Specifications

91
AT83SND2CMP3
7524D–MP3–07/07
External Clock Drive and Logic Level References
Definition of symbols Table 67. External Clock Timing Symbol Definitions
Timings Table 68. External Clock AC Timings
V
DD
= 2.7 to 3.3 V, T
A
= -40 to +85°C
Waveforms Figure 91. External Clock Waveform
Figure 92. AC Testing Input/Output Waveforms
Note: 1. During AC testing, all inputs are driven at V
DD
-0.5 V for a logic 1 and 0.45 V for a
logic 0.
2. Timing measurements are made on all outputs at V
IH
min for a logic 1 and V
IL
max for
a logic 0.
Figure 93. Float Waveforms
Signals Conditions
C Clock H High
L Low
X No Longer Valid
Symbol Parameter Min Max Unit
T
CLCL
Clock Period 50 ns
T
CHCX
High Time 10 ns
T
CLCX
Low Time 10 ns
T
CLCH
Rise Time 3 ns
T
CHCL
Fall Time 3 ns
T
CR
Cyclic Ratio in X2 mode 40 60 %
0.45 V
T
CLCL
V
DD
- 0.5
V
IH1
V
IL
T
CHCX
T
CLCH
T
CHCL
T
CLCX
0.45 V
V
DD
- 0.5
0.7 V
DD
0.3 V
DD
V
IH
min
V
IL
max
INPUTS OUTPUTS
V
LOAD
V
OH
- 0.1 V
V
OL
+ 0.1 V
V
LOAD
+ 0.1 V
V
LOAD
- 0.1 V
Timing Reference Points