AS2536P [AMSCO]
Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping; 多标准CMOS单芯片IC电话与双软剪辑
| 型号： | AS2536P |
| 厂家： | 
AMS(艾迈斯) |
| 描述： | Multi-Standard CMOS Single Chip Telephone IC with Dual Soft Clipping |
| 文件： | 总25页 (文件大小：274K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
Data Sheet
AS2533...6
Multi-Standard CMOS Single Chip
Telephone IC with Dual Soft Clipping
®
Austria Mikro Systeme International AG
General Description
The AS253x is a CMOS integrated circuit that contains
all the functions needed to form a high performance
electronic telephone.
Key Features
❑ Line/speech circuit, LD/MF repertory dialler and
tone ringer on one 28 pin CMOS chip
❑ Operating range from 13 to 100 mA (down to 5 mA
with reduced performance)
❑ Soft clipping to avoid harsh distortion
❑ Volume control of receive signal
❑ Line loss compensation selectable by pin option
❑ Low noise (max. - 72 dBmp)
❑ Real or complex impedance
❑ NET 4 compatible
❑ LD/MF switchable dialling
❑ Pacifier tone during programming
❑ 31 digit last number redial
❑ Repertory memories (not AS2534), 4 direct/10
indirect (AS2533/6), 12 direct (AS2535)
❑ Repeat dialling by busy or engaged (not AS2535)
❑ Sliding cursor protocol with comparison
❑ Pause key for access pause or wait function
❑ 3 flash keys, 100 ms, 280 ms and 375/600 ms
❑ On chip MF filter (CEPT CS 203 compatible)
❑ Ring frequency discrimination
ThedeviceincorporatesLD/MFrepertorydialling,melody
generation, ring frequency discrimination and a high
quality line/speech circuit.
A RAM is on chip for a 31 digit last number redial and
memories (not AS2534) each containing up to 21 digits/
data. The sliding cursor procedure makes the LNR
function easy to use under various PABX systems. Also
centrex keys (not AS2535) are provided.
Thedeviceincorporateavolumecontrolfortheearpiece.
The volume can be controlled by the VOL key (+ 5.4 dB)
or by the –/+ keys (+8.1 dB/-5.4 dB in 5 steps).
The versatility of the circuit is provided by pin options
and a few external components. This allows easy
adaptation to different PTT requirements.
❑ 3-tone melody generator
Package
Available in 28 pin SOIC or DIP.
Block Diagramme
La
Z2
Z
BAL
Z1
Lb
RI
LED
LI
CI
LS
STB
AGND
RO
CS
LINE
CURRENT
SENSE
LINE ADAPTATION
POWER EXTRACTION
DC MASK
SOFT CLIP
AGC
M2
M1
V
DD
V
DD
Vss
MO
AS253x
R4
R3
MUTE
MELODY
SEQUENCER
TONE
GENERATOR
RAM
DIALLER
R2
R1
FCI
RING
FREQUENCY
DISCRIMINATION
CONTROL
LOGIC
OSC
OSC
MFL
C1
C2
C3
C4
HS/DP
LLC
MODE
3.58
MHz
LLC Hi
LLC Lo
LLC Off
KEY
PAD
A
GND
1
July 1998
Rev. 7
Data Sheet
AS2533...6
Pin Description
Pin #
Symbol
Function
23
24
M1
M2
Microphone Inputs
Differential inputs for the microphone (electret).
3
5
RO
AGND
RI
Receive Output
This is the output for driving a dynamic earpiece with an impedance of 140 to 300 Ω.
Analogue Ground
This is the analogue ground for the amplifiers.
28
6
Receive Input
This is the input for the receive signal.
STB
LS
Side Tone Balance Input
This is the input for side tone cancellation.
1
Line Current Sense Input
This is the input for sensing the line current.
27
25
LI
Line Input
This input is used for power extraction and line current sensing.
CS
Current Shunt Control Output
This N-channel open drain output controls the external high power shunt transistor for the
modulationofthelinevoltageandforshortingthelineduringmakeperiodofpulsedialling.
4
VDD
Positive Voltage Supply
This is the supply pin for the circuit.
26
8
VSS
Negative Power Supply
MO
Melody Output
PDM output of the melody generator for tone ringing. Hi-Z when not active.
21
10
FCI
Frequency Comparator Input
This is a Schmitt trigger input for ring frequency discrimination. Disabled during off-hook.
HS/DP
Hook Switch Input and Dial Pulse Output
This is an I/O that is pulled high by the hook switch when off-hook and an open drain pulls
it low during break periods of pulse dialling and flash.
11
9
OSC
LLC
Oscillator Input
Pin for ceramic resonator (3.58 MHz). Recommended: Murata CSA 3.58MG312AM.
Line Loss Compensation
Select pin for line loss compensation (see also figure 4 to 7).
LLC = AGND: 20 - 50 mA
LLC = VDD: 45 - 75 mA
LLC = VSS: none.
22
LED
LED Output Driver
Output for driving an LED that will be flashing when in Programme/Mute state.
