ams AS2533W Rx and tx soft clipping to avoid harsh distortion Datasheet

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austriamicrosystems
Multi-Standard CMOS Telephone IC
for Basic Telephones
AS2533-36
DATA SHEET
-
The AS253x is a CMOS integrated circuit that contains all
the functions needed to build a high performance electronic
telephone set with basic features.
-
-
-
Dialler
-
The versatility of the circuit is provided by pin options and a
few external components. This allows fast time-to-market
and easy adaptation to different PTT requirements. A
unique EMI performance has been achieved due to the
consequent use of CMOS amplifiers.
-
Ringer
-
Key Features
-
Line Interface and Speech Circuit
-
LD/MF dialing and mixed-mode dialing
31 digit last number redial (LNR)
4 direct/10 indirect (AS2533/36), 12 direct (AS2535)
Repeat dialing by busy or engaged (not AS2535)
Confidence tone during memory programming and mute
Notepad memory function
Pause key for access pause or wait function
3 flash timings, 100 ms, 280 ms and 375/600 ms
Sliding cursor protocol with comparison
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The device is available in 4 versions (pin-compatible) with
different features ranging from LNR only (last number
redial) to 4 direct (one-touch) memories and 10 indirect
(two-touch) memories. The sliding cursor procedure makes
the LNR function easy to use under various PABX systems.
-
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The AS253x incorporates a line interface, a speech circuit,
a dialler and ringer. It is a real single-chip / single-die IC
with 28 pins. It allows either package mounting or chip-onboard mounting.
-
Rx and Tx soft clipping to avoid harsh distortion
Real or complex impedance (EU compliant)
Stabilized supply for dialler and peripherals
Automatic line loss compensation
Operating range from 13 to 100 mA (down to 5 mA with
reduced performance)
Unique EMI performance (EU compliant)
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General Description
Electronic Rx volume control
Electronic microphone mute
Microphone amplifier with symmetrical input
-
Ring frequency discrimination
3-tone melody generator
Ring melody selection via keyboard
Ring volume selection via keyboard
Version available with fixed ring melody and ring volume
Package
-
SOIC 28 or DIE
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Block Diagram
Figure 1 Block Diagram
Revision 8.10
Page 1 of 25
austriamicrosystems
Data Sheet AS2533-36
Pin Description
Symbol
Function
4
V DD
Positive Voltage Supply
This is the supply pin for the circuit.
5
A GND
A nalog G round
This is the analogue ground for the amplifiers.
6
STB
S ide T one B alance Input
This is the input for side tone cancellation.
7
CI
8
MO
C omplex Impedance Pin
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For complex impedance a capacitor should be connected to
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Pin #
M elody O utput
9
LLC
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PDM output of the melody generator for tone ringing with internal open-drain transistor.
Hi-Z when not active.
L ine L oss C ompensation
Select pin for line loss compensation (see also Figure 6 and Figure 7).
LLC = A GND : 20 - 50 mA LLC = V DD : 45 - 75 mA LLC = V SS : none.
10
HS/DP
H ook Switch Input and D ial P ulse 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 dialing and flash.
11
OSC
OSC illator Input
Pin for ceramic resonator (3.58 MHz).
Reference: Murata CSTCC3M58GD3346-R0
Murata CSTLS3M58GD3458-B0
MODE
Signaling
MODE Select Input
Mode pin
Function
Open
Dialing inhibited
Row 1
LD mode, 10 pps, 33/66 ms
Row 2
LD mode, 10 pps, 40/60 ms
Row 3
LD mode, 20 pps, 33/66 ms
Row 4
LD mode, 20 pps, 40/60 ms
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12
SMD
Lead
13
14
15
16
Revision 8.10
C4
C3
C2
C1
Row 5
LD mode, 10 pps, 33/66 ms, Temp. MF with tone on first * key entry
Row 61
MF only, 82/82 ms
Row 7
MF only, 82/160 ms
During temporary MF: 82/160 ms
Keyboard Columns
(see key arrangements in Figure 2, Figure 3 and Figure 4)
Page 2 of 25
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Data Sheet AS2533-36
Pin #
Symbol
17
18
19
20
R4
R3
R2
R1
21
FCI
Function
Keyboard Rows
(see key arrangements in Figure 2, Figure 3 and Figure 4)
F requency C omparator I nput
22
LED
LED Output Driver
Output for driving an LED that will be flashing when in Program/Mute state.
M1
M2
25
CS
Microphone Inputs
Differential inputs for the microphone (electret).
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23
24
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This is a Schmitt trigger input for ring frequency discrimination. Disabled during off-hook.
C urrent S hunt Control Output
26
V SS
27
LI
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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 dialing.
Negative Power Supply
L ine I nput
This input is used for power extraction and line current sensing.
28
RI
R eceive I nput
This is the input for the receive signal.
1
LS
L ine Current S ense Input
This is the input for sensing the line current.
2
MFL
MF L evel Setting
A voltage divider connected from this pin to A GND and V SS can be used to set the DTMF level.
3
RO
R eceive O utput
This is the output for driving a dynamic earpiece with an impedance of 150 to 300 Ω.
