XA6SLX25T-2CSG324I Xilinx Inc, XA6SLX25T-2CSG324I Datasheet - Page 28

• Manufacturer Part Number: XA6SLX25T-2CSG324I
• Description: IC FPGA SPARTAN 6 24K 324CSGBGA
• Manufacturer: Xilinx Inc
• Series: Spartan®-6r

Specifications of XA6SLX25T-2CSG324I

• Number Of Logic Elements/cells: 24051
• Number Of Labs/clbs: 1879
• Total Ram Bits: 958464
• Number Of I /o: 190
• Voltage - Supply: 1.14 V ~ 1.26 V
• Mounting Type: Surface Mount
• Operating Temperature: -40°C ~ 100°C
• Package / Case: 324-LFBGA, CSPBGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of Gates: -

Table 31: Output Delay Measurement Methodology (Cont’d)
Simultaneously Switching Outputs
Due to lead inductance, a given package supports a limited number of simultaneous switching outputs (SSOs) when using
fast, high-drive outputs.
SSOs. These guidelines describe the maximum number of user I/O pins of an output signal standard that should
simultaneously switch in the same direction, while maintaining a safe level of switching noise for that particular signal
standard. Meeting these guidelines for the stated test conditions ensures that the FPGA operates free from the adverse
effects of GND and power bounce.
For each device/package combination,
output signal standard and drive strength,
direction, allowed per V
output drive current. The number of SSOs are also specified by I/O bank. Multiply the appropriate numbers from each table
to calculate the maximum number of SSOs allowed within an I/O bank. The guidelines assume that all pins within a bank use
the same I/O standard. Exceeding these SSO guidelines can result in increased power or GND bounce, degraded signal
integrity, or increased system jitter. For a given I/O standard, if the SSO limit per pair in
I/O per pair in
The recommended maximum SSO values assume that the FPGA is soldered on a printed circuit board and that the board
uses sound design practices. Due to the additional lead inductance introduced by the socket, the SSO values do not apply
for FPGAs mounted in sockets. The SSO values assume that the V
provides better SSO characteristics. For more detail, see the Spartan-6 FPGA SelectIO Resources User Guide.
DS162 (v2.0) March 31, 2011
Preliminary Product Specification
Notes:
1.
2.
3.
SSTL, Class II, 2.5V
SSTL, Class II, 1.5V
LVDS (Low-Voltage Differential Signaling), 2.5V & 3.3V
BLVDS (Bus LVDS), 2.5V
Mini-LVDS, 2.5V & 3.3V
RSDS (Reduced Swing Differential Signaling), 2.5V & 3.3V RSDS_25, RSDS_33
TMDS (Transition Minimized Differential Signaling), 3.3V
PPDS (Point-to-Point Differential Signaling, 2.5V & 3.3V
C
Per PCI specifications.
The value given is the differential output voltage.
REF
is the capacitance of the probe, nominally 0 pF.
Table
32, then there is no SSO limit for the exclusive use of that I/O standard.
Description
CCO
Table 32
/GND pair within an I/O bank. The guidelines are categorized by package style, slew rate, and
and
Table 33
Table 32
Table 33
provide guidelines for the recommended maximum allowable number of
provides the number of equivalent V
recommends the maximum number of SSOs, switching in the same
www.xilinx.com
Spartan-6 FPGA Data Sheet: DC and Switching Characteristics
LVDS_25, LVDS_33
MINI_LVDS_25, MINI_LVDS_33
SSTL2_II
SSTL15_II
BLVDS_25
TMDS_33
PPDS_25, PPDS_33
I/O Standard
Attribute
CCAUX
is powered at 3.3V. Setting V
CCO
Table 33
/GND pairs per bank. For each
R
100
100
100
100
100
100
()
25
25
REF
is greater than the maximum
C
(pF)
REF
0
0
0
0
0
0
0
0
(1)
CCAUX
V
V
V
MEAS
(V)
0
0
0
0
0
0
REF
REF
to 2.5V
(3)
(3)
(3)
(3)
(3)
(3)
V
1.25
0.75
(V)
1.2
1.2
1.2
REF
0
–
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