5

Silicon Protection Circuits

205

www .littelfuse .com

TVS Rail Clamp Array in a Surface Mount Package

SP0502AAH, SP0506AAA, SP0506AAB, SP0518AAA

This family of rail clamp or “diode steering” arrays is designed for very

low capacitance ESD protection and is offered in small surface mount

packages. The multi-channel devices are used to help protect high

speed sensitive digital or analog input circuits on data, signal, or control

lines with unipolar voltage levels up to 5 VDC. The state-of-the-art

structure is designed to suppress ESD and other transient over-voltage

events to meet the International Electrotechnical Compatibility (IEC)

transient immunity standards IEC 61000-4-2 for Electrostatic

Discharge Requirements.

The monolithic silicon devices are comprised of specially designed low

capacitance structures for transient voltage suppression (TVS). The size

and shape of these structures have be tailored for transient protection.

The low capacitance and clamp voltage are ideal for high speed signal

line protection.

Ordering Information

Schematic

Part Number

SP0502AAHT

SP0506AAAT

SP0506AABT

SP0518AAAT

Quantity Per

Reel

3000

4000

2500

2500

Package Type

SOT143

MSOP8

SOIC8

QSOP24

CH

2

6

6

18

1

2

3

4

5

6

7

8

9

10

11

12

V

+

CH1 CH2 CH3 CH4 CH5 V

-

CH6 CH7 CH8 CH9 V

+

V

CH13 CH12 CH11 CH10 V

+

24

23

22

21

20

19

18

17

16

15

14

13

1

2

3

4

8

7

6

5

CH 1

CH 2 V

-

CH 3

CH 6

V

+

CH 5

CH 4

SP0518AAAT

SP0506AA

AT

and

SP0506AABT

SP0502AAHT

1

2

3

4

V

+

V-

CH 1

CH 2

Features

• A low capacitance 2, 6 and 18 channel array of rail clamp current

steering diodes in small surface mount packages

• ESD Protection Capability (SP0502 and SP0506)

- IEC 61000-4-2, Direct Discharge . ................. 8kV (Level 4)

- MIL STD 3015.7 . ......................................

15kV

• ESD Protection Capability (SP0518)

- IEC 61000-4-2, Direct Discharge . ................ 15kV (Level 4)

- MIL STD 3015.7 . ......................................

15kV

• Input Protection for Applications Up to 5VDC

• Fast Response Time . .....................................< 1ns

• Low Input Capacitance.............................. .3-7pF

Typical

• Low Clamp Voltage . .................... ......... Vrail + 13V

Max

• Low Input Leakage.................................... .100nA typ

• Operating Temperature Range..................... - 20°C to +85°C

Applications

• Cell phone hand sets

• Personal Digital Assistants (PDA)

• Portable handheld equipment (Laptop, Palmtop computers)

• Computer port, keyboard (USB1.1)

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