CD22301

CD22301 January 1997 Monolithic PCM Repeater Description The CD22301 monolithic PCM repeater circuit is designed for T1 carrier systems operating with a bipolar pulse train of 1.544Mbits/s. It can also be used in the T148 carrier system operating with a ternary pulse train of 2.37Mbits/s. The circuit operates from a 5.1V ±5% externally regulated supply. The CD22301 provides active circuitry to perform all functions of signal equalization and amplification, automatic line buildout (ALBO), threshold detection, clock extraction, pulse timing and buffered output formation. Features Automatic Line Buildout Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.1V Buffered Output Applications Bipolar Carrier System . . . . . . . . . . . . .T1 1.544Mbits/s Ternary Carrier System . . . . . . . . . . . .T148 2.37Mbits/s Ordering Information PART NUMBER CD22301E TEMP. RANGE (oC) -40 to 85 PACKAGE 18 Ld PDIP PKG. NO. E18.3 Pinout CD22301 (PDIP) TOP VIEW ALBO GROUND ALBO 1 OUTPUT ALBO 2 OUTPUT ALBO 3 OUTPUT PREAMP INPUT + PREAMP INPUT PREAMP OUTPUT + PREAMP OUTPUT VEE 1 2 3 4 5 6 7 8 9 18 SUBSTRATE 17 ALBO BIAS 16 OSC BIAS 15 LC TANK INPUT 14 VCC 13 CLOCK LIMITER OUTPUT 12 TIMING PULSE INPUT 11 OUTPUT PULSE 1 10 OUTPUT PULSE 2 Functional Diagram ALBO OUTPUT CIRCUIT ALBO GND 1 ALBO BIAS 17 1K VCC 15K 100Ω 100Ω 100Ω 50K 18K FROM ALBO PEAK DETECTOR AO1 AO2 2 3 100Ω 100Ω 100Ω VEE AO3 4 CAUTION: These devices are sensitive to electrostatic discharge; ...