UNISONIC TECHNOLOGIES CO., LTD
US5C3257
Preliminary
CMOS IC
QUAD 2:1 MUX/DEMUX BUS
SWITCH
DESCRIPTION
The UTC
US5C3257
is a QUAD 2:1 multiplexer/demultiplexer
with low on-resistance and is pinout and function compatible with
the TTL device. Inputs can be connected to outputs with low on
resistance (5Ω) with no additional ground bounce noise or
propagation delay.
FEATURES
* 5Ω switches connect inputs to outputs
* ESD protection on pin
* Near zero propagation delay
* Ultra Low Quiescent Power (0.2µA Typical)
–Ideally suited for notebook applications
* Direct bus connection when switches are ON
* Pin compatible with U74 series logic devices
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
US5C3257L-S16-R
US5C3257G-S16-R
US5C3257L-S16-T
US5C3257G-S16-T
Note: xx: Output Voltage, refer to Marking Information.
Package
SOP-16
SOP-16
Packing
Tape Reel
Tube
www.unisonic.com.tw
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PIN CONFIGURATION
Preliminary
CMOS IC
PIN DESCRIPTION
PIN NO.
1
2, 3, 5, 6, 10,
11,13,14,
4, 7, 9, 12
8
15
16
PIN NAME
S
IAn-IDn
YA-YD
GND
E
V
CC
DESCRIPTION
Select Inputs
Data Inputs
Data Outputs
Ground
Enable
Power
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BLOCK DIAGRAM
IA0
IA1
Preliminary
CMOS IC
IB0
IB1
IC0
IC1
ID0
ID1
E
S
YA
YB
YC
YD
TRUTH TABLE
E
S
X
L
H
YA
Hi-Z
IA0
IA1
YB
Hi-Z
IB0
IB1
YC
Hi-Z
IC0
IC1
YD
Hi-Z
ID0
ID1
Function
Disable
S=0
S=1
H
L
L
Note: H=High Voltage Level, L=Low Voltage Level
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ABSOLUTE MAXIMUM RATING
Preliminary
CMOS IC
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage to Ground Potential (Inputs & V
CC
Only)
-0.5~+7.0
V
Supply Voltage to Ground Potential (Outputs & D/O Only)
-0.5~+7.0
V
DC Input Voltage
-0.5~+7.0
V
DC Output Current
120
mA
Power Dissipation
P
D
0.5
W
Storage Temperature
T
STG
-55~+150
°C
Ambient Temperature with Power Applied
T
OPR
-40~+85
°C
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
DC ELECTRICAL CHARACTERISTICS
(Typical application at V
CC
=5 V, T
A
=25°C, unless otherwise noted)
PARAMETER
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Short Circuit Current (Note 2)
Input Hysteresis at Control Pins
Switch On Resistance (Note 3)
SYMBOL
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
I
OS
V
H
R
ON
TEST CONDITIONS (Note 1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
=Max., V
IN
=V
CC
V
CC
=Max., V
IN
=GND
0≤I, Y≤V
CC
V
CC
=Min., I
IN
=-18mA
I(Y)=0V, Y(I)=V
CC
V
CC
=Min., V
IN
=0.0V, I
ON
=48mA
V
CC
=Min., V
IN
=2.4V, I
ON
=15mA
MIN
2.0
-0.5
TYP
MAX
(Note 1)
0.8
±1
±1
±1
-1.2
UNIT
V
V
µA
µA
µA
V
mA
mV
Ω
Ω
-0.7
100
150
5
10
7
15
CAPACITANCE
(T
A
=25°C, f=1MHz)
PARAMETER (Note 4)
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Input Capacitance
C
IN
V
IN
=0V
6
pF
In/Yn Capacitance, Switch Off
C
OFF
V
IN
=0V
6
pF
In/Yn Capacitance, Switch On
C
ON
V
IN
=0V
14
pF
Notes: 1. Typical values are at V
CC
=5.0V, T
A
=25°C ambient and maximum loading.
2. Not more than one output should be shorted at one time. Duration of the test should not exceed one
second.
3. Measured by the voltage drop between I and Y pin at indicated current through the switch. ON resistance is
determined by the lower of the voltages on the two (I, Y) pins.
4. This parameter is determined by device characterization but is not production tested.
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PARAMETER
Quiescent Power Supply Current
Supply Current per Input @ TTL
HIGH
Supply Current per Input per MHz
(Note 4)
SYMBOL
I
CC
∆I
CC
I
CCD
Preliminary
CMOS IC
POWER SUPPLY CHARACTERISTICS
TEST CONDITIONS (Note 1)
V
CC
=Max., V
IN
=GND or V
CC
V
CC
=Max., V
IN
=3.4V (Note 3)
V
CC
=Max., I and Y Pins Open
MIN
TYP
MAX
(Note 2)
0.1
3.0
2.5
UNIT
µA
mA
mA/
0.25
BE
=GND, Control Input Toggling
MHz
50% Duty Cycle
Notes: 1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the
applicable device type.
2. Typical values are at V
CC
=5.0V, T
A
=25°C ambient and maximum loading.
3. Per TTL driven input (V
IN
=3.4V, control inputs only); I and Y pins do not contribute to I
CC
.
4. This current applies to the control inputs only and represent the current required to switch internal
capacitance at the specified frequency. The I and Y inputs generate no significant AC or DC currents as
they transition. This parameter is not tested, but is guaranteed by design.
SWITCHING CHARACTERISTICS OVER OPERATIONG RANGE
PARAMETER
Propagation Delay In to Yn
(Note 2, 3)
Bus Select Time Sn to Yn
Bus Disable Time
E
to Yn
Bus Disable Time
E
to Yn
SYMBOL
t
IY
t
SY
t
PZH
/ t
PZL
t
PHZ
/ t
PLZ
C
L
=50pF, R
L
=500Ω
0.5
0.5
0.5
TEST CONDITIONS (Note 1)
MIN
TYP
MAX
0.25
5.2
4.8
5.0
UNIT
ns
ns
ns
ns
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