beautypg.com

Router user’s guide 67 – Echelon LonWorks Router User Manual

Page 77

background image

CP0

CP1

CP3

RST~

CP4

32 RX

34 TX

38

28

39

Router 5000

FTT-10A Transceiver

8

NETB

NETA

R1

10k

+3.3 V

+5 V

RXD

TXD

GND

VCC

8

5

4

1

NET_A

NET_B

2

3

GND

36

VDD3V3

Low drop-out

linear regulator

INPUT
+5 V

OUTPUT

+3.3 V

C5

0.1 µF

C4

1 µF

OE

10 MHz

18 pF

C2

30 pF

C1

33 pF

R3

200

R2
1M

XOUT

XIN

CLK

6

+5 V

23

24

GROUND GUARD

U1

U2

U3

CP2

37

T1

T2

9

7

D1

D2

C6

0.1 µF

+5 V

C9

22 µF

C8

22 µF

+

+

C7

1000 pF

D3

D4

PCB Spark Gaps

Or

Fast Surge

Protectors with

Microgap

C3

0.1 µF

+5 V

Figure 34. Connecting a Router 5000 to an FTT-10A Transceiver

Table 15. Example Bill of Materials for the FTT-10A Circuit

Designator

Value

C1

33 pF

C2

30 pF

C3, C5, C6

0.1 µF

C4

1 µF

C7

1000 pF

C8, C9

22 µF, 50 V, polar

D1, D2, D3, D4

BAV99 or 1N4148 (x2)

R1

10 kΩ

R2

1 MΩ

R3

200 Ω

L

ON

W

ORKS

Router User’s Guide

67