MOTOROLA MC145436A

Order this document
by MC145436A/D
SEMICONDUCTOR TECHNICAL DATA
Advance Information
The MC145436A is a low–power and improved input sensitivity version of the
MC14LC5436.
The MC145436A 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 MC145436A
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 telephony products.
The MC145436A offers the following performance features:
•
•
•
•
•
•
•
•
Single + 5 V Power Supply
Detects All 16 Standard Digits
Uses Inexpensive 3.58 MHz Crystal
Provides Guard Time Controls to Improve Speech Immunity
Output in 4–Bit Hexadecimal Code
Built–In 60 Hz and Dial Tone Rejection
Pin Compatible with SSI–204, MC145436, and MC14LC5436
Functional and Applicational Compatible with MC145436 and
MC14LC5436
P SUFFIX
PLASTIC DIP
CASE 646
14
1
DW SUFFIX
SOG PACKAGE
CASE 751G
16
1
ORDERING INFORMATION
MC145436AP
Plastic DIP
MC145436ADW SOG Package
PIN ASSIGNMENTS
PDIP
D2
1
14
D4
D1
2
13
D8
ENB
3
12
DV
VDD
4
11
ATB
GT
5
10
Xin
Xen
6
9
Xout
Ain
7
8
GND
D2
1
16
D4
D1
2
15
D8
SOG
ENB
3
14
DV
VDD
4
13
NC
NC
5
12
ATB
GT
6
11
Xin
Xen
7
10
Xout
Ain
8
9
GND
NC = NO CONNECTION
This document contains information on a new product. Specifications and information herein are subject to change without notice.
REV 1
1/96

Motorola, Inc. 1996
MOTOROLA
MC145436A
1
BLOCK DIAGRAM
697
Ain
60 Hz
REJECTION
FILTER
BS1
770
GT
TIMING
CIRCUIT
852
DV
941
PREAMP
1209
BS2
OUTPUT
DECODER
1336
ENB
1477
1633
D1
ATB
VOLTAGE
REF
Xen
Xin
Xout
MC145436A
2
÷8
CLOCK
GEN
D2
OUTPUT
REGISTER
CHIP
CLOCKS
D4
D8
MOTOROLA
MAXIMUM RATINGS (Voltages Referenced to GND Unless Otherwise Noted)
Symbol
Value
Unit
VDD
– 0.5 to + 6.0
V
Input Voltage, Any Pin Except Ain
Vin
– 0.5 to VDD + 0.5
V
Input Voltage, Ain
Vin
VDD – 10 to VDD + 0.5
V
I
± 10
mA
PD
100
mW
TA
– 40 to + 85
°C
Tstg
– 65 to + 150
°C
Rating
DC Supply Voltage
DC Current Drain per Pin
Power Dissipation
Operating Temperature Range
Storage Temperature Range
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
Vin and Vout be constrained to the range VSS ≤
(Vin or Vout) ≤ VDD. Reliability of operation is
enhanced if unused inputs are tied to and
appropriate logic voltage level (e.g., either VSS
or VDD).
ELECTRICAL CHARACTERISTICS
(All Polarities Referenced to VSS = 0 V, VDD = 5.0 V ± 10%, TA = – 40 to + 85°C, Unless Otherwise Noted)
Symbol
Min
Typ
Max
Unit
DC Supply Voltage
VDD
4.5
5
5.5
V
Supply Current (fCLK = 3.58 MHz)
IDD
—
5
8
mA
Parameter
Input Current
GT
ENB, Xin, Xen
Iin
—
—
—
—
450
±1
µA
Input Voltage Low
ENB, GT, Xen
VIL
—
—
1.5
V
Input Voltage High
ENB, GT, Xen
VIH
3.5
—
—
V
IOH
800
—
—
µA
Iout Data and DV Pins: Vout = 4.5 V (Source)
Iout Data and DV Pins: Vout = 0.4 V (Sink)
Input Impedance
Fanout
Input Capacitance
IOL
1.0
—
—
mA
Ain
Rin
90
100
—
kΩ
ATB
Fout
—
—
10
Xen, ENB
Cin
—
6
—
pF
ANALOG CHARACTERISTICS (VDD = 5.0 V ± 10%, TA = – 40 to + 85°C, Unless Otherwise Noted)
Min
Typ
Max
Unit
Signal Level for Detection (Ain)
– 35
—
–2
dBm
Twist = High Tone/Low Tone
– 10
—
10
dB
Frequency Detect Bandwidth
± (1.5 + 2 Hz)
± 2.5
± 3.5
% fO
60 Hz Tolerance
—
—
0.8
Vr ms
Dial Tone Tolerance (Note 1)
(Dial Tone 330 + 440)
—
—
0
dB
Noise Tolerance (Notes 1 and 2)
—
—
– 12
dB
Power Supply Noise (Wide Band)
—
—
10
mV p–p
Talk Off (Mitel Tape #CM7290)
—
2
—
Hits
Parameter
NOTES:
1. Referenced to lower amplitude tone.
2. Bandwidth limited (0 to 3.4 kHz) Gaussian Noise.
MOTOROLA
MC145436A
3
AC CHARACTERISTICS (VDD = 5.0 V ± 10%, TA = – 40 to + 85°C)
Symbol
Min
Typ
Max
Unit
Tone On Time
For Detection
For Rejection
TONEon
40
—
—
—
—
20
ms
Pause Time
For Detection
For Rejection
TONEoff
40
—
—
—
—
20
ms
Detect Time
GT = 0
GT = 1
tdet
22
32
—
—
40
50
ms
Release Time
GT = 0
GT = 1
trel
28
18
—
—
40
30
ms
Data Setup Time
tsu
7
—
—
µs
Data Hold Time
th
4.2
4.6
5
ms
tw(GT)
18
—
—
µs
tlag(DV)
—
—
5
ms
ENB High to Output DV*
tEHDV
—
120
500
ns
ENB Low to Output High–Z*
tELDZ
—
110
300
ns
Characteristic
Pulse Width
GT
DV Reset Lag Time
* Data out: CL = 35 pF k RL = 500 Ω .
TIMING DIAGRAM
TONEon
ANALOG INPUT
(Ain)
TONEoff
TONE BURST 1
TONE BURST 2
tdet
trel
D1, D2
D4, D8
HIGH–Z
tsu
HIGH–Z
th
DV
tELDZ
tlag(DV)
tEHDV
tELDZ
ENB
tw(GT)
GT
MC145436A
4
MOTOROLA
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.
VSS
Ground (PDIP — Pin 8, SOG — Pin 9)
Ground return pin is typically connected to the system
ground.
D1, D2, D4, D8
Data Output (PDIP — Pins 2, 1, 14, 13; SOG — Pins 2, 1,
16, 15)
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 0.
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 0.
GT
Guard Time (PDIP — Pin 5, SOG — Pin 6)
The guard time control input provides two sets of detected
time and release time, both within the allowed ranges of tone
on and tone off (see Figure 1). A longer tone detect time
rejects signals too short to be considered valid. With GT = 1,
talk off performance is improved, since it reduces the probability that tones simulated by speech will maintain signal
conditions long enough to be accepted. In addition, a shorter
release time reduces the probability that a pause simulated
by an interrupt in speech will be detected as a valid pause.
On the other hand, a shorter tone detect time with a long
Table 1. Hexadecimal Codes
Output Code
Digit
D8
D4
D2
D1
1
0
0
0
1
2
0
0
1
0
3
0
0
1
1
4
0
1
0
0
5
0
1
0
1
6
0
1
1
0
7
0
1
1
1
8
1
0
0
0
9
1
0
0
1
0
1
0
1
0
*
1
0
1
1
#
1
1
0
0
A
1
1
0
1
B
1
1
1
0
C
1
1
1
1
D
0
0
0
0
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
MC145436A is immediately ready to accept a new tone
input. If left open, this pin is internally pulled to ground.
Xen
Oscillator Enable (PDIP — Pin 6, SOG — Pin 7)
A logic 1 on Xen enables the on–chip crystal oscillator.
When using alternate time base from the ATB pin, Xen should
be tied to VSS.
Ain
Analog Input (PDIP — Pin 7, SOG — Pin 8)
This pin accepts the analog input and is internally biased
so that the input signal may be ac coupled. The input may be
dc coupled so long as it does not exceed the positive supply
(see Figure 2).
Xin/Xout
Oscillator In and Oscillator Out (PDIP — Pins 10, 9;
SOG — Pins 11, 10)
These pins connect to an internal crystal oscillator. In operation, a parallel resonant crystal is connected from X in to
X out, as well as a 1 M Ω resistor in parallel with the crystal.
When using the alternate clock source from ATB, X in should
be tied to VDD.
ATB
Alternate Time Base (PDIP — Pin 11, SOG — Pin 12)
This pin serves as a frequency reference when more than
one MC145436A is used, so that only one crystal is required
for multiple MC145436As. When doing so, all ATB pins
should be tied together as shown in Figure 3. When only one
MC145436A 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.
GUARD TIME
5
VDD
Figure 1. Guard Time
MC145436A
5
Vin
VDD
t VDD
Vin
u VDD
0.01 µF
10 pF
7
Ain
VDD
10 pF
7
Ain
100 kΩ
100 kΩ
Figure 2. Analog Input (Operational Information Based on PDIP Package)
3.58 MHz
Xin
Xout
1 MΩ
ATB
MC145436A
VDD
Xen
VDD
Xin
ATB
MC145436A
Xen
TO OTHER
MC145436As
Figure 3. Multiple MC145436As
MC145436A
6
STD
DTMF
(Hz)
COL 1
COL 2
COL 3
COL 4
697
1
2
3
A
ROW 1
770
4
5
6
B
ROW 2
852
7
8
9
C
ROW 3
941
*
0
#
D
ROW 4
1209
1336
1477
1633
STD DTMF (Hz)
Figure 4. 4 × 4 Keyboard Matrix
MOTOROLA
PACKAGE DIMENSIONS
P SUFFIX
PLASTIC DIP
CASE 646–06
14
8
1
7
NOTES:
1. LEADS WITHIN 0.13 (0.005) RADIUS OF TRUE
POSITION AT SEATING PLANE AT MAXIMUM
MATERIAL CONDITION.
2. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
3. DIMENSION B DOES NOT INCLUDE MOLD
FLASH.
4. ROUNDED CORNERS OPTIONAL.
B
A
F
DIM
A
B
C
D
F
G
H
J
K
L
M
N
L
C
J
N
H
G
D
SEATING
PLANE
K
M
INCHES
MIN
MAX
0.715
0.770
0.240
0.260
0.145
0.185
0.015
0.021
0.040
0.070
0.100 BSC
0.052
0.095
0.008
0.015
0.115
0.135
0.300 BSC
0_
10_
0.015
0.039
MILLIMETERS
MIN
MAX
18.16
19.56
6.10
6.60
3.69
4.69
0.38
0.53
1.02
1.78
2.54 BSC
1.32
2.41
0.20
0.38
2.92
3.43
7.62 BSC
0_
10_
0.39
1.01
DW SUFFIX
SOG PACKAGE
CASE 751G–02
–A–
16
9
–B–
8X
P
0.010 (0.25)
1
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE MOLD
PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006) PER
SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.13 (0.005) TOTAL IN
EXCESS OF D DIMENSION AT MAXIMUM
MATERIAL CONDITION.
M
B
M
8
16X
J
D
0.010 (0.25)
M
T A
S
B
S
F
R X 45 _
C
–T–
14X
MOTOROLA
G
K
SEATING
PLANE
M
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
10.15
10.45
7.40
7.60
2.35
2.65
0.35
0.49
0.50
0.90
1.27 BSC
0.25
0.32
0.10
0.25
0_
7_
10.05
10.55
0.25
0.75
INCHES
MIN
MAX
0.400
0.411
0.292
0.299
0.093
0.104
0.014
0.019
0.020
0.035
0.050 BSC
0.010
0.012
0.004
0.009
0_
7_
0.395
0.415
0.010
0.029
MC145436A
7
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the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit,
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MC145436A
8
◊
*MC145436A/D*
MC145436A/D
MOTOROLA