Skip to main content
Knowledgebase
Home
Renesas Electronics Europe - Knowledgebase

Can we switch DQ0 to DQ15 pins to high impedance?

Latest Updated:03/16/2012

Question:

In the read cycle of asynchronous SRAM, do the DQ0 to DQ15 pins switch from high impedance and start to output data only after all of LB#, UB#, CS1#, and OE# are active?

Answer:

The control signals of SRAM products are CS1#, CS2, OE#, WE#, UB#, and LB#. When performing 16bit read operation, it is necessary to obtain the following state of each control signal.
WE#=High, CS1#=Low, CS2= High, OE#=Low, and UB#/LB#=Low
The final activated control signal out of above five ones is the starting point of data output timing.
Suitable Products
Power MOSFETs for General Switching
Power MOSFETs for Automobile use
Small Signal Switching use MOSFET(uFET)
Asynchronous SRAM