ETC PI5C32X2245B

PI5C32X2245
16-BIT, 2-PORT BusSwitch
Ω Series Resistor
with 25Ω
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PI5C32X2245
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16-Bit, 2-Port BusSwitch
Ω Series Resistor
with 25Ω
Product Features:
•
•
•
•
•
Near-zero propagation delay
25ohm series resistor termination
5ohm switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2 µA typical)
– Ideally suited for notebook applications
• Pin compatible with QS32X245
• Industrial operating temperature: –40°C to +85°C
• Packages available:
– 40-pin 150 mil wide plastic BQSOP (B)
Product Description:
Logic Block Diagram
Product Pin Configuration
Pericom Semiconductor’s PI5C series of logic circuits are pro-duced
in the Company’s advanced submicron CMOS technology.
The PI5C32X2245 is a 16-bit, 2-port bus switch . Two enable signals
(BEn) turn the switches on. The bus switch creates no additional
propagational delay or additional ground bounce noise. The device
has a built-in 25ohm resistor to reduce noise resulting from
reflections, thus eliminating the need for an external terminating
resistor.
40-Pin
B
Truth Table(1)
Product Pin Description
Function
BEn A0–15
Disconnect
H
Hi-Z
Connect
L
B0–15
Note:
1. H= High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Pin Name
BEn
A0-A15
B0-B15
1
I/O
I
I/O
I/O
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
PS8195
05/05/98
PI5C32X2245
16-BIT, 2-PORT BusSwitch
Ω Series Resistor
with 25Ω
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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
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 ............................................................................ 120 mA
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 = 5V ±10%)
Parameters Description
Test Conditions(1)
Min.
Typ(2)
Max.
Units
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
–
–
V
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
–0.5
–
0.8
V
IIH
Input HIGH Current
VCC = Max., VIN = VCC
–
–
±1
µA
IIL
Input LOW Current
VCC = Max., VIN = GND
–
–
±1
µA
IOZH
High Impedance Output Current
0 ­ A, B ­ VCC
–
–
±1
µA
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18 mA
–
–0.7
–1.2
V
IOS
Short Circuit Current
A (B) = 0V, B (A) = VCC
100
–
–
mA
VH
Input Hysteresis at Control Pins
–
150
–
mV
RON
Switch On Resistance
–
–
28
35
40
48
ohm
ohm
(3)
(4)
VCC = Min., VIN = 0.0V, ION = 48 mA
VCC = Min., VIN = 2.4V, ION = 15 mA
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
6
6
pF
pF
CON
A/B Capacitance, Switch On
VIN = 0V
12
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 = 5.0V, 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
PS8195
05/05/98
PI5C32X2245
16-BIT, 2-PORT BusSwitch
Ω Series Resistor
with 25Ω
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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 = 3.4V(3)
ICCD
Supply Current per
Input per MHz(4)
VCC = Max.,
A and B Pins Open
BEn = GND
Control Input Toggling
50% Duty Cycle
Typ(2)
Max.
Units
0.1
3.0
µA
2.5
mA
0.25
mA/
MHz
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at Vcc = 5.0V, +25°C ambient.
3. Per TTL driven input (VIN = 3.4V, control inputs 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.
PI5C32X2245 Switching Characteristics over Operating Range
Parameters Description
t PLH
t PHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BEX to Ax or Bx
Bus Disable Time
BEx to Ax or Bx
Conditions(1)
CL = 50 pF
RL = 500ohm
PI5C32X2245
Com.
Min.
Max.
—
1.25
1.5
7.5
1.5
5.5
Unit
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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
3
PS8195
05/05/98