21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C
20-Bit, Hot Insertion, BusSwitch with
Precharged Outputs & Undershoot Protection
Product Description
Pericom Semiconductors PI5C series of logic circuits are produced
using the companys advanced submicron CMOS technology.
Product Features
Undershoot protection up to 1.5V, 25ns width
Near zero propagation delay
5 Ohm switches connect between two ports
Fast switching speed: 4.5ns max.
Permits hot insertion
Isolation during power-off conditions
B-Port outputs are precharged by bias voltage
to minimize signal distortion during live insertion.
Package options include:
- 48-pin 150-mil wide plastic BQSOP (B)
- 48-pin 240-mil wide plastic TSSOP (A)
The PI5C16215C provides 20-bits of high-speed bus switching. The
low on-state resistance of the switch allows connections to be made
with minimal propagation delay. The device also precharges the
B-port to a user-selectable bias voltage (BIASV) to minimize live-
insertion noise. The device incorporates an internal charge pump
to handle input undershoot of up to 1.5V and 25ns width.
The device is organized as dual 10-bit bus switches with individual
output-enable (OE) inputs. When OE is low, the corresponding
10-bit bus switch is on and port A is connected to port B. When OE
is high, the switch is open, a high-impedance state exists between
the two ports, and port B is precharged to BIASV through the
equivalent of a 10-k ohm resistor.
To ensure the high-impedance state on power up or power down,
OE should be tied to V
CC
through a pullup resistor; the minimum
value of the resistor is determined by the current-sinking capability
of the driver connected to OE.
Logic Block Diagram
1
2
46
BIASV
1B1
1A1
SW
Product Pin Configuration
1A10
12
SW
36
1B10
BIASV
1
A
1
1
A
2
1
A
3
1
A
4
1
A
5
1
A
6
1OE
48
1
2
3
4
5
6
7
8
9
48
47
46
45
44
43
42
41
40
1
O
E
2
O
E
1
B
1
1
B
2
1
B
3
1
B
4
1
B
5
2A1
13
SW
35
2B1
GND
1
A
7
1
A
8
GND
1
B
6
1
B
7
1
B
8
1
B
9
1
B
10
1
A
9
2A10
24
SW
25
2B10
1
A
10
2
A
1
2
A
2
2OE
47
V
CC
2
A
3
10
39
11
38
12
48-Pin
37
A,B
36
13
14
35
15
34
16
33
17
18
19
20
21
22
23
24
32
31
30
29
28
27
26
25
2
B
1
2
B
2
2
B
3
GND
2
A
4
2
A
5
2
A
6
GND
2
B
4
2
B
5
2
B
6
A
B
2
A
7
2
A
8
2
A
9
2
B
7
2
B
8
2
B
9
OE
2
A
10
2
B
10
1
PS8369B
12/15/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C
20-Bit, Hot Insertion, BusSwitch with
Precharged Outputs & Undershoot Protection
Absolute Maximum Ratings Over Free-Air Temperature Range
(Above which the useful life may be impaired. For user guidelines, not tested.)
Storage Temperature ..................................... 65°C to +150°C
Supply Voltage Range ........................................ 0.5V to +7V
DC Input Voltage
(1) ......................................................
0.5V to +7V
Input Clamp Current, I
IK
(V
I
<0) ................................. 50mA
DC Output Current ....................................................... 120mA
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. The input and output negative-voltage ratings may be exceeded
if the input and output clamp-current ratings are observed.
2. The maximum package power dissipation is calculated using a
junction temperatue of 150°C and a board trace length of 750
mils.
Recommended Operating Conditions
(Over Recommended Operating Free-air Temperature Range)
Parame te r
V
CC
BIASV
V
IH
V
IL
T
A
Parame te r
V
IK
I
I
I
O
I
CC
∆I
CC
E
Control pins
C
I
Control pins
C
O
(OFF)
r
ON
*
V
CC
= 4.5V
V
CC
= 4.5V
V
CC
= 5.5V
V
CC
= 4.5V
V
CC
= 5.5V
V
CC
= 5.5V
V
I
=3V or 0
V
O
=3V or 0
V
CC
= 4V
Switch Off
V
I
= 2.4V
V
I
= 0,
V
I
= 0,
V
I
= 2.4V
I
I
= 15mA
I
I
= 64mA
I
I
= 30mA
I
I
= 15mA
De s cription
Supply voltage
Supply voltage
High- Level input voltage
Low- level input voltage
Operating free- air temperature
M in.
4
1.3
2
M ax.
