參數(shù)資料
型號： SA1921-T
廠商： NXP SEMICONDUCTORS
元件分類： 無繩電話/電話
英文描述： TELECOM, CELLULAR, RF FRONT END CIRCUIT, PQFP48
封裝： 7 X 7 X 1.40 MM, PLASTIC, QFP-48
文件頁數(shù)： 32/36頁
文件大?。?/td> 521K
代理商： SA1921-T
Philips Semiconductors
Product specification
SA1921
Satellite and cellular dual-band RF front-end
1999 Mar 02
5
Table 1. POWER DOWN CONTROL
LO BUFFER
LNA
MIXER
TX MIXER
DRIVER
Control State
(Hi/Lo, Syn On, Rx On, Tx On, Strong Signal)
High
Band
Low
Band
High
Band
Low
Band
High
Band
Low
Band
High
Band
Low
Band
x000x
Sleep
Off
01000
Low-Band LO Buffer on
Off
On
Off
01100
Low-Band Receive Normal
Off
On
Off
On
Off
On
Off
01101
Low-Band receive Strong Signal
Off
On
Off
On
Off
01110
Low-Band Transmit (Analog only)
Off
On
Off
On
High Bias
Off
On
Off
On
01010
N/A
Off
On
Off
On
11000
High-Band LO Buffer On
On
Off
11100
High-Band Receive Normal
On
Off
On
Off
On
Off
11101
High-Band Receive Strong Signal
On
Off
On
Off
11010
N/A
On
Off
On
Off
NOTE:
1. “0” is low logic state; “1” is high logic state.
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