Xilinx DS610 - Manual (Page 17)

Spartan-3A DSP FPGA Family: DC and Switching Characteristics
DS610 (v3.0) October 4, 2010 www.xilinx.com
Product Specification 17
Differential Output Pairs
X-Ref Target - Figure 4
Figure 4: Differential Output Voltages
Table 13: DC Characteristics of User I/Os Using Differential Signal Standards
IOSTANDARD Attribute
V
OD
V
OCM
V
OH
V
OL
Min (mV) Typ (mV) Max (mV) Min (V) Typ (V) Max (V) Min (V) Max (V)
LVDS_25 247 350 454 1.125 – 1.375 – –
LVDS_33 247 350 454 1.125 – 1.375 – –
BLVDS_25 240 350 460 – 1.30 – – –
MINI_LVDS_25 300 – 600 1.0 – 1.4 – –
MINI_LVDS_33 300 – 600 1.0 – 1.4 – –
RSDS_25 100 – 400 1.0 – 1.4 – –
RSDS_33 100 – 400 1.0 – 1.4 – –
TMDS_33 400 – 800 V
CCO
– 0.405 – V
CCO
– 0.190 – –
PPDS_25 100 – 400 0.5 0.8 1.4 – –
PPDS_33 100 – 400 0.5 0.8 1.4 – –
DIFF_HSTL_I_18 – – – – – – V
CCO
– 0.4 0.4
DIFF_HSTL_II_18 – – – – – – V
CCO
– 0.4 0.4
DIFF_HSTL_III_18 – – – – – – V
CCO
– 0.4 0.4
DIFF_HSTL_I – – – – – – V
CCO
– 0.4 0.4
DIFF_HSTL_III – – – – – – V
CCO
– 0.4 0.4
DIFF_SSTL18_I – – – – – – V
TT
+ 0.475 V
TT
– 0.475
DIFF_SSTL18_II – – – – – – V
TT
+ 0.603 V
TT
– 0.603
DIFF_SSTL2_I – – – – – – V
TT
+ 0.61 V
TT
– 0.61
DIFF_SSTL2_II – – – – – – V
TT
+ 0.81 V
TT
– 0.81
DIFF_SSTL3_I – – – – – – V
TT
+ 0.6 V
TT
- 0.6
DIFF_SSTL3_II – – – – – – V
TT
+ 0.8 V
TT
- 0.8
Notes:
1. The numbers in this table are based on the conditions set forth in Table 7 and Table 12 .
2. See "External Termination Requirements for Differential I/O."
3. Output voltage measurements for all differential standards are made with a termination resistor (R
T
) of 100 Ω across the N and P pins of the differential signal pair.
4. At any given time, no more than two of the following differential output standards can be assigned to an I/O bank: LVDS_25, RSDS_25, MINI_LVDS_25, PPDS_25 when
V
CCO
=2.5V, or LVDS_33, RSDS_33, MINI_LVDS_33, TMDS_33, PPDS_33 when V
CCO
= 3.3V
V
OUTN
V
OUTP
GND level
50%
V
OCM
V
OCM
V
OD
V
OL
V
OH
V
OUTP
Internal
Logic
V
OUTN
N
P
= Output common mode voltage =
2
V
OUTP
+ V
OUTN
V
OD
= Output differential voltage =
V
OH
= Output voltage indicating a High logic level
V
OL
= Output voltage indicating a Low logic level
V
OUTP
- V
OUTN
Differential
I/O Pair Pins
DS312-3_03_090510