參數(shù)資料
型號: MC74HC245AN
廠商: MOTOROLA INC
元件分類: 通用總線功能
英文描述: Octal 3-State Noninverting Bus Transceiver
中文描述: HC/UH SERIES, 8-BIT TRANSCEIVER, TRUE OUTPUT, PDIP20
封裝: PLASTIC, DIP-20
文件頁數(shù): 3/6頁
文件大小: 200K
代理商: MC74HC245AN
MC54/74HC245A
High–Speed CMOS Logic Data
DL129 — Rev 6
3
MOTOROLA
tPHL
(Figures 1 and 3)
4.5
15
22
6.0
19
19
28
tPZL,
Maximum Propagation Delay, Output Enable to A or B
2.0
110
140
24
165
ns
tTHL
(Figures 1 and 3)
4.5
12
18
15
NOTE:For propagation delays with loads other than 50 pF, and information on typical parametric values, see Chapter 2 of the Motorola High–
Speed CMOS Data Book (DL129/D).
CPD
Power Dissipation Capacitance (Per Transceiver Channel)*
* Used to determine the no–load dynamic power consumption: PD = CPD VCC2f + ICC VCC. For load considerations, see Chapter 2 of the
Motorola High–Speed CMOS Data Book (DL129/D).
Typical @ 25
°
C, VCC = 5.0 V
40
pF
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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