My Inquiry
My Account
Microchip Technology AT49BV161T-90TI
- Part No.:
- AT49BV161T-90TI
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 48-TFSOP (0.724", 18.40mm Width)
- Datasheet:
-
AT49BV161T-90TI.pdf
- Description:
- IC FLASH 16MBIT PARALLEL 48TSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,906
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
AT49BV161T-90TI from Microchip Technology (formerly Atmel) is a 16-Mbit (1M × 16 / 2M × 8) single-supply 3.0V Flash memory IC used for nonvolatile code and data storage in embedded systems. It supports byte/word programming, sector erase with 39 sectors (31 × 64KB + 8 × 8KB), 70 ns access time, and features RDY/BUSY pin, suspend/resume, and 128-bit protection register - deployed in industrial controllers, BIOS firmware, and boot memory applications.
For engineers reviewing the AT49BV161T-90TI datasheet, AT49BV161T-90TI pinout, AT49BV161T-90TI application, or AT49BV161T-90TI equivalent, this page delivers verified technical context, real-world design meaning of specifications, validated pin functions, confirmed alternatives, and supply-ready procurement guidance - all grounded in the official 1427L–FLASH–02/03 datasheet.
Technical Context
This device implements a command-register-based Flash architecture with internal state machine control for program/erase operations. It uses dual-voltage operation: VCC (2.65–3.3V) for logic and I/O, with optional VPP (5V or 12V) acceleration for faster programming/erasing. The BYTE pin enables dynamic x8/x16 mode selection, distinguishing it from fixed-word AT49BV160T variants.
It integrates hardware data protection (VCC sense, noise filtering, CE/OE/WE inhibit), sector lockdown, and status reporting via I/O pins (I/O3, I/O5, I/O6, I/O7) plus dedicated open-drain RDY/BUSY output. Erase suspend/resume and program suspend/resume allow concurrent read/program operations across non-conflicting sectors - critical for real-time firmware updates without system halt.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Memory Density | 16 Mbit (1,048,576 × 16-bit or 2,097,152 × 8-bit) - supports full BIOS or bootloader image storage in compact footprint. |
| Access Time | 90 ns (max) - ensures compatibility with legacy 8051, ARM7, and FPGA-based controllers requiring sub-100 ns read latency. |
| Supply Voltage | 2.65V to 3.3V - enables direct integration into 3.3V-only systems without level-shifting or auxiliary regulators. |
| Sector Architecture | 39 sectors: 31 × 64KB + 8 × 8KB - allows fine-grained firmware partitioning (e.g., lock boot sector, update application sector). |
| Program Time | 20 µs per word - reduces field firmware update duration; accelerated further with VPP = 5V/12V. |
| Erase Time | 300 ms per sector - predictable timing for deterministic update sequences; chip erase not supported if any sector is locked down. |
| Standby Current | 10 µA - meets low-power requirements for battery-backed or energy-harvested edge devices. |
Pinout & Package
AT49BV161T-90TI is available in 48-lead TSOP Type I (JEDEC MO-142AA) and 48-ball CBGA (Microchip SGBA-48) packages. Pin functions are identical across both packages per datasheet Rev. 1427L–FLASH–02/03.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A19 | Address Inputs | 20-bit address bus supporting full 1M-word addressing; A-1 alias on I/O15 in byte mode. |
| I/O0–I/O15 | Data I/O (x16) / I/O0–I/O7 + A-1 (x8) | Configurable data bus: BYTE = 1 → x16 mode (I/O0–I/O15 active); BYTE = 0 → x8 mode (I/O0–I/O7 active, I/O15 = LSB address). |
| CE, OE, WE | Chip Enable, Output Enable, Write Enable | Three-control read/write protocol prevents bus contention; OE high disables outputs regardless of CE/WE state. |
| RDY/BUSY | Open-drain Ready/Busy Output | Active-low signal indicates internal program/erase progress; supports wired-OR of multiple devices on shared bus. |
| VPP | Write Protection & Acceleration Supply | Enables hardware write lockout when <0.8V; enables accelerated programming/erasing at 5V ±0.5V or 12V ±0.5V. |
| RESET | Hardware Initialization Input | Forces device into read/standby mode; required to exit Single Pulse Program Mode or recover from failed operations. |
