U3500BM Processor Datasheet

U3500BM Datasheet, PDF, Equivalent


Part Number

U3500BM

Description

Cordless Telephone Signal Processor

Manufacture

TEMIC Semiconductors

Total Page 17 Pages
Datasheet
Download U3500BM Datasheet


U3500BM
Cordless Telephone Signal Processor
U3500BM
Description
The programmable cordless phone signal processor
includes all necessary low frequency parts such as
microphone- and earphone amplifier, compander, pre-
emphasis, deemphasis, scrambler, data management,
power-supply management, as well as RF receiving parts
such as IF converter, FM demodulator. RSSI and low
noise amplifier.
Several gains and mutes in transmit and receive direction
are controlled by serial bus while compander, pre- and
deemphasis and scrambler can be bypassed.
Features
RF Receiver Part
D Low-noise amplifier
D IF converter
D FM demodulator
D RSSI
Low Frequency Part
D Symmetrical input of microphone amplifier
D Symmetrical output of earpiece amplifier
Block Diagram
MIXO IFIN1 IFIN2
D Compander
D Pre- and deemphasis
D Scrambler
D Data management
D Power-supply management
D Serial bus
Application: CT0
DACO
MIXIN
MIXGND
LOIN
LNAIN
RGND
LNAO
VBATT
C
D
IFAMP
LOG
www.DataSheet4U.com
Demodulator
RGAIN
ADJ
LPF
Oscillator
11.15 MHz
LNA
Divider
D/A
LPF
Serial
Bus
Battery low
detector
LPF
Scrambler
frequency
LPF
TGAIN
ADJ.2
Limiter
LPF Deem
Scrambler
frequency
Expander
REC
MIC
Preem
TGAIN
ADJ.1
Compressor
RXO
ETC
EXIN
RECO2
RECO1
MIC1
MIC2
MICO
RXDAT
TXDAT
COIN
VCC TXO
Figure 1. Block diagram
GND
CTC 14678
Rev. A3, 20-May-98
Preliminary Information
1 (17)

U3500BM
U3500BM
Pin Description
TXO 1
28 TXDAT
CTC 2
27 RXDAT
COIN 3
MICO 4
26 D
25 C
MIC2 5
24 DACO
MIC1 6
23 VCC
GND 7
22 LOIN
RXO 8
21 VBATT
RECO2 9
20 LNAO
RECO1 10
19 RGND
EXIN 11
18 LNAIN
ETC 12
17 MIXGND
IFIN2 13
16 MIXIN
IFIN1 14
15 MIXO
96 11791
Figure 2. Pinning
Order Information
Extended Type Number
U3500BM-BFL
U3500BM-BFLG3
Package
SO28
SO28
Pin Symbol
Function
1 TXO Transmit section analog output
2 CTC Compressor time constant
control analog output
3 COIN Compressor analog input
4 MICO Microphone amplifier output
5 MIC2 Non-inverting input of
microphone amplifier
6 MIC1 Inverting input of microphone
amplifier
7 GND LF analog/ digital ground
8 RXO Intermediate receive analog
output
9 RECO2 Symmetrical output of receive
amplifier
10 RECO1 Symmetrical output of receive
amplifier
11 EMN Expander analog input
12 ETC Expander time constant control
analog output
13 IFIN2 Symmetrical IF amplifier input
14 IFIN1 Symmetrical IF amplifier input
15 MIXO Mixer output
16 MIXIN Mixer input
17 MIXGND IF amplifier and mixer ground
18 LNAIN Low-noise amplifier input
19 RGND Low-noise amplifier ground
20 LNAO Low-noise amplifier output/
External LO input
21 VBATT Battery supply
22 LOIN Local oscillator input
(11.15 MHz)
23 VCC Supply-voltage output for
peripherals and internal supply
of digital part
24 DACO D/A comparator output
25 C Clock input of serial bus
26 D Data input of serial bus
27 RXDAT Receive data digital output
28 TXDAT Transmit data input
Remarks
Taped and reeled
2 (17)
Rev. A3, 20-May-98
Preliminary Information


Features U3500BM Cordless Telephone Signal Proces sor Description The programmable cordle ss phone signal processor includes all necessary low frequency parts such as m icrophone- and earphone amplifier, comp ander, preemphasis, deemphasis, scrambl er, data management, power-supply manag ement, as well as RF receiving parts su ch as IF converter, FM demodulator. RSS I and low noise amplifier. Several gain s and mutes in transmit and receive dir ection are controlled by serial bus whi le compander, pre- and deemphasis and s crambler can be bypassed. Features RF Receiver Part D Low-noise amplifier D I F converter D FM demodulator D RSSI D C ompander D Pre- and deemphasis D Scramb ler D Data management D Power-supply ma nagement D Serial bus Low Frequency Pa rt D Symmetrical input of microphone am plifier D Symmetrical output of earpiec e amplifier Application: CT0 Block Di agram MIXO IFIN1 IFIN2 DACO www.DataShe et4U.com IFAMP MIXIN MIXGND Scrambler frequency LOIN Oscillator 11.15 MHz Divider RECO2 D/A LNAIN RGN.
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