Data Sheet

©2006 Fairchild Semiconductor Corporation www.fairchildsemi.com
74AC240, 74ACT240 Rev. 1.2.0 4
74AC240, 74ACT240 — Octal Buffer/Line Driver with 3-STATE Outputs
DC Electrical Characteristics for AC
Notes:
1. All outputs loaded; thresholds on input associated with output under test.
2. I
IN
and I
CC
@ 3.0V are guaranteed to be less than or equal to the respective limit @ 5.5V V
CC
.
3. Maximum test duration 2.0ms, one output loaded at a time.
Symbol Parameter V
CC
(V) Conditions
T
A
= + 25 ° CT
A
= − 40 ° C to + 85 ° C
UnitsTyp. Guaranteed Limits
V
IH
Minimum HIGH Level
Input Voltage
3.0 V
OUT
= 0.1V or
V
CC
– 0.1V
1.5 2.1 2.1 V
4.5 2.25 3.15 3.15
5.5 2.75 3.85 3.85
V
IL
Maximum LOW Level
Input Voltage
3.0 V
OUT
= 0.1V or
V
CC
– 0.1V
1.5 0.9 0.9 V
4.5 2.25 1.35 1.35
5.5 2.75 1.65 1.65
V
OH
Minimum HIGH Level
Output Voltage
3.0 I
OUT
= –50µA 2.99 2.9 2.9 V
4.5 4.49 4.4 4.4
5.5 5.49 5.4 5.4
3.0 V
IN
= V
IL
or V
IH
,
I
OH
= –12mA
2.56 2.46
4.5 V
IN
= V
IL
or V
IH
,
I
OH
= –24mA
3.86 3.76
5.5 V
IN
= V
IL
or V
IH
,
I
OH
= –24mA
(1)
4.86 4.76
V
OL
Maximum LOW Level
Output Voltage
3.0 I
OUT
= 50µA 0.002 0.1 0.1 V
4.5 0.001 0.1 0.1
5.5 0.001 0.1 0.1
3.0 V
IN
= V
IL
or V
IH
,
I
OL
= 12mA
0.36 0.44
4.5 V
IN
= V
IL
or V
IH
,
I
OL
= 24mA
0.36 0.44
5.5 V
IN
= V
IL
or V
IH
,
I
OL
= 24mA
(1)
0.36 0.44
I
IN
(2)
Maximum Input
Leakage Current
5.5 V
I
= V
CC
, GND ±0.1 ±1.0 µA
I
OZ
Maximum 3-STATE
Leakage Current
5.5 V
I
(OE) = V
IL
, V
IH
;
V
I
= V
CC
, GND;
V
O
= V
CC
, GND
±0.25 ±2.5 µA
I
OLD
Minimum Dynamic
Output Current
(3)
5.5 V
OLD
= 1.65V Max. 75 mA
I
OHD
5.5 V
OHD
= 3.85V Min. -75 mA
I
CC
(2)
Maximum Quiescent
Supply Current
5.5 V
IN
= V
CC
or GND 4.0 40.0 µA