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SN54LS243 Datasheet, PDF (4/14 Pages) Texas Instruments – QUADRUPLE BUS TRANSCEIVERS
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SN54LS243, SN74LS243
SDLS145A – APRIL 1985 – REVISED JULY 2008 ............................................................................................................................................................. www.ti.com
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
PARAMETER
VIK
A or B
Hysteresis (VT+ – VT–)
VOH
VOL
IOZH
IOZL
A or B
II
GAB or GBA
IIH
A inputs
IIL
B inputs
GAB or GBA
IOS
Outputs high
ICC
Outputs low
All outputs
disabled
TEST CONDITIONS(1)
VCC = MIN, II = –18 mA
VCC = MIN,
VCC = MIN, VIH = 2 V,
VCC = MIN,
VIL = MAX
VCC = MIN,
VIL = MAX,
VCC = MIN,
VIL = MAX,
VIH = 2 V,
VIH = 2 V,
VIH = 2 V,
VCC = MAX,
VCC = MAX,
VCC = MAX, VI = 0.4 V,
GAB and GBA at 0 V
VCC = MAX, VI = 0.4 V,
GAB and GBA at 4.5 V
VCC = MAX, VI = 0.4 V,
VCC = MAX
VIL = MAX,
IOH = –3 mA
VIL = 0.5 V,
IOH = MAX
IOL = 12 mA
IOL = 24 mA
VO = 2.7 V
VO = 0.4 V
VI = 5.5 V
VI = 7 V
VCC = MAX,
(3)
Outputs open,
SN54LS243
MIN TYP(2) MAX
–1.5
0.2
0.4
2.4
3.1
SN74LS243
MIN TYP(2) MAX
–1.5
0.2
0.4
UNIT
V
V
2.4
3.1
V
2
0.25 0.4
40
2
0.25 0.4
V
0.35 0.5
40 µA
–200
0.1
0.1
20
–200 µA
0.1
mA
0.1
20 µA
–0.2
–0.2
mA
–0.2
–0.2
–0.2
–0.2
–40
–225 –40
–225 mA
22 38
22 38
29 50
29 50 mA
32 54
32 54
(1) For conditions shown as MIN or MAX, use the appropriate value specified under "recommended operating conditions."
(2) All typical values are at VCC = 5 V, TA = 25°C.
(3) ICC is measured with transceivers eabled in one direction only, or with all transceivers disabled.
SWITCHING CHARACTERISTICS
VCC = 5 V, TA = 25°C
PARAMETER
TEST CONDITIONS
tPLH
tPHL
tPZL
RL = 667 Ω,
CL = 45 pF
tPZH
tPLZ
tPHZ
RL = 667 Ω,
CL = 5 pF
SN54LS243
MIN TYP
9
12
20
15
10
15
MAX
14
18
30
23
20
25
SN74LS243
MIN TYP MAX
12
18
12
18
20
30
15
23
10
20
15
25
UNIT
ns
ns
ns
ns
ns
ns
4
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