TC74VHCV245FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74VHCV245FK
Octal Schmitt Bus Transceiver
The TC74VHCV245FK is an advanced high speed CMOS OCTAL BUS
TC74VHCV245FK
TRANSCEIVER fabricated with silicon gate CMOS technology.
It achieves the high speed operation similar to equivalent Bipolar Schottky
TTL while maintaining the CMOS low power dissipation.
It is intended for two-way asynchronous communication between data
busses. The direction of data transmission is determined by the level of the
DIR input.
The enable input ( G ) can be used to disable the device so that the busses
are effectively isolated.
Input pin and bus terminal have hysteresis between the positive-going and
Weight
negative-going thresholds. Thus the TC74VHCV245FK is capable of
VSSOP20-P-0030-0.50
: 0.03 g ( typ.)
squaring up transitions of slowly changing input signals and provides an
improved noise immunity.
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. These structure prevents device destruction due to mismatched supply and input/output voltages such as battery
back up, etc.
Note: Output in off-state.
Features (Note)
High speed: tpd = 3.8 ns (typ.) at VCC = 5 V
Low power dissipation: ICC = 2 μA (max) at Ta = 25°C
Wide operating voltage range: VCC (opr) = 1.8 V to 5.5 V
Ouput current: |IOH|/IOL = 16 mA (min) (VCC = 4.5 V)
Available in VSSOP (US)
Power-down protection provided on all inputs and outputs
Pin and function compatible with the 74 series
(74AC/VHC/HC/F/ALS/LS etc.) 245 type
Note: Do not apply a signal to any bus pins when it is in the output mode. Damage may result.
All floating (high impedance) bus pins must have their input levels fixed by means of pull-up or pull-down resistors.
Start of commercial production
2009-12
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Toshiba Electronic Devices & Storage Corporation
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TC74VHCV245FK
Pin Assignment
DIR
1
20
VCC
A1
2
19
A2
3
18
B1
A3
4
17
B2
A4
5
16
B3
A5
6
15
B4
A6
7
14
B5
A7
8
13
B6
A8
9
12
B7
GND 10
11
B8
(top view)
Truth Table
Inputs
Function
Output
G
DIR
A Bus
B Bus
L
L
Output
Input
A=B
L
H
Input
Output
B=A
H
X
Z
Z
X: Don’t care
Z: High impedance
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TC74VHCV245FK
Absolute Maximum Ratings (Note 1)
Characteristics
Symbol
Rating
Unit
Power supply voltage
VCC
−0.5 to 7.0
V
DC iInput voltage (DIR, G )
VIN
−0.5 to 7.0
V
DC bus I/O voltage
VI/O
Input diode current
IIK
Output diode current
IOK
DC output current
IOUT
±50
mA
Power dissipation
PD
180
mW
ICC/IGND
±100
mA
Tstg
−65 to 150
°C
DC VCC/ground current
Storage temperature
−0.5 to 7.0
(Note 2)
-0.5 to VCC + 0.5
(Note 3)
V
−50
mA
±50
(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: 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
Power supply voltage
VCC
1.8 to 5.5
V
iInput voltage (DIR, G )
VIN
0 to 5.5
V
Bus I/O voltage
VI/O
Operating temperature
Topr
−40 to 85
°C
Input rise and fall time
dt/dv
0 to 20 (VCC = 3.3 ± 0.3V)
0 to 1 (VCC = 5 ± 0.5V)
ms/V
0 to 5.5
(Note 2)
0 to VCC
(Note 3)
V
Note 1: The operating ranges are required to ensure the normal operation of the device. Unused inputs and bus inputs must
be tied to either VCC or GND. Please connect both bus inputs and the bus outputs with VCC or GND when the I/O of
the bus terminal changes by the function. In this case, please note that the output is not short-circuited.
Note 2: off-state
Note 3: High or low state
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TC74VHCV245FK
Electrical Characteristics
DC Characteristics
Characteristics
Positive threshold voltage
Negative threshold voltage
Hysteresis voltage
High-level output voltage
Low-level output voltage
Test Condition
Symbol
VP
VN
VH
VOH
VOL
VIN
= VIH or
VIL
VIN
= VIH or
VIL
Ta =
−40 to 85°C
Ta = 25°C
VCC (V)
Min
Typ.
