LC04-6.T - Semtech Corp. - Datasheet.Directory

PROTECTION PRODUCTS

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PROTECTION PRODUCTS

LC04-6

Dual Low Capacitance TVS Array for

Telecom Linecard Applications

Transient protection for high-speed data lines to

Bellcore GR-1089 IPP=70A (10/1000μs)

Bellcore GR 1089 IPP=100A (2/10μs)

ITU K.20 IPP=100A (5/310μs)

IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)

IEC 61000-4-4 (EFT) 40A (5/50ns)

IEC 61000-4-5 (Lightning) 100A (8/20μs)

Protects two tip and ring line pairs

Low capacitance for high-speed interfaces

High surge capability

Low clamping voltage

Solid-state silicon avalanche technology

Description Features

Circuit Diagram Schematic & PIN Configuration

Revision 08/31/10

Applications

Mechanical Characteristics

The LC04-6 has been specifically designed to protect

sensitive components which are connected to high-

speed telecommunications lines from over voltages

caused by lightning, electrostatic discharge (ESD),

cable discharge events (CDE), and electrical fast

transients (EFT).

The device is in a JEDEC SO-16 NB package. It is

designed to provide metallic surge protection for two

tip and ring line pairs. The low capacitance topology

means signal integrity is preserved on high-speed lines.

The high surge capability (1000W, tp=10/1000μs)

makes the LC04-6 suitable for telecommunications

systems operating in harsh transient environments.

The LC04-6 is designed to meet the lightning surge

requirements of Bellcore GR-1089 (Intra-building) , FCC

Part 68, ITU K.20, and IEC 61000-4-5. The features of

the LC04-6 are ideal for protecting T1/E1 transceivers

in WAN applications.

SO-16 (Top View)

JEDEC SO-16 package

Molding compound flammability rating: UL 94V-0

Lead Finish: Matte Tin

Marking : Part number, date code, logo

Pb-Free, Halogen Free, RoHs/WEEE Compliant

Packaging : Tube or Tape and Reel

T1/E1 Line Cards

Base Stations

WAN Equipment

CSU/DSU

Multiplexers

Routers

ISP Equipment

Customer Premise Equipment

TIP

RING

Pin 1 - 4

Pin 13 - 16

PROTECTION PRODUCTS

LC04-6

Absolute Maximum Rating

Electrical Characteristics

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PROTECTION PRODUCTS

LC04-6

Typical Characteristics

Non-Repetitive Peak Pulse Power vs. Pulse Time Power Derating Curve

Clamping Voltage vs. Peak Pulse CurrentPulse Waveform

Capacitance vs. Reverse Voltage

0 1020304050607080

Peak Pulse Current - IPP (A)

Clamping Voltage - VC (V)

Waveform

Parameters:

tr = 10µs

td = 1000µs

100

110

0 5 10 15 20 25 30

Time (µs)

Percent of IPP

e-t

td = IPP/2

Wavefor

Paramete

tr = 8µs

td = 20µ

100

0.1 1 10 100 1000

Pulse Duration - tp (µ s)

Peak Pu l se Power - Ppk (kW)

100

110

0 25 50 75 100 125 150

Am bient Temperature - TA (oC)

% of Rated Power or I

01234567

Reverse Voltage - VR (V)

C apac ita n ce - C j (pF)

f=1MHz

Clamping Voltage vs. Peak Pulse Current

0 20 40 60 80 100 120 140 160 180 200

Peak Pulse Current - I PP (A)

Clamping Voltage - VC (V)

Waveform

Parameters:

tr = 8µs

td = 20µs

PROTECTION PRODUCTS

LC04-6

Figure 1 - Connection for Differential (Line-to-Line)

Protection of two Tip/Ring Line Pairs

Device Connection Options for Protection of Two

High-Speed Line Pairs

The LC04-6 is designed to protect four high-speed data

lines (two differential pairs) from transient over-volt-

ages which result from lightning and ESD. Protection

of two line pairs is achieved by connecting the device

as follows: Pins 1-4 are connected to line 1 of the first

pair (i.e. Tip 1) and pins 13-16 are connected to line 2

of the first pair (i.e. Ring 1). Pins 5-8 are connected to

line 1 of the second pair (i.e. Tip 2) and pins 9-12 are

connected to line two of the second pair (i.e. Ring 2).

