XRK4991 Datasheet, PDF (8/12 Pages) Exar Corporation – 3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER

XRK4991
3.3V HIGH-SPEED (85 MHZ) PROGRAMMABLE SKEW CLOCK BUFFER
FIGURE 4. AC TEST LOAD
xr
REV. 1.0.1
V_CC
R1
LOAD
R1 = 100
R2 = 100
C_L
C_L = 30pF
R2 ^{(Includes fixture and probe capacitances )}
FIGURE 5. INPUT TEST WAVEFORM
2.0V
V_th = 1.5V
0.8V
0.0V
<1ns
3.0V
2.0V
V_th = 1.5V
0.8V
<1ns
SWITCHING CHARACTERISTICS OVER THE OPERATING RANGE ^[2,9]
SYMBOL
DESCRIPTION
MIN
f_NOM Operating Clock Frequency in MHz
FSEL = LOW ^{[1, 2]}
15
FSEL = MID ^{[1, 2]}
25
FSEL = HIGH ^{[1, 2, 3]}
40
MAX
30
50
85
UNIT
MHz
8