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SN74LS244 Datasheet(PDF) 7 Page - Texas Instruments

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Part No. SN74LS244
Description  OCTAL BUFFERS AND LINE DRIVERS WITH 3-STATE OUTPUTS
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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 7 page
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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
7
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS†
SN54LS’
SN74LS’
UNIT
PARAMETER
TEST CONDITIONS†
MIN
TYP‡
MAX
MIN
TYP‡
MAX
UNIT
VIK
VCC = MIN,
II = –18 mA
–1.5
–1.5
V
Hysteresis
(VT+ – VT–)
VCC = MIN
0.2
0.4
0.2
0.4
V
VOH
VCC = MIN,
IOH = –3 mA
VIH = 2 V,
VIL = MAX,
2.4
3.4
2.4
3.4
V
VOH
VCC = MIN,
IOH = MAX
VIH = 2 V,
VIL = 0.5 V,
2
2
V
VOL
VCC = MIN,
VIH = 2 V,
IOL = 12 mA
0.4
0.4
V
VOL
CC
,
VIL = MAX
IH
,
IOL = 24 mA
0.5
V
IOZH
VCC = MAX,
VIL = MAX
VIH = 2 V,
VO = 2.7 V
20
20
µA
IOZL
VCC = MAX,
VIL = MAX
VIH = 2 V,
VO = 0.4 V
–20
–20
µA
II
VCC = MAX,
VI = 7 V
0.1
0.1
mA
IIH
VCC = MAX,
VI = 2.7 V
20
20
µA
IIL
VCC = MAX,
VIL = 0.4 V
–0.2
–0.2
mA
IOS§
VCC = MAX,
–40
–225
–40
–225
mA
Outputs high
All
17
27
17
27
V
MAX
Outputs low
’LS240
26
44
26
44
ICC
VCC = MAX,
Output open
Outputs low
’LS241, ’LS244
27
46
27
46
mA
Out ut oen
Outputs disabled
’LS240
29
50
29
50
Out uts disabled
’LS241, ’LS244
32
54
32
54
† 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, VCC = 5 V, TA = 25°C (see Figure 1)
PARAMETER
TEST CONDITIONS
’LS240
’LS241, ’LS244
UNIT
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
UNIT
tPLH
RL = 667 Ω
C45 pF
9
14
12
18
ns
tPHL
RL = 667 Ω,
CL = 45 pF
12
18
12
18
ns
tPZL
RL = 667 Ω
C45 F
20
30
20
30
ns
tPZH
RL = 667 Ω,
CL = 45 pF
15
23
15
23
ns
tPLZ
RL 667 Ω
CL 5 pF
10
20
10
20
ns
tPHZ
RL = 667 Ω,
CL = 5 pF
15
25
15
25
ns




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