ETC PI3C32X384B

PI3C32X384
PI3C32X2384 (25ohm)
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
2.5V/3.3V, High Bandwidth, Hot Insertion
20-Bit, 2-Port, Bus Switch
Product Features
•
•
•
•
•
•
•
•
Product Description
Near-zero propagation delay
Low noise, 25ohm version (PI3C32X2384)
5ohm switches connect inputs to outputs (PI3C32X384)
High Bandwidth (>400 MHz)
Permits Hot Insertion.
5V I/O Tolerant
2.5V Supply Voltage Operation
Packages available:
– 48-pin 150-mil wide plastic BQSOP (B)
– 48-pin 240-mil wide plastic TSSOP (A)
Pericom Semiconductor’s PI3C series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry performance.
The PI3C32X384, and PI3C32X2384 are 2.5V or 3.3Volt, highbandwidth 20-bit, 2-port bus switches designed with a low ON
resistance allowing inputs to be connected directly to outputs.
The bus switch creates no additional propagational delay or
additional ground bounce noise. The switches are turned ON by the
Bus Enable (BE) input signal. Four bus enable signals are provided,
one for each of the upper and lower five bits of the two 10-bit buses.
The PI3C32X2384 is designed with an internal 25ohm resistor
reducing noise reflection in high-speed applications.
Applications
• High Bandwidth Data switching
• Hot Docking
Product Pin Configuration
Logic Block Diagram
A0
B0
A5
B5
BEA
B0
A0
A4
B4
A9
B9
A15
B15
A10
B10
A1
B1
B2
A2
A3
A19
B19
A14
B3
B4
B14
A4
GND
BEC
BEA
BEB
B5
A5
A6
BEC
B6
B7
BED
Truth Table
(1)
Function
Disconnect
Connect
Connect
Connect
Function
Disconnect
Connect
Connect
Connect
BEA
H
L
H
L
BEC
H
L
H
L
BE B
H
H
L
L
BED
H
H
L
L
B0-B4
Hi-Z
A4-A0
Hi-Z
A4-A0
B9-B5
Hi-Z
A9-A5
Hi-Z
A9-A5
B5-B9
Hi-Z
Hi-Z
A19-A15
A19-A15
B14-B10
Hi-Z
Hi-Z
A14-A10
A14-A10
48
47
46
45
44
43
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
A7
A8
B8
19
20
B9
22
23
24
A9
GND
21
48-Pin
A,B
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
VCC
B19
A19
A18
B18
B17
A17
A16
B16
B15
A15
BEB
VCC
B14
A14
A13
B13
B12
A12
A11
B11
B10
A10
BED
Product Pin Description
Pin Name
BEX
A19 - A0
B19 - B0
GND
VCC
Note:
1. H = High Voltage Level, X = Don’t Care,
L = Low Voltage Level, Hi-Z = High Impedance
1
Description
Bus Enable Inputs (Active LOW)
Bus A
Bus B
Ground
Power
PS8430A
12/10/99
PI3C32X384/PI3C32X2384 (25ohm)
2.5V/3.3V, High Bandwidth, Hot Insertion,
20-Bit, 2-Port BusSwitch
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
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 +5.5V
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 Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Parame te rs
Te s t Conditions (1)
De s cription
M in.
Typ.(2)
M ax.
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- Impedence Output Current 0 