TP3076 Datasheet | National Semiconductor

Description The TP3076 is a second-generation bined PCM CODEC and Filter devices optimized for digital switching applications on subscriber line and trunk cards and digital phone applications. Using advanced switched capacitor techniques, BO II bines transmit bandpass and receive lowpass channel filters with a panding PCM encoder and decoder. The devices are A-law and µ-law selectable and employ a conventional serial PCM interface capable of being clocked up to 4.096 MHz. A number of programmable functions may be controlled via a serial control port. Channel gains are programmable over a 25.4 d B range in each direction. To enable BO II to interface to the SLIC control leads, a number of programmable latches are included; each may be configured as either an input or an output. The TP3076 provides 4 latches. Features n plete CODEC and Filter system including: - Transmit and receive PCM channel filters - µ-law or A-law panding coder and decoder - Receive power amplifier drives 300Ω - 4.096 MHz serial PCM data (max) n Programmable functions: - Transmit gain: 25.4 d B range, 0.1 d B steps - Receive gain: 25.4 d B range, 0.1 d B steps - Time-slot assignment; to 64 slots/frame - 4 interface latches - A or µ-law - Analog loopback - Digital loopback n Direct interface to solid-state SLICs n Standard serial control interface n 80 m W operating power (typ) n 1.5 m W standby power (typ) n Designed for CCITT and LSSGR specifications n TTL and CMOS patible digital interfaces Note: See also AN-614 BO II application guide. Block Diagram DS009758-1 FIGURE 1. TRI-STATE ® and BO ® are registered trademarks of National Semiconductor Corporation. MICROWIRE/PLUS™ is a trademark of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS009758 .national. Connection Diagram Pin DX1 Description This transmit data TRI-STATE ® output remains in the high impedance state except during the assigned transmit time slot on the assigned port, during which the transmit...