XC3S50A Xilinx Corp., XC3S50A Datasheet - Page 19

• Manufacturer Part Number: XC3S50A
• Description: Spartan-3a Fpga Family Data Sheet
• Manufacturer: Xilinx Corp.

Differential Output Pairs
Table 14: DC Characteristics of User I/Os Using Differential Signal Standards
DS529-3 (v1.5) July 10, 2007
Product Specification
Notes:
1.
2.
3.
4.
LVDS_25
LVDS_33
BLVDS_25
MINI_LVDS_25
MINI_LVDS_33
RSDS_25
RSDS_33
TMDS_33
PPDS_25
PPDS_33
DIFF_HSTL_I_18
DIFF_HSTL_II_18
DIFF_HSTL_III_18
DIFF_HSTL_I
DIFF_HSTL_III
DIFF_SSTL18_I
DIFF_SSTL18_II
DIFF_SSTL2_I
DIFF_SSTL2_II
DIFF_SSTL3_I
DIFF_SSTL3_II
IOSTANDARD Attribute
The numbers in this table are based on the conditions set forth in
See
Output voltage measurements for all differential standards are made with a termination resistor (R
of the differential signal pair.
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
V
CCO
"External Termination Requirements for Differential I/O," page
= 3.3V
R
Min (mV) Typ (mV) Max (mV)
Internal
GND level
247
247
240
300
300
100
100
400
100
100
Logic
–
–
–
–
–
–
–
–
–
–
–
V
V
OUTN
OUTP
V
V
350
350
350
OD
OCM
V
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
V
Figure 5: Differential Output Voltages
OD
OH
OL
50%
= Output common mode voltage =
= Output differential voltage =
= Output voltage indicating a Low logic level
= Output voltage indicating a High logic level
CCO
=2.5V, or LVDS_33, RSDS_33, MINI_LVDS_33, TMDS_33, PPDS_33 when
454
454
460
600
600
400
400
800
400
400
V
–
–
–
–
–
–
–
–
–
–
–
OCM
www.xilinx.com
V
CCO
Min (V)
1.125
1.125
1.0
1.0
1.0
1.0
0.5
0.5
Table 8
V
– 0.405
–
–
–
–
–
–
–
–
–
–
–
–
20.
OUTP
V
V
OD
OUTN
and
V
V
OUTP
Typ (V)
OH
V
Table
N
P
1.30
V
OCM
0.8
0.8
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
OUTP
- V
13.
OUTN
Differential
I/O Pair Pins
2
+ V
DS529-3_11_012907
V
V
CCO
OUTN
OL
Max (V)
DC and Switching Characteristics
1.375
1.375
1.4
1.4
1.4
1.4
1.4
1.4
–
– 0.190
–
–
–
–
–
–
–
–
–
–
–
T
) of 100Ω across the N and P pins
V
V
V
V
V
V
V
V
V
V
V
TT
TT
CCO
CCO
CCO
CCO
CCO
Min (V)
TT
TT
TT
TT
V
+ 0.475
+ 0.475
+ 0.61
+ 0.81
OH
–
–
–
–
–
–
–
–
–
–
+ 0.6
+ 0.8
– 0.4
– 0.4
– 0.4
– 0.4
– 0.4
V
V
V
V
V
V
TT
TT
Max (V)
TT
TT
TT
TT
V
0.4
0.4
0.4
0.4
0.4
– 0.475
– 0.475
– 0.61
– 0.81
–
–
–
–
–
–
–
–
–
–
OL
– 0.6
– 0.8
19