Datasheet

PI3B3251
3.3V, 8:1 Mux/DeMux NanoSwitch™
Features
Description
• Near-Zero propagation delay
• 5Ω switches connect inputs to outputs
• Ultra Low Quiescent Power (0.1μA typical)
– Ideally suited for notebook applications
• Pin compatible with 74 series 251 logic devices
• Packaging (Pb-free & Green available):
– 16-pin 150-mil wide plastic QSOP (Q)
– 16-pin 173-mil wide plastic TSSOP (L)
Pericom Semiconductor’s PI3B3251 is a 3.3V Dual 8:1 Multiplexer/
Demultiplexer with three-state outputs that is pinout compatible
with the PI74FCT251T, 74F251, and 74ALS/AS/LS 251. Inputs
can be connected to outputs with low On-Resistance (5Ω) with no
additional ground bounce noise or propagation delay.
Block Diagram
Pin Configuration
I1
I0
I2
I3
I4
I5
I6
I7
I3
1
16
VCC
I2
2
15
I4
I1
3
14
I5
I0
4
13
I6
Y
5
12
I7
NC
6
11
S0
E
7
10
S1
GND
8
9
S2
SW
E
SW
SW
SW
S0
SW
S1
SW
I
SW
Y
S2
SW
SW
E
Y
Truth Table(1)
E
Pin Description
Select
Y
Function
Pin Name
Description
I0–7
Data Inputs
Disable
S0–2
Select Inputs
I0
S2-0 = 0
E
Enable
H
I1
S2-0 = 1
Y
Data Outputs
H
L
I2
S2-0 = 2
GND
Ground
L
H
H
I3
S2-0 = 3
VCC
Power
L
H
L
L
I4
S2-0 = 4
NC
No Connect
L
H
L
H
I5
S2-0 = 5
L
H
H
L
I6
S2-0 = 6
L
H
H
H
I7
S2-0 = 7
S2
S1
S0
H
X
X
X
Hi-Z
L
L
L
L
L
L
L
L
L
L
Note:
1. H = High Voltage Level, L = Low Voltage Level
09-0037
1
PS8150G
03/02/09
PI3B3251
3.3V, 8:1 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:
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.
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
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, Y ≤ VCC
±1
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
Switch On-Resistance(3)
RON
0.8
–1.2
VCC = Min., VIN = 0.0V,
ION = 48mA or 64mA
5
8
VCC = Min., VIN = 2.4V,
ION = 15mA
10
17
Units
V
μA
V
Ω
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.
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1)
CIN
Description
Input Capacitance
CI(OFF)
I0 - I7 Capacitance, Switch Off
CY(OFF)
Y Capacitance, Switch Off
CI(ON)
Test Conditions
Typ.
Units
3.0
VIN = 0V
I0 - I7 Capacitance, Switch On
8.0
pF
64.0
72.0
Note:
1. This parameter is determined by device characterization but is not production tested.
09-0037
2
PS8150G
03/02/09
PI3B3251
3.3V, 8:1 Mux/DeMux NanoSwitch™
Power Supply Characteristics
Test Conditions(1)
Parameters
Description
ICC
Quiescent Power Supply Current
VCC = Max.
VIN = GND or VCC
Supply Current per Input
@ TTL HIGH
VCC = Max.
VIN = 3.0V(3)
ΔICC
Min.
Typ.(2)
Max.
0.1
3
750
Units
μA
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 input only); I and Y pins do not contribute to ICC.
Switching Characteristics over Operating Range
Parameters
Description
tPD
Propagation Delay(1,2), In to Y
tSY
Bus Enable Time, Sn to Y
tPZH
tPZL
Bus Enable Time, E to Y
tPHZ
tPLZ
Bus Disable Time, E to Y
Conditions
Com.
Min.
Max.
Units
0.25
CL = 50pF
RL = 500Ω
1
4.5
1
3.5
1
5.5
ns
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. The bus switch contributes no propagational delay other than the RC delay of the On-Resistance of the switch and the load capacitance. The time
constant for the switch 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 registered trademark of Nippon Motorola, Ltd.
09-0037
3
PS8150G
03/02/09
PI3B3251
3.3V, 8:1 Mux/DeMux NanoSwitch™
Packaging Mechanical: 16-pin QSOP (Q)
DOCUMENT CONTROL NO.
PD - 1201
REVISION: G
16
.008
0.20
MIN.
.150
.157
3.81
3.99
Guage Plane
.010
0.254
1
DATE: 11/07/07
.008
.013
0.20
0.33
Detail A
.189
.197
4.80
5.00
0˚-6˚
.016
.035
0.41
0.89
.041
1.04
REF
.015 x 45° 0.38
1
.008
0.203 REF
.053 1.35
.069 1.75
Detail A
.007 0.178
.010 0.254
SEATING
PLANE
.025
BSC
0.635
.008
.012
0.203
0.305
.004 0.101
.010 0.254
.228
.244
5.79
6.19
X.XX DENOTES DIMENSIONS IN MILLIMETERS
X.XX
Note:
1) Controlling dimensions in inches.
2) Ref: JEDEC MO-137B/AB.
3) Dimensions do not include mold flash, protrusions or gate burrs
09-0037
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2335 • www.pericom.com
DESCRIPTION: 16-Pin 150-Mil Wide QSOP
PACKAGE CODE: Q
4
PS8150G
03/02/09
PI3B3251
3.3V, 8:1 Mux/DeMux NanoSwitch™
Packaging Mechanical: 16-pin TSSOP (L)
DOCUMENT CONTROL NO.
PD - 1310
REVISION: E
16
DATE: 03/09/05
.169
.177
4.3
4.5
1
.193
.201
4.9
5.1
.004
.008
1
.047
max.
1.20
0.45 .018
0.75 .030
SEATING
PLANE
.0256
BSC
0.65
.007
.012
.002
.006
0.09
0.20
.252
BSC
6.4
0.05
0.15
0.19
0.30
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2335 • www.pericom.com
Note:
1. Package Outline Exclusive of Mold Flash and Metal Burr
2. Controlling dimentions in millimeters
3. Ref: JEDEC MO-153F/AB
DESCRIPTION: 16-Pin, 173-Mil Wide, TSSOP
PACKAGE CODE: L
Ordering Information
Ordering Code
Package Code
Package Description
PI3B3251QE
Q
Pb-free & Green, 16-pin QSOP
PI3B3251LE
L
Pb-free & Green, 16-Pin TSSOP
Notes:
• Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
• "E" denotes Pb-free and Green
• Adding an "X" at the end of the ordering code denotes tape and reel packaging
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
09-0037
5
PS8150G
03/02/09