peb4264 Infineon Technologies Corporation, peb4264 Datasheet - Page 17

• Manufacturer Part Number: peb4264
• Description: Peb4264 Subscriber Line Interface Circuit Standard Feature Set
• Manufacturer: Infineon Technologies Corporation

SLIC-S / TSLIC-S
PEF 4264 / PEF 4364
Functional Description
High Impedance (HIR, HIT, HIRT)
In these modes each of the line outputs can be programmed to show high impedance. HIT switches off the TIP
buffer, while HIR switches off the RING buffer. The current through the active buffer is still sensed. In the HIRT
mode both buffers show high impedance. The current sensor remains active thus allowing sensor offset calibration
(for test purposes).
2.2
Current Limitation / Overtemperature Protection
In any operating mode the total current delivered by the output drivers is limited to typically 85 mA.
If, however, the junction temperature exceeds 165 °C, the current limit is further reduced to keep the junction
temperature constant.
I
Simultaneously, pin C1 sinks a signalling current
.
therm
Preliminary Data Sheet
17
Revision 2.0, 2006-10-10