PI2EQX4401 Datasheet, PDF (6/7 Pages) Pericom Semiconductor Corporation – 2.5Gbps x1 Lane Serial PCI Express Repeater/Equalizer with Clock Buffer

PI2EQX4401
2.5Gbps x1 Lane Serial PCI Express
Repeater/Equalizer with Clock Buffer
AC Switching Characteristics for Clock Buffer (V_DD = 1.8 ±0.1V, AV_DD = 1.8 ±0.1V) ⁽³⁾
Symbol
Parameters
Min
T_rise / T_fall
Rise and Fall Time (measured between 0.175V to 0.525V) ⁽¹⁾
125
ΔT_rise / ΔT_fall Rise and Fall Time Variation
V_HIGH
Voltage High including overshoot
660
V_LOW
Voltage Low including undershoot
-200
V_CROSS
Absolute crossing point voltages
200
ΔV_CROSS
Total Variation of Vcross over all edges
T_DC
Duty Cycle (input duty cycle = 50%) ⁽²⁾
45
Max.
525
75
900
550
250
55
Notes:
1. Measurement taken from Single Ended waveform.
2. Measurement taken from Differential waveform.
3. Test configuration is R_S = 33.2Ω, Rp = 49.9Ω, and 2pF.
Units
ps
mV
%
Notes
1
1
1
1
1
1
2
Configuration Test Load Board Termination
CLKBUF
475Ω
1%
Rs
33Ω
5%
Rs
33Ω
5%
Rp
49.9Ω
1%
TLA
TLB
Rp
49.9Ω
2pF
5%
1%
Clock
Clock#
2pF
5%
Figure 2. Configuration test load board termination
Note:
• TLA and TLB are 3” transmission lines.
6
PS8777B
02/15/06