Continues…
Rev. 7
2
July 1998
Data Sheet
AS2533...6
Pin Description cont´d
Pin #
Symbol
Function
12
MODE
Signalling Mode Select Input
Mode pin
Open
Function
Dialling inhibited
Row 1
Row 2
Row 3
Row 4
Row 5
Row 6
Row 7
LD mode, 10 pps, 33/66 ms
LD mode, 10 pps, 40/60 ms
LD mode, 20 pps, 33/66 ms
LD mode, 20 pps, 40/60 ms
LD mode, 10 pps, 33/66 ms, Temp. MF with tone on first * key entry
MF only, 82/82 ms
MF only, 82/160 ms
During temporary MF: 82/160 ms
20
19
18
17
R1
R2
R3
R4
Keyboard Rows
(see key arrangement in figure 2)
16
15
14
13
C1
C2
C3
C4
Keyboard Columns
(see key arrangement in figure 2)
7
2
CI
Complex Impedance Pin
For complex impedance a capacitor should be connected to this pin.
MFL
MF Level Setting
A voltage divider connected from this pin to AGND and VSS can be used to set the DTMF
level.
Selection Overview
Function
Direct memories (one-key)
Indirect memories (two-key)
Repeat dialling
LNR key
Pause insertion by LNR key
Pause (PS) key
AS2533
4
AS2534B
0
AS2534E
0
AS2535
12
AS2536
4
10
yes
yes
yes
yes
P/M
yes
yes
yes
yes
yes
yes
600 ms
0
0
0
no
10
yes
yes
yes
yes
P/M
yes
yes
yes
yes
no
yes
yes
yes
yes
MT
yes
yes
yes
yes
no
yes
yes
yes
yes
P/M
yes
yes
yes
yes
no
yes
yes
no
P/M
no
yes
no
yes
yes
yes
600 ms
P/M or MT key
Tone/Pulse (T/P) key
Temperary MF by * key
Centrex (A - D) keys
Volume (VOL, –/+) keys
Volume reset by off-hook
Programming of tone ringer
R3 Flash duration
yes
600 ms
no
375 ms
yes
600 ms
3
July 1998
Rev. 7
Data Sheet
AS2533...6
(Either VOL or +/– keys)
Keyboard Connections
Key closure, RON max. = 1 kohm
Key open, ROFF min. = 1 Mohm
C1
C2
C3
C4
P/M
P/M
1
2
3
3
R1
R2
1
2
4
4
5
5
6
6
7
7
8
9
0
0
8
9
*
R3
R4
*
#
#
R1
R1
R2
R2
R3
R3
LNR
LNR
VOL
VOL
+
+
–
–
A
A
B
B
C
C
D
D
RP
RP
PS
PS
T/P
T/P
M1
M1
M2
M2
M3
M3
M4
M4
MR
MR
Figure 2a (AS2533/6)
For AS2534E
P/M is MT key.
C1
C2
C3
C4
P/M
P/M
1
2
3
3
R1
R2
1
2
4
4
5
5
6
6
7
7
8
9
0
0
8
9
*
R3
R4
*
#
#
R1
R1
R2
R2
R3
R3
LNR
LNR
VOL
VOL
+
+
–
–
A
A
B
B
C
C
D
D
RP
RP
PS
PS
T/P
T/P
Figure 2b (AS2534)
4
July 1998
Rev. 7
Data Sheet
AS2533...6
Keyboard Connections Continued
(Either VOL or +/– keys)
C1
C2
C3
C4
P/M
P/M
1
2
3
3
R1
R2
1
2
4
4
5
5
6
6
7
7
8
9
0
0
8
9
*
R3
R4
*
#
#
R1
R1
R2
R2
R3
R3
LNR
LNR
VOL
VOL
+
+
–
–
M1
M1
M2
M2
M3
M3
M4
M4
M5
M5
M6
M6
M7
M7
M8
M8
M9
M9
M10
M10
M11
M11
M12
M12
Figure 2c (AS2535)
the device not operating is in a power down mode to
save current. The CS pin is pulled to VSS in order to turn
the external shunt transistor on to keep a low voltage
drop at the LS pin during make periods.
Power On Reset
The on chip power on reset circuit monitors the supply
voltage (V ) during off-hook. When V rises above
DD
DD
approx. 1.2V, a power on reset occurs which clears the
RAM.
AC Impedance
The ac impedance of the circuit is set by external
components. The impedance can be real or complex.
The ac impedance is determined as follows:
DC Conditions
The normal operating range is from 13 mA to 100 mA.
Operatingrangewithreducedperformanceisfrom5mA
to 13 mA (parallel operation). In the operating range all
functions are operational.
ZAC = 33• Z1
The dc value of Z1 should be 30 Ω to maintain correct dc
performance.
At line currents below 13 mA the AS253x provides an
additional slope below 4.5V in order to allow parallel
operation (see figure 13).
Returnlossandsidetonecancellationcanbedetermined
independant of each other.
The dc characteristic (excluding diode bridge) is
determinedbythevoltageatLIandtheresistorR1atline
currents above 13 mA as follows:
Speech Circuit
The speech circuit consists of a transmit and a receive
pathwithdualsoftclipping,mute,linelosscompensation
and sidetone cancellation.
VLS = VLI + ILINE R1
The voltage at LI is 4.5V in the normal operating range.
Transmit
The gain of the transmit path is 37 dB for 600 Ω line
terminationfromM1/M2toLS(seetestcircuitfigure10).
During pulse dialling the speech circuit and other part of
5
July 1998
Rev. 7
Data Sheet
AS2533...6
The microphone input is differential with an input
Line Loss Compensation
impedance of 20 kΩ.
