TC74VHC157F/FT/FK
TOSHIBA CMOS Digital Integrated Circuit
Silicon Monolithic
TC74VHC157F,TC74VHC157FT,TC74VHC157FK
Quad 2-Channel Multiplexer
TC74VHC157F
The TC74VHC157 is an advanced high speed CMOS QUAD
2-CHANNEL MULTIPLEXER fabricated with silicon gate
C
2
MOS technology.
It achieves the high speed operation similar to equivalent
Bipolar Schottky TTL while maintaining the CMOS low power
dissipation.
It consists of four 2-input digital multiplexers with common
select and strobe inputs.
When the
STROBE
input is held “H” level, selection of data is
inhibited and all the outputs become “L” level.
The SELECT decoding determines whether the A or B inputs
get routed to their corresponding Y outputs.
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 on
two supply systems such as battery back up. This circuit prevents
device destruction due to mismatched supply and input voltages.
TC74VHC157FT
Features
•
•
•
•
•
•
•
•
High speed: t
pd
= 4.1 ns (typ.) at V
CC
= 5 V
Low power dissipation: I
CC
= 4
μA
(max) at Ta = 25°C
High noise immunity: V
NIH
= V
NIL
= 28% V
CC
(min)
Power down protection is provided on all inputs.
∼
Balanced propagation delays: t
pLH
−
t
pHL
Wide operating voltage range: V
CC (opr)
= 2 V to 5.5 V
Low noise: V
OLP
= 0.8 V (max)
Pin and function compatible with 74ALS157
TC74VHC157FK
Weight
SOP16-P-300-1.27A
TSSOP16-P-0044-0.65A
VSSOP16-P-0030-0.50
: 0.18 g (typ.)
: 0.06 g (typ.)
: 0.02 g (typ.)
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TC74VHC157F/FT/FK
System Diagram
2
φ
A
1A
4 1Y
1B
3
φ
B
2A
5
φ
A
φ
B
7
2Y
2B 6
11
3A
φ
A
9
3Y
3B
10
φ
B
4A
14
φ
A
12
4Y
4B
13
φ
B
SELECT
1
φ
A
φ
B
ST
15
Absolute Maximum Ratings (Note)
Characteristics
Supply voltage range
DC input voltage
DC output voltage
Input diode current
Output diode current
DC output current
DC V
CC
/ground current
Power dissipation
Storage temperature
Symbol
V
CC
V
IN
V
OUT
I
IK
I
OK
I
OUT
I
CC
P
D
T
stg
Rating
−0.5
to 7.0
−0.5
to 7.0
−0.5
to V
CC
+ 0.5
−20
±20
±25
±50
180
−65
to 150
Unit
V
V
V
mA
mA
mA
mA
mW
°C
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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TC74VHC157F/FT/FK
Operating Ranges (Note)
Characteristics
Supply voltage
Input voltage
Output voltage
Operating temperature
Input rise and fall time
Symbol
V
CC
V
IN
V
OUT
T
opr
dt/dv
Rating
2.0 to 5.5
0 to 5.5
0 to V
CC
−40
to 85
0 to 100 (V
CC
= 3.3 ± 0.3 V)
0 to 20 (V
CC
= 5 ± 0.5 V)
Unit
V
V
V
°C
ns/V
Note:
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
Symbol
Test Condition
V
CC
(V)
High-level input
voltage
2.0
V
IH
―
3.0 to
5.5
2.0
V
IL
―
3.0 to
5.5
2.0
I
OH
=
−50 μA
High-level output
voltage
V
OH
V
IN
= V
IH
or V
IL
I
OH
=
−4
mA
I
OH
=
−8
mA
3.0
4.5
3.0
4.5
2.0
I
OL
= 50
μA
Low-level output
voltage
V
OL
V
IN
= V
IH
or V
IL
I
OL
= 4 mA
I
OL
= 8 mA
Input leakage
current
Quiescent supply
current
I
IN
I
CC
V
IN
= 5.5 or GND
V
IN
= V
CC
or GND
3.0
4.5
3.0
4.5
0 to 5.5
5.5
Min
1.50
V
CC
×
0.7
―
―
1.9
2.9
4.4
2.58
3.94
―
―
―
―
―
―
―
Ta = 25°C
Typ.
―
―
―
―
2.0
3.0
4.5
―
―
0.0
0.0
0.0
―
―
―
―
Max
―
―
0.50
V
CC
×
0.3
―
―
―
―
―
0.1
0.1
0.1
0.36
0.36
±0.1
4.0
Ta =
−40
to 85°C
Min
1.50
V
CC
×
0.7
―
―
1.9
2.9
4.4
2.48
3.80
―
―
―
―
―
―
―
Max
―
―
0.50
V
CC
×
0.3
―
―
―
―
―
0.1
0.1
0.1
0.44
0.44
±1.0
40.0
μA
μA
V
V
V
V
Unit
Low-level input
voltage
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2012-02-29
TC74VHC157F/FT/FK
AC Characteristics
(input: t
r
=
t
f
=
3 ns)
Characteristics
Symbol
Test Condition
V
CC
(V)
Propagation delay
time
(A, B-Y)
3.3 ± 0.3
―
5.0 ± 0.5
C
L
(pF)
15
50
15
50
15
50
15
50
15
50
15
50
Min
―
―
―
―
―
―
―
―
―
―
―
―
―
(Note)
―
Ta = 25°C
Typ.
6.2
8.7
4.1
5.6
8.4
10.9
5.3
6.8
8.7
11.2
5.6
7.1
4
20
Max
9.7
13.2
6.4
8.4
13.2
16.7
8.1
10.1
13.6
17.1
8.6
10.6
10
―
Ta =
−40
to 85°C
Min
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
―
―
Max
11.5
15.0
7.5
9.5
15.5
19.0
9.5
11.5
16.0
19.5
10.0
12.0
10
―
pF
pF
ns
ns
ns
Unit
t
pLH
t
pHL
Propagation delay
time
(SELECT-Y)
t
pLH
t
pHL
3.3 ± 0.3
―
5.0 ± 0.5
Propagation delay
time
(
ST
-Y)
Input capacitance
Power dissipation
capacitance
t
pLH
t
pHL
3.3 ± 0.3
―
5.0 ± 0.5
―
C
IN
C
PD
Note: C
PD
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:
I
CC (opr)
= C
PD
·V
CC
·f
IN
+ I
CC
/4 (per bit)
Noise Characteristics
(input: t
r
=
t
f
=
3 ns)
Characteristics
Quiet output maximum dynamic V
OL
Quiet output minimum dynamic V
OL
Minimum high level dynamic input
voltage
Maximum low level dynamic input
voltage
Symbol
V
OLP
V
OLV
V
IHD
V
ILD
C
L
= 50 pF
C
L
= 50 pF
C
L
= 50 pF
C
L
= 50 pF
Test Condition
V
CC
(V)
5.0
5.0
5.0
5.0
Ta = 25°C
Typ.
0.3
−0.3
―
―
Limit
0.8
−0.8
3.5
1.5
V
V
V
V
Unit
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2012-02-29
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