SN54LS245, SN74LS245
OCTAL BUS TRANSCEIVERS
WITH 3-STATE OUTPUTS
SDLS146A – OCTOBER 1976 – REVISED FEBRUARY 2002
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
SN54LS245
SN74LS245
†
PARAMETER
TEST CONDITIONS
UNIT
‡
‡
MIN TYP
MAX
MIN TYP
MAX
V
V
V
High-level input voltage
Low-level input voltage
Input clamp voltage
2
2
V
V
V
V
IH
0.7
0.8
IL
V
V
= MIN,
= MIN
= MIN,
I = –18 mA
–1.5
–1.5
IK
CC
CC
CC
I
Hysteresis (V – V
T+
)
T–
A or B
0.2
2.4
0.4
3.4
0.2
2.4
0.4
3.4
V
V
V
I
I
I
I
= –3 mA
= MAX
OH
OH
OL
OL
V
V
High-level output voltage
Low-level output voltage
V
V
= 2 V,
= V
OH
IH
IL
2
2
IL(max)
V
V
V
= MIN,
= 12 mA
= 24 mA
0.4
0.4
0.5
CC
IH
IL
= 2 V,
= V
OL
IL(max)
Off-state output current,
high-level voltage applied
V
= MAX,
CC
I
I
V
= 2.7 V
= 0.4 V
20
20
µA
µA
OZH
O
O
OE at 2 V
Off-state output current,
low-level voltage applied
V
= MAX,
CC
OE at 2 V
V
–200
–200
OZL
Input current at
maximum input
voltage
A or B
DIR or OE
V = 5.5 V
I
0.1
0.1
0.1
0.1
I
I
V
CC
= MAX
mA
V = 7 V
I
I
I
I
High-level input current
Low-level input current
Short-circuit output current
V
V
V
= MAX,
= MAX,
= MAX
V
= 2.7 V
= 0.4 V
20
–0.2
–225
70
20
–0.2
–225
70
µA
mA
mA
IH
CC
CC
CC
IH
IL
V
IL
§
–40
40
OS
Total, outputs high
Total, outputs low
Outputs at high Z
48
62
64
48
62
64
I
Supply current
V
CC
= MAX
Outputs open
90
90
mA
CC
95
95
†
‡
§
For conditions shown as MIN or MAX, use the appropriate values specified under recommended operating conditions.
All typical values are at V = 5 V, T = 25°C.
Not more than one output should be shorted at a time, and duration of the short circuit should not exceed one second.
CC
A
switching characteristics, V
= 5 V, T = 25°C (see Figure 1)
A
CC
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
t
t
t
t
t
t
Propagation delay time, low- to high-level output
Propagation delay time, high- to low-level output
Output enable time to low level
8
8
12
12
40
40
25
28
PLH
PHL
PZL
PZH
PLZ
PHZ
C
C
= 45 pF,
= 45 pF,
= 5 pF,
R
R
R
= 667
= 667
= 667
ns
L
L
L
L
L
27
25
15
15
ns
ns
Output enable time to high level
Output disable time from low level
C
L
Output disable time from high level
4
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