Selection Overview
AS2533
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Function
AS2535
AS2536
0
12
4
0
0
10
yes
no
yes
yes
yes
yes
yes
yes
yes
yes
no
yes
P/M
P/M
P/M
yes
no
yes
yes
yes
yes
yes
no
yes
yes
yes
yes
no
yes
no
AS2534:yes
yes
yes
yes
AS2534R: no
R3 Flash duration
600 ms
600 ms
600 ms
600 ms
The corresponding product (AS2533-36) can be selected via bond-options (see chapter “Bond options” for details).
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Direct memories (one-key)
Indirect memories (two-key)
Repeat dialing
LNR key
Pause insertion by LNR key
Pause (PS) key
P/M or MT key
Tone/Pulse (T/P) key
Temporary MF by * key
Centrex (A - D) keys
Volume (VOL, –/+) keys
Volume reset by off-hook
Programming of tone ringer
AS2534/34R
Revision 8.10
4
10
yes
yes
yes
yes
P/M
yes
yes
yes
yes
yes
Page 3 of 25
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Data Sheet AS2533-36
Functional Description
(Either VOL or +/– keys)
Keyboard Connections
Key closure, R ON max. = 1 kΩ
C3
C4
R1
PP // M
M
11
22
33
R2
44
55
66
77
R3
88
99
00
**
R4
##
RR 11
RR 22
RR 33
LLNNRR
VVOOLL
++
−−
AA
BB
CC
DD
RRPP
PPSS
TT // PP
M
M 11
M
M 22
M
M 33
M
M 44
M
M RR
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C2
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C1
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Key open, R OF F min. = 1 MΩ
C2
C3
C4
PP // M
M
11
22
33
44
55
66
77
88
99
00
**
##
RR 11
RR 22
RR 33
LLNNRR
VVOOLL
++
−−
AA
BB
CC
DD
RRPP
PPSS
TT // PP
R1
R2
R3
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Figure 2 Keyboard Connection AS2533/36
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Figure 3 Keyboard Connection AS2534
Revision 8.10
Page 4 of 25
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Data Sheet AS2533-36
C3
C4
R1
PP // M
M
11
22
33
R2
44
55
66
77
R3
88
99
00
**
R4
##
RR 11
RR 22
RR 33
LLNNRR
VVOOLL
++
−−
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C2
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C1
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(either VOL or +/– keys)
Keyboard Connections continued
M
M 11
M
M 22
M
M 33
M
M 44
M
M 55
M
M 66
M
M 77
M
M 88
M
M 99
M
M 1100
M
M 1111
M
M 1122
Figure 4 Keyboard Connection AS2535
The on chip power on reset circuit monitors the supply
voltage (V DD ) during off-hook. When V DD rises above
approx. 1.2V, a power on reset occurs which clears the
RAM.
During pulse dialing the speech circuit and other part of
the device not operating is in a power down mode to save
current. The CS pin is pulled to V SS in order to turn the
external shunt transistor on to keep a low voltage drop at
the LS pin during make periods.
DC Conditions
AC Impedance
Power On Reset
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The normal operating range is from 13 mA to 100 mA.
Operating range with reduced performance is from 5 mA to
13 mA (parallel operation). In the operating range all
functions are operational.
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At line currents below 13 mA the AS253x provides an
additional slope below 4.5V in order to allow parallel
operation (see Figure 12).
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The dc characteristic (excluding diode bridge) is
determined by the voltage at LI and the resistor R1 at line
currents above 13 mA as follows:
ZAC = 33 — Z1
The dc value of Z1 should be 30 Ω to maintain correct dc
performance.
Return loss and side tone cancellation can be determined
independent of each other.
Speech Circuit
VLS = VLI + ILINE × R1
The voltage at LI is 4.5V in the normal operating range.
Revision 8.10
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:
The speech circuit consists of a transmit and a receive
path with dual soft clipping, mute, line loss compensation
and sidetone cancellation.
Page 5 of 25
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Data Sheet AS2533-36
The gain of the transmit path is 37 dB for 600 Ω line
termination from M1/M2 to LS (see test circuit Figure 9).
The microphone input is differential with an input
impedance of 20 kΩ.
Line Loss Compensation
The line loss compensation is a pin option. When it is
activated, the transmit and receive gains are decreased by
6 dB at line currents from 20 to 50 mA when LLC = A GND
and 45 to 75 mA when LLC = high (@ R1 = 30 Ω). The line
loss compensation is disabled when LLC = low (see Figure
6 and Figure 7).
The soft clip circuit limits the output voltage at LI to 2V PEAK
Receive
Valid Keys
The key scanning is enabled when HS/DPN is pulled high
and V DD is above V REF . A valid key is detected from the
keyboard by connecting the appropriate row to the column
(R ON < 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 microcontroller to the rows and
columns (see application note AN3010).
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The gain of the receive path is 3 dB for 600 Ω line
termination (test circuit Figure 9). The receive input the
differential signal of RI and STB. When mute is active
during dialing the gain is reduced by > 60 dB. During
DTMF dialing a MF comfort tone is applied to the receiver.
The comfort tone is the DTMF signal with level that is -30
dB relative to the line signal.
Dialing Functions
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(see Figure 11). The attack time is 30 µs/6 dB and the
decay time is 20 ms/6 dB. When mute is active, during
dialing or after pressing the P/M key, the gain reduced by >
60 dB.
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Transmit
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 AS2533/35 the volume is reset to default by next
off-hook and on AS2534/36 the volume setting will remain
at last setting. A POR will always reset the volume to
default.
