SN54LS240, SN54LS241, SN54LS244, SN54S240, SN54S241, SN54S244
SN74LS240, SN74LS241, SN74LS244, SN74S240, SN74S241, SN74S244
OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
SDLS144B – APRIL 1985 – REVISED FEBRUARY 2002
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
Hysteresis
(VT+ – VT–)
VCC = MIN,
VCC = MIN
VCC = MIN,
IOH = –3 mA
VCC = MIN,
IOH = MAX
VCC = MIN,
,
VIL = MAX
VCC = MAX,
VIL = MAX
VCC = MAX,
VIL = MAX
VCC = MAX,
VCC = MAX,
VCC = MAX,
VCC = MAX,
VIH = 2 V,
VIH = 2 V,
VIH = 2 V,
,
VIL = MAX,
VIL = 0.5 V,
IOL = 12 mA
IOL = 24 mA
VO = 2.7 V
VO = 0.4 V
TEST CONDITIONS†
II = –18 mA
0.2
2.4
2
0.4
0.4
3.4
SN54LS’
MIN TYP‡
MAX
–1.5
0.2
2.4
2
0.4
0.5
20
–20
0.1
20
–0.2
–40
Outputs high
ICC
VCC = MAX,
MAX
Out ut o en
Output open
Outputs low
Out uts
Outputs disabled
All
’LS240
’LS241, ’LS244
’LS240
’LS241, ’LS244
17
26
27
29
32
–225
27
44
46
50
54
–40
17
26
27
29
32
20
–20
0.1
20
–0.2
–225
27
44
46
50
54
mA
V
µA
µA
mA
µA
mA
mA
0.4
3.4
V
SN74LS’
MIN TYP‡
MAX
–1.5
UNIT
V
V
VOH
VOL
IOZH
IOZL
II
IIH
IIL
IOS§
VIH = 2 V,
VIH = 2 V,
VI = 7 V
VI = 2.7 V
VIL = 0.4 V
† For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
‡ All typical values are at VCC = 5 V, TA = 25°C.
§ Not more than one output should be shorted at a time, and duration of the short-circuit should not exceed one second.
switching characteristics, V
CC
= 5 V, T
A
= 25°C (see Figure 1)
PARAMETER
tPLH
tPHL
tPZL
tPZH
tPLZ
tPHZ
TEST CONDITIONS
RL = 667
Ω
Ω,
RL = 667
Ω
Ω,
RL = 667
Ω,
Ω
’LS240
MIN
TYP
9
CL = 45 pF
CL = 45 pF
F
CL = 5 pF
12
20
15
10
15
MAX
14
18
30
23
20
25
’LS241, ’LS244
MIN
TYP
12
12
20
15
10
15
MAX
18
18
30
23
20
25
UNIT
ns
ns
ns
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
7
TI [ TEXAS INSTRUMENTS ]
