參數(shù)資料
型號(hào): TP3420AV
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): 數(shù)字傳輸電路
英文描述: ISDN S/T Interface Device
中文描述: DATACOM, DIGITAL SLIC, PQCC20
封裝: PLASTIC, LCC-20
文件頁(yè)數(shù): 27/32頁(yè)
文件大?。?/td> 524K
代理商: TP3420AV
Timing Diagrams
(Continued)
Definitions and Timing Conventions
DEFINITIONS
V
IH
V
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
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
but with all driving signal low levels
set to V
and minimum supply voltages
applied to the device.
V
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.
V
OH
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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