PERICOM PI3B3257AQ

PI3B3257A
3.3V, Quad 2:1 Mux/DeMux NanoSwitch™
Features
Description
• Near-Zero propagation delay
Pericom Semiconductor’s PI3B3257A is a 3.3 Volt, Quad 2:1
multiplexer/demultiplexer with three-state outputs that is pinout
and function compatible with the PI74FCT257T, 74F257, and
74ALS/AS/LS257. Inputs can be connected to outputs with low
On-Resistance (5Ω) with no additional ground bounce noise or
propagation delay.
• 5Ω switches connect inputs to outputs
•
Fast Switching Speed: 4.8ns max.
•
Ultra-Low Quiescent Power: 0.1µA typical
– Ideally suited for notebook applications
•
Pin compatible with 74 series 257 logic devices
• Packaging (Pb-free & Green avaliable):
– 16-pin 150 mil wide plastic QSOP (Q)
Pin Configuration
Block Diagram
IA0
IC1 ID0
IB1 IC0
IA1 IB0
ID1
SW
SW
SW
E
SW
SW
SW
S
SW
SW
S
1
16
VCC
IA0
2
15
E
IA1
3
14
ID0
YA
4
13
ID1
IB0
5
12
YD
IB1
6
11
IC0
YB
7
10
IC1
GND
8
9
YC
SW
YA
YB
YC
YD
I
Y
Pin Description
Pin Name
E
Truth Table(1)
E
S
YA
YB
YC
YD
Function
H
X
Hi-Z
Hi-Z
Hi-Z
Hi-Z
L
L
IA 0
IB0
IC0
ID 0
S=0
L
H
IA 1
IB1
IC1
ID 1
S=1
Disable
Note:
1. H = High Voltage Level
L = Low Voltage Level
1
Description
IA N -ID N
Data Inputs
S
Select Inputs
E
Enable
YA-YD
Data Outputs
GND
Ground
VCC
Power
NC
No Connect
PS8758A
02/24/05
PI3B3257A
3.3V, Quad 2:1 Mux/DeMux NanoSwitch™
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ..................................................................... –65°C to +150°C
Ambient Temperature with Power Applied .................................... –40°C to +85°C
Supply Voltage to Ground Potential.................................................–0.5V to +4.6V
DC Input Voltage .............................................................................–0.5V to +4.6V
DC Output Current........................................................................................ 120mA
Power Dissipation ............................................................................................ 0.5W
Note:
1. Stresses greater than those listed under MAXIMUM RATINGS may cause permanent damage to the device. This is a stress rating only and
functional operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not
implied. Exposure to absolute maximum rating conditions for extended periods may affect reliability.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Parameters
Test Conditions(1)
Description
Min.
Typ.(2)
Max. Units
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
–0.5
IIH
Input HIGH Current
VCC = Max., VIN = VCC
±1
IIL
Input LOW Current
VCC = Max., VIN = GND
±1
IOZH
High Impedance Output Current
0 ≤ In, Yn ≤ VCC
±1
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
RON
Switch
On-Resistance(3)
V
0.8
µA
–1.2
VCC = Min., VIN = 0.0V,
Ion = 48mA or 64mA
5
7
VCC = Min., VIN = 2.4V, ION = 15mA
8
17
Test Conditions
Typical
V
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters
Description
CIN
Input Capacitance
COFFYN
YN Capacitance, Switch OFF
COFFIN
IN Capacitance, Switch OFF
CON
IN/YN Capacitance, Switch ON
Units
2
VIN = 0V
7.5
pF
4.0
11
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 = 3.3V, TA = 25°C ambient and maximum loading.
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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PI3B3257A
3.3V, Quad 2:1 Mux/DeMux NanoSwitch™
Power Supply Characteristics
Parameters
Test Conditions(1)
Description
ICC
Quiescent Power Supply Current
VCC = Max.
VIN = GND or VCC
∆ICC
Supply Current per Input @ TTL
HIGH(3, 4)
VCC = Max.
VIN = 3.0
Min.
Typ.(2)
0.1
Max. Units
3.0
µA
750
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at VCC = 3.3V, +25°C ambient.
3. Per TTL driven input (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 Operating Range
Parameters
Description
tIY
Propagation Delay In to Yn(2,3)
tSY
Bus Select Time, Sn to Yn
tPZH
tPZL
Bus Enable Time, E to Yn
tPHZ
tPLZ
Bus Disable Time, E to Yn
Conditions(1)
Com.
Min.
Units
Max.
0.25
CL = 50pF
RL = 500Ω
1
4.5
1
4.5
1
4.8
ns
Notes:
1. See test circuit and waveforms.
2. This parameter is guaranteed but not tested on Propagation Delays.
3. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The
switch’s time constant alone is of the order of 0.25ns for 50pF load. Since this time constant is much smaller than the rise/fall times of typical
driving signals, it adds very little propagational delay to the system. Propagational delay of the bus switch when used in a system is determined
by the driving circuit on the driving side of the switch and its interaction with the load on the driven side.
Applications Information
Logic Inputs
The logic control inputs can be driven up to +3.6V regardless of the supply voltage. For example, given a + 3.3V supply, IN may be
driven low to 0V and high to 3.6V. Driving IN Rail-to-Rail® minimizes power consumption.
Power-Supply Sequencing and Hot-Plug Information
Proper power-supply sequencing is recommended for all CMOS devices. Always apply VCC and GND before applying signals to
input/output or control pins.
Rail-to-Rail is a registeredtrademark of Nippon Motorola, Ltd.
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PS8758A
02/24/05
PI3B3257A
3.3V, Quad 2:1 Mux/DeMux NanoSwitch™
Packaging Mechanical: 16-Pin QSOP (Q)
16
.008
0.20
MIN.
.150
.157
3.81
3.99
Guage Plane
.010
0.254
1
0˚-6˚
.016
.035
0.41
0.89
Detail A
.189
.197
4.80
5.00
.041
1.04
REF
.015 x 45° 0.38
.008
0.203 REF
.053 1.35
.069 1.75
Detail A
.008
.012
0.203
0.305
.007
.010
0.178
0.254
0.41 .016
1.27 .050
SEATING
PLANE
.025
BSC
0.635
.008
.013
0.20
0.33
.228
.244
5.79
6.19
.004 0.101
.010 0.254
X.XX DENOTES DIMENSIONS IN MILLIMETERS
X.XX
Ordering Information
Ordering Code
Packaging Code
Package Description
PI3B3257AQ
Q
16-pin 150-mil wide plastic QSOP
PI3B3257AQE
Q
Pb-Free & Green, 16-pin 150-mil wide plastic QSOP
Notes:
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation • 1-800-435-2336 • Fax (408) 435-1100 • www.pericom.com
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