tp3076 National Semiconductor Corporation, tp3076 Datasheet

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tp3076

Manufacturer Part Number
tp3076
Description
Combo Ii Programmable Pcm Codec/filter For Isdn And Digital Phone Applications
Manufacturer
National Semiconductor Corporation
Datasheet

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© 2004 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 appli-
cations. 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
provides 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
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 300Ω
— 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.
00975801
February 2003
www.national.com

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tp3076 Summary of contents

Page 1

... 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 provides 4 latches. Block Diagram TRI-STATE ® ...

Page 2

... Table 1 CO Control Data Output pin. Serial control or status information is shifted out of COMBO II on this pin when CS is low. www.national.com 00975804 Order Number TP3076N-G See NS Package Number N20A Description and D R ® output remains in the high impedance state except during the 1 output pulls low to enable a backplane line-driver ...

Page 3

Pin Descriptions (Continued) Pin CS Chip Select input. When this pin is low, control information can be written to or read from COMBO II via CI or CO. IL3–IL0 Each Interface Latch I/O pin may be individually programmed as an ...

Page 4

Functional Description TABLE 1. Programmable Register Instructions (Continued) Function Write Transmit Gain Register Read Transmit Gain Register Write Receive Time-Slot/Port Read-Back Receive Time-Slot/Port Write Transmit Time-Slot/Port Read-Back Transmit Time-Slot/Port Note 1: Bit 7 of bytes 1 and 2 is always ...

Page 5

... Each IL pin may be individually pro- grammed as a logic input or output by writing the appropriate instruction to the LDR, see Table 1 and Table 3. For mini- mum power dissipation, unconnected latch pins should be programmed as outputs. For the TP3076, bits 2 and 3 should Even Bit always be programmed as “1” (outputs). Inversion Bits L – ...

Page 6

... Assign One Binary Coded Time-Slot from 0–63 Note 6: The “PS” bit MUST be set to “1” for both transmit and receive for the TP3076. Note the MSB of the time-slot assignment bit field. Time-slot bits should be set to “000000” for both transmit and receive when operating in non-delayed data timing mode ...

Page 7

... HPC16400 MICROWIRE/PLUS POWER SUPPLIES While the pins of the TP3076 COMBO II device are well protected against electrical misuse recommended that the standard CMOS practice of applying GND to the device before any other connections are made should always be followed ...

Page 8

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 Voltage at Any Digital Input V CC Electrical ...

Page 10

Electrical Characteristics Note 12: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. Note 13: See definitions and timing ...

Page 11

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 signals referenced to GND. Typicals specified ...

Page 12

Timing Diagrams www.national.com FIGURE 2. Non-Delayed Data Timing Mode FIGURE 3. Delayed Data Timing Mode 12 00975806 00975807 ...

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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

... English www.national.com Français Tel: +33 ( 8790 Molded Dual-In-Line Package (N) Order Number TP3076N-G NS Package Number N20A 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system affect its safety or effectiveness ...

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