Max
Min
Max
―
1.8
2.3
3.0
4.5
5.5
―
―
―
―
―
―
―
―
―
―
1.65
1.85
2.20
3.15
3.85
―
―
―
―
―
1.65
1.85
2.20
3.15
3.85
―
1.8
2.3
3.0
4.5
5.5
0.15
0.45
0.90
1.35
1.65
―
―
―
―
―
―
―
―
―
―
0.15
0.45
0.90
1.35
1.65
―
―
―
―
―
―
1.8
2.3
3.0
4.5
5.5
0.15
0.20
0.30
0.40
0.50
―
―
―
―
―
1.05
1.10
1.20
1.40
1.60
0.15
0.20
0.30
0.40
0.50
1.05
1.10
1.20
1.40
1.60
IOH = −50 μA
1.8
3.0
4.5
1.7
2.9
4.4
1.8
3.0
4.5
―
―
―
1.7
2.9
4.4
―
―
―
IOH = −8 mA
IOH = −16 mA
3.0
4.5
2.58
3.94
―
―
―
―
2.48
3.80
―
―
IOL = 50 μA
1.8
3.0
4.5
―
―
―
0.0
0.0
0.0
0.1
0.1
0.1
―
―
―
0.1
0.1
0.1
IOL = 8 mA
IOL = 16 mA
3.0
4.5
―
―
―
―
0.36
0.44
―
―
0.44
0.55
Unit
V
V
V
3-state output off-state
current
IOZ
VIN = VIH or VIL
VOUT = 0 to 5.5V
1.8 to 5.5
―
―
±0.5
―
±5.0
μA
Power-off leakage current
IOFF
VIN/VOUT = 5.5 V
0
―
―
0.5
―
5.0
μA
Input leakage current
IIN
VIN = 5.5 V or GND
0 to 5.5
―
―
±0.1
―
±1.0
μA
Quiescent supply current
ICC
VIN = VCC or GND
5.5
―
―
2.0
―
20.0
μA
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TC74VHCV245FK
AC Characteristics (input: tr = tf = 3 ns)
Characteristics
Test Condition
Symbol
CL (pF)
Min
Typ.
Max
Min
Max
15
―
5.9
13.0
1.0
15.0
50
―
8.7
15.9
1.0
18.0
15
―
4.6
8.4
1.0
10.0
50
―
6.9
11.9
1.0
13.5
15
―
3.8
5.5
1.0
6.5
50
―
5.4
7.5
1.0
8.5
15
―
7.0
19.9
1.0
22.0
50
―
9.6
22.7
1.0
26.0
15
―
5.3
13.2
1.0
15.5
50
―
7.4
16.7
1.0
19.0
15
―
4.1
8.5
1.0
10.0
50
―
5.7
10.6
1.0
12.0
2.5 ± 0.2
50
―
15.0
23.1
1.0
25.0
3.3 ± 0.3
50
―
11.6
15.8
1.0
18.0
5.0 ± 0.5
50
―
9.3
9.7
1.0
11.0
2.5 ± 0.2
50
―
―
2.0
―
2.0
3.3 ± 0.3
50
―
―
1.5
―
1.5
5.0 ± 0.5
50
―
―
1.0
―
1.0
VCC (V)
2.5± 0.2
Propagation delay
time
tpLH
tpHL
―
3.3 ± 0.3
5.0 ± 0.5
2.5 ± 0.2
3-state output enable
time
tpZL
tpZH
RL = 1 kΩ
3.3 ± 0.3
5.0 ± 0.5
3-state output disable
time
Output to output skew
tpLZ
tpHZ
tosLH
tosHL
RL = 1 kΩ
(Note1)
Ta =
−40 to 85°C
Ta = 25°C
Unit
ns
ns
ns
ns
Input capacitance
CIN
DIR, G
―
4
10
―
10
pF
Bus input capacitance
CI/O
An, Bn
―
6
―
―
―
pF
Power dissipation
capacitance
CPD
(Note2)
―
26
―
―
―
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/8 (per bit)
© 2019
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TC74VHCV245FK
Noise Characteristics (input: tr = tf = 3 ns)
Characteristics
Ta = 25°C
Test Condition
Symbol
VCC (V)
Typ.
Max
Unit
Quiet output maximum dynamic
VOL
VOLP
CL = 50 pF
3.3
5.0
0.5
1.0
―
―
V
Quiet output minimum dynamic
VOL
VOLV
CL = 50 pF
3.3
5.0
−0.1
−0.3
―
―
V
Minimum high level dynamic input
voltage
VIHD
CL = 50 pF
5.0
―
3.5
V
Maximum low level dynamic input
voltage
VILD
CL = 50 pF
5.0
―
1.5
V
© 2019
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TC74VHCV245FK
Package Dimensions
Weight: 0.03 g (typ.)
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TC74VHCV245FK
RESTRICTIONS ON PRODUCT USE
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complying with safety standards and for providing adequate designs and safeguards for their hardware, software and systems which
minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily injury or damage to
property, including data loss or corruption. Before customers use the Product, create designs including the Product, or incorporate the
Product into their own applications, customers must also refer to and comply with (a) the latest versions of 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 design or applications; (b) evaluating and determining the
applicability of any information contained in this document, or in charts, diagrams, programs, algorithms, sample application circuits, or any
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