PI5C34X2245BE

03$
PI5C34X2245
Block Diagram
Pin Conguration
$ESCRIPTION
Pericom Semiconductors PI5C34X2245 is a 32-bit,
2-port bus switch. Four enable signals (BEn)
turn the switches on. The bus switch creates no
additional propagational delay or additional ground bounce noise.
The device has a built-in 25Ω resistor to reduce noise resulting
from reflection, thus eliminating the need for an external
terminating resistor.
32-Bit, 2-Port Bus Switch
with 25Ω Series Resistor
BE
1
A
7
A
0
B
7
B
0
BE
2
A
15
A
8
B
15
B
8
BE
3
A
23
A
16
B
23
B
16
BE
4
A
31
A
24
B
31
B
24

 























































 

































































Features
Near-Zero propagation delay
25Ω series resistor termination
5Ω switches connect inputs to outputs
Direct bus connection when switches are ON
Ultra-low quiescent power (0.2μA typical)
– Ideally suited for notebook applications
Pin compatible with QS34X245
Industrial operating temperature: –40°C to +85°C
Packaging (Pb-free & Green available):
– 80-pin 150 mil wide BQSOP (B)
06-0238
03$
PI5C34X2245
32-Bit, 2-Port BusSwitch
with 25Ω Series Resistor
Storage Temperature ............................................................ –65°C to +150°C
Ambient Temperature with Power Applied ........................... –40°C to +85°C
Supply Voltage to Ground Potential .......................................–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 con-
ditions above those indicated in the operational
sections of this specication is not implied. Exposure to
absolute maximum rating conditions for extended periods
may affect reliability.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
DC Electrical Characteristics (Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 5V ±10%)
Parameters Description Test Conditions
(1)
Min. Typ
(2)
Max. Units
V
IH
Input HIGH Voltage Guaranteed Logic HIGH Level 2.0
V
V
IL
Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8
I
IH
Input HIGH Current V
CC
= Max., V
IN
= V
CC
±1
μA
I
IL
Input LOW Current V
CC
= Max., V
IN
= GND ±1
I
OZH
High Impedance Output
Current
0 - A, B - V
CC
±1
V
IK
Clamp Diode Voltage V
CC
= Min., I
IN
= –18mA –0.7 –1.2 V
I
OS
Short Circuit Current
(3)
A (B) = 0V, B (A) = V
CC
100 mA
R
ON
Switch On-Resistance
(4)
V
CC
= Min., V
IN
= 0V, I
ON
= 48mA 28 40
Ω
V
CC
= Min., V
IN
= 2.4V, I
ON
= 15mA 35 48
Notes:
1. For Max. or Min. conditions, use appropriate value specied under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 5.0V, T
A
= 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.
Truth Table
(1)
Function BEn A0 – 31
Disconnect H Hi-Z
Connect L B0 – 3
Notes:
1. H = High Voltage Level, L = Low Voltage Level
Hi-Z = High Impedance
Pin Description
Pin Name I/O Description
BE
X
I Bus Enable Input (Active LOW)
A
0
-A
31
I/O Bus A
B
0
-B
31
I/O Bus B
06-0238
03$
PI5C34X2245
32-Bit, 2-Port BusSwitch
with 25Ω Series Resistor
Switching Characteristics over Operating Range
Parameter Description Conditions
Com.
Units
M i n . M a x .
t
PLH
t
PHL
Propagation Delay
(1,2)
Ax to Bx, Bx to Ax
C
L
= 50pF
R
L
= 500Ω
1.25
ns
t
PZH
t
PZL
Bus Enable Time BEx to Ax or Bx 1.5 7.5
t
PHZ
t
PLZ
Bus Disable Time BEx to Ax or Bx 1.5 5.5
Power Supply Characteristics
Parameters Description Test Conditions
(1)
Min. Typ
(2)
Max. Units
I
CC
Quiescent Power Supply Current V
CC
= Max.
V
IN
= GND or
V
CC
0.1 3.0 μA
I
CC
Supply Current per Input @ TTL HIGH V
CC
= Max. V
IN
= 3.4V
(3)
2.5 mA
I
CCD
Supply Current per Input per MHz
(4)
V
CC
= Max.,
A & B Pins Open
BEn = GND,
Control Input Tog-
gling
50% Duty Cycle
0.25
mA/
MHz
Notes:
1. For Max. or Min. conditions, use appropriate value specied under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 5.0V, +25°C ambient.
3. Per TTL driven input (V
IN
= 3.4V, control inputs only); A and B pins do not contribute to I
CC
.
4. This current applies to the control inputs only and represent the current required to switch internal capacitance at the specied frequency. The
A and B inputs generate no signicant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
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.
Capacitance (T
A
= 25°C, f = 1 MHz)
Parameters
(1)
Description Test Conditions Type Units
C
IN
Input Capacitance
V
IN
= 0V
6
pFC
OFF
A/B Capacitance, Switch Off 6
C
ON
A/B Capacitance, Switch On 12
Notes:
1. This parameter is determined by device characterization but is not production tested.
06-0238

PI5C34X2245BE

Mfr. #:
Manufacturer:
Diodes Incorporated
Description:
Digital Bus Switch ICs 32 Bit Bus Switch 2-Port
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
T/T Paypal Visa MoneyGram Western Union

Products related to this Datasheet