IDT72V8980 Integrated Device Technology, IDT72V8980 Datasheet
IDT72V8980
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IDT72V8980 Summary of contents
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... I/O with 5V Tolerant Inputs DESCRIPTION: ® The IDT72V8980 is a ST-BUS compatible digital switch controlled by a microprocessor. The IDT72V8980 can handle as many as 256, 64 Kbit/s input FUNCTIONAL BLOCK DIAGRAM RX0 RX1 RX2 Receive Data ...
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... IDT72V8980 3.3V Time Slot Interchange Digital Switch 256 x 256 PIN CONFIGURATION INDEX RX3 7 RX4 8 RX5 9 RX6 10 RX7 F0i 13 C4i PLCC: 0.05in. pitch, 0.65in. x 0.65in. (J44-1, order code: J) TOP VIEW SSOP: 0.025in. pitch, 0.625in. x 0.295in. NOTES: 1 ...
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... This output is a 2.048 Mb/s line which contains 256 bits per frame. The level of each bit is controlled by the contents of the CCO bit in the Connection Memory HIGH locations. This input (active LOW) puts the IDT72V8980 in its reset state that clears the device internal counters, registers and brings TX0-7 and microport data outputs to a high-impedance state. The time constant for a power up reset circuit must be a minimum of five times the rise time of the power supply ...
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... Processor Mode; i.e., the contents of the Connect Memory LOW (CML, see Table 5) are output on the TX output streams once every frame unless the ODE input pin is LOW bit is HIGH, then the IDT72V8980 behaves as if bits 2 (Channel Source) and 0 (Output Enable) of every Connect Memory High (CMH) locations were set to HIGH, regardless of the actual value ...
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... IDT72V8980 3.3V Time Slot Interchange Digital Switch 256 x 256 If the ODE input pin is LOW, then all the serial outputs are high-impedance. If ODE is HIGH, then bit 0 (Output Enable) of the CMH location enables (if HIGH) or disables (if LOW) the output stream and channel. The contents of bit 1 (CCO) of each Connection Memory High Location (see Table 4) is output on CCO pin once every frame ...
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... IDT72V8980 3.3V Time Slot Interchange Digital Switch 256 x 256 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, except when the Control Register is accessed again. When 0, the Memory Select bits specify the memory for the operations ...
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... IDT72V8980 3.3V Time Slot Interchange Digital Switch 256 x 256 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 O T Storage Temperature S P Package Power Dissapation D NOTE: 1. Stresses greater than those listed under ABSOLUTE MAXIMUM RATINGS may cause permanent damage to the device ...
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... IDT72V8980 3.3V Time Slot Interchange Digital Switch 256 x 256 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 FPS t Frame Pulse Hold Time FPH t Frame Pulse Width ...
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... IDT72V8980 3.3V Time Slot Interchange Digital Switch 256 x 256 AC ELECTRICAL CHARACTERISTICS Symbol Characteristics t TX0-7 Delay - Active to High Z TAZ t TX0-7 Delay - High Z to Active TZA t TX0-7 Delay - Active to Active TAA t TX0-7 Hold Time TOH t Output Driver Enable Delay OED t External Control Hold Time ...
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... IDT72V8980 3.3V Time Slot Interchange Digital Switch 256 x 256 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 AKD t Fast Write Data Setup Time FWS t Slow Write Data Delay ...
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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 and 11. 08/20/2003 pg. 7. ...