5.5
V
CC
0.8
Units
V
40
85
Typ
=
°C
Electrical Characteristics
(Over Recommended Operating Free-air Temperature Range)
Te s t Conditions
I
I
= 18mA
V
I
= 5.5V or GND
BIASV = 2.4V
I
O
= 0
V
O
= 0
V
I
= V
CC
or GND
0.25
100
2.5
3.5
4.5
9
5.5
5
9
20
8
8
15
ohm
M in.
M ax.
1.8
±5
Units
V
µA
mA
µA
mA
pF
One input at 3.4V, Other at V
CC
or GND
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.
E
This is the increase in supply current for each input that is at the specified TTL voltage level rather the V
CC
or GND.
=
All typical values are at V
CC
= 5V, T
A
= 25°C.
2
PS8369B
12/15/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C
20-Bit, Hot Insertion, BusSwitch with
Precharged Outputs & Undershoot Protection
Truth Table
OE
L
H
Function
A port = B port
A port = Z, B Port = BIASV
Switching Characteristics
(Over Recommended Operating Free-air Temperature Range, C
L
= 50pF)
Parame te r
t
PD
t
PZH
t
PZL
t
PHZ
t
PLZ
BIASV = GND
BIASV = 3V
BIASV = GND
BIASV = 3V
Te s t Conditions
From
(Input)
A or B
ON
To
(Output)
B or A
A or B
3.1
3.0
2.0
3
V
CC
= 5V ± 0.5V
M in.
M ax.
0.25
5
5
5
5
V
CC
= 4V
M in.
M ax.
0.25
6
6
5.5
5.5
ns
Units
ON
A or B
Notes:
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).
Parameter Measurements
7V
From Output
Under Test
C
L
= 50pF
(See note 1)
500
ohm
S1
Open
GND
Te s t
tpd
t
PLZ
/t
PZL
S1
O pen
7V
O pen
3V
500
ohm
t
PHZ
/t
PZH
Output
Control
(Low Level
Enabling)
LOAD CIRCUIT
3V
Input
t
PLH
1.5V
1.5V
1.5V
0V
t
PHL
V
OH
Output
1.5V
V
OL
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
1.5V
t
PZL
1.5V
t
PLZ
1.5V
0V
3.5V
V
OL
+0.3V
V
OL
V
OH
Output
Waveform 1
S1 at 6V
(see Note 2)
Output
Waveform 2
S1 at Open
(see Note 2)
t
PZH
1.5V
t
PHZ
V
OH
-0.3V
0V
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
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
= 50Ω, 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
.
PS8369B
12/15/01
3
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C
20-Bit, Hot Insertion, BusSwitch with
Precharged Outputs & Undershoot Protection
48-pin BQSOP (B)
48
.150
.157
3.80
4.00
.228
.244
5.80
6.20
Gauge Plane
.010 0.25
BSC
.386
.394
9.80
10.00
.020
.029
0.50
0.75
1
.015 0.381 x 45˚
.008 0.20 Nom
Nom
.063 1.60
.079
2.0 Max
.002 0.05
.009 0.25
.014 0.356 REF
5˚
.0157 BSC
0.40
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.0051
.009
0.13
0.23
48-pin TSSOP (A)
48
.236
.244
6.0
6.2
1
.488 12.4
.496 12.6
.047
1.20 Max
SEATING PLANE
.004 0.09
.008 0.20
0.45 .018
0.75 .030
.319
BSC
8.1
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.0197
BSC
0.50
.007
.010
0.17
0.27
.002
.006
0.05
0.15
4
PS8369B
12/15/01
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI5C16215C
20-Bit, Hot Insertion, BusSwitch with
Precharged Outputs & Undershoot Protection
48-pin SSOP (V)
48
.291
.299
7.39
7.59
.395
.420
10.03
10.67
Gauge Plane
.010 0.25
1
.620
.630
15.75
16.00
.02 0.51
.04 1.01
.008
0.20
Nom.
.015 0.381 x 45˚
.025 0.635
.110 2.79 Max
.025 BSC
0.635
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.008 0.20
.0135 0.34
0-8˚
.008 0.20
.016 0.40
Ordering Information
Part
PI5C16215CB
PI5C16215CA
Pin - Package
48 - BQSOP (B48)
48 - TSSOP (A48)
Width
150- mil
240- mil
Applications Information
Logic Inputs
The logic control inputs can be driven up to +5.5V regardless of the
supply voltage. For example, given a +5.0V supply, IN may be driven
low to 0V and high to 5.5V. Driving IN Rail-to-Rail® minimizes power
consumption.
Proper power-supply sequencing is recommended for all CMOS
devices. Always apply V
CC
before applying signals to the bias
voltage pin and the input/output or control pins.
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd
Power-Supply Sequencing
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
5
PS8369B
12/15/01
京公网安备 11010802033920号
EEWORLD
