For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824

Phone: 978-250-3343

Fax: 978-250-3373

Order On-line at www.hittite.com

Application Support: Phone: 978-250-3343 or apps@hittite.com

9

HMC987LP5E

v01.0512

LOW NOISE 1:9 FANOUT BUFFER

DC - 8 GHz

Table 2. Pin Descriptions

Pin number

Function

Description

1

VCCHF

Power supply

2

ClkP

Differential clock inputs

3

Clkn

4

sDi

serial port data input

5

sDo

serial port data output

6

PMoDE-sEl

Parallel mode select. if 1, pins (sClk, sDi, sEn) are interpreted as a control-word which enables

different buffers. see section “Parallel Port Control”

7

rFoutP

Differential signal output

8

rFoutn

9

VCCrF

Power supply

10

sClk

serial port clock

11

sEn

serial port latch enable

12

outP8

Differential signal output

13

outn8

14

outP7

Differential signal output

15

outn7

16

VCCb

Power supply

17

outn6

Differential signal output

18

outP6

19

outn5

Differential signal output

20

outP5

21

outP4

Differential signal output

22

outn4

23

outP3

Differential signal output

24

outn3

25

VCCA

Power supply

26

outn2

Differential signal output

27

outP2

28

outn1

Differential signal output

29

outP1

30

rFbuFEn

Active high rF buffer enable. the polarity of this control input can be swapped via sPi bit

reg03h[4].

31

CEn

Hardware chip enable

32

nC

no Connect