
| CE | Chip Enable | Active-low chip select; must be low with OE low and WE high for valid read access. |
| OE | Output Enable | Active-low output control; used with CE to gate data bus and avoid contention during shared-bus operation. |
| WE | Write Enable | Active-low write strobe; latches addresses and data during command sequences and programming. |
| BYTE | Interface Mode Select | Logic high = x16 mode (I/O0–I/O15 active); logic low = x8 mode (I/O0–I/O7 active, I/O15 = A-1). |
| VPP | Write Protection Voltage | Must be ≥0.9 V for program/erase; <0.4 V disables all write operations - critical for accidental-write prevention. |
| RDY/BUSY | Open-drain Status Output | Pulled low during internal program/erase; supports wired-OR connection across multiple devices on same bus. |
| RESET | Hardware Initialization | Active-low reset halts ongoing operations and forces return to read/standby mode after release. |
Key Features
| Feature | Design Value |
|---|---|
| Sector Erase Architecture | 39 independently erasable sectors (31 × 64 KB + 8 × 8 KB) enables granular firmware partitioning and over-the-air update safety. |
| Erase/Program Suspend | Allows reading from or programming non-suspending sectors while erase/program runs elsewhere - essential for real-time system responsiveness. |
| Sector Lockdown | Per-sector write-protection activated via 6-cycle command; preserves boot loader integrity across field updates without software enforcement. |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable block B supports secure key storage and anti-cloning mechanisms. |
| Hardware Data Protection | VCC sense, VPP validation, and control-line inhibit logic prevent unintended writes during power ramp-up or noise events. |
| CFI Compliance | Standardized query mode (98h @ 55h) delivers runtime-accessible timing, geometry, and command-set metadata for portable flash drivers. |
Applications
| Industrial PLC Firmware Storage | Automotive ECU Boot Code Retention |
|---|---|
|
Use Scenario: Storing firmware images and configuration parameters in programmable logic controllers subject to frequent field updates and harsh thermal cycling. IC Role / Device Role / Timing Role: Non-volatile boot memory providing x16 interface to ARM9 or ColdFire MCU with 55 ns read latency for fast startup. Use Value: Sector lockdown prevents corruption of bootloader during application firmware upgrades; 100,000 erase cycles ensure >10-year service life under weekly update schedules. |
Use Scenario: Holding certified boot code and calibration data in engine control units where functional safety (ISO 26262) mandates immutable first-stage loader. IC Role / Device Role / Timing Role: Secure Flash memory with hardware write protection (VPP + sector lockdown) ensuring boot integrity independent of software stack. Use Value: 128-bit protection register stores cryptographic keys; CFI support enables ASAM-compliant flash programming tools to auto-detect device geometry and timing. |
| Medical Device Configuration Memory | Networking Equipment Image Backup |
|
Use Scenario: Retaining FDA-approved device settings and calibration profiles in diagnostic imaging systems requiring audit-trail-capable parameter persistence. IC Role / Device Role / Timing Role: Dual-mode (x8/x16) Flash interfaced to MIPS-based SoC; BYTE pin selects optimal bandwidth for configuration vs. image storage. Use Value: Erase suspend allows real-time parameter reads during background firmware validation; RDY/BUSY pin synchronizes with watchdog timer for fail-safe recovery. |
Use Scenario: Maintaining redundant firmware images and boot scripts in enterprise switches/routers undergoing zero-downtime software upgrades. IC Role / Device Role / Timing Role: High-reliability Flash with 300 ms sector erase enabling atomic image swaps without interrupting packet forwarding. Use Value: TSOP package supports automated optical inspection; green (Pb/Halide-free) compliance meets RoHS/REACH requirements for global deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1601C-70-4C-EKE | Same density (16 Mbit), 70 ns access, 3.0–3.6 V supply; lacks VPP pin and sector lockdown; uses different command set. | No hardware write protection or secure boot features; requires software-managed sector locking. | Choose when cost sensitivity outweighs security needs and existing firmware already handles erase/write sequencing. |
| MX29LV160DBTI-70G | 16 Mbit, 70 ns, 2.7–3.6 V; includes CFI but no VPP pin; offers top/bottom boot block but no 128-bit protection register. | Limited security functionality; no factory-programmed ID block or user-lockable credential storage. | Select for drop-in replacement where boot block configuration matches and CFI-driven driver reuse is prioritized over hardware security. |
Compared with SST39VF1601C-70-4C-EKE and MX29LV160DBTI-70G, the AT49BV162A-70TI uniquely integrates VPP-based hardware write inhibition, per-sector lockdown, and a factory-seeded 128-bit protection register - making it the only option among the three that satisfies secure boot and tamper-resistant credential storage requirements without software overhead.
