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Cypress Semiconductor CY7B9910 Bedienungsanleitung Seite 4

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Seitenansicht 3
CY7B9910
CY7B9920
4
AC Test Loads and Waveforms
7B9910–3
7B9910–4
TTL AC Test Load (CY7B9910) TTL Input Test Waveform (Cy7B9910)
5V
R1
R2
C
L
R1
R2
C
L
7B9910–5
CMOS AC Test Load (CY7B9920)
3.0V
2.0V
V
th
=1.5V
0.8V
0.0V
≤
1ns
≤
1ns
2.0V
0.8V
V
th
=1.5V
80%
V
th
=V
CC
/2
20%
0.0V
≤
3ns
≤
3ns
80%
20%
V
th
=V
CC
/2
7B9910–6
CMOS Input Test Waveform (CY7B9920)
V
CC
R1=130
R2=91
C
L
=50pF(C
L
= 30pF for –5 and –2 devices)
(Includes fixture and probe capacitance)
R1=100
R2=100
C
L
=50pF(C
L
=30 pF for –5 and –2devices)
(Includes fixture and probe capacitance)
V
CC
Switching Characteristics
Over the Operating Range
[7]
CY7B9910–2
[8]
CY7B9920–2
[8]
Parameter Description Min. Typ. Max. Min. Typ. Max. Unit
f
NOM
Operating Clock
Frequency in MHz
FS = LOW
[9, 10]
15 30 15 30 MHz
FS = MID
[9, 10]
25 50 25 50
FS = HIGH
[9, 10, 11]
40 80 40 80
[12]
t
RPWH
REF Pulse Width HIGH 5.0 5.0 ns
t
RPWL
REF Pulse Width LOW 5.0 5.0 ns
t
SKEW
Zero Output Skew (All Outputs)
[13, 14]
0.1 0.25 0.1 0.25 ns
t
DEV
Device-to-Device Skew
[14, 15]
0.75 0.75 ns
t
PD
Propagation Delay, REF Rise to FB Rise –0.25 0.0 +0.25 –0.25 0.0 +0.25 ns
t
ODCV
Output Duty Cycle Variation
[16]
–0.65 0.0 +0.65 –0.65 0.0 +0.65 ns
t
ORISE
Output Rise Time
[17, 18]
0.15 1.0 1.2 0.5 2.0 2.5 ns
t
OFALL
Output Fall Time
[17, 18]
0.15 1.0 1.2 0.5 2.0 2.5 ns
t
LOCK
PLL Lock Time
[19]
0.5 0.5 ms
t
JR
Cycle-to-Cycle Output Jitter Peak to Peak 200 200 ps
RMS 25 25 ps
CY7B9910–5 CY7B9920–5
Parameter Description Min. Typ. Max. Min. Typ. Max. Unit
f
NOM
Operating Clock
Frequency in MHz
FS = LOW
[9, 10]
15 30 15 30 MHz
FS = MID
[9, 10]
25 50 25 50
FS = HIGH
[9, 10, 11]
40 80 40 80
[12]
t
RPWH
REF Pulse Width HIGH 5.0 5.0 ns
t
RPWL
REF Pulse Width LOW 5.0 5.0 ns
t
SKEW
Zero Output Skew (All Outputs)
[13, 14]
0.25 0.5 0.25 0.5 ns
t
DEV
Device-to-Device Skew
[8, 15]
1.0 1.0 ns
t
PD
Propagation Delay, REF Rise to FB Rise –0.5 0.0 +0.5 –0.5 0.0 +0.5 ns
t
ODCV
Output Duty Cycle Variation
[16]
–1.0 0.0 +1.0 –1.0 0.0 +1.0 ns
t
ORISE
Output Rise Time
[17, 18]
0.15 1.0 1.5 0.5 2.0 3.0 ns
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