11

Table 1. Transmitter Module Pad Description

Symbol

Functional Description

Transmitter Signal Common. All voltages are referenced to this potential unless otherwise

indicated. Directly connect these pads to transmitter signal ground plane.

Transmitter Power Supply. Use recommended power supply filter circuit in Figure 6.

DIN0+ through DIN11+

Transmitter Data In+ for channels 0 through 11, respectively. Differential termination and

self bias are included, see Figure 11.

DIN0– through DIN11–

Transmitter Data In- for channels 0 through 11, respectively. Differential termination and self

bias are included; see Figure 11.

TX_EN

TX Enable. Active high. Internal pull-up High = VCSEL array is enabled if TX_DIS is inactive

or longer.

TX_DIS

TX Disable. Active high. Internal pull-down Low = VCSEL array is enabled if TX_EN is active

ms or longer.

RESET-

Transmitter RESET- input. Active low. Internal pull-up. Low = Resets logic function clears

FAULT- signal, VCSEL array is off. high = Normal operation. See Figure 14.

FAULT-

Transmitter FAULT- output. Active low. Low (logic “0”) results from a VCSEL over-current con-

dition, out of temperature range, or EEPROM calibration data corruption condition detected

for any VCSEL. An asserted (logic “0”) FAULT- disables the VCSEL array and is cleared by

DNC

Do not connect to any electrical potential.

Table 2. Receiver Module Pad Description

Symbol

Functional Description

Receiver Signal Common. All voltages are referenced to this potential unless otherwise

indicated.Directly connect these pads to receiver signal ground plane.

Receiver Power Supply. Use recommended power supply filter circuit in Figure 5.

Not required for Avago product. Pads not internally connected.(Voltage for MSA compatibil-

ity in order to ac-couple receiver data outputs).

DOUT0+ through DOUT11+

Receiver Data Out+ for channels 0 through 11, respectively. Terminate these high-speed

differential CML outputs with standard CML techniques at the inputs of the receiving device.

Individual data outputs will be squelched for insufficient input signal level.

DOUT0– through DOUT11–

Receiver Data Out- for channel 0 through 11, respectively. Terminate these high-speed dif-

ferential CML outputs with standard CML techniques at the inputs of the receiving device.

Individual data outputs will be squelched for insufficient input signal level.

SD

asserted. Low input optical levels to any channel results in a fault condition indicated by a

RX_EN

Receiver output enable. Active high (logic “1”), internal pull-up. Low (logic “0”) = receiver

outputs disabled, all outputs are high (logic “1”).

SQ_EN

Squelch enable input. Active high (logic “1”), internal pull-up. Low (logic “0”) = squelch dis-

abled. When SQ_EN is high and SD is low, corresponding outputs are squelched.

EN_SD

Enable Signal Detect. Active high (logic “1”), internal pull-up. Low (logic “0”) = Signal detect

output forced active high.

DNC

Do not connect to any electrical potential.