The line loss compensation is a pin option. When it is
activated, the transmit and receive gains are decreased
by6dBatlinecurrentsfrom20to50mAwhenLLC=AGND
and 45 to 75 mA when LLC = high (@ R1 = 30 Ω). The
line loss compensation is disabled when LLC = low (see
figure 4 and 5).
The soft clip circuit limits the output voltage at LI to 2V
PEAK
(see figure 12). The attack time is 30 µs/6 dB and the
decay time is 20 ms/6 dB. When mute is active, during
dialling or after pressing the P/M key, the gain is
reduced by > 60 dB.
Dialling Functions
Receive
The gain of the receive path is 3 dB for 600 Ω line
termination (test circuit figure 10). The receive input is
thedifferentialsignalofRIandSTB.Whenmuteisactive
during dialling the gain is reduced by > 60 dB. During
DTMF dialling a MF comfort tone is applied to the
receiver. The comfort tone is the DTMF signal with a
level that is -30 dB relative to the line signal.
Valid Keys
The key scanning is enabled when HS/DPN is pulled
highandV isaboveV .Avalidkeyisdetectedfromthe
DD
REF
keyboard by connecting the appropriate row to the
column (RON < 1 kΩ). This can be done using an n x m
keyboard matrix with single contacts. Four diodes are
used to extend the number of rows (see keyboard
arrangement fig. 2). It is also possible to connect a
µcontroller to the rows and columns (see application
note AN3010).
The receive gain can be changed by pressing the
volume keys. The VOL key gives a +5.4 dB boost and
has a toggle function, i.e. repressing the key resets the
gain to default. As an alternative the +/– keys can be
used. The + key increases the gain by 8.1 dB in 3 steps
and the – key decreases the gain by 5.4 dB in 2 steps
(total range 13.5 dB). On AS2533/5 the volume is reset
to default by next off-hook and on AS2534/6 the volume
settingwillremainatlastsetting.APORwillalwaysreset
the volume to default.
P/M and MT Key
The P/M key (not AS2534E) is used to enter the
Programme/Mute state and the MT key for muting
(AS2534E only). Depressing the P/M key mutes the
speech circuit and the device is in programme state.
Repressing the P/M key deactivates the mute and
programme state (toggle function).The MT key works in
a similar way, but has no programme function.
The soft clip circuit limits the voltage at the receive
output (RO) to 1VPEAK (see figure 11). It prevents harsh
distortion and acoustic shock.
When programme/mute is activated, the LED indication
is turned on (flashing: 80 ms 'on' and 1 sec 'off').
Sidetone
Dial Mode Selection
A good sidetone cancellation is achieved by using the
following equation:
The default mode (LD or MF) can be selected by the
modepin.WhendefaultLDmodeisselected,atemporary
change to MF can be invoked by pressing T/P key (not
AS2535) or the * key (when mode pin = row 5, the MF
tone is generated with the first * key entry). The circuit
will revert to LD by repression the T/P key (not AS2535)
or by pressing the R (R1, R2 or R3) key or by next on-
hook.
ZBAL
Z 2
Z1
=
ZLINE
The sidetone cancellation signal is applied to the STB
input.
When MF mode is selected by the mode pin, the circuit
can not be changed temporary to LD but will remain in
MF mode.
Z1
ZLINE
Centrex Keys (not AS2535)
Thealphamerickeysaccommodateeasyuseofcentrex
services. The A, B, C and D keys are only valid in MF
mode (including temporary MF) and are not storable.
Pressing one of these keys will invoke the appropriate
MF tones to be transmitted.
ZBAL
Z2
Figure 3
Side Tone Balance
6
July 1998
Rev. 7
Data Sheet
AS2533...6
The centrex keys are not stored in the RAM, and
subsequently entered digits are buffered in FIFO.
Last Number Redial
LNR is a facility that allows resignalling of the last
manually dialled number without keying in all the digits
again. The LNR is repeatable after each off-hook.
Memory Keys (not AS2534)
The keys M1 to M12 are direct memory access keys and
the MR key (AS2533/6 only) is used for abbreviated
dialling.
Memory arrangement AS2533/6 AS2534 AS2535
Storable numbers
Direct memory keys
Indirect memories
14
4
10
0
0
0
12
12
0
The current content of the RAM is overwritten by new
entries.
A manually entered number is automatically stored in
the LNR RAM. The capacity of the RAM is 31 digits. If a
numbergreaterthan31digitsisentered, theLNRfacility
will be inhibited (until new entries < 32 digits) and further
entries will be buffered in FIFO.
In the on chip RAM, numbers can be stored. Each
number can contain up to 21 digits (including pauses).
Duringprogrammingmultiplepausescanbeinsertedby
pressing the PS (not AS2535) or the LNR key. Each
pauseinsertedwithinthefirst5entrieswillautomatically
be terminated after 2 seconds whereas pauses inserted
after location 5 in a digit string will halt dialling and can
beterminatedmanuallybypressingthePS(notAS2535)
or the LNR key. The halt function allows in-dialling to an
extention on a PABX.
Pauses can be inserted by pressing the PS key (not
AS2535).
Post dialled digits, i.e. digits manually entered after LNR
has been invoked, are not stored in RAM but buffered in
FIFO.
