SMJ27C256 データシートの表示（PDF） - Austin Semiconductor
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SMJ27C256 Datasheet PDF : 11 Pages
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Austin Semiconductor, Inc.
UVEPROM
SMJ27C256
CAPACITANCE OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE AND OPERATING
FREE-AIR TEMPERATURE, f = 1MHz*
PARAMETER
TEST CONDITIONS TYP**
Ci Input capacitance
VI = 0V
6
Co Output capacitance
VO = 0V
10
MAX
10
14
UNIT
pF
pF
* Capacitance measurements are made on a sample basis only.
** Typical values are at TA = 25°C and nominal voltages.
SWITCHING CHARACTERISTICS OVER RECOMMENDED RANGES OF SUPPLY VOLTAGE
AND OPERATING FREE-AIR TEMPERATURE1,2
PARAMETER
TEST
-15
-17
CONDITIONS1, 2 MIN MAX MIN MAX UNIT
ta(A) Access time from address
150
170 ns
ta(E) Access time from E\
150
170 ns
ten(G)R
tdis
tv(A)
Output enable time from G\
Disable time of output from G\ or E\,
whichever occurs first3
Output data valid time after change of
address, E\, or G\, whichever occurs first3
70
70 ns
see Figure 2
0 55 0 55 ns
0
0
ns
PARAMETER
TEST
-20
-25
-30
CONDITIONS1, 2 MIN MAX MIN MAX MIN MAX
ta(A) Access time from address
200
250
300
ta(E) Access time from E\
200
250
300
ten(G)R
tdis
tv(A)
Output enable time from G\
Disable time of output from G\ or E\,
whichever occurs first3
Output data valid time after change of
address, E\, or G\, whichever occurs first3
see Figure 2
75
100
120
0 60 0 60 0 105
0
0
0
NOTES:
1.Timing measurements are made at 2V for logic high and 0.8V for logic low (see figure 2).
2. Common test conditions apply for tdis except during programming.
3. Value calculated from 0.5V delta to measured output level. This parameter is only sampled and not 100% tested.
UNIT
ns
ns
ns
ns
ns
SWITCHING CHARACTERISTICS FOR PROGRAMMING: VCC = 6.5V and VPP = 13V (SNAP!
Pulse), TA = 25°C
PARAMETER
MIN
MAX UNIT
tdis(G) Output disable time from G\
0
130
ns
ten(G)W Output enable time from G\
150
ns
SMJ27C256
Rev. 1.0 9/01
Austin Semiconductor, Inc. reserves the right to change products or specifications without notice.
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