AGERE LG1602BXB, LG1602AXB Datasheet

Data Sheet

V

+REF

V

+IN

V

–IN

V

–REF

25 k

Ω

110 pF

25 k

Ω

110 pF

D
D

Q

V

+OUTV–OUT

V

SS

V

–CLK

V

+CLK

GND

50

Ω

50

Ω

2 pF

2 pF

50

Ω

50

Ω

February 1999

LG1602 Decision Circuit

Features

■

Operation up to 3 Gbits/s

■

Good sensitivity to low input signals

■

Low power dissipation

■

Surface-mount package

Applications

■

SONET/SDH transmission systems

■

Digital video transmission

■

Digital test instruments

Functional Description

The LG1602 is a gallium arsenide (GaAs) decision
circuit. It features a sensitive broadband input ampli­fier and a D-type flip-flop that retimes and regener­ates an input data stream that is weakened by noise,
jitter, and intersymbol interference.

The LG1602 has complementary 50 Ω output buff­ers.

dc feedback ensures input threshold control for input
levels as low as 25 mV, when using dc balanced
input data. The LG1602 is available in a hermetically
sealed 16-lead glass-metal surface-mount package.

5-7667(F)r.3

Figure 1. LG1602 Functional Diagram

Data Sheet

y

y

y

µ

µ

y

g

g

LG1602 Decision Circuit February 1999

Pin Information

GND

+CLK

V

–CLK

V

GND GND NC

16 15 14 13

1

2

3

SS

V

4

5678

NC

12

11

10

9

V

V

V

V

+REF

+IN

–IN

–REF

–OUTV+OUT

V

NC NC

Figure 2. Pin Diagram

Table 1. Pin Descriptions

Pin Symbol Name/Description

2V
3V
4V
5V
6V

9V
10 V
11 V
12 V

1, 15, 16,

Packa

e

+CLK
–CLK

SS
–OUT
+OUT

–REF

–IN
+IN

+REF

GND

Clock Input.
Clock Input.

Ma

be grounded, if not used.

Ma

be grounded, if not used.

dc Supply Voltage.
Negative Data Output.
Positive Data Output.

ac couple or terminate with 50 Ω to GND.

ac couple or terminate with 50 Ω to GND.

Data Negative Reference.
Negative Data Input.
Positive Data Input.

ac couple with 0.047
ac couple with 0.047

Data Positive Reference.
Ground.

For optimum performance, packa

plane.

B

pass to GND with 0.047 µF in series with 5 Ω.

B

pass to GND with 0.047 µF in series with 5 Ω.

Back

7, 8, 13, 14 NC

No Connection.

12-3223(F).ar.2

F.

F.

e back should contact board ground

2 Lucent Technologies Inc.

Data Sheet

g

g

y

y

g

g

)

February 1999 LG1602 Decision Circuit

Absolute Maximum Ratings

Stresses in excess of the absolute maximum ratings can cause permanent or latent damage to the device. These
are absolute stress ratin
excess of those

iven in the operational sections of the data sheet. Exposure to absolute maximum ratings for

extended periods can adversel

Table 2. Absolute Maximum Ratings

Supply Voltage Range (V
Power Dissipation — 1 W
Voltage (all pins) 0.5 V
Clock Input (V

– V

V

+REF

V

– V

–REF

+CLK
+IN
–IN

Storage Temperature Range –40 125 °C
Operating Case Temperature Range 0 100 °C

s only. Functional operation of the device is not implied at these or any other conditions in

affect device reliability.

Parameter Min Max Unit

)0.5–7V

SS

V

, V

–CLK

SS

—±2V
—±2V
—±2V

Recommended Operating Conditions

Table 3. Recommended Operating Conditions

Parameter Symbol Min Max Unit

Case Temperature t
Power Supply V

CASE

SS

075°C

–4.7 –5.7 V

Handling Precautions

Although protection circuitry has been designed into this device, proper precautions should be taken to avoid e xpo­sure to electrostatic discharge (ESD) during handling and mounting. Lucent employs a human-body model (HBM)
and a charged-device model (CDM) for ESD-susceptibility testing and protection design evaluation. No industry­wide standard has been adopted for the CDM. However, a standard HBM (resistance = 1500 Ω, capacitance =
100 pF) is widely used and, therefore, can be used for comparison purposes. The HBM ESD threshold presented
here was obtained by using these circuit parameters.

Table 4. ESD Threshold

HBM ESD Threshold

Device Voltage

LG1602 ≥200 V

Mounting and Connections

Certain precautions must be taken when using solder. For installation using a constant temperature solder, tem­peratures of under 300 °C ma
solderin

iron (battery operated or nonswitching only), the soldering tip temperature should not be greater than

300 °C and the solderin

be employed for periods of time up to 5 seconds, maximum. For installation with a

time for each lead must not exceed 5 seconds.

3Lucent Technologies Inc.