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SA1921 Datasheet, PDF (5/36 Pages) NXP Semiconductors – Satellite and cellular dual-band RF front-end
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Philips Semiconductors
Satellite and cellular dual-band RF front-end
Product specification
SA1921
Table 1. POWER DOWN CONTROL
Control State
(Hi/Lo, Syn On, Rx On, Tx On, Strong Signal)
x000x Sleep
01000 Low-Band LO Buffer on
01100 Low-Band Receive Normal
01101 Low-Band receive Strong Signal
01110 Low-Band Transmit (Analog only)
01010 N/A
11000 High-Band LO Buffer On
11100 High-Band Receive Normal
11101 High-Band Receive Strong Signal
11010 N/A
NOTE:
1. “0” is low logic state; “1” is high logic state.
LO BUFFER
High Low
Band Band
Off
Off
Off
On
Off
On
Off
On
Off
On
Off
On
On
Off
On
Off
On
Off
On
Off
LNA
High Low
Band Band
Off
Off
Off
Off
Off
On
Off
Off
Off
On
High Bias
Off
Off
Off
Off
On
Off
Off
Off
Off
Off
MIXER
High Low
Band Band
Off
Off
Off
Off
Off
On
Off
On
Off
On
Off
Off
Off
Off
On
Off
On
Off
Off
Off
TX MIXER
DRIVER
High Low
Band Band
Off
Off
Off
Off
Off
Off
Off
Off
Off
On
Off
On
Off
Off
Off
Off
Off
Off
On
Off
1999 Mar 02
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