AT25DF081A-SSH-B

AT25DF081A-SSH-B Datasheet


Atmel AT25DF081A

Part Datasheet
AT25DF081A-SSH-B AT25DF081A-SSH-B AT25DF081A-SSH-B (pdf)
Related Parts Information
AT25DF081A-SH-B AT25DF081A-SH-B AT25DF081A-SH-B
AT25DF081A-MH-Y AT25DF081A-MH-Y AT25DF081A-MH-Y
AT25DF081A-SSH-T AT25DF081A-SSH-T AT25DF081A-SSH-T
AT25DF081A-MH-T AT25DF081A-MH-T AT25DF081A-MH-T
AT25DF081A-SH-T AT25DF081A-SH-T AT25DF081A-SH-T
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• Single 2.7V - 3.6V Supply
• Serial Peripheral Interface SPI Compatible

Supports SPI Modes 0 and 3 Supports RapidS Operation Supports Dual-Input Program and Dual-Output Read
• Very High Operating Frequencies 100MHz for RapidS 85MHz for SPI Clock-to-Output tV of 5ns Maximum
• Flexible, Optimized Erase Architecture for Code + Data Storage Applications Uniform 4-Kbyte Block Erase Uniform 32-Kbyte Block Erase Uniform 64-Kbyte Block Erase Full Chip Erase
• Individual Sector Protection with Global Protect/Unprotect Feature 16 Sectors of 64-Kbytes Each
• Hardware Controlled Locking of Protected Sectors via WP Pin
• Sector Lockdown Make Any Combination of 64-Kbyte Sectors Permanently Read-Only
• 128-Byte Programmable OTP Security Register
• Flexible Programming Byte/Page Program 1- to 256-Bytes
• Fast Program and Erase Times 1.0ms Typical Page Program 256 Bytes Time 50ms Typical 4-Kbyte Block Erase Time 250ms Typical 32-Kbyte Block Erase Time 400ms Typical 64-Kbyte Block Erase Time
• Automatic Checking and Reporting of Erase/Program Failures
• Software Controlled Reset
• JEDEC Standard Manufacturer and Device ID Read Methodology
• Low Power Dissipation 5mA Active Read Current Typical at 20MHz 5µA Deep Power-Down Current Typical
• Endurance 100,000 Program/Erase Cycles
• Data Retention 20 Years
• Complies with Full Industrial Temperature Range
• Industry Standard Green Pb/Halide-free/RoHS Compliant Package Options 8-lead SOIC 150-mil and 208-mil wide 8-pad Ultra Thin DFN 5 x 6 x 0.6mm
8-Mbit 2.7V Minimum Serial Peripheral Interface Serial Flash Memory

Atmel AT25DF081A

The AT25DF081A is a serial interface Flash memory device designed for use in a wide variety of high-volume consumer based applications in which program code is shadowed from Flash memory into embedded or external RAM for execution. The flexible erase architecture of the AT25DF081A, with its erase granularity as small as 4-Kbytes, makes it ideal for data storage as well, eliminating the need for additional data storage EEPROM devices.

The physical sectoring and the erase block sizes of the AT25DF081A have been optimized to meet the needs of today's code and data storage applications. By optimizing the size of the physical sectors and erase blocks, the memory space can be used much more efficiently. Because certain code modules and data storage segments must reside by themselves in their own protected sectors, the wasted and unused memory space that occurs with large sectored and large block erase Flash memory devices can be greatly reduced. This increased memory space efficiency allows additional code routines and data storage segments to be added while still maintaining the same overall device density.

The AT25DF081A also offers a sophisticated method for protecting individual sectors against erroneous or malicious program and erase operations. By providing the ability to individually protect and unprotect sectors, a system can unprotect a specific sector to modify its contents while keeping the remaining sectors of the memory array securely protected. This is useful in applications where program code is patched or updated on a subroutine or module basis, or in applications where data storage segments need to be modified without running the risk of errant modifications to the program code segments. In addition to individual sector protection capabilities, the AT25DF081A incorporates Global Protect and Global Unprotect features that allow the entire memory array to be either protected or unprotected all at once. This reduces overhead during the manufacturing process since sectors do not have to be unprotected one-by-one prior to initial programming.

To take code and data protection to the next level, the AT25DF081A incorporates a sector lockdown mechanism that allows any combination of individual 64-Kbyte sectors to be locked down and become permanently read-only. This addresses the need of certain secure applications that require portions of the Flash memory array to be permanently protected against malicious attempts at altering program code, data modules, security information, or encryption/decryption algorithms, keys, and routines. The device also contains a specialized OTP One-Time Programmable Security Register that can be used for purposes such as unique device serialization, system-level Electronic Serial Number ESN storage, locked key storage, etc.

Specifically designed for use in 3-volt systems, the AT25DF081A supports read, program, and erase operations with a supply voltage range of 2.7V to 3.6V. No separate voltage is required for programming and erasing.
2 Atmel AT25DF081A

Atmel AT25DF081A

Pin Descriptions and Pinouts

Table Pin Descriptions

Symbol CS SCK SI SIO

SO SOI WP HOLD

Name and Function

CHIP SELECT Asserting the CS pin selects the device. When the CS pin is deasserted, the device will be deselected and normally be placed in standby mode not Deep PowerDown mode , and the SO pin will be in a high-impedance state. When the device is deselected, data will not be accepted on the SI pin.

