XC3S400-4FT256I Overview
There are two packages that contain fpga chips: 256-LBGA package and X package. The FIELD PROGRAMMABLE GATE ARRAY-series of FPGAs are composed of this type. Having 173 I/Os makes data transfers more coherent. Logic blocks consist of 8064 logic elements/cells. The supply voltage is 1.2V volts. An attachment Surface Mount allows the FPGA module to be attached to the development board. The supply voltage of the device is 1.14V~1.26V , at which it runs. The Spartan®-3 series FPGA is a type of FPGA that belongs to the Spartan®-3 family of FPGAs. When operating the machine, it is important to keep the temperature within -40°C~100°C TJ range. This device is equipped with 173 separate outputs, which makes it a very versatile device. There is an FPGA model contained in Bulk in order to conserve space. In total, it has 256 terminations on each end. A device like this one offers 294912 RAM bits, which is a considerable amount of memory. This FPGA module has a RAM si36kBe of 36kB that is sufficient to make sure that the program is able to run normally. In this case, there are 256 pins on the board. A total of 896 LABs/CLBs make up this FPGA array. Having stated that, if this FPGA is mounted in Standard, then it may be able to perform fantastically according to its specifications. The 1.2V supply voltage provides designers with full flexibility in their designs. The device runs on a 1.21.2/3.32.5V battery and requires no additional power supply to operate. The building block that forms the basis of the system contains 400000 gates. This device has a pin count of 256 in fpga semiconductor. It usually uses a crystal oscillating at a frequency of 630MHz in order to do its work. A CLB is a basic module that determines the architecture of a system.
XC3S400-4FT256I Features
173 I/Os
Up to 294912 RAM bits
256 LABs/CLBs

XC3S400-4FT256I Applications
There are a lot of Xilinx Inc.
XC3S400-4FT256I FPGAs applications.

Computer hardware emulation
Integrating multiple SPLDs
Voice recognition
Cryptography
Filtering and communication encoding
Aerospace and Defense
Medical Electronics
Audio
Automotive
Consumer Electronics

Factory Lead Time	10 Weeks
Mount	Standard
Mounting Type	Surface Mount
Package / Case	256-LBGA
Number of Pins	256
Operating Temperature	-40°C~100°C TJ
Packaging	Bulk
Series	Spartan®-3
Published	2009
JESD-609 Code	e0
Pbfree Code	no
Part Status	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Number of Terminations	256
ECCN Code	EAR99
Terminal Finish	Tin/Lead (Sn63Pb37)
Voltage - Supply	1.14V~1.26V
Terminal Position	BOTTOM
Terminal Form	BALL
Peak Reflow Temperature (Cel)	240
Supply Voltage	1.2V
Terminal Pitch	1mm
Time@Peak Reflow Temperature-Max (s)	30
Pin Count	256
Number of Outputs	173
Qualification Status	Not Qualified
Operating Supply Voltage	1.2V
Power Supplies	1.21.2/3.32.5V
Number of I/O	173
RAM Size	36kB
Clock Frequency	630MHz
Programmable Logic Type	FIELD PROGRAMMABLE GATE ARRAY
Number of Logic Elements/Cells	8064
Total RAM Bits	294912
Number of Gates	400000
Number of LABs/CLBs	896
Speed Grade	4
Combinatorial Delay of a CLB-Max	0.61 ns
Number of CLBs	896
Length	17mm
Height Seated (Max)	1.55mm
Width	17mm
RoHS Status	Non-RoHS Compliant