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TMS27PC256 Datasheet(PDF) 9 Page - Texas Instruments

Part # TMS27PC256
Description  TMS27C256 32768 BY 8-BIT UV ERASABLE TMS27PC256 32768 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

TMS27PC256 Datasheet(HTML) 9 Page - Texas Instruments

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TMS27C256 32768 BY 8-BIT UV ERASABLE
TMS27PC256 32768 BY 8-BIT
PROGRAMMABLE READ-ONLY MEMORIES
SMLS256H– SEPTEMBER 1984 – REVISED NOVEMBER 1997
9
POST OFFICE BOX 1443
HOUSTON, TEXAS 77251–1443
PARAMETER MEASUREMENT INFORMATION
2.08 V
RL = 800 Ω
Output
Under Test
CL = 100 pF
(see Note A)
NOTE A: CL includes probe and fixture capacitance.
ac testing input / output wave forms
2.4 V
0.4 V
0.8 V
0.8 V
2 V
2 V
AC testing inputs are driven at 2.4 V for logic high and 0.4 V for logic low. Timing measurements are made at
2 V for logic high and 0.8 V for logic low for both inputs and outputs.
Figure 2. AC Testing Output Load Circuit
A0 – A14
E
Addresses Valid
ta(E)
G
DQ0 – DQ7
Hi-Z
ten(G)
tv(A)
tdis
Output Valid
VIH
VIL
VIH
VIL
VIH
VIL
VOH
VOL
Hi-Z
ta(A)
Figure 3. Read-Cycle Timing


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