| BYTE | Word/Byte Mode Select | Logic-high = x16 data path (I/O0–I/O15); logic-low = x8 data path (I/O0–I/O7) with I/O15 repurposed as A-1 address input. |
| VCCQ | Output Driver Power Supply | Separate 2.65–3.3V supply for I/O drivers - allows independent regulation to meet specific VOH/VOL requirements. |
Key Features
| Feature | Design Value |
|---|---|
| Suspend/Resume for Erase & Program | Enables reading from or programming to non-erasing sectors during active erase - eliminates firmware update downtime in real-time systems. |
| Sector Lockdown | Per-sector write-protection activated via command; preserves boot code integrity while allowing application updates - no hardware fuses required. |
| 128-bit Protection Register | Factory-programmed 64-bit block A + user-programmable/lockable 64-bit block B - supports secure key storage and anti-cloning in trusted boot designs. |
| Hardware Data Protection | VCC sense, 15 ns noise filter on WE/CE, and VPP voltage validation prevent spurious writes - critical for automotive and industrial environments. |
| Single-Pulse Program Mode | Reduces software overhead: after 6-byte entry sequence, only single WE pulse needed per byte/word - accelerates mass programming in production. |
Applications
| Industrial PLC Firmware Storage | Embedded BIOS Boot Memory |
|---|---|
|
Use Scenario: Storing and updating ladder logic firmware in programmable logic controllers operating in harsh factory environments. IC Role / Device Role / Timing Role: Nonvolatile boot and application code storage with sector lockdown protecting startup routines. Use Value: 300 ms sector erase + suspend/resume enables live firmware patching without halting I/O scanning cycles. |
Use Scenario: Holding UEFI/BIOS code in x86-based industrial motherboards requiring fast, reliable boot initialization. IC Role / Device Role / Timing Role: Primary boot memory mapped at reset vector; accessed via 16-bit bus with 90 ns read latency. Use Value: RDY/BUSY pin and Data Polling (I/O7) simplify timing-critical boot ROM handshaking without external wait-state logic. |
| Medical Device Configuration Storage | Telecom Base Station Bootloader |
|
Use Scenario: Retaining calibrated sensor parameters and safety-critical configuration profiles in portable diagnostic equipment. IC Role / Device Role / Timing Role: Secure parameter storage using 128-bit protection register (block B locked) and sector lockdown. Use Value: Hardware-level write protection (VPP & sector lockdown) prevents accidental corruption during field recalibration procedures. |
Use Scenario: Hosting redundant bootloader images in LTE/5G remote radio units requiring zero-downtime field upgrades. IC Role / Device Role / Timing Role: Dual-image storage across protected and updatable sectors; BYTE pin enables flexible interface to 8-bit or 16-bit host buses. Use Value: 20 µs word program time + VPP acceleration reduces OTA upgrade window - critical for carrier-grade SLA compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Flash memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SST39VF1601C-90-4C-EKE | 16 Mbit, 3.0V, 90 ns access, 512K × 32 organization; lacks RDY/BUSY pin and suspend/resume; uses different command set. | No sector erase suspend capability - requires full system stall during erase; no 128-bit protection register. | Choose for cost-sensitive, non-real-time applications where firmware update concurrency is unnecessary. |
| MX29LV160ETTI-90G | 16 Mbit, 3.0V, 90 ns access, same 1M × 16 organization; includes RDY/BUSY but no BYTE pin - fixed x16 mode only. | Cannot operate in x8 mode; lacks 128-bit protection register and sector lockdown override via RESET. | Choose when x16 interface is fixed and enhanced security features are not required; pinout differs (no BYTE, different VPP handling). |
Compared with SST39VF1601C-90-4C-EKE and MX29LV160ETTI-90G, AT49BV161T-90TI uniquely combines byte/word mode flexibility, hardware-accelerated erase/program, and multi-layer security (sector lockdown + 128-bit register), making it optimal for safety-critical, upgradable embedded systems.
