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CY7C4255V/CY7C4265V
CY7C4275V/CY7C4285V
Document #: 38-06012 Rev. **
Page 5 of 20
AC Test Loads and Waveforms (-15 -25)[8, 9]
AC Test Loads and Waveforms (-10)
3.0V
3.3V
OUTPUT
R1=330
Ω
R2=510
Ω
CL
INCLUDING
JIG AND
SCOPE
GND
90%
10%
90%
10%
≤ 3ns
≤ 3 ns
OUTPUT
2.0V
Equivalent to:
THÉVENIN EQUIVALENT
4275V–4
200
Ω
ALL INPUT PULSES
4287V–5
3.0V
GND
90%
10%
90%
10%
≤ 3ns
≤ 3 ns
ALL INPUT PULSES
4275V–6
I/O
50
Ω
VCC/2
Z0=50
Ω
4275V–7
Switching Characteristics Over the Operating Range
7C4255/65/75/85V
-10
7C4255/65/75/85V
-15
7C4255/65/75/85V
-25
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Unit
tS
Clock Cycle Frequency
100
66.7
40
MHz
tA
Data Access Time
2
8
2
10
2
15
ns
tCLK
Clock Cycle Time
10
15
25
ns
tCLKH
Clock HIGH Time
4.5
6
10
ns
tCLKL
Clock LOW Time
4.5
6
10
ns
tDS
Data Set-Up Time
3.5
4
6
ns
tDH
Data Hold Time
0
0
1
ns
tENS
Enable Set-Up Time
3.5
4
6
ns
tENH
Enable Hold Time
0
0
1
ns
tRS
Reset Pulse Width[10]
10
15
25
ns
tRSR
Reset Recovery Time
8
10
15
ns
tRSF
Reset to Flag and Output Time
10
15
25
ns
tPRT
Retransmit Pulse Width
60
60
60
ns
tRTR
Retransmit Recovery Time
90
90
90
ns
tOLZ
Output Enable to Output in Low Z[11]
0
0
0
ns
tOE
Output Enable to Output Valid
3
7
3
10
3
12
ns
Notes:
8.
CL = 30 pF for all AC parameters except for tOHZ.
9.
CL = 5 pF for tOHZ.
10. Pulse widths less than minimum values are not allowed.
11.
Values guaranteed by design, not currently tested.
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