PEB 3081 H V1.4 Infineon Technologies, PEB 3081 H V1.4 Datasheet - Page 49

• Manufacturer Part Number: PEB 3081 H V1.4
• Description: IC S-BUS INTERFACE EXT MQFP44
• Manufacturer: Infineon Technologies

Specifications of PEB 3081 H V1.4

• Function: S / T Bus Interface Transceiver
• Interface: IOM-2, ISDN, SCI
• Number Of Circuits: 1
• Voltage - Supply: 3.3V
• Current - Supply: 30mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-QFP
• Includes: D-Channel Access Control, Monitor Channel Handler
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Other names: PEB3081HV1.4XT; PEB3081HV14XP; SP000007583; SP000007584

Between each receive line and the transformer a 10 k W resistor is used. This value is
split into two resistors: one between transformer and protection diodes for current limiting
during the 96 kHz test, and the second one between input pin and protection diodes to
limit the maximum input current of the chip.
With symmetrical receivers no difficulties regarding LCL measurements are observed;
compensation networks thus are obsolete.
In order to comply to the physical requirements of ITU-T recommendation I.430 and
considering the national requirements concerning overvoltage protection and
electromagnetic compatibility (EMC), the SBCX-X may need additional circuitry.
3.3.6.2
Synchronization problems can occur on a S-Bus that is not terminated properly.
Therefore, it is recommended to change the resistor values in the receive path. The sum
of both resistors is increased from 10 k W (1.8 + 8.2) to e.g. 34 k W (6.8 + 27) for either
receiver line. This change is possible but not necessary for a S-Bus that is terminated
properly.
Figure 26
Note: Lower or higher values than 34 k W may be used as well, however for values above
Data Sheet
34 k W the additional delay must be compensated by setting TR_CONF2.PDS=1
(compensates 260 ns) so the allowed input phase delay is not violated.
S-Transceiver Synchronization
Note: Capacitors (up to 10 pF) are optional for noise reduction.
SR2
SR1
External Circuitry for Symmetrical Receivers
GND
R1
R1
49
Description of Functional Blocks
R2
R2
V
DD
1:1
21150_33
S Bus
PEB 3081
2003-02-04
SBCX-X