Datasheet

SN54HC688, SN74HC688
8-BIT IDENTITY COMPARATORS
SCLS010D – DECEMBER 1982 – REVISED AUGUST 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
V
CC
T
A
= 25°C SN54HC688 SN74HC688
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
P or Q
P = Q
2 V 113 210 313 265
ns
t
P or Q
P = Q
4.5 V 30 42 63 53
ns
t
pd
6 V 24 36 53 45
ns
t
pd
OE
P = Q
2 V 66 120 179 151
ns
OE
P = Q
4.5 V 16 24 36 30
6 V 14 20 30 26
t
Any
2 V 38 75 110 95
ns
t
t
Any
4.5 V 8 15 22 19
ns
t
6 V 6 13 19 16
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load 40 pF