Q67100-H8322 Просмотр технического описания (PDF) - Siemens AG
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Q67100-H8322 Datasheet PDF : 53 Pages
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PEB 2045
PEF 2045
1.3 Device Overview
The Siemens Memory Time Switch PEx 2045 is a monolithic CMOS circuit connecting any of 512
incoming PCM channels to any of 256 outgoing PCM channels. The on-chip connection memory is
accessed via the 8-bit µP interface.
The PEx 2045 is fabricated using the advanced CMOS technology from Siemens and is mounted
in a P-DIP-40 or a P-LCC-44 package. Inputs and outputs are TTL-compatible.
The PEx 2045 is pin and software compatible to the PEB 2040. In addition, it includes the following
features:
q 4096-kHz device clock
q 4096-kbit/s PCM-data rate
q Primary access configuration
q Fast connection memory access
1.4 System Integration
The main application fields for the PEx 2045 are in switches and primary access units. Figure 3
shows a non-blocking switch for 512 input and 512 output channels using only two devices.
Figure 4 shows how 8 devices can be arranged to form a non-blocking 1024-channel switch.
PCM IN
16
2 MHz
PEx 2045
PEx 2045
8
PCM OUT
2 MHz
8
ITS00583
Figure 3
Memory Time Switch 16/16 for a Non-Blocking 512-Channel Switch
This is possible due to the tristate capability of the PEx 2045.
Semiconductor Group
6
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