AT25SF161B-SHB-T

AT25SF161B-SHB-T is a Microchip/Atmel 16-Mbit SPI Serial Flash memory. It provides non-volatile storage for embedded systems, accessible over a standard SPI bus.
Key points
- Capacity and organization: 16 Mbit (2 MBytes) of storage; typical page size 256 bytes; memory organized in sectors and blocks (e.g., 4 KB sectors, 64 KB blocks).
- Interface: SPI (CS, SCK, SI, SO); uses 3-byte addressing for this size.
- Operations: Read (standard and fast), Page Program (256 bytes per page), Sector/Block Erase, Chip Erase; requires Write Enable Latch (WEL).
- Features: Deep power-down mode, Hold and Write-Protect for data security; status register for busy/ready and protection status.
- Electricals: 2.7–3.6 V supply (commonly 3.3 V); operates over a wide temperature range per the part variant.
- Packaging: -SHB-T indicates a specific package and packaging option (e.g., tape/reel); refer to the datasheet for exact package details.
Use case: boot code, configuration data, or any non-volatile storage in space- and power-constrained embedded systems. For exact timings, voltages, and pinout, consult the AT25SF161B-SHB-T datasheet.

Key features of AT25SF161B-SHB-T:
- 16 Mbit (2 Mbyte) Serial SPI flash memory.
- SPI-compatible interface; standard and fast read modes; up to 40 MHz clock.
- 3-byte address capable (full memory addressing for 16 Mb part).
- 256-byte page program; erase options: 4 KB sectors; 32 KB and 64 KB blocks; chip erase.
- Hardware write protection via WP pin; block protection (BP) in status register.
- Status register with WIP (write in progress) and WEL (write-enable) bits.
- Deep power-down mode for low power consumption; fast wake-up.
- Operating voltage: typically 2.7–3.6 V.
- Temperature range: industrial-grade (≈ -40°C to +85°C).
- 8-pin package (SHB); Tape & Reel variant available (suffix -T).
Note: avoids dual/quad SPI; no ECC or security block features specified beyond standard protection.

Package type: 8-pin SOIC (SHB) package. The -T suffix indicates Tape-and-Reel packaging.

- Pin count: 8 pins
- Function: 16-Mbit serial SPI flash memory (nonvolatile data storage). Interface: SPI with SI (MOSI), SO (MISO), SCK, CS; additional WP (write protect) and HOLD; power and ground are VCC and GND.

- Manufacturer: Atmel Corporation (now part of Microchip Technology).
- What kind of company: A semiconductor company that designs and manufactures integrated circuits, including microcontrollers and memory devices (e.g., serial flash) for embedded systems.

- Firmware/code storage for embedded microcontrollers/SoCs
- Bootloader and firmware-update memory
- Data logging and telemetry in IoT, automotive, and industrial sensors
- Parameter/configuration and asset/lookup-table storage
- Caching/standby memory in space-constrained consumer electronics

Equivalents (16 Mbit, 3V SPI NOR Flash):
- Winbond W25Q16JV / W25Q16BV
- Macronix MX25L1616E (MX25L1616D)
- Micron N25Q161A
- Spansion S25FL016K
- GigaDevice GD25Q16C
- ISSI IS25LP016D
Note: exact package/pinout may differ; verify datasheet cross-reference for your package.