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SEMICONDUCTOR
TECHNICAL
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DATA
I
MC145436A
Advance Information
Low-Power Dual Tone
Multiple Frequency Receiver
The MCI 45436A is a low–power and improved input sensitivity version of the
MC14LC5436.
The MCI 45436A is a silicon gate CMOS LSI device containing the filter and
decoder for detection of a pair of tones conforming to the DTMF standard with
outputs in hexadecimal. Switched capacitor filter technology is used together
with digital circuitry for the timing control and output circuits. The MCI 45436A
provides excellent power line noise and dial tone rejection and is suitable for
applications in central office equipment, PABX, and keyphone systems, remote
control equipment and consumer telephonv ~roducts.
The MC1 45436A offers the following pe;ormance features:
,?.sr*.,!
../
h
at,,,.
,,:>.?,,.:,,,,,..
‘$lJ<,
.&“
Uses Inexpensive 3.58 MHz Crystal
~’..;i}
Provides Guard Time Controls to Improve Speech Immunity
‘
$.,.’$i$,~,
,.,.~k?~.
\ ,:...
.>?
Output in &Bit Hexadecimal Code
~x..
‘*..!
:yk&,
\<F*
Built–In 60 Hz and Dial Tone Rejection
~‘\:>
~\“..:jk!\.
Pin Compatible with SS1–204, MC1 45436, and MCI 4LC54S~;w{,
Functional and Applicational Compatible with MCI 45436 and “t+
~>,:i$ #>.\:.
,
MC14LC5436
,,;*ING
INFORMATION
“~~145436AP
MCI 45436ADW
Plastic DIP
SOG Package
Single + 5 V Power Supply
Detects All 16 Standard Digits
PIN ASSIGNMENTS
PDIP
D2
1*
14
D4
D1
2
13
Da
ENB
3
12
DV
VDD
4
11
ATE
GT
5
10
Xin
Xen
6
9
Xout
A“ n 7
8
GND
SOG
D2 [
10
16 ] D4
D1 [ 2
15 ] D8
ENB [ 3
14 ] DV
VDD [ 4
13 ] NC
NC [ 5
12 ] ATB
GT [ 6
11 ] Xi”
Xen [ 7
10 ] Xout
4“ ~ 8
9 ~ GND
NC= NO CONNECTION
@
his document contains information on a new product. Specifications and information herein are subject to change without notice
REV O
7/95
MOTOROLA
@ Motorola,
Inc. 1995
@
I
BLOCK DIAGRAM
FILTER
Y
v
PREAMP
m
*I
IL
1
)1
+
D2
v
MC145436A
2
MOTOROLA
MAXIMUM RATINGS (Voltages Referenced to GND Unless Otherwise Noted)
I
Rating
I
Symbol
VDD
DC Supply Voltage
I
\ Input Voltage, Ain
I DC Current Drain per Pin
I
lpDl
~Operating Temperature
=9eTemperature
Range
Range
I
Unit
v
I
lvDD-lotOvDD+o.5
I
I
I
TA
I
I
Tsta
I
V
*1O
lrnAl
100
lmwl
–40to
-65to
This device contains circuitry to protect the
inputs against damage due to high static voltages or electric fields; however, it is advised that
normal precautions be taken to avoid applications of any voltage higher than the maximum
rated voltages to this high impedance circuit.
For proper operation it is recommended that
~n and Vout be constrained to the range ~l:ss
(~n or Vout) s VDD. Reliability of ope~~~:~iis
enhanced if unused inputs are tiR@ ~. ~Hd
1
v
+ 6.0
– 0.5 to VDD + 0.5
~n
I Power Dissipation
Value
–0.5to
W“
Input Voltage, Any Pin Except fin
ELECTRICAL
I
+85
I“cl
+150
I“cl
I
,.k,,$+....
,!!+,,>~~
.{:::$..~.>:$:,
...
CHARACTERISTICS
(All Polarities Referenced to VSS = O V, VDD = 5.0 V t 10Y., TA = -40
to + 85”C, Unless Othemise
Symbol
Parameter
DC Supply Voltage
VDD
Supply Current (fCLK = 3.58 MHz)
IDD
Input Current
GT
ENB, Xin, Xen
Iin
Input Voltage Low
ENB, GT, Xen
VIL
Noted)
Ty&,
Min
>,,+;;~;+
4.5
. . ...
*,:. 1>+ ‘.,
— .+:$,,
~
.3;
~)$.
