CY29948_11 Datasheet, PDF (5/10 Pages) Cypress Semiconductor – 2.5 V or 3.3 V, 200-MHz, 1:12 Clock Distribution Buffer LVCMOS-/LVTTL-compatible inputs

CY29948
Figure 3. PECL_CLK CY29948 Test Reference for V_CC = 3.3 V and V_CC = 2.5 V
Differential
Pulse
Generator
Z = 50 ohm
Zo = 50 ohm
Zo = 50 ohm
CY29948 DUT
RT = 50 ohm
VTT
Zo = 50 ohm
RT = 50 ohm
VTT
Figure 4. Propagation Delay (t_PD) Test Reference
PECL_CLK
PECL_CLK
VPP
V CMR
Q
t PD
VCC
V C C /2
GND
Figure 5. LVCMOS Propagation Delay (t_PD) Test Reference
LVCMOS_CLK
Q
tPD
VCC
VCC /2
GND
VCC
VCC /2
GND
Figure 6. Output Duty Cycle (F_outDC)
tP
T0
DC = tP / T0 x 100%
VCC
VCC /2
GND
Document Number: 38-07288 Rev. *E
Page 5 of 10
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