SCEU026 February   2024 SN74AVC8T245 , SN74AVC8T245-Q1 , SN74AXC8T245 , SN74AXC8T245-Q1 , SN74LVC8T245 , SN74LVC8T245-Q1 , SN74LXC8T245 , SN74LXC8T245-Q1 , TXV0106 , TXV0106-Q1 , TXV0108 , TXV0108-Q1

 

  1.   1
  2.   Description
  3.   Get Started
  4.   Features
  5.   Applications
  6.   6
  7. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specification
    4. 1.4 Device Information
  8. 2Hardware
    1. 2.1 EVM Features
    2. 2.2 Hardware Description
      1. 2.2.1 Headers
      2. 2.2.2 Bypass Capacitors
      3. 2.2.3 Pull-up and Pull-down Resistors and Capacitive Loading
      4. 2.2.4 SMA Connectors
      5. 2.2.5 Set-up and Measurements
  9. 3Hardware Design Files
    1. 3.1 Schematic
    2. 3.2 PCB Layout
    3. 3.3 Bill of Materials
  10. 4Additional Information
    1.     Trademarks

3.2 PCB Layout

Section 3.2 illustrates the EVM layouts. Increase zoom level for clarity.

GUID-20230622-SS0I-JJHM-RMCB-DX6KW1TC9RSM-low.svg Figure 3-7 TXV0106-EVM Layout
GUID-20230619-SS0I-9BXM-32QT-RS45Q7LSFCTW-low.jpg Figure 3-8 TXV0108-EVM Layout

The approximate EVM traces and the round trip delays are listed in Table 4-1 for de-skew purposes.

Table 3-1 Board Trace Length And The Respective Delays
TXV0106-EVM TXV0108-EVM

I/O Pins

Total trace length

Trace length from device to headers

Total delay

 Delay from device to headers Total trace length Trace length from device to headers Total delay Delay from device to headers

A1

2.3 inches

0.7 inches

260ps

 81ps 1.3 inches 0.7 inches

147ps

76ps

A2

1.9 inches

0.5 inches

215ps

53ps

 2.3 inches 0.9 inches

257ps

98ps

A3

1.6 inches

0.2 inches

184ps

35ps

 1.9 inches 0.8 inches

217ps

72ps

A4

1.7 inches

0.4 inches

196ps

39ps

 1.8 inches 0.8 inches

200ps

93ps

A5

2 inches

0.6 inches

225ps

67ps

 1.6 inches 0.6 inches

184ps

67ps

A6

2.4 inches

0.8 inches

270ps

94ps

 1.8 inches 0.9 inches

201ps

80ps

A7

 N/A N/A N/A N/A 1.9 inches 1 inch

217ps

97ps

A8

 N/A N/A N/A N/A 1 inch 0.4 inches

111ps

32ps

B1

 0.8 inches

0.8 inches

 84ps 84ps

1.3 inches

0.8 inches

140ps

79ps

B2

 0.8 inches 0.8 inches 84ps 84ps

2.2 inches

0.7 inches

 246ps 77ps

B3

 0.8 inches 0.8 inches 84ps 84ps

1.9 inches

0.6 inches

 209ps

70ps

B4

 0.8 inches 0.8 inches

84ps

 84ps

1.7 inches

0.6 inches

191ps

70ps

B5

 0.8 inches 0.8 inches 84ps 84ps

1.8 inches

0.5 inches

200ps

52ps

B6

 0.8 inches 0.8 inches 84ps 84ps

1.7 inches

0.8 inches

192ps

79ps

B7

 N/A N/A

N/A

 N/A

2 inches

0.9 inches

222ps

77ps

B8

 N/A N/A

N/A

 N/A

1 inch

0.5 inches

114ps

55ps