參數(shù)資料
型號(hào): MCM69R819A
廠(chǎng)商: Motorola, Inc.
英文描述: 4M-bit Synchronous Late Write Fast SRAM(4M位同步遲寫(xiě)、快速靜態(tài)RAM)
中文描述: 4分位同步后寫(xiě)入快速靜態(tài)存儲(chǔ)器(4分位同步遲寫(xiě),快速靜態(tài)內(nèi)存)
文件頁(yè)數(shù): 9/20頁(yè)
文件大?。?/td> 309K
代理商: MCM69R819A
MCM69R736C
MCM69R818C
9
MOTOROLA FAST SRAM
AC INPUT CHARACTERISTICS
(See Note 1)
Parameter
Symbol
Min
Max
Notes
AC Input Logic High (See Figure 4)
VIH (ac)
Vref + 200 mV
AC Input Logic Low (See Figures 2 and 4)
VIL (ac)
Vref – 200 mV
2
Input Reference Peak–to–Peak AC Voltage
Vref (ac)
5% Vref (dc)
3
Clock Input Differential Voltage
Vdif (ac)
400 mV
VDDQ + 600 mV
4
NOTES:
1. Inputs may overshoot to VDD + 1.5 V (peak) for up to 35% tKHKH (e.g., 1.5 ns at a clock cycle time of 4.4 ns). See Figure 2.
2. Inputs may undershoot to –0.5 V (peak) for up to 20% tKHKH (e.g., 2 ns at a clock cycle time of 10 ns). See Figure 2.
3. Although considerable latitude in the selection of the nominal dc value (i.e., rms value) of Vref is supported, the peak–to–peak ac compo-
nent superimposed on Vref may not exceed 5% of the dc component of Vref.
4. Minimum instantaneous differential input voltage required for differential input clock operation.
VIH
VSS
–1.0 V
–1.5 V
35% tKHKH
Figure 2. Undershoot Voltage
CROSSING POINT
VDDQ
VSS
VTR
VDIF
VCP
VCM*
Figure 3. Differential Inputs/Common Mode Input Voltage
* VCM, the Common Mode Input Voltage, equals VTR – [(VTR – VCP)/2].
VIH(ac)
Vref
VIL(ac)
VDDQ
VSS
Figure 4. AC Input Conditions
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