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75T204-IL 데이터시트 PDF




ETC에서 제조한 전자 부품 75T204-IL은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 75T204-IL 자료 제공

부품번호 75T204-IL 기능
기능 5V Low-Power Subscriber DTMF Receiver
제조업체 ETC
로고 ETC 로고


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75T204-IL 데이터시트, 핀배열, 회로
DESCRIPTION
The 75T204 is a complete Dual-Tone Multifrequency
(DTMF) receiver that detects 16 standard digits. No
front-end pre-filtering is needed. The only external
components required are an inexpensive 3.58-MHz
television “colorburst” crystal for frequency reference
and a bias resistor. An Alternate Time Base (ATB)
is provided to permit operation of up to 10 75T204's
from a single crystal. The 75T204 employs state-of-
the-art "switched-capacitor" filter technology,
resulting in approximately 40 poles of filtering, and
digital circuitry on the same CMOS chip. The analog
input signal is pre-processed by 60-Hz reject and
band split filters and then zero-cross detected to
provide AGC. Eight bandpass filters detect the
individual tones. Digital processing is used to
measure the tone and pause durations
(continued)
75T204
5V Low-Power Subscriber
DTMF Receiver
FEATURES
April 2000
Intended for applications with less
requirements than the 75T202/75T203
14-pin plastic DIP or 16-pin SO package for
high system density
NO front-end band-splitting filters required
Single low-tolerance 5-volt supply
Detects all 16 standard DTMF digits.
Uses an inexpensive 3.579545-MHz crystal
Excellent speech immunity
Output in 4-bit hexadecimal code
Three-state outputs for microprocessor
interface
BLOCK DIAGRAM
ANALOG
PRE-PROCESSOR
60 Hz
REJECT
PREEMP
ATB
XEN
XIN
1Mz
XOUT
÷8
BAND
SPLIT
FILTERS
BS1
ZERO
CROSSING
DETECTORS
BANDPASS FILTERS
697
770
852
941
BS2
1209
1336
1477
CLOCK
GENERATOR
1633
CHIP CLOCKS
AMPLITUDE
DETECTORS
TIMING
CIRCUITRY
DV
DATA STROBE
OUTPUT
DECODER
OUTPUT
REGISTER
POWER REGULATOR
VP GND
VOLTAGE
REF
DATA CLEAR
DV
D1
D2
D4
D8
EN




75T204-IL pdf, 반도체, 판매, 대치품
75T204
5V Low-Power Subscriber
DTMF Receiver
DTMF DIALING MATRIX
See Figure 3. Please note that column 3 is for special applications and is not normally used in telephone dialing.
Col 0
Row 0
1
Col 1
2
Col 2
3
Col 3
A
Row 1
4
5
6
B
Row 2
7
8
9
C
Row 3
*
0
#
D
FIGURE 3: DTMF Dialing Matrix
Analog
Input
D1, D2,
D4, D8
DV
ton
Tone burst 1
tD
toff
Pause
tR
Tone burst 2
tS tH
FIGURE 4: Timing Diagram
4

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75T204-IL 전자부품, 판매, 대치품
75T204
5V Low-Power Subscriber
DTMF Receiver
ELECTRICAL SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
(Operation above absolute maximum ratings may damage the device. All 75T204 unused inputs must be
connected to VP or GND, as appropriate.)
PARAMETER
DC Supply Voltage - VP
Operating Temperature
Storage Temperature
Power Dissipation (25°C)
Input Voltage (All inputs except ANALOG IN)
ANALOG IN Voltage
DC Current into any Input
Lead Temperature - Soldering, 10 sec.
RATING
+7V
-40°C to +85°C Ambient
-65°C to +150°C
65mW
(VP + 0.5V) to -0.5V
(VP + .5V) to (V P - 10V)
±1.0mA
300°C
ELECTRICAL CHARACTERISTICS
(-40°C ² TA ² +85°C, V P = 5V ± 10%)
PARAMETER
Frequency Detect Bandwidth
Amplitude for Detection
CONDITIONS
each tone
Twist Tolerance
Twist= High Tone
Low Tone
60-Hz Tolerance
Dial Tone Tolerance
“precise” dial tone
Talk Off
MITEL tape #CM 7290
Digital Outputs
“0” level, 400µA load
(except XOUT)
“1” level, 200µA load
Digital Inputs
“0” level
“1” level
Power Supply Noise
wide band
Supply Current
TA = 25°C
Noise Tolerance
MITEL tape #CM 7290
Input Impedance
VP³V IN³V P-10
* dB referenced to lowest amplitude tone
MIN
±(1.5+2Hz)
-32
-10
TYP
±2.3
0
VP-0.5
0
0.7V P
2
10
100K ||15pF
MAX
±3.5
-2
+10
UNITS
% of fO
dBm ref.
to 600
dB
0.8
0dB
0.5
VP
0.3V P
VP
10
16
-12
Vrms
dB*
hits
V
V
V
V
mV p-p
mA
dB*
7

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관련 데이터시트

부품번호상세설명 및 기능제조사
75T204-IL

5V Low-Power Subscriber DTMF Receiver

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75T204-IP

5V Low-Power Subscriber DTMF Receiver

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