TP11362AV National Semiconductor, TP11362AV Datasheet

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TP11362AV

Manufacturer Part Number
TP11362AV
Description
Quad Adaptive Differential PCM Processor
Manufacturer
National Semiconductor
Datasheet

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© 1997 National Semiconductor Corporation
TP11362A
Quad Adaptive Differential PCM Processor
General Description
The TP11362A is a quad (4) channel Adaptive Differential
Pulse Code Modulation (ADPCM) transcoder, fully compat-
ible to ITU G.726 recommendation in 40 kbps, 32 kbps,
24 kbps, 16 kbps and ANSI 32 kbps modes. The TP11362A
ADPCM processor can operate on up to 8 independent
channels in an 8 kHz frame. Each channel is individually
configured, supporting both full and half duplex operation. All
input/output transfers occur on an interrupt basis using se-
rial, double buffered data registers. Together with National’s
TP3054/57 COMBO
TP11362A forms complete ADPCM channels with Codec/
filtering.
Block Diagram
TRI-STATE
®
and COMBO
®
are registered trademarks of National Semiconductor Corporation.
®
or TP3070/71 COMBO II devices, the
DS012877
FIGURE 1. Block Diagram
Features
n CCITT G.726 compatible at 40, 32, 24, 16 kbps
n ANSI T1.301 compatible at 32 kbps
n 8-channel half-duplex (encode or decode) or 4-channel
n Each channel individually configurable
n Selectable µ-law or A-law PCM coding
n Asynchronous 8 MHz master clock operation
n TTL and CMOS compatible inputs and outputs
n 28-pin PLCC or 24-pin DIP packages
n Power consumption of typ. 6 mW at +5V per full-duplex
n On-Chip Power-On-Reset
n −40˚C to +85˚C operating temperature range
n Single 5V supply
full-duplex operation in 8 kHz frame
channel
www.national.com
March 1997
DS012877-1

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TP11362AV Summary of contents

Page 1

... TP11362A forms complete ADPCM channels with Codec/ filtering. Block Diagram TRI-STATE ® and COMBO ® are registered trademarks of National Semiconductor Corporation. © 1997 National Semiconductor Corporation DS012877 Features n CCITT G.726 compatible at 40, 32, 24, 16 kbps n ANSI T1.301 compatible at 32 kbps n 8-channel half-duplex (encode or decode) or 4-channel ...

Page 2

... Connection Diagrams Plastic Chip Carriers Top View Order Number TP11362AV See NS Package Number V28A Pin Descriptions TSI Transmit PCM serial data input. TSI is an 8-bit PCM data stream and is shifted into an 8-bit serial-to-parallel register on the falling edges of PSCK while CE and TRB are high. ...

Page 3

Pin Descriptions (Continued) QSEL0, QSEL1 ADPCM bit rate select inputs. The QSEL0 and QSE1 signals are strobed in with the falling edge of CE. The QSEL0 and QSEL1 select the conversion bit rate of the PCM data just clocked in ...

Page 4

Functional Description The TP11362A is capable of processing eight independent channels (half duplex) or four full-duplex PCM channels within 125 µs (8 kHz). The logic state of TRB at the falling edge of CE determines which input register is active ...

Page 5

Functional Description (Continued receive (decoder) operation. For the encoding opera- tion, the PCM data is stored in the 8-bit shift register at the falling edge of CE while TRB is high. The TP11362A pro- cesses the data within ...

Page 6

Functional Description www.national.com (Continued) 6 ...

Page 7

Functional Description (Continued) Table 3 shows the position of the ADPCM data in the 5-bit in- put register when five ASCK low going pulses are available while CE is high. Only the last four bits of the ADPCM input register ...

Page 8

Functional Description to the falling edge of CE are latched in. In Table 3 , the last in- put bit prior to to the CE falling edge is the LSB of the AD- PCM data word. Note that the serial ...

Page 9

Functional Description (Continued) G.726. At power up, the outputs TSO and RSO are in TRI-STATE mode. This “cold” reset process is asynchronous and takes approximately 2000 CLK cycles for the initializa- tion. During the reset process, the outputs TSO and ...

Page 10

... Absolute Maximum Ratings TGT: FNXref NS0465*) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications GND CC Voltage at Any Digital Inputs or Outputs GND − 0. Electrical Characteristics Unless otherwise noted, limits printed in bold characters are guaranteed forV − ...

Page 11

Timing Specifications (Continued) Unless otherwise noted, limits printed in bold characters are guaranteed for V −40˚C to +85˚C by correlation with 100% electrical testing at T production tests and/or product design and characterization. Typical values are specified at V Symbol ...

Page 12

Timing Specifications (Continued) www.national.com 12 ...

Page 13

Applications Information FIGURE 7. Typical Application in an ISDN Pair Gain System 13 DS012877-9 www.national.com ...

Page 14

Applications Information Note 6: The duty cycle of CE can be adjusted to adapt to different PCM data bit clocks of the COMBO. Note 7: The DX data output is shown with the long frame sync mode (non-delayed data timing ...

Page 15

Physical Dimensions inches (millimeters) unless otherwise noted 24-Lead (0.600" Wide) Molded Dual-In-Line Package Order Number TP11362AN NS Package Number N24A 15 www.national.com ...

Page 16

... Italiano 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. Order Number TP11362AV NS Package Number V28A 2. A critical component in any component of a life support ...

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