TC74AC125P/F/FT,126P/F
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74AC125P,TC74AC125F,TC74AC125FT
TC74AC126P,TC74AC126F
TC74AC125P/F/FT
TC74AC126P/F
Quad Bus Buffer
Quad Bus Buffer
TC74AC125P, TC74AC126P
The TC74AC125/126 are advanced high speed CMOS QUAD
BUS BUFFERs fabricated with silicon gate and double-layer
metal wiring C2MOS technology.
They achieve the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
The TC74AC125 requires the 3-state control input G to be set
high to place the output into the high impedance state, whereas
the TC74AC126 requires the control input to be set low to place
the output into high impedance.
All inputs are equipped with protection circuits against static
discharge or transient excess voltage.
TC74AC125F, TC74AC126F
Features
•
High speed: tpd = 4.0 ns (typ.) at VCC = 5 V
•
Low power dissipation: ICC = 8 μA (max) at Ta = 25°C
•
High noise immunity: VNIH = VNIL = 28% VCC (min)
•
Symmetrical output impedance: |IOH| = IOL = 24 mA (min)
•
Capability of driving 50 Ω
transmission lines.
Balanced propagation delays: tpLH ∼
− tpHL
•
Wide operating voltage range: VCC (opr) = 2 to 5.5 V
•
Pin and function compatible with 74F125/126
TC74AC125FT
Weight
DIP14-P-300-2.54
SOP14-P-300-1.27A
TSSOP14-P-0044-0.65A
1
: 0.96 g (typ.)
: 0.18 g (typ.)
: 0.06 g (typ.)
2012-02-29
TC74AC125P/F/FT,126P/F
Pin Assignment
TC74AC125
TC74AC126
1G
1
14
VCC
1G
1
14
VCC
1A
2
13
4G
1A
2
13
4G
1Y
3
12
4A
1Y
3
12
4A
2G
4
11
4Y
2G
4
11
4Y
2A
5
10
3G
2A
5
10
3G
2Y
6
9
3A
2Y
6
9
3A
GND
7
8
3Y
GND
7
8
3Y
(top view)
(top view)
IEC Logic Symbol
TC74AC125
1G
1A
2G
2A
3G
3A
4G
4A
(1)
(2)
EN
TC74AC126
(3)
(4)
(6)
(5)
(10)
(8)
(9)
(13)
(11)
(12)
1Y
2Y
3Y
4Y
1G
(1)
1A
2G
(4)
(2)
(3)
(6)
(5)
2A
3G
(10)
3A
4G
(13)
4A
EN
(8)
(9)
(11)
(12)
1Y
2Y
3Y
4Y
Truth Table
TC74AC125
Inputs
TC74AC126
Output
Inputs
Output
G
A
Y
G
A
Y
H
X
Z
L
X
Z
L
L
L
H
L
L
L
H
H
H
H
H
X: Don’t care
X: Don’t care
Z: High impedance
Z: High impedance
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TC74AC125P/F/FT,126P/F
Absolute Maximum Ratings (Note 1)
Characteristics
Symbol
Rating
Unit
Supply voltage range
VCC
−0.5 to 7.0
V
DC input voltage
VIN
−0.5 to VCC + 0.5
V
VOUT
−0.5 to VCC + 0.5
V
Input diode current
IIK
±20
mA
Output diode current
IOK
±50
mA
DC output current
IOUT
±50
mA
DC VCC/ground current
ICC
±100
mA
Power dissipation
PD
500 (DIP) (Note 2)/180 (SOP/TSSOP)
mW
Storage temperature
Tstg
−65 to 150
°C
DC output voltage
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 conditions (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: 500 mW in the range of Ta = −40 to 65°C. From Ta = 65 to 85°C a derating factor of −10 mW/°C should be
applied up to 300 mW.
Operating Ranges (Note)
Characteristics
Symbol
Rating
Unit
Supply voltage
VCC
2.0 to 5.5
V
Input voltage
VIN
0 to VCC
V
VOUT
0 to VCC
V
Operating temperature
Topr
−40 to 85
°C
Input rise and fall time
dt/dV
Output voltage
Note:
0 to 100 (VCC = 3.3 ± 0.3 V)
0 to 20 (VCC = 5 ± 0.5 V)
ns/V
The operating ranges must be maintained to ensure the normal operation of the device.
