SN74LVTH16245A: Pull-down Resistor Value

Victor L-S

Part Number: SN74LVTH16245A

Hello,

I am looking at an in production design for a memory interface. Control for the OE_n and RW is provided through an SN74LVTH16245A-EP. An MPC5554 controls the RST_N.

My question is....How do I validate that the 4.7K resistors on OE_N and RW are the correct values for the SN74LVTH16245A-EP.

Thank you,

Victor

over 5 years ago

0 ShreyasRao over 5 years ago

TI__Guru 62060 points

Victor,

As long as the OE and RW lines can source more than 1mA each, it should be fine.

I = V/ R; for 3.3V, the I is ~0.7mA. Hence, more than 1mA current is required to maintain a logic high at OE/ RW pin.

Logic

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SN74LVTH16245A: Pull-down Resistor Value