TM497GU8 Datasheet, PDF (4/7 Pages) Texas Instruments – 4194304-WORD BY 8-BIT DYNAMIC RAM MODULE

TM497GU8
4194304-WORD BY 8-BIT
DYNAMIC RAM MODULE
SMMS498A– APRIL 1994 – REVISED JUNE 1995
capacitance over recommended ranges of supply voltage and operating free-air temperature,
f = 1 MHz (see Note 5)
PARAMETER
Ci(A) Input capacitance, A0 – A10
Ci(RC) Input capacitance, CAS and RAS
Ci(W) Input capacitance, W
Co
Output capacitance, DQ1 – DQ8
NOTE 5: VCC = 5 V ± 0.5 V, and the bias on the pin under test is 0 V.
MIN MAX UNIT
10 pF
14 pF
14 pF
7 pF
switching characteristics over recommended ranges of supply voltage and operating free-air
temperature
PARAMETER
tAA Access time from column address
tCAC Access time from CAS low
tCPA Access time from column precharge
tRAC Access time from RAS low
tCLZ CAS to output in low-impedance state
tOH Output disable time from start of CAS high
tOFF Output disable time after CAS high (see Note 6)
NOTE 6: tOFF is specified when the output is no longer driven.
’497GU8 - 60
MIN MAX
30
15
35
60
0
3
0
15
’497GU8 - 70
MIN MAX
35
18
40
70
0
3
0
18
’497GU8 - 80
MIN MAX
40
20
45
80
0
3
0
20
UNIT
ns
ns
ns
ns
ns
ns
ns
4
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