MT91600

The MT91600 provides an interface between a switching system and a subscriber loop, mainly for short loop SLIC applications. The features of MT91600 are: (1)Transformerless 2 W to 4 W conversion; (2)Controls battery feed to line; (3)Programmable line impedance; (4)Programmable network balance impedance; (5)Off-hook and dial pulse detection; (6)Ring ground over-current protection; (7)Programmable gain; (8)Programmable constant current feed; (9)-22 V to -72 V battery operation.

The following is about the maximum ratings of MT91600: (1)DC Supply Voltages: -0.3 min and +6.5 max; (2)Ringing Voltages: 100 Vrms at Superimposed on VBAT; (3)Voltage setting for Loop Current: -20V min and +0.3V max at  VREF -20 +0.3 V ; (4)Overvoltage Tip/GND Ring/GND, Tip/Ring: 200 V at MAX 1 ms (with power on); (5)Ringing Current Iring: 30 mA. RMS; (6)Ring Ground over-current: 45 mA max; (7)Storage Temp: -65°C min and +150 °C max; (8)Package Power Dissipation: 0.10 W at +85°C max, VBAT = -48 V; (9)ESD Rating: 500 V at Human Body Model.

The following is about the electrical characteristics of MT91600: (1)Supply Current: 11mA; (2)Power Consumption: 60mW typical and 90 mW max at Standby/Active; (3)Constant Current Line Feed: 22 mA min, 25 mA typical and 28 mA max at VREF = -10.3 V, VBAT = -48 V; (4)Programmable Loop Current Range: 18 mA min and 32 mA max; (5)Operating Loop (inclusive of Telephone Set): 1200 min at ILOOP = 18 mA, VBAT = -48 V; (6)Off Hook Detection Threshold: 20mA at VREF = -10.3 V, VBAT = -48 V, ILOOP = 25 mA; (7)RLYC Input Low Voltage: 0.4 V typical and 0.7 V max.