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The soft clip circuit limits the voltage at the receive output
(RO) to 1V PEAK (see Figure 10). It prevents harsh
distortion and acoustic shock.
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Sidetone
A good sidetone cancellation is achieved by using the
following equation:
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Z Line Z 2
=
Z BAL Z1
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The sidetone cancellation signal is applied to the STB
input.
Z1
Z LI
ZB A
Z2
P/M and MT Key
The P/M key is used to enter the Program/Mute state.
Depressing the P/M key mutes the speech circuit and the
device is in program state. Repressing the P/M key
deactivates the mute and program state (toggle
function).The MT key works in similar way, but has no
program function.
When program/mute is activated, the LED indication is
turned on (flashing: 80 ms 'on' and 1 sec 'off').
Dial Mode Selection
The default mode (LD or MF) can be selected by the mode
pin. When default LD mode is selected, a temporary
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.
When MF mode is selected by the mode pin, the circuit can
not be changed temporary to LD but will remain in MF
mode.
Centrex Keys (not AS2535)
The alphanumeric keys accommodate easy use of centrex
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.
The centrex keys are not stored in the RAM, and
subsequently entered digits are buffered in FIFO.
Figure 5 Side Tone Balance
Revision 8.10
Page 6 of 25
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Data Sheet AS2533-36
A manually entered number is automatically stored in the
LNR RAM. The capacity of the RAM is 31 digits. If a
number greater than 31 digits is entered, the LNR facility
will be inhibited (until new entries < 32 digits) and further
entries will be buffered in FIFO.
Storable numbers
AS2533/36 AS2534
AS2535
14
0
12
Direct memory keys
4
0
12
Indirect memories
10
0
0
In the on chip RAM, numbers can be stored. Each number
can contain up to 21 digits (including pauses).
During programming multiple pauses can be inserted by
pressing the PS (not AS2535) or the LNR key. Each pause
inserted within the first 5 entries will automatically be
terminated after 2 seconds whereas pauses inserted after
location 5 in a digit string will halt dialing and can be
terminated manually by pressing the PS (not AS2535) or
the LNR key. The halt function allows in-dialing to an
extension on a PABX.
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Pauses can be inserted by pressing the PS key (not
AS2535).
Memory arrangement
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The current content of the RAM is overwritten by new
entries.
Memory Keys (not AS2534)
The keys M1 to M12 are direct memory access keys and
the MR key (AS2533/36 only) is used for abbreviated
dialing.
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Last Number Redial
LNR is a facility that allows resignalling of the last
manually dialed number without keying in all the digits
again. The LNR is repeatable after each off-hook.
Post dialed digits, i.e. digits manually entered after LNR
has been invoked, are not stored in RAM but buffered in
FIFO.
Repeat Dialing (not AS2535)
The last manually dialed 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.
The repeat function is enabled when prior to pressing the
RP key, a number has been dialed, and it can be invoked
an unlimited number of times until next on-hook. During the
1.6 second break the device is in power down mode to
save current.
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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.
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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.
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If the recall key is depressed after a digit string has been
entered or dialed out, the recall will not be stored but
buffered in the FIFO together with subsequently entered
digit.
If pressing the recall key is not followed by digit entries,
the LNR RAM remains intact.
After a recall a 270 ms pause will automatically be
Revision 8.10
Example (45678–123 is stored in M1, where – is a
pause/wait and 123 the extension number):
off-hook, wait for dial tone
press M1 (45678 is dialed out)
await dial tone from called PABX
press PS or LNR (123 is dialed out)
Memory dialing is cascadable. However, the content of one
memory must be dialed out before a new can be invoked.
Sliding Cursor Procedure
To accommodate easy and uncomplicated redialing (LNR)
behind a PABX, a sliding cursor protocol is implemented. If
new entries match the previous RAM contents, pressing
the LNR key will dial out the remaining digits.
If there is an error in matching, the LNR will be inhibited
until next on-hook, and the RAM will contain the new
number.
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 dialed out).
Tone Generator
The tone generator incorporates the DTMF tones, 3 basic
frequencies for the tone ringer and pacifier tones.
DTMF
The DTMF generator provides 8 frequencies, namely:
Page 7 of 25
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Data Sheet AS2533-36
Hz
Hz
Hz
Hz
1209
1336
1477
1633
The procedure is ended by repressing the P/M key.
Hz
Hz
Hz
Hz (not AS2535)
The MF output level can be set with an external voltage
divider on pin MFL.
Voltage at pin MFL (2)
DTMF Level
(Low Grp.)
typ. 1.50* V
-4.0 dBm
0.878 * A GND
1.317 V
-5.2 dBm
0.791 * A GND
1.187 V
-6.4 dBm
0.705 * A GND
1.058 V
-7.6 dBm
0.620 * A GND
0.930 V
-8.8 dBm
0.495 * A GND
0.743 V
-10.0 dBm
0.372 * A GND
0.558 V
-11.2 dBm
0.290 * A GND
0.435 V
-12.4 dBm
0.210 * A GND
0.315 V
-13.6 dBm
0.130 * A GND
0.195 V
-14.8 dBm
V SS
0.000 V (V SS )
-16.0 dBm
(Z LINE = 600)
*typical MFL values for A GND = 1.5V
The preemphasis is 2.6 dB.
The MF tones are according to CEPT recommendations.
