SN54HCT245_08 Datasheet, PDF (3/18 Pages) Texas Instruments – OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS

SN54HCT245, SN74HCT245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SCLS020E – MARCH 1984 – REVISED AUGUST 2003
recommended operating conditions (see Note 3)
SN54HCT245
MIN NOM MAX
SN74HCT245
UNIT
MIN NOM MAX
VCC
VIH
VIL
VI
VO
∆t/∆v
Supply voltage
High-level input voltage
Low-level input voltage
Input voltage
Output voltage
Input transition rise/fall time
VCC = 4.5 V to 5.5 V
VCC = 4.5 V to 5.5 V
4.5
5 5.5 4.5
5 5.5 V
2
2
V
0.8
0.8 V
0
VCC
0
VCC V
0
VCC
0
VCC V
500
500 ns
TA
Operating free-air temperature
–55
125 –40
85 °C
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
SN54HCT245 SN74HCT245
MIN TYP MAX MIN MAX MIN MAX
VOH
VOL
II
DIR or OE
IOZ A or B
ICC
∆ICC†
VI = VIH or VIL
IOH = –20 µA
IOH = –6 mA
VI = VIH or VIL
IOL = 20 µA
IOL = 6 mA
VI = VCC or 0
VO = VCC or 0
VI = VCC or 0, IO = 0
One input at 0.5 V or 2.4 V,
Other inputs at 0 or VCC
4.5 V
4.5 V
5.5 V
5.5 V
5.5 V
5.5 V
4.4 4.499
3.98 4.3
0.001
0.17
±0.1
±0.01
0.1
0.26
±100
±0.5
8
1.4 2.4
4.4
3.7
0.1
0.4
±1000
±10
160
3
4.4
3.84
0.1
0.33
±1000
±5
80
2.9
Ci‡
DIR or OE
4.5 V
to 5.5 V
3
10
10
10
† _{This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or VCC.}
‡ _{Parameter Ci does not apply to transceiver I/O ports.}
UNIT
V
V
nA
µA
µA
mA
pF
switching characteristics over recommended operating free-air temperature range, C_L = 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
tpd
ten
tdis
tt
FROM
(INPUT)
A or B
OE
OE
TO
(OUTPUT)
B or A
A or B
A or B
A or B
VCC
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
4.5 V
5.5 V
TA = 25°C
SN54HCT245 SN74HCT245
MIN TYP MAX MIN MAX MIN MAX
16
22
33
28
14
20
30
25
25
46
69
58
22
41
62
52
26
40
60
50
23
36
54
45
9
12
18
15
8
11
16
14
UNIT
ns
ns
ns
ns
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