Availability
AT49BV161T-90TI is available at Aetrix Electronics and suitable for industrial PLCs, medical diagnostics, telecom base stations, and embedded BIOS requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for AT49BV161T-90TI 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 support for the AT49BV/LV16X(T) Flash family, including documentation, errata, and long-term manufacturing commitments.
The AT49BV161T-90TI belongs to Microchip's legacy parallel-interface Flash memory product line, designed specifically for in-system programmable boot and firmware storage in resource-constrained 3.3V embedded systems.
FAQ
What is the maximum access time specification for AT49BV161T-90TI?
The AT49BV161T-90TI has a guaranteed maximum access time of 90 ns under specified conditions (VCC = 2.65–3.3V, TA = -40°C to +85°C). This value is measured from address valid to valid data output with CE and OE asserted, and defines the minimum clock period for synchronous read interfaces. The "-90" suffix in the part number explicitly denotes this 90 ns speed grade.
Does AT49BV161T-90TI support both x8 and x16 data bus configurations?
Yes, AT49BV161T-90TI supports configurable x8/x16 operation via the BYTE pin. When BYTE = HIGH, it operates in 16-bit mode with I/O0–I/O15 active. When BYTE = LOW, it operates in 8-bit mode with I/O0–I/O7 active and I/O15 repurposed as the A-1 address input - enabling seamless integration with either 8-bit or 16-bit microcontrollers without external glue logic.
How does the RDY/BUSY pin function on AT49BV161T-90TI?
The RDY/BUSY pin on AT49BV161T-90TI is an open-drain output that is actively pulled low during internal program or erase operations and released (high-impedance) upon completion. It supports wired-OR connection with other devices on the same bus, allowing centralized status monitoring. Unlike status bits on I/O lines, RDY/BUSY requires only one dedicated signal line and no polling overhead.
Can AT49BV161T-90TI be programmed using only the VCC supply, or is VPP required?
AT49BV161T-90TI can be fully programmed and erased using only the VCC supply (2.65–3.3V); VPP is optional. When VPP is ≤ VCC, the device uses VCC for programming/erasing. When VPP is set to 5V ±0.5V or 12V ±0.5V, it accelerates program/erase times - but VPP is never mandatory. Leaving VPP unconnected is invalid; it must be tied to VSS or appropriate voltage per datasheet guidelines.
What happens to sector lockdown status after a power cycle on AT49BV161T-90TI?
Sector lockdown on AT49BV161T-90TI is volatile: all sectors are unlocked at power-up or RESET assertion. Lockdown state is not retained across power cycles - it must be re-applied by software after each boot. This design prevents permanent loss of update capability and allows recovery from corrupted lockdown commands, aligning with fail-safe firmware update requirements in certified systems.
AT49BV161T-90TI 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:
- 90 ns
- Voltage - Supply:
- 2.65V ~ 3.3V
- Operating Temperature:
- -40°C ~ 85°C (TC)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-TSOP
AT49BV161T-90TI FAQ
1.How can I place an order for AT49BV161T-90TI through Aetrix?
Please submit a Request for Quotation (RFQ) for AT49BV161T-90TI 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 AT49BV161T-90TI reliable?
The price and inventory of AT49BV161T-90TI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AT49BV161T-90TI is usually 5 days.
3.What payment methods are accepted for AT49BV161T-90TI?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AT49BV161T-90TI transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AT49BV161T-90TI?
AT49BV161T-90TI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AT49BV161T-90TI 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 AT49BV161T-90TI?
For technical support, including AT49BV161T-90TI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AT49BV161T-90TI requirements.
6.How does Aetrix verify that AT49BV161T-90TI is sourced from the original manufacturer or authorized distributors?
All AT49BV161T-90TI 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 AT49BV161T-90TI meets industry standards.
7.What is the process for return or replacement of AT49BV161T-90TI?
All AT49BV161T-90TI units undergo pre-shipment inspection (PSI). If there is an issue with AT49BV161T-90TI, 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 AT49BV161T-90TI part is unused and in its original packaging.
Return procedure for AT49BV161T-90TI:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
AT49BV161T-90TI 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…
