AK2358F Datasheet, PDF (2/26 Pages) Asahi Kasei Microsystems – Base-band LSI for Europian Cordless Telephones(CTI, CTI+)

ASAHI KASEI
[AK2358FI
Base-band 1S1 for kopian Cordless Telephones(CTl, CT1+)
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Features
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•1 Meets to the specification of the europian cordless telephones (CT1, CT1+)
•1 Built-in voice filter for cordless telephone, MSK MODEM (2400bps), COMPANDOR, and
scrambler circuit
•1 Low / wide operation voltage range (1.9 V to 5.5V)
•1 Built-in COMPANDOR output transient response circuit and time constant circuit
•1 No external component is needed for COMPANDOR
•1 Built-in buffer amplifier for ceramic receiver driving.
•1 Built-in electronic volume for microphone sensitivity and modulator/demodulator
sensitivity
•1 Receiving level switchable in 8 steps (-12 to +9dB)
•1 Built-in u uting function for voice transmitting and receiving
•1 External adjustment for the limiter level
•1 Built-in amplifier for transmission and reception gain adjustment
•1 Low power CMOS and power-down function
u Built-in 3.58MHz oscillator circuit
•1 Scrambler circuit with frequency inversion. ^{Two inversion frequencies can be}
selected.
•1 Bypassing the scrambler circuit available
u Built-in frame detection function for the MSK demodulator
u Control register and MSK MODEM data buffer controlled by serial interface
•1 Few external component is necessary resulting cost reduction and small set size.
El Package: 24 pin VSOP
Block Diagram
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IT Data/Rx Data
Control data
(
!rane d e t e c t i o n
Receiver
\ control register
i and data buffer
!4S1 MODEM
splatter f i lter
Transmission signal
output
3 .58NHz
Reception signal
input
0152 E 00
Eecept inn nutput
1996/12