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R485JPBB

R485-Type Lightwave Receiver with Clock Recovery for 2.488 Gb/s Applications

TriQuint Semiconductor 

R485-Type Lightwave Receiver with Clock Recovery

for 2.488 Gb/s Applications

Data Sheet

March 2003

Flag Output

Receiver Processing

When the incoming optical signal falls below the link-

status switching threshold, the FLAG output is asserted

and the FLAG output logic level changes from a TTL

low to a TTL high.

Power Monitor

The R485-Type receiver devices can withstand normal

wave soldering processes. The complete receiver

module is not hermetically sealed; therefore, it should

not be immersed in, or sprayed with, any solutions. The

optical connector process cap deformation tempera-

ture is 85 °C. The receiver pins can be wave soldered

at 250 °C for 10 seconds.

An analog photodetector monitor provides a voltage lin-

early proportional to the input power level (OILV).

Electrostatic Discharge

Pin Information

Table 1. Pin Information

Pin

Name

Pin

Name

1 NIC

2 NUC*

3 LOS Flag†

4 Ground

5 CLOCK

6 CLOCK

7 Ground

8 VCC

9 Ground

10 DATA

11 DATA

12 Ground

24 NUC*

23 OILV

22 VCC

21 NUC*

20 Ground

19 Ground

18 NIC

17 Ground

16 Ground

15 Ground

14 Ground

13 DTV/NIC‡

* Pins designated as no user connect (NUC) are connected inter-

nally. The user should not make any connections to these pins.

† The loss of signal (LOS) FLAG output is a logic level that indicates

the presence or absence of a minimum acceptable level of optical

input. A TTL logic HIGH indicates the absence of a valid optical

input signal.

‡ This pin is not internally connected if the amplitude decision thresh-

old (DTV) is not made adjustable.

Handling Precautions

CAUTION: This device is susceptible to damage as

a result of electrostatic discharge (ESD).

Take proper precautions during both

handling and testing. Follow guidelines

such as JEDEC Publication No. 108-A

(Dec. 1988).

Although protection circuitry is designed into the

device, take proper precautions to avoid exposure to

ESD.

TriQuint employs a human-body model HBM) for ESD-

susceptibility testing and protection design evaluation.

ESD voltage thresholds are dependent on the critical

parameters used to define the model. A standard HBM

(resistance = 1.5 kΩ, capacitance = 100 pF) is widely

used and, therefore, can be used for comparison pur-

poses.

Installation Considerations

Although the receiver has been designed with rugged-

ness in mind, care should be used during handling.

The optical connector should be kept free from dust.

The optical connector process cap should be kept in

place as a dust cover when the device is not connected

to a cable. If contamination is present on the optical

connector, the use of canned air with a extension tube

should remove any loose debris.

The cable should be handled conservatively with no

excessive axial pulling or lateral tugging.

The R485-Type receiver is manufactured with a

39 in. ± 4 in. (100 cm ± 10 cm) single-mode fiber pigtail

with a 900 µm OD PVC outer jacket. Both SC and FC-

PC connectors are offered on standard versions. Other

optical connector options are available on special

order.

The minimum fiber bending radius is 1.5 inches

(38 mm).

2

For additional information and latest specifications, see our website: www.triquint.com

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