CY7C4425/4205/4215
CY7C4225/4235/4245
Capacitance
[7]
Parameter
C
IN
C
OUT
Description
Input Capacitance
Output Capacitance
Test Conditions
T
A
= 25
°
C, f = 1 MHz,
V
CC
= 5.0V
Max.
5
7
Unit
pF
pF
AC Test Loads and Waveforms
[8, 9]
R11.1K
Ω
5V
OUTPUT
C
L
INCLUDING
JIG AND
SCOPE
Equivalent to:
THÉ
EVENIN
OUTPUT
EQUIVALENT
410Ω
1.91V
R2
680Ω
3.0V
GND
< 3 ns
ALL INPUT PULSES
90%
10%
90%
10%
< 3 ns
42X5–5
42X5–4
Notes:
7. Tested initially and after any design or process changes that may affect these parameters.
8. C
L
= 30 pF for all AC parameters except for t
OHZ
.
9. C
L
= 5 pF for t
OHZ
.
Switching Characteristics
Over the Operating Range
7C42X5-10
Parameter
t
S
t
A
t
CLK
t
CLKH
t
CLKL
t
DS
t
DH
t
ENS
t
ENH
t
RS
t
RSR
t
RSF
t
PRT
t
RTR
t
OLZ
t
OE
t
OHZ
t
WFF
t
REF
t
PAFasynch
Description
Clock Cycle Frequency
Data Access Time
Clock Cycle Time
Clock HIGH Time
Clock LOW Time
Data Set-Up Time
Data Hold Time
Enable Set-Up Time
Enable Hold Time
Reset Pulse Width
[10]
Reset Recovery Time
Reset to Flag and Output Time
Retransmit Pulse Width
Retransmit Recovery Time
Output Enable to Output in Low Z
[11]
Output Enable to Output Valid
Output Enable to Output in High Z
[12]
Write Clock to Full Flag
Read Clock to Empty Flag
Clock to Programmable Almost-Full Flag
[12]
(Asynchronous mode, V
CC
/SMODE tied to V
CC
)
12
12
0
3
3
7
7
8
8
12
2
10
4.5
4.5
3
0.5
3
0.5
10
8
10
15
15
0
3
3
8
8
10
10
16
Min.
Max.
100
8
2
15
6
6
4
1
4
1
15
10
15
25
25
0
3
3
12
12
15
15
20
7C42X5-15
Min.
Max.
66.7
10
2
25
10
10
6
1
6
1
25
15
25
35
35
0
3
3
15
15
20
20
25
7C42X5-25
Min.
Max.
40
15
2
35
14
14
7
2
7
2
35
20
35
7C42X5-35
Min.
Max. Unit
28.6
20
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
5
CYPRESS [ CYPRESS SEMICONDUCTOR ]
