CY7C4261-15JXC

FIFOs Memory Overview

The CY7C4261-15JXC is a 16K x 9 synchronous FIFO memory fabricated using 0.5 micron CMOS technology. It features independent read and write clocks, supporting maximum frequencies of 66.7 MHz with a 10 ns access time. The device operates on a single 5V supply with an active current of 35 mA. It includes programmable Almost Full and Almost Empty flags, TTL-compatible inputs, and center power/ground pins for noise reduction. The component is housed in a 32-pin Plastic Leaded Chip Carrier (PLCC) package.

FIFOs Memory Feature Summary

• Supports fully asynchronous and simultaneous read and write operations via independent clock domains.
• Features programmable status flags for precise buffer level monitoring.
• Enables width expansion by cascading multiple devices to increase data bus width.

FIFOs Memory Applications

• High-speed data acquisition systems
• Multiprocessor interface buffering
• Communications network buffering

FIFOs Memory Procurement Notes

Verify the specific ordering suffix 'JXC' confirms the lead-free (Pb-Free) 32-pin PLCC package variant. Confirm the manufacturer source, as Cypress Semiconductor was acquired by Infineon Technologies. Ensure the commercial temperature range specification aligns with the target application environment requirements.

FIFOs Memory Selection Notes

Select this model for applications requiring 16K depth and 9-bit word width. Choose the -15 speed grade for 66.7 MHz operation. Consider the CY7C4271 if 32K depth is required. Verify compatibility with existing system voltage levels and clocking architectures before integration.

FIFOs Memory Part Context

This component belongs to the CY7C4261/71 Deep Sync FIFO family. It serves as a density upgrade option for legacy IDT72201/11/21/31/41/51 series parts. The device maintains pin compatibility within its family while offering optimized speed and power characteristics through advanced CMOS fabrication processes.

FIFOs Memory Replacement Considerations

Pin-compatible alternatives include the CY7C4271 for increased depth or other speed grades within the same package. Legacy replacements may include the IDT72201/11/21/31/41/51 series, subject to verification of electrical parameter alignment.

FIFOs Memory FAQ

How are the Programmable Almost Empty and Almost Full flags configured?

These flags are configured by writing offset values into internal registers. This is done by holding WEN2/LD LOW during reset and using subsequent clock cycles to load the empty and full offset registers.

What is the function of the WEN2/LD dual-mode pin?

If held HIGH at reset, it acts as a second write enable for depth expansion. If held LOW at reset, it functions as a Load (LD) enable to program the flag offset registers.