TC74LCX257F/FT/FK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74LCX257F,TC74LCX257FT,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
TC74LCX257FT
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, TSSOP and VSSOP(US)
•
Power-down protection provided on all inputs and outputs
•
Pin and function compatible with the 74 series
TC74LCX257FK
(74AC/VHC/HC/F/ALS/LS etc.) 257 type
Weight
SOP16-P-300-1.27A
TSSOP16-P-0044-0.65A
VSSOP16-P-0030-0.50
1
: 0.18 g (typ.)
: 0.06 g (typ.)
: 0.02 g (typ.)
2012-02-29
TC74LCX257F/FT/FK
Pin Assignment (top view)
IEC Logic Symbol
SELECT
1
16
VCC
OE
1A
2
15
OE
SELECT
1B
3
14
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
(15)
(1)
(2)
(3)
(5)
(6)
(11)
(10)
(14)
(13)
EN
G1
1
1
MUX
(4)
(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
OE
1
2
4
3
1Y
5
7
6
2Y
11
9
10
3Y
14
12
13
4Y
15
2
2012-02-29
TC74LCX257F/FT/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
−0.5 to 7.0 (Note 2)
DC output voltage
VOUT
−0.5 to VCC + 0.5
V
(Note 3)
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
DC VCC/ground current
Storage temperature
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
Power supply voltage
VCC
Input voltage
VIN
Output voltage
VOUT
Output current
IOH/IOL
Rating
Unit
2.0 to 3.6
1.5 to 3.6 (Note 2)
0 to 5.5
V
0 to 5.5 (Note 3)
0 to VCC (Note 4)
±24
(Note 5)
±12
(Note 6)
Operating temperature
Topr
−40 to 85
Input rise and fall time
dt/dv
0 to 10
V
V
mA
°C
(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 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
3
2012-02-29
TC74LCX257F/FT/FK
Electrical Characteristics
DC Characteristics (Ta = −40 to 85°C)
Characteristics
Input voltage
Symbol
Test Condition
H-level
VIH
⎯
L-level
VIL
⎯
H-level
VOH
Min
Max
2.7 to 3.6
2.0
⎯
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
2.7 to 3.6
⎯
±5.0
μA
2.7 to 3.6
⎯
±5.0
μA
VIN/VOUT = 5.5 V
0
⎯
10.0
μA
VIN = VCC or GND
2.7 to 3.6
⎯
10.0
VIN/VOUT = 3.6 to 5.5 V
2.7 to 3.6
⎯
±10.0
VIH = VCC − 0.6 V
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
2.7
⎯
6.0
3.3 ± 0.3
1.5
5.5
2.7
⎯
⎯
3.3 ± 0.3
⎯
1.0
VIN = VIH or VIL
Output voltage
L-level
VOL
Input leakage current
IIN
3-state output OFF state current
IOZ
Power-off leakage current
IOFF
Quiescent supply current
ICC
Increase in Icc per input
ΔICC
VIN = VIH or VIL
VCC (V)
VIN = 0 to 5.5 V
VIN = VIH or VIL
VOUT = 0 to 5.5 V
Unit
V
V
μA
AC Characteristics (Ta = −40 to 85°C)
Characteristics
Symbol
Propagation delay time
(A, B-Y)
tpHL
Propagation delay time
(SELECT-Y)
tpHL
Output enable time
Output disable time
Output to output skew
Note:
tpLH
tpLH
tpZL
tpZH
tpLZ
tpHZ
Test Condition
VCC (V)
Figure 1, Figure 2
Figure 1, Figure 2
Figure 1, Figure 3
Figure 1, Figure 3
tosLH
tosHL
(Note)
Unit
ns
ns
ns
ns
ns
Parameter guaranteed by design.
(tosLH = |tpLHm − tpLHn|, tosHL = |tpHLm − tpHLn|)
4
2012-02-29
TC74LCX257F/FT/FK
Dynamic Switching Characteristics (Ta = 25°C, input: tr = tf = 2.5 ns, CL = 50 pF, RL = 500 Ω)
Characteristics
Test Condition
Symbol
VCC (V)
Typ.
Unit
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
Input capacitance
Output capacitance
Power dissipation capacitance
Note:
Symbol
Test Condition
CIN
⎯
3.3
7
pF
COUT
⎯
3.3
8
pF
3.3
25
pF
VCC (V)
fIN = 10 MHz
CPD
(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
tpLH
VOL
tpLH, tpHL
5
2012-02-29
TC74LCX257F/FT/FK
tr 2.5 ns
tf 2.5 ns
2.7 V
90%
1.5 V
Output Enable
( OE )
10%
tpLZ
GND
tpZL
3.0 V
Output (Y)
Low to Off to Low
1.5 V
tpHZ
VOL
+ 0.3 V
VOH − 0.3 V
Output (Y)
High to Off to High
VOL
tpZH
VOH
1.5 V
GND
Outputs
enabled
Figure 3
Outputs
disabled
Outputs
enabled
tpLZ, tpHZ, tpZL, tpZH
6
2012-02-29
TC74LCX257F/FT/FK
Package Dimensions
Weight: 0.18 g (typ.)
