IDT72V8981J IDT, Integrated Device Technology Inc, IDT72V8981J Datasheet
IDT72V8981J
Specifications of IDT72V8981J
Available stocks
Related parts for IDT72V8981J
IDT72V8981J Summary of contents
Page 1
FEATURES: • • • • • 128 x 128 channel non-blocking switch • • • • • Serial Telecom Bus Compatible (ST-BUS • • • • • inputs—32 channels at 64 Kbit/s per serial line • • • ...
Page 2
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 PIN CONFIGURATION NOTE: 1. DNC - Do Not Connect INDEX RX3 F0i 13 C4i ...
Page 3
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 PIN DESCRIPTIONS SYMBOL NAME I/O GND Ground DTA Data Acknowledgment O (Open Drain) RX0-3 RX Input F0i Frame Pulse I C4i Clock ...
Page 4
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 FUNCTIONAL DESCRIPTION (Cont'd) is split into two 8-bit blocks—Connection Memory HIGH and Connection Memory LOW. Each location in Connection Memory is associated with a particular channel in an output stream ...
Page 5
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 INITIALIZATION OF THE IDT72V8981 On initialization or power up, the contents of the Connection Memory High can be in any state. This is a potentially hazardous condition when multiple TX ...
Page 6
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 TABLE 3 — CONTROL REGISTER CONFIGURATION Bit Name 7 SM (Split Memory) When 1, all subsequent reads are from the Data Memory and writes are to the Connection Memory LOW, ...
Page 7
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 ABSOLUTE MAXIMUM RATINGS Symbol Parameter Vcc Symbol Voltage Vi Voltage on Digital Inputs GND - 0.3 V Voltage on Digital Outputs GND - 0 Current at Digital Outputs ...
Page 8
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS Symbol Characteristics (3) t Clock Period CLK t Clock Width High CH t Clock Width Low CL t Clock Transition Time CTT t Frame Pulse Setup Time ...
Page 9
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS Symbol Characteristics t TX0-3 Delay - Active to High Z TAZ t TX0-3 Delay - High Z to Active TZA t TX0-3 Delay - Active to Active ...
Page 10
IDT72V8981 3.3V Time Slot Interchange Digital Switch 128 x 128 AC ELECTRICAL CHARACTERISTICS Symbol Characteristics t Chip Select Setup Time CSS t Read/Write Setup Time RWS t Address Setup Time ADS t Acknowledgment Delay Fast AKD t Acknowledgment Delay Slow ...
Page 11
ORDERING INFORMATION IDT XXXXXX XX Device Type Package DATASHEET DOCUMENT HISTORY 05/23/2000 pgs and 11. 08/18/2000 pgs and 11. 01/24/2001 pgs. 1 and 7. 03/10/2003 pg. 1. 05/09/2003 pgs. 1- and 11. 08/20/2003 pg. ...