TP3076J National Semiconductor, TP3076J Datasheet

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TP3076J

Manufacturer Part Number
TP3076J
Description
COMBO II Programmable PCM CODEC/Filter for ISDN and Digital Phone Applications
Manufacturer
National Semiconductor
Datasheet
© 1999 National Semiconductor Corporation
TP3076
COMBO
and Digital Phone Applications
General Description
The TP3076 is a second-generation combined PCM CODEC
and Filter devices optimized for digital switching applications
on subscriber line and trunk cards and digital phone applica-
tions. Using advanced switched capacitor techniques,
COMBO II combines transmit bandpass and receive low-
pass channel filters with a companding PCM encoder and
decoder. The devices are A-law and µ-law selectable and
employ a conventional serial PCM interface capable of being
clocked up to 4.096 MHz. A number of programmable func-
tions may be controlled via a serial control port.
Channel gains are programmable over a 25.4 dB range in
each direction.
To enable COMBO II to interface to the SLIC control leads, a
number of programmable latches are included; each may be
configured as either an input or an output. The TP3076 pro-
vides 4 latches.
Block Diagram
TRI-STATE
MICROWIRE/PLUS
®
and COMBO
is a trademark of National Semiconductor Corporation.
®
®
are registered trademarks of National Semiconductor Corporation.
II Programmable PCM CODEC/Filter for ISDN
DS009758
FIGURE 1.
Features
n Complete CODEC and Filter system including:
n Programmable functions:
n Direct interface to solid-state SLICs
n Standard serial control interface
n 80 mW operating power (typ)
n 1.5 mW standby power (typ)
n Designed for CCITT and LSSGR specifications
n TTL and CMOS compatible digital interfaces
— Transmit and receive PCM channel filters
— µ-law or A-law companding coder and decoder
— Receive power amplifier drives 300
— 4.096 MHz serial PCM data (max)
— Transmit gain: 25.4 dB range, 0.1 dB steps
— Receive gain: 25.4 dB range, 0.1 dB steps
— Time-slot assignment; to 64 slots/frame
— 4 interface latches
— A or µ-law
— Analog loopback
— Digital loopback
Note: See also AN-614 COMBO II application guide.
DS009758-1
www.national.com
April 1994

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TP3076J Summary of contents

Page 1

... The TP3076 pro- vides 4 latches. Block Diagram TRI-STATE ® and COMBO ® are registered trademarks of National Semiconductor Corporation. MICROWIRE/PLUS ™ trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS009758 Features n Complete CODEC and Filter system including: — ...

Page 2

... Connection Diagram DS009758-4 Order Number TP3076J See NS Package Number J20A Pin Descriptions Pin Description ± V +5V 5% power supply. CC ± V −5V 5% power supply. BB GND Ground. All analog and digital signals are referenced to this pin. FS Transmit Frame Sync input. Normally a pulse X or squarewave with an 8 kHz repetition rate is ...

Page 3

Functional Description (Continued) The desired modes for all programmable functions may be initialized via the control port prior to a Power-up command. POWER-DOWN STATE Following a period of activity in the powered-up state the power-down state may be re-entered by ...

Page 4

Functional Description vices (COMBO); time-slots begin nominally coincident with the rising edge of the appropriate FS input. The alternative is to use Delayed Data mode, which is similar to shortframe sync timing on COMBO, in which each FS input must ...

Page 5

Programmable Functions Coding Law Selection Bits “MA” and “IA” in Table 2 permit the selection of µ255 coding or A-law coding, with or without even bit inversion. Analog Loopback Analog Loopback mode is entered by setting the “AL” and “DL” ...

Page 6

Programmable Functions TABLE 6. Time-Slot and Port Assignment Instruction Bit Number and Name (Note 6) (Note Assign One Binary Coded Time-Slot from 0–63 Assign ...

Page 7

Programmable Functions TABLE 8. Byte 2 of Receive Gain Instruction Bit Number 0 dBm0 Test Level (Vrms Output (Low Z to ...

Page 8

Applications Information www.national.com 8 ...

Page 9

... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications GND CC Voltage +0. Voltage at Any Digital Input V +0.5V to GND −0.5V CC Electrical Characteristics Unless otherwise noted, limits printed in BOLD characters are guaranteed for V +70˚ ...

Page 10

Electrical Characteristics Note 13: See definitions and timing conventions section. Timing Specifications Unless otherwise noted, limits printed in BOLD characters are guaranteed for V +70˚C by correlation with 100% electrical testing at T tests and/or product design and characterization. All ...

Page 11

Timing Specifications (Continued) Unless otherwise noted, limits printed in BOLD characters are guaranteed for V +70˚C by correlation with 100% electrical testing at T tests and/or product design and characterization. All signals referenced to GND. Typicals specified ...

Page 12

Timing Diagrams www.national.com FIGURE 3. Non-Delayed Data Timing Mode FIGURE 4. Delayed Data Timing Mode 12 DS009758-6 DS009758-7 ...

Page 13

Timing Diagrams (Continued) 13 www.national.com ...

Page 14

Transmission Characteristics Unless otherwise noted, limits printed in BOLD characters are guaranteed for V +70˚C by correlation with 100% electrical testing at T Transmit and receive gains programmed for maximum 0 dBm0 test levels (0 dB Gain). All other limits ...

Page 15

Transmission Characteristics Unless otherwise noted, limits printed in BOLD characters are guaranteed for V +70˚C by correlation with 100% electrical testing at T Transmit and receive gains programmed for maximum 0 dBm0 test levels (0 dB Gain). All other limits ...

Page 16

Transmission Characteristics Unless otherwise noted, limits printed in BOLD characters are guaranteed for V +70˚C by correlation with 100% electrical testing at T Transmit and receive gains programmed for maximum 0 dBm0 test levels (0 dB Gain). All other limits ...

Page 17

Transmission Characteristics Unless otherwise noted, limits printed in BOLD characters are guaranteed for V +70˚C by correlation with 100% electrical testing at T Transmit and receive gains programmed for maximum 0 dBm0 test levels (0 dB Gain). All other limits ...

Page 18

... 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. Ceramic Dual-In-Line Package (J) Order Number TP3076J NS Package Number J20A 2. A critical component is any component of a life support ...

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