Datasheet > XC2V250-4FG676I

XC2V250-4FG676I

更新时间： 2024-11-09 05:30:15

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XC2V250-4FG676I 数据手册

Virtex-II 1.5V

Field-Programmable Gate Arrays

DS031-2 (v1.3) January 25, 2001

Advance Product Specification

Detailed Description

Input/Output Blocks (IOBs)

Virtex-II I/O blocks (IOBs) are provided in groups of two or four on the perimeter of each device.

Each IOB can be used as input and/or output for single-ended I/Os. Two IOBs can be used as a

differential pair. A differential pair is always connected to the same switch matrix, as shown in

Figure 1.

IOB blocks are designed for high performances I/Os, supporting 19 single-ended standards, as well

as differential signaling with LVDS, LDT, Bus LVDS, and LVPECL.

IOB

PAD4

Differential Pair

IOB

PAD3

Switch

Matrix

IOB

PAD2

Differential Pair

IOB

PAD1

DS031_30_101600

Figure 1: Virtex-II Input/Output Tile

Supported I/O Standards

Virtex-II IOB blocks feature SelectI/O inputs and outputs that support a wide variety of I/O signaling

standards. In addition to the internal supply voltage (V_CCINT= 1.5V), output driver supply voltage

(V_CCO) is dependent on the I/O standard (see Table 1). An auxiliary supply voltage

(V_CCAUX= 3.3 V) is required, regardless of the I/O standard used. For exact supply voltage

absolute maximum ratings, DC Input and Output Levels.

Table 1: Supported Single-Ended I/O Standards

Board

Termination

Voltage (V_TT

I/O

Standard

Output

V_CCO

Input

V_CCO

Input

V_REF

)

LVTTL

3.3

2.5

1.8

1.5

3.3

2.5

1.8

1.5

N/A

LVCMOS33

LVCMOS25

LVCMOS18

LVCMOS15

N/A

All other trademarks and registered trademarks are the property of their respective owners. All specifications are subject to change without notice.

DS031-2 (v1.3) January 25, 2001

Advance Product Specification

www.xilinx.com

1-800-255-7778

Module 2 of 4

12 3 4 5 6 7...50

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