Example (45678–123 is stored in M1, where – is a
pause/wait and 123 the extention number):
Repeat Dialling (not AS2535)
The last manually dialled number can be repeated
without going on-hook by pressing the RP key. If a
called number is engaged, pressing the RP key will
break the line for 1.6 second (to get a new dial tone) and
after a pause the number will be repeated.
off-hook, wait for dial tone
press M1 (45678 is dialled out)
await dial tone from called PABX
press PS or LNR (123 is dialled out).
The repeat function is enabled when prior to pressing
the RP key, a number has been dialled, and it can be
invokedanunlimitednumberoftimesuntilnexton-hook.
Duringthe1.6secondbreakthedeviceisinpowerdown
mode to save current.
Memory dialling is cascadable. However, the content of
one memory must be dialled out before a new can be
invoked.
Sliding Cursor Procedure
To accommodate easy and uncomplicated redialling
(LNR) behind a PABX, a sliding cursor protocol is
implemented. If new entries match the previous RAM
contents,pressingtheLNRkeywilldialouttheremaining
digits.
Recall Function
A recall (R1, R2 or R3 key) activation will invoke a flash
(timed loop break), however, the R1 flash is never
executed in LD mode. R2 and R3 will be executed
independent of the mode.
If there is an error in matching, the LNR will be inhibited
until next on-hook, and the RAM will contain the new
number.
If recall is the first entry in a digit string, it will be stored
in LNR RAM when digit(s) are entered after the recall.
If the recall key is depressed after a digit string has been
entered or dialled out, the recall will not be stored but
bufferedintheFIFOtogetherwithsubsequentlyentered
digit.
Example (LNR content 912345, where 9 is access
code):
off-hook, wait for PABX dial tone
press 9 and wait for external dial tone
press LNR (12345 will be dialled out).
If pressing the recall key is not followed by digit entries,
the LNR RAM remains intact.
Tone Generator
The tone generator incorporates the DTMF tones, 3
basic frequencies for the tone ringer and pacifier tones.
After a recall a 270 ms pause will automatically be
executed.
7
July 1998
Rev. 7
Data Sheet
AS2533...6
DTMF
The DTMF generator provides 8 frequencies, namely:
The procedure is ended by repressing the P/M key.
Low group
The default setting is digit 6, i.e. after a power on reset
thedevicewillstartupwithrepetitionrate4andmaximum
volume. If digit 0 is programmed, the tone ringer will be
turned off until next off-hook where it will turn back to the
last setting before 0. The programmed settings are
stored in the on chip RAM.
Digit 1-2-3-A
Digit 4-5-6-B
Digit 7-8-9-C
Digit * -0-# -D
697 Hz
770 Hz
852 Hz
941 Hz
High group
Digit 1-4-7- *
Digit 2-5-8-0
Digit 3-6-9-#
Digit A-B-C-D
1209 Hz
1336 Hz
1477 Hz
1633 Hz (not AS2535)
Repetition rate means that a sequence of 6 frequencies
is repeated 1, 4 or 10 times within 1 second.
The sequence of the frequencies is controlled by the
sequence register as follows:
The MF output level can be set with an external voltage
divider on pin MFL.
Sequence F1 F2 F3 F1 F2 F3 …
Voltage at pin MFL (2) DTMF Level (Low Group)
The AS2534E is fixed to default settings and can not be
programmed to other settings.
1.50 V (AGND
)
-4.0 dBm
-5.2 dBm
-6.4 dBm
-7.6 dBm
-8.8 dBm
-10.0 dBm
-11.2 dBm
-12.4 dBm
-13.6 dBm
-14.8 dBm
-16.0 dBm
1.27 V
1.15 V
1.03 V
0.90 V
0.70 V
0.54 V
0.42 V
0.30 V
0.18 V
0.00 V (VSS)
Pacifier Tone
By MF dialling the DTMF tones are provided to the
earpiece as comfort tone.
During programming a key entry is acknowledged by a
pacifier tone of 1477 Hz. The level of the pacifier tone is
approximately 60 mV at the RO output. The duration is
40 ms after every key entry in programme mode.
(ZLINE = 600 ohm)
When terminating the programme mode with the P/M
key an acknowledge tone of 140 ms is provided. An
invalid key entry, however, will cause a termination of
the programme mode indicated by a rejection tone of 4
times40mswith28mspausesbetweenthetonebursts.
The preemphasis is 2.6 dB.
TheMFtonesareaccordingtoCEPTrecommendations.
Tone Ringer (Melody/Volume)
The three basic frequencies of the melodies are:
Ring Frequency Discrimination
Theringfrequencydiscriminatorassuresthatonlysignals
with a frequency between 13Hz and 70 Hz are regarded
asvalidringsignals. Thetimeforrecognisingavalidring
signal is 1/f seconds, where 'f' is the ring frequency.
F1 = 800 Hz, F2 = 1067 Hz, and F3 = 1333 Hz (± 5%).
The repetition rate and the volume of the tone ringer
melodies can be programmed by pressing P/M and #
followed by a digit as follows (not AS2534E):
Whenavalidringsignalispresentfor73mscontinuously,
the melody generator is activated and remains active as
long as the ring signal is present.
Digit Repetition Rate
Volume
- 16 dB
- 7 dB
0 dB (max.)
- 16 dB
- 7 dB
0 dB (max.)
- 16 dB
- 7 dB
0 dB (max.)
