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IDT72V8988 Dataheets PDF



Part Number IDT72V8988
Manufacturers Integrated Device Technology
Logo Integrated Device Technology
Description 3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH
Datasheet IDT72V8988 DatasheetIDT72V8988 Datasheet (PDF)

www.DataSheet4U.com 3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128 FEATURES: • • • • • • • • • • • IDT72V8988 128 x 128 channel non-blocking switch Automatic signal identification (ST-BUS®, GCI) 4 RX inputs—32 channels at 64 Kbit/s per serial line 4 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 3.3V Power Supply Available in 44-pin Plastic Leaded Chip Carrier (PLCC), and 4.

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www.DataSheet4U.com 3.3 VOLT TIME SLOT INTERCHANGE DIGITAL SWITCH 128 x 128 FEATURES: • • • • • • • • • • • IDT72V8988 128 x 128 channel non-blocking switch Automatic signal identification (ST-BUS®, GCI) 4 RX inputs—32 channels at 64 Kbit/s per serial line 4 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 3.3V Power Supply Available in 44-pin Plastic Leaded Chip Carrier (PLCC), and 44-pin Plastic Quad Flatpack (PQFP) Operating Temperature Range -40°C to +85°C 3.3V I/O with 5V Tolerant Inputs per-channel variable or constant throughput delay modes and microprocessor read and write access to individual channels. As an important function of a digital switch is to maintain sequence integrity and minimize throughput delay, the IDT72V8988 is an ideal solution for most switching needs. FUNCTIONAL DESCRIPTION Frame sequence, constant throughput delay, and guaranteed minimum delay are high priority requirements in today’s integrated data and multimedia networks. The IDT72V8988 provides these functions on a per-channel basis using a standard microprocessor control interface. Each of the four 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, IDT72V8988 has incorporated an internal circuit to automatically identify the polarity and format of the frame synchronization. A functional block diagram of the IDT72V8988 device is shown on page 1. The serial streams operate continuously at 2.048 Mb/s and are arranged in 125µs wide frames each containing 32, 8-bit channels. Four input (RX0-3) and DESCRIPTION: The IDT72V8988 is an ST-BUS®/GCI compatible digital switch controlled by a microprocessor. The IDT72V8988 can handle as many as 128, 64 Kbit/s input and output channels. Those 128 channels are divided into 4 serial inputs and outputs, each of which consists of 32 channels. The IDT72V8988 provides FUNCTIONAL BLOCK DIAGRAM DataSheet4U.com DataShee C4i F0i VCC GND ODE Timing Unit RX0 RX1 RX2 RX3 Output MUX TX0 Receive Serial Data Streams Data Memory Control Register Connection Memory Transmit Serial Data Streams TX1 TX2 TX3 Microprocessor Interface 5704 drw01 DS CS R/W A0/ DTA D0/ A5 D7 DataSheet4U.com IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc. The ST-BUS is a trademark of Mitel Corp. AUGUST 2003 DSC-5704/5 1  2003 Integrated Device Technology, Inc. All rights reserved. Product specifications subject to change without notice. www.DataSheet4U.com IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 Commercial Temperature Range PIN CONFIGURATION DNC(1) DNC(1) DTA INDEX 6 5 4 3 2 44 43 42 41 RX3 VCC VCC VCC VCC VCC F0i C4i A0 A1 A2 1 40 DNC(1) RX2 RX1 RX0 ODE TX0 TX1 TX2 7 8 9 10 11 12 13 14 15 16 17 39 38 37 36 35 34 33 32 31 30 29 TX3 DNC(1) DNC(1) DNC(1) DNC(1) GND D0 D1 D2 D3 D4 18 19 20 21 22 23 24 25 26 27 A3 A4 A5 D7 D6 DNC(1) D5 DNC(1) DS R/W CS 28 5704 drw02 PLCC: 0.05in. pitch, 0.65in. x 0.65in (J44-1, order code: J) TOP VIEW et4U.com DataShee DataSheet4U.com DTA DNC(1) DNC(1) INDEX 44 43 42 41 40 39 38 37 36 35 RX3 VCC VCC VCC VCC VCC F0i C4i A0 A1 A2 34 DNC(1) ODE TX0 RX2 RX1 RX0 TX1 TX2 1 2 3 4 5 6 7 8 9 10 11 33 32 31 30 29 28 27 26 25 24 23 TX3 DNC(1) DNC(1) DNC(1) DNC(1) GND D0 D1 D2 D3 D4 12 13 14 15 16 17 18 19 20 21 22 5704 drw03 A3 A4 A5 CS D7 D6 DNC(1) D5 PQFP: 0.80mm pitch, 10mm x 10mm (DB44-1, order code: DB) TOP VIEW NOTES: DataSheet4U.com 1. DNC - Do Not Connect. 2 DNC(1) DS R/W www.DataSheet4U.com IDT72V8988 3.3V Time Slot Interchange Digital Switch 128 x 128 Commercial Temperature Range PIN DESCRIPTIONS SYMBOL GND VCC NAME Ground. VCC Data Acknowledgment (Open Drain) RX Input 0 to 3 Frame Pulse Clock Address 0 to 5 Data Strobe Read/Write Chip Select Data Bus 0 to 7 TX Outputs 0 to 3 (Three-state Outputs) Output Drive Enable I/O DESCRIPTION Ground Rail. +3.3 Volt Power Supply. This active LOW output indicates that a data bus transfer is complete. A pull-up resistor is required at this output. Serial data input streams. These streams have 32 channels at data rates of 2.048 Mb/s. This input accepts and automatically identifies frame synchronization signals formatted according to different backplane specifications such as ST-BUS® and GCI. 4.096 MHz serial clock for shifting data in and out of the data streams. These lines provide the address to IDT72V8988 internal registers. This is the input for the active HIGH data strobe on the microprocessor interface. This input operates with CS to enable the internal read and write generation. This input controls the direction of the data bus lines (D0-D7) during a.


DAC8555 IDT72V8988 IL485W


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