LC4256B-5F256AC

Complex Programmable Logic Devices Overview

The Lattice LC4256B-5F256AC is a complex programmable logic device (CPLD) from the MachXO family, featuring 256 macrocells and 32,768 usable system gates. It operates with a maximum system clock frequency of 200 MHz at Grade 5 speed. The device utilizes non-volatile Flash technology for instant-on configuration without external memory. Key electrical parameters include a supply voltage range of 1.2V to 3.6V and support for up to 192 I/O pins in the F256 package. It integrates high-speed serial transceivers and supports multiple interface protocols including SPI, I2C, and JTAG.

Complex Programmable Logic Devices Feature Summary

• Non-volatile Flash architecture enabling instant-on operation and reduced system cost by eliminating external configuration memory.
• High-density logic resources with 256 macrocells and 32,768 system gates for complex digital designs.
• Supports high-speed serial interfaces with integrated PCS blocks for protocols like PCI Express and Ethernet.
• Robust security features including AES encryption and anti-tamper mechanisms to protect intellectual property.

Complex Programmable Logic Devices Applications

• Industrial automation control systems requiring deterministic response times.
• Telecommunications infrastructure for signal processing and protocol conversion.
• Consumer electronics where low power consumption and small form factor are critical.
• Automotive infotainment and body control modules.

Complex Programmable Logic Devices Procurement Notes

Verify the specific suffix codes on the component marking against the official datasheet to confirm temperature grade and package variant. Ensure the ordering part number matches the required speed grade (5) and package type (F256). Check for any recent lifecycle status updates such as obsolescence or recommended alternatives from the manufacturer.

Complex Programmable Logic Devices Selection Notes

Select this model when a non-volatile CPLD with moderate density and high-speed serial capabilities is needed. Compare the 256 macrocell count against design requirements to avoid over-specification. Consider the F256 package pin count relative to board space constraints. Evaluate power consumption profiles across different operating voltages if thermal management is a primary concern.

Complex Programmable Logic Devices Part Context

This component belongs to the Lattice MachXO family, which bridges the gap between simple PLDs and complex FPGAs. It offers the ease of use of a CPLD with the flexibility and advanced features of an FPGA, such as embedded memory and DSP slices. The MachXO series is known for its low power consumption and industry-leading reliability in harsh environments.

Complex Programmable Logic Devices Replacement Considerations

Direct replacements may include other devices within the Lattice MachXO family with similar macrocell counts, such as the LC4032V or LC4256V variants, depending on speed grade and package availability. Cross-family migration to ECP or CertusPro devices may be necessary if higher performance or additional features are required.

Complex Programmable Logic Devices FAQ

Does the LC4256B require external configuration memory?

No, the LC4256B uses internal non-volatile Flash technology, allowing it to boot instantly without external configuration memory.

What is the maximum operating frequency of this device?

The Grade 5 version of the LC4256B supports a maximum system clock frequency of 200 MHz.

Is the device suitable for automotive applications?

Yes, the MachXO family is designed to meet automotive reliability standards and is used in various automotive control and infotainment applications.