Z0220516SSCR3641

Overview

The Z02205 is an 8-bit V.22bis modem controller manufactured by Zilog, designed for low-power and compact embedded applications. It features a 16 MHz internal clock, 16 KB of on-chip ROM containing the AT command interpreter, and 237 bytes of RAM. The device operates within a voltage range of 4.5V to 5.5V and supports a commercial temperature range of 0°C to +70°C. It provides a glueless interface to the Z02201 data pump via parallel data lines (D0-D7) and address lines (A0-A2). Key peripherals include a Watch-Dog Timer, Power-On Reset, Type-I Caller ID support, and dynamic power management capabilities.

Feature Summary

• Integrates a complete AT command set interpreter within on-chip ROM, eliminating the need for external memory storage.
• Provides a direct glueless interface to the Z02201 modem data pump using dedicated control signals such as DPCS, DPWR, and DPRD.
• Supports comprehensive call management including auto-dial, auto-answer, call progress monitoring, and handshake negotiation.
• Includes hardware features for line quality monitoring, auto-retrain, guard tone generation, and Type-I Caller ID detection.

Applications

• Embedded V.22bis modem systems requiring minimal component count
• Low-power telemetry devices utilizing dial-up telephone connections
• Industrial equipment with remote monitoring capabilities over standard phone lines

Procurement Notes

Verify that the specific ordering suffix matches the required package type, as the Z02205 is available in both 28-pin DIP and SOIC configurations. Confirm that the firmware version corresponds to the target country's telephone network standards, as default samples are tailored for North America. Ensure supply chain sources provide documentation confirming RoHS compliance status if environmental regulations apply to the final assembly.

Selection Notes

Select the Z02205 when a dedicated controller is needed to manage V.22bis modulation protocols without external program memory. This component is suitable for designs where space constraints prevent the use of discrete logic or general-purpose microcontrollers for modem control tasks. Consider the 16 MHz speed and CMOS power consumption characteristics against system battery life requirements and processing latency needs.

Part Context

The Z02205 belongs to the Zilog modem controller family, specifically engineered to pair with the Z02201 data pump. It functions as the central logic unit handling protocol interpretation and line interface control. This controller enables the construction of complete modem solutions by managing the interaction between the digital terminal equipment and the analog telephone line through the data pump.

Replacement Considerations

Publicly confirmed substitute part numbers are not identified in the provided documentation. Designers should consult Zilog archives or authorized distributors for legacy replacement options or modern equivalents with compatible pinouts and firmware interfaces.

FAQ

Does the Z02205 require external memory for its operation?

No, the Z02205 includes the complete AT command set interpreter and modem control firmware in 16 KB of on-chip ROM, so no external memory is required.

What is the maximum operating frequency of the Z02205?

The Z02205 operates at a maximum speed of 16 MHz, driven by an internal oscillator or external crystal connected to XTAL1 and XTAL2 pins.

How does the Z02205 interface with the modem data pump?

It uses a glueless parallel interface involving data lines (D0-D7), address lines (A0-A2), and control signals like Data Pump Chip Select (DPCS), Write (DPWR), and Reset (DPRESET).