10

10 - 172

For price, delivery, and to place orders, please contact Hittite Microwave Corporation:

20 Alpha Road, Chelmsford, MA 01824 Phone: 978-250-3343 Fax: 978-250-3373

Order On-line at www.hittite.com

GaAs MMIC SP8T NON-REFLECTIVE

POSITIVE CONTROL SWITCH, DC* - 8 GHz

v03.0805

General Description

Features

Functional Diagram

The HMC321LP4 & HMC321LP4E are broadband non-

reflective GaAs MESFET SP8T switches in low cost

leadless surface mount packages. Covering DC to

8 GHz, this switch offers high isolation and low inser-

tion loss. This switch also includes an on board binary

decoder circuit which reduces the required logic con-

trol lines to three. The switch operates using a positive

control voltage of 0/+5 volts, and requires a fixed bias

of +5v. This switch is suitable for usage in 50-Ohm or

75-Ohm systems.

Broadband Performance: DC - 8 GHz

High Isolation: >30 dB@ 6 GHz

Low Insertion Loss: 2.5 dB@ 6 GHz

Integrated Positve Supply 3:8 TTL Decoder

4x4 mm SMT Package

Typical Applications

This switch is suitable for usage in DC - 8.0 GHz 50-

Ohm or 75-Ohm systems:

• Broadband

• Fiber Optics

• Switched Filter Banks

• Wireless below 8 GHz

* DC blocking capacitors are required at ports RFC and

RF1, 2, 3, 4, 5, 6, 7, 8. Their value will determine the lowest

transmission frequency.

Parameter

Frequency

Min.

Typ.

Max.

Units

Insertion Loss

DC - 2.0 GHz

DC - 4.0 GHz

DC - 8.0 GHz

2.3

2.5

2.7

2.7

2.9

3.1

dB

dB

dB

Isolation

DC - 2.0 GHz

DC - 4.0 GHz

DC - 6.0 GHz

DC - 8.0 GHz

35

30

25

20

40

35

30

25

dB

dB

dB

dB

Return Loss

“On State”

DC - 4.0 GHz

DC - 8.0 GHz

8

7

12

10

dB

dB

Return Loss (RF1 - RF8)

“Off State”

2.0 - 8.0 GHz

7

12

dB

Input Power for 1 dB Compression

0.5 - 8.0 GHz

19

23

dBm

Input Third Order Intercept

(Two-tone Input Power = +7 dBm Each Tone, 1 MHz Spacing)

0.5 - 8.0 GHz

33

40

dBm

Switching Characteristics

tRISE, tFALL (10/90% RF)

tON, tOFF (50% CTL to 10/90% RF)

DC - 8.0 GHz

50

150

ns

ns