All pins should be connected for best results. Minimize

parasitic inductance in the protection circuit path by

keeping the trace length between the protected line

and the LC04-6 as short as possible.

T1/E1 Linecard Protection

A typical T1/E1 linecard protection circuit is shown in

Figure 2. The LC04-6 is connected between Tip and

Ring on the transmit and receive line pairs. It provides

protection to metallic (line-to-line) lightning and ESD

surges. It is designed to meet the intra-building re-

quirements of Bellcore GR-1089. This design takes

advantage of the isolation of the transformer to

suppress common mode surges. The LC04-6 may also

be configured to meet metallic surges of FCC Part68

when used in conjunction with a 5Ω (minimum) PTC or

line feed resistor (LFR). The PTC (or LFR + fuse) are

required to meet the AC power cross requirements, but

will also reduce the effective surge current to levels

within the capability of the LC04-6 (Table 1). To com-

plete the protection circuit, the SRDA05-4 (or

SRDA3.3-4 for 3.3V supplies) is employed as the IC

side protection element. This device helps prevent the

transceiver from latching up by providing fine clamping

of transients that are coupled through the transformer.

The versatility of the LC04-6 makes it ideal for use with

combination long haul/short haul T1/E1 transceivers.

TIP 1

TIP 2

RING 1

RING 2

Applications Information

Matte Tin Lead Finish

Matte tin has become the industry standard lead-free

replacement for SnPb lead finishes. A matte tin finish

is composed of 100% tin solder with large grains.

Since the solder volume on the leads is small com-

pared to the solder paste volume that is placed on the

land pattern of the PCB, the reflow profile will be

determined by the requirements of the solder paste.

Therefore, these devices are compatible with both

lead-free and SnPb assembly techniques. In addition,

unlike other lead-free compositions, matte tin does not

have any added alloys that can cause degradation of

the solder joint.

PROTECTION PRODUCTS

LC04-6

Typical Applications

Figure 2 - T1/E1 Line Card protection

Table 1

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PROTECTION PRODUCTS

LC04-6

Outline Drawing - SO-16

Land Pattern - SO-16

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2X N/2 TIPS

SEATING

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PLANE

SEE DETAIL A

SIDE VIEW

e/2

0.25

DETAIL A

(L1) 01

GAGE

PLANE

3. DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS

OR GATE BURRS.

-B-

CONTROLLING DIMENSIONS ARE IN MILLIMETERS (ANGLES IN DEGREES).

DATUMS AND TO BE DETERMINED AT DATUM PLANE

NOTES:

2. -A- -H-

REFERENCE JEDEC STD MS-012, VARIATION AC.4.

.050 BSC

.236 BSC

.010

.150

.386 .154

.390

.012 -

0.25

1.27 BSC

6.00 BSC

3.90

9.90

.157

.394 3.80

9.80

.020 0.31

4.00

10.00

0.51

(.041)

.004

.008

.028

0°

.016

.007

.049

.004

.053

8° 0°

0.20

0.10

-8°

0.40

0.17

1.25

0.10

.041

.010

.069

.065

.010 1.35

(1.04)

0.72

1.04

0.25

-1.75

1.65

0.25

.010 .020 0.50

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MIN

MILLIMETERS

DIMENSIONS

NOM

INCHES

MIN

AMAX MAXNOM

THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY.

CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR

COMPANY'S MANUFACTURING GUIDELINES ARE MET.

NOTES:

REFERENCE IPC-SM-782A, RLP NO. 304A.2.

.291

.087

.024

.118

(.205)

INCHES

DIMENSIONS

DIM

MILLIMETERS

.050

(5.20)

7.40

2.20

0.60

3.00

1.27

(C)

PROTECTION PRODUCTS

LC04-6

Contact Information

Semtech Corporation

Protection Products Division

200 Flynn Rd., Camarillo, CA 93012

Phone: (805)498-2111 FAX (805)498-3804

Ordering Information

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Note:

YYWW = Date Code

Marking Diagram

LC04-6

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