Cypress CY2048WAF - Manual (Page 5)

CY2048WAF
Document #: 38-07738 Rev. *A Page 5 of 7
Timing Parameters over the operating range
Parameter Description Min. Max. Unit
T
STP,SYNC
Time from falling edge on PD# to stopped output, synchronous mode, T=1/F
out
1.5T + 350 ns
T
STP,ASYNC
Time from falling edge on PD# to stopped output, asynchronous mode 350 ns
T
PU,SYNC
Time from rising edge on PD# to output at valid frequency, synchronous mode,
T = 1/F
out
3 ms
T
PU,ASYNC
Time from rising edge on PD# to output at valid frequency, asynchronous mode 3 ms
T
PZX,SYNC
Time from rising edge on OE to running output, synchronous mode, T=1/F
out
1.5T + 350 ns
T
PZX,ASYNC
Time from rising edge on OE to running output, asynchronous mode 350 ns
T
PXZ,SYNC
Time from falling edge on OE to high impedance output, synchronous mode,
T = 1/F
out
1.5T + 350 ns
T
PXZ,ASYNC
Time from falling edge on OE to high impedance output, asynchronous mode 350 ns
Figure 2. Power-down Timing
CLOCK
ASYNC
CLOCK
SYNC
PD
T
T
STP
T
PU
T
STP
Weakly pulled LOW
Weakly pulled LOW
CLOCK
ASYNC
CLOCK
SYNC
OE
T
T
PZX
T
PZX
Weakly pulled LOW
Weakly pulled LOW
T
PXZ
T
PXZ
Figure 3. Output Enable Timing
t
RAMP
T
S
V
DD
- 10%
0V
POWER
OUT
Figure 4. VDD Power-up Timing
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