|
IN9270 Datasheet, PDF (1/11 Pages) Integral Corp. – DTMF RECEIVER High-Performance Silicon-Gate CMOS | |||
|
TECHNICAL DATA
DTMF RECEIVER
High-Performance Silicon-Gate CMOS
IN9270
The IN9270 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.
⢠Complete receiver in an 18-pin package.
⢠Excellent performance.
⢠CMOS, single 5 volt operation.
⢠Minimum board area.
⢠Central office quality.
⢠Low power consumption.
ORDERING INFORMATION
IN9270N
TA = -10° to 70° C
LOGIC DIAGRAM
PIN ASSIGNMENT
* Connect to GND
PIN 9 = GND
PIN 18 = VCC
PINS 5,6 = NO CONNECTION
1
|
▷ |