AC Characteristics
Temperature Range:................................................ -55 +125°C
Supply Voltage: ....................................................... 3.3 +0.3V
Input Pulse Levels:.................................................. GND to 3.0V
Input Rise and Fall Times:....................................... 3ns (10 - 90%)
Input and Output Timing Reference Levels:............ 1.5V
Output Loading IOL/IOH:............................................ See Figure 3
Figure 6. AC Test Loads Waveforms
General
Specific (TWLQZ, TWHQX, TELQX, TEHQZ
TGLQX, TGHQZ)
Write Cycle
Table 4. Write cycle timings(1)
AT68166FT-25
AT68166FT-20
AT68166FT-18
(preliminary)
Symbol
TAVAW
TAVWL
TAVWH
TDVWH
TELWH
TWLQZ
TWLWH
Parameter
min
20
2
max
min
20
2
max
min
18
2
max
Unit
ns
Write cycle time
-
-
-
-
-
-
Address set-up time
Address valid to end of write
Data set-up time
ns
14
9
-
11
8
-
10
7
-
ns
-
-
-
ns
CS low to write end
Write low to high Z(2)
Write pulse width
12
-
-
12
-
-
11
-
-
ns
10
-
10
-
9
-
ns
12
9
9
ns
Address hold from end of
write
TWHAX
0
-
0
-
0
-
ns
TWHDX
TWHQX
Data hold time
2
5
-
-
1
5
-
-
1
5
-
-
ns
ns
Write high to low Z(2)
Notes: 1. Timings figures applicable for 8-bit, 16-bit and 32-bit mode.
2. Parameters guaranteed, not tested, with output loading 5 pF. (See “AC Test Loads Waveforms” on page 10.)
10
AT68166FT
7531H–AERO–04/09
ATMEL [ ATMEL ]
