參數(shù)資料
型號: MC74HC254A
廠商: Motorola, Inc.
英文描述: Octal 3-State Noninverting Buffer Transceiver
中文描述: 八路三態(tài)收發(fā)器同相緩沖
文件頁數(shù): 4/7頁
文件大小: 149K
代理商: MC74HC254A
MC54/74HC245A
MOTOROLA
High–Speed CMOS Logic Data
DL129 — Rev 6
4
SWITCHING WAVEFORMS
VCC
GND
tf
tr
INPUT
A OR B
OUTPUT
B OR A
10%
90%
10%
90%
tTLH
tPLH
tPHL
tTHL
Figure 1.
OUTPUT
ENABLE
A OR B
A OR B
50%
50%
50%
90%
10%
tPZL
tPLZ
tPZH
tPHZ
VCC
GND
HIGH
IMPEDANCE
VOL
VOH
HIGH
IMPEDANCE
VCC
GND
50%
Figure 2.
DIRECTION
TEST CIRCUITS
* Includes all probe and jig capacitance
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
Figure 3.
* Includes all probe and jig capacitance
CL*
TEST POINT
DEVICE
UNDER
TEST
OUTPUT
Figure 4.
CONNECT TO VCC WHEN
TESTING tPLZ AND tPZL.
CONNECT TO GND WHEN
TESTING tPHZ AND tPZH.
1 k
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