Document
UNISONIC TECHNOLOGIES CO., LTD
US5C3257
Preliminary
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
CMOS IC
Packing Tape Reel
Tube
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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 VCC
Select Inputs
Data Inputs
Data Outputs Ground Enable Power
DESCRIPTION
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US5C3257
BLOCK DIAGRAM
Preliminary
CMOS IC
IA0 IA1 IB0 IB1 IC0 IC1 ID0 ID1
E S
YA YB
TRUTH TABLE
E S YA H X Hi-Z L L IA0 L H IA1 Note: H=High Voltage Level, L=Low Voltage Level
YB Hi-Z IB0 IB1
YC YD
YC YD Function Hi-Z Hi-Z Disable IC0 ID0 S=0 IC1 ID1 S=1
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US5C3257
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage to Ground Potential (Inputs & VCC Only) Supply Voltage to Ground Potential (Outputs & D/O Only)
-0.5~+7.0 -0.5~+7.0
V V
DC Input Voltage
-0.5~+7.0
V
DC Output Current
120 mA
Power Dissipation
PD 0.5 W
Storage Temperature
TSTG
-55~+150
°C
Ambient Temperature with Power Applied
TOPR
-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 VCC=5 V, TA=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 TEST CONDITIONS (Note 1)
VIH Guaranteed Logic HIGH Level
VIL Guaranteed Logic LOW Level
IIH VCC=Max., VIN=VCC
IIL VCC=Max., VIN=GND
IOZH 0≤I, Y≤VCC
VIK VCC=Min., IIN=-18mA
IOS I(Y)=0V, Y(I)=VCC
VH
RON
VCC=Min., VIN=0.0V, ION=48mA VCC=Min., VIN=2.4V, ION=15mA
MIN
TYP (Note 1)
MAX
2.0
-0.5 0.8
±1
±1
±1
-0.7 -1.2
100
150
57
10 15
UNIT
V V µA µA µA V mA mV Ω Ω
CAPACITANCE (TA=25°C, f=1MHz)
PARAMETER (Note 4)
SYMBOL
TEST CONDITIONS
MIN TYP MAX UNIT
Input Capacitance
CIN VIN=0V
6 pF
In/Yn Capacitance, Switch Off
COFF
VIN=0V
6 pF
In/Yn Capacitance, Switch On
CON
VIN=0V
14 pF
Notes:1. Typical values are at VCC=5.0V, TA=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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Preliminary
CMOS IC
POWER SUPPLY CHARACTERISTICS
PARAMETER
SYMBOL
TEST CONDITIONS (Note 1)
MIN
TYP (Note 2)
MAX
UNIT
Quiescent Power Supply Current Supply Current per Input @ TTL HIGH
ICC ∆ICC
VCC=Max., VIN=GND or VCC VCC=Max., VIN=3.4V (Note 3)
0.1 3.0 µA 2.5 mA
Supply Current per Input per MHz (Note 4)
VCC=Max., I and Y Pins Open ICCD BE =GND, Control Input Toggling
50% Duty Cycle
0.25
mA/ MHz
Notes:1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the
applicable device type.
2. Typical values are at VCC=5.0V, TA=25°C ambient and maximum loading. 3. Per TTL driven input (VIN=3.4V, control inputs only); I and Y pins do not contribute to ICC. 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 TEST CONDITIONS (Note 1) MIN TYP MAX UNIT
tIY 0.25.