Switching characteristics – Cypress CY7C1294DV18 User Manual
Page 19
CY7C1292DV18
CY7C1294DV18
Document #: 001-00350 Rev. *A
Page 19 of 23
Switching Characteristics
Over the Operating Range
[22, 23]
Cypress
Parameter
Consortium
Parameter
Description
250 MHz
200 MHz
167 MHz
Unit
Min.
Max.
Min.
Max.
Min.
Max.
t
POWER
t
KHKH
V
DD
(Typical) to the first Access
[24]
1
1
1
ms
t
CYC
t
KHKL
K Clock and C Clock Cycle Time
4.0
6.3
5.0
7.9
6.0
7.9
ns
t
KH
t
KLKH
Input Clock (K/K and C/C) HIGH
1.6
–
2.0
–
2.4
–
ns
t
KL
t
KHKH
Input Clock (K/K and C/C) LOW
1.6
–
2.0
–
2.4
–
ns
t
KHKH
t
KHCH
K Clock Rise to K Clock Rise and C to C Rise
(rising edge to rising edge)
1.8
–
2.2
–
2.7
–
ns
t
KHCH
t
KHKH
K/K Clock Rise to C/C Clock Rise
(rising edge to rising edge)
0.0
1.8
0.0
2.2
0.0
2.7
ns
Set-up Times
t
SA
t
AVKH
Address Set-up to Clock (K/K) Rise
0.35
–
0.4
–
0.5
–
ns
t
SC
t
IVKH
Control Set-up to K Clock Rise (RPS, WPS)
0.35
–
0.4
–
0.5
–
ns
t
SCDDR
t
IVKH
Double Data Rate Control Set-up to Clock
(K/K) Rise (BWS
0
, BWS
1
, BWS
3
, BWS
4
)
0.35
–
0.4
–
0.5
–
ns
t
SD
t
DVKH
D
[X:0]
Set-up to Clock (K/K) Rise
0.35
–
0.4
–
0.5
–
ns
Hold Times
t
HA
t
KHAX
Address Hold after Clock (K/K) Rise
0.35
–
0.4
–
0.5
–
ns
t
HC
t
KHIX
Control Hold after K Clock Rise (RPS, WPS)
0.35
–
0.4
–
0.5
–
ns
t
HCDDR
t
KHIX
Double Data Rate Control Hold after Clock
(K/K) Rise (BWS
0
, BWS
1
, BWS
3
, BWS
4
)
0.35
–
0.4
–
0.5
–
ns
t
HD
t
KHDX
D
[X:0]
Hold after Clock (K/K) Rise
0.35
–
0.4
–
0.5
–
ns
Output Times
t
CO
t
CHQV
C/C Clock Rise (or K/K in Single Clock Mode)
to Data Valid
–
0.45
–
0.45
–
0.50
ns
t
DOH
t
CHQX
Data Output Hold after Output C/C Clock Rise
(Active to Active)
–0.45
–
-0.45
–
-0.50
–
ns
t
CCQO
t
CHCQV
C/C Clock Rise to Echo Clock Valid
–
0.45
–
0.45
–
0.50
ns
t
CQOH
t
CHCQX
Echo Clock Hold after C/C Clock Rise
–0.45
–
–0.45
–
–0.50
–
ns
t
CQD
t
CQHQV
Echo Clock High to Data Valid
–
0.30
–
0.35
–
0.40
ns
t
CQDOH
t
CQHQX
Echo Clock High to Data Invalid
–0.30
–
–0.35
–
–0.40
–
ns
t
CHZ
t
CHQZ
Clock (C/C) Rise to High-Z
(Active to High-Z)
[25,26]
–
0.45
–
0.45
–
0.50
ns
t
CLZ
t
CHQX1
Clock (C/C) Rise to Low-Z
[25,26]
–0.45
–
–0.45
–
–0.50
–
ns
DLL Timing
t
KC Var
t
KC Var
Clock Phase Jitter
–
0.20
–
0.20
–
0.20
ns
t
KC lock
t
KC lock
DLL Lock Time (K, C)
1024
–
1024
–
1024
–
cycles
t
KC Reset
t
KC Reset
K Static to DLL Reset
30
–
30
–
30
–
ns
Notes:
23. All devices can operate at clock frequencies as low as 119 MHz. When a part with a maximum frequency above 133 MHz is operating at a lower clock frequency,
it requires the input timings of the frequency range in which it is being operated and will output data with the output timings of that frequency range.
24. This part has a voltage regulator internally; t
POWER
is the time that the power needs to be supplied above V
DD
minimum initially before a read or write operation
can be initiated.
25. t
CHZ
, t
CLZ
, are specified with a load capacitance of 5 pF as in (b) of AC Test Loads. Transition is measured
± 100 mV from steady-state voltage.
26. At any given voltage and temperature t
CHZ
is less than t
CLZ
and t
CHZ
less than t
CO
.