Off
1
2
3
4
5
6
7
8
9
0
1 time (50 ms pause)
1 time (50 ms pause)
1 time (50 ms pause)
4 times
4 times
4 times (default)
10 times
10 times
10 times
None
Once the melody generator has been started, the ring
signal is continuously monitored and the melody
generator is instantly turned on or off according to the
momentary presence of a valid or unvalid ring signal
respectively (until next POR or off-hook).
8
July 1998
Rev. 7
Data Sheet
AS2533...6
Typical Characteristics of Line Loss Compensation
Fig. 4
(dB) Tx Gain
35
34
LLC = VSS
LLC = AGND
LLC = VDD
33
32
31
f = 800 Hz
LINE = 600Ω
VLS = -10 dBm
Z
30
29
DC Line
Current
20
30
40
50
60
70
80
(mA)
Fig. 5
(dB) Rx Gain
+4
+3
LLC = VSS
LLC = AGND
LLC = VDD
+2
f = 800 Hz
ZLINE = 600Ω
VLS = -10 dBm
VOL = 0 dB (neutral)
+1
0
-1
-2
DC Line
Current
20 30
40
50
60
70
80
(mA)
9
July 1998
Rev. 7
LLC &
VOLUME
SC
COMFORT
TONES
–
26dB
–
RO
0 dB
+
10dB
+
ZBAL
(10 x ZLINE
ZLINE
)
80 k
8 k
DTMF
STB
RI
LI
ZREF
300Ω
30Ω
LLC & SC
+
20 k
20 k
M1
M2
–
23dB
+
–
CS
ZSYN
(970Ω)
12dB
+
PRIVACY
MUTE
CI
32.3 x ZREF
Data Sheet
AS2533...6
Typical Application
Complex Impedance
(270 Ω + 750 Ω // 150 nF)
Figure 9
Only the components
necessary for
presenting the
complete functions of
the AS253X are
included.
The external components
might change to comply
with various national PTT
regulations and to interface
to different transducers.
Since the AS253x is a
component and not a complete
system, it can not be approved
as a stand alone part by the
standard bodies. Hence, full
conformance to any standards
is depending on the application
in which the AS253x is being
used, and therefore, approvals
by the standard bodies are the
responsibility of the customer
and Austria Mikro Systeme will
not have tested the product to
meet specific standards.
For further application
information please refer to
application note AN2201.
11
July 1998
Rev. 7
Data Sheet
AS2533...6
Operating Procedures
Procedure Principles
The procedures for utilizing the features of the AS253x are optimized out of consideration for the human factor in
order to:
- meet the user´s expectations
- be easy to learn and relearn
- not invoke any automatic functions which the user doesn´t expect
- protect the user from committing critial errors, e.g. dialling wrong numbers, deleting stored numbers, etc.
- be consistent, simple and usable.
The following pages describe the operating procedures for the provided features. Pressing an unvalid key or key
combination during programming will cause the device to abort the programme state. Pressing any key
combination or sequence which is not described or defined may cause the device to enter a state or mode that
does not comply with the expectation of the user. In such cases, any undesired state can be terminated at any time
by going on-hook / off-hook which will generate a functional reset.
Symbols
STATES
ENTRIES
Going off-hook
PROCESSING
Idle (on-hook,
no ringing)
X
sec
Time out (x sec.)
Going on-hook
Pressing a key
Dialling
(LD or MF)
or
Speech mode
Privacy mute
KEY
Storing (writing
into RAM)
Entering a
number
Processing
according to text
Programming
TEXT
Entry according
to text
TEXT
False programme
entry
reading from
memory
Invalid entry
State according
to text
TEXT
12
July 1998
Rev. 7
Data Sheet
AS2533...6
Programming Tone Ringer
(not AS2534E)
P/M
Programme State
Speech circuit muted
LED flashing
Any invalid key
M1-12
#
entry will abort
programme
state
MR
Storing
Numbers
Storing
Numbers
Digit Repetition Rate
Volume
- 16 dB
- 7 dB
0 dB (max.)
- 16 dB
- 7 dB
0 dB (max.)
- 16 dB
- 7 dB
0 dB (max.)
Off *
1
2
3
4
5
6
7
8
9
0
1 time (slow)
1 time (slow)
1 time (slow)
4 times
4 times
4 times (default)
10 times (fast)
10 times (fast)
10 times (fast)
None
P/M
*) When digit 0 (tone ringer off) has been programmed,
the device will automatically return to the previous
setting (different from 0) by next off-hook.
13
July 1998
Rev. 7
Data Sheet
AS2533...6
Temporary MF
MODE pin connected
to row 1, 2, 3, 4 or 5
When MODE pin = row 5, pressing the * key
also transmits the tone by MF select.
The T/P key (not AS2535) can be used
alternatively to
RAM
the * key.
FIFO
T/P
T/P
Pressing any other
key does not
change the state.
*
D
FIFO
R
R
FIFO
T/P
*
EXIT FIFO
14
July 1998
Rev. 7
Data Sheet
AS2533...6
Storing Numbers (not AS2534)
Key entries different to the procedure will be ignored.
Exit programme mode from each state with on-hook
or with the P/M key.
