TC74LCX257F/FK
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC74LCX257F, TC74LCX257FK
Low-Voltage Quad 2-Channel Multiplexer (3-state) with 5-V Tolerant Inputs and Outputs
The TC74LCX257 is a high-performance CMOS multiplexer. 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) VCC applications, but it
could be used to interface to 5-V supply environment for inputs.
It is composed of four independent 2-channel multiplexers with
common select and OE .
If OE is set low, the outputs are held in a high-impedance state.
When SELECT is set low, “A” data inputs are enabled. Conversely, when
SELECT is high, “B” data inputs are enabled.
All inputs are equipped with protection circuits against static
discharge.
TC74LCX257F
TC74LCX257FK
Features
•
•
•
Low-voltage operation: VCC = 2.0 to 3.6 V
High-speed operation: tpd = 6.0 ns (max) (VCC = 3.0 to 3.6 V)
Output current: |IOH|/IOL = 24 mA (min) (VCC = 3.0 V)
•
Latch-up performance: −500 mA
•
Available in JEITA SOP, VSSOP(US)
•
Power-down protection provided on all inputs and outputs
•
Pin and function compatible with the 74 series
Weight
SOP16-P-300-1.27A
VSSOP16-P-0030-0.50
: 0.18 g (typ.)
: 0.02 g (typ.)
(74AC/VHC/HC/F/ALS/LS etc.) 257 type
Start of commercial production
1995-02
© 2018
Toshiba Electronic Devices & Storage Corporation
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2018-08-02
TC74LCX257F/FK
Pin Assignment (top view)
IEC Logic Symbol
(15)
SELECT
1
16
1A
2
15
1B
3
14
VCC
SELECT
4A
1Y
4
13
4B
2A
5
12
4Y
2B
6
11
3A
2Y
7
10
3B
GND
8
9
3Y
1A
1B
2A
2B
3A
3B
4A
4B
(1)
(2)
(3)
(5)
(6)
(11)
(10)
(14)
(13)
EN
G1
MUX
(4)
1
(7)
(9)
(12)
1Y
2Y
3Y
4Y
Truth Table
Inputs
Outputs
OE
SELECT
A
B
Y
H
X
X
X
Z
L
L
L
X
L
L
L
H
X
H
L
H
X
L
L
L
H
X
H
H
X: Don’t care
Z: High impedance
System Diagram
SELECT
1A
1B
2A
2B
3A
3B
4A
4B
1
2
3
4
1Y
5
6
7
2Y
11
10
9
3Y
14
13
12
4Y
15
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Toshiba Electronic Devices & Storage Corporation
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TC74LCX257F/FK
Absolute Maximum Ratings (Note 1)
Characteristics
Symbol
Rating
Unit
Power supply voltage
VCC
−0.5 to 7.0
V
DC input voltage
VIN
−0.5 to 7.0
V
DC output voltage
VOUT
Input diode current
IIK
−50
Output diode current
IOK
±50
DC output current
IOUT
±50
mA
Power dissipation
PD
180
mW
ICC/IGND
±100
mA
Tstg
−65 to 150
°C
−0.5 to 7.0 (Note 2)
DC VCC/ground current
Storage temperature
−0.5 to VCC + 0.5
(Note 3)
V
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
2.0 to 3.6
Power supply voltage
VCC
Input voltage
VIN
V
1.5 to 3.6 (Note 2)
0 to 5.5
V
0 to 5.5 (Note 3)
Output voltage
Output current
VOUT
IOH/IOL
Operating temperature
Topr
Input rise and fall time
dt/dv
V
0 to VCC (Note 4)
±24
(Note 5)
±12
(Note 6)
mA
−40 to 85
0 to 10 (Note 7)
°C
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: Data retention only
Note 3: Output in OFF state
Note 4: High or low state
Note 5: VCC = 3.0 to 3.6 V
Note 6: VCC = 2.7 to 3.0 V
Note 7: VIN = 0.8 to 2.0 V, VCC = 3.0 V
© 2018
Toshiba Electronic Devices & Storage Corporation
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TC74LCX257F/FK
Electrical Characteristics
DC Characteristics (Ta = −40 to 85°C)
Characteristics
Symbol
Test Condition
Min
Max
Unit
VCC (V)
H-level
VIH
2.7 to 3.6
2.0
L-level
VIL
2.7 to 3.6
0.8
IOH = −100 µA
2.7 to 3.6
VCC
−0.2
IOH = −12 mA
2.7
2.2
IOH = −18 mA
3.0
2.4
IOH = −24 mA
3.0
2.2
IOL = 100 µA
2.7 to 3.6
0.2
IOL = 12 mA
2.7
0.4
IOL = 16 mA
3.0
0.4
IOL = 24 mA
3.0
0.55
Input voltage
H-level
VOH
VIN = VIH or VIL
Output voltage
