Overview
The PSB 4595 and PSB 4596 two-chip solution forms the complete front end of a modem or fax machine. This Analog Line Interface Solution (ALIS) consists of a DAA, a codec and a hybrid circuit, and bridges the gap between the phone line and the data pump. The analog PSB 4595 is manufactured in low-power BiCMOS technology and the digital PSB 4596 in CMOS technology.

FEATUREs
• ALIS substitutes data access arrangement (DAA), codec and hybrid
• Ring detection: level, frequency and cadence
• Caller ID: detection, decoding and storage
• Programmable to different country requirements
• Programmable DC characteristics
• ALIS supports V.34+ and V.90
• ALIS complies with ETS 300 001 and FCC requirements
• Isolation by digital capacitor interface
• Analog part powered from the tip/ring line by an integrated voltage regulator
• High performance analog-to-digital and digital-toanalog conversion
• DSP-based solution for adapting the transmission behavior, especially for
   - AC impedance matching
   - trans-hybrid balancing
   - frequency response - gain
• Advanced test capabilities:
   - digital loops
   - analog loops
• High-pass filter in receive path to suppress line interference (50/60 Hz)
• Isolated control pins for general purpose use
• Advanced low-power 0.8µm analog BICMOS technology for ALIS analog and 0.8µm CMOS technology for ALIS digital
• Two-chip solution: the P-TSSOP24 and P-SSOP28 packages are PCMCIA-compliant