W234_02 Datasheet, PDF (9/14 Pages) Cypress Semiconductor – Dual Direct Rambus™ Clock Generator

W234
Table 9. Supply and Reference Current Specification
Parameter
Description
Min.
Max.
Unit
I_POWERDOWN “Supply” current in Power-Down state (PWR_DWN# = 0)
--
I_CLKSTOP
“Supply” current in Clk Stop state (STOP# = 0)
--
I_NORMAL
“Supply” current in Normal state
--
(STOP# = 1,PWR_DWN# = 1)
1.2
mA
175
mA
225
mA
I_REF,PWDN
Current at VDDIR or VDDIPD reference pin in PWR_DWN#
--
state (PWR_DWN# = 0)
50
µA
I_REF,NORM
Current at VDDIR or VDDIPD reference pin in Normal or Clk
--
Stop state (PWR_DWN# = 1)
4
mA
Table 10 represents stress ratings only, and functional operation at the maximums is not guaranteed.
Table 10. Absolute Maximum Ratings
Parameter
Description
VDD_{, ABS}
V_{I, ABS}
Max. voltage on VDD with respect to ground
Max. voltage on any pin with respect to ground
Min.
Max.
Unit
–0.5
4.0
V
–0.5
VDD+0.5
V
Table 11 gives the nominal values of the external components and their maximum acceptable tolerance, assuming Z_CH=28Ω.
Table 11. External Component Values
Parameter
Description
Recommended
Test Load
Value
Tolerance
Unit
R_S
Serial Resistor
47
39
±5%
Ω
R_P
Parallel Resistor
47
51
±5%
Ω
C_F
Edge Rate Filter Capacitor
Note 1
Note 1
±10%
pF
C_MID
AC Ground Capacitor
100 pF
0.1
±20%
µF
Note:
1. Do not populate C_F. Leave pads for future use.
Clock Output Driver
Figure 7. Example System Clock Driver Equivalent Circuit
Document #: 38-07232 Rev. *B
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