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Switching Characteristics
Switching Characteristics
Operating Characteristics
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, V
CCA
= 3.3 V ± 0.3 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 21.2 1.1 8.8 0.8 6.2 0.5 4.4 ns
t
PHL
t
PLH
B A 0.8 7.2 0.8 6.2 0.7 6.1 0.6 6 ns
t
PHL
t
PHZ
OE A 1.6 8.2 1.6 8.2 1.6 8.2 1.6 8.2 ns
t
PLZ
t
PHZ
OE B 2.1 29 1.7 10.3 1.5 8.6 0.8 6.3 ns
t
PLZ
t
PZH
OE A 0.8 8.1 0.8 8.1 0.8 8.1 0.8 8.1 ns
t
PZL
t
PZH
OE B 1.8 27.7 1.4 12.4 1.1 8.5 0.9 6.4 ns
t
PZL
over recommended operating free-air temperature range, V
CCA
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1 )
V
CC
= 1.8 V V
CC
= 2.5 V V
CC
= 3.3 V V
CC
= 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 8.8 0.7 6 0.4 4.2 ns
t
PHL
t
PLH
B A 0.7 7 0.4 4.8 0.3 4.5 0.3 4.3 ns
t
PHL
t
PHZ
OE A 0.3 5.4 0.3 5.4 0.3 5.4 0.3 5.4 ns
t
PLZ
t
PHZ
OE B 2 28.7 1.6 9.7 1.4 8 0.7 5.7 ns
t
PLZ
t
PZH
OE A 0.7 6.4 0.7 6.4 0.7 6.4 0.7 6.4 ns
t
PZL
t
PZH
OE B 1.5 27.6 1.3 11.4 1 8.1 0.9 6 ns
t
PZL
T
A
= 25 ° C
V
CCA
= V
CCA
= V
CCA
= V
CCA
=
TEST
V
CCB
= 1.8 V V
CCB
= 2.5 V V
CCB
= 3.3 V V
CCB
= 5 V
PARAMETER UNIT
CONDITIONS
TYP TYP TYP TYP
A-port input, B-port output 2 2 2 3
C
pdA
(1)
C
L
= 0,
B-port input, A-port output 12 13 13 16
f = 10 MHz, pF
A-port input, B-port output 13 13 14 16
t
r
= t
f
= 1 ns
C
pdB
(1)
B-port input, A-port output 2 2 2 3
(1) Power dissipation capacitance per transceiver
7
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