PSB 2132 H V2.2 Infineon Technologies, PSB 2132 H V2.2 Datasheet - Page 19

• Manufacturer Part Number: PSB 2132 H V2.2
• Description: IC CODEC FILTER 2CHAN MQFP-64
• Manufacturer: Infineon Technologies
• Series: SICOFI®r

Specifications of PSB 2132 H V2.2

• Package / Case: 64-QFP
• Function: CODEC Filter
• Interface: IOM-2 PCM, SPI
• Number Of Circuits: 2
• Voltage - Supply: 5V
• Current - Supply: 18mA
• Power (watts): 90mW
• Mounting Type: Surface Mount
• Includes: Level Metering Function, Tone Generation
• Number Of Adc Inputs: 2
• Number Of Dac Outputs: 2
• Interface Type: Serial
• Operating Supply Voltage: 5 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Number Of Channels: 2
• Snr: 35.4 dB
• Supply Current: 40 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: PSB2132HV2.2XT; SP000007696

3
The SICOFI
provides four analog telephone lines. The SLIC can be either a transformer or an
electronic circuit with operational amplifiers. It must have a defined input impedance
towards the analog line for maximum power transfer and return loss. Also, the signal
reflections that are generated by the hybrid inside the SLIC must be eliminated. Along
with its other features, the SICOFI
transhybrid balancing to perform these tasks.
3.1
The impedance matching and transhybrid balancing functions are performed by loop
filters between the transmit path (analog to PCM) and the receive path (PCM to analog).
The filter characteristics must be adjusted according to the local requirements of each
market. In the analog domain, filters must be optimized in hardware; this is generally
both tedious and time-consuming. This is not the case with the DSP-based SICOFI
TE two-channel codec. Its integrated signal processor implements the impedance
matching and transhybrid balancing functions as digital, programmable filters. It also
performs frequency response corrections and level adjustments to enable the design of
a truly universal and internationally applicable telephone interface. Transmission
characteristics and frequency behavior are enhanced by the accuracy of the digital
filters, which do not fluctuate over temperature or with age.
As an additional benefit of its DSP-based architecture, the PSB 2132 also provides two
tone generators per channel. An on-chip level-metering unit allows line-characterization
without extra hardware; it can also be used to detect specific tones, e.g., modem tones.
3.2
A very simple Microcontroller Interface is used to program the SICOFI
The same port provides access to 14 general purpose I/O pins of the Signaling Interface.
This allows efficient and convenient monitoring and control of other tip/ring functions,
such as on-/off-hook detection, ground-key detection, switching of ring signals and test
relays. The Serial Microcontroller Interface provides a programming and control
interface and is generic and non-proprietary for use with any microcontroller. It can be
implemented with as few as three signal lines, since the data receive and data transmit
pins may be strapped together.
Hardware Reference Manual
Functional Description
DSP-based Architecture
Programming and Control
®
2-TE in combination with four Subscriber Line Interface Circuits (SLIC)
®
2-TE has built-in impedance matching and
10
Functional Description
®
2-TE functions.
PSB 2132
2001-02-20
®
2-