CDCD5704 Datasheet, PDF (12/17 Pages) Texas Instruments – Rambus TM XDR TM CLOCK GENERATOR

CDCD5704
SCAS823 – DECEMBER 2006
CLK
CDCD5704
XCG
CLKB
R_RC
V_TS
R₁
R₂
R₃
Z₀=50 W
V_T = 1.2 V
R_T
V_TS
R₁
Measurement Points
R₂
V_T = 1.2 V
Z₀=50 W
R_T
R₃
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S0201-01
NOTE: In the power-up sequence, the rise time for the external voltage applied to the clock output pins (V_TS) must be equal
to or longer than the rise time for the supply voltage of the device (V_DD, V_DDP, V_DDC).
PARAMETER
R₁
Termination resistor
R₂
Termination resistor
R₃
Termination resistor
R_T
Termination resistor
R_RC
Swing control resistor
V_TS
Source termination voltage
V_T
Termination voltage
VALUE for 50-Ω LINE
39.2
66.5
93.1
49.9
200
2.5
1.2
VALUE for I_OL,ABS
34
31.8
48.7
28
147
2.5
1.2
TOLERANCE
±1%
±1%
±1%
±1%
±1%
±5%
±5%
UNIT
Ω
Ω
Ω
Ω
Ω
V
V
Figure 3. Output Test Load
V_{H 80%}
V(t)
20%
V_L
t_f
t_r
T0132-01
Figure 4. Input and Output Waveforms
12
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