1. tPHL and tPLH signals are measured from the input passing through VTHI or input pair crossing to Qn passing through VTHO.
2. Pulse Skew is calculated using the following expression:
tSK(P) = | tPHL - tPLH |
where tPHL and tPLH are measured on the controlled edges of any one output from rising and falling edges of a single pulse. Please note that the tPHL and tPLH shown are not valid
measurements for this calculation because they are not taken from the same pulse.
SDR AC TIMING WAVEFORMS
SDR Gate Disable/Enable Showing Runt Pulse Generation
NOTE:
As shown, it is possible to generate runt pulses on gate disable and enable of the outputs. It is the user's responsibility to time their Gx signals to avoid this problem.
REVISION A 11/3/15
5T915 DATA SHEET
172.5V DIFFERENTIAL 1:5 CLOCK BUFFER
TERABUFFER™
TEST CIRCUITS AND CONDITIONS
Test Circuit for Differential Input
(1)
DIFFERENTIAL INPUT TEST CONDITIONS
Symbol VDD = 2.5V ± 0.1V Unit
R1 100 Ω
R2 100 Ω
V
DDI VCM*2 V
HSTL: Crossing of A and A
eHSTL: Crossing of A and A
V
THILVEPECL: Crossing of A and A V
1.8V LVTTL: V
DDI/2
2.5V LVTTL: V
DD/2
NOTE:
1. This input confi guration is used for all input interfaces. For single-ended testing, the VIN
input is tied to GND. For testing single-ended in differential input mode, the VIN is left
fl oating.
2.5V DIFFERENTIAL 1:5 CLOCK BUFFER
TERABUFFER™
5T915 DATA SHEET
18REVISION A 11/3/15
Test Circuit for SDR OutputsTest Circuit for Differential Outputs
