Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

IN9270 Datasheet(PDF) 2 Page - Integral Corp.

Part # IN9270
Description  DTMF RECEIVER High-Performance Silicon-Gate CMOS
Download  11 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  INTEGRAL [Integral Corp.]
Direct Link  http://www.iksemi.com/
Logo INTEGRAL - Integral Corp.

IN9270 Datasheet(HTML) 2 Page - Integral Corp.

  IN9270 Datasheet HTML 1Page - Integral Corp. IN9270 Datasheet HTML 2Page - Integral Corp. IN9270 Datasheet HTML 3Page - Integral Corp. IN9270 Datasheet HTML 4Page - Integral Corp. IN9270 Datasheet HTML 5Page - Integral Corp. IN9270 Datasheet HTML 6Page - Integral Corp. IN9270 Datasheet HTML 7Page - Integral Corp. IN9270 Datasheet HTML 8Page - Integral Corp. IN9270 Datasheet HTML 9Page - Integral Corp. Next Button
Zoom Inzoom in Zoom Outzoom out
 2 / 11 page
background image
IN9270
2
PIN DESCRIPTIONS
NAME
PIN
DESCRIPTION
ESt
16
Early steering output. Presents a logic high immediately when the digital
algorithm detects a recognizable tone-pair (signal condition). Any momentary loss
of signal condition will cause ESt to return to a logic low.
GS
3
Gain Select. Gives access to output of front-end differential amplifier for
connection of feedback resistor.
IC
5,6
Internal Connection. Must be tied to GND.
IN+
1
Non-Inverting Input
Connections to the front-end
IN-
2
Inverting Input
differential amplifier.
C1
7
Clock Input
3.579545 MHz crystal connected between
C2
8
Clock Output
these pins completes internal oscillator.
Q1-Q4
11-14
3-state data outputs. When enabled by OE, provide the code corresponding to the
last valid tone-pair received.
StD
15
Delayed steering output. Presents a logic high when a received tone-pair has been
registered and the output latch updated; returns to logic low when the voltage on
St/GT falls below VTSt.
St/GT
17
Steering input/guard time output (bi-directional). A voltage greater than VTSt,
detected at St causes the device to register the detected tone-pair and update the
output latch. A voltage less than VTSt frees the device to accept a new tone-pair.
The GT output acts to reset the external steering time-constant; its state is a
function of ESt and the voltage on St.
OE
10
3-state output enable (input). Logic high enables the outputs Q1-Q4. Internal pull-
up.
VCC
18
Positive power supply, +5 V.
VREF
4
Reference voltage output, nominally VCC /2. May be used to bias the inputs at
mid-rail.
GND
9
Negative power supply, normally connected to 0 V.
FUNCTIONAL DESCRIPTION
The IN9270 monolithic DTMF receivers offer small
size, low power consumption and high performance.
The architecture consists of a bandsplit filter section,
which separates the high and low tones of a receiver
pair, followed by a digital counting section which
verifies the frequency and duration of the received
tones before passing the corresponding code to the
output bus.
Filter Section
Separation of the low-group and high-group tones is
achieved byapplying the dual-tone signal to the inputs
of two filters - a sixth order for the high group and an
eight order for the low group. The band-widths of
which correspond to the bands enclosing the low-
group and high-group tones (see Figure 1). The filter
section also incorporates notches at 350 Hz and
440 Hz for exceptional dial-tone rejection. Each filter
output is followed by a second order switched-
capacitor section which smooths the signals prior to
limiting.
Limiting
is
performed
by
high-gain
comparators which are provided with hysteresis to
prevent detection of unwanted low-level signals and
noise; the outputs of the comparators provide full-rail
logic swings at the frequencies of the incoming tones.


Similar Part No. - IN9270

ManufacturerPart #DatasheetDescription
logo
List of Unclassifed Man...
IN9004 ETC1-IN9004 Datasheet
410Kb / 14P
   INTEGRATED MICROCHIP MICRO-CONTROLLER
IN9004-1 ETC1-IN9004-1 Datasheet
410Kb / 14P
   INTEGRATED MICROCHIP MICRO-CONTROLLER
IN9004D ETC1-IN9004D Datasheet
410Kb / 14P
   INTEGRATED MICROCHIP MICRO-CONTROLLER
logo
Integral Corp.
IN90LS2323D INTEGRAL-IN90LS2323D Datasheet
189Kb / 9P
   8-BIT MICROCONTROLLER WITH 2K BYTES BUILD-IN PROGRAMMABLE FLASH
IN90LS2333DW INTEGRAL-IN90LS2333DW Datasheet
221Kb / 12P
   8-BIT MICROCONTROLLER WITH 2K/4K BYTES BUILD-IN PROGRAMMABLE FLASH
More results

Similar Description - IN9270

ManufacturerPart #DatasheetDescription
logo
KODENSHI_AUK CORP.
KK9270 KODENSHI-KK9270 Datasheet
579Kb / 12P
   DTMF RECEIVER High-Performance Silicon-Gate CMOS
logo
Integral Corp.
IL9270 INTEGRAL-IL9270 Datasheet
559Kb / 12P
   DTMF RECEIVER High-Performance Silicon-Gate CMOS
logo
California Micro Device...
CM8870 CALMIRCO-CM8870 Datasheet
231Kb / 8P
   CMOS Integrated DTMF Receiver
logo
ON Semiconductor
MC74HC4052 ONSEMI-MC74HC4052 Datasheet
213Kb / 16P
   High-Performance Silicon-Gate CMOS
logo
Motorola, Inc
MC74HC27A MOTOROLA-MC74HC27A Datasheet
138Kb / 5P
   High-performance Silicon-gate CMOS
logo
ARTSCHIP ELECTRONICS CO...
MC74HC595A ARTSCHIP-MC74HC595A Datasheet
1Mb / 10P
   High-Performance Silicon-Gate CMOS
logo
Motorola, Inc
74HC245A MOTOROLA-74HC245A Datasheet
142Kb / 7P
   High–Performance Silicon–Gate CMOS
logo
Mitel Networks Corporat...
MT8870D MITEL-MT8870D Datasheet
215Kb / 12P
   ISO2-CMOS Integrated DTMF Receiver
logo
Sanyo Semicon Device
LC7387M SANYO-LC7387M Datasheet
114Kb / 6P
   DTMF Receiver?
logo
List of Unclassifed Man...
HM9202 ETC1-HM9202 Datasheet
79Kb / 1P
   DTMF RECEIVER
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com