ETC PI5C34X2245B

PI5C34X2245
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32-Bit, 2-Port Bus Switch
with 25-Ohm Series Resistor
Product Features
Product Description
•
•
•
•
•
Near-zero propagation delay
25-ohm series resistor termination
5-ohm 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
• Packages available:
– 80-pin 150 mil wide plastic BQSOP (B)
– 80-pin plastic very Fine Pitch dual flat No lead (DFN) Z)
Pericom Semiconductor’s PI5C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology.
The 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 25-ohm resistor to reduce noise resulting
from reflection, thus eliminating the need for an external
terminating resistor.
Product Pin Configuration
NC
A0
A1
A2
A3
A4
Logic Block Diagram
A0
B0
A7
A5
A6
A7
B7
GND
NC
A8
BE1
A8
B8
A15
B15
A9
A10
A11
A12
A13
A14
A15
BE2
GND
A16
B16
B23
NC
A16
A17
A18
A19
A20
A24
B24
A21
A22
A23
A31
B31
GND
NC
A24
A23
BE3
A25
BE4
A26
A27
A28
A29
A30
A31
Truth Table(1)
Function
BEn
A0 – 31
Disconnect
H
Hi- Z
Connect
L
B0 – 31
GND
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
80-Pin
B, Z
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
80
79
78
77
76
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
VCC
BE1
B0
B1
B2
B3
B4
B5
B6
B7
VCC
BE2
B8
B9
B10
B11
B12
B13
B14
B15
VCC
BE3
B16
B17
B18
B19
B20
B21
B22
B23
VCC
BE4
B24
B25
B26
B27
B28
B29
B30
B31
Product Pin Description
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Pin Name
BEn
1
I/O
I
D e s cription
Bus Enable Input (Active LO W)
A0- A31
I/O
Bus A
B0- B31
I/O
Bus B
PS8196A
08/06/01
PI5C34X2245
32-Bit, 2-Port BusSwitch
with 25-Ohm Series Resistor
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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 ........................................ –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 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%)
Parame te rs
De s cription
Te s t Conditions (1)
M in.
Typ(2)
M ax.
Units
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
VCC = Max., VIN = VCC
—
—
±1
IIL
Input LOW Current
VCC = Max., VIN = GND
—
—
±1
IOZH
High Impedance Output Current
0 - A, B - VCC
—
—
±1
VIK
Clamp Diode Voltage
VCC = Min., IIN = –18mA
—
–0.7
–1.2
V
A (B) = 0V, B (A) = VCC
100
—
—
mA
VCC = Min., VIN = 0.0V, ION = 48mA
—
28
40
VCC = Min., VIN = 2.4V, ION = 15mA
—
35
48
Current(3)
IOS
Short Circuit
RON
Switch On Resistance(4)
V
µA
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parame te rs (5)
D e s cription
CIN
Input Capacitance
C O FF
A/B Capacitance, Switch O ff
CON
A/B Capacitance, Switch O n
Te s t Conditions
Typ.
Units
6
VIN = 0V
6
pF
12
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 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
PS8196A
08/06/01
PI5C34X2245
32-Bit, 2-Port BusSwitch
with 25-Ohm Series Resistor
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Power Supply Characteristics
Parame te rs
ICC
Te s t Conditions (1)
D e s cription
Q uiescent Power Supply Current
M in. Typ(2) M ax. Units
VCC = Max.
VIN = GND or VCC
––
0.1
3.0
µA
3.4V(3)
––
––
2.5
mA
––
––
0.25
mA/
MHz
∆ICC
Supply Current per Input @ TTL HIGH
VCC = Max.
ICCD
Supply Current per Input per MHz(4)
VCC = Max.,
A & B Pins O pen
BEn = GND,
Control Input
Toggling
50% Duty Cycle
VIN =
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.
PI5C34X2245 Switching Characteristics over Operating Range
PI5C34X2245
Com.
Parame te r
Conditions (1)
D e s cription
tPLH
tPHL
Propagation Delay(2,3)
AX to Bx, Bx to Ax
tPZH
tPZL
Bus Enable Time
BEx to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BEx to Ax or Bx
M in.
M ax.
Units
1.25
CL = 50pF
RL = 500 ohms
1.5
7.5
1.5
5.5
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
PS8196A
08/06/01
PI5C34X2245
32-Bit, 2-Port BusSwitch
with 25-Ohm Series Resistor
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80-Pin 150 Mil Wide Plastic BQSOP (B) Package
80
41
.150
.157
3.80
4.00
.228
.244
5.80
6.20
.008 NOM
0.203
Gauge Plane
5˚
1
0.50
.019
REF
0.803
0.811
20.40
20.60
.010
.016
.063
1.60
Nom
0.254 x 45˚
0.406
.078
2.0
Max
5˚
.007
.010
0.17
0.27
.0197
BSC
0.50
.010
0.254 BSC
.019 0.50
.029 0.75
40
.002
.009
0.05
0.25
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
80-Pin Plastic Very Fine Pitch Dual Flat No lead (DFN) (Z) Package
.020
0.50 BSC
.033
0.84 MAX
.00
.0016
STANDOFF 0.00
0.04
0.10 M C A B
.007
.011
0.17
0.27
LEAD THICKNESS
.232
.240
5.90
6.10
.008
0.20 NOM
.803
.811
20.40
20.60
.115
2.925 NOM
2 PLACES
.014
.016
0.35 4 PLACES
.040
.033
0.85 NOM
2 PLACES
.035
0.90 NOM
Ordering Information
Part
Pin
Package
Te mpe rature
PI5C34X2245B
80 BQ SO P (B)
–40°C to +85°C
PI5C34X2245Z
80
–40°C to +85°C
DFN (Z)
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS8196A
08/06/01