PSB21381

Features:

• 8-bit parallel microcontroller interface (only PSB 21382/4 in P-MQFP-64 package), Motorola, Siemens/Intel bus type
  multiplexed or non-multiplexed, direct-/indirect register addressing
• Serial control interface (SCI)
• IOM-2 interface in TE mode, single/double clock, two serial data strobe signals
• Various possibilities of microcontroller data access, data control and data manipulation to all IOM-2 timeslots
• Power supply 3.3V or 5V
• Monitor channel handler (master/slave)
• Sophisticated power management for restricted power mode
• Programmable microcontroller clock output and reset (input/output) pins
• Advanced CMOS technology

Transceiver part
• Full duplex 2B+D S/T interface transceiver according to ITU-T I.430
• Conversion of the frame structure between the S/T interface and IOM-2
• Receive timing recovery
• Continuously adapted receive thresholds
• D-channel access control
• Access to S and Q bits of S/T interface
• Activation and deactivation procedures with automatic activation from power down state
• HDLC controller. Operating in non-auto mode, transparent mode 0-2 or extended transparent mode. Access
   to B1, B2 or D channels or the combination of them e.g. for 144 kbit/s data transmission (2B+D)
• FIFO buffer with 64 bytes per direction and programmable FIFO thresholds for efficient transfer of data packets
• Implementation of IOM-2 MONITOR and C/I-channel protocol to control peripheral devices
• Realization of layer-1 statemachine in software possible
• Watchdog timer
• Programmable reset sources
• Test loops and functions

Codec part
• Applications in digital terminal equipment featuring voice functions
• Digital signal processing performs all CODEC functions
• Fully compatible with the ITU-T G.712 and ETSI (NET33) specification
• PCM A-Law/µ-Law (ITU-T G.711) and 8/16-bit linear data; maskable codec data
• Flexible configuration of all internal functions
• Three analog inputs for the handset microphone, the speakerphone and the headset
• Two differential outputs for a handset earpiece (200 Ω) and a loudspeaker (50 Ω for 5V power supply, 25 Ω for
   3.3V power supply)
• Flexible test and maintenance loopbacks in the analog front end and the digital signal processor
• Independent gain programmable amplifiers for all analog inputs and outputs
• Full digital speakerphone (SCOUT-SX only) and loudhearing support without any external
   component  (speakerphone  test and optimization function is available)
• Enhanced voice data manipulation for features like:
  - Three-party conferencing
  - Voice monitoring
• Two transducer correction filters
• Side tone gain adjustment
• Flexible DTMF, tone and ringing generator
• Direct and indirect CRAM access



Pinout




Specifications

Parameter	Symbol	Limit Values		Units
		min.	max.
Storage temperature	Tstg	65	150
Input/output voltage on any pin with respect to ground	VS	0.3	VDD + 0.3	V
Maximum voltage on any pin with respect to ground	Vmax		7	V

Note: Stresses above those listed here may cause permanent damage to the device.
          Exposure to absolute maximum rating conditions for extended periods may affect
         device reliability.

        Maximum ratings are absolute ratings; exceeding only one of these values may
       cause irreversible damage to the integrated circuit.


Description

The SCOUT-S or SCOUT-SX PSB21381 respectively integrates all necessary functions for the completion of a cost effective ISDN voice terminal solution.

Please note: Throughout the whole document "SCOUT™" refers to "SCOUT™-S" and "SCOUT™-SX"

The SCOUT PSB21381 combines the functionality of the ARCOFI®-BA PSB 2161 (Audio Ringing Codec Filter Basic Function) or ARCOFI®-SP PSB 2163 (Audio Ringing Codec Filter with Speakerphone) respectively and the ISAC®-S TE PSB 2186 (ISDN Subscriber Access Controller for Terminals) on a single chip.

The SCOUT-S PSB21381 is suited for the use in basic ISDN voice terminals just as it is, and in combination with an additional device on the modular IOM®-2 interface, in high end featurephones e.g. with acoustic echo cancellation.

The SCOUT-SX PSB21381 is an extended SCOUT-S PSB 21381 which provides the speakerphone performance of the ARCOFI-SP PSB 2163.

The transceiver implements the subscriber access functions for an ISDN terminal to be connected to a four wire S/T interface. PSB21381 covers complete layer-1 and basic layer-2 functions for digital terminals.

About PSB21381,The codec performs encoding, decoding, filtering functions and tone generation (ringing, audible feedback tones and DTMF signal). An analog front end offers three analog inputs and two analog outputs with programmable amplifiers.

The IOM-2 interface allows a modular design with functional extensions (e.g. acoustic echo cancellation, tip/ring extension, modem extension, answering machine, video or data terminal) by connecting other voice/data devices to the SCOUT PSB21381.

In the P-MQFP-44 package (PSB21381/3) only a serial microcontroller interface (SCI) is supported.

In the P-MQFP-64 package (PSB21381/4) a serial and parallel microcontroller interface are supported. A clock signal and a reset input and output pin complete the microcontroller interface.

The SCOUT PSB21381 is a CMOS device and operates with a 3.3 V or 5 V supply.