AT45DB081B-RI Atmel, AT45DB081B-RI Datasheet - Page 14
![IC FLASH 8MBIT 20MHZ 28SOIC](/photos/6/82/68295/453-28-soic_sml.jpg)
AT45DB081B-RI
Manufacturer Part Number
AT45DB081B-RI
Description
IC FLASH 8MBIT 20MHZ 28SOIC
Manufacturer
Atmel
Datasheet
1.AT45DB081B-CC.pdf
(33 pages)
Specifications of AT45DB081B-RI
Format - Memory
FLASH
Memory Type
DataFLASH
Memory Size
8M (4096 pages x 264 bytes)
Speed
20MHz
Interface
SPI, 3-Wire Serial
Voltage - Supply
2.7 V ~ 3.6 V
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Input Test Waveforms and Measurement Levels
Output Test Load
AC Waveforms
Waveform 1 – Inactive Clock Polarity Low and SPI Mode 0
Waveform 2 – Inactive Clock Polarity High and SPI Mode 3
14
AT45DB081B
SCK
SCK
SO
SO
CS
CS
SI
SI
t
Two different timing diagrams are shown below. Waveform 1 shows the SCK signal being low
when CS makes a high-to-low transition, and Waveform 2 shows the SCK signal being high
when CS makes a high-to-low transition. Both waveforms show valid timing diagrams. The setup
and hold times for the SI signal are referenced to the low-to-high transition on the SCK signal.
Waveform 1 shows timing that is also compatible with SPI Mode 0, and Waveform 2 shows tim-
ing that is compatible with SPI Mode 3.
R
, t
HIGH IMPEDANCE
HIGH Z
F
< 3 ns (10% to 90%)
t
CSS
t
t
SU
t
V
CSS
t
DRIVING
SU
LEVELS
AC
t
VALID IN
WL
VALID IN
0.45V
VALID OUT
2.4V
t
WH
t
WH
t
t
V
HO
DEVICE
UNDER
TEST
t
H
t
H
t
WL
VALID OUT
2.0
0.8
30 pF
t
HO
AC
MEASUREMENT
LEVEL
t
CSH
t
CSH
HIGH IMPEDANCE
HIGH IMPEDANCE
t
t
t
t
DIS
DIS
CS
CS
2225J–DFLSH–2/08