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PS8191D 05/03/00
Product Description
Pericom Semiconductors PI3C series of logic circuits are produced
using the Companys advanced submicron CMOS technology,
achieving industry leading performance.
The PI3C6800 is a 10-bit bus switch with low on-state resistance.
The bus switch creates no additional propagation delay. To minimize
live-insertion noise, the device also precharges the B port to a user-
selectable bias voltage (BIASV).
The switch is turned on by a single enable (ON) input. When ON
is LOW, the switch is on and port A is connnected to port B. When
ON is HIGH, the switch between port A and port B is open and
the B port is precharged to BIASV through the equivalent of a
10-k
resistor.
V
CC
B1
B2
B3
B4
B5
B6
B7
B8
B9
B10
BIASV
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
ON
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
GND
Product Pin Configuration
Function
ON
B1 - B10
Connect
L
A1 - A10
Precharge
H
B
IASV
Truth Table
(1)
Note:
1. H = High Voltage Level
L = Low Voltage Level
Logic Diagram
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PI3C6800
2.5V/3.3V, 2-Port, 10-Bit Bus Switch
with Precharged Outputs
for Live Insertion
Product Features
Near zero propagation delay
5
switch connection between two ports
High Bandwidth (>400 MHz)
Rail-to-Rail 3.3V or 2.5V Switching
Outputs are precharged by bias voltage to
minimize signal distortion during live insertion
5V I/O Tolerant
2.5V Supply Voltage Operation
Package options:
24-pin 150 mil wide plastic QSOP (Q)
24-pin 173 mil wide TSSOP (L)
24-Pin
L, Q
ON
A10
A1
13
23
14
B1
B10
2
PS8191D 05/03/00
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PI3C6800
2.5V/3.3V, 2-Port, 10-Bit Bus Switch with
Precharged Outputs for Live Insertion
Electrical Characteristics
(Over Recommended Operating Free-air Temperature Range)
Storage Temperature ........................................ 65C to +150C
Supply Voltage Range .......................................... 0.5V to 4.6V
DC Input Voltage
(1)
...............................................0.5V to +7V
Input Clamp Current, I
IK
(V
1
< 0) .....................................50mA
DC Output Current ......................................................... 120 mA
Power Dissipation
(2)
..........................................................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.
Notes:
1. Input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.
2. Maximum package power dissipation is calculated using a junction temperatue of 150C and a board trace length of 750 mils.
Absolute Maximum Ratings Over Free-Air Temperature Range
*
(Above which the useful life may be impaired. For user guidelines, not tested.)
Notes:
* Measured by the voltage drop between the A and B terminals at the indicated current through the switch.
On-state resistance is determined by the lower of the voltages of the two (A or B) terminals.
This is the increase in supply current for control input.
All typical values are at V
CC
= 3.3V, T
A
= 25C.
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Recommended Operating Conditions
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PS8191D 05/03/00
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PI3C6800
2.5V/3.3V, 2-Port, 10-Bit Bus Switch with
Precharged Outputs for Live Insertion
3.3V Switching Characteristics
(Over Recommended Operating Free-air Temperature Range, C
L
= 50pF)
Note:
1. This parameter is warranted but not production tested. The propagation delay is based on the RC time constant of the typical on
state resistance of the switch and a load capacitance of 50pF, when driven by an ideal voltage source (zero output impedance).
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1
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L
P
V
3
=
V
S
A
I
B
5
.
1
5
.
5
2.5V Switching Characteristics
(Over Recommended Operating Free-air Temperature Range, C
L
= 50pF)
4.0
2.0
0.0
0.0
1.0
2.0
3.0
4.0
5.0
V
OUT
, (V)
VIN, (V)
VCC =
3.3V
3.1V
2.9V
2.7V
2.5V
2.3V
3.6V
3.8V
3.4V
3.2V
3.0V
2.8V
Output Voltage vs. Input Voltage over Various Supply Voltages
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Output Voltage vs. Input Voltage over Various Supply Voltages
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PS8191D 05/03/00
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PI3C6800
2.5V/3.3V, 2-Port, 10-Bit Bus Switch with
Precharged Outputs for Live Insertion
Parameter Measurements
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
t
s
e
T
1
S
t
D
P
n
e
p
O
t
Z
L
P
t/
L
Z
P
V
6
t
Z
H
P
t/
H
Z
P
D
N
G
Notes:
1. C
L
includes probe and jig capacitance.
2. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control.
3. All input pulses are supplied by generators having the following characteristics: PRR<10MHz, Z
O
= 50
,
t
R
2.5ns, t
F
2.5ns.
4. The outputs are measured one at a time with one transition per measurement.
5. t
PLZ
and t
PHZ
are the same as t
DIS
.
6. t
PZL
and t
PZH
are the same as t
EN
.
7. t
PLH
and t
PHL
are the same as t
PD
.
t
PZL
Output
Control
(Low Level
Enabling)
0V
1.5V
1.5V
1.5V
1.5V
t
PLZ
t
PHZ
V
OL
3.5V
0V
t
PZH
+0.3V
-0.3V
Output
Waveform 1
S1 at 6V
(see Note 2)
Output
Waveform 2
S1 at Open
(see Note 2)
V
OH
V
OH
V
OL
3V
500
500
GND
6V
Open
S1
LOAD CIRCUIT
From Output
Under Test
CL = 50pF
(See note 1)
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PI3C6800
2.5V/3.3V, 2-Port, 10-Bit Bus Switch with
Precharged Outputs for Live Insertion
Applications Information
Logic Inputs
The logic control inputs can be driven up to +3.6V regardless of the
supply voltage. For example, given a +3.3V supply, IN may be driven
low to 0V and high to 3.6V. Driving IN Rail-to-Rail minimizes power
consumption.
Power-Supply Sequencing
Proper power-supply sequencing is recommended for all CMOS
devices. Always apply V
CC
before applying V
BIAS
and signals to
input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
24-Pin TSSOP (L) Package
24-Pin QSOP (Q) Package
t
r
a
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e
g
a
k
c
a
P
-
n
i
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r
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L
0
0
8
6
C
3
I
P
)
L
(
P
O
S
S
T
-
4
2
C
5
8
o
t
C
0
4
Q
0
0
8
6
C
3
I
P
)
Q
(
P
O
S
Q
-
4
2
C
5
8
o
t
C
0
4
Ordering Information
.303
.311
.047
1.20
.002
.006
SEATING
PLANE
.0256
BSC
.018
.030
.004
.008
.252
BSC
1
24
.169
.177
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
0.05
0.15
6.4
0.45
0.75
0.09
0.20
4.3
4.5
7.7
7.9
0.65
0.19
0.30
.007
.012
Max
.337
.344
.053
.069
.004
.010
SEATING
PLANE
.025
typical
.007
.010
.228
.244
1
24
.150
.157
.016
.050
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
0.635
8.56
8.74
1.35
1.75
5.79
6.20
0.406
1.27
0.101
0.254
.008
.012
0.203
0.305
3.81
3.99
0.178
0.254
.033
0.84
0.38
.015 x 45
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