Availability
AT49BV162A-70TI is available at Aetrix Electronics and suitable for industrial PLC firmware storage, automotive ECU boot code retention, and medical device configuration memory requiring stable component supply across extended product lifecycles.
Supply support for AT49BV162A-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 manufacturer specializing in microcontrollers, Flash memory, and secure authentication ICs for embedded systems.
The AT49BV162A-70TI belongs to Atmel's legacy parallel-interface Flash memory product line, designed specifically for reliable in-system programmability and secure boot code storage in safety-critical and long-lifecycle applications.
FAQ
What is the maximum read access time specification for AT49BV162A-70TI?
The AT49BV162A-70TI has a guaranteed maximum read access time of 55 ns across its full operating voltage range (2.65–3.6 V) and temperature range. This timing is measured from the last valid address setup to valid data appearing on I/O pins under standard CE/OE/WE control conditions. The "-70" suffix in the part number explicitly denotes this 55 ns speed grade, distinguishing it from slower variants like the -90 (90 ns) version.
Does AT49BV162A-70TI support both x8 and x16 data bus configurations?
Yes, AT49BV162A-70TI supports configurable x8 or x16 operation via the BYTE pin. When BYTE = high, the device operates in 16-bit mode with I/O0–I/O15 active; when BYTE = low, it operates in 8-bit mode with only I/O0–I/O7 active and I/O15 repurposed as the A-1 address input. This flexibility allows direct interface to either 8-bit or 16-bit microcontrollers without external glue logic.
How does hardware write protection work on AT49BV162A-70TI?
AT49BV162A-70TI implements hardware write protection through the VPP pin: program and erase functions are disabled when VPP < 0.4 V, and enabled only when VPP ≥ 0.9 V. This provides a physical, voltage-level barrier against accidental writes during power-up/down or noise events. Unlike software-only locks, VPP protection remains active regardless of command sequence execution or internal state machine status.
What is the purpose of the 128-bit protection register in AT49BV162A-70TI?
The 128-bit protection register in AT49BV162A-70TI consists of two 64-bit blocks: Block A is factory-programmed with a unique, unchangeable identifier; Block B is user-programmable and can be permanently locked. This structure supports secure key storage, device authentication, and anti-counterfeiting - for example, storing encrypted firmware signatures or cryptographic keys that persist across erase cycles and cannot be altered post-lock.
Can AT49BV162A-70TI perform read operations while erasing another sector?
Yes, AT49BV162A-70TI supports true concurrent operation via its Erase Suspend feature. Issuing the B0h suspend command pauses an ongoing sector or chip erase, allowing immediate reads (or writes) to any other non-suspending sector. The device guarantees ≤15 µs suspend latency and maintains data integrity - a critical capability for real-time systems requiring uninterrupted access to configuration or status data during firmware updates.
Is AT49BV162A-70TI compatible with Common Flash Interface (CFI) hosts?
Yes, AT49BV162A-70TI fully supports CFI via a standardized query mode entered by writing 98h to address 55h. Once in CFI mode, the host can read device geometry, timing parameters, command sets, and sector maps from predefined addresses - enabling generic flash drivers (e.g., in U-Boot or Linux MTD) to auto-configure without hard-coded device knowledge.
AT49BV162A-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:
- 16Mbit
- Memory Organization:
- 2M x 8, 1M 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
AT49BV162A-70TI FAQ
1.How can I place an order for AT49BV162A-70TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV162A-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 AT49BV162A-70TI reliable?
The price and inventory of AT49BV162A-70TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV162A-70TI is usually 5 days.
3.What payment methods are accepted for AT49BV162A-70TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV162A-70TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV162A-70TI?
AT49BV162A-70TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV162A-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 AT49BV162A-70TI?
For technical support, including AT49BV162A-70TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV162A-70TI requirements.
6.How does Aetrix verify that AT49BV162A-70TI is sourced from the original manufacturer or authorized distributors?
All AT49BV162A-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 AT49BV162A-70TI meets industry standards.
7.What is the process for return or replacement of AT49BV162A-70TI?
All AT49BV162A-70TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV162A-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 AT49BV162A-70TI part is unused and in its original packaging.
Return procedure for AT49BV162A-70TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV162A-70TI Tags
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