Datasheet

PI3B3244
3.3V, Hot Insertion,
8-Bit, 2-Port NanoSwitchTM
Features
Description
ÎÎNear-Zero propagation delay
Pericom Semiconductor’s PI3B series of logic circuits are produced using the Company’s advanced sub-micron CMOS technology, achieving industry leading performance.
ÎÎ5-ohm switches connect inputs to outputs
ÎÎFast Switching Speed: 4.5ns (max.)
The PI3B3244 features a set of 3.3V 8-bit bus switches, which is
pinout and function compatible with the P74FCT244T, 74F244,
and 74ALS/AS/LS2448-bit drivers. Two enable signals (BEn) turn
the switches on similar to the enable signals of the 244. The bus
switch create no additional propagation delay or ground bounce
noise.
ÎÎUltra-Low Quiescent Power (0.2μA Typical)
àà Ideally suited for notebook applications
ÎÎPackaging (Pb-free & Green):
àà 20-pin 173-mil wide plastic TSSOP (L)
Block Diagram
Pin Configuration
BE1
1A0
SW
1B0
1A1
SW
1B1
1A2
SW
1B0
1A3
SW
1B1
2A0
SW
2B0
2A1
SW
2B1
2A2
SW
2B2
SW
2B3
2A3
SW
A
BE2
BE1
1A0
2B3
1A1
2B2
1A2
2B1
1A3
2B0
GND
B
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
Vcc
BE2
1B0
2A3
1B1
2A2
1B2
2A1
1B3
2A0
Pin Description
Pin Name
BE
Description
BEn
Bus Enable Input (Active LOW)
A0-7
Bus A
B0-7
Bus B
GND
Ground
VCC
Power
Truth Table(1)
BE1
BE2
1A, 1B
2A, 2B
H
H
Disconnect
Disconnect
L
H
1A = 1B
Disconnect
H
L
Disconnect
2A = 2B
L
L
1A = 1B
2A = 2B
Note:
1. H = High Voltage Level, L = Low Voltage Level
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PS8149H
09/27/10
PI3B3244
3.3V, Hot Insertion, 8-Bit, 2-Port NanoSwitchTM
Absolute Maximum Ratings
Parameter
Min.
Max.
Units
Storage Temperature
-65
150
o
C
Ambient Temperature with Power Applied
-40
85
o
C
Supply Voltage to Ground Potential
-0.5
4.6
V
DC Input Voltage
-0.5
4.6
V
DC Output Current
-
120
mA
Power Dissipation
-
0.5
W
Stress beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Parameters
Description
Test Conditions(1)
Min
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
-0.5
IIH
Input HIGH Current
IIL
Input LOW Current
IOZH
Typ (2)
Max
Units
V
0.8
V
VCC = Max., VIN = VCC
±1
μA
VCC = Max., VIN = GND
±1
μA
High Impedance Output Current 0 ≤ IN, YN ≤ VCC
±1
μA
VIK
Clamp Diode Voltage
-1.2
V
RON
Switch On Resistance
VCC = Min., IIN = –18 mA
(3)
VCC = Min., VIN = 0.0V, ION = 48mA
or 64mA
5
8
VCC = Min, VIN = 2.4V, ION = 15mA
10
17
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(1)
Description
Test Conditions
Typ
Units
CIN
Input Capacitance
VIN = 0V
3.0
pF
COFF
A/B Capacitance, Switch Off
VIN = 0V
8.0
pF
CON
A/B Capacitance, Switch On
VIN = 0V
16.0
pF
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 A and B pin at indicated current through the switch. ON resistance is determined by the lower of the voltages on the two
(A,B) pins.
4. This parameter is determined by device characterization but is not production tested.
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PS8149H
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PI3B3244
3.3V, Hot Insertion, 8-Bit, 2-Port NanoSwitchTM
Power Supply Characteristics
Parameters
Description
Test Conditions(1)
Min
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
ΔICC
Supply Current
per Input @ TTL
HIGH
VCC = Max.
VIN = 3.0V(3)
Typ (2)
Max
Units
0.1
3.0
μA
750
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); A and B pins do not contribute to ICC .
Switching Characteristics over Operating Range
Com.
Parameters
Description
tPLH
tPHL
Propagation Delay(2,3)
Ax to Bx
tPZH
tPZL
Bus Enable Time
BE to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BE to Ax or Bx
Min
Test Conditions(1)
Max
Units
0.25
CL = 50 pF
RL = 500Ω
1.0
4.0
1.0
4.5
ns
Notes:
1. See test circuit and wave forms.
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 time constant for the switch alone is of the order of 0.25 ns for 50 pF 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.
All trademarks are property of their respective owners.
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PS8149H
09/27/10
PI3B3244
3.3V, Hot Insertion, 8-Bit, 2-Port NanoSwitchTM
Packaging Mechanical: 20-Pin TSSOP (L)
DOCUMENT CONTROL NO.
PD - 1311
20
REVISION: E
DATE: 03/09/05
.169
.177
1
.252
.260
6.4
6.6
.004 0.09
.008 0.20
.047
1.20
Max
1
.0256
BSC
0.65
4.3
4.5
.007
.012
0.19
0.30
.002
.006
0.45
0.75
SEATING
PLANE
.018
.030
.238
.269
6.1
6.7
0.05
0.15
Pericom Semiconductor Corporation
3545 N. 1st Street, San Jose, CA 95134
1-800-435-2336 • www.pericom.com
Note:
1. Package Outline Exclusive of Mold Flash and Metal Burr
2. Controlling dimentions in millimeters
3. Ref: JEDEC MO-153F/AC
DESCRIPTION: 20-Pin, 173-Mil Wide, TSSOP
PACKAGE CODE: L
Ordering Information
Ordering Code
Package Code
Package Type
PI3B3244LE
L
Pb-free & Green, 20-pin TSSOP
1. Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
Pericom Semiconductor Corporation • 1-800-435-2336
All trademarks are property of their respective owners.
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PS8149H
09/27/10