RF 1chip IC for 900 MHz Cordless Telephone
One package involve three systems about RF, IF, and AF.
Involving LNA, MIX, PA, VCO (TX,RX), PLL, IF-AMP, Detecter,
Compander,and 4 useful audio amplifiers. It is possible to reduce
many external parts. This IC is suitable for ISM 900 MHz
cordless telephone.
Features
· Same system & software almost compatible as TB31261AF
(Single Conversion, IF Frequency: 10.7 MHz,)
· Built-in LNA
· Built-in 1’st MIX
® Double Balanced MIX (DBM) Type.
· Built-in Differential VCO, Variable capacitor (TX, RX) and
Doubler (450 MHz ′ 2)
· Built-in PA
· A substitution from TB31261AF is easy
(Same package, Software almost compatible)
· Low operating voltage: VCC = 2.0~5.0 V
· Current operating current: ICC = 70 mA (All On)
· PLL operating frequency :around 450 MHz
· Serial control for all status
· Built in pre-amp, receiver-amp, mic-amp, and spl-amp
· Receiver output Level adjustment.
· Variable battery alarm setting. (7 thresholds)
· Built in battery saving function for Intermittent receiving.
· Small package: QFP52pin (0.65 mm pitch)
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