Tone Ringer (Melody/Volume)
The three basic frequencies of the melodies are:
F1 = 800 Hz, F2 = 1067 Hz, and F3 = 1333 Hz (± 5%).
2
Volume
1 time (50 ms pause)
- 16 dB
1 time (50 ms pause)
- 7 dB
1 time (50 ms pause)
0 dB (max.)
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3
Repetition Rate
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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:
Digit
4 times
- 16 dB
5
4 times
- 7 dB
6
4 times (default, AS2534R)
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4
0 dB (max.)
7
10 times
8
10 times
- 7 dB
9
10 times
0 dB (max.)
0
None
Revision 8.10
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:
Sequence F1 F2 F3 F1 F2 F3 …
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A GND
The default setting is digit 6, i.e. after a power on reset the
device will start up with repetition rate 4 and maximum
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.
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Low group
Digit 1-2-3-A
Digit 4-5-6-B
Digit 7-8-9-C
Digit * -0-# -D
High group
Digit 1-4-7- *
Digit 2-5-8-0
Digit 3-6-9-#
Digit A-B-C-D
- 16 dB
Pacifier Tone
By MF dialing 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 program mode.
When terminating the program 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 program
mode indicated by a rejection tone of 4 times 40 ms with
28 ms pauses between the tone bursts.
Ring Frequency Discrimination
The ring frequency discriminator assures that only signals
with a frequency between 13Hz and 70 Hz are regarded as
valid ring signals. The time for recognizing a valid ring
signal is 1/f seconds, where 'f' is the ring frequency.
When a valid ring signal is present for 73 ms continuously,
the melody generator is activated and remains active as
long as the ring signal is present.
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 invalid ring signal respectively (until
next POR or off-hook).
Off
Page 8 of 25
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Data Sheet AS2533-36
Typical Characteristics of
Line Loss Compensation
LLC = AG ND
LLC = V DD
LLC = V SS
f = 800 Hz
Z LINE = 600Ω
Ω
V LS = -10 dBm
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35
34
33
32
31
30
29
Tx Gain
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(dB)
DC Line
Current
30
40
50
60
70
80
(mA)
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Figure 6 Typical Tx Gain Characteristics Line Loss Compensation
(dB)
+4
+3
+2
+1
0
-1
-2
Rx Gain
LLC = V DD
LLC = AG ND
LLC = V SS
f = 800 Hz
Z LINE = 600Ω
Ω
V LS = -10 dBm
VOL = 0 dB (neutral)
20
30
DC Line
Current
40
50
60
70
80
(mA)
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Figure 7 Typical Rx Gain Characteristics Line Loss Compensation
Revision 8.10
Page 9 of 25
austriamicrosystems
Data Sheet AS2533-36
Typical Application
Complex Impedance
(270 W + 750 W // 150 nF)
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Only the components
necessary for
presenting the
complete functions of
the AS253x are
included.
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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 austriamicrosystems AG will
not have tested the product to
meet specific standards.
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For further application
information please refer to
application note AN2201
.
Figure 8 Typical Application
Revision 8.10
Page 10 of 25
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Data Sheet AS2533-36
Programming Procedures
When Code 0 (tone ringer off) has been programmed, the
device will automatically return to previous setting
(different from 0) by next off-hook.
Procedure Principles
Temporary MF
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The procedure below assumes that the device is operated
in puls mode.
1.
Go off-hook
2.
Press [*] or [T/P] to switch to DTMF mode
3.
Press [R] or [T/P] to switch back to PULS mode
4.
Got to 2. to switch again to DTMF mode
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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 critical errors, e.g.
dialing wrong numbers, deleting stored numbers, etc.
- be consistent, simple and usable.
Mode pin is connected to row 1, 2, 3, 4, or 5. When mode
pin = row 5, pressing the [*] key also transmits the tone by
MF selected. The [T/P] key (not AS2535) can be used
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The following chapters describe the operating procedures
for the provided features. Pressing an invalid key or key
combination during programming will cause the device to
abort the program 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 / offhook which will generate a functional reset.
Storing Numbers (not AS2534)
Up to 14 numbers, each with maximum 21 digits, can be
stored into the internal RAM.
alternatively to the [*] key.
Automatic Dialing
The following procedure describes the dialing procedure
and the internal sequences:
1.
Go off-hook
2.
Enter the number by pressing digit, [M1]-[M12], [LNR]
or [MR] + digit
3.
The number is internally buffed in the FIFO
4.
Tone- or Puls-Dialing starts
1.
Press [P/M] to enter program mode
5.
Wait for connection
2.
Enter location (MR + digit 1; or M1 to M12)
6.
Got to 2 for entering postdialed digits
3.
Enter number - entries (0-9, *, #, PS or LNR, R1, R2,
location)
Postdialed digits are not stored but buffed in the FIFO.
ca
R3) will b written directly into the selected memory
Press [P/M] to store and exit or go on-hook to abort
5.
Go to 1 for storing further numbers
ni
4.
Programming Tone Ringer
ch
Three different ringer melodies with three levels each can
be programmed. AS2534R cannot be programmed.
Press [P/M] to enter program mode
2.
Press [#] for ringer programming mode
Te
1.
3.
Enter Code to select ringer melody and volume(see
code table in section Tone Ringer (Melody/Volume)
4.
