Product Features
• Near zero propagation delay
• 5Ω switches with 25Ω series resistor connect inputs
to outputs
• Direct bus connection when switches are ON
• Ultra Low Quiescent Power (0.2µA Typical)
– Ideally suited for notebook applications
• Packages available:
– 24-pin 150 mil wide plastic QSOP (Q)
– 24-pin 300 mil wide plastic SOIC (S)
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C32861
10-Bit, 2-Port Bus Switch
with 25Ω Series Resistor
Ω
PI5C32861
10-Bit, 2-Port Bus Switch
Ω
with 25Ω Series Resistor
1
2
3
4
5
6
Product Description
Pericom Semiconductors PI5C series of logic circuits are produced
using the Companys advanced 0.8 micron CMOS technology,
achieving industry leading performance.
The PI5C32861 is a 10-bit, 2-port bus switch designed with a low
ON resistance that permits 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. The PI5C32861 is designed
with an internal 25Ω resistor that reduces noise reflection in high-
speed applications
Logic Block Diagram
Product Pin Configuration
NC
A
0
B
0
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
GND
A
9
B
9
1
24
2
23
3
22
4
21
5
24-PIN
20
Q24
19
6
S24
18
7
8
17
9
16
10
15
11
14
12
13
VCC
BE
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
7
8
9
10
Product Pin Description
BE
Truth Table
(1)
Function
Disconnect
Connect
Note:
BE
H
L
A
0–9
Hi-Z
B
0–9
Pin Name
BE
A
0
–
9
B
0
–
9
GND
V
CC
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
11
12
13
14
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
15
1
PS8104
03/14/97
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C32861
10-Bit, 2-Port Bus Switch
with 25Ω Series Resistor
Ω
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 ............................................................................ 120mA
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 specifica-
tion is not implied. Exposure to absolute maximum
rating conditions for extended periods may affect
reliability.
DC Electrical Characteristics
(Over the Operating Range, T
A
= –40°C to +85°C, V
CC
= 5V ±5%)
Parameters Description
V
IH
V
IL
I
IH
I
IL
I
OZH
V
IK
I
OS
V
H
R
ON
Input HIGH Voltage
Input LOW Voltage
Input HIGH Current
Input LOW Current
High Impedance Output Current
Clamp Diode Voltage
Short Circuit Current
(3)
Input Hysteresis at Control Pins
Switch On Resistance
(4)
V
CC
= Min., V
IN
= 0.0V, I
ON
= 48mA
V
CC
= Min., V
IN
= 2.4V, I
ON
= 15mA
18
18
Test Conditions
(1)
Guaranteed Logic HIGH Level
Guaranteed Logic LOW Level
V
CC
= Max., V
IN
= V
CC
V
CC
= Max., V
IN
= GND
0 - A, B - V
CC
V
CC
= Min., I
IN
= –18mA
A (B) = 0V, B (A) = V
CC
100
150
28
35
40
48
–0.7
Min.
2.0
–0.5
0.8
±1
±1
±1
–1.2
Typ
(2)
Max.
Units
V
V
µA
µA
µA
V
mA
mV
Ω
Capacitance
(T
A
= 25°C, f = 1 MHz)
Parameters
(5)
C
IN
C
OFF
C
ON
Description
Input Capacitance
A/B Capacitance, Switch Off
A/B Capacitance, Switch On
Test Conditions
V
IN
= 0V
V
IN
= 0V
V
IN
= 0V
Typ
Max.
6
6
8
Units
pF
pF
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, 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.
5. This parameter is determined by device characterization but is not production tested.
2
PS8104 03/14/97
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C32861
10-Bit, 2-Port Bus Switch
with 25Ω Series Resistor
Ω
Power Supply Characteristics
Parameters Description
I
CC
∆I
CC
I
CCD
Quiescent Power
Supply Current
Supply Current per
Input @ TTL HIGH
Supply Current per
Input per MHz
(4)
Test Conditions
(1)
V
CC
= Max.
V
CC
= Max.
V
CC
= Max.,
A and B Pins Open
BE = GND
Control Input Toggling
50% Duty Cycle
V
IN
= GND or V
CC
V
IN
= 3.4V
(3)
Min.
Typ
(2)
0.1
Max.
10
2.5
0.25
Units
µA
1
2
mA
mA/
MHz
3
4
5
6
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 (V
IN
= 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
PI5C32861
Com.
7
Max
Units
Parameters
t
PLH
t
PHL
t
PZH
t
PZL
t
PHZ
t
PLZ
Description
Propagation Delay
(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BE to Ax or Bx
Bus Disable Time
BE to Ax or Bx
Conditions
(1)
C
L
= 50pF
R
L
= 500Ω
Min
8
9
1.25
1.5
1.5
6.5
5.5
ns
ns
ns
10
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 1.25ns 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.
11
12
13
14
15
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
3
PS8104
03/14/97
京公网安备 11010802033920号
EEWORLD
