TC74LCX125F/FT/FK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74LCX125F, TC74LCX125FT, TC74LCX125FK
Low-Voltage Quad Bus Buffer with 5-V Tolerant Inputs and Outputs
.
The TC74LCX125 is a high-performance CMOS quad bus
buffers. Designed for use in 3.3-V systems, it achieves high-speed
operation while maintaining the CMOS low power dissipation.
The device is designed for low-voltage (3.3 V) V
CC
applications,
but it could be used to interface to 5-V supply environment for
inputs.
This device requires the 3-state control input
OE
to be set
high to place the output into the high impedance state.
All inputs are equipped with protection circuits against static
discharge.
TC74LCX125F
Features
•
•
•
•
•
•
•
Low-voltage operation: V
CC
=
1.65 to 3.6 V
High-speed operation: t
pd
=
6.0 ns (max) (V
CC
=
3.0 to 3.6 V)
Ouput current: |I
OH
|/I
OL
=
24 mA (min) (V
CC
=
3.0 V)
Latch-up performance:
＞±500
mA
Available in JEITA SOP, TSSOP and VSSOP (US)
Power-down protection is provided on all inputs and outputs
Pin and function compatible with the 74 series
(74AC/VHC/HC/F/ALS/LS etc.) 125 type
TC74LCX125FT
TC74LCX125FK
Weight
SOP14-P-300-1.27A
TSSOP14-P-0044-0.65A
VSSOP14-P-0030-0.50
: 0.18 g (typ.)
: 0.06 g (typ.)
: 0.02 g (typ.)
Note: The Electrical Characteristics of V
CC
=1.8±0.15V is only applicable for products which manufactured
from January 2009 onward.
Start of commercial production
1994-10
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2014-03-01
TC74LCX125F/FT/FK
Pin Assignment
(top view)
IEC Logic Symbol
1
OE
1A
2
OE
2A
3
OE
3A
4
OE
4A
1
2
4
5
10
9
13
12
EN
1OE
1A
1Y
2OE
2A
2Y
GND
1
2
3
4
5
6
7
14
13
12
11
10
9
8
V
CC
3
6
8
11
1Y
2Y
3Y
4Y
4OE
4A
4Y
3OE
3A
3Y
Truth Table
Inputs
Outputs
OE
H
L
L
A
X
L
H
Y
Z
L
H
X: Don’t care
Z: High impedance
Absolute Maximum Ratings (Note 1)
Characteristics
Power supply voltage
DC input voltage
DC output voltage
Input diode current
Output diode current
DC output current
Power dissipation
DC V
CC
/ground current
Storage temperature
Symbol
V
CC
V
IN
V
OUT
I
IK
I
OK
I
OUT
P
D
I
CC
/I
GND
T
stg
Rating
−
0.5 to 7.0
−
0.5 to 7.0
−
0.5 to 7.0 (Note 2)
−
0.5 to V
CC
+
0.5
(Note 3)
−
50
±
50
±
50
Unit
V
V
V
mA
(Note 4)
mA
mA
mW
mA
°C
180
±
100
−
65 to 150
Note 1: Exceeding any of the absolute maximum ratings, even briefly, lead to deterioration in IC performance or
even destruction.
Using continuously under heavy loads (e.g. the application of high temperature/current/voltage and the
significant change in temperature, etc.) may cause this product to decrease in the reliability significantly
even if the operating range (i.e. operating temperature/current/voltage, etc.) are within the absolute
maximum ratings and the operating ranges.
Please design the appropriate reliability upon reviewing the Toshiba Semiconductor Reliability Handbook
(“Handling Precautions”/“Derating Concept and Methods”) and individual reliability data (i.e. reliability test
report and estimated failure rate, etc).
Note 2: Output in OFF state
Note 3: High or low state. I
OUT
absolute maximum rating must be observed.
Note 4: V
OUT
<
GND, V
OUT
>
V
CC
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2014-03-01
TC74LCX125F/FT/FK
Operating Ranges (Note 1)
Characteristics
Power supply voltage
Input voltage
Output voltage
Symbol
V
CC
V
IN
V
OUT
Rating
1.65 to 3.6
1.5 to 3.6
0 to 5.5
0 to 5.5
0 to V
CC
±
24
±
12
−
40 to 85
Unit
V
V
(Note 3)
(Note 4)
(Note 5)
(Note 6)
V
(Note 2)
Output current
Operating temperature
Input rise and fall time
I
OH
/I
OL
T
opr
dt/dv
mA
°C
0 to 10
(Note 7)
ns/V
Note 1: The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either V
CC
or GND.