P/M
Programme State
Speech circuit muted
LED flashing
Any invalid key
entry will abort
programme
state
M1-12
#
MR
Programming
Tone Ringer
Melodies
0 - 9
Entries (0-9, *, #, PS or LNR, R1, R2,
R3) will be written directly into the
selected memory location
P/M
15
July 1998
Rev. 7
Data Sheet
AS2533...6
Automatic Dialling
MR
M1-12
LNR
0 - 9
or
Postdialled digits are not stored
but buffered in FIFO
16
July 1998
Rev. 7
Data Sheet
AS2533...6
Timing Diagrammes
LD Dialling
MUTE
MASK
HS/DPN
tIDP
tB
tB
tIDP
tB
tPDP
tM
tM
tPDP
tM
LD Dialling With Access Pause
MUTE
MASK
HS/DPN
tIDP
tB
tB
tAP
tIDP
tB
tPDP
tM
tM
tPDP
tM
MF Dialling
MUTE
MASK
HS/DPN
TONE
tTD
tITP
tTD
tITP
tAP
tTD
tITP
Continues....
Rev. 7
17
July 1998
Data Sheet
AS2533...6
Flash
MUTE
MASK
HS/DPN
tM
tFD
tM
tPFP
tM
tFD
tM
Repeat Dialling (not AS2535)
Number
engaged
New
connection
RP key
MUTE
DIALLING
HS/DPN
Power
Down
tRP
tAP
18
July 1998
Rev. 7
Data Sheet
AS2533...6
Electrical Characteristics
Absolute Maximum Ratings
Positive Supply Voltage.................................................................................................................. -0.3V ≤ VDD ≤ 7V
Input Current ............................................................................................................................................... ± 25 mA
Input Voltage (LS) ......................................................................................................................... -0.3V ≤ VIN ≤ 10V
Input Voltage (LI, CS) ...................................................................................................................... -0.3V ≤ VIN ≤ 8V
Input Voltage (STB, RI) ......................................................................................................... -2V ≤ VIN ≤ VDD + 0.3V
Input Voltage (MO) ...................................................................................................................... -0.3V ≤ VIN ≤ +35V
Digital Input Voltage ............................................................................................................-0.3V ≤ VIN ≤ VDD + 0.3V
Electrostatic Discharge................................................................................................................................ ± 1000V
Storage Temperature ..................................................................................................................... -65°C to +125°C
Recommended Operating Conditions
Supply Voltage * (Speech Mode) ....................................................................................................... 4V ≤ VDD ≤ 5V
Oscillator Frequency (Resonator: Murata CSA 3.58M G312AM) ..............................................................3.58 MHz
Operating Temperature ................................................................................................................... - 25°C to +70°C
* This voltage is generated internally
DC Characteristics (ILINE = 15 mA unless otherwise specified)
Symbol
Parameter
Conditions
Min
Typ
3
Max
Units
mA
mA
µA
IDD
Operating Current
Speech mode
5
MF dialling
4
LD dialling, VDD = 2.5V
Ring mode, VDD = 2.5V
Idle mode, VDD = 2V
TAMB = 25°C
200
300
0.05
µA
IDD0
Retention Current
µA
VLI
IOL
Line Voltage (default)
Output Current, Sink
CS, HS/DP, MO
13 mA ≤ ILINE ≤100 mA
VOL = 0.4V
4.5
1.5
V
mA
IOL
VIL
Output Current, Sink; LED VOL = 0.4V
4
mA
V
Input Low Voltage
HS/DPN; FCI
TAMB = 25°C
HS/DPN; FCI
TAMB = 25°C
VSS
0.3 VDD
VDD
VIH
Input High Voltage
0.7 VDD
V
19
July 1998
Rev. 7
Data Sheet
AS2533...6
AC Characteristics (ILINE = 15 mA; f = 800 Hz unless otherwise specified)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Tx
Transmit
Test Circuit Fig. 10
M1/M2 to LI
ATX
Gain, Transmit
35.1
36.6
±0.8
38.1
2
dB
dB
∆ATX/F
THD
VAGC
ASCO
tATTACK
tDECAY
ZIN
Variation with Frequency
Distortion
f = 500 Hz to 3.4 kHz
VLI ≤ 0.25VRMS
VLI =
%
Soft Clip Level
2
VPEAK
dB
Soft Clip Overdrive
Attack Time
20
30
20
20
µs/6 dB
ms/6dB
kΩ
Decay Time
Input Impedance (M1/M2)
Mute Attenuation
Noise Output Voltage
Input Voltage Range
(M1/M2)
AMUTE
VNO
Mute activated
TAMB = 25°C
60
dB
-72
dBmp
VPEAK
VPEAK
VIN Max
Differential
±1
Single Ended
±0.5
BJT
VIN MAX
VTX
Output Driver
