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Part: SA3488
Category:
Communication
-> Telephony
Description: CMOS 256 X 256 Digital Switching Matrix
Company: South African Micro-Electronic Systems
Datasheet: Download SA3488 datasheet File size : 70 kB
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Datasheet text preview:
SA3488
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FEATURES
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SA3488
CMOS 256 X 256 DIGITAL SWITCHING MATRIX
Hardware (pin-to-pin) and software compatible with M088 and M3488 256 input and 256 output channel digital switching matrix B u i l d i n g block designed for large capacity electronic exchanges, subsystems and PABX Non-blocking single stage and higher capacity blocks (512 or 1024 channels) E u r o p e a n and U.S. standard compatible (32/24 serial channels per frame) P C M inputs and outputs mutually compatible
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Actual input-output channel connections stored and modified via an on chip 8-bit parallel microprocessor interface 6 main "Functions" or "Instructions" available Typical Bit Rate : 2Mbit/s Typical Synchronization Rate : 8KHz (time frame is 125µs) 5 V power supply with internally generated bias voltage M O S & TTL input/output levels compatible
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DESCRIPTION The SA3488 is a non-blocking digital switching matrix that is capable of routing 256 input channels to any of 256 output channels. Data is fed into and out of the device via eight serial PCM input and output channels at 2MBits/sec. The device can connect or disconnect each input channel with any output channel, as well as carry out other functions which are user programmable via an eight bit parallel microprocessor interface. The SA3488 sees its primary use as a building block in high volume electronic exchanges, voice d a t a PABX and other standard data communications applications. It can be easily configured for operation in PCM 24 or PCM 30 formats.
SA3488
PIN CONNECTIONS:
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SA3488 BLOCK DIAGRAM
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SA3488 ABSOLUTE MAXIMUM RATINGS * Symbol Parameter VCC VI VO Ptot Tstg Top Supply Voltage Input Voltage Off State Output Total Package Power Dissipation Storage Temperature Range Operating Temperature Range
Value -0.3 to 7 -0.3 to 7 7 1.5 -40 to +125 0 to +70
Unit V V V W °C °C
* Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress rating only. Functional operation of the device at these or any other condition above those indicated in the operation sections of this specification, is not implied. Exposure to Absolute Maximum Ratings for extended periods may affect device reliability.
RECOMMENDED OPERATING CONDITIONS Symbol VCC VI VO CLOCK Freq. SYNC Freq. Top Parameter Supply Voltage Input Voltage Off State Input Voltage Input Clock Frequency Input Synchronization Operating Temperature Value 4.75 to 5.25 0 to 5.25 0 to 5.25 4.096 8 0 to 70 Unit V V V MHz KHz °C
CAPACITANCES (Measuring freq. = 1MHz; Top = 0 to 70°C; unused pins tied to VSS)
Symbol Parameter CI CI/0 C0 Input Capacitance I/O Capacitance
Pins 6 to 15; 26 to 30; 32 to 36 20 to 24
M i n . T y p . M a x . Unit 5 15 10 pf pf pf
Output Capacitance 1 to 4; 17 to 19; 37 to 40
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