?5
~
\?b.:
,’,“., *F?_
_’*;<;v:%$
~,,~..
‘,.-t,.> \*
—
\,~ it,,
,,\t .$,
~>...
\t;:,~~’_
—
$; ‘J~&, .>3
ENB, GT, Xen
vl,~$~i~l &.$$x3.5
‘,?3:+
~
,J~iOH e:
800
.,.. ,,.~>
-.
+:<>
f&L
1.0
*:;,*
Input Voltage High
lout Data and DV Pins: Vout = 4.5 V (Source)
lout Data and DV Pins: Vout = 0.4 V (Sink)
Input Impedance
,a:x<$~: :,+$ ‘in
~,~~
Fout
Fanout
,>(.
Input Capacitance
X~\, ENB
:?.’,
?,.,.
,>.,
.!,,,..1..,l~\\&.
l,$;l,, ‘1.!
Cin
5.5
v
8
mA
450
*1
PA
1.5
v
—
—
v
—
—
PA
—
—
mA
90
100
kQ
—
—
10
—
6
—
pF
.$: {.*
C,,. Yd>,,
.
9
Signal Level for Detection (fin)
..
Twist = High Tone/Low Tone
~
,$’~~‘“~i?~
,.,6
Min
Typ
Max
Unit
– 35
—
–2
dBm
–lo
—
10
dB
~(1.5+2
t 2.5
* 3.5
0/0fo
60 Hz Tolerance
—
—
0,8
Vrms
Dial Tone Tolerance (Not$ 1)~’a$s
—
—
o
dB
—
—
-12
dB
—
—
10
mV p–p
—
2
—
Hits
Frequency Detect Bandwidth
Hz)
(Dial Tone 330 + 4+$]$$ ,<,:,
Noise Tolerance (W~~,,l’<~nd
.. .
power Supply w~(~de
Talk Off ~~e~%~e
2)
Band)
#CM7290)
NOT&@$ ~~s~$
l$i@~Wnced
to lower amplitude tone.
$$~~~,~%dwidth limited (O to 3.4 kHz) Gaussian Noise.
~,.,,, ~
~:..
.8,,
MOTOROLA
MC145436A
3
AC CHARACTERISTICS (VDD = 5.o V t IOY., TA = -40
to +
85°C)
Characteristic
Tone On Time
MC145436A
4
Symbol
For Detection
For Rejection
TONEon
Min
Typ
Max
Unit
40
—
—
—
—
ms
20
MOTOROLA
release time would be appropriate for an extremely noisy
environment where fast acquisition time and immunity to
dropouts would be required. In general, the tone signal time
generated by a telephone is 100 ms, nominal, followed by a
pause of about 100 ms. A high–to–low or low–to–high transition on the GT pin resets the internal
logic and the
MCI 45436A is immediately
ready to accept a new tone
PIN DESCRIPTIONS
VDD
Positive Power Supply (PDIP, SOG — Pin 4)
The digital supply pin, which is connected to the positive
side of the power supply.
9
Vss
Ground (PDIP — Pin 8, SOG — Pin 9)
Ground
ground.
return pin is typically
connected
D1 , D2, D4, D8
Data Output (PDIP — Pins 2,1,14,
16, 15)
to the system
13; SOG — Pins 2,1,
These digital outputs provide the hexadecimal codes corresponding to the detected digit. The digital outputs become
valid after a tone pair has been detected and are cleared
when a valid pause is timed. See Table 1 for hexadecimal
codes. These output pins are high impedance when the
enable pin is at logic O.
!f{~.::l,, .,,..~’
>+, ,~,,+..
,..<>.
Ain
Analog Input (PDIP -,$RJfi~?!$.OG — Pin 8)
~ %{:$~;~
This pin accepts tM~~@~ldginput and is internally
so that the input siq~~,~~a~ be ac coupled. The input
dc coupled so lon&~~~ does not exceed the positive
(see Figure ~fi;,,
,,<*ii?+
,:~.
!J~--.’~
::*,$
*,.
Xin~@&}+,,,J
Osci*r’Yh
and Oscillator Out (PDIP — Pins 10,
SOG ~k~ins 11, 10)
ENB
Enable (PDIP, SOG — Pin 3)
Outputs D1, D2, D4, D8 are enabled when ENB is at a
logic 1, and high impedance (disabled) when ENB is at a
logic O.
biased
may be
supply
9;
~.*>.*$.