L-level
VOL
VIN = VIH or VIL
V
V
IIN
VIN = 0 to 5.5 V
2.7 to 3.6
±5.0
µA
3-state output OFF state current
IOZ
VIN = VIH or VIL
VOUT = 0 to 5.5 V
2.7 to 3.6
±5.0
µA
Power-off leakage current
IOFF
VIN/VOUT = 5.5 V
0
10.0
µA
10.0
ICC
VIN = VCC or GND
2.7 to 3.6
Quiescent supply current
VIN/VOUT = 3.6 to 5.5 V
2.7 to 3.6
±10.0
VIH = VCC − 0.6 V (per 1 input)
2.7 to 3.6
500
Min
Max
2.7
6.5
3.3 ± 0.3
1.5
6.0
2.7
8.5
3.3 ± 0.3
1.5
7.0
2.7
8.5
3.3 ± 0.3
1.5
7.0
Input leakage current
Increase in ICC per input
∆ICC
µA
AC Characteristics (Ta = −40 to 85°C)
Characteristics
Symbol
Test Condition
Unit
VCC (V)
Propagation delay time
(A, B-Y)
tpLH
tpHL
Figure 1, Figure 2
Propagation delay time
(SELECT-Y)
tpLH
tpHL
Figure 1, Figure 2
Output enable time
tpZL
tpZH
Figure 1, Figure 3
tpLZ
tpHZ
Figure 1, Figure 3
Output disable time
Output to output skew
Note:
tosLH
tosHL
(Note)
ns
ns
ns
2.7
6.0
3.3 ± 0.3
1.5
5.5
2.7
3.3 ± 0.3
1.0
ns
ns
Parameter guaranteed by design.
(tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|)
© 2018
Toshiba Electronic Devices & Storage Corporation
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TC74LCX257F/FK
Dynamic Switching Characteristics (Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 Ω)
Characteristics
Test Condition
Symbol
Typ.
Unit
VCC (V)
Quiet output maximum dynamic VOL
VOLP
VIH = 3.3 V, VIL = 0 V
3.3
0.8
V
Quiet output minimum dynamic VOL
|VOLV|
VIH = 3.3 V, VIL = 0 V
3.3
0.8
V
Typ.
Unit
Capacitive Characteristics (Ta = 25°C)
Characteristics
Test Condition
Symbol
VCC (V)
Input capacitance
Output capacitance
Power dissipation capacitance
Note:
CIN
3.3
7
pF
COUT
3.3
8
pF
3.3
25
pF
CPD
fIN = 10 MHz
(Note)
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
AC Test Circuit
RL
Switch
Parameter
Switch
tpLH, tpHL
Open
tpLZ, tpZL
6.0 V
tpHZ, tpZH
GND
RL
Measure
CL
Output
Open
6.0 V
GND
CL = 50 pF
RL = 500 Ω
Figure 1
AC Waveform
tr 2.5 ns
tf 2.5 ns
2.7 V
90%
1.5 V
Input
10%
GND
VOH
Non-Inverting
Output
1.5 V
tpLH
tpHL
VOL
VOH
Inverting
Output
1.5 V
tpHL
Figure 2
© 2018
Toshiba Electronic Devices & Storage Corporation
tpLH
VOL
tpLH, tpHL
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2018-08-02
TC74LCX257F/FK
tr 2.5 ns
tf 2.5 ns
2.7 V
90%
1.5 V
Output Enable
(
)
10%
tpLZ
GND
tpZL
3.0 V
Output (Y)
Low to Off to Low
1.5 V
tpHZ
VOL
+ 0.3 V
VOL
tpZH
VOH
VOH − 0.3 V
Output (Y)
High to Off to High
1.5 V
GND
Outputs
enabled
Figure 3
© 2018
Toshiba Electronic Devices & Storage Corporation
Outputs
disabled
Outputs
enabled
tpLZ, tpHZ, tpZL, tpZH
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TC74LCX257F/FK
Package Dimensions
Weight: 0.18 g (typ.)
© 2018
Toshiba Electronic Devices & Storage Corporation
7
2018-08-02
TC74LCX257F/FK
Package Dimensions
Weight: 0.02 g (typ.)
© 2018
Toshiba Electronic Devices & Storage Corporation
8
2018-08-02
TC74LCX257F/FK
RESTRICTIONS ON PRODUCT USE
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Hardware, software and systems described in this document are collectively referred to as “Product”.
• TOSHIBA reserves the right to make changes to the information in this document and related Product without notice.
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written permission, reproduction is permissible only if reproduction is without alteration/omission.
• Though TOSHIBA works continually to improve Product's quality and reliability, Product can malfunction or fail. Customers are responsible for
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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