LC4128V-75TN100C

The LC4128V-75TN100C is a high-performance Complex Programmable Logic Device (CPLD) from Lattice Semiconductor’s ispMACH 4000V family. With 128 macrocells and 64 user I/O pins, this 3.3V device delivers exceptional speed with 7.5ns pin-to-pin propagation delay and maximum operating frequencies up to 333MHz. The ispMACH 4000 architecture features enhanced macrocells with individual clock, reset, preset, and clock enable signals for maximum design flexibility. Four global output enable signals complement per-pin output enable control, providing fine-grained control over I/O direction. The device operates from a 3.0V to 3.6V core supply and supports multiple I/O standards including LVTTL and LVCMOS at 3.3V, 2.5V, and 1.8V levels. In-system programmability (ISP) via the industry-standard JTAG interface allows programming and reconfiguration of the device after it has been soldered to the PCB, facilitating field updates and reducing manufacturing complexity. The non-volatile EEPROM configuration memory retains the design through power cycles without the need for external configuration memory. Programmable output slew rate helps manage electromagnetic emissions. Pin-locking capability allows design changes without altering the PCB pinout. Available in a 100-pin TQFP package for commercial temperature range (0°C to 90°C), the LC4128V-75TN100C is ideal for applications requiring high-speed glue logic, bus interfacing, state machines, power sequencing, and system configuration control.

The LC4128V-75TN100C operates as a non-volatile, in-system programmable CPLD. Its architectural blocks include: 1) Logic Array Blocks (LABs): The device contains 8 Logic Array Blocks, each with 16 macrocells (total 128 macrocells). Each LAB consists of a programmable AND array feeding into the macrocell flip-flops. The AND array implements combinatorial logic functions of the inputs to the LAB. Inter-LAB routing connects outputs of one LAB to inputs of other LABs. 2) Enhanced Macrocells: Each macrocell can be individually configured for either combinatorial or registered operation. Registered macrocells support D, T, JK, or SR flip-flop configurations. Each macrocell has independent clock, asynchronous reset, asynchronous preset, and clock enable controls, providing exceptional design flexibility. The macrocell output can feed back into the logic array or drive an I/O pin. 3) I/O Cells: 64 user I/O pins each feature an I/O cell with input register, output enable control, and programmable output slew rate. I/O buffers support multiple standards: LVTTL and LVCMOS at 3.3V, 2.5V, and 1.8V. Four global output enable signals and per-pin OE control provide flexible three-state control. 4) JTAG ISP Interface: A standard JTAG (IEEE 1149.1) interface provides access for in-system programming, boundary scan testing, and device identification. Programming is performed via the JTAG TAP controller, which writes configuration data into the EEPROM memory array. 5) Non-Volatile EEPROM Memory: EEPROM-based configuration storage retains the programmed design without power. The configuration memory is organized to control all aspects of the device: logic functions, macrocell configurations, I/O settings, and interconnect routing.

• Bus interface logic and protocol bridging between different bus standards
• System initialization, power sequencing, and reset generation circuits
• Address decoding and chip select generation for memory and peripheral mapping
• State machine implementation for control and sequencing logic
• Glue logic in embedded systems and computer-on-module designs
• FPGA configuration control and boot sequence management
• Industrial control, test equipment, and instrumentation
• Video display and timing control circuits