Pinout
DescriptionThe MT8952BE is a kind of HDLC protocol controller. The HDLC Protocol Controller frames and formats data packets according to X.25 (Level 2) Recommendations from the CCITT. The typical applications of MT8952BE include: (1)data link controllers and protocol generators; (2)digital sets, PBXs and private packet networks; (3)D-channel controller for ISDN basic access; (4)C-channel controller to Digital Network; (5)interface circuits (typically MT8972); (6)interprocessor communication. The device is available in 28 pin plastic DIP package.
There are some features of MT8952BE as follows: (1)formats data as per X.25 (CCITT) level-2 standards; (2)go-ahead sequence generation and detection; (3)single byte address recognition; (4)microprocessor port and directly accessible registers for flexible operation and control; (5)19 byte FIFO in both send and receive paths; (6)handshake signals for multiplexing data links; (7)high speed serially clocked output (2.5 Mbps); (8)ST-BUS compatibility with programmable; (9)channel selection for data and separate; (10)timeslot for control information; (11)independent watchdog timer; (12)facility to disable protocol functions; (13)low power ISO-CMOS technology.
The following is about the absolute maximum ratings of MT8952BE: (1)supply voltage, VDD: -0.3 to 7.0 V; (2)voltage on any pin (other than supply pins), VI: VSS-0.3 to VDD+0.3 V; (3)Current on any pin (other than supply pins), II/IO: ±25 mA; (4)DC supply or ground current, IDD/ISS: ±50 mA; (5)storage temperature, TST: -65 to 150; (6)package power dissipation Plastic, PD: 0.6 W. 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 max for a noise margin of 400 mV; (3)input LOW voltage, VIL: VSS V min and 0.4 V max for a noise margin of 400 mV; (4)frequency of operation, fCL: 5.0 MHz max when clock input is at twice the bit rate.; (5)operating temperature, TA: -40 min, 25 typ and 85 max.
MT8952BE Data Sheet
