MT8931CE

The MT8931CE is a kind of Subscriber Network Interface Circuit (SNIC) which implements the ETSI ETS 300-012, CCITT I.430 and ANSI T1.605 Recommendations for the ISDN S and T reference points. The MT8931CE provides point-topoint and point-to-multipoint digital transmission, which makes it may be used at either end of the subscriber line (NT or TE). In addition, the device includes a HDLC D-channel protocoller which is controlled through a Motorola/Intel microprocessor port. The device is available in 28 pin plastic DIP package. The MT8931CE is widely used in ISDN NT1, ISDN S or T interface, ISDN Terminal Adaptor (TA), digital sets (TE1)-4 wire ISDN interface, digital PABXs and digital line cards (NT2).

There are some features of MT8931CE as follows: (1)ETS 300-012, CCITT I.430 and ANSI T1.605 S/T interface; (2)full-duplex 2B+D, 192 kbit/s transmission; (3)link activation/deactivation; (4)D-channel access contention resolution; (5)point-to-point, point-to-multipoint and star configurations; (6)master (NT)/slave (TE) modes of operation; (7)exceeds loop length requirements; (8)complete loopback testing capabilities; (9)on chip HDLC D-channel protocoller; (10)8 bit Motorola/Intel microprocessor interface; (11)microprocessor-controlled operation; (12)zarlink ST-BUS interface; (13)low power CMOS technology; (14)single 5 volt power supply.

What comes next is about the absolute maximum ratings of MT8931CE: (1)supply voltage, VDD: -0.3 to 7.0 V; (2)voltage on any I/O pin, VI/O: -0.3 to VDD+0.3 V; (3)current on any I/O pin, II/O: 20 mA; (4)storage temperature, TST: -65 to 150; (5)package power dissipation, PD: 1000 mW. Then is about the recommended operating conditions (voltages are with respect to ground (VSS) unless otherwise stated): (1)supply voltage, VDD: 4.75 V min, 5.0 V typ and 5.25 V max; (2)input high voltage, VIH: 2.4 V min and VDD V for 400 mV noise margin; (3)input low voltage, VIL 0 V min and 0.4 V max for 400mV noise margin; (4)load resistance (LTx), RL: 250 typ With reference to VBias; (5)load capacitance (LTx), CL: 32 pF max with reference to VBias; (6)operating temperature, TOP: -40 to 85.