Datasheet
SN54ABT126, SN74ABT126
QUADRUPLE BUS BUFFER GATES
WITH 3-STATE OUTPUTS
SCBS183H − FEBRUARY 1991 − REVISED MAY 2003
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 4)
SN54ABT126 SN74ABT126
UNIT
MIN MAX MIN MAX
UNIT
V
CC
Supply voltage 4.5 5.5 4.5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.8 0.8 V
V
I
Input voltage 0 V
CC
0 V
CC
V
I
OH
High-level output current −24 −32 mA
I
OL
Low-level output current 48 64 mA
Δt/Δv Input transition rise or fall rate 10 10 ns/V
Δt/ΔV
CC
Power-up ramp rate 200 200 μs/V
T
A
Operating free-air temperature −55 125 −40 85 °C
NOTE 4: All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
T
A
= 25°C SN54ABT126 SN74ABT126
UNIT
PARAMETER TEST CONDITIONS
MIN TYP
†
MAX MIN MAX MIN MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= −18 mA −1.2 −1.2 −1.2 V
V
CC
= 4.5 V, I
OH
= −3 mA 2.5 2.5 2.5
V
V
CC
= 5 V, I
OH
= −3 mA 3 3 3
V
V
OH
V 45V
I
OH
= −24 mA 2 2
V
V
CC
= 4.5 V
I
OH
= −32 mA 2* 2
V
V 45V
I
OL
= 48 mA 0.55 0.55
V
V
OL
V
CC
= 4.5 V
I
OL
= 64 mA 0.55* 0.55
V
V
hys
100 mV
I
I
V
CC
= 0 to 5.5 V, V
I
= V
CC
or GND ±1 ±1 ±1 μA
I
OZPU
V
CC
= 0 to 2.1 V, V
O
= 0.5 V to 2.7 V, OE = X
‡
±50 ±50 ±50 μA
I
OZPD
V
CC
= 2.1 V to 0, V
O
= 0.5 V to 2.7 V, OE = X
‡
±50 ±50 ±50 μA
I
OZH
V
CC
= 2.1 V to 5.5 V, V
O
= 2.7 V, OE ≤ 0.8 V 10 10 10 μA
I
OZL
V
CC
= 2.1 V to 5.5 V, V
O
= 0.5 V, OE ≤ 0.8 V −10 −10 −10 μA
I
off
V
CC
= 0, V
I
or V
O
≤ 4.5 V ±100 ±100 μA
I
CEX
V
CC
= 5.5 V, V
O
= 5.5 V Outputs high 50 50 50 μA
I
O
§
V
CC
= 5.5 V, V
O
= 2.5 V −50 −100 −200 −50 −200 −50 −200 mA
V 55V I 0
Outputs high 1 250 250 250 μA
I
CC
V
CC
= 5.5 V, I
O
= 0,
V
I
=V
CC
or GND
Outputs low 24 30 30 30 mA
I
CC
V
I
=
V
CC
or
GND
Outputs disabled 0.5 250 250 250 μA
ΔI
¶
V
CC
= 5.5 V,
One input at34V
Outputs enabled 1.5 1.5 1.5 mA
ΔI
CC
¶
One input at 3.4 V,
Other inputs at V
CC
or GND
Outputs disabled 50 50 50 μA
C
i
V
I
= 2.5 V or 0.5 V 3 pF
C
o
V
O
= 2.5 V or 0.5 V 7 pF
* On products compliant to MIL-PRF-38535, this parameter does not apply.
†
All typical values are at V
CC
= 5 V.
‡
For V
CC
between 2.1 V and 4 V, OE should be less than or equal to 0.5 V to ensure a low state.
§
Not more than one output should be tested at a time, and the duration of the test should not exceed one second.
¶
This is the increase in supply current for each input that is at the specified TTL voltage level, rather than V
CC
or GND.
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design phase of development. Characteristic data and other
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change or discontinue these products without notice.