SP1455B - Plessey

SP1455B PCM SIGNAL MONITOR

SP1450B(B) SP1450B{B) & SP1455B{B) PCM SIGNAL MONITOR CIRCUITS The SP1450 and SP1455 are bipolar integrated circuits designed to monitor errors in three-level digital signals modulated by a three-alphabet 4B3T code such as MS43. They can also indicate the failure of positive or negative pulses in the signal. The high frequency capability allows operation i.

Features

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• Suitable for 34, 120 and 140M bit! s PCM Positive and Negative Input Signal Fail Outputs High Speed Error Output Low Speed 'Stretched' Output
• Low Power Consumption VccllOVI [ 1 NEG liP fAIL [ 2 NEG lIP THRESH [ 3 INPUT [ 4 POS lIP fAlL [ 5 POS liP THRESH [ 6 NIC [ 7 VEl [8 '-" 10P Vcc210V) P 15 STRETCHED O/P 14 P STRETCH WlOTH P 13 fAST DIP P12 BIAS 11P NIC 10P N/C 91J N/C Fig.1 Pin connections (top view) DG16 APPLICATIONS
• PCM Telephone Transmission Terminal Equipment
• PCM Repeaters
• Error Checking Test Equipment QUICK REFERENCE DATA
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• Supply Voltage -4.4V to -5.25V O.