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What is SC9270D?

This electronic component, produced by the manufacturer "Silan Semiconductors", performs the same function as "DTMF DEMODULATOR WITH FILTER AND DIGITAL DECODER".


SC9270D Datasheet PDF - Silan Semiconductors

Part Number SC9270D
Description DTMF DEMODULATOR WITH FILTER AND DIGITAL DECODER
Manufacturers Silan Semiconductors 
Logo Silan Semiconductors Logo 


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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

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SC9270D equivalent
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


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for SC9270D electronic component.


Information Total 12 Pages
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Featured Datasheets

Part NumberDescriptionMFRS
SC9270The function is DTMF DEMODULATOR WITH FILTER AND DIGITAL DECODER. Silan SemiconductorsSilan Semiconductors
SC9270CThe function is DTMF DEMODULATOR WITH FILTER AND DIGITAL DECODER. Silan SemiconductorsSilan Semiconductors
SC9270DThe function is DTMF DEMODULATOR WITH FILTER AND DIGITAL DECODER. Silan SemiconductorsSilan Semiconductors

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