TC74VHCT125,126AF/AFT/AFK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VHCT125AF,TC74VHCT125AFT,TC74VHCT125AFK
TC74VHCT126AF,TC74VHCT126AFT,TC74VHCT126AFK
TC74VHCT125AF/AFT/AFK
TC74VHCT126AF/AFT/AFK
Quad Bus Buffer
Quad Bus Buffer
The TC74VHCT125A/126A are high speed CMOS QUAD BUS
BUFFERs fabricated with silicon gate C2MOS technology.
They achieve the high speed operation similar to equivalent
Bipolar Shottky TTL while maintaining the CMOS low power
dissipation.
The TC74VHCT125A requires the 3-state control input G to
be set high to place the output into the high impedance state,
whereas the TC74VHCT126A requires the control input G to be
set low to place the output into high impedance.
The input voltage are compatible with TTL output voltage.
This device may be used as a level converter for interfacing
3.3 V to 5 V system.
Input protection and output circuit ensure that 0 to 5.5 V can
be applied to the input and output (Note) pins without regard to
the supply voltage. There structure prevents device detsruction
due to mismatched supply and input/output voltages such as
battery back up, hot board insertion, etc.
Note:
TC74VHCT125AF, TC74VHCT126AF
TC74VHCT125AFT, TC74VHCT126AFT
TC74VHCT125AFK, TC74VHCT126AFK
VCC = 0 V
Features
•
High speed: tpd = 3.8 ns (typ.) at VCC = 5 V
•
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
•
Compatible with TTL inputs: VIL = 0.8 V (max)
VIH = 2.0 V (min)
•
•
Power down protection is provided on all inputs and outputs.
Balanced propagation delays: tpLH ∼
− tpHL
•
Low noise: VOLP = 0.8 V (max)
•
Pin and function compatible with the 74 series
(74AC/HC/F/ALS/LS etc.) 125/126 types.
1
Weight
SOP14-P-300-1.27A:0.18 g (typ.)
TSSOP14-P-0044-0.65A:
0.06 g (typ.)
VSSOP14-P-0030-0.50:
0.02 g (typ.)
2012-02-29
TC74VHCT125,126AF/AFT/AFK
Pin Assignment
TC74VHCT125A
TC74VHCT126A
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
TC74VHCT125A
1G
1A
2G
2A
3G
3A
4G
4A
(1)
(2)
EN
TC74VHCT126A
(3)
(4)
(6)
(5)
(10)
(8)
(9)
(13)
(11)
(12)
(1)
1G
1Y
(2)
1A
2G
2Y
3Y
4Y
(3)
(4)
(6)
(5)
2A
3G
(10)
3A
4G
(13)
4A
EN
(8)
(9)
(11)
(12)
1Y
2Y
3Y
4Y
Truth Table
TC74VHCT125A
Inputs
TC74VHCT126A
Inputs
Output
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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TC74VHCT125,126AF/AFT/AFK
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 7.0
V
−0.5 to 7.0
(Note 2)
−0.5 to VCC + 0.5
(Note 3)
V
DC output voltage
VOUT
Input diode current
IIK
−20
Output diode current
IOK
±20
DC output current
IOUT
±25
mA
DC VCC/ground current
ICC
±50
mA
Power dissipation
PD
180
mW
Storage temperature
Tstg
−65 to 150
°C
mA
(Note 4)
mA
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: Output in off-state
Note 3: High or low state. IOUT absolute maximum rating must be observed.
Note 4: VOUT < GND, VOUT > VCC
Operating Ranges (Note 1)
Characteristics
Symbol
Rating
Unit
Supply voltage
VCC
4.5 to 5.5
V
Input voltage
VIN
0 to 5.5
V
Output voltage
VOUT
0 to 5.5
(Note 2)
0 to VCC
(Note 3)
V
Operating temperature
Topr
−40 to 85
°C
Input rise and fall time
dt/dv
0 to 20
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 VCC or GND.
Note 2: Output in off-state
Note 3: High or low state
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TC74VHCT125,126AF/AFT/AFK
Electrical Characteristics
DC Characteristics
Characteristics
Symbol
Ta =
−40 to 85°C
Ta = 25°C
Test Condition
VCC (V)
Min
Typ.
