900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




National Semiconductor Electronic Components Datasheet

SC14425 Datasheet

Complete Baseband processor for DECT Base Stations with Caller-id and Handsfree

No Preview Available !

PRELIMINARY
FEBRUARY 2000
SC14425
Complete Baseband processor for DECT Base Stations
with Caller-id and Handsfree
General Description
The SC14425SC14425 is a 3.3 Volt CMOS IC optimized
to handle all the audio, signal and data processing needed
within a DECT base station. An ADPCM transcoder, a
very low power 14 bit Codec and Analog Frontend are in-
tegrated. Direct connections towards analog or ISDN line
interface.
The SC14425 has an on-chip dedicated flexible DSP op-
timized for telecom applications caller-id, handsfree and
allows easy connection to digital telephone answering
machine devices.
The SC14425 is designed to be compatible with many
radio interfaces. A dedicated TDMA controller handles all
physical layer slot formats and radio control. The integrat-
ed National Semiconductor’s standard CR16B processor
core takes care of all the higher protocol stack. Program-
mable I/O ports can be configured as chip selects for I/O
expanders, Serial Flashes, interrupt source or I/O. A dig-
ital serial interface can be configured to interface to indus-
try-standard c odecs and ISDN devices withµ-Law, a-Law,
linear or transparent data formats.
Features
n Integrated DECT base band transceiver optimized for
GAP base stations according to ETS 300 175-2,3 & 8.
n 2.7 to 3.3 Volt operating voltage.
n Embedded 16 bit CompactRISCTM CR16B Microproc-
essor with In System Emulation (ISE) mode.
n On-chip 6kByte Data Memory.
n Embedded flexible dedicated DSP executing Caller-id
(CID), Caller-id on Call Waiting (CIDCW) and hands-
free, two echo cancellers, two echo suppressors, ex-
tended DTMF detection, DTMF generation, sidetone
and artificial echo loss.
n Two full duplex 32 kbits/sec ADPCM transcoder.
n On-chip Dedicated Instruction Processor (DiP) for all
TDMA based events, which supports 1.152MHz,
0.576MHz and 0.288MHz data rates.
n Protected and unprotected full and double slot B-fields
n Standard DECT encryption with different keys for
different MAC-connections.
n At least 6 MAC connections can be handled simultane-
ously.
n Flexible three wire interface to radio front synthesizer.
n One 14-bit linear CODEC with programmable gain
n Peak hold ADC for RSSI measurement
n Two input 8 bit successive approximation ADC.
n Three general purpose I/O ports with programmable in-
terrupts
n Full duplex UART, SPITM and MICROWIRETM interface.
n Flexible 8 kHz synchronous Serial interface to external
codecs and ISDN interface circuits.
n Two general purpose timers and watch dog timer.
n Programmable chip selects to 8 bit wide ROM, SRAM
NAND Flash Memory and I/O expanders.
n Two Capture timers for frequency measurement for
e.g. metering, ringing and call progress tone detection.
n 100 pin TQFP-100 package.
Note 1: CompactRISCTM is a trademark of National Semiconductor Cor-
poration, SPIT M is a trademark of Motorola.
________________________________________________________________________________________________
System Diagram
sc14404
sc14404
sc14404
sc14404
Copyright 2000 National Semiconductor Corp.
sc14425
CID
Handsfree
sc14404
1
ISDN or
Data
Interface
ISDN
PSTN
PSTN1
Interface
PSTN2
PSTN
Interface
www.national.com


National Semiconductor Electronic Components Datasheet

SC14425 Datasheet

Complete Baseband processor for DECT Base Stations with Caller-id and Handsfree

No Preview Available !

1.0 CONNECTION DIAGRAM
SCLK
PD7
PD6
PD5
PD4
PD3
PD2
PD1
VDD
VSS
RFCLK
VDDRF
DAC2
DAC
Xtal1
CAP
AVS
AVD
RSSI
RDI
CMPREF
TDO
MEN1n
SO
SK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
SC14425
75 DAB2
74 DAB 1
73 DAB0
72 AD0
71 AD1
70 AD2
69 AD3
68 P1[6] ACSn INTn6
67 P1[7] HOLDn MI INTn7
66 RSTn
65 AVS2
64 AVD2
63 LRS2+
62 LRS2-
61 VREF2-
60 MIC2-
59 AGND
58 MIC2+
57 VREF2+
56 CAP2+
55 CAP2-
54 N.C.
53 N.C.
52 N.C.
51 N.C.
Order Number SC14425XVJG (Standard version)
X=silicon revision
See NS Package Number VJG100A
Note 1: All digital outputs can sink/source 2 mA unless otherwise specified. All digital inputs are Schmitt trigger types. After reset all I/Os are set to input
and all pull-up or pull-down resistors are enabled unless otherwise specified.
PU = Pull-up resistor enabled, PD = Pull-down resistor enabled, I = input
A-I, B-I = In Boot mode A or B input and pull-up or pull-down resistor disabled,
A-PD, B-PU = In Boot mode A, Pull-down resistor enabled. In Boot mode B, pull-up resistor enabled.
Note 2: Reset state of address and WRn, RDn pins:
Hi-Z/1 means Hi-Z if RSTn is LOW, if RSTn goes HIGH is takes 32 SCLK cycles = 25 usec before these pin drives a ‘1’.
Note 3: 5 Volt protection pads: type *P may NOT be connected to an external pull down resistor
Copyright 2000 National Semiconductor Corp.
2
www.national.com


Part Number SC14425
Description Complete Baseband processor for DECT Base Stations with Caller-id and Handsfree
Maker National Semiconductor
PDF Download

SC14425 Datasheet PDF






Similar Datasheet

1 SC14422 Complete Baseband Processor for DECT Base Stations
National Semiconductor
2 SC14425 Complete Baseband processor for DECT Base Stations with Caller-id and Handsfree
National Semiconductor
3 SC14428 Baseband Processor for FP & PP DECT and WDCT
National Semiconductor





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy