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TMS27C512-25JE Datasheet(PDF) 8 Page - Texas Instruments

Part # TMS27C512-25JE
Description  TMS27PC512 65536 BY 8-BIT PROGRAMMABLE READ-ONLY MEMORIES
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TMS27C512-25JE Datasheet(HTML) 8 Page - Texas Instruments

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TMS27C512 65536 BY 8-BIT UV ERASABLE
TMS27PC512 65536 BY 8-BIT
PROGRAMMABLE READ-ONLY MEMORIES
SMLS512G – NOVEMBER 1985 – REVISED SEPTEMBER 1997
8
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
switching characteristics over recommended ranges of operating conditions
PARAMETER
TEST CONDITIONS
(SEE NOTES 3 AND 4)
’27C512-10
’27PC512-10
’27C512-12
’27PC512-12
UNIT
(SEE NOTES 3 AND 4)
MIN
MAX
MIN
MAX
ta(A)
Access time from address
100
120
ns
ta(E)
Access time from chip enable
CL = 100 pF,
100
120
ns
ten(G)
Output enable time from G /VPP
CL = 100 F,
1 Series 74 TTL Load,
55
55
ns
tdis
Output disable time from G /VPP or E, whichever occurs first†
Input tr ≤ 20 ns,
Input tf ≤ 20 ns
0
45
0
45
ns
tv(A)
Output data valid time after change of address, E, or G /VPP,
whichever occurs first†
Input tf ≤ 20 ns
0
0
ns
PARAMETER
TEST CONDITIONS
(SEE NOTES 3 AND 4)
’27C512-15
’27PC512-15
UNIT
(SEE NOTES 3 AND 4)
MIN
MAX
ta(A)
Access time from address
150
ns
ta(E)
Access time from chip enable
CL = 100 pF,
150
ns
ten(G)
Output enable time from G /VPP
CL = 100 F,
1 Series 74 TTL Load,
75
ns
tdis
Output disable time from G /VPP or E, whichever occurs first†
Input tr ≤ 20 ns,
Input tf ≤ 20 ns
0
60
ns
tv(A)
Output data valid time after change of address, E, or G /VPP, whichever
occurs first†
Input tf ≤ 20 ns
0
ns
PARAMETER
TEST CONDITIONS
(SEE NOTES 3 AND 4)
’27C512-20
’27PC512-20
’27C512-25
’27PC512-25
UNIT
(SEE NOTES 3 AND 4)
MIN
MAX
MIN
MAX
ta(A)
Access time from address
200
250
ns
ta(E)
Access time from chip enable
CL = 100 pF,
200
250
ns
ten(G)
Output enable time from G /VPP
CL = 100 F,
1 Series 74 TTL Load,
75
100
ns
tdis
Output disable time from G /VPP or E, whichever occurs first†
Input tr ≤ 20 ns,
Input tf ≤ 20 ns
0
60
0
60
ns
tv(A)
Output data valid time after change of address, E, or G /VPP,
whichever occurs first†
Input tf ≤ 20 ns
0
0
ns
† Value calculated from 0.5 V delta to measured output level. This parameter is only sampled.
NOTES:
3. For all switching characteristics, the input pulse levels are 0.4 V to 2.4 V. Timing measurements are made at 2 V for logic high and
0.8 V for logic low (see Figure 2).
4. Common test conditions apply for tdis except during programming.
switching characteristics for programming: VCC = 6.50 V and G/VPP = 13 V (SNAP! Pulse),
TA = 25°C (see Note 3)
PARAMETER
MIN
MAX
UNIT
tdis(G)
Disable time, output from G /VPP
0
130
ns
NOTE 3: For all switching characteristics, the input pulse levels are 0.4 V to 2.4 V. Timing measurements are made at 2 V for logic high and
0.8 V for logic low.


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