Zilog Z0220516SSGR3641

The Z02205 V.22bis Modem Controller serves as the modem controller in embedded V.22bis modem applications. A complete modem can be made by adding ZiLOG data pump (Z02201), phone line interface, and the required DTE interface. The Z02205 has been designed for low-cost use and includes a glueless interface to the ZiLOG data pumps. The Z02205 is ideal for applications where small size and low power consumption are requirements. The Z02205 operates over dial-up telephone connections, provides auto-dial and ring detect, and operates in either SYNC or ASYNC modes. The Z02205 includes AT command and modem control firmware in on-chip ROM. It also includes enhanced wakeup circuitry, programmable Watch-Dog Timers (WDT), and low-noise/EMI options. AT commands stored on-chip in ROM provide control over the following modem controller functions: Call progress monitoring Handshake negotiation Dial controls—pulse or tone S-registers Auto-answer and auto-dial Guard tones On-hook and off-hook Auto-retrain

• Includes AT command set interpreter in on-chip ROM— no external memory required
• Supports Tone dial or Pulse dial
• Call progress monitoring controls
• Handshake controls
• Guard Tone controls
• Line quality monitoring and Auto-Retrain
• Auto-Dial and Auto-Answer
• Glueless interface to Z02201 modem data pump
• Watch-Dog Timer (WDT)/Power-On Reset (POR)
• Type-I Caller ID
• Dynamic power management
• CMOS design for low power consumption
• 0°C to +70°C commercial temperature range
• 28-pin DIP, SOIC package
• 4.5V to 5.5V operating range