PI3B3244
3.3V, Hot Insertion,
TM
8-Bit, 2-Port NanoSwitch
Features Description
Near-Zero propagation delay Pericom Semiconductors PI3B series of logic circuits are pro-
duced using the Companys advanced sub-micron CMOS tech-
5-ohm switches connect inputs to outputs
nology, achieving industry leading performance.
Fast Switching Speed: 4.5ns (max.)
e Th PI3B3244 features a set of 3.3V 8-bit bus switches, which is
Ultra-Low Quiescent Power (0.2A Typical)
pinout and function compatible with the P74FCT244T, 74F244,
Ideally suited for notebook applications
and 74ALS/AS/LS2448-bit drivers. Two enable signals (BEn) turn
Packaging (Pb-free & Green):
the switches on similar to the enable signals of the 244. e Th bus
switch create no additional propagation delay or ground bounce
20-pin 173-mil wide plastic TSSOP (L)
noise.
Block Diagram Pin Configuration
BE 1 20 Vcc
BE1 1
1A0 2 19 BE2
1B0
1A0 SW
2B3 3 18 1B0
1A1 4 17 2A3
2B2 5 16 1B1
1B1
1A1
SW
1A2 6 15 2A2
7 14
2B1 1B2
1A2 1B0
8 13
SW 1A3 2A1
9 12
2B0 1B3
SW
10 11
GND 2A0
1A3 1B1
SW
A
B
Pin Description
BE2
Pin Name Description
2A0
2B0
SW
BE
BEn Bus Enable Input (Active LOW)
A0-7 Bus A
2B1
2A1
SW
B0-7 Bus B
2A2 2B2
GND Ground
SW
Power
V
CC
2B3
2A3
SW
(1)
Truth Table
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
All trademarks are property of their respective owners. www.pericom.com PS8149H 09/27/10
11-0003 1PI3B3244
TM
3.3V, Hot Insertion, 8-Bit, 2-Port NanoSwitch
Absolute Maximum Ratings
Parameter Min. Max. Units
o
Storage Temperature -65 150 C
o
Ambient Temperature with Power Applied -40 85 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, T = 40C to +85C, V = 3.3V 10%)
A CC
(1) (2)
Parameters Description Test Conditions Min Typ Max Units
V Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V
IH
V Input LOW Voltage Guaranteed Logic LOW Level -0.5 0.8 V
IL
I Input HIGH Current V = Max., V = V 1 A
IH CC IN CC
I Input LOW Current V = Max., V = GND 1 A
IL CC IN
I High Impedance Output Current 0 I , Y V 1 A
OZH N N CC
Clamp Diode Voltage -1.2 V
V V = Min., I = 18 mA
IK CC IN
V = Min., V = 0.0V, I = 48mA
CC IN ON
5 8
(3)
or 64mA
R Switch On Resistance
ON
V = Min, V = 2.4V, I = 15mA 10 17
CC IN ON
Capacitance (T = 25C, f = 1 MHz)
A
(1)
Parameters Description Test Conditions Typ Units
C Input Capacitance V = 0V 3.0 pF
IN IN
C A/B Capacitance, Switch Off V = 0V 8.0 pF
OFF IN
C A/B Capacitance, Switch On V = 0V 16.0 pF
ON IN
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V = 3.3V, T = 25C ambient and maximum loading.
CC A
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.
All trademarks are property of their respective owners. www.pericom.com PS8149H 09/27/10
11-0003 2