A product Line of
Diodes Incorporated
PI3B3257
3.3V, Quad 2:1 Mux/DeMux NanoSwitch™
Features
Description
¼¼Near-Zero propagation delay
The PI3B3257 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.
¼¼5Ω switches connect inputs to outputs
¼¼Fast Switching Speed: 4.8ns max.
¼¼Ultra-Low Quiescent Power: 0.1µA typical
– Ideally suited for notebook applications
IA1 IB0
IB1 IC0
IC1 ID0
ID1
E
ID0
ID1
14
13
S
1
12
YD
IA0
2
11
IC0
I A1
3
10
IC1
YA
4
9
YC
5
IB0
SW
SW
SW
SW
SW
SW
SW
YA
YB
8
Truth Table(1)
SW
S
7
Transparent top view
SW
E
6
GND
IA0
15
YB
Block Diagram
16
I B1
¼¼Packaging (Pb-free & Green avaliable):
– 16-pin, QSOP (Q)
– 16-pin, SOIC (W)
– 16-pin, TSSOP (L)
– 16-pin, UQFN (ZHD)
VCC
Pin Configuration (UQFN)
¼¼Pin compatible with 74 series 257 logic devices
YC
S
YA
YB
YC
YD
Function
H
X
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Disable
L
L
IA 0
IB0
IC0
I D0
S=0
L
H
IA 1
IB1
IC1
I D1
S=1
Note:
1. H = High Voltage Level
L = Low Voltage Level
YD
I
E
Y
Pin Description
E
Pin Configuration (QSOP, SOIC, TSSOP)
PI3B3257
Pin Name
Description
I A N - ID N
Data Inputs
S
Select Inputs
E
Enable
S
1
16
VCC
IA0
2
15
E
IA1
3
14
ID0
GND
Ground (1)
YA
4
13
ID1
VCC
Power
IB0
5
12
YD
NC
No Connect
IB1
6
11
IC0
YB
7
10
IC1
GND
8
9
YC
Document Number DS40430 Rev 2-2
YA-YD
Data Outputs
Note 1: UQFN16 package die supply ground is connected to both GND pin and
exposed center pad. GND pin must be connected to supply ground for proper device operation. For enhanced thermal, electrical, and board level performance, the
exposed pad needs to be soldered to the board using a corresponding thermal pad
on the board and for proper heat conduction through the board, thermal vias need
to be incorporated in the PCB in the thermal pad region.
1
www.diodes.com
April 2018
Diodes Incorporated
A product Line of
Diodes Incorporated
PI3B3257
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
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 mplied. Exposure to absolute maximum rating
conditions for extended periods may affect reliability.
Power Dissipation............................................................................................. 0.5W
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Test Conditions(1)
Parameters
Description
Min.
Typ.(2)
Max.
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)
VCC = Min., VIN = 0.0V,
Ion = 48mA or 64mA
5
8
VCC = Min., VIN = 2.4V, ION = 15mA
8
17
Units
V
0.8
µA
–1.2
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) Description
CIN
Input Capacitance
COFFYN
COFFIN
CON
YN Capacitance, Switch OFF
IN Capacitance, Switch OFF
IN/YN Capacitance, Switch ON
Test Conditions
Typ.
3.0
17.0
8.5
25
VIN = 0V
Units
pF
Notes:
1. This parameter is determined by device characterization but is not production tested.
Power Supply Characteristics
Test Conditions(1)
Parameters
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)
Max.
0.1
3.0
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 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.
PI3B3257
Document Number DS40430 Rev 2-2
2
www.diodes.com
April 2018
Diodes Incorporated
A product Line of
Diodes Incorporated
PI3B3257
Switching Characteristics Over Operating Range
PI3B3257
Parameters
Description
Conditions
Com.
Min.
to Yn(1,2)
tIY
Propagation Delay In
tSY
Bus Select Time, Sn to Yn
tPZH
tPZL
Bus Enable Time, E to Yn
tPHZ
tPLZ
Bus Disable Time, E to Yn
Units
Max.
0.25
CL = 50pF
RL = 500Ω
1
4.5
1
4.5
1
4.8
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 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.
