6

6 - 50

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

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GaAs HBT PROGRAMMABLE

5-BIT COUNTER, DC - 2.2 GHz

v08.0607

General Description

Features

Functional Diagram

The HMC394LP4 & HMC394LP4E are low noise

GaAs HBT programmable 5-bit counters in 4 x 4mm

leadless surface mount packages. This device allows

continuous division from N= 2 to 32 at input frequen-

cies up to 2.2 GHz. The output voltage swing is

800 mV with a duty cycle inversely proportional to N.

The low additive SSB phase noise of -153 dBc/Hz at

100 KHz offset makes this counter an excellent choice

for low noise synthesizer applications.

SSB Phase Noise: -153 dBc/Hz @ 100 kHz

Selectable Division from 2 to 32

Parallel 5-Bit Control

Wide Input Power Range: -20 to +10 dBm

4mm x 4mm Leadless SMT Package

Typical Applications

Programmable divider for offset synthesizer

and variable divide by N applications:

• Satellite Communication Systems

• Point-to-Point and Point-to-Multi-Point Radios

• LMDS

• SONET

Parameter

Conditions

Min.

Typ.

Max.

Units

Maximum Input Frequency

2.2

GHz

Minimum Input Frequency

Sine Wave Input [1]

0.1

GHz

Input Power Range

Fin = 0.1 to 2.2 GHz

-15

>-20

+10

dBm

Output Power

Divide-by-2

4

dBm

SSB Phase Noise

Fin = 1 GHz, N = 4

-153

dBc/Hz

Output Transition Time

100

ps

Supply Current (Icc)

194

mA

1. Divider will operate down to DC for square-wave input signal.