IDT728985

www.DataSheet4U.com TIME SLOT INTERCHANGE DIGITAL SWITCH 256 x 256 .EATURES: IDT728985 256 x 256 channel non-blocking switch Automatic signal identification (ST-BUS®, GCI) 8 RX inputs — 32 channels at 64 Kbit/s per serial line 8 TX outputs — 32 channels at 64 Kbit/s per serial line Three-state serial outputs Microprocessor Interface (8-bit data bus) Frame Integrity for data applications 5V Power Supply Operating Temperature Range -40°C to +85°C Available in 44-pin Plastic Leaded Chip Carrier (PLCC), 44-pin Plastic Quad Flatpack (PQFP) and 40-pin Plastic Dip (P-DIP) and write access to individual channels. As an important function of a digital switch is to maintain sequence integrity and minimize throughput delay, the IDT728985 is an ideal solution for most switching needs. .UNCTIONAL DESCRIPTION Frame sequence, constant throughput delay, and guaranteed minimum delay are high priority requirements in today’s integrated data and multimedia networks. The IDT728985 provides these functions on a per-channel basis using a standard microprocessor control interface. Each of the eight serial lines is designed to switch 64 Kbit/s PCM or N x 64 Kbit/s data. In Processor Mode, the microprocessor can access the input and output time slots to control other devices such as ISDN transceivers and trunk interfaces. Supporting both GCI and ST-BUS® formats, IDT728985 has incorporated an internal circuit to automatically identify the polarity and format of the frame synch...