98
R
Spartan-3 FPGA Family:
DC and Switching Characteristics
0
DS099-3 (v2.4) June 25, 2008
Product Specification
DC Electrical Characteristics
In this section, specifications may be designated as
Advance, Preliminary, or Production. These terms are
defined as follows:
Advance:
Initial estimates are based on simulation, early
characterization, and/or extrapolation from the characteris-
tics of other families. Values are subject to change.
Although speed grades with this designation are considered
relatively stable and conservative, some under-reporting
might still occur. Use as estimates, not for production.
Preliminary:
Based on complete early silicon characteriza-
tion. Devices and speed grades with this designation are
intended to give a better indication of the expected perfor-
mance of production silicon. The probability of
under-reported delays is greatly reduced compared to
Advance data. Use as estimates, not for production.
Production:
These specifications are approved only after
silicon has been characterized over numerous production
lots. There is no under-reporting of delays, and customers
receive formal notification of any subsequent changes.
Parameter values are considered stable with no future
changes expected.
Production-quality systems must only use FPGA designs
compiled with a Production status speed file. FPGA designs
using a less mature speed file designation should only be
used during system prototyping or preproduction qualifica-
tion. FPGA designs with speed files designated as Preview,
Advance, or Preliminary should not be used in a produc-
tion-quality system.
Whenever a speed file designation changes, as a device
matures toward Production status, rerun the
®
software
on the FPGA design to ensure that the FPGA
design incorporates the latest timing information and soft-
ware updates.
All parameter limits are representative of worst-case supply
voltage and junction temperature conditions.
The following
Table 27:
Absolute Maximum Ratings
Symbol
V
CCINT
V
CCAUX
V
CCO
V
REF
Description
Internal supply voltage relative to GND
Auxiliary supply voltage relative to GND
Output driver supply voltage relative to GND
Input reference voltage relative to GND
Conditions
Min
–0.5
–0.5
–0.5
–0.5
Max
1.32
3.00
3.75
V
CCO
+ 0.5
Units
V
V
V
V
applies unless otherwise noted: The parameter values
published in this module apply to all Spartan
®
-3
devices. AC and DC characteristics are specified using
the same numbers for both commercial and industrial
grades.
All parameters representing voltages are mea-
sured with respect to GND.
If a particular Spartan-3 FPGA differs in functional behavior
or electrical characteristic from this data sheet, those differ-
ences are described in a separate errata document. The
errata notices for Spartan-3 FPGAs are living documents
and are available online. Also, create a Xilinx MySupport
user account and sign up for automatic E-mail notification
whenever this data sheet or an errata notice is updated.
•
Spartan-3 FPGA Errata Notices
•
To Sign Up for Alerts on Xilinx MySupport
Mask and Fab Revisions
Some specifications list different values for one or more
mask or fab revisions, indicated by the device top marking
(see
The revision differences
involve the power ramp rates, differential DC specifications,
and DCM characteristics. The most recent revision (mask
rev E and GQ fab/geometry code) is errata-free with
improved specifications than earlier revisions.
Mask rev E with fab rev GQ has been shipping since 2005
(see
) and has been 100% of Xilinx Spartan-3
device shipments since 2006. SCD 0974 was provided to
ensure the receipt of the rev E silicon, but it is no longer
needed. Parts ordered under the SCD appended “0974” to
the
standard
part
number.
For
example,
“XC3S50-4VQ100C” became “XC3S50-4VQ100C0974”.
© 2003-2008 Xilinx, Inc. All rights reserved. All Xilinx trademarks, registered trademarks, patents, and disclaimers are as listed at
All other trademarks and registered trademarks are the property of their respective owners. All specifications are subject to change without notice.
DS099-3 (v2.4) June 25, 2008
Product Specification
55
XILINX [ XILINX, INC ]
