MT91600

www.DataSheet4U.com MT91600 Programmable SLIC Preliminary Information Features Transformerless 2W to 4W conversion Controls battery feed to line Programmable line impedance Programmable network balance impedance Off-hook and dial pulse detection Ring ground over-current protection Programmable gain Programmable constant current feed -22V to -72V battery operation DS5057 ISSUE 7 August 1999 Package Information MT91600 28 Pin SSOP Package -40°C to +85°C Description The Mitel MT91600 provides an interface between a switching system and a subscriber loop, mainly for short loop SLIC applications. The functions provided by the MT91600 include battery feed, programmable constant current, 2W to 4W conversion, off-hook and dial pulse detection, user definable line and network balance impedance’s and the capability of programming the audio gain externally. The device is fabricated as a CMOS circuit in a 28 pin SSOP package. Applications Line interface for: PABX/ONS Intercoms Key Telephone Systems Control Systems X3 X2 X1 TD Tip Drive Controller Audio Gain & Network Balance Circuit VX VR TF TIP RING RF C3A C3B RV RD Over-Current Protection Circuit Relay Driver Ring Drive Controller Loop Supervision Line Sense 2 W to 4 W Conversion & Line Impedance Z3 Z2 Z1 RLYC RLYD IC VREF SHK C1 C2A C2B VDD GND VEE Figure 1 - Functional Block Diagram 1 MT91600 VDD TD TF TIP RING VREF IC RF RV RD C3A C3B C2B C2A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25...