PERICOM PI3B32X245

PI3B32X245
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3.3V, Hot Insertion 16-Bit, 2-Port Bus Switch
Product Features
Product Description
• Fast Switching Speed: 4.5ns max.
Pericom Semiconductor’s PI3B series of logic circuits are produced
using the Company’s advanced submicron CMOS technology.
• Permits Hot Insertion
The PI3B32X245 is a 3.3V,16-bit, 2-port bus switch. Two enable
signals (BEn) turn the switches on. The bus switch creates no
additional propagational delay or additional ground bounce noise.
• Near-zero propagation delay
• 5Ω switches connect inputs to outputs
• Direct bus connection when switches are ON
• Ultra-low quiescent power (1.0µA typical)
– Ideally suited for notebook applications
Product Pin Configuration
• Industrial operating temperature: –40°C to +85°C
• TTL - compatible control of input levels
• Packages available:
NC
A0
A1
A2
A3
A4
A5
A6
A7
– 40-pin 150 mil wide plastic BQSOP (B)
Logic Block Diagram
A0
B0
A7
B4
GND
NC
A8
A9
A10
A11
A12
A13
A14
A15
GND
BE1
A8
B8
A15
B15
BE2
VCC
BE1
B0
B1
B2
B3
B4
B5
B6
B7
VCC
BE2
B8
B9
B10
B11
B12
B13
B14
B15
Product Pin Description
Truth Table(1)
Function
Disconnect
Connect
1
40
2
39
3
38
4
37
5
36
6
35
34
7
8 40-Pin 33
B
32
9
31
10
30
11
29
12
28
13
27
14
26
15
25
16
24
17
23
18
22
19
21
20
BEn
H
L
A0–15
Hi-Z
B0–15
Pin Name
BEn
A0-A15
B0-B15
Notes:
1. H= High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
1
I/O
I
I/O
I/O
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
PS8337A
03/31/99
PI3B32X245
3.3V,
Hot
Insertion
16-Bit,
2-Port
BusSwitch
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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 +4.6V
Supply Voltage to Ground Potential (Outputs & D/O Only) –0.5V to +4.6V
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 = 3.3V ±10%)
Parame te rs
Te s t Conditions (1)
D e s cription
M in.
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
2.0
VIL
Input LO W Voltage
Guaranteed Logic LO W Level
- 0.5
IIH
Input HIGH Current
VCC = Max., VIN = VCC
IIL
Input LO W Current
VCC = Max., VIN = GND
IOZH
High Impedence O utput Current
0 ≤ A, B ≤ VCC
VIK
Clamp Diode Voltage
VCC = Min., INN = - 18mA
RON
Switch O n Resistance(4)
Typ.(2) M ax. Units
VCC = Min., VIN = 0.0V, ION = 48mA or 64mA
VCC = Min., VIN = 2.4V, ION = 15mA
0.8
V
±1
µA
- 1.2
V
5
8
10
17
Ω
Capacitance (TA = 25°C, f = 1 MHz)
Parameters(5)
Description
Test Conditions
Typ.
Units
CIN
COFF
Input Capacitance
A/B Capacitance, Switch Off
VIN = 0V
VIN = 0V
3.5
8.0
pF
pF
CON
A/B Capacitance, Switch On
VIN = 0V
16.0
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 = 3.3V, 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
PS8337A
03/31/99
PI3B32X245
3.3V,
Hot
Insertion
16-Bit,
2-Port
BusSwitch
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Power Supply Characteristics
Test Conditions(1)
Parameters Description
Min.
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
∆ICC
Supply Current per
Input @ TTL HIGH
VCC = Max.
VIN = 3.0V(3)
Typ.(2)
Max.
Units
1.0
3.0
µA
750
µA
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at VCC = 3.3V, +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.
PI3B32X245 Switching Characteristics over Operating Range
Parameters Description
tPLH
tPHL
tPZH
tPZL
tPHZ
tPLZ
Propagation Delay(2,3)
Ax to Bx, Bx to Ax
Bus Enable Time
BEx to Ax or Bx
Bus Disable Time
BEx to Ax or Bx
Conditions(1)
CL= 50pF
RL= 500Ω
PI3B32X245
Com.
Min.
Max.
—
0.25
1.0
4.0
1.0
4.5
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.
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
3
PS8337A
03/31/99