TOSHIBA TC74VHC257F

TC74VHC257F/FN/FT/FK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VHC257F,TC74VHC257FN,TC74VHC257FT,TC74VHC257FK
Quad 2-Channel Multiplexer (3-state)
Note:
The TC74VHC257 is an advanced high speed CMOS
MULTIPLEXER fabricated with silicon gate C2MOS technology.
It achieves the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
It is composed of four independent 2-channel multiplexers with
common SELECT and OUTPUT ENABLE ( 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.
An input protection circuit ensures that 0 to 5.5 V can be
applied to the input pins without regard to the supply voltage.
This device can be used to interface 5 V to 3 V systems and two
supply systems such as battery back up. This circuit prevents
device destruction due to mismatched supply and input voltages.
xxxFN (JEDEC SOP) is not available in
Japan.
TC74VHC257F
TC74VHC257FN
Features
•
High speed: tpd = 3.6 ns (typ.) at VCC = 5 V
•
Low power dissipation: ICC = 4 μA (max) at Ta = 25°C
•
High noise immunity: VNIH = VNIL = 28% VCC (min)
•
•
Power down protection is provided on all inputs.
Balanced propagation delays: tpLH ∼
− tpHL
•
Wide operating voltage range: VCC (opr) = 2 to 5.5 V
•
Low noise: VOLP = 0.8 V (max)
•
Pin and function compatible with 74ALS257
TC74VHC257FT
TC74VHC257FK
Weight
SOP16-P-300-1.27A
SOL16-P-150-1.27
TSSOP16-P-0044-0.65A
VSSOP16-P-0030-0.50
1
: 0.18 g (typ.)
: 0.13 g (typ.)
: 0.06 g (typ.)
: 0.02 g (typ.)
2007-10-01
TC74VHC257F/FN/FT/FK
Pin Assignment
IEC Logic Symbol
OE
SELECT
1
16
VCC
1A
2
15
OE
1B
3
14
4A
1Y
4
13
4B
2A
5
12
4Y
2B
6
11
3A
2Y
7
10
3B
GND
8
9
3Y
SELECT
1A
1B
2A
2B
3A
3B
4A
4B
(15)
(1)
(2)
(3)
(5)
(6)
(11)
(10)
(14)
(13)
EN
G1
1
MUX
(4)
1Y
1
(7)
2Y
(9)
3Y
(12)
4Y
(top view)
Truth Table
Inputs
Output
OE
SELECT
A
B
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
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TC74VHC257F/FN/FT/FK
System Diagram
SELECT
1A
1B
2A
1
2
4 1Y
3
5
7
2B
3A
6
11
9
3B
4A
10
OE
3Y
14
12
4B
2Y
13
4Y
15
Absolute Maximum Ratings (Note)
Characteristics
Symbol
Rating
Unit
Supply voltage range
VCC
−0.5 to 7.0
V
DC input voltage
VIN
−0.5 to 7.0
V
VOUT
−0.5 to VCC + 0.5
V
Input diode current
IIK
−20
mA
Output diode current
IOK
±20
mA
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
DC output voltage
Note:
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).
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TC74VHC257F/FN/FT/FK
Operating Ranges (Note)
Characteristics
Symbol
Rating
Unit
Supply voltage
VCC
2.0 to 5.5
V
Input voltage
VIN
0 to 5.5
V
VOUT
0 to VCC
V
−40 to 85
°C
Output voltage
Operating temperature
Topr
Input rise and fall time
0 to 100 (VCC = 3.3 ± 0.3 V)
dt/dv
ns/V
0 to 20 (VCC = 5 ± 0.5 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.
Electrical Characteristics
DC Characteristics
Characteristics
Test Condition
Symbol
VCC (V)
High-level input
voltage
VIH
―
Low-level input
voltage
VIL
―
High-level output
voltage
Low-level output
voltage
VOH
VOL
VIN
= VIH or
VIL
VIN
= VIH or
VIL
Ta =
−40 to 85°C
Ta = 25°C
2.0
Min
1.50
VCC ×
3.0 to 5.5
0.7
Typ.
Max
―
―
―
―
0.50
Min
1.50
VCC ×
0.7
―
―
―
―
―
3.0 to 5.5
―
―
VCC ×
0.3
―
VCC ×
0.3
2.0
1.9
2.0
―
1.9
―
3.0
2.9
3.0
―
2.9
―
4.5
4.4
4.5
―
4.4
―
IOH = −4 mA
3.0
2.58
―
―
2.48
―
IOH = −8 mA
4.5
3.94
―
―
3.80
―
2.0
―
0.0
0.1
―
0.1
3.0
―
0.0
0.1
―
0.1
IOL = 50 μA
V
0.50
2.0
IOH = −50 μA
Unit
Max
V
V
4.5
―
0.0
0.1
―
0.1
IOL = 4 mA
3.0
―
―
0.36
―
0.44
IOL = 8 mA
4.5
―
―
0.36
―
0.44
5.5
―
―
±0.25
―
±2.50
μA
VIN = VIH or VIL
V
3-state output
off-state current
IOZ
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
―
―
4.0
―
40.0
μA
VOUT = VCC or GND
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2007-10-01
TC74VHC257F/FN/FT/FK
AC Characteristics (input: tr = tf = 3 ns)
Characteristics
Test Condition
Symbol
VCC (V)
Propagation delay
time
tpLH
(A, B-Y)
tpHL
Propagation delay
time
tpLH
(SELECT-Y)
tpHL
tpZL
3-state output enable
time
tpZH
tpLZ
3-state output disable
time
tpHZ
CL (pF)
Min
Typ.
