PI5C32EX2245BEX [PERICOM]
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 8-Bit, True Output, CMOS, PDSO40, 0.150 INCH, PLASTIC, BQSOP-40;
| 型号： | PI5C32EX2245BEX |
| 厂家： | 
PERICOM SEMICONDUCTOR CORPORATION |
| 描述： | Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 8-Bit, True Output, CMOS, PDSO40, 0.150 INCH, PLASTIC, BQSOP-40 光电二极管 |
| 文件： | 总4页 (文件大小：500K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
PI5C32X2245
16-Bit, 2-Port BusSwitch
with 25Ω Series Resistor
Features:
Description:
• Near-Zero propagation delay
Pericom Semiconductor’s 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 25Ω resistor to
reduce noise resulting from reflections, thus eliminating the need
for an external terminating resistor.
• 25Ω series resistor termination
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• Ultra-low quiescent power (0.2µA typical)
– Ideally suited for notebook applications
• Pin compatible with QS32X245
• Industrial operating temperature: –40°C to +85°C
• Packaging (Pb-free & Green available):
– 40-pin 150-mil wide plastic BQSOP (B)
Block Diagram
Pin Configuration
�
ꢁ
ꢂꢁ
ꢂꢀ
�ꢀ
ꢂꢃꢄ
�ꢆ
ꢂꢆ
�ꢄꢅ
ꢂꢃꢇ
ꢂꢄꢅ
(1)
Truth Table
Function
Pin Description
BEn
H
A0–15
Pin Name
I/O
Description
Disconnect
Hi-Z
BEn
I
Bus Enable Input (Active LOW)
Connect
Note:
L
B0–15
A0-A15
B0-B15
I/O
I/O
Bus A
Bus B
1. H = High Voltage Level, L = Low Voltage Level,
Hi-Z = High Impedance
1
PS8195B
05/11/06
06-0237
PI5C32X2245
16-Bit, 2-P ort Bus Switch
with 25Ω Series Resistor
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Storage Temperature ............................................................–65°C to +150°C
Ambient Temperature with Power Applied ...........................–40°C to +85°C
Stresses greater than those listed under MAXIMUM RAT-
INGS 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 ex-
tended periods may affect reliability.
Supply Voltage to Ground Potential (Inputs & V Only).....–0.5V to +7.0V
CC
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
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±10%)
(1)
(2)
Parameters
Description
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
Test Conditions
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
Min.
2.0
Typ
Max. Units
V
IH
V
V
–0.5
0.8
IL
I
IH
V
V
= Max., V = V
CC
±1
CC
CC
IN
I
= Max., V = GND
±1
±1
µA
IL
IN
CC
I
High Impedance Output Current 0 ≤ A, B ≤ V
Clamp Diode Voltage = Min., I = –18 mA
OZH
V
IK
V
–0.7
–1.2
V
CC
IN
(3)
I
OS
Short Circuit Current
A (B) = 0V, B (A) = V
100
mA
CC
V
Input Hysteresis at Control Pins
150
mV
Ω
H
V
V
= Min., V = 0.0V, I = 48 mA
28
35
40
48
CC
CC
IN
ON
(4)
R
OH
Switch On-Resistance
= Min., V = 2.4V, I = 15 mA
IN
ON
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.
Capacitance (TA = 25°C, f = 1 MHz)
(1)
Parameters
CIN
Description
Test Conditions
Typ
6
Units
Input Capacitance
COFF
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
VIN = 0V
6
pF
CON
12
Notes:
1. This parameter is determined by device characterization but is not production tested.
PS8195B
05/11/06
2
06-0237
PI5C32X2245
16-Bit, 2-P ort Bus Switch
with 25Ω Series Resistor
Power Supply Characteristics
(1)
(2)
Parameters
Description
Test Conditions
Min.
Typ
Max.
Units
Quiescent Power
Supply Current
I
V
V
= Max.
V
V
= GND or V
CC
0.1
3.0
µA
CC
CC
CC
IN
IN
Supply Current per
Input @ TTL HIGH
(3)
ΔI
= Max.
= 3.4V
2.5
mA
CC
VCC = Max.,
A and B Pins Open
BEn = GND
Control Input Toggling
50% Duty Cycle
Supply Current per
Input per MHz
mA/
MHz
I
0.25
CCD
(4)
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.
Switching Characteristics over Operating Range
Com.
Parameters
Description
Conditions
Unit
Min.
Max.
(1,2)
t
Propagation Delay
PLH
1.25
t
Ax to Bx, Bx to Ax
PHL
t
t
Bus Enable Time
BEX to Ax or Bx
C = 50pF
L
R = 500Ω
L
PZH
1.5
1.5
7.5
5.5
ns
PZL
t
Bus Disable Time
BEx to Ax or Bx
PHZ
t
PLZ
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. 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.
PS8195B
05/11/06
3
06-0237
PI5C32X2245
16-Bit, 2-P ort Bus Switch
with 25Ω Series Resistor
Packaging Mechanical: 40-pin BQSOP (B)
X.XX
DENOTES DIMENSION IN MILLIMETERS
X.XX
Ordering Information
Ordering Code
PI5C32X2245B
PI5C32X2245BE
Package Code
Package Description
B
B
40-pin BQSOP
Pb-free & Green, 40-pin BQSOP
Notes:
•
•
Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
E = Pb-free & Green
• Adding an X suffix = Tape/Reel
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
PS8195B
05/11/06
4
06-0237
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