CY7C4205V Ver la hoja de datos (PDF) - Cypress Semiconductor
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CY7C4205V Datasheet PDF : 20 Pages
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CY7C4225V/4205V/4215V
CY7C4425V/4235V/4245V
AC Test Loads and Waveforms[9, 10]
3.3V
OUTPUT
R1 = 330Ω
CL
INCLUDING
JIG AND
SCOPE
R2 = 510Ω
3.0V
GND
≤ 3 ns
ALL INPUT PULSES
90%
10%
90%
10%
≤ 3 ns
Equivalent to:
THÉVENIN EQUIVALENT
Rth = 200Ω
OUTPUT
Vth = 2.0V
Switching Characteristics Over the Operating Range
Parameter
Description
tS
Clock Cycle Frequency
tA
Data Access Time
tCLK
Clock Cycle Time
tCLKH
Clock HIGH Time
tCLKL
Clock LOW Time.
tDS
Data Set-up Time
tDH
Data Hold Time
tENS
Enable Set-up Time
tENH
tRS
Enable Hold Time
Reset Pulse Width[11]
tRSR
Reset Recovery Time
tRSF
Reset to Flag and Output Time
tPRT
Retransmit Pulse Width
tRTR
tOLZ
Retransmit Recovery Time
Output Enable to Output in Low Z[12]
tOE
tOHZ
Output Enable to Output Valid
Output Enable to Output in High Z[12]
tWFF
Write Clock to Full Flag
tREF
tPAFasynch
Read Clock to Empty Flag
Clock to Programmable Almost-Full Flag[13]
(Asynchronous mode, VCC/SMODE tied to VCC)
tPAFsynch
tPAEasynch
Clock to Programmable Almost-Full Flag
(Synchronous mode, VCC/SMODE tied to VSS)
Clock to Programmable Almost-Empty Flag[13]
(Asynchronous mode, VCC/SMODE tied to VCC)
tPAEsynch
Clock to Programmable Almost-Full Flag
(Synchronous mode, VCC/SMODE tied to VSS)
tHF
Clock to Half-Full Flag
Notes:
9. CL = 30 pF for all AC parameters except for tOHZ.
10. CL = 5 pF for tOHZ.
11. Pulse widths less than minimum values are not allowed.
12. Values guaranteed by design, not currently tested.
13. tPAFasynch, tPAEasynch, after program register write will not be valid until 5 ns + tPAF(E).
7C42X5V-15
Min. Max.
66.7
2
11
15
6
6
4
1
4
1
15
10
18
15
15
0
3
8
3
8
11
11
18
11
18
11
16
7C42X5V-25
Min. Max.
40
2
15
25
10
10
6
2
6
2
25
15
25
25
25
0
3
12
3
12
15
15
22
15
22
15
20
7C42X5V-35
Min. Max.
28.6
2
20
35
14
14
7
2
7
2
35
20
35
35
35
0
3
15
3
15
20
20
25
20
25
20
25
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Document #: 38-06029 Rev. *C
Page 9 of 20
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