ECP2 datasheet(65/386 Pages) LATTICE

65 / 386 page

3-13

DC and Switching Characteristics

Lattice Semiconductor

LatticeECP2/M Family Data Sheet

BLVDS

The LatticeECP2/M devices support the BLVDS standard. This standard is emulated using complementary LVC-

MOS outputs in conjunction with a parallel external resistor across the driver outputs. BLVDS is intended for use

when multi-drop and bi-directional multi-point differential signaling is required. The scheme shown in Figure 3-2 is

one possible solution for bi-directional multi-point differential signals.

Figure 3-2. BLVDS Multi-point Output Example

Table 3-3. BLVDS DC Conditions

Over Recommended Operating Conditions

Parameter

Description

Typical

Units

Zo = 45Ω

Zo = 90Ω

VCCIO

Output Driver Supply (+/- 5%)

2.50

ZOUT

Driver Impedance

10.00

Driver Series Resistor (+/- 1%)

90.00

RTL

Driver Parallel Resistor (+/- 1%)

45.00

90.00

RTR

Receiver Termination (+/- 1%)

45.00

90.00

VOH

Output High Voltage

1.38

1.48

VOL

Output Low Voltage

1.12

1.02

VOD

Output Differential Voltage

0.25

0.46

VCM

Output Common Mode Voltage

1.25

IDC

DC Output Current

11.24

10.20

1. For input buffer, see LVDS table.

Heavily loaded backplane, effective Zo ~ 45 to 90 ohms differential

2.5V

S = 90 ohms

S =

90 ohms

S =

90 ohms

S =

90 ohms

S =

90 ohms

S =

90 ohms

S =

90 ohms

45-90

ohms

45-90

ohms

2.5V

. . .

16mA

ECP2 датащи(PDF) 65 Page - Lattice Semiconductor

ECP2 датащи(HTML) 65 Page - Lattice Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

датащи скачать

ссылки URL