pt7a8980 Pericom Technology Inc, pt7a8980 Datasheet
pt7a8980
Available stocks
Related parts for pt7a8980
pt7a8980 Summary of contents
Page 1
... PT0011(12/05) Description PT7A8980/8980L is designed to handle data in ST-BUS format. It interfaces with a microprocessor to switch PCM-encoded voice or data in application areas such as modern digital exchange, PBX and Central Office. PT7A8980/8980L can simultaneously connect up to 256 channels of 64 kbit/s each. It has 8 data stream inputs and 8 data stream outputs ...
Page 2
... Normal Mode .......................................................................................................................... 8 Message Mode ........................................................................................................................ 8 ST-BUS Output High Impedance ............................................................................................. 8 CSTo Output ........................................................................................................................... 8 Detailed Specifications ..................................................................................................................... 10 Absolute Maximum Ratings .................................................................................................. 10 Recommended Operating Conditions ...................................................................................... 10 DC Electrical, Power Supply and Capacitance Characteristics ................................................ 11 AC Electrical Characteristics ................................................................................................. 12 Mechanical Information ......................................................................................................... 17 Notes .............................................................................................................................................. 19 PT0011(12/05) PT7A8980/8980L Digital Switch Table of Contents 2 Data Sheet Page Ver:5 ...
Page 3
... Block Diagram Figure.1 Block Diagram Serial STi0-STi7 To Parallel Converter Control Register Microprocessor Interface DS CS R/W A0-A5 DTA D0-D7 PT0011(12/05) PT7A8980/8980L Digital Switch Output Data MUX Memory Connection Memory CSTo 3 Data Sheet ODE Parallel ...
Page 4
... Vcc 11 30 F0i 12 29 C4i R/W PT0011(12/05) PT7A8980/8980L Digital Switch ...
Page 5
... PT0011(12/05) PT7A8980/8980L Digital Switch ...
Page 6
... The microprocessor can read the data from any ST-BUS input channel or write the data to any ST-BUS output channel via the microprocessor interface . The microprocessor communicates with the PT7A8980/8980L in the same way as with its external memory. By writing to the PT7A8980/8980L, the microproces- sor can either establish switched connections between one ST- BUS input channel and one ST-BUS output channel or transmit specific messages to ST-BUS output channels ...
Page 7
... Data Sheet PT7A8980/8980L Digital Switch Data Stream Address Bits ...
Page 8
... Normal Mode The PT7A8980/8980L mainly has two modes of operation, Normal Mode and Message Mode. In Normal Operation Mode, data on the ST-BUS output comes from the ST-BUS input ...
Page 9
... Data Sheet PT7A8980/8980L Digital Switch ...
Page 10
... Data Sheet PT7A8980/8980L Digital Switch Note: Stresses greater than those listed under MAXI- MUM RATINGS may cause permanent damage to the device. This is a stress rating only and func- tional operation of the device at these or any other conditions above those indicated in the opera- tional sections of this specification is not implied ...
Page 11
... and V are not applicable Data Sheet PT7A8980/8980L Digital Switch ...
Page 12
... CH31, Bit CTT t FSS t FSW 12 Data Sheet PT7A8980/8980L Digital Switch ...
Page 13
... Bit Cell Boundary t SOH High Impedance t SAZ High Impedance t SZA t SOH t SAA t XCH t XCD 13 Data Sheet PT7A8980/8980L Digital Switch ...
Page 14
... F0i Bit Cells CH31, Bit 0 CSTo JXG Bit 1, CH0, STo7 JXG Bit 1, CH1, STo0 JXG Bit 1, CH1, STo1 JXG Bit 1, CH1, STo2 * CH – channel, JXG – Connection Memory High Location PT0011(12/05) PT7A8980/8980L Digital Switch t OED High Impedance Bit Cell Boundaries t SS ...
Page 15
... Data Sheet PT7A8980/8980L Digital Switch ...
Page 16
... Figure 14. Timing Diagram of Processor Bus CSS R/W t RWS ADS DTA PT0011(12/05) PT7A8980/8980L Digital Switch t AKD t AKH t RDS Data Sheet 2.2V 0.8V 2.2V 0.8V ...
Page 17
... PT0011(12/05) PT7A8980/8980L Digital Switch 17 ...
Page 18
... Figure 16. J/JE (44-Pin PLCC) PT0011(12/05) PT7A8980/8980L Digital Switch 18 Data Sheet ...
Page 19
... Pericom Technology does not assume any responsibility for use of any circuitry described other than the circuitry embodied in Pericom Technology product. The company makes no representations that circuitry described herein is free from patent infringement or other rights, of Pericom Technology Incorporation. PT0011(12/05) PT7A8980/8980L Digital Switch Notes Pericom Technology Inc. Web-Site: www.pti.com.cn, www.pti-ic.com ...