PI5C32X2245BE [PERICOM]
Bus Driver, CBT/FST/QS/5C/B Series, 2-Func, 8-Bit, True Output, CMOS, PDSO40, 0.150 INCH, GREEN, PLASTIC, BQSOP-40;
| 型号： | PI5C32X2245BE |
| 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, GREEN, PLASTIC, BQSOP-40 |
| 文件： | 总3页 (文件大小：123K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
CX
PI5C32X2245
16-Bit, 2-Port BusSwitch
with 25Ω Series Resistor
Product Features:
• Near-zero propagation delay
Product Description:
Pericom Semiconductor’s PI5C series of logic circuits are pro-
duced in the Company’s advanced 0.6 micron CMOS technology.
• 25Ω series resistor termination
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
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 25Ω resistor to reduce noise resulting
from reflections, thus eliminating the need for an external
terminating resistor.
• 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)
Logic Block Diagram
Product Pin Configuration
40-PIN
B
Truth Table(1)
Product Pin Description
Function
Disconnect
Connect
BEn A0–15
Pin Name
BEn
I/O
I
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
H
L
Hi-Z
A0-A15
B0-B15
I/O
I/O
B0–15
Note:
1. H= High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
164
PS8195
05/05/98
PI5C32X2245
16-BIT, 2-PORT BusSwitch
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
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
Stresses greater than those listed under MAXIMUM
RATINGS may cause permanent damage to the de-
vice. This is a stress rating only and functional opera-
tion of the device at these or any other conditions
above those indicated in the operational sections of
thisspecificationisnotimplied. Exposuretoabsolute
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
VIL
IIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
VCC = Max., VIN = VCC
VCC = Max., VIN = GND
0 - A, B - VCC
2.0
–0.5
–
–
–
0.8
±1
±1
±1
–1.2
–
V
V
Input LOW Voltage
–
Input HIGH Current
–
–
µA
µA
µA
V
IIL
Input LOW Current
–
IOZH
VIK
IOS
High Impedance Output Current
Clamp Diode Voltage
–
–
VCC = Min., IIN = –18 mA
A (B) = 0V, B (A) = VCC
–
–0.7
–
Short Circuit Current(3)
Input Hysteresis at Control Pins
Switch On Resistance(4)
100
–
mA
mV
VH
150
–
RON
VCC = Min., VIN = 0.0V, ION = 48 mA
VCC = Min., VIN = 2.4V, ION = 15 mA
–
–
28
35
40
48
Ω
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5)
Description
Test Conditions
Typ
Units
CIN
Input Capacitance
VIN = 0V
VIN = 0V
6
6
pF
pF
COFF
A/B Capacitance, Switch Off
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.
165
PS8195
05/05/98
PI5C32X2245
16-BIT, 2-PORT BusSwitch
with 25Ω Series Resistor
Power Supply Characteristics
Parameters Description
Test Conditions(1)
Min. Typ(2) Max. Units
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
0.1
3.0
µA
∆ICC
ICCD
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.4V(3)
2.5
mA
Supply Current per
Input per MHz(4)
VCC = Max.,
A and B Pins Open
BEn = GND
0.25
mA/
MHz
Control Input Toggling
50% Duty Cycle
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
PI5C32X2245
Com.
Parameters Description
Conditions(1)
Min.
Max.
Unit
tPLH
tPHL
tPZH
tPZL
tPHZ
t
PLZ
Propagation Delay(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
C
L
L
= 50 pF
—
1.25
R
= 500Ω
1.5
1.5
7.5
5.5
ns
BEX to Ax or Bx
Bus Disable Time
BEx to Ax or Bx
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
166
PS8195
05/05/98
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