tp5088 National Semiconductor Corporation, tp5088 Datasheet

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tp5088

Manufacturer Part Number
tp5088
Description
Tp5088 Dtmf Generator For Binary Data
Manufacturer
National Semiconductor Corporation
Datasheet

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C 1995 National Semiconductor Corporation
TP5088 DTMF Generator for Binary Data
General Description
This CMOS device provides low cost tone-dialing capability
in microprocessor-controlled telephone applications 4-bit
binary data is decoded directly without the need for conver-
sion to simulated keyboard inputs required by standard
DTMF generators With the TONE ENABLE input low the
oscillator is inhibited and the device is in a low power idle
mode On the low-to-high transition of TONE ENABLE data
is latched into the device and the selected tone pair from
the standard DTMF frequencies is generated An open-drain
N-channel transistor provides a MUTE output during tone
generation
Block Diagram
Crystal Specification Parallel Resonant 3 579545 MHz R
TL H 5004
S s
150X L
e
100 mH C
Features
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Direct microprocessor interface
Binary data inputs with latches
Generates 16 standard tone pairs
On-chip 3 579545 MHz crystal-controlled oscillator
Better than 0 64% frequency accuracy
High group pre-emphasis
Low harmonic distortion
MUTE output interfaces to speech network
Low power idle mode
3 5V – 8V operation
0
e
5 pF C
1
e
0 02 pF
RRD-B30M115 Printed in U S A
October 1991
TL H 5004 – 1

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tp5088 Summary of contents

Page 1

... TP5088 DTMF Generator for Binary Data General Description This CMOS device provides low cost tone-dialing capability in microprocessor-controlled telephone applications 4-bit binary data is decoded directly without the need for conver- sion to simulated keyboard inputs required by standard DTMF generators With the TONE ENABLE input low the ...

Page 2

Absolute Maximum Ratings If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Supply Voltage ( MUTE Voltage Maximum Voltage at Any Other Pin V 0 ...

Page 3

... OSC IN OSC OUT (Pins 6 and 7) All tone generation tim- ing is derived from the on-chip oscillator circuit A low-cost Dual-In-Line Package Top View Order Number TP5088WM or TP5088N See NS Package M14B or N14A 3 579545 MHz A-cut crystal (NTSC TV color-burst) is need- ed between pins 6 and 7 Load capacitors and a feedback ...

Page 4

Keyboard Data Inputs Equivalent ...

Page 5

... Physical Dimensions inches (millimeters) Order Number TP5088WM NS Package Number M14B 5 ...

Page 6

... National does not assume any responsibility for use of any circuitry described no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications Molded Dual-In-Line (N) Order Number TP5088N NS Package Number N14A 2 A critical component is any component of a life ...

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