.:*IJ+,%ese pins connect to an internal c~stal oscillator. In oper~,~~,h,~~ion, a parallel resonant crystal is connected from Xin to
GT
Guard Time (PDIP — Pin 5, SOG — Pin 6)
t~Q~W,;yii~Xout,as well as a 1 MQ resistor in parallel with the crystal.
The guard time control input provides two sets of detecte&~””
When using the alternate clock source from ATB, Xin should
time and release time, both within the allowed ranges of t@e
be tied to VDD.
on and tone off (see Figure 1). A longer tone @%~i~ttime
rejects signals too short to be considered valid,.J,}w,k+>~,f,
Mh @T = 1,
ATB
talk off performance is improved, since it r@u~$Yhe
probAlternate Time Base (PDIP — Pin 11, SOG — Pin 12)
ability that tones simulated by speech ~~~~~~t~tain si9nal
This pin serves as a frequency reference when more than
conditions long enough to be accepte~.~,fiiwdition,
a shotier
one MCI 45436A is used, so that only one crystal is required
release time reduces the probability~~~&
pause simulated
for multiple MC145436AS. When doing so, all ATB pins
should be tied together as shown in Figure 3, When only one
MCI 45436A is used, this pin should be left unconnected.
The output frequency of ATB is 447.4 kHz.
DV
Data Valid (PDIP — Pin 12, SOG — Pin 14)
DV signals a detection by going high after a valid tone pair
is sensed and decoded at output pins D1, D2, D4, D8. DV
remains high until a loss of the current DTMF signal occurs
or until a transition in GT occurs.
I
I
19111010111
e
0
1
0
*
1
0
1
1
#
1
1
0
0
A
1
1
0
1
B
1
1
1
0
c
D
MOTOROLA
I
1
o
I
1
0
1
I
1
0
‘UARDT
=
0
I
I
I
1
0
I
Figure 1. Guard Time
MC145436A
K
r ——-
“..
r ——-
.
3,58 MHz
n
Xi”
Xout
VDD
1 MQ
--K
t
COL 3
R
w
TO OTHER
MC145436AS
Figure 3. Multiple MC145436AS
MC145436A
6
,.*.*
1209
1336
COL 4
m
m
‘owl
m
m
‘ow2
m
m
‘ow3
m
m
1477
‘OW4
1633
STD DTMF (Hz)
Figure 4.4 x 4 Keyboard Matrix
MOTOROLA
PACKAGE DIMENSIONS
P SUFFIX
PLASTIC DIP
CASE 646-06
NOTES
1 LEADS WITHIN 013 (0,005) RADIUS OF TRUE
POSITION AT SEATING PLANE AT MAXIMUM
.
\ /
1T
J
K
NOTES:
1. DIMENSIONING
ANO TOLERANCING PER ANSI
Y14.5M. 1982.
2. CONTROLLING DIMENSION
MILLIMETER.
3. DIMENSIONS A ANO B DO NOT INCLUDE MOLD
PROTRUSION,
4. MAXIMUM MOLD PROTRUSION 0.15 (O 006) PER
clnr
-----
5. DIMENSION O 00ES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN
EXCESS OF D DIMENSION AT MAXIMUM
MATERIAL CONDITION.
MOTOROLA
MC145436A
7
“ .&&t
‘..t?
.,V
,,,8+
‘:f~>-”
:,!;;
-..*,:;/“
%. ‘T:.
,*\. “~“..$..iti,,
?s.
a:
.,,,,,~~
‘J’.$.,:,,l
, \.*.:*.,
Motorola resew~~~~~hfto
make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding
the suitabilit~~bit~?~of ucts for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
and specific~ly di~l%lms any and all kabihty, including without limitation consequential or incidental damages. ‘Typica~ parameters can and do vary m clifferent
aPPlica$w.’’@eratin9n9
Parameters, includin9 ‘~YPicals” must De validated for each customer aPPlica~on by customer’s technical exPefls. Motorola does
not co~~$w.
license under its patent rights nor the rights of others. Motorola products are not designed, intendad, or authorized for use as components in
sy~,[email protected]
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th~<~xd~a
product could create a situation where personal injury or death may occur. Should Buyer purchase or use Motorola products for any such
um~nded
or unauthorized appticatfon, Buyer shall indemnify and hold Motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless
against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death
associated with such unintended or unauthorized use, even if such claim alleges that Motorola was negligent regarding the design or manufacture of the part.
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o
lA~
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@
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WA COMM YFAW
MC145436ND
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