PERICOM PI33X257B

PI3B33X257
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3.3V, 24:12 Mux/Demux BusSwitch
Product Features
Product Description
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Pericom Semiconductor’s PI3B series of logic circuits are produced
using the Company’s advanced sub micron CMOS technology,
achieving industry leading performance.
The PI3B33X257 is a 3.3V, 24:12 multiplexer/demultiplexer with
three-state outputs. Inputs can be connected to outputs with low
on resistance (5 Ohm) with no additional ground bounce noise or
propagation delay.
Permits Hot Insertion
Near zero propagation delay
5 Ohm switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra Low Quiescent Power (0.2µA Typical)
– Ideally suited for notebook applications
• TTL - compatible control of input levels
• Fast switching speed - 4.5ns max.
• Packages available:
–48-pin 150 mil wide plastic BQSOP (B)
Logic Block Diagram
Truth Table(1)
En
H
L
L
Notes:
Sn
X
L
H
IA1
IA0
YA(2)
Hi-Z
IA0
IA1
YB(2)
Hi-Z
IB0
IB1
YC(2)
Hi-Z
IC0
IC1
YD(2)
Hi-Z
ID0
ID1
Function
Disable
S=0
S=1
IB1
IC0
IC1
ID0
ID1
E0
1. H = High Voltage Level
L = Low Voltage Level
2. n = 0 YA, YB, YC, YD
n = 1 YE, YF, YG, YH
n = 2 YI, YJ, YK, YL
S0
48-Pin Product Configuration
S0
1
48
YA
IA0
2
47
E0
3
46
ID0
YA
4
45
ID1
IB0
5
44
YD
IB1
6
43
IC0
YB
7
42
IC1
GND
8
41
YC
VCC
S1
9
40
IE0
10
39
E1
IE1
11
38
IH0
YE
12
37
IH1
IF0
13
36
YH
IF1
14
35
IG0
YF
15
34
IG1
GND
16
33
YG
S2
17
32
VCC
II0
18
31
E2
II1
19
30
IL0
YI
20
29
IL1
IJ0
21
28
YL
IJ1
22
27
IK0
YJ
23
26
IK1
GND
24
25
YK
YB
IE1
IE0
VCC
IA1
48-Pin
B
IB0
IF0
YC
IF1
IG0
YD
IG1
IH0
IH1
E1
S1
YE
YF
II1
II0
IJ0
YG
IJ1
IK0
YH
IK1
IL0
IL1
E2
S2
YI
1
YJ
YK
YL
PS8334A
09/28/99
PI3B33X257
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3.3V, 24:12 Mux/Demux BusSwitch
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Product Pin Description
Pin Name
IAn-ILn
S
En
YA-YL
GND
VCC
NC
Description
Data Inputs
Select Inputs
Enable
Data Outputs
Ground
Power
No Connect
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 (Inputs & VCC Only) ...... –0.5V to +7.0V
Supply Voltage to Ground Potential (Outputs & D/O Only) .... –0.5V to +7.0V
DC Input Voltage ..................................................................... –0.5V to +7.0V
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 ±5%)
Test Conditions(1)
Parameters Description
Min. Typ.(2)
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
Max.
Units
V
0.8
V
VCC = Max., VIN = VCC
±50
µA
VCC = Max., VIN = GND
±1
µA
High Impedance Output Current 0 ≤ I, Y ≤ VCC
±50
µA
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
–1.2
V
RON
Switch On Resistance(3)
VCC = Min., VIN = 0.0V, ION = 48mA or 64mA
VCC = Min., VIN = 2.4V, ION = 15mA
7
15
Ω
5
10
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(4)
Description
Test Conditions
Typ.
Max.
Units
CIN
COFF
Input Capacitance
In/Yn Capacitance, Switch Off
VIN = 0V
VIN = 0V
3.0
17.0
pF
pF
CON
In/Yn Capacitance, Switch On
VIN = 0V
25.0
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 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.
2
PS8334A
09/28/99
PI3B33X257
3.3V, 24:12 Mux/Demux BusSwitch
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Power Supply Characteristics
Test Conditions(1)
Parameters Description
Min.
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
∆ICC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.0V(3)
Typ.(2) Max.
0.1
Units
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 (VIN = 3.4V, control inputs only); I and Y pins do not contribute to ICC.
Switching Characteristics over Operating Range
Parameters Description
tIY
t SY
t PZH
t PZL
t PHZ
t PLZ
Conditions(1)
Propagation Delay(2,3) CL = 50pF
In to Yn
RL = 500Ω
Bus Select Time
Sn to Yn
Bus Disable Time
E to Yn
Bus Disable Time
E to Yn
PI3B33X257
Com.
Min.
Max.
Units
0.25
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 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.
Ordering Information
Part Numbe r
Pin / Package
Te mpe rature
PI33X257B
48- BQ SO P (B48)
–40°C to +85°C
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
3
PS8334A
09/28/99