IS46TR16640C datasheet(72/89 Pages) ISSI

72 / 89 page

IS43/46TR16640C, IS43/46TR16640CL

IS43/46TR81280C, IS43/46TR81280CL

Integrated Silicon Solution, Inc. – www.issi.com –

Rev. E

12/27/2024

27. The tIS(base) AC150 specifications are adjusted from the tIS(base) specification by adding an additional 100ps of

derating to accommodate for the lower altemate threshold of 150mV and another 25ps to account for the earlier

reference point [(175mV - 150mV) / 1V/ns].

28. Pulse width of a input signal is defined as the width between the first crossing of Vref(dc) and the consecutive

crossing of Vref(dc).

29. tDQSL describes the instantaneous differential input low pulse width on DQS - DQS#, as measured from one falling

edge to the next consecutive rising edge.

30. tDQSH describes the instantaneous differential input high pulse width on DQS - DQS#, as measured from one rising

edge to the next consecutive falling edge.

31. tDQSH,act + tDQSL,act = 1 tCK,act ; with tXYZ,act being the actual measured value of the respective timing

parameter in the application.

32. tDSH,act + tDSS,act = 1 tCK,act ; with tXYZ,act being the actual measured value of the respective timing parameter

in the application.

33. The tRAS(min) is required in order to complete the internal Precharge during a Read or Write with Auto Precharge.

34. During DLL off (Disable), tWR(min) is the greater of 4nCK or 15ns.

35. For DLL off (Disable)

a. Any Auto Refresh Command must have at least one NOP Command before the next Auto Refresh.

b. If tCK < 40ns, any Auto Refresh Command must be followed by a Precharge All Command.

c. For 85⁰C < tCASE ≤ 95⁰C, tCK(max) = 3.9µs. DLL off is not specified for tCASE > 95⁰C

IS46TR16640C Scheda tecnica(PDF) 72 Page - Integrated Silicon Solution, Inc