Note 2: Data retention only
Note 3: Output in OFF state
Note 4: High or low state
Note 5: V
CC
=
3.0 to 3.6 V
Note 6: V
CC
=
2.7 to 3.0 V
Note 7: V
IN
=
0.8 to 2.0 V, V
CC
=
3.0 V
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2014-03-01
TC74LCX125F/FT/FK
Electrical Characteristics
DC Characteristics
(Ta
= −40
to 85°C)
Characteristics
Symbol
Test Condition
V
CC
(V)
Min
Max
⎯
⎯
⎯
Unit
1.65 to 2.3 V
CC
×
0.9
H-level
Input voltage
L-level
V
IL
⎯
V
IH
⎯
2.3 to 2.7
2.7 to 3.6
1.65 to 2.3
2.3 to 2.7
2.7 to 3.6
I
OH
= −
100
μ
A
I
OH
= −
4 mA
1.65 to 3.6
1.65
2.3
2.7
3.0
3.0
1.65 to 3.6
1.65
2.3
2.7
3.0
3.0
1.65 to 3.6
1.65 to 3.6
0
1.65 to 3.6
1.65 to 3.6
2.7 to 3.6
1.7
2.0
⎯
⎯
⎯
V
CC
×
0.1
0.7
0.8
⎯
⎯
⎯
⎯
⎯
⎯
V
V
CC
−
0.2
1.05
1.7
2.2
2.4
2.2
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
⎯
H-level
V
OH
V
IN
=
V
IH
or V
IL
I
OH
= −
8 mA
I
OH
= −
12 mA
I
OH
= −
18 mA
Output voltage
I
OH
= −
24 mA
I
OL
=
100
μ
A
I
OL
=
4 mA
L-level
V
OL
V
IN
=
V
IH
or V
IL
I
OL
=
8 mA
I
OL
=
12 mA
I
OL
=
16 mA
I
OL
=
24 mA
0.2
0.45
0.7
0.4
0.4
0.55
±
5.0
±
5.0
V
Input leakage current
3-state output OFF state current
Power-off leakage current
Quiescent supply current
Increase in I
CC
per input
I
IN
I
OZ
I
OFF
I
CC
Δ
I
CC
V
IN
=
0 to 5.5 V
V
IN
=
V
IH
or V
IL
V
OUT
=
0 to 5.5 V
V
IN
/V
OUT
=
5.5 V
V
IN
=
V
CC
or GND
V
IN
/V
OUT
=
3.6 to 5.5 V
V
IH
=
V
CC
−
0.6 V
μ
A
μ
A
μ
A
10.0
10.0
±
10.0
μ
A
500
4
2014-03-01
TC74LCX125F/FT/FK
AC Characteristics
(Ta
= −40
to 85°C)
Characteristics
Symbol
Test Condition
V
CC
(V)
1.8
±
0.15
Propagation delay time
t
pLH
t
pHL
Figure 1, Figure 2
2.5
±
0.2
2.7
3.3
±
0.3
1.8
±
0.15
Output enable time
t
pZL
t
PZH
Figure 1, Figure 3
2.5
±
0.2
2.7
3.3
±
0.3
1.8
±
0.15
Output disable time
t
pLZ
t
pHZ
Figure 1, Figure 3
2.5
±
0.2
2.7
3.3
±
0.3
Output to output skew
t
osLH
t
osHL
(Note)
2.7
3.3
±
0.3
Min
⎯
⎯
⎯
Max
20.0
7.5
6.5
6.0
30.0
15.0
8.0
7.0
28.0
14.0
7.0
6.0
⎯
Unit
ns
1.5
⎯
⎯
⎯
ns
1.5
⎯
⎯
⎯
ns
1.5
⎯
⎯
1.0
ns
Note:
Parameter guaranteed by design.
(t
osLH
=
|t
pLHm
−
t
pLHn
|, t
osHL
=
|t
pHLm
−
t
pHLn
|)
Dynamic Switching Characteristics
(Ta
=
25°C, input: t
r
=
t
f
=
2.5 ns, C
L
=
50 pF, R
L
=
500
Ω)
Characteristics
Quiet output maximum dynamic V
OL
Quiet output minimum dynamic V
OL
Symbol
V
OLP
|V
OLV
|
Test Condition
V
IH
=
3.3 V, V
IL
=
0 V
V
IH
=
3.3 V, V
IL
=
0 V
V
CC
(V)
3.3
3.3
Typ.
0.8
0.8
Unit
V
V
Capacitive Characteristics
(Ta
=
25°C)
Characteristics
Input capacitance
Output capacitance
Power dissipation capacitance
Symbol
C
IN
C
OUT
C
PD
f
IN
=
10 MHz
Test Condition
⎯
⎯
V
CC
(V)
3.3
3.3
(Note)
3.3
Typ.
7
8
25
Unit
pF
pF
pF
Note:
C
PD
is defined as the value of the internal equivalent capacitance which is calculated from the operating
current consumption without load.
Average operating current can be obtained by the equation:
I
CC (opr)
=
C
PD
½V
CC
½f
IN
+
I
CC
/4 (per gate)
5
2014-03-01
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