Datasheet
www.ti.com
Timing Requirements
Switching Characteristics
Switching Characteristics
SN54LVC646A, SN74LVC646A
OCTAL BUS TRANSCEIVERS AND REGISTERS
WITH 3-STATE OUTPUTS
SCAS302J – JANUARY 1993 – REVISED AUGUST 2005
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2 )
SN74LVC646A
V
CC
= 1.8 V V
CC
= 2.5 V V
CC
= 3.3 V
V
CC
= 2.7 V UNIT
± 0.18 V ± 0.2 V ± 0.3 V
MIN MAX MIN MAX MIN MAX MIN MAX
f
clock
Clock frequency
(1) (1)
150 150 MHz
t
w
Pulse duration
(1) (1)
3.3 3.3 ns
t
su
Setup time, data before CLK ↑
(1) (1)
1.6 1.5 ns
t
h
Hold time, data after CLK ↑
(1) (1)
1.7 1.7 ns
(1) This information was not available at the time of publication.
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2 )
SN54LVC646A
FROM TO V
CC
= 3.3 V
PARAMETER V
CC
= 2.7 V UNIT
(INPUT) (OUTPUT) ± 0.3 V
MIN MAX MIN MAX
f
max
150 150 MHz
A or B B or A 7.9 1 7.4
t
pd
CLK 8.8 1 8.4 ns
A or B
SBA or SAB 9.9 1 8.6
t
en
OE A 10.2 1 8.2 ns
t
dis
OE A 8.9 1 7.5 ns
t
en
DIR B 10.4 1 8.3 ns
t
dis
DIR B 8.7 1 7.9 ns
over recommended operating free-air temperature range (unless otherwise noted) (see Figure 2 )
SN74LVC646A
FROM TO V
CC
= 1.8 V V
CC
= 2.5 V V
CC
= 3.3 V
PARAMETER V
CC
= 2.7 V UNIT
(INPUT) (OUTPUT) ± 0.15 V ± 0.2 V ± 0.3 V
MIN MAX MIN MAX MIN MAX MIN MAX
f
max
(1) (1)
150 150 MHz
A or B B or A
(1) (1) (1) (1)
7.9 1 7.4
t
pd
CLK
(1) (1) (1) (1)
8.8 1 8.4 ns
A or B
SBA or SAB
(1) (1) (1) (1)
9.9 1 8.6
t
en
OE A
(1) (1) (1) (1)
10.2 1 8.2 ns
t
dis
OE A
(1) (1) (1) (1)
8.9 1 7.5 ns
t
en
DIR B
(1) (1) (1) (1)
10.4 1 8.3 ns
t
dis
DIR B
(1) (1) (1) (1)
8.7 1 7.9 ns
(1) This information was not available at the time of publication.
7