Cypress CY7C1420AV18 Manual De Usuario
CY7C1416AV18, CY7C1427AV18
CY7C1418AV18, CY7C1420AV18
CY7C1418AV18, CY7C1420AV18
Document Number: 38-05616 Rev. *F
Page 23 of 31
Switching Characteristics
Over the Operating Range
Cypress
Parame-
Parame-
ter
Consor-
tium Pa-
rameter
Description
300 MHz
278 MHz
250 MHz
200 MHz
167 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
t
POWER
V
DD
(Typical) to the First Access
1
–
1
–
1
–
1
–
1
–
ms
t
CYC
t
KHKH
K Clock and C Clock Cycle Time
3.3
8.4
3.6
8.4
4.0
8.4
5.0
8.4
6.0
8.4
ns
t
KH
t
KHKL
Input Clock (K/K and C/C) HIGH
1.32
–
1.4
–
1.6
–
2.0
–
2.4
–
ns
t
KL
t
KLKH
Input Clock (K/K and C/C) LOW
1.32
–
1.4
–
1.6
–
2.0
–
2.4
–
ns
t
KHKH
t
KHKH
K Clock Rise to K Clock Rise and C
to C Rise (rising edge to rising
edge)
to C Rise (rising edge to rising
edge)
1.49
–
1.6
–
1.8
–
2.2
–
2.7
–
ns
t
KHCH
t
KHCH
K/K Clock Rise t o C/C Clock Rise
(rising edge to rising edge)
(rising edge to rising edge)
0.0
1.45
0.0
1.55
0.0
1.8
0.0
2.2
0.0
2.7
ns
Setup Times
t
SA
t
AVKH
Address Setup to K Clock Rise
0.4
–
0.4
–
0.5
–
0.6
–
0.7
–
ns
t
SC
t
IVKH
Control Setup to K Clock Rise
(LD, R/W)
(LD, R/W)
0.4
–
0.4
–
0.5
–
0.6
–
0.7
–
ns
t
SCDDR
t
IVKH
Double Data Rate Control Setup to
Clock (K/K) Rise
(BWS
Clock (K/K) Rise
(BWS
0
, BWS
1
, BWS
2
, BWS
3
)
0.3
–
0.3
–
0.35
–
0.4
–
0.5
–
ns
t
SD
t
DVKH
D
[X:0]
Setup to Clock (K/K) Rise
0.3
–
0.3
–
0.35
–
0.4
–
0.5
–
ns
Hold Times
t
HA
t
KHAX
Address Hold after K Clock Rise
0.4
–
0.4
–
0.5
–
0.6
–
0.7
–
ns
t
HC
t
KHIX
Control Hold after K Clock Rise
(LD, R/W)
(LD, R/W)
0.4
–
0.4
–
0.5
–
0.6
–
0.7
–
ns
t
HCDDR
t
KHIX
Double Data Rate Control Hold
after Clock (K/K) Rise
(BWS
after Clock (K/K) Rise
(BWS
0
, BWS
1
, BWS
2
, BWS
3
)
0.3
–
0.3
–
0.35
–
0.4
–
0.5
–
ns
t
HD
t
KHDX
D
[X:0]
Hold after Clock (K/K) Rise
0.3
–
0.3
–
0.35
–
0.4
–
0.5
–
ns
Notes
21. When a part with a maximum frequency above 167 MHz is operating at a lower clock frequency, it requires the input timings of the frequency range in which it is being
operated and outputs data with the output timings of that frequency range.
22. This part has an internal voltage regulator; t
POWER
is the time that the power is supplied above V
DD
min initially before a read or write operation can be initiated.
23. For DQ2 data signal on CY7C1427AV18 device, t
SD
is 0.5 ns for 200 MHz, 250 MHz, 278 MHz, and 300 MHz frequencies.