Unused inputs must be tied to either VCC or GND.
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TC74AC125P/F/FT,126P/F
Electrical Characteristics
DC Characteristics
Test Condition
Characteristics
High-level input
voltage
Low-level input
voltage
Symbol
―
VIH
―
VIL
IOH = −50 μA
High-level output
voltage
VOH
VIH or
VIL
IOH = −4 mA
IOH = −24 mA
IOH = −75 mA
(Note)
IOL = 50 μA
Low-level output
voltage
VOL
VIH or
VIL
IOL = 12 mA
IOL = 24 mA
IOL = 75 mA
(Note)
VIN = VIH or VIL
Ta =
−40 to 85°C
Ta = 25°C
Unit
VCC
(V)
Min
Typ.
Max
Min
Max
2.0
1.50
―
―
1.50
―
3.0
2.10
―
―
2.10
―
5.5
3.85
―
―
3.85
―
2.0
―
―
0.50
―
0.50
3.0
―
―
0.90
―
0.90
5.5
―
―
1.65
―
1.65
2.0
1.9
2.0
―
1.9
―
3.0
2.9
3.0
―
2.9
―
4.5
4.4
4.5
―
4.4
―
3.0
2.58
―
―
2.48
―
4.5
3.94
―
―
3.80
―
5.5
―
―
―
3.85
―
2.0
―
0.0
0.1
―
0.1
3.0
―
0.0
0.1
―
0.1
4.5
―
0.0
0.1
―
0.1
3.0
―
―
0.36
―
0.44
4.5
―
―
0.36
―
0.44
5.5
―
―
―
―
1.65
5.5
―
―
±0.5
―
±5.0
μA
V
V
V
V
3-state output
off-state current
IOZ
Input leakage
current
IIN
VIN = VCC or GND
5.5
―
―
±0.1
―
±1.0
μA
Quiescent supply
current
ICC
VIN = VCC or GND
5.5
―
―
8.0
―
80.0
μA
Note:
VOUT = VCC or GND
This spec indicates the capability of driving 50 Ω transmission lines.
One output should be tested at a time for a 10 ms maximum duration.
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2012-02-29
TC74AC125P/F/FT,126P/F
AC Characteristics (CL = 50 pF, RL = 500 Ω, input: tr = tf = 3 ns)
Characteristics
Propagation delay
time
Output enable time
Output disable time
Input capacitance
Output capacitance
Power dissipation
capacitance
Note:
Symbol
tpLH
tpHL
tpZL
tpZH
tpLZ
tpHZ
Test Condition
―
―
―
Ta =
−40 to 85°C
Ta = 25°C
VCC (V)
Min
Typ.
Max
Min
Max
3.3 ± 0.3
―
6.4
10.5
1.0
12.0
5.0 ± 0.5
―
4.7
7.0
1.0
8.0
3.3 ± 0.3
―
7.1
12.3
1.0
14.0
5.0 ± 0.5
―
5.0
7.9
1.0
9.0
3.3 ± 0.3
―
5.1
8.8
1.0
10.0
5.0 ± 0.5
―
4.6
6.6
1.0
7.5
Unit
ns
ns
ns
CIN
―
―
5
10
―
10
pF
COUT
―
―
10
―
―
―
pF
―
24
―
―
―
pF
(Note)
CPD
CPD 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:
ICC (opr) = CPD·VCC·fIN + ICC/4 (per gate)
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TC74AC125P/F/FT,126P/F
Package Dimensions
Weight: 0.96 g (typ.)
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2012-02-29
TC74AC125P/F/FT,126P/F
Package Dimensions
Weight: 0.18 g (typ.)
7
2012-02-29
TC74AC125P/F/FT,126P/F
Package Dimensions
Weight: 0.06 g (typ.)
8
2012-02-29
TC74AC125P/F/FT,126P/F
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2012-02-29