SC9270C Datasheet, PDF (1/12 Pages) Silan Microelectronics Joint-stock – DTMF RECEIVER

Silan
Semiconductors
SC9270C/D
DTMF RECEIVER
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.
FEATURES
*Complete receiver in an 18-pin package
*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)
DIP-18
APPLICATIONS
*Paging systems
*Repeater systems / Mobile radio
*Credit card systems
*Remote control
*Personal computers
PIN CONFIGURATIONS
IN+ 1
IN- 2
GS 3
VREF 4
IC* 5
IC* 6
OSCI 7
OSCO 8
VSS 9
18 VDD
17 St/GT
16 ESt
15 StD
14 Q4
13 Q3
12 Q2
11 Q1
10 TOE
* Connect to VSS
IN+ 1
IN- 2
GS 3
VREF 4
INH 5
PWDN 6
OSCI 7
OSCO 8
VSS 9
18 VDD
17 St/GT
16 ESt
15 StD
14 Q4
13 Q3
12 Q2
11 Q1
10 TOE
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
Rev: 1.1 2001.04.27
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