Max
Min
Max
Unit
High-level input
voltage
VIH
―
4.5 to 5.5
2.0
―
―
2.0
―
V
Low-level input
voltage
VIL
―
4.5 to 5.5
―
―
0.8
―
0.8
V
High-level output
voltage
VOH
VIN = VIH or
VIL
IOH = −50 μA
4.5
4.40
4.50
―
4.40
―
IOH = −8 mA
4.5
3.94
―
―
3.80
―
Low-level output
voltage
VOL
VIN = VIH or
VIL
IOL = 50 μA
4.5
―
0.0
0.1
―
0.1
IOL = 8 mA
4.5
―
―
0.36
―
0.44
0 to 5.5
―
―
±0.1
―
±1.0
μA
5.5
―
―
±0.25
―
±2.50
μA
5.5
―
―
4.0
―
40.0
μA
5.5
―
―
1.35
―
1.50
mA
0
―
―
0.5
―
5.0
μA
Input leakage
current
IIN
3-state output
off-state current
IOZ
VIN = 5.5 V or GND
ICC
Quiescent supply
current
Output leakage
current
ICCT
IOPD
VIN = VIH or VIL
VOUT = VCC or GND
VIN = VCC or GND
Per input: VIN = 3.4 V
Other input: VCC or GND
VOUT = 5.5 V
V
V
AC Characteristics (input: tr = tf = 3 ns)
Characteristics
Test Condition
Symbol
VCC (V)
Propagation delay
time
Output enable time
Output disable time
Output to output skew
Input capacitance
Output capacitance
Power dissipation
capacitance
tpLH
tpHL
tpZL
tpZH
tpLZ
tpHZ
tosLH
tosHL
―
5.0 ± 0.5
Ta =
−40 to 85°C
Ta = 25°C
CL (pF)
Min
Typ.
Max
Min
Max
15
―
3.8
5.5
1.0
6.5
50
―
5.3
7.5
1.0
8.5
15
―
3.6
5.1
1.0
6.0
50
―
5.1
7.1
1.0
8.0
Unit
ns
RL = 1 kΩ
5.0 ± 0.5
RL = 1 kΩ
5.0 ± 0.5
50
―
6.1
8.8
1.0
10.0
ns
5.0 ± 0.5
50
―
―
1.0
―
1.0
ns
(Note 1)
ns
CIN
―
―
4
10
―
10
pF
COUT
―
―
6
―
―
―
pF
TC74VHCT125A
―
14
―
―
―
(Note 2) TC74VHCT126A
―
15
―
―
―
CPD
pF
Note 1: Parameter guaranteed by design.
tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|
Note 2: 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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2012-02-29
TC74VHCT125,126AF/AFT/AFK
Noise Characteristics (input: tr = tf = 3 ns)
Characteristics
Symbol
Test Condition
Ta = 25°C
VCC (V)
Typ.
Limit
Unit
Quiet output maximum dynamic VOL
VOLP
CL = 50 pF
5.0
0.5
0.8
V
Quiet output minimum dynamic VOL
VOLV
CL = 50 pF
5.0
−0.5
−0.8
V
Minimum high level dynamic input voltage
VIHD
CL = 50 pF
5.0
―
2.0
V
Maximum low level dynamic input voltage
VILD
CL = 50 pF
5.0
―
0.8
V
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2012-02-29
TC74VHCT125,126AF/AFT/AFK
Package Dimensions
Weight: 0.18 g (typ.)
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2012-02-29
TC74VHCT125,126AF/AFT/AFK
Package Dimensions
Weight: 0.06 g (typ.)
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2012-02-29
TC74VHCT125,126AF/AFT/AFK
Package Dimensions
Weight: 0.02 g (typ.)
8
2012-02-29
TC74VHCT125,126AF/AFT/AFK
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all relevant TOSHIBA information, including without limitation, this document, the specifications, the data sheets and application notes
for Product and the precautions and conditions set forth in the "TOSHIBA Semiconductor Reliability Handbook" and (b) the
instructions for the application with which the Product will be used with or for. Customers are solely responsible for all aspects of their
own product design or applications, including but not limited to (a) determining the appropriateness of the use of this Product in such
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2012-02-29