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SN54HC645 Datasheet(HTML) 3 Page - Texas Instruments

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Part No. SN54HC645
Description  OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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SN54HC645 Datasheet(HTML) 3 Page - Texas Instruments

 
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SN54HC645, SN74HC645
OCTAL BUS TRANSCEIVERS
WITH 3STATE OUTPUTS
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
V
TA = 25°C
SN54HC645
SN74HC645
UNIT
PARAMETER
TEST CONDITIONS
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
1.9
1.998
1.9
1.9
IOH = –20 µA
4.5 V
4.4
4.499
4.4
4.4
VOH
VI = VIH or VIL
IOH
20
µA
6 V
5.9
5.999
5.9
5.9
V
VOH
VI VIH or VIL
IOH = –6 mA
4.5 V
3.98
4.3
3.7
3.84
V
IOH = –7.8 mA
6 V
5.48
5.8
5.2
5.34
2 V
0.002
0.1
0.1
0.1
IOL = 20 µA
4.5 V
0.001
0.1
0.1
0.1
VOL
VI = VIH or VIL
IOL 20 µA
6 V
0.001
0.1
0.1
0.1
V
VOL
VI VIH or VIL
IOL = 6 mA
4.5 V
0.17
0.26
0.4
0.33
V
IOL = 7.8 mA
6 V
0.15
0.26
0.4
0.33
II
DIR or OE
VI = VCC or 0
6 V
±0.1
±100
±1000
±1000
nA
IOZ
A or B
VO = VCC or 0
6 V
±0.01
±0.5
±10
±5
µA
ICC
VI = VCC or 0,
IO = 0
6 V
8
160
80
µA
Ci
DIR or OE
2 V to 6 V
3
10
10
10
pF
switching characteristics over recommended operating free-air temperature range, CL = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
V
TA = 25°C
SN54HC645
SN74HC645
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
VCC
MIN
TYP
MAX
MIN
MAX
MIN
MAX
UNIT
2 V
40
105
160
130
tpd
A or B
B or A
4.5 V
15
21
32
26
ns
t d
A or B
B or A
6 V
12
18
27
22
ns
2 V
125
230
340
290
ten
OE
A or B
4.5 V
23
46
68
58
ns
ten
OE
A or B
6 V
20
39
58
49
ns
2 V
74
200
300
250
tdis
OE
A or B
4.5 V
25
40
60
50
ns
tdis
OE
A or B
6 V
21
34
51
43
ns
2 V
20
60
90
75
tt
A or B
4.5 V
8
12
18
15
ns
t
6 V
6
10
15
13


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