Datasheet
SCLS304B – JANUARY 1996 – REVISED DECEMBER 2002
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, C
L
= 150 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO
V
T
A
= 25°C SN54HC645 SN74HC645
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 54 135 200 170
t
pd
A or B B or A
4.5 V 18 27 40 34
ns
t
d
A
or
B
B
or
A
6 V 15 23 34 29
ns
2 V 150 270 405 335
t
en
OE A or B
4.5 V 31 54 81 67
ns
t
en
OE
A
or
B
6 V 25 46 69 56
ns
2 V 45 210 315 265
t
t
A or B
4.5 V 17 42 63 53
ns
t
6 V 13 36 53 45
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance per transceiver No load 40 pF