SA2532KA PDF даташит
Спецификация SA2532KA изготовлена «Sames» и имеет функцию, называемую «SINGLE CHIP TELEPHONE FOR INDIA». |
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Детали детали
Номер произв | SA2532KA |
Описание | SINGLE CHIP TELEPHONE FOR INDIA |
Производители | Sames |
логотип |
21 Pages
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sames
SA2532KA/B
SINGLE CHIP
TELEPHONE FOR INDIA
Key Features
• Speech Circuit, LD/MF Dialler and Tone Ringer
on one 28 pin CMOS chip
• Low Noise
• 31 digit Last Number Redial
• Line Loss Compensation selectable by pin
option
• 2 Timed Break Recall keys
• Moving Cursor protocol with comparison
• On chip MF filter (CEPT CS 203 compatible)
• Pause key for auto pause or wait function
• Power down mode
• Ring frequency discrimination
• Selectable Loop-Disconnect or DTMF dialling
modes
• Real or complex impedance programmable
• Soft Clipping to avoid harsh distortion
• Uses inexpensive 3.58MHz ceramic resonator
• Operating range from 13 to 100 mA
• 3 Tone melody generator
Block Diagram
General Description
The SA2532K is a CMOS integrated circuit that
contains all the functions needed to form a high
performance electronic telephone.
The device incorporates LD/MF repertory dialling,
melody generation, ring frequency discrimination
and a high quality speech circuit.
Soft switch into temporary MF mode using * when
LD mode is selected .Timed Break Recall will be
available in both LD and MF dialling modes.
A 31 digit Last Number Redial (LNR) memory, with
moving cursor protocol, activated by single key
depression.
Line Loss Compensation whereby send and receive
gains are adjusted (by 6dB) over the ranges
selected by the LLC pin.
DAT_SH02
+
LI LS STB
CS
BJT
LINE
CURRENT
SENSE
+
RI
VDD VDD
VSS
SA2532K
SOFT
CLIP
AGND
RO1
RO2
+
M1
M2
MO
MELODY
TONE
SEQUENCER
GENERATOR
FC1
RING
FREQUENCY
CONTROL
LOGIC
OSC RAM
DISCRIMINATION
MUTE
DIALER
R4
R3
R2
R1
+
HS/DP MODE LLC OSC
MODE_OUT C1 C2 C3 C4
KEYPAD
+
PDS039-SA2532K-001 Rev. C 20-03-00
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SA2532KA/B
Package
Available in 28 pin DIP.
LS 1
28 RI
RO1 2
27 LI
RO2 3
26 VSS
VDD 4
25 CS
AGND 5
24 M2
STB 6
23 M1
CI 7
MO 8
LLC 9
SA2532K 22 MODE
21 FCI
20 R1
HS/DPB 10
19 R2
OSC 11
18 R3
MODE OUT 12
17 R4
C4 13
16 C1
C3 14
15 C2
Figure 1
2 /21 sames
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SA2532KA/B
Pin Description
Pin #
23
24
2
3
5
28
6
1
27
25
4
26
8
21
10
11
12
9
Symbol
M1
M2
RO1
RO2
AGND
RI
STB
LS
LI
CS
VDD
VSS
MO
FCI
HS/DPB
OSC
MODE
OUT
LLC
Function
Microphone Inputs
Differential inputs for the microphone (electret).
Receiver Outputs
These are the outputs for driving a dynamic ear piece with an impedance of
100 to 300Ohms
Analog Ground
This is the analog ground for the amplifiers.
Receive Input
This is the input for the receive signal.
Side Tone Balance Input
This is the input for side tone cancellation.
Line Current Sense Input
This is the input for sensing the line current.
Line Input
This input is used for power extraction and line current sensing.
Current Shunt Control Output
This N-channel open drain output controls the external high power shunt
transistor for the modulation of the line voltage and for shorting the line
during make period of pulse dialling.
Positive Voltage Supply
This is the supply pin for the circuit.
Negative Power Supply
Melody Output
Pulse Density Modulated output of the melody generator for tone ringer. At
high impedance when not active.
Frequency Comparator Input
This is a Schmitt trigger input for ring frequency discrimination. Disabled
during off-hook.
Hook Switch Input and Dial Pulse Output
This is an I/O that is pulled high by the hook switch when off- hook. An
open drain pulls it low during break periods of pulse dialling and flash.
Oscillator Input
Oscillator pin for Xtal or ceramic resonator (3.58 Mhz). Recommended :
Murata CSA 3.58MG312AM
Mode Output.
An Output pin designed to drive a low power LED. Active whenever MF
dialling mode is selected.
Line Loss Compensation.
Select pin for the line loss compensation:
Open
None
Low 20-50mA
High
45-75mA
3 /21 sames
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DataSheet26.com | 2020 | Контакты | Поиск |