Input Voltage Range (LI)
Dynamic Range
Return Loss
±2
±2
VPEAK
VPEAK
dB
RL
ZRL=1000Ω; TAMB = 25°C
18
∆ZAC/TEMP
Rx
Temperature Variation
Receive
0.5
Ω/°C
Test Circuit Fig. 10
ARX
Receive Gain (Vol. default) LI to RO
1.5
3
4.5
dB
dBr
AVOL
AVOL
∆ARX/F
THD
VAGC
ASCO
tATTACT
tDECAY
VNO
Volume Gain
VOL key
+5.4
Volume Gain
–/+ keys
-5.4/+8.1
±0.8
dBr
Variation with Frequency
Distortion
f = 500 Hz to 3.4 kHz
VRI ≤ 0.25VRMS
dB
2
%
Soft Clip Level
Soft Clip Overdrive
Attact Time
VRO
=
1
VPEAK
dB
10
30
20
VRI > 0.8VRMS
µs/6 dB
ms/6dB
dBmp
dBm
kΩ
Decay Time
Noise Output Voltage
TAMB = 25°C
-72
-60
VUFC
ZIN
Unwanted F. Components 50 Hz....20 kHz
Input Impedance (RI)
8
VIN RI
AST
Input Voltage Range (RI)
±2
VPEAK
dB
Sidetone Cancellation
Input Voltage Range (STB)
Input Impedance (STB)
VRI ≤ 0.25VRMS
26
VIN ST
ZIN
±2
80
VPEAK
kΩ
20
July 1998
Rev. 7
Data Sheet
AS2533...6
AC Characteristics (cont´d) (ILINE = 15 mA; f = 800 Hz unless otherwise specified)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Keyboard
tD
Key Debounce Time
HS/DPN Input
Low to High Debounce
High to Low Debounce
15
ms
tHS-L
tHS-H
Going off-hook
Not LD dialling
During LD dialling
15
ms
ms
ms
210
270
DTMF
F
Frequency deviation
Note 5
1.2
- 5.5
- 17.5
3.0
-40
-50
-70
-80
85
%
dB
VMF
MF Tone Level (Low group) MFL = AGND
MFL = VSS
- 2.5
- 14.5
1.8
- 4
- 16
2.4
dB
∆VL-H
Preemphasis Low to High
dB
VUFC
Unwanted F. Componets
Note 3; MFL = VSS
300 Hz...5 kHz
dBm
dBm
dBm
dBm
ms
5 kHz...14 kHz
14 kHz...28.5 kHz
28.5 kHz...40 kHz
Note 1&6; Mode=row 6 or 7
Note1; Mode=row 6
Note 1 & 6; Mode=row 7
Note 2
tTD
tITP
tITP
tTR
tTF
Tone Duration
Inter Tone Pause
Inter Tone Pause
Tone Rise Time
Tone Fall Time
LD
80
80
82.3
82.3
165
85
ms
150
170
5
ms
ms
Note 2
5
ms
tDR
Dial Rate
Mode = row 1, 2 or 5
Mode = row 3 or 4
Mode = row 2
9.53
19.05
57
10
20
10.5
21
pps
pps
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
ms
t/B
Break Period
61.2
30.6
66
63
t/B
Break Period
Mode = row 4
28.5
63
31.5
69
t/B
Break Period
Mode = row 1 or 5
Mode = row 3
t/B
Break Period
31.5
38
33
34.5
42
tM/
Make Period
Mode = row 2
40.8
20.4
33
tM/
Make Period
Mode = row 4
19
21
tM/
Make Period
Mode = row 1 or 5
Mode = row 3
31.5
15.7
34.5
17.3
tM/
Make Period
16.5
35
tPDP
tIDP
tHS-H
tMO
Pre-Digit Pause
Inter Digit Pause
High to Low Debounce
Mute Overhang
Mode = row 1, 2, 3, 4 or 5
During LD dialling
800
840
270
tM
880
21
July 1998
Rev. 7
Data Sheet
AS2533...6
Symbol
Parameter
Conditions
Min
100
270
600
312
Typ
Max
Units
ms
tFD
Flash Duration 1
Flash Duration 2
Flash Duration 3
R1 key
102
300
650
450
R2 key
ms
R3 key (AS2533/4B/5/6)
R3 key (AS2534E only)
ms
375
274
2.05
1.6
ms
tPFP
tAP
Post Flash Pause
Access Pause
ms
Note 8
2.0
2.12
sec
sec
tRP
Repeat Break Time
Tone Ringer
Melody Output
Melody Delay
VMO
tMD
F1
F2
F3
tDT
PDM
10
ms
Hz
Hz
Hz
s
Frequency 1
800
1067
Frequency 2
Frequency 3
1333
Detection Time
Detection Time-out
Min. Detection Frequency
Max. Detection Frequency
Pacifier Tone
Frequency
Initial
1/f + 73ms
note 4
13
tTO
ms
Hz
Hz
fMIN
fMAX
70
Programme Mode Only
P/M mode, key entry
Key entry
fPT
1477
60
Hz
mV
ms
ms
ms
VRT
Level (RO)
tRTD-E
tRTD-A
tRTD-R
Duration, Key Entry
Duration, Acknowledge
Duration, Reject
LED Output
Valid key entry, prog.
Terminate with P/M key
Invalid key entry, note 7
40
140
4x40
tLED-ON
"on-time"
P/M state
P/M state
80
1
ms
tLED-OFF
Interval
sec
Comfort Tone (DTMF)
Level (RO)
VCT
Relative to LS
-30
dBr
Note 1: The values are valid during automatic dialling and are minimum values during manual dialling, i.e. the tones will
continue as long as the key is depressed.
Note 2: The rise time is the time from 10% of final value till the tone amplitude has reached 90 % of its final value.
Note 3: Relative to high group.
Note 4: The FCI circuit is reset by POR and HS/DPN pulled high (off-hook). After a reset the FCI circuit is in a standby state. A
positive edge on FCI will start a 73 ms timer and the frequency discrimination is initiated. Whenever a period of the ring
signal is missing, the timer is reset. When a valid ring signal is present for 73 ms, the melody generator is started and is
directly controlled by the ring signal. This condition will remain until a new reset.