Part Marking
Q Package W Package L Package
PI3B
3257QE
YWXX
Y: Year
W: Workweek
1st X: Assembly Site Code
2nd X: Fab Site Code
PI3B
3257WE
YYWWXX
YY: Date Code (Year)
WW: Date Code (Workweek)
1st X: Assembly Site Code
2nd X: Fab Site Code
PI3B
3257LE
YYWWXX
YY: Year
WW: Workweek
1st X: Assembly Site Code
2nd X: Fab Site Code
ZHD Package
wDZHDE
YWXX
Y: Year
W: Workweek
1st X: Assembly Site Code
2nd X: Fab Site Code
PI3B3257
Document Number DS40430 Rev 2-2
3
www.diodes.com
April 2018
Diodes Incorporated
A product Line of
Diodes Incorporated
PI3B3257
Packaging Mechanical: 16-QSOP (Q)
16-0056
PI3B3257
Document Number DS40430 Rev 2-2
4
www.diodes.com
April 2018
Diodes Incorporated
A product Line of
Diodes Incorporated
PI3B3257
Packaging Mechanical: 16-SOIC (W)
16-0145
PI3B3257
Document Number DS40430 Rev 2-2
5
www.diodes.com
April 2018
Diodes Incorporated
A product Line of
Diodes Incorporated
PI3B3257
Packaging Mechanical: 16-TSSOP (L)
16-0061
PI3B3257
Document Number DS40430 Rev 2-2
6
www.diodes.com
April 2018
Diodes Incorporated
A product Line of
Diodes Incorporated
PI3B3257
Packaging Mechanical: 16-UQFN (ZHD)
D
e
N16
0.70x16
L
N13
N1
1.60
1.60
E1
E
b
D1
N9
0.50BSC
N4
N8
Top View
2.90
N12
16X0.27
PIN1
Index Area
N5
2.90
Bottom View
RECOMMENDED LAND PATTERN(unit:mm)
PKG. DIMENSIONS(MM)
SYMBOL
A3
A1
A
Max
0.50
0.65
A1
0.00
0.05
A3
Side View
Min
A
0.15 REF
D
2.90
3.10
E
2.90
3.10
D1
1.60
1.90
E1
1.60
1.90
b
0.18
0.30
e
L
0.50 BSC
0.25
0.55
Note:
1. Comply with MO-248E ,except 'L' MIN and 'L' 'D1' 'E1' MAX
DATE: 07/27/16
DESCRIPTION: 16-Pin, UQFN, 3X3
PACKAGE CODE: ZHD(ZHD16)
DOCUMENT CONTROL#: PD-2209
REVISION: --
16-0092
For latest package info.
please check: http://www.diodes.com/design/support/packaging/pericom-packaging/packaging-mechanicals-and-thermal-characteristics/
Ordering Information
Ordering Code
Packaging Code
Package Description
PI3B3257QEX
Q
16-pin, 150 mil wide (QSOP)
PI3B3257WEX
W
16-pin, 150-mil wide (SOIC)
PI3B3257LEX
L
16-pin, 173 mil wide (TSSOP)
PI3B3257ZHDEX
ZHD
16-pin, 3x3 (UQFN)
Notes:
1. EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. All applicable RoHS exemptions applied.
2. See http://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, “Green” and Lead-free.
Thermal characteristics can be found on the company web site at www.diodes.com/design/support/packaging/
3. E = Pb-free and Green
4. X suffix = Tape/Reel
PI3B3257
Document Number DS40430 Rev 2-2
7
www.diodes.com
April 2018
Diodes Incorporated
A product Line of
Diodes Incorporated
PI3B3257
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE (AND THEIR EQUIVALENTS UNDER THE
LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes without further notice
to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the application or use of this document or any
product described herein; neither does Diodes Incorporated convey any license under its patent or trademark rights, nor the rights of others. Any Customer or user of
this document or products described herein in such applications shall assume all risks of such use and will agree to hold Diodes Incorporated and all the companies
whose products are represented on Diodes Incorporated website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or indirectly, any claim of personal injury or
death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings noted herein may
also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express written approval of
the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the labeling can be reasonably expected
to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and acknowledge and
agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any use of Diodes Incorporated products
in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its representatives against any damages arising out of the use of Diodes Incorporated
products in such safety-critical, life support devices or systems.
Copyright © 2016, Diodes Incorporated
www.diodes.com
PI3B3257
Document Number DS40430 Rev 2-2
8
www.diodes.com
April 2018
Diodes Incorporated