PEB 20571 F V3.1 Infineon Technologies, PEB 20571 F V3.1 Datasheet - Page 303

• Manufacturer Part Number: PEB 20571 F V3.1
• Description: IC LINE CARD CTRLR DSP TQFP-100
• Manufacturer: Infineon Technologies

Specifications of PEB 20571 F V3.1

• Function: PBX Controller with DSP
• Interface: ISDN
• Voltage - Supply: 3.13 V ~ 3.47 V
• Current - Supply: 272.6mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-LFQFP
• Includes: Layer-1 Control, Signaling Control, Signal Processing, Voice Channel Handling
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power (watts): -
• Number Of Circuits: -
• Other names: PEB20571FV3.1X; PEB20571FV31XP; SP000007539

9.3
When applying the PCM outputs in a bus configuration with pull-ups to 5 V the output
drivers of the DELIC have an irregular behavior.
As can be seen from the illustration below, the PCM output drivers TXDn (n=0..3)
continue to drive ’High’ level even outside the time slot enabled by TSC. This error
occurs only if the last bit in the time slot is a ’1’. In this case no problem occurs if another
PCM port drives a ’0’ in the neighbor time slot. In other words this means that the output
driver drives 3.3 V for a certain time against the 5 V pull-up. As soon as a neighbor time
slot is driven to ’0’ by another port the DELIC stops driving immediately.
As the occurring current is no problem for the DELIC, this behavior is uncritical.
Figure 96
Figure 97
Data Sheet
TSC
TXD
TSC
TXD
PCM Output Driver Anomaly
Behavior of Output Driver if Last Bit is ’1’
Behavior of Output Driver if Last Bit is ’0’
286
Application Hints
5 V
3.3 V
0 V
5 V
3.3 V
0 V
0 V
3.3 V
0 V
3.3 V
PEB 20570
PEB 20571
2003-07-31