24
INDUSTRIAL TEMPERATURE RANGE
IDT5T9821
EEPROM PROGRAMMABLE 2.5V ZERO DELAY PLL DIFFERENTIAL CLOCK DRIVER
TEST CIRCUITS AND CONDITIONS
Test Circuit for Differential Input
(1)
VDD
VDDQN
D.U.T.
REF[1:0]
REF[1:0]
Pulse
Generator
3 inch, ~50Ω
Transmission Line
3 inch, ~50Ω
Transmission Line
VIN
VIN
VDDI
R1
R2
VDDI
R1
R2
DIFFERENTIAL INPUT TEST CONDITIONS
Symbol VDD = 2.5V ± 0.2V Unit
R1 100 Ω
R2 100 Ω
VDDI VCM*2 V
HSTL: Crossing of REF
[1:0] and REF[1:0]
eHSTL: Crossing of REF[1:0] and REF[1:0]
VTHI LVEPECL: Crossing of REF[1:0] and REF[1:0] V
1.8V LVTTL: V
DDI/2
2.5V LVTTL: V
DD/2
NOTE:
1. This input configuration is used for all input interfaces. For single-ended testing,
the REF[1:0] must be left floating. For testing single-ended in differential input
mode, the VIN should be floating.
