ETC PI3C3861Q

PI3C3861
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2.5V/3.3V, High Bandwidth, Hot Insertion,
10-Bit, 2-Port, BusSwitch
Product Features
Product Description
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Pericom’s Semiconductor’s PI3C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
The PI3C3861 is a 10-bit, 2.5V or 3.3 volt, 2-port bus switch designed
with a low ON resistance (5Ω) allowing inputs to be connected
directly to outputs. The bus switch creates no additional
propagational delay or additional ground bounce noise. The switches
are turned ON by the Bus Enable (BE) input signal. This device is
very userful in switching signals that have high bandwidth (>400
MHz).
Near zero propagation delay
5Ω switches connect inputs to outputs
High bandwidth (>400 MHz)
Rail-to-rail 2.5V or 3.3V switching
5V I/O Tolerant
2.5V Supply Voltage Operation
Permits Hot Insertion
Available Packages:
– 24-pin 150 mil wide plastic QSOP (Q)
– 24-pin 173 mil wide plastic TSSOP (L)
Applications
• High bandwidth data switching
• Hot Docking
Product Pin Configuration
Logic Block Diagram
A0
B0
A9
NC
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
GND
B9
BE
Truth Table(1)
Function
Disconnect
Connect
1
2
3
4
5
6
7
8
9
10
11
12
24-Pin
L,Q
24
23
22
21
20
19
18
17
16
15
14
13
Vcc
BE
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
Product Pin Description
BE
H
L
A0–9
Hi-Z
B0–9
Pin Name
BE
A0–8
B0–8
GND
VCC
Note:
H
= High Voltage Level
L
= Low Voltage Level
Hi-Z = High Impedance
1
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
PS8198B 12/10/99
PI3C3861
2.5V/3.3V, High Bandwidth,
Hot Insertion,10 -Bit, 2-Port, BusSwitch
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature .......................................................... –65°C to +150°C Note:
Stresses greater than those listed under MAXIMUM
Ambient Temperature with Power Applied ............................. –40°C to +85°C RATINGS may cause permanent damage to the device.
Supply Voltage to Ground Potential (Inputs & Vcc Only) ........ –0.5V to +4.6V This is a stress rating only and functional operation
Supply Voltage to Ground Potential (Outputs & D/O Only) ..... –0.5V to +4.6V of the device at these or any other conditions above
those indicated in the operational sections of this
DC Input Voltage .................................................................... –0.5V to +5.5V specification is not implied. Exposure to absolute maxiDC Output Current ..............................................................................120mA mum rating conditions for extended periods may affect
Power Dissipation .................................................................................. 0.5W reliability.
DC Electrical Characteristics (Over Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Parameters Description
Test Conditions(1)
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 ≤ A, B ≤ VCC
VIK
Clamp Diode Voltage
RON
Switch On Resistance
0.8
V
µA
±1
VCC = Min., IIN = –18mA
(4)
Units
VCC = Min., VIN = 0.0V, ION = 48mA
VCC = Min., VIN = 2.4V, ION = 15mA
–0.73
– 1.2
V
5
8
7
15
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5)
Description
Test Conditions
Typ
Units
CIN
COFF
Input Capacitance
A/B Capacitance, Switch Off
VIN = 0V
VIN = 0V
3.5
5.0
pF
CON
A/B Capacitance, Switch On
VIN = 0V
10.0
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. Not more than one output should be shorted at one time. Duration of the test should not exceed one second.
4. 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.
5. This parameter is determined by device characterization but is not production tested.
2
PS8198B 12/10/99
PI3C3861
2.5V/3.3V, High Bandwidth,
Hot Insertion,10 -Bit, 2-Port, BusSwitch
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Power Supply Characteristics
Parameters Description
Test Conditions(1)
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.
260
500
Units
1
µA
2
750
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.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specified
frequency. The A and B inputs generate no significant AC or DC currents as they transition. This parameter is not tested, but is
guaranteed by design.
3
Switching Characteristics over 3.3V Operating Range
5
4
PI3C3861
Com.
Parame te rs
D e s cription
tPLH
tPHL
Propagation Delay (2,3)
Ax to Bx, Bx to Ax
tPZH
tPZL
Bus Enable Time
BE to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BE to Ax or Bx
Conditions
M in.
M ax.
Units
6
ns
7
0.25
CL = 50pF, RL = 500Ω
1.5
6.5
1.5
5.5
8
9
Switching Characteristics over 2.5V Operating Range
PI3C3861
10
Com.
Parame te rs
D e s cription
tPLH
tPHL
Propagation Delay ( 2 , 3 )
Ax to Bx, Bx to Ax
tPZH
tPZL
Bus Enable Time
BE to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BE to Ax or Bx
Conditions
M in.
M ax.
Units
11
0.25
CL = 50pF, RL = 500Ω
1.5
9.8
1.5
8.3
12
ns
13
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.
3
14
15
PS8198B
12/10/99
PI3C3861
2.5V/3.3V, High Bandwidth,
Hot Insertion,10 -Bit, 2-Port, BusSwitch
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4.0
VCC = 3.3V
3.1V
2.9V
2.7V
2.5V
VOUT, (V)
2.3V
3.8V
3.6V
3.4V
3.2V
3.0V
2.8V
2.0
0.0
0.0
1.0
3.0
2.0
4.0
5.0
VIN, (V)
OutputVoltage
Voltage vs.
vs. Input
over
Various
Supply
Voltages
Output
InputVoltage
Voltage
over
Various
Supply
Voltages
Ordering Information
Part
Pin - Package
Dime ns ions
PI3C3861L
24 - TSSOP (L)
–40°C to +85°C
PI3C3861Q
24 - QSOP (Q )
–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
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PS8198B 12/10/99