7
2012-02-29
TC74LCX257F/FT/FK
Package Dimensions
Weight: 0.06 g (typ.)
8
2012-02-29
TC74LCX257F/FT/FK
Package Dimensions
Weight: 0.02 g (typ.)
9
2012-02-29
TC74LCX257F/FT/FK
RESTRICTIONS ON PRODUCT USE
• Toshiba Corporation, and its subsidiaries and affiliates (collectively "TOSHIBA"), reserve the right to make changes to the information
in this document, and related hardware, software and systems (collectively "Product") without notice.
• This document and any information herein may not be reproduced without prior written permission from TOSHIBA. Even with
TOSHIBA's 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 other referenced documents; and (c) validating all operating parameters for
such designs and applications. TOSHIBA ASSUMES NO LIABILITY FOR CUSTOMERS' PRODUCT DESIGN OR APPLICATIONS.
• PRODUCT IS NEITHER INTENDED NOR WARRANTED FOR USE IN EQUIPMENTS OR SYSTEMS THAT REQUIRE
EXTRAORDINARILY HIGH LEVELS OF QUALITY AND/OR RELIABILITY, AND/OR A MALFUNCTION OR FAILURE OF WHICH
MAY CAUSE LOSS OF HUMAN LIFE, BODILY INJURY, SERIOUS PROPERTY DAMAGE AND/OR SERIOUS PUBLIC IMPACT
("UNINTENDED USE"). Except for specific applications as expressly stated in this document, Unintended Use includes, without
limitation, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equipment used for
automobiles, trains, ships and other transportation, traffic signaling equipment, equipment used to control combustions or explosions,
safety devices, elevators and escalators, devices related to electric power, and equipment used in finance-related fields. IF YOU USE
PRODUCT FOR UNINTENDED USE, TOSHIBA ASSUMES NO LIABILITY FOR PRODUCT. For details, please contact your
TOSHIBA sales representative.
• Do not disassemble, analyze, reverse-engineer, alter, modify, translate or copy Product, whether in whole or in part.
• Product shall not be used for or incorporated into any products or systems whose manufacture, use, or sale is prohibited under any
applicable laws or regulations.
• The information contained herein is presented only as guidance for Product use. No responsibility is assumed by TOSHIBA for any
infringement of patents or any other intellectual property rights of third parties that may result from the use of Product. No license to
any intellectual property right is granted by this document, whether express or implied, by estoppel or otherwise.
• ABSENT A WRITTEN SIGNED AGREEMENT, EXCEPT AS PROVIDED IN THE RELEVANT TERMS AND CONDITIONS OF SALE
FOR PRODUCT, AND TO THE MAXIMUM EXTENT ALLOWABLE BY LAW, TOSHIBA (1) ASSUMES NO LIABILITY
WHATSOEVER, INCLUDING WITHOUT LIMITATION, INDIRECT, CONSEQUENTIAL, SPECIAL, OR INCIDENTAL DAMAGES OR
LOSS, INCLUDING WITHOUT LIMITATION, LOSS OF PROFITS, LOSS OF OPPORTUNITIES, BUSINESS INTERRUPTION AND
LOSS OF DATA, AND (2) DISCLAIMS ANY AND ALL EXPRESS OR IMPLIED WARRANTIES AND CONDITIONS RELATED TO
SALE, USE OF PRODUCT, OR INFORMATION, INCLUDING WARRANTIES OR CONDITIONS OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE, ACCURACY OF INFORMATION, OR NONINFRINGEMENT.
• Do not use or otherwise make available Product or related software or technology for any military purposes, including without limitation,
for the design, development, use, stockpiling or manufacturing of nuclear, chemical, or biological weapons or missile technology
products (mass destruction weapons). Product and related software and technology may be controlled under the applicable export
laws and regulations including, without limitation, the Japanese Foreign Exchange and Foreign Trade Law and the U.S. Export
Administration Regulations. Export and re-export of Product or related software or technology are strictly prohibited except in
compliance with all applicable export laws and regulations.
• Please contact your TOSHIBA sales representative for details as to environmental matters such as the RoHS compatibility of Product.
Please use Product in compliance with all applicable laws and regulations that regulate the inclusion or use of controlled substances,
including without limitation, the EU RoHS Directive. TOSHIBA ASSUMES NO LIABILITY FOR DAMAGES OR LOSSES
OCCURRING AS A RESULT OF NONCOMPLIANCE WITH APPLICABLE LAWS AND REGULATIONS.
10
2012-02-29