參數(shù)資料
型號(hào): SN74HC645NSR
廠商: Texas Instruments, Inc.
英文描述: OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
中文描述: 八路總線收發(fā)器與三態(tài)輸出
文件頁(yè)數(shù): 3/12頁(yè)
文件大?。?/td> 403K
代理商: SN74HC645NSR
SCLS304B
JANUARY 1996
REVISED DECEMBER 2002
3
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs
, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
VCC
TA = 25
°
C
TYP
1.998
SN54HC645
MIN
1.9
SN74HC645
MIN
1.9
UNIT
MIN
1.9
MAX
MAX
MAX
2 V
IOH =
IOH 20
μ
A
4.5 V
4.4
4.499
4.4
4.4
VOH
VI = VIH or VIL
VI VIH or VIL
6 V
5.9
5.999
5.9
5.9
V
IOH =
6 mA
IOH =
7.8 mA
4.5 V
3.98
4.3
3.7
3.84
6 V
5.48
5.8
5.2
5.34
2 V
0.002
0.1
0.1
0.1
IOL = 20
IOL 20
μ
A
4.5 V
0.001
0.1
0.1
0.1
VOL
VI = VIH or VIL
VI VIH or VIL
6 V
0.001
0.1
0.1
0.1
V
IOL = 6 mA
IOL = 7.8 mA
4.5 V
0.17
0.26
0.4
0.33
6 V
0.15
±
0.1
±
0.01
0.26
±
100
±
0.5
0.4
0.33
±
1000
II
IOZ
ICC
Ci
DIR or OE
VI = VCC or 0
VO = VCC or 0
VI = VCC or 0,
6 V
±
1000
±
10
160
nA
μ
A
μ
A
pF
A or B
6 V
±
5
80
IO = 0
6 V
8
DIR or OE
2 V to 6 V
3
10
10
10
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
(INPUT)
TO
VCC
TA = 25
°
C
TYP
SN54HC645
MIN
SN74HC645
MIN
UNIT
(OUTPUT)
MIN
MAX
105
MAX
160
MAX
130
2 V
40
tpd
td
A or B
B or A
4.5 V
15
21
32
26
ns
6 V
12
18
27
22
2 V
125
230
340
290
ten
OE
A or B
4.5 V
23
46
68
58
ns
6 V
20
39
58
49
2 V
74
200
300
250
tdis
OE
A or B
4.5 V
25
40
60
50
ns
6 V
21
34
51
43
2 V
20
60
90
75
tt
A or B
4.5 V
6 V
8
6
12
10
18
15
15
13
ns
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