Note 5: This does not include the frequency deviation of the ceramic resonator.
Note 6: During temporary MF mode.
Note 7: An invalid key entry in programme mode will invoke a tone sequence with 4 tone bursts of 40 ms and pauses between
bursts of 28 ms and abort the programme mode.
Note 8: Pauses inserted within the first 5 entries of a digit string will be automatically terminated after 2 seconds. Pauses
inserted after location 5 can only be terminated manually by pressing the PS or LNR key.
22
July 1998
Rev. 7
Data Sheet
AS2533...6
Test Circuit
AS253x
Figure 10
23
July 1998
Rev. 7
Data Sheet
AS2533...6
Characteristic Curves (Typical)
Fig. 11 Receive Soft Clipping and Distortion
Fig. 12 Transmit Soft Clipping and Distortion
12
2,5
10
(%)
9
1,2
soft clipping
(Vp)
(%)
soft clipping
(Vp)
2,0
VRO
10
9
8
7
6
5
4
3
2
1
0
1,0
VLS
8
7
6
5
4
3
2
1
0
Line Current: 20 mA
0,8
Frequency: 800 Hz
Tamb: 25°C
Line Current: 20 mA
Frequency
1,5
1,0
0,5
0,0
Typically
Tamb: 25°C
Typically
0,6
0,4
THD
THD
0,2
0,0
0,00 0,25 0,50 0,75 1,00 1,25 1,50 1,75 2,00
Line Input Voltage (LS)
(Vp)
(mVp)
150
0
25
50
75
100
125
Microphone Input Voltage (M1/M2)
Fig. 13 DC Mask
(V)
7
VLS
6
VLI
5
4
Typically
No ac signals
Tamb: 25°C
3
2
1
0
(mA)
100
0
10
20
30
40 Line Current 60
70
80
90
24
July 1998
Rev. 7
Data Sheet
AS2533...6
28 Pin DIP (suffix P)
Pin Configuration
28 Pin SOIC (suffix T)
1
28
RI
LI
VSS
LS
MFL
RO
LS
1
2
27
26
25
24
23
22
21
20
19
18
17
16
15
28
27
26
25
24
23
22
21
20
19
18
17
16
15
RI
LI
MFL
RO
2
3
3
V
SS
4
VDD
CS
M2
M1
LED
FCI
R1
R2
R3
R4
C1
C2
VDD
4
CS
M2
M1
LED
FCI
5
AGND
STB
CI
MO
LLC
A
GND
5
6
STB
CI
6
7
7
8
MO
LLC
8
9
9
R1
R2
10
11
12
13
14
HS/DP
OSC
MODE
C4
HS/DP
OSC
MODE
C4
10
11
12
13
14
R3
R4
C1
C2
C3
C3
Ordering Information
Device
Package
Memories
Volume
Centrex
Special keys
AS2533 T 28 pin SOIC
AS2533 P 28 pin DIP
AS2534B T 28 pin SOIC
AS2534B P 28 pin DIP
AS2534E P 28 pin DIP
AS2534E T 28 pin SOIC
AS2535 T 28 pin SOIC
AS2535 P 28 pin DIP
AS2536 T 28 pin SOIC
AS2536 P 28 pin DIP
4 direct/10 indirect
4 direct/10 indirect
none
none
none
none
12 direct
12 direct
4 direct/10 indirect
4 direct/10 indirect
yes, note 1 A B C D
yes, note 1 A B C D
yes, note 2 A B C D
yes, note 2 A B C D
yes, note 2 A B C D
yes, note 2 A B C D
yes, note 1 no
yes, note 1 no
yes, note 2 A B C D
yes, note 2 A B C D
P/M, LNR, R1-3, MR, RP, PS, T/P
P/M, LNR, R1-3, MR, RP, PS, T/P
P/M, LNR, R1-3, RP, PS, T/P
P/M, LNR, R1-3, RP, PS, T/P
MT, LNR, R1-3, RP, PS, T/P
MT, LNR, R1-3, RP, PS, T/P
P/M, LNR, R1-3
P/M, LNR, R1-3
P/M, LNR, R1-3, MR, RP, PS, T/P
P/M, LNR, R1-3, MR, RP, PS, T/P
Conditions for delivery as dice see also data sheet AS2533/4B/5/6-CX.
Note 1: volume is reset to default by on-/off-hook and by POR
Note 2: volume is reset by POR only.
Application:
For application support contact your local sales offices.
Devices sold by Austria Mikro Systeme/Thesys are covered by the warranty and patent idemnification provisions appearing in its Term of Sale. Austria Mikro Systeme/Thesys makes no warranty,
express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the decribed devices from patent infringement. Austria Mikro Systeme reserves
the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with Austria Mikro Systeme for current
information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability
applications, such as military, medical life-support or life-sustaining equiment are specifically not recommended without additional processing by Austria Mikro Systeme/Thesys for each application.
Copyright © 1995-8, Austria Mikro Systeme International AG, Schloss Premstätten, 8141 Unterpremstätten, Austria. Trademarks Registered ®. All rights reserved. The material herein may not be
reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner.
The information furnished here by Austria Mikro Systeme/Thesys is believed to be correct and accurate. However, Austria Mikro Systeme/Thesys shall not be liable to recipient or any third party
for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any
kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of Austria Mikro
Systeme/Thesys‘ rendering of technical or other services.
25
July 1998
Rev. 7
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