IS46LR16640C datasheet(25/47 Pages) ISSI

25 / 47 page

Rev. 0A | October 2022

www.issi.com - dram@issi.com

IS43/46LR32320C

IS43/46LR16640C

Table13 : AC Operating Test Condition

(TA= 0 ~ 70 °C for Commercial, or TA= -40 ~ 85 °C for Industrial or Automotive, VDD = 1.7V to 1.95V, VSS=0V)

Parameter

Symbol

Value

Unit

AC Input High/Low Level Voltage

VIH / VIL

0.8 x VDDQ / 0.2 x VDDQ

Input Timing Measurement Reference Level Voltage

VTRIP

0.5 x VDDQ

Input Rise / Fall Time

tR / tF

1 / 1

Output Timing Measurement Reference Level Voltage

VOUTREF

0.5 x VDDQ

Output Load Capacitance for Access Time Measurement

Figure8 : Output load circuit

Table12 : Capacitance (TA=25 °C, f=1MHz, VDD=1.8V)

Parameter

Symbol

Min

Max

Unit

Input Capacitance

CK, /CK

CI1

1.5

A0~A13, BA0~BA1, CKE, /CS, /RAS,

/CAS, /WE

CI2

1.5

DM0~DM3

CI3

3.0

5.0

Data & DQS Input/Output Capacitance

DQ0~DQ31, DQS0~DQS3

CIO

3.0

5.0

Table14 : AC Overshoot/Undershoot Specification

Parameter

Specification

Maximum Peak Amplitude allowed for Overshoot Area

0.9V

Maximum Peak Amplitude allowed for Undershoot Area

0.9V

Maximum Overshoot Area above VDD/VDDQ

3V-ns

Maximum Undershoot Area below VSS/VSSQ

3V-ns

Figure9 : AC Overshoot/Undershoot Definition

Maximum Amplitude

VDD/VDDQ

VSS/VSSQ

Voltage [V]

Maximum Amplitude

Time [ns]

Overshoot Area

Undershoot Area

Output

10.6KΩ

13.9KΩ

VDDQ

30pF

Output

30pF

50Ω

VTT=0.5 x VDDQ

Z0=50Ω

DC Output Load Circuit

AC Output Load Circuit

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