W83194R-37 Winbond Electronics Corp America, W83194R-37 Datasheet - Page 16

• Manufacturer Part Number: W83194R-37
• Description: Description = 100MHz/133MHz Via MVP3, Via Apollo Pro Clock Gen., 3-DIMM, With S.S.T. ;; Package = Ssop 48
• Manufacturer: Winbond Electronics Corp America

Each of these pins are a large pull-up resistor (250 K @3.3V) inside. The default state will be logic 1,
but the internal pull-up resistor may be too large when long traces or heavy load appear on these dual
function pins. Under these conditions, an external 10 K
V
The 10 K
only be latched at initial power on.
If optional EMI reducing capacitor are needed, they should be placed as close to the series
terminating resistor as possible and after the series terminating resistor. These capacitor has typical
values ranging from 4.7 pF to 22 pF.
DD
if logic 1 is expected. Otherwise, the 10 K
resistor should be place before the serious terminating resistor. Note that these logic will
Device
V
Pin
DD
Device
Pin
Pad
Programming Header
10 K
10 K
10 K
Ground
V
DD
Terminating
Ground Pad
- 16 -
resistor is connected to ground if a logic 0 is desired.
Terminating
Resistor
Preliminary W83194R-37/-58
Series
Resistor
Series
resistor is recommended to be connected to
Ground
EMI
Reducing
Cap
EMI
Reducing
Cap
Ground
Clock
Trace
Optional
Clock
Trace
Optional