1
Press [P/M] to store and exit or go on-hook to abort
Digit includes 0 – 9
Revision 8.10
Page 11 of 25
austriamicrosystems
Data Sheet AS2533-36
Timing Diagrams
LD Dialing
al
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MUTE
MASK
t IDP
tB
tB
tM
t IDP
tM
t PDP
tB
tM
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st
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t PDP
lv
HS/DPN
LD Dialing with Access Pause
MUTE
MASK
HS/DPN
MF Dialing
tB
tM
tB
t AP
tM
t IDP
t PDP
tB
tM
ni
MUTE
t PDP
ca
t IDP
ch
HS/DPN
Te
LS
Revision 8.10
t TD
t ITP
t TD
t ITP
t AP
t TD
t ITP
Page 12 of 25
austriamicrosystems
Data Sheet AS2533-36
Flash
MUTE
HS/DPN
t FD
t PFP
tM
tM
t FD
tM
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st
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lv
tM
al
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MASK
Repeat Dialing (not AS2535)
Number
engaged
RP key
MUTE
HS/DPN
ca
DIALLING
New
connection
t RP
t AP
Te
ch
ni
Power Down
Revision 8.10
Page 13 of 25
austriamicrosystems
Data Sheet AS2533-36
Electrical Characteristics
Absolute maximum ratings
Positive Supply Voltage
-0.3V < V DD < 7V
Input Current
± 25mA
-0.3V < V I N < 10V
al
id
Input Voltage (LS)
Input Voltage (LI, CS)
-0.3V < V I N < 8V
Input Voltage (STB, RI)
-2V < V I N < V DD +0.3V
-0.3V < V IN < +35V
lv
Input Voltage (MO)
Digital Input Voltage
-0.3V < V IN < V DD +0.3V
± 1000V
Electrostatic Discharge (HBM 1.5kΩ-100pF)
-65°C to +125°C
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Storage Temperature
Recommended operating conditions
Supply Voltage * (Speech Mode)
3.8V < V DD < 5V
Oscillator Frequency (Resonator: Murata CSA 3.58M G312AM)
Operating Temperature
3.58 MHz
-25°C to +70°C
* This voltage is generated internally
DC Characteristics (I LINE = 15 mA unless otherwise specified)
Parameter
Conditions
I DD
Operating Current
Min.
Typ.
Max.
Units
Speech mode
3
5
mA
MF dialing
4
mA
LD dialing, V DD = 2.5V
200
µA
Ring mode, V DD = 2.5V
300
µA
0.05
µA
ca
Symbol
I DD0
Retention Current
Idle mode, V DD = 2 V,
T AMB = 25°C
Line Voltage (default)
13 mA < I LINE < 100 mA
4.5
V
Output Current, Sink
CS, HS/DP, MO
V OL = 0.4V
1.5
mA
I OL
Output Current, Sink; LED
V OL = 0.4V
4
mA
V IL
Input Low Voltage
HS/DPN; FCI
Te
ch
I OL
ni
V LI
V IH
Revision 8.10
V SS
0.3 V DD
V
0.7 V DD
V DD
V
T AMB = 25°C
Input High Voltage
HS/DPN; FCI
T AMB = 25°C
Page 14 of 25
austriamicrosystems
Data Sheet AS2533-36
AC Characteristics (I LINE = 15 mA; f = 800 Hz unless otherwise specified)
Symbol
Parameter
Conditions
Min
Tx
Transmit
Test Circuit Figure 9
A TX
Gain, Transmit
M1/M2 to LI
∆A TX/F
Variation with Frequency
f = 500 Hz to 3.4 kHz
THD
Distortion
V LI < 0.25V RMS
V AGC
Soft Clip Level
2
A SCO
Soft Clip Overdrive
20
t A TTACK
Attack Time
30
t DE CAY
Decay Time
20
Z IN
Input Impedance (M1/M2)
20
A MUTE
Mute Attenuation
Mute activated
V NO
Noise Output Voltage
T AMB = 25°C
V IN Max
Input Voltage Range
Differential
(M1/M2)
Single Ended
35.1
Typ
Max
36.6
38.1
±0.8
Units
dB
dB
%
al
id
2
V PEAK
dB
µs/6 dB
ms/6dB
lv
kΩ
60
dB
am
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on A
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st
il
-72
dBmp
±1
V PEAK
±0.5
V PEAK
BJT
Output Driver
V IN MAX
Input Voltage Range (LI)
±2
V PEAK
V TX
Dynamic Range
±2
V PEAK
RL
Return Loss
∆Z AC/TEMP
Temperature Variation
Rx
Receive
Test Circuit Figure 9
A RX
Receive Gain (Vol. default)
LI to RO
A VOL
Volume Gain
VOL key
+5.4
dBr
A VOL
Volume Gain
–/+ keys
-5.4/+8.1
dBr
∆A RX/F
Variation with Frequency
f = 500 Hz to 3.4 kHz
±0.8
dB
THD
Distortion
V RI < 0.25V RMS
V AGC
Soft Clip Level
V RO =
Z RL =1000Ω; T AMB = 25°C
18
0.5
1.5
3
4.5
2
1
dB
Ω/°C
dB
%
V PEAK
Soft Clip Overdrive
t A TTACT
Attack Time
t DE CAY
