Page 5 of 9

7. PINOUT

Pinout is shown in Table 4.

The mounting studs are for mechanical

attachment to the circuit board and are not connected to internal circuit.

Table 4. Pin Designations

Name

Symbol

Pin

Pin

Symbol

Name

Received Power Monitor

(PD bias / APD monitor)

RMON

1

20

Receiver Ground

RGND

2

19

Receiver Ground

RGND

3

18

BMON+

LD Bias Monitor(positive)

No Internal Connection

NC

4

17

BMON-

LD Bias Monitor(Negative)

No Internal Connection

NC

5

16

TGND

Transmitter Ground

Receiver Ground

RGND

6

15

DI

Transmit DATA(CML)

Receiver VCC(+3.3V)

RVCC

7

14

DI

Transmit DATA(CML)

Signal Detect(TTL)

SD

8

13

TD

Transmitter Disable(TTL)

Received DATA(CML)

DO

9

12

TGND

Transmitter Ground

Received DATA(CML)

DO

10

11

TVCC

Transmitter VCC(+3.3V)

Pin 17 to Pin20 are outputs of laser monitoring function. These pins should

be connected to high impedance voltage sensing circuit. Internal circuit is

shown in Figure 2. If these function are not used, the pins should be open.

Figure 2. Equivalent internal circuit of PMON,BMON

Vcc

Monitor PD

laser

BMON+

BMON-

PMON+

PMON-

bias current

3k

3k

3k

3k

200

10

Laser

Driver