CY7C1484BV33-250BZXC

Memory IC Overview

The CY7C1484BV33-250BZXC is a 72-Mbit (2 M × 36) pipelined synchronous SRAM from Cypress Semiconductor. It supports bus operations up to 250 MHz with a maximum access time of 3.0 ns. The device features registered inputs and outputs for pipelined operation, enabling high-performance double cycle deselect functionality. It operates with a 3.3 V core power supply and supports both 2.5 V and 3.3 V I/O levels. Key specifications include a maximum operating current of 500 mA and a maximum CMOS standby current of 120 mA.

Memory IC Feature Summary

• Supports bus operation up to 250 MHz with registered inputs and outputs for pipelined performance.
• Features double cycle deselect architecture for optimal system performance without wait states during depth expansion.
• Includes user-selectable burst counter supporting Intel Pentium interleaved or linear burst sequences.
• Provides separate processor and controller address strobes with asynchronous output enable.

Memory IC Applications

• Secondary cache systems in processors requiring high-speed data access.
• Systems utilizing Intel Pentium or i486 processors with interleaved burst requirements.
• Applications demanding depth expansion capabilities without performance penalties.

Memory IC Procurement Notes

Verify the specific speed grade corresponds to the 250 MHz requirement. Confirm that the 165-ball FBGA package matches the target PCB footprint. Ensure voltage compatibility with both 3.3 V core and 2.5/3.3 V I/O supplies. Check for Pb-free compliance if required by environmental standards. Validate JTAG boundary scan integration needs against the IEEE 1149.1 implementation details.

Memory IC Selection Notes

Select this component when a 72-Mbit capacity with a 36-bit data width is required. Choose this part for designs needing pipelined synchronous access at frequencies up to 250 MHz. Consider the dual voltage I/O capability if interfacing with mixed-voltage logic. Evaluate the double cycle deselect feature if minimizing latency during bank switching is critical for the application architecture.

Memory IC Part Context

This device belongs to the CY7C1484BV33 series of pipelined DCD Sync SRAMs. It is manufactured by Cypress Semiconductor Corporation. The component is housed in a Pb-free 165-ball FBGA package. It integrates advanced synchronous peripheral circuitry with a 2-bit counter for internal burst operation.

Memory IC Replacement Considerations

Consult official replacement guides for verified substitutes. Cross-reference pinouts and electrical characteristics carefully. Verify compatibility with existing system timing constraints before substitution.

Memory IC FAQ

How is the burst sequence order determined?

The burst sequence is user-selectable via the MODE input pin. Tying MODE to GND selects a linear burst sequence, while leaving it floating or tying it to VDD selects an interleaved burst sequence.

What is the function of the ZZ pin?

The ZZ pin is an asynchronous sleep input. Asserting it HIGH places the device in a non-time-critical sleep mode to conserve power while preserving data integrity. Two clock cycles are required to enter or exit this mode.

Can the JTAG feature be disabled?

Yes, the JTAG feature can be disabled by tying the TCK pin LOW. In this state, TDI and TMS may be left unconnected or pulled up, and TDO must be left unconnected.