MC-45D32CC721 Datasheet, PDF (7/16 Pages) NEC – 32 M-WORD BY 72-BIT DDR SYNCHRONOUS DYNAMIC RAM MODULE UNBUFFERED TYPE

AC Characteristics (Recommended Operating Conditions unless otherwise noted)
Test Conditions
Parameter
Symbol
Value
Unit Notes
Input Reference voltage (Input timing measurement reference level)
Termination voltage (Output timing measurement reference level)
High level ac input voltage
Low level ac input voltage
Input differential voltage (CK0 - CK2 and /CK0 - /CK2)
Input signal slew rate
VREF
VTT
VIH(ac)
VIL(ac)
VID(ac)
SLEW
VDDQ x 0.5
VREF
VREF + 0.31
VREF − 0.31
0.7
1
V
V
1
V
V
V
V/ns 2
Notes 1. Output waveform timing is measured where the output signal crosses through the VTT level.
2. Slew rate is to be maintained in the VIL (ac) to VIH(ac) range of the input signal swing. SLEW = (VIH(ac)-
VIL(ac))/ ∆t
Output
VTT
RT = 50 Ω
CLOAD = 30 pF
Preliminary Data Sheet E0033N10
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