A high-to-low transition on the CS pin is required to start an operation, and a low-to-high transition is required to end an operation. When ending an internally self-timed operation such as a program or erase cycle, the device will not enter the standby mode until the completion of the operation.

SERIAL CLOCK This pin is used to provide a clock to the device and is used to control the flow of data to and from the device. Command, address, and input data present on the SI pin is always latched in on the rising edge of SCK, while output data on the SO pin is always clocked out on the falling edge of SCK.

SERIAL INPUT SERIAL INPUT/OUTPUT The SI pin is used to shift data into the device. The SI pin is used for all data input including command and address sequences. Data on the SI pin is always latched in on the rising edge of SCK.

With the Dual-Output Read Array command, the SI pin becomes an output pin SIO to allow two bits of data on the SO and SIO pins to be clocked out on every falling edge of SCK. To maintain consistency with SPI nomenclature, the SIO pin will be referenced as SI throughout the document with exception to sections dealing with the Dual-Output Read Array command in which it will be referenced as SIO.

Data present on the SI pin will be ignored whenever the device is deselected CS is deasserted .

SERIAL OUTPUT SERIAL OUTPUT/INPUT The SO pin is used to shift data out from the device. Data on the SO pin is always clocked out on the falling edge of SCK.

With the Dual-Input Byte/Page Program command, the SO pin becomes an input pin SOI to allow two bits of data on the SOI and SI pins to be clocked in on every rising edge of SCK. To maintain consistency with SPI nomenclature, the SOI pin will be referenced as SO throughout the document with exception to sections dealing with the Dual-Input Byte/Page Program command in which it will be referenced as SOI.

The SO pin will be in a high-impedance state whenever the device is deselected CS is deasserted .

WRITE PROTECT The WP pin controls the hardware locking feature of the device. Please refer to “Protection Commands and Features” on page 17 for more details on protection features and the WP pin.

The WP pin is internally pulled-high and may be left floating if hardware controlled protection will not be used. However, it is recommended that the WP pin also be externally connected to VCC whenever possible.

HOLD The HOLD pin is used to temporarily pause serial communication without deselecting or resetting the device. While the HOLD pin is asserted, transitions on the SCK pin and data on the SI pin will be ignored, and the SO pin will be in a high-impedance state.

The CS pin must be asserted, and the SCK pin must be in the low state in order for a Hold condition to start. A Hold condition pauses serial communication only and does not have an effect on internally self-timed operations such as a program or erase cycle. Please refer to “Hold” on page 41 for additional details on the Hold operation.

The HOLD pin is internally pulled-high and may be left floating if the Hold function will not be used. However, it is recommended that the HOLD pin also be externally connected to VCC whenever possible.

Asserted State

Type

Input

Input

Input/Output

Output/Input

Input

Input

Table Pin Descriptions Continued

Symbol VCC GND

Name and Function
Ordering Information

Code Detail

Atmel Designator

AT 2 5 D F 0 8 1 A - S H - B

Product Family

Device Density
8 = 8-megabit

Interface
1 = Serial

Shipping Carrier Option

B = Bulk tubes Y = Bulk trays T = Tape and reel

Device Grade

H = Green, NiPdAu lead finish, industrial temperature range -40°C to +85°C

Package Option

SS = 8-lead, wide SOIC S = 8-lead, wide SOIC M = 8-pad, 5 x 6 x 0.6mm UDFN

Green Package Options Pb/Halide-free/RoHS Compliant
Ordering Code

Package Lead Pad Finish Operating Voltage

AT25DF081A-MH-Y AT25DF081A-MH-T
8MA1

AT25DF081A-SSH-B 8S1

AT25DF081A-SSH-T

NiPdAu
2.7V to 3.6V

AT25DF081A-SH-B 8S2

AT25DF081A-SH-T Note The shipping carrier option code is not marked on the devices.

Max. Freq. MHz 100

Operation Range

Industrial -40°C to +85°C
8MA1 8S1 8S2

Package Type 8-pad 5 x 6 x mm Body , Thermally Enhanced Plastic Ultra Thin Dual Flat No Lead Package UDFN 8-lead, Wide, Plastic Gull Wing Small Outline Package JEDEC SOIC 8-lead, Wide, Plastic Gull Wing Small Outline Package EIAJ SOIC
48 Atmel AT25DF081A

Packaging Information
8MA1 UDFN

Pin 1 ID D

Atmel AT25DF081A

C Side View y

Top View

Pin #1 Notch R

Option B

Option A

Pin #1

Chamfer

COMMON DIMENSIONS

Unit of Measure = mm 2

SYMBOL A A1

Bottom View

Notes This package conforms to JEDEC reference MO-229,

Saw Singulation.

The terminal #1 ID is a Laser-marked Feature.

NOTE

Package Drawing Contact:
8MA1, 8-pad 5 x 6 x 0.6mm Body , Thermally Enhanced Plastic Ultra Thin Dual Flat No Lead Package UDFN
8MA1
8S1 JEDEC SOIC

TOP VIEW

END VIEW
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Datasheet ID: AT25DF081A-SSH-B 518903