MT9080B

CMOS MT9080B SMX - Switch Matrix Module Features 16 bit wide data bus I/O 16 bit address bus Microprocessor Interface 2048 x 16 bit wide memory SRAM Interfaces with Mitel’s MT9085B to form larger switch mitoses Variable clock and frame rates DS5140 ISSUE 4 March 1999 Ordering Information MT9080BP 84 Pin PLCC -40°C to 70°C Description The MT9080B is a flexible memory module suitable for use as a basic building block in the construction of customized digital switching matrices. It can be configured as either a Data Memory or a Connection Memory, and is designed to interface with Mitel’s MT9085B. Interface to the device is via 16 bit wide data and address busses. The MT9080B can operate with variable clock rates up to 16.7 MHz. Applications Small and medium digital switch matrices Telephony equipment - PBX, CO equipment, digital cross connect, digital local loop Datacom equipment - access concentrators, Lan/Wan gateways D0i/D15i 16 16 2048 x 16 16 Address MUX 11 11 Bit Counter WR ENABLE PRECHARGE Static Memory 16 D0o/ D15o A0-A15 CRC CD Control Interface Counter Reset ME FP CK ODE DS CS R/W Mx My Mz DTA Figure 1 - Functional Block Diagram 2-101 MT9080B CMOS D15o D14o D13o D12o D11o D10o VDD VSS VSS VSS VSS D9o 76 10 84 82 80 D8i D9i D10i D11i VSS D12i D13i D14i D15i VSS CK VDD VSS IC IC FP CS DS R/W DTA NC 78 8 6 4 2 D8o D7i D6i D5i D4i D3i D2i D1i D0i 12 14 16 18 20 22 24 26 28 30 74 72 70 68 66 VSS D...