CY29948 Cypress Semiconductor, CY29948 Datasheet - Page 4

• Manufacturer Part Number: CY29948
• Description: 1:12 Clock Distribution Buffer
• Manufacturer: Cypress Semiconductor

AC Parameters
V
Document Number: 38-07288 Rev. *E
F
T
F
t
t
T
T
T
T
T
Notes
pZL
pLZ
Parameter
6. Parameters are guaranteed by design and characterization. Not 100% tested in production. All parameters specified with loaded outputs.
7. Outputs driving 50 transmission lines.
8. 50% input duty cycle.
9. See
10. Part-to-Part skew at a given temperature and voltage.
11. Setup and hold times are relative to the falling edge of the input clock.
DD
skew
skew(pp)
s
r
max
pd
outDC
h
/T
, t
, t
f
= V
pZH
pHZ
Figure 2
DDC
= 3.3 V ± 10% or 2.5 V ± 5%, over the specified operating range.
Input Frequency
PECL_CLK to Q Delay
TCLK to Q Delay
PECL_CLK to Q Delay
TCLK to Q Delay
Output Duty Cycle
Output Enable Time (all outputs)
Output Disable Time (all outputs)
Output-to-Output Skew
Part-to-Part Skew
Set-up Time
Hold Time
Output Clocks Rise/Fall Time
and
Figure 3 on page
[6]
Figure 2. LVCMOS_CLK CY29948 Test Reference for V
[7, 11]
Description
[7, 11]
Z = 50 ohm
Generator
[7]
[7]
[7]
5.
[10]
Pulse
[7, 8, 9]
[7]
[7]
[7, 9]
[9]
V
V
V
V
Measured at V
PECL_CLK to Q
TCLK to Q
SYNC_OE to PECL_CLK
SYNC_OE to TCLK
PECL_CLK to SYNC_OE
TCLK to SYNC_OE
0.8 V to 2.0 V, V
0.6 V to 1.8 V, V
Zo = 50 ohm
DD
DD
DD
DD
= 3.3 V
= 2.5 V
= 3.3 V
= 2.5 V
R
T
= 50 ohm
Conditions
CY29948 DUT
DD
VTT
DD
DD
/2
= 3.3 V
= 2.5 V
CC
Zo = 50 ohm
= 3.3 V and V
R
T
0.20
0.20
Min
= 50 ohm
4.0
4.4
6.0
6.4
1.0
0.0
0.0
1.0
45
–
–
2
2
–
–
–
VTT
CC
Typ
150
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
= 2.5 V
Max
10.0
10.9
200
170
250
8.0
8.9
1.5
2.0
1.0
1.3
55
10
10
–
–
–
–
CY29948
Unit
MHz
Page 4 of 10
ns
ns
ns
ps
ns
ns
ns
ns
%
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