xc3s1400an Xilinx Corp., xc3s1400an Datasheet - Page 18

• Manufacturer Part Number: xc3s1400an
• Description: Spartan-3an Fpga Family Data Sheet
• Manufacturer: Xilinx Corp.

DC and Switching Characteristics
Differential I/O Standards
Differential Input Pairs
Table 13: Recommended Operating Conditions for User I/Os Using Differential Signal Standards
18
Notes:
1.
2.
3.
4.
5.
6.
7.
8.
9.
LVDS_25
LVDS_33
BLVDS_25
MINI_LVDS_25
MINI_LVDS_33
LVPECL_25
LVPECL_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 V
V
These true differential output standards are supported only on FPGA banks 0 and 2. Inputs are unrestricted. See the “Using I/O Resources” chapter in UG331.
See
LVPECL is supported on inputs only, not outputs. Requires V
LVPECL_33 maximum V
Requires V
These higher-drive output standards are supported only on FPGA banks 1 and 3. Inputs are unrestricted. See the “Using I/O Resources” chapter in UG331.
V
standards do not use V
ICM
REF
"External Termination Requirements for Differential I/O," page
must be less than V
inputs are used for the DIFF_SSTL and DIFF_HSTL standards. The V
CCO
(3)
(3)
(3)
(3)
(3)
(3)
(3, 4, 7)
(4)
(5)
(5)
rails supply only differential output drivers, not input circuits.
CCAUX
(3)
(3)
(8)
(8)
(8)
= 3.3V ± 10% for inputs. (V
REF
ICM
CCAUX
.
= V
.
CCAUX
Min (V)
Internal
GND level
2.25
2.25
2.25
2.25
3.14
2.25
3.0
3.0
3.0
3.0
1.7
1.7
1.7
1.4
1.4
1.7
1.7
2.3
2.3
3.0
3.0
Logic
– (V
V
V
V
CCO
ID
INN
INP
CCAUX
/ 2)
Inputs Only
Inputs Only
Nom (V)
for Drivers
V
2.5
3.3
2.5
2.5
3.3
2.5
3.3
3.3
2.5
3.3
1.8
1.8
1.8
1.5
1.5
1.8
1.8
2.5
2.5
3.3
3.3
– 300 mV) ≤ V
ICM
V
Figure 5: Differential Input Voltages
ID
= Input common mode voltage =
= Differential input voltage = V
50%
CCAUX
(1)
Max (V)
2.75
2.75
2.75
2.75
3.47
2.75
ICM
20.
3.6
3.6
3.6
3.6
1.9
1.9
1.9
1.6
1.6
1.9
1.9
2.7
2.7
3.6
3.6
= 3.3V ± 10%.
V
ICM
≤ (V
www.xilinx.com
ICM
REF
Min (mV) Nom (mV) Max (mV)
– 37 mV)
settings are the same as for the single-ended versions in
100
100
100
100
200
200
100
100
100
100
150
100
100
100
100
100
100
100
100
100
100
100
100
V
V
V
INP
ID
INN
INP
V
350
350
300
800
800
200
200
V
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
–
ID
INP
- V
N
P
INN
+ V
2
INN
Differential
I/O Pair Pins
DS529-3_10_012907
1000
1000
1200
600
600
600
600
400
400
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Min (V)
0.68
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
2.7
0.2
0.2
0.8
0.8
0.8
0.7
0.7
1.0
1.0
1.1
1.1
–
DS557-3 (v3.1) June 2, 2008
Table
Product Specification
Nom (V)
V
1.25
1.25
11. Other differential
ICM
1.3
1.2
1.2
1.2
1.2
1.2
1.2
0.9
–
–
–
–
–
–
–
–
–
–
–
–
(2)
Max (V)
2.8
2.35
2.35
2.35
1.95
1.95
1.95
3.23
1.5
1.5
2.3
2.3
1.1
1.1
1.1
0.9
1.1
1.1
1.5
1.5
1.9
1.9
–
(6)
R