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CY29940
Document #: 38-07283 Rev. *C
Page 4 of 7
Figure 1. LVCMOS_CLK CY29940 Test Reference for VCC = 3.3V and VCC = 2.5V
Figure 2. PECL_CLK CY29940 Test Reference for VCC = 3.3V and VCC = 2.5V
Figure 3. Propagation Delay (TPD) Test Reference
Figure 4. LVCMOS Propagation Delay (TPD) Test
Reference
Figure 5. Output Duty Cycle (FoutDC)
Figure 6. Output-to-Output Skew tsk(0)
Pulse
Generator
Z = 50 ohm
Zo = 50 ohm
VTT
Zo = 50 ohm
VTT
RT = 50 ohm
RT = 50 ohm
CY29940 DUT
Differential
Pulse
Generator
Z = 50 ohm
Zo = 50 ohm
Zo = 50 ohm
VTT
RT = 50 ohm
CY29940 DUT
Zo = 50 ohm
RT = 50 ohm
VTT
tPD
PECL_CLK
PECL_CLK
VPP
Q
VCMR
VCC
GND
VCC /2
tPD
LVCMOS_CLK
Q
VCC
GND
VCC /2
VCC
GND
VCC /2
VCC
GND
VCC /2
tP
T0
DC = tP / T0 x 100%
tSK(0)
VCC
GND
VCC /2
VCC
GND
VCC /2
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