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AT25SF081B-SSHB-T
Renesas Electronics Corporation
IC FLASH 8MBIT SPI/QUAD 8SOIC
1809 Pcs New Original In Stock
FLASH - NOR Memory IC 8Mbit SPI - Quad I/O 108 MHz 8-SOIC
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5.0 / 5.0
- (460 Ratings)
AT25SF081B-SSHB-T
Product Overview
9228994
DiGi Electronics Part Number
AT25SF081B-SSHB-T-DGManufacturer
Renesas Electronics Corporation
AT25SF081B-SSHB-T
Description
IC FLASH 8MBIT SPI/QUAD 8SOICInventory
1809 Pcs New Original In Stock
FLASH - NOR Memory IC 8Mbit SPI - Quad I/O 108 MHz 8-SOIC
Quantity
Minimum 1
Minimum 1
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AT25SF081B-SSHB-T Technical Specifications
Category
Memory, Memory
Packaging
Tape & Reel (TR)
Series
-
Product Status
Active
DiGi-Electronics Programmable
Verified
Memory Type
Non-Volatile
Memory Format
FLASH
Technology
FLASH - NOR
Memory Size
8Mbit
Memory Organization
1M x 8
Memory Interface
SPI - Quad I/O
Clock Frequency
108 MHz
Write Cycle Time - Word, Page
50µs, 2.4ms
Voltage - Supply
2.7V ~ 3.6V
Operating Temperature
-40°C ~ 85°C (TC)
Mounting Type
Surface Mount
Package / Case
8-SOIC (0.154", 3.90mm Width)
Supplier Device Package
8-SOIC
Base Product Number
AT25SF081
Datasheet & Documents
HTML Datasheet
AT25SF081B-SSHB-T-DG
Environmental & Export Classification
RoHS Status
ROHS3 Compliant
Moisture Sensitivity Level (MSL)
1 (Unlimited)
REACH Status
REACH Unaffected
ECCN
EAR99
HTSUS
8542.32.0071
Additional Information
Other Names
1265-AT25SF081B-SSHB-TTR
-1415-AT25SF081B-SSHB-TCT
1265-AT25SF081B-SSHB-TDKR
1265-AT25SF081B-SSHB-TCT
Standard Package
4,000
Alternative Parts
PART NUMBER
MANUFACTURER
QUANTITY AVAILABLE
DiGi PART NUMBER
UNIT PRICE
SUBSTITUTE TYPE
Reviews
5.0/5.0-(Show up to 5 Ratings)
de desembre 02, 2025
DiGi Electronics makes it easy to stay within budget while enjoying excellent customer care.
de desembre 02, 2025
I appreciate their diligent approach to inventory control and customer support.
de desembre 02, 2025
Their inventory responsiveness significantly benefits our bulk purchasing needs.
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Frequently Asked Questions (FAQ)
What are the key design-in risks when using the AT25SF081B-SSHB-T in a high-noise industrial environment with long SPI traces?
When integrating the AT25SF081B-SSHB-T in electrically noisy environments, signal integrity on SPI lines is a critical risk due to its 108 MHz clock frequency. Long PCB traces can cause ringing, crosstalk, and timing skew, especially on the IO0–IO3 bidirectional data lines. To mitigate this, use controlled impedance routing, keep traces as short as possible, add series termination resistors (22–47Ω), and consider ground shielding for sensitive signals. Also ensure solid power supply decoupling with a 100nF ceramic capacitor close to the VCC pin to maintain stable 2.7V–3.6V operation under transient loads, preventing spurious writes or read corruption during system operation at up to 85°C.
Can the AT25SF081B-SSHB-T replace the MX25L8006E in an existing embedded design, and what compatibility issues should I watch for?
Yes, the AT25SF081B-SSHB-T can generally substitute for the MX25L8006E (8Mbit SPI NOR Flash) in most applications, but key differences require validation. The AT25SF081B-SSHB-T supports a higher SPI clock frequency (108 MHz vs 80 MHz) and has a different status register configuration and write protection scheme. Ensure your firmware correctly handles the AT25SF081B-SSHB-T’s write enable latch and block protection bits, as misuse could lead to accidental erasure. Additionally, verify timing parameters such as write cycle times (2.4ms max page program) and power-up sequencing, especially if operating near the 2.7V lower supply threshold where MX25L8006E may behave differently.
How does the AT25SF081B-SSHB-T perform in fast boot applications requiring low-latency memory access from power-on?
The AT25SF081B-SSHB-T is suitable for fast boot systems due to its short power-on to standby time and support for Quad I/O mode at 108 MHz, enabling high throughput for XIP (eXecute-In-Place) operation. However, ensure the host processor's SPI controller can initialize and issue read commands within microseconds after stable power and clock are present. To minimize boot latency, use continuous read mode with proper instruction and dummy cycles configured per the AT25SF081B-SSHB-T datasheet. Also confirm that your power supply ramps within the recommended 10ms to avoid entering an undefined state, which could delay initialization and cause boot failure in time-critical embedded applications.
What reliability concerns should be addressed when using the AT25SF081B-SSHB-T in automotive under-hood applications near the 85°C temperature limit?
While the AT25SF081B-SSHB-T is rated for 85°C operation and -40°C to 85°C temperature range, sustained use near the upper limit in under-hood automotive systems increases wear-out risks such as data retention degradation and oxide stress in the NOR Flash cells. Although its MSL 1 rating supports unlimited floor life, thermal cycling can induce mechanical stress on the 8-SOIC package and solder joints. Mitigate risks by derating the device (limiting real-world operation to ≤75°C if possible), minimizing write/erase cycles through proper wear-leveling algorithms in firmware, and validating long-term data retention with periodic read verification—especially for critical configuration or calibration data stored in the 8Mbit (1M x 8) memory array.
What are the implications of using the AT25SF081B-SSHB-T with a 3.3V microcontroller that has 1.8V logic I/O levels on the SPI interface?
The AT25SF081B-SSHB-T requires a 2.7V–3.6V supply and uses voltage level-sensitive inputs, so interfacing directly with a 1.8V-output SPI master violates electrical specifications and risks communication failure or device damage over time. A level shifter (e.g., TXB0108 or NXP PCA9306) must be used on all SPI lines (SCLK, CS#, IO0–IO3) to translate 1.8V logic outputs from the MCU to compatible 3.3V inputs for the AT25SF081B-SSHB-T. Ensure the level shifter is bidirectional for Quad I/O modes and has low propagation delay to maintain signal integrity at high speeds (up to 108 MHz). Alternatively, consider selecting a dual-supply SPI flash that natively supports 1.8V interface, but verify pin and command set compatibility with the AT25SF081B-SSHB-T before redesign.
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AT25SF081B-SSHB-T CAD Models
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