Max
Min
Max
15
―
5.8
9.3
1.0
11.0
50
―
8.3
12.8
1.0
14.5
15
―
3.6
5.9
1.0
7.0
50
―
5.1
7.9
1.0
9.0
15
―
7.0
11.0
1.0
13.0
50
―
9.5
14.5
1.0
16.5
15
―
4.0
6.8
1.0
8.0
50
―
5.5
8.8
1.0
10.0
15
―
6.7
10.5
1.0
12.5
50
―
9.2
14.0
1.0
16.0
15
―
3.6
6.8
1.0
8.0
50
―
5.1
8.8
1.0
10.0
3.3 ± 0.3
50
―
8.6
12.0
1.0
13.5
5.0 ± 0.5
50
―
5.7
7.9
1.0
9.0
3.3 ± 0.3
―
5.0 ± 0.5
3.3 ± 0.3
―
5.0 ± 0.5
3.3 ± 0.3
RL = 1 kΩ
5.0 ± 0.5
RL = 1 kΩ
Ta = −40 to
85°C
Ta = 25°C
Unit
ns
ns
ns
ns
Input capacitance
CIN
―
―
4
10
―
10
pF
Onput capacitance
COUT
―
―
6
―
―
―
pF
Power dissipation
capacitance
CPD
―
23
―
―
―
pF
(Note)
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/4 (per bit)
Noise Characteristics (input: tr = tf = 3 ns)
Characteristics
Test Condition
Symbol
Ta = 25°C
VCC (V)
Typ.
Max
Unit
Quiet output maximum dynamic VOL
VOLP
CL = 50 pF
5.0
0.3
0.8
V
Quiet output minimum dynamic VOL
VOLV
CL = 50 pF
5.0
−0.3
−0.8
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
Input Equivalent Circuit
INPUT
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2007-10-01
TC74VHC257F/FN/FT/FK
Package Dimensions
Weight: 0.18 g (typ.)
6
2007-10-01
TC74VHC257F/FN/FT/FK
Package Dimensions (Note)
Note:
This package is not available in Japan.
Weight: 0.13 g (typ.)
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2007-10-01
TC74VHC257F/FN/FT/FK
Package Dimensions
Weight: 0.06 g (typ.)
8
2007-10-01
TC74VHC257F/FN/FT/FK
Package Dimensions
Weight: 0.02 g (typ.)
9
2007-10-01
TC74VHC257F/FN/FT/FK
RESTRICTIONS ON PRODUCT USE
20070701-EN GENERAL
• The information contained herein is subject to change without notice.
• TOSHIBA is continually working to improve the quality and reliability of its products. Nevertheless, semiconductor
devices in general can malfunction or fail due to their inherent electrical sensitivity and vulnerability to physical
stress. It is the responsibility of the buyer, when utilizing TOSHIBA products, to comply with the standards of
safety in making a safe design for the entire system, and to avoid situations in which a malfunction or failure of
such TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified operating ranges as
set forth in the most recent TOSHIBA products specifications. Also, please keep in mind the precautions and
conditions set forth in the “Handling Guide for Semiconductor Devices,” or “TOSHIBA Semiconductor Reliability
Handbook” etc.
• The TOSHIBA products listed in this document are intended for usage in general electronics applications
(computer, personal equipment, office equipment, measuring equipment, industrial robotics, domestic appliances,
etc.).These TOSHIBA products are neither intended nor warranted for usage in equipment that requires
extraordinarily high quality and/or reliability or a malfunction or failure of which may cause loss of human life or
bodily injury (“Unintended Usage”). Unintended Usage include atomic energy control instruments, airplane or
spaceship instruments, transportation instruments, traffic signal instruments, combustion control instruments,
medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA products listed in his
document shall be made at the customer’s own risk.
• The products described in this document shall not be used or embedded to any downstream products of which
manufacture, use and/or sale are prohibited under any applicable laws and regulations.
• The information contained herein is presented only as a guide for the applications of our products. No
responsibility is assumed by TOSHIBA for any infringements of patents or other rights of the third parties which
may result from its use. No license is granted by implication or otherwise under any patents or other rights of
TOSHIBA or the third parties.
• Please contact your sales representative for product-by-product details in this document regarding RoHS
compatibility. Please use these products in this document in compliance with all applicable laws and regulations
that regulate the inclusion or use of controlled substances. Toshiba assumes no liability for damage or losses
occurring as a result of noncompliance with applicable laws and regulations.
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2007-10-01