PS7058H 05/12/06
1
Features
• Near-Zero propagation delay
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• Ultra-low quiescent power (0.2µA typical)
– Ideally suited for notebook applications
• Industrial operating temperature: –40°C to +85°C
• Packaging (Pb-free & Green available):
– 80-pin BQSOP (B)
PI5C34X245
Block Diagram Pin Conguration
Description
The PI5C34X245 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.
32-Bit, 2-Port Bus Switch
BE1
A7
A0
B7
B0
BE2
A15
A8
B15
B8
BE3
A23
A16
B23
B16
BE4
A31
A24
B31
B24
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
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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
NC
A0
A1
A2
A3
A4
A5
A6
A7
GND
NC
A8
A9
A10
A11
A12
A13
A14
A15
GND
NC
A16
A17
A18
A19
A20
A21
A22
A23
GND
NC
A24
A25
A26
A27
A28
A29
A30
A31
GND
06-0238
PI5C34X245
32-Bit, 2-Port Bus Switch
PS7058H 05/12/06
2
DC Electrical Characteristics (Over the Operating Range, TA = –40°C to +85°C, VCC = 5V ±10%)
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 RAT-
INGS 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 specication is not implied. Ex-
posure to absolute maximum rating conditions for extended
periods may affect reliability.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Parameters Description Test Conditions(1) Min. Typ(2) Max. Units
VIH Input HIGH Voltage Guaranteed Logic HIGH Level 2.0 V
VIL Input LOW Voltage Guaranteed Logic LOW Level –0.5 0.8
IIH Input HIGH Current VCC = Max., VIN = VCC ±1
µA 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
IOS Short Circuit Current(3) A (B) = 0V, B (A) = VCC 100 mA
VHInput Hystersis at Control Pins V
RON Switch On-Resistance(4) VCC = Min., VIN = 0V, ION = 48mA 5 7 Ω
VCC = Min., VIN = 2.4V, ION = 15mA 10 15
Pin Description
Truth Table(1)
Note:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Function BEn A0-A31
Disconnect H Hi-Z
Connect L B0-31
Pin Name I/O Description
BEXI Bus Enable Input (Active LOW)
A0-A31 I/O Bus A
B0-B31 I/O Bus B
Notes:
1. For Max. or Min. conditions, use appropriate value specied 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.
06-0238
PI5C34X245
32-Bit, 2-Port Bus Switch
PS7058H 05/12/06
3
Parameters Description Test Conditions(1) Min. Typ(2) Max. Units
ICC Quiescent Power Supply Current VCC = Max. VIN = GND
or VCC 0.1 3.0 µA
∆ICC Supply Current per Input @ TTL
HIGH VCC = Max. VIN = 3.4V(3) 2.5 mA
ICCD Supply Current per Input per MHz(4)
VCC = Max.,
A & B Pins Open
Control Input Toggling
50% Duty Cycle
0.25 mA/
MHz
Power Supply Characteristics
Notes:
1. For Max. or Min. conditions, use appropriate value specied 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 specied frequency. The
A and B inputs generate no signicant AC or DC currents as they transition. This parameter is not tested, but is guaranteed by design.
Notes:
1. This parameter is guaranteed but not tested on Propagation Delays.
2. 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.
Parameter Description Conditions
PI5C34X245
UnitsCom.
Min. Max.
tPLH
tPHL
Propagation Delay(1,2)
Ax to Bx, Bx to Ax
CL = 50pF
RL = 500Ω
0.25
ns
tPZH
tPZL Bus Enable Time BEx to Ax or Bx 1.5 5.6
tPHZ
tPLZ Bus Disable Time BEx to Ax or Bx 1.5 5.2
Switching Characteristics over Operating Range
Capacitance (TA = 25°C, f = 1 MHz)
Notes:
1. This parameter is determined by device characterization but is not production tested.
Paramaters(1) Description Test Conditions Max. Units
CIN Input Capacitance
VIN = 0V
6
pFCOFF A/B Capacitance, Switch OFF 6
CON A/B Capacitance, Switch ON 12
06-0238
PI5C34X245
32-Bit, 2-Port Bus Switch
PS7058H 05/12/06
4
Packaging Mechanical: 80-Pin, 150 Mil Wide Plastic BQSOP (B)
3.80
4.00
0.254
.0197
0.50
5˚
Gauge Plane
.150
.157
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
.228
.244
5.80
6.20
.010
.063
.010
.016
0.254
0.406
0.803
0.811
20.40
20.60
.007
.010
0.17
0.27
40
80
x 45˚
41
1
.019
1.60
.002
.009
0.05
0.25
.078
2.0
5˚
.019
.029
0.50
0.75
.008 NOM
0.203
0.50
REF
BSC
Max
Nom
BSC
Ordering Information
Notes:
• Thermal characteristics can be found on the company web site at www.pericom.com/packaging/
• E = Pb-free & Green
• Adding an X sufx = Tape/Reel
Ordering Code Packaging Code Package Type
PI5C34X245B B 80-Pin 150 Mil Wide Plastic BQSOP
PI5C34X245BE B Pb-free & Green, 80-Pin 150 Mil Wide Plastic BQSOP
Pericom Semiconductor Corporation • 1-800-435-2336 • www.pericom.com
06-0238
