Datasheet
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Electrical Characteristics
(1) (2)
SN74LVCH8T245
8-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES637A – AUGUST 2005 – REVISED FEBRUARY 2007
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CCA
V
CCB
MIN TYP MAX MIN MAX UNIT
I
OH
= –100 µ A, V
I
= V
IH
1.65 V to 4.5 V 1.65 V to 4.5 V V
CCO
– 0.1
I
OH
= –4 mA, V
I
= V
IH
1.65 V 1.65 V 1.2
V
OH
I
OH
= –8 mA, V
I
= V
IH
2.3 V 2.3 V 1.9 V
I
OH
= –24 mA, V
I
= V
IH
3 V 3 V 2.4
I
OH
= –32 mA, V
I
= V
IH
4.5 V 4.5 V 3.8
I
OL
= 100 µ A, V
I
= V
IL
1.65 V to 4.5 V 1.65 V to 4.5 V 0.1
I
OL
= 4 mA, V
I
= V
IL
1.65 V 1.65 V 0.45
V
OL
I
OL
= 8 mA, V
I
= V
IL
2.3 V 2.3 V 0.3 V
I
OL
= 24 mA, V
I
= V
IL
3 V 3 V 0.55
I
OL
= 32 mA, V
I
= V
IL
4.5 V 4.5 V 0.55
Control
I
I
V
I
= V
CCA
or GND 1.65 V to 5.5 V 1.65 V to 5.5 V ± 0.5 ± 1 ± 2 µ A
inputs
V
I
= 0.58 V 1.65 V 1.65 V 15
V
I
= 0.7 V 2.3 V 2.3 V 45
I
BHL
(3)
µ A
V
I
= 0.8 V 3 V 3 V 75
V
I
= 0.1.35 V 4.5 V 4.5 V 100
V
I
= 1.07 V 1.65 V 1.65 V –15
V
I
= 1.7 V 2.3 V 2.3 V –45
I
BHH
(4)
µ A
V
I
= 2 V 3 V 3 V –75
V
I
= 3.15 V 4.5 V 4.5 V –100
1.95 V 1.95 V 200
2.7 V 2.7 V 300
I
BHLO
(5)
V
I
= 0 to V
CC
µ A
3.6 V 3.6 V 500
5.5 V 5.5 V 900
1.95 V 1.95 V –200
2.7 V 2.7 V –300
I
BHHO
(6)
V
I
= 0 to V
CC
µ A
3.6 V 3.6 V –500
5.5 V 5.5 V –900
A port 0 V 0 to 5.5 V ± 0.5 ± 1 ± 2
I
off
V
I
or V
O
= 0 to 5.5 V µ A
B port 0 to 5.5 V 0 V ± 0.5 ± 1 ± 2
A or B
OE = V
IH
1.65 V to 5.5 V 1.65 V to 5.5 V ± 1 ± 2
port
V
O
= V
CCO
or GND,
I
OZ
µ A
B port V
I
= V
CCI
or GND 0 V 5.5 V ± 1 ± 2
OE = don't
care
A port 5.5 V 0 V ± 1 ± 2
1.65 V to 5.5 V 1.65 V to 5.5 V 20
I
CCA
V
I
= V
CCI
or GND, I
O
= 0 5 V 0 V 20 µ A
0 V 5 V –2
1.65 V to 5.5 V 1.65 V to 5.5 V 20
I
CCB
V
I
= V
CCI
or GND, I
O
= 0 5 V 0 V –2 µ A
0 V 5 V 20
I
CCA
+ I
CCB
V
I
= V
CCI
or GND, I
O
= 0 1.65 V to 5.5 V 1.65 V to 5.5 V 30 µ A
(1) V
CCO
is the V
CC
associated with the output port.
(2) V
CCI
is the V
CC
associated with the input port.
(3) The bus-hold circuit can sink at least the minimum low sustaining current at V
IL
max. I
BHL
should be measured after lowering V
IN
to GND
and then raising it to V
IL
max.
(4) The bus-hold circuit can source at least the minimum high sustaining current at V
IH
min. I
BHH
should be measured after raising V
IN
to
V
CC
and then lowering it to V
IH
min.
(5) An external driver must source at least I
BHLO
to switch this node from low to high.
(6) An external driver must sink at least I
BHHO
to switch this node from high to low.
5
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