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Switching Characteristics
Switching Characteristics
SN74LVCH8T245
8-BIT DUAL-SUPPLY BUS TRANSCEIVER
WITH CONFIGURABLE VOLTAGE TRANSLATION AND 3-STATE OUTPUTS
SCES637A – AUGUST 2005 – REVISED FEBRUARY 2007
Electrical Characteristics (continued)
over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITIONS V
CCA
V
CCB
MIN TYP MAX MIN MAX UNIT
DIR at V
CCA
– 0.6 V,
∆ I
CCA
DIR B port = open, 3 V to 5.5 V 3 V to 5.5 V 50 µ A
A port at V
CCA
or GND
Control
C
i
V
I
= V
CCA
or GND 3.3 V 3.3 V 4 5 pF
inputs
A or B 8.5 10
C
io
V
O
= V
CCA/B
or GND 3.3 V 3.3 V pF
port
over recommended operating free-air temperature range, V
CCA
= 1.8 V ± 0.15 V (unless otherwise noted) (see Figure 1 )
V
CCB
= 1.8 V V
CCB
= 2.5 V V
CCB
= 3.3 V V
CCB
= 5 V
FROM TO
± 0.15 V ± 0.2 V ± 0.3 V ± 0.5 V
PARAMETER UNIT
(INPUT) (OUTPUT)
MIN MAX MIN MAX MIN MAX MIN MAX
t
PLH
A B 1.7 21.9 1.3 9.2 1 7.4 0.4 7.1 ns
t
PHL
t
PLH
B A 0.9 23.8 0.8 23.6 0.7 23.4 0.7 23.4 ns
t
PHL
t
PHZ
OE A 1.5 29.6 1.5 29.4 1.5 29.3 1.4 29.2 ns
t
PLZ
t
PHZ
OE B 2.4 32.2 1.9 13.1 1.7 12 1.3 10.3 ns
t
PLZ
t
PZH
OE A 0.4 24 0.4 23.8 0.4 23.7 0.4 23.7 ns
t
PZL
t
PZH
OE B 1.8 32 1.5 16 1.2 12.6 0.9 10.8 ns
t
PZL
over recommended operating free-air temperature range, V
CCA
= 2.5 V ± 0.2 V (unless otherwise noted) (see Figure 1 )
V
CCB
= 1.8 V V
CCB
= 2.5 V V
CCB
= 3.3 V V
CCB
= 5 V
FROM TO
± 0.15 V ± 0.2 V ± 0.3 V ± 0.5 V
PARAMETER UNIT
(INPUT) (OUTPUT)
MIN MAX MIN MAX MIN MAX MIN MAX
t
PLH
A B 1.5 21.4 1.2 9 0.8 6.2 0.6 4.8 ns
t
PHL
t
PLH
B A 1.2 9.3 1 9.1 1 8.9 0.9 8.8 ns
t
PHL
t
PHZ
OE A 1.4 9 1.4 9 1.4 9 1.4 9 ns
t
PLZ
t
PHZ
OE B 2.3 29.6 1.8 11 1.7 9.3 0.9 6.9 ns
t
PLZ
t
PZH
OE A 1 10.9 1 10.9 1 10.9 1 10.9 ns
t
PZL
t
PZH
OE B 1.7 28.2 1.5 12.9 1.2 9.4 1 6.9 ns
t
PZL
6
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