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TP3420AV Datasheet(PDF) 27 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # TP3420AV
Description  ISDN S/T Interface Device
PDF  32 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

TP3420AV Datasheet(HTML) 27 Page - National Semiconductor (TI)

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Timing Diagrams (Continued)
Definitions and Timing Conventions
DEFINITIONS
V
IH
V
IH is the d.c. input level above which an
input level is guaranteed to appear as a
logical one. This parameter is to be
measured by performing a functional
test at reduced clock speeds and nomi-
nal timing, (i.e. not minimum setup and
hold times or output strobes), with the
high level of all driving signals set to V
IH
and maximum supply voltages applied
to the device.
V
IL
V
IL is the d.c. input level below which an
input level is guaranteed to appear as a
logical zero to the device. This param-
eter is measured in the same manner as
V
IH but with all driving signal low levels
set to V
IL and minimum supply voltages
applied to the device.
V
OH
V
OH is the minimum d.c. output level to
which an output placed in a logical one
state will converge when loaded at the
maximum specified load current.
DS009143-26
FIGURE 10. Timing Details for Digital System Interface
DS009143-27
FIGURE 11. Timing Details for TEM, DCKE Mode
www.national.com
27



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