Decay Time
V NO
Noise Output Voltage
T AMB = 25°C
-72
dBmp
Unwanted F. Components
50 Hz....20 kHz
-60
dBm
V RI > 0.8V RMS
Input Impedance (RI)
ch
Z IN
ni
V UFC
ca
A SCO
10
dB
30
µs/6 dB
20
ms/6dB
8
kΩ
±2
V PEAK
Input Voltage Range (RI)
A ST
Sidetone Cancellation
V IN ST
Input Voltage Range (STB)
±2
V PEAK
Input Impedance (STB)
80
kΩ
Te
V IN RI
Z IN
Revision 8.10
V RI < 0.25V RMS
26
dB
Page 15 of 25
austriamicrosystems
Data Sheet AS2533-36
AC Characteristics (cont´d) (I LINE = 15 mA; f = 800 Hz unless otherwise specified )
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Keyboard
Key Debounce Time
tD
15
ms
ms
t HS-L
Low to High Debounce
Going off-hook
15
t HS-H
High to Low Debounce
Not LD dialing
210
During LD dialing
270
DTMF
Frequency deviation
T AMB = 25°C, Note 5
V MF
MF Tone Level (Low group)
MFL = A GND , T AMB = 25°C
V MF
MF Tone Level (Low group)
MFL Range = V SS … A GND ,
T AMB = 25°C
∆V L-H
Preemphasis Low to High
T AMB = 25°C,
V UFC
Unwanted F. Components
Note 3; MFL = V SS
- 2.5
-4
ms
ms
1.2
%
- 5.5
dB
lv
F
al
id
HS/DPN Input
-16…-4
2.4
3.0
dB
300 Hz...5 kHz
- 40
dBm
5 kHz...14 kHz
- 50
dBm
14 kHz...28.5 kHz
- 70
dBm
28.5 kHz...40 kHz
- 80
dBm
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1.8
dB
tT D
Tone Duration
Note 1&6; Mode=row 6 or 7
80
82.3
85
ms
t IT P
Inter Tone Pause
Note1; Mode=row 6
80
82.3
85
ms
t IT P
Inter Tone Pause
Note 1 & 6; Mode=row 7
150
165
170
ms
tT R
Tone Rise Time
Note 2
5
ms
tT F
Tone Fall Time
Note 2
5
ms
LD
Dial Rate
t DR
Mode = row 1, 2 or 5
9.53
10
10.5
pps
Mode = row 3 or 4
19.05
20
21
pps
Break Period
Mode = row 2
57
61.2
63
ms
t /B
Break Period
Mode = row 4
28.5
30.6
31.5
ms
t /B
Break Period
Mode = row 1 or 5
63
66
69
ms
t /B
Break Period
Mode = row 3
31.5
33
34.5
ms
Make Period
Mode = row 2
38
40.8
42
ms
Make Period
Mode = row 4
19
20.4
21
ms
Make Period
Mode = row 1 or 5
31.5
33
34.5
ms
t M/
Make Period
Mode = row 3
15.7
16.5
17.3
ms
t PDP
Pre-Digit Pause
t M/
Te
ch
t M/
ni
t M/
ca
t /B
35
t IDP
Inter Digit Pause
Mode = row 1, 2, 3, 4 or 5
fosc = 3.58 MHz
t HS-H
High to Low Debounce
During LD dialing
t MO
Mute Overhang
Revision 8.10
780
790
270
ms
800
ms
ms
tM
Page 16 of 25
austriamicrosystems
Data Sheet AS2533-36
Symbol
Parameter
Conditions
Min
Max
Units
tF D
Flash Duration 1
R1 key
100
102
ms
Flash Duration 2
R2 key
270
300
ms
Flash Duration 3
R3 key (AS2533/34/35/36)
600
650
ms
Note 8
2.0
2.12
sec
Post Flash Pause
tA P
Access Pause
t RP
Repeat Break Time
274
2.05
1.6
Tone Ringer
t MD
Melody Delay
F1
Frequency 1
F2
Frequency 2
F3
Frequency 3
PDM
10
ms
lv
Melody Output
sec
800
Hz
1067
Hz
1333
Hz
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st
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V MO
ms
al
id
t P FP
Typ
1/f + 73ms
s
note 4
ms
Min. Detection Frequency
13
Hz
f MAX
Max. Detection Frequency
70
Hz
Pacifier Tone
Program Mode Only
fP T
Frequency
P/M mode, key entry
1477
Hz
V RT
Level (RO)
Key entry
60
mV
t RT D-E
Duration, Key Entry
Valid key entry, prog.
40
ms
t RT D-A
Duration, Acknowledge
Terminate with P/M key
140
ms
t RT D-R
Duration, Reject
Invalid key entry, note 7
4x40
ms
t LED-ON
"on-time"
P/M state
80
ms
t LED-OFF
Interval
P/M state
1
sec
V CT
Level (RO)
-30
dBr
t DT
Detection Time
tT O
Detection Time-out
f MIN
Initial
LED Output
Comfort Tone (DTMF)
ca
Relative to LS
Te
ch
ni
Note 1: The values are valid during automatic dialing and
are minimum values during manual dialing, 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.
Revision 8.10
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 program mode will invoke a
tone sequence with 4 tone bursts of 40 ms and
pauses between bursts of 28 ms and abort the
program 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.
Page 17 of 25
austriamicrosystems
Data Sheet AS2533-36
Figure 9 Test Circuit
Te
ch
ni
ca
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Test Circuit
Revision 8.10
Page 18 of 25
austriamicrosystems
Data Sheet AS2533-36
Characteristic Curves (Typical)
12
[Vp]
9
2,0
7
6
5
0,4
4
THD
3
0,2
2
10
9
[%]
soft clipping
VLS
8
7
Line Current: 20mA
Frequency: 800Hz
Tamb: 25°C
Typically
1,5
1,0
0,25
0,50
0,75
1,00
1,25
1,50
1,75
THD
0,5
2
0,0
0
50
75
100
7
0
150
125
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8
[mVp]
Figure 11 Transmit Soft Clipping and Distortion
VLS
6
DC Mask [V]
25
Microphone Input Voltage (M1/M2)
Figure 10 Receive Soft Clipping and Distortion
5
4
VLI
3
Typically
No AC signals
Tamb: 25°C
ca
2
ni
1
0
3
1
0
2,00
[Vp]
Line Input Voltage (LS)
5
4
1
0,0
0,00
6
Distortion
8
Line Current: 20mA
Frequency: 800Hz
Tamb: 25°C
Typically
0,6
10
Line Output Voltage (LS)
1,0
Distortion
Receive Output Voltage (RO)
VRO
0,8
2,5
11
[%]
al
id
soft clipping
lv
1,2
[Vp]
10
20
30
40
50
60
70
80
90
100
Line Current [mA]
Figure 12 DC Mask
Te
ch
0
Revision 8.10
Page 19 of 25
austriamicrosystems
Data Sheet AS2533-36
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Bond Pad Layout
Bond Options
Product Version
AS2533
AS2535
Connection
BOND_AS2535
BOND_AS2536
not bonded
not bonded
BOND_AS2535
BOND_AS2536
not bonded
bonded to MODE
BOND_AS2535
BOND_AS2536
bonded to MODE
not bonded
BOND_AS2535
BOND_AS2536
not bonded
bonded to MODE
ch
ni
AS2536
(1)
(1)
ca
AS2534/34R
Bond Pad
Te
For deliveries as packaged devices (SOIC28), LNR only is tested, direct and indirect memories are not tested!
Revision 8.10
Page 20 of 25
austriamicrosystems
Data Sheet AS2533-36
Sizes and Coordinates
X
[µm]
y
[µm]
3.190mm x 2.975mm
85µm x 85µm
Reference co-ordinate of DIE = DIE center
Reference co-ordinate of PAD = PAD center
Pad Name
Pin No
Pads on the Left
x
[µm]
y
[µm]
al
id
Die Size:
Bond Pad Size:
Bond Pad Co-ordinates:
Pad Name
Pin No
20
Pads on the Right
1052.25
VDD
4
1392.50
-1053.80
R1
-1413.50
796.25
AGND
5
1392.50
-663.00
FCI
-1413.50
586.25
STB
6
1392.50
-319.80
-1413.50
226.25
CI
7
1413.50
408.75
-1392.50
-107.75
MO
8
1413.50
683.75
-1392.50
-399.35
LLC
9
-1392.50
-974.20
HS/DP
10
22
M1
23
M2
24
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LED
-1285.00
OSC
-862.10
-1285.00
BOND_AS2535
-696.70
-1285.00
MODE
-432.50
-1285.00
BOND_AS2536
-215.10
-1285.00
C4
Pads on the Top
1227.50
1301.25
CS
25
1079.50
1301.25
VSS
26
969.50
1301.25
VSS
26
627.50
1301.25
LI
27
54.50
1301.25
RI
28
-90.50
1301.25
LS
1
13
-449.50
1301.25
MFL
2
-744.50
1301.25
RO
3
Pads on the Bottom
-1244.00
21
lv
-1413.50
11
12
-1285.00
C3
14
-1285.00
C2
15
379.90
-1285.00
C1
16
677.30
-1285.00
R4
17
842.70
-1285.00
R3
18
1173.30
-1285.00
R2
19
Te
ch
ni
ca
-49.70
214.50
Revision 8.10
Page 21 of 25
austriamicrosystems
Data Sheet AS2533-36
Vertical Structure of Bond Pads
Process CXQ/CXB – FAB B
metal 2
metal 1
metal 1 barrier
metal 1
lower layer:
upper layer:
polysilicon
lower layer:
metal 1 barrier
upper layer
lower layer
80nm Titanium Nitride
30nm Titanium
270 nm polysilicon
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st
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Si
substrate
lv
oxide
960 nm AISiCu
98.5% Aluminium
1.0% Silicon
0.5 % Copper
40 nm Titanium
450 nm AISiCu
98.5 % Aluminium
1.0% Silicon
0.5 % Copper
40 nm Titanium
al
id
Layer Specification
metal 2
upper layer:
polysilicon
oxide
silicon substrate
General Conditions
Passivation
Marking of Failure Dice
Allowed Loss after Assembly
460 nm thermal oxide
200 nm silicon oxynitride + 550 nm silicon nitride
Ink Dots, water resistant, Diameter 0.4...1.2 mm
< 5% in average
< 10% for a single delivery lot
Compensation is limited to replacement of the number of defectives exceeding the above
allowances.
Quantity of dice per delivery lot Only complete wafers can be delivered, therefore the number of good dice delivered may
differ from the order quantity up to ±1000 pcs.
Dice on wafer or dice on foil must be stored in originally sealed boxes or bags.
For storage period - see below.
Except for RMA, opened boxes or bags will not be accepted by austriamicrosystems for return
ca
Storage Conditions
ni
Conditions for Delivery as Wafer
Wafer diameter
200 mm (ams-FAB-B) or 150 mm (XFAB)
Wafer thickness
380 ± 20µm (ams-FAB-B) or 640 ± 20µm (XFAB)
back grinding, silicon
Scribe lane width
100 ± 20µm
Packing
Max. Storage time in sealed
box
Wafer Box Ultrapack 200 / sealed in foil bags
Te
ch
Back finishing
Revision 8.10
6 month, Tamb = 25 ° C
Page 22 of 25
austriamicrosystems
Data Sheet AS2533-36
Conditions for Delivery as Dice on Foil, sawn
Die thickness
380 ± 20µm
Back finishing
back grinding, silicon
Frame
Material: Plastic
Size: see figure
Frame Position Tolerance
Center wafer to frame: ± 4mm
Tape
al
id
Angle deviation wafer to frame: ± 8°
Orientation wafer to frame: Wafer flat to frame side with kerfs
Covering adhesive foil to frame: >5mm
Type: PVC with acrylic adhesive
Sawing mode: Saw - through mode
Sawing width: typ. 60 µm
Kerf depth in foil: typ. 20 µm
XV -dimension deviation: max.25 µm
frame sealed in foil bags filled with nitrogen
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st
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Sawing conditions
lv
Thickness: 70 ± 20 µm
Packing
Storage time In sealed bags
2 months, Tamb = 25 ° C
Te
ch
ni
ca
Mechanical Drawing of Frame (valid for 200 mm and 150 mm wafer)
Revision 8.10
Page 23 of 25
austriamicrosystems
Data Sheet AS2533-36
Pin Configuration
Packaging
28 Pin SOIC (suffix T)
The device is available in the packages outlined below (not
to scale). For exact mechanical package dimensions
please see austriamicrosystems AG packaging information.
18.1mm / 713mil
7.6mm / 300mil
1.27mm / 50mil
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Max. Body Length
Max. Body Width
Pitch
lv
al
id
28-pin plastic SOIC (suffix T)
Ordering Information
Order Number
Package
Features
AS2533 T
AS2533U-ZSO-U
28 pin SOIC in tubes
LNR, 4 direct/10 indirect memories
AS2533 F
pls see bottom rows
Dice on foil, sawn
LNR, 4 direct/10 indirect memories
AS2533 W
pls see bottom rows
Dice on wafer
LNR, 4 direct/10 indirect memories
AS2534B T
AS2534U-ZSO-U
28 pin SOIC in tubes
LNR only, no direct/indirect memories
AS2534B F
pls see bottom rows
Dice on Foil, sawn
LNR only, no direct/indirect memories
AS2534B W
pls see bottom rows
Dice on Wafer
LNR only, no direct/indirect memories
AS2534R T
AS2534R-ZSO-U
28 pin SOIC in tubes
LNR only, no direct/indirect memories, ringer fixed
AS2534R F
pls see bottom rows
Dice on Foil, sawn
LNR only, no direct/indirect memories, ringer fixed
AS2534R W
pls see bottom rows
Dice on Wafer
LNR only, no direct/indirect memories, ringer fixed
AS2535 T
AS2535U-ZSO-U
28 pin SOIC
LNR, 12 direct memories
AS2535 F
pls see bottom rows
Dice on Foil, sawn
LNR, 12 direct
AS2535 W
pls see bottom rows
Dice on Wafer
LNR, 12 direct
AS2536 T
AS2535U-ZSO-U
28 pin SOIC
LNR, 4 direct/10 indirect memories
ni
ca
Device
pls see bottom rows
Dice on Foil, sawn
LNR, 4 direct/10 indirect memories
AS2536 W
pls see bottom rows
Dice on Wafer
LNR, 4 direct/10 indirect memories
ch
AS2536 F
AS253xU-ZSW-F
Dice on Foil, sawn
All versions
( 1)
AS253x W
AS253xU-ZSW
Dice on Wafer
All versions
( 1)
AS253xR F
AS253xR-ZSW-F
Dice on Foil, sawn
All versions, ringer fixed
(1)
AS253xR W
AS253xR-ZSW
Dice on Wafer
All versions, ringer fixed
(1)
Te
AS253x F
( 2)
(2)
Please Note:
For wafer delivery or dice-on-foil delivery, the versions can be selected by bond options.
(2) For deliveries as packaged devices (SOIC28), LNR only is tested, direct and indirect memories are not tested!
(1)
Revision 8.10
Page 24 of 25
austriamicrosystems
Data Sheet AS2533-36
Contact Information
al
id
austriamicrosystems AG
Business Unit Communications
A 8141 Schloss Premstaetten, Austria-EU
T. +43 (0) 3136 500 0
F. +43 (0) 3136 500 5692
http://www.austriamicrosystems.com
For Sales Offices, Distributors and Representatives, please visit:
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http://www.austriamicrosystems.com/contact
Copyright © 1997-2006, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. 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.
All products and companies mentioned are trademarks of their respective companies.
Disclaimer
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Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its
Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the
information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems
AG 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 austriamicrosystems AG 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 equipment are specifically
not recommended without additional processing by austriamicrosystems AG for each application.
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The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However,
austriamicrosystems AG 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 austriamicrosystems AG rendering of technical or
other services.
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Revision 8.10
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