PERICOM PI5C34171CA

PI5C34171C
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17-Bit to 34-Bit, Demux PCI Hot-Plug
Bus Switch with –2V Undershoot Protection
Product Features
Product Description
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Pericom Semiconductor’s PI5C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
RON is 5 Ohm typical
Undershoot protection on A port only: –2V
Industrial Operation Temperature: –40ºC to +85ºC
Near Zero propagation delay
Channel ON Capacitance: 15pF max.
VCC Operating Range: +5V±10%
ESD>2000V....Human Body Model
>100 MHz switching (enable clock rate)
at 20pF load capacitance
• Packages:
– 56-pin plastic TSSOP (A)
The PI5C34171C is a 17 to 34-bit demultiplexer bus switch. It is
intended for PCI Hot-Plug applications. Industry leading advantages
include a propagation delay of 250ps, resulting from 5-Ohm channel
resistance, and low I/O Capacitance. A port demultiplexes to either
1B and 2B or to both. The switch is bidirectional. The A port can
handle up to –2V undershoot during switch disable.
Application
Provides PCI Hot Plugging
Logic Block Diagram
Pin Description
1A
1B1
1B1
2B1
2A
3B1
4B1
4A
5B1
6B1
6A
7B1
8B1
8A
GND
V CC
9B1
10B1
10A
11B1
12B1
12A
13B1
14B1
14A
15B1
16B1
16A
17B1
SEL1
1B2
17A
17B1
17B2
SEL1
SEL2
Function
SEL1
SEL2
nA to nB1
L
H
nA to nB2
H
L
nA to nB1 and nB2
L
L
nB1, nB2 = Hi- Z
H
H
1
1
56
2
55
3
54
4
53
52
5
6
51
7
8
50
9
10
11
12
13
49
48
47
56-Pin
A
46
45
44
14
15
43
42
16
17
41
40
18
39
19
20
38
21
36
22
23
35
34
33
24
25
26
27
28
37
32
31
30
29
1A
1B2
2B2
3A
3B2
4B2
5A
5B2
6B2
7A
7B2
8B2
GND
9A
9B2
10B2
11A
11B2
12B2
13A
13B2
14B2
15A
15B2
16B2
17A
17B2
SEL2
PS8498A
11/15/00
PI5C34171C
17-Bit to 34-Bit, Demux PCI Hot-Plug
Bus Switch with –2V Undershoot Protection
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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
specification is not implied. Exposure to absolute 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%)
Te s t Conditions (1)
Parame te rs De s cription
M in.
Typ(2)
M ax.
Units
V
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
—
—
VIL
Input LOW Voltage
Guaranteed Logic LOW Level
–0.5
—
0.8
IIH
Input HIGH Current
VC C = Max., Vin = VC C
—
—
IIL
Input LOW Current
VC C = Max., Vin = GND
—
—
IO ZH
High Impedance Output Current
0 ≤ A, B ≤ VC C
—
—
VIK
Clamp Diode Voltage
VC C = Min., IIN = –18mA
—
RON
Switch On Resistance(4)
VC C = Min., VIN = 0.0V, IO N = 48mA
VUP
Undershoot Protection Voltage(3)
±1
µA
–0.7
–1.8
V
—
5
8
VC C = Min., VIN = 2.4V, IO N = 15mA
—
10
18
Max. Inputs, Undershoot Pulse Duration <25ns
—
—
–2.0
Ω
V
Notes:
1. For Min. or max. conditions, use appropriate value specfied under Electrical Characteristics for the applicable device type.
2. Typical values are at VCC = 5.0V, TA = 25°C ambient and maximum loading.
3. On AN (Data Input) pins only.
4. Measured by the voltage drop between A and B pins at indicated current through the switch. On resistance is determined by the
lower of the voltages on the two (A & B) pins.
Capacitance (TA = 25°C, f = 1 MHz)
Parame te rs (1)
De s cription
C IN
Input Capacitance
CO F F (B)
B Capacitance, Switch Off
CO N
A/B Capacitance, Switch On
Te s t Conditions
VIN = 0V
Typ.
M a x.
3.5
—
4.5
—
13 . 5
—
Units
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 pins 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
PS8498A
11/15/00
PI5C34171C
17-Bit to 34-Bit, Demux PCI Hot-Plug
Bus Switch with –2V Undershoot Protection
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Power Supply Characteristics
Parame te rs (1)
ICC
De s cription
Quiescent Power
Supply Current
Te s t Conditions
VCC = Max.
∆ICC
Supply Current per
VCC = Max.
Input @ TTL HIGH
ICCD
Supply Current per
Input per MHz(4)
M in.
VIN = GND or VCC
—
VIN = 3.4V(3)
other pin = VCC or GND
—
VCC = Max., A & B Pins Open
Control Input Toggling
50% Duty Cycle
—
Typ.(2) M ax.
—
—
Units
200
µA
2.5
mA
0.60
mA/
MHz
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.
5. Values for these conditions are examples of the ICC formula. These limits are guaranteed but not tested.
Switching Characteristics over Operating Range
PI5C34171C
Com
Parame te rs
De s cription
tP LH
tP HL
Propagation Delay(2,3)
A to B
tP ZH
tP ZL
Bus Enable Time
SEL to A,B
tP HZ
tP LZ
Bus Disable Time
SEL to A,B
Conditions
C L = 50pF
RL = 500Ω
M in.
Typ
M ax.
–
0.25
–
10
–
40
1
–
6
Units
ns
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 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.
3
PS8498A
11/15/00
PI5C34171C
17-Bit to 34-Bit, Demux PCI Hot-Plug
Bus Switch with –2V Undershoot Protection
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56-pin TSSOP (A)
56
.236
.244
1
.547
.555
6.0
6.2
13.9
14.1
1.20
.047
Max.
SEATING PLANE
.004 0.09
.008 0.20
.0197
BSC
0.50
.007
.011
0.17
0.27
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.002
.006
0.05
0.15
0.45 .018
0.75 .030
.319 BSC
8.1
Ordering Information
Part
Pin - Package
Width
PI5C34171CA
56- TSSOP (A)
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.
Power-Supply Sequencing
Proper power-supply sequencing is recommended for all CMOS
devices. Always apply VCC before applying signals to the 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
4
PS8498A
11/15/00