ZLNB1001N8TC Diodes Zetex, ZLNB1001N8TC Datasheet - Page 3

• Manufacturer Part Number: ZLNB1001N8TC
• Description: IC MUX CTLR TONE/POLARITY 8SOIC
• Manufacturer: Diodes Zetex

Specifications of ZLNB1001N8TC

• Function: Polarity Multiplexer
• Rf Type: LNB, DiSEqC™ , STBs
• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Typical application circuit using pin diodes
Application information
The schematic diagram above shows the typical application driving RF signal PIN diodes. Values
of suitable external components are shown. R1 R2 and C1 are required to achieve specified
operation. Values of other components are typical of the application. When one signal path is
selected according to the Truth Table, the selected signal diodes carry a forward current set by R3.
The other signal diodes are biased off, R3 providing a degree of reverse bias.
In order to limit the peak current in the device, it is recommended that the output decoupling
capacitor value, including C2, C3, C4 and C5, should not be excessive. Normally this total is
expected to be less than a few hundred pF in the intended application.
Issue 1 - September 2005
© Zetex Semiconductors plc 2005
Input, high band horiz
Input, high band vert
Input, low band horiz
Input, low band vert
R1
R2
C1
4.7nF
47R
1k
1
2
3
4
U1
ZLNB1001
VIN
VPOL
FIN
GND
VOUT4
VOUT3
VOUT2
VOUT1
8
7
6
5
C2
C3
C4
C5
47pF typical
47pF typical
47pF typical
47pF typical
3
R3
1k
typical
ZLNB1001
www.zetex.com
C11 47pF typical
IF out