DS1035 Datasheet, PDF (52/106 Pages) Dallas Semiconductor – 3-in-1 High.Speed Silicon Delay Line

DC and Switching Characteristics
MachXO2 Family Data Sheet
RSDS
The MachXO2 family supports the differential RSDS standard. The output standard is emulated using complemen-
tary LVCMOS outputs in conjunction with resistors across the driver outputs on all the devices. The RSDS input
standard is supported by the LVDS differential input buffer. The scheme shown in Figure 3-4 is one possible solu-
tion for RSDS standard implementation. Use LVDS25E mode with suggested resistors for RSDS operation. Resis-
tor values in Figure 3-4 are industry standard values for 1% resistors.
Figure 3-4. RSDS (Reduced Swing Differential Standard)
VCCIO = 2.5V
294
8mA
VCCIO = 2.5V
294
8mA
Zo = 100
121
+
100
-
On-chip
Emulated
RSDS Buffer
Off-chip
Table 3-4. RSDS DC Conditions
Parameter
Z_OUT
R_S
R_P
R_T
V_OH
V_OL
V_OD
V_CM
Z_BACK
I_DC
Description
Output impedance
Driver series resistor
Driver parallel resistor
Receiver termination
Output high voltage
Output low voltage
Output differential voltage
Output common mode voltage
Back impedance
DC output current
Off-chip
On-chip
Typical
20
294
121
100
1.35
1.15
0.20
1.25
101.5
3.66
Units
Ohms
Ohms
Ohms
Ohms
V
V
V
V
Ohms
mA
3-13