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CY7C331
5
)
AC Test Loads and Waveforms
C331–5
C331–6
90%
10%
3.0V
GND
90%
10%
ALL INPUT PULSES
5V
OUTPUT
INCLUDING
JIG AND
SCOPE
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
(a)
(b)
≤ 5ns
≤ 5 ns
OUTPUT
R1 313
Ω
(470
Ω Mil)
R2 208
Ω
(319
Ω Mil)
125
Ω
Equivalent
to: THÉVENIN EQUIVALENT (Commercial)
R1 313
Ω
(470
Ω Mil)
50pF
R2 208
Ω
(319
Ω Mil)
2.00V=V thc
OUTPUT
190
Ω
Equivalent to: THÉVENIN EQUIVALENT (Military)
2.02V=V thm
C331–7
C331–8
Parameter
VX
Output Waveform—Measurement Level
tPXZ(– )
1.5V
VOH
0.5V
VX
0.5V
tPXZ(+)
2.6V
VOL
VX
tPZX(+)
Vthc
0.5V
tPZX(– )
Vthc
VX
VOL
0.5V
VX
VOH
C331–9
C331–10
C331–11
C331–12
tER(– )
1.5V
VOH
0.5V
VX
0.5V
tER(+)
2.6V
VOL
VX
tEA(+)
Vthc
0.5V
tEA(– )
Vthc
VX
VOL
0.5V
VX
VOH
C331–13
C331–14
C331–15
C331–16
(c) Test Waveforms and Measurement Levels
Switching Characteristics Over the Operating Range[2]
Parameter
Description
Commercial
–20
–25
Min.
Max.
Min.
Max.
Unit
tPD
Input to Output Propagation Delay[7]
20
25
ns
tICO
Input Register Clock to Output Delay[8]
35
40
ns
tIOH
Output Data Stable Time from Input Clock[8]
5
5
ns
tIS
Input or Feedback Set-Up Time to Input Register Clock[8]
2
2
ns
tIH
Input Register Hold Time from Input Clock[8]
11
13
ns
tIAR
Input to Input Register Asynchronous Reset Delay[8]
35
40
ns
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