3.3 VOLT TIME SLOT INTERCHANGE IDT72V8980 DIGITAL SWITCH 256 x 256 and output channels. Those 256 channels are divided into 8 serial inputs and FEATURES: outputs, each of which consists of 32 channels (64 Kbit/s per channel) to form 256 x 256 channel non-blocking switch a multiplexed 2.048 Mb/s stream. Serial Telecom Bus Compatible (ST-BUS ) 8 RX inputs32 channels at 64 Kbit/s per serial line FUNCTIONAL DESCRIPTION 8 TX output32 channels at 64 Kbit/s per serial line Three-state serial outputs A functional block diagram of the IDT72V8980 device is shown on below. Microprocessor Interface (8-bit data bus) The serial ST-BUS streams operate continuously at 2.048 Mb/s and are arranged in 125s wide frames each containing 32, 8-bit channels. Eight input 3.3V Power Supply (RX0-7) and eight output (TX0-7) serial streams are provided in the Available in 44-pin Plastic Leaded Chip Carrier (PLCC), 48-pin Small Shrink Outline Package (SSOP), and 44-pin Plastic Quad IDT72V8980 device allowing a complete 256 x 256 channel non-blocking Flatpack (PQFP) switch matrix to be constructed. The serial interface clock (C4i) for the device is 4.096 MHz. Operating Temperature Range -40C to +85C The received serial data is internally converted to a parallel format by the 3.3V I/O with 5V Tolerant Inputs on chip serial-to-parallel converters and stored sequentially in a 256-position Data Memory. By using an internal counter that is reset by the input 8 KHz frame DESCRIPTION: pulse, F0i, the incoming serial data streams can be framed and sequentially The IDT72V8980 is a ST-BUS compatible digital switch controlled by a addressed. microprocessor. The IDT72V8980 can handle as many as 256, 64 Kbit/s input FUNCTIONAL BLOCK DIAGRAM (1) C4i F0i VCC GND RESET ODE TX0 Timing RX0 Unit Output MUX TX1 RX1 TX2 RX2 Receive Transmit RX3 TX3 Data Serial Data Serial Data Memory Streams Streams RX4 TX4 RX5 Connection TX5 Control Register Memory RX6 TX6 RX7 Microprocessor Interface TX7 5705 drw01 CCO DS CS A0 R/W DTA D0/ A5/ D5 NOTE: 1. The RESET Input is only provided on the SSOP package. IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The ST-BUS is a trademark of Mitel Corp. AUGUST 2003 1 2003 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. DSC-5705/5IDT72V8980 3.3V Time Slot Interchange Commercial Temperature Range Digital Switch 256 x 256 PIN CONFIGURATION INDEX INDEX RX3 7 TX3 39 RX3 1 33 TX3 RX4 8 38 TX4 TX4 RX4 2 32 RX5 9 37 TX5 RX5 TX5 3 31 RX6 10 36 TX6 RX6 4 30 TX6 RX7 11 35 TX7 RX7 5 29 TX7 VCC 34 12 GND VCC 6 28 GND F0i 13 33 D0 F0i 7 27 D0 C4i 14 32 D1 8 26 D1 C4i A0 15 31 D2 A0 25 9 D2 16 30 A1 D3 A1 10 24 D3 A2 17 29 D4 A2 11 23 D4 5705 drw02 5705 drw03 PLCC: 0.05in. pitch, 0.65in. x 0.65in. PQFP: 0.80mm pitch, 10mm x 10mm (J44-1, order code: J) (DB44-1, order code: DB) TOP VIEW TOP VIEW GND 1 48 CCO DTA 2 47 ODE RX0 TX0 3 46 RX1 45 TX1 4 RX2 5 44 TX2 (1) (1) DNC DNC 6 43 RX3 42 TX3 7 RX4 41 TX4 8 RX5 TX5 9 40 RX6 10 39 TX6 RX7 11 38 TX7 VCC 12 GND 37 (2) VCC RESET 13 36 D0 F0i 14 35 D1 C4i 15 34 A0 16 33 D2 A1 17 32 D3 31 A2 18 D4 (1) (1) 30 DNC 19 DNC A3 20 29 D5 A4 21 28 D6 A5 22 27 D7 DS 23 26 CS 25 GND R/W 2 4 5705 drw04 TOP VIEW Package Type Reference Identifier Order Code SSOP: 0.025in. pitch, 0.625in. x 0.295in. SO48-1 PV NOTES: 1. DNC - Do Not Connect 2. The RESET Input is only provided on the SSOP package. 2 6 DNC(1) (1) DNC 18 5 RX2 A3 19 4 RX1 A4 20 3 RX0 A5 21 2 DTA 22 DS 1 CCO 23 R/W 44 ODE CS 24 43 TX0 25 D7 42 TX1 26 D6 41 TX2 D5 27 40 DNC(1) (1) 28 DNC (1) DNC 12 44 DNC(1) A3 13 43 RX2 14 42 RX1 A4 15 41 RX0 A5 16 40 DTA DS 17 39 R/W CCO 18 38 CS ODE 19 37 TX0 D7 D6 20 36 TX1 TX2 21 35 D5 (1) DNC 22 34 DNC(1)