Z16M1720ASC1868TR

Specialized Overview

The Z16M1720ASC1868TR is a PCMCIA interface adapter chip from the Z16M17 series, designed for card-side implementation. It features 256 bytes of on-chip RAM and supports operation at clock frequencies up to 20 MHz. The device operates within a power supply range of 3.0V to 5.5V and is housed in a 100-pin VQFP package. As a mirror-image bond-out variant, it provides pin compatibility with standard Z16017 devices while offering alternative internal routing configurations.

Specialized Feature Summary

• Supports PCMCIA Configuration Registers and Attribute Memory management
• Includes an internal EEPROM sequencer for Master mode configuration
• Provides Serial Peripheral Interface (SPI) circuitry for Slave mode control by local microprocessors
• Enables translation between PCMCIA and ATA/IDE or I/O peripheral buses

Specialized Applications

• Ethernet controller integration on PCMCIA cards
• Universal Asynchronous Receiver/Transmitter (UART) implementations
• Modem connectivity solutions
• Rotating disk memory storage interfaces

Specialized Procurement Notes

Verify the specific suffix ASC1868TR against the official Zilog ordering guide to confirm tape-and-reel packaging and temperature grade. Ensure the mirror-image bond-out requirement aligns with PCB layout constraints, as this variant differs physically from standard Z16017 parts despite functional equivalence.

Specialized Selection Notes

Select the Z16M17 variant when the design requires a mirror-image pinout for board symmetry or manufacturing flexibility. Confirm that the host system can support either the Master mode EEPROM configuration or the Slave mode SPI programming method. Verify voltage levels match the 3.0V to 5.5V operating range.

Specialized Part Context

This component belongs to the ZX6017 family, which includes the Z86017, Z16017, and their mirror-image counterparts Z86M17 and Z16M17. These chips serve as general-purpose adapters for connecting various peripherals to PCMCIA slots. The Z16M17 specifically offers the same functionality as the Z16017 but with reversed bond-out patterns.

Specialized Replacement Considerations

The Z16017 is the primary functional equivalent. However, substitution requires careful evaluation of the physical package orientation due to the mirror-image bond-out difference. The Z86M17 is also functionally similar but may have different core architecture characteristics.