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)
PARAMETER
VIH
VIL
VIK
High-level input voltage
Low-level input voltage
Input clamp voltage
Hysteresis (VT+ – VT–)
VOH
High-level
High level output voltage
A or B
VCC = MIN,
VCC = MIN
VCC = MIN,
VIH = 2 V
V,
VIL = VIL(max)
VCC = MIN,
VIH = 2 V
V,
VIL = VIL(max)
VCC = MAX,
OE at 2 V
VCC = MAX,
OE at 2 V
VCC = MAX
VCC = MAX,
VCC = MAX,
VCC = MAX
VCC = MAX
Outputs open
II = –18 mA
0.2
IOH = –3 mA
IOH = MAX
IOL = 12 mA
IOL = 24 mA
VO = 2.7 V
VO = 0.4 V
VI = 5.5 V
VI = 7 V
VIH = 2.7 V
VIL = 0.4 V
–40
48
62
64
20
–200
0.1
0.1
20
–0.2
–225
70
90
95
40
48
62
64
2.4
2
0.4
0.4
3.4
TEST CONDITIONS†
SN54LS245
MIN
2
0.7
–1.5
0.2
2.4
2
0.4
V
0.5
20
–200
0.1
mA
0.1
20
–0.2
–225
70
90
95
mA
µA
mA
mA
µA
µA
0.4
3.4
V
TYP‡
MAX
SN74LS245
MIN
2
0.8
–1.5
TYP‡
MAX
UNIT
V
V
V
V
VOL
Low-level
Low level output voltage
Off-state output current,
high-level voltage applied
Off-state output current,
low-level voltage applied
Input current at
maximum input
voltage
A or B
DIR or OE
IOZH
IOZL
II
IIH
IIL
IOS
ICC
High-level input current
Low-level input current
Short-circuit output current§
Total, outputs high
Supply current
Total, outputs low
Outputs at high Z
† For conditions shown as MIN or MAX, use the appropriate values 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
Propagation delay time, low- to high-level output
Propagation delay time high to low level output
time, high- low-level
Output enable time to low level
Output enable time to high level
Output disable time from low level
Output disable time from high level
CL = 45 pF
pF,
CL = 45 pF
pF,
CL = 5 pF
pF,
TEST CONDITIONS
RL = 667
W
RL = 667
W
RL = 667
W
MIN
TYP
8
8
27
25
15
15
MAX
12
12
40
40
25
28
ns
UNIT
ns
ns
4
POST OFFICE BOX 655303
•
DALLAS, TEXAS 75265
TI [ TEXAS INSTRUMENTS ]
