Power Supplies

VD+ - Digital Positive Supply.

Digital positive supply voltage. Nominally +3V

VA+ - Analog Positive Supply.

Analog positive supply voltage. Nominally +3V.

DGND - Digital Ground.

Digital ground, 0V, connection.

AGND - Analog Ground.

Analog ground, 0V, connection.

TGND1, TGND2 - Transmitter Grounds.

LED Transmitter grounds, 0V, connections.

Analog Pins

LED1C, LED2C - Transmit LED Cathode.

These pins are connected to the transmit LED cathode via resistors. Appropriate resistor choice

allows user setting of LED current options. The anode of the LED is connected to the positive

supply.

PINC - Receiver PIN Diode Cathode

Receiver PIN diode cathode.

PINA - Receiver PIN Diode Anode.

Receiver PIN diode anode.

LED1 CATHODE

LED1C

DGND

DIGITAL GROUND

TRANSMIT GROUND 1

TGND1

EXTCLK

EXTERNAL CLOCK

TRANSMIT GROUND 2

TGND2

XTALOUT

CRYSTAL OUTPUT

LED2 CATHODE

LED2C

XTALIN

CRYSTAL INPUT

ANALOG GROUND

AGND

FORM/BSY

FORMAT/BUSY

PIN DIODE ANODE

PINA

D/C

DATA/CONTROL

PIN DIODE CATHODE

PINC

TXD

TRANSMIT DATA

ANALOG SUPPLY

VA+

RXD

RECEIVE DATA

CLOCK FREQUENCY

CLKFR

VD+

DIGITAL SUPPLY

POWER DOWN

PWRDN

RESET

RESET

1

2

3

4

5

6

7

8

9

10

20

19

18

17

16

15

14

13

12

11

CS8130

DS134PP2

25

CS8130

DS134F1

25