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PDF SC9270 Data sheet ( Hoja de datos )
| Número de pieza | SC9270 | |
| Descripción | DTMF DEMODULATOR WITH FILTER AND DIGITAL DECODER | |
| Fabricantes | Silan Semiconductors | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SC9270 (archivo pdf) en la parte inferior de esta página. Total 12 Páginas | ||
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SC9270
DTMF DEMODULATOR WITH FILTER AND DIGITAL DECODER
DESCRIPTION
The SC9270C/D is a complete DTMF receiver integrating both the
bandsplit filter and digital decoder functions. The filter section uses
switched capacitor techniques for high- and low-group filters and dial-
tone rejection. Digital counting techniques are employed in the decoder
to detect and decode all 16 DTMF tone-pairs into a 4-bit code. External
component count is minimized by on-chip provision of a differential
input amplifier, clock-oscillator and latched 3-state bus interface.
SOP-20-375-1.27
FEATURES
DIP-18-300-2.54
* Excellent performance
* CMOS, single 5 volt operation,
* Widely operating voltage: 1.2V ~ 5.25V
* Minimum board area
* Central office quality
* Low power consumption
* Power-Down mode (SC9270D only)
* Inhibit-mode (SC9270D only)
APPLICATIONS
* Paging systems
* Repeater systems / Mobile radio
* Credit card systems
* Remote control
* Personal computers
ORDERING INFORMATION
Device
SC9270C
SC9270D
SC9270DS
Package
DIP-18-300-2.54
DIP-18-300-2.54
SOP-20-375-1.27
BLOCK DIAGRAM
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Downloaded from Elcodis.com electronic components distributor
REV:1.2 2005.03.24
Page 1 of 13
1 page  
PIN CONFIGURATIONS
SC9270
PIN DESCRIPTION
Pin No.
Pin
SC9270C SC9270D SC9270DS Name
Description
11
1 IN+ Non-Inverting input Connections to the front-end differential
22
2 IN- Inverting input amplifier.
33
Gain select. Gives access to output of front-end differential
3 GS
amplifier for connection of feedback resistor.
44
Reference voltage output, nominally VDD/2. May be used to
4 VREF
bias the inputs at mid-rail (see application diagram).
Inhibit (input) logic high inhibit the detection of 1633Hz internal
-- 5
5 INH built-in pull down resistor. (SC9270D only). (For SC9270C, this
pin must be tied to VSS )
Power down (input). Active high power down the device and
-- 6
6 PWDN inhibit the oscillator internal built-in pull down resistor.
(SC9270D only). (For SC9270C, this pin must be tied to VSS )
77
88
7 OSC1 Clock Input
8 OSC2 Clock Output
3.579545MHz crystal connected
between these pins completes internal
oscillator.
99
9 VSS Negative power supply, normally connected to 0V.
3-state data output enable. Logic high enables the outputs Q1-
10 10 12 TOE
Q4. This pin is Internally pulled up.
3-state data outputs. When enabled by TOE, provide the code
11~14
11~14
13~16 Q1 ~ Q4 corresponding to the last valid tone-pair received (see Table 1).
When TOE is logic low, the data outputs are high impedance.
Delayed steering output. Presents a logic high when a received
15 15 17 StD tone-pair has been registered and the output latch updated;
returns to logic low when the voltage on St/GT falls below VTSt.
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
REV:1.2 2005.03.24
Page 5 of 13
Downloaded from Elcodis.com electronic components distributor
5 Page 
PACKAGE OUTLINE
DIP-18-300-2.54
2.54
SC9270
UNIT: mm
0.5MIN
SOP-20-375-1.27
23.12±0.3
1.52
0.46
1.27MAX
15 Degree
UNIT: mm
1.27
12.7±0.25
11.43
0.4
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http: www.silan.com.cn
Downloaded from Elcodis.com electronic components distributor
0.25±0.05
3.1MAX
REV:1.2 2005.03.24
Page 11 of 13
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet SC9270.PDF ] | |
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