CY29940 Cypress Semiconductor, CY29940 Datasheet - Page 5

• Manufacturer Part Number: CY29940
• Description: 2.5V or 3.3V/ 200-MHz/ 1:18 Clock Distribution Buffer
• Manufacturer: Cypress Semiconductor

Document #: 38-07283 Rev. *B
PECL_CLK
PECL_CLK
Figure 3. Propagation Delay (TPD) Test Reference
LVCMOS_CLK
Figure 4. LVCMOS Propagation Delay (TPD) Test
Q
Q
Figure 1. LVCMOS_CLK CY29940 Test Reference for V
Z = 50 ohm
Differential
t
Generator
Figure 2. PECL_CLK CY29940 Test Reference for V
PD
t
Pulse
PD
V
Reference
Z = 50 ohm
PP
Generator
Pulse
Zo = 50 ohm
Zo = 50 ohm
Zo = 50 ohm
VTT
GND
R
VCC
VCC /2
GND
VCC
T
R
VCC /2
GND
VCC
V
= 50 ohm
VCC /2
T
CMR
= 50 ohm
CY29940 DUT
VTT
CY29940 DUT
Figure 6. Output-to-Output Skew tsk(0)
Figure 5. Output Duty Cycle (FoutDC)
CC
CC
= 3.3V and V
Zo = 50 ohm
= 3.3V and V
t
P
R
DC = tP / T0 x 100%
Zo = 50 ohm
T
= 50 ohm
R
T
T0
= 50 ohm
CC
CC
VTT
= 2.5V
= 2.5V
VTT
t
SK(0)
GND
VCC
VCC /2
CY29940
Page 5 of 7
VCC
GND
VCC
GND
VCC /2
VCC /2