PALLV16V8Z-20PI

Overview

The PALLV16V8Z-20PI is a member of the Lattice ispMACH 4000Z family, a high-performance Complex Programmable Logic Device (CPLD). This specific variant features 16 macrocells and operates with a maximum propagation delay of 20 nanoseconds. It supports In-System Programming (ISP) via JTAG, allowing for flexible field updates without removing the device from the circuit board. The component is designed for applications requiring low power consumption combined with fast logic performance in compact packages.

Feature Summary

• 16 Macrocells with SuperFast architecture for high-speed logic operations
• Supports In-System Programming (ISP) via JTAG interface
• Low power consumption with 1.8V core voltage operation
• 5V tolerant I/O supporting LVCMOS 3.3, LVCMOS 2.5, and LVCMOS 1.8 standards

Applications

• Bus bridging and protocol conversion in embedded systems
• Address decoding and control logic for memory interfaces
• General-purpose digital logic replacement for legacy TTL/CMOS circuits
• Clock gating and signal multiplexing in industrial controllers

Procurement Notes

Verify the package type corresponds to the 'P' suffix, typically indicating a Plastic Small Outline Package (SOIC) or similar surface-mount configuration. Confirm the 'Z' suffix indicates automotive-grade qualification if required for the specific application environment. Ensure the design tool suite supports the ispMACH 4000Z family for programming and verification.

Selection Notes

Select this model when 16 macrocells are sufficient for the logic density requirements and a 20ns speed grade meets timing constraints. Consider the 5V I/O tolerance if interfacing with older 5V logic families while maintaining a lower core voltage. Compare against the standard ispMACH 4000Z variants if automotive temperature ranges or specific reliability certifications are not necessary for the project.

Part Context

This part belongs to the ispMACH 4000Z series, which integrates SuperFast technology into a low-power CPLD architecture. The series is characterized by its non-volatile Flash-based configuration, eliminating the need for external configuration memory. It serves as a drop-in replacement for many GAL and PAL devices while offering significantly higher density and reprogrammability.

Replacement Considerations

Direct pin-to-pin replacements may include other 16V8-compatible CPLDs from manufacturers such as Microchip (MachXO series) or AMD/Xilinx (XC9500 series), though logic functionality must be verified. Ensure that the replacement device supports the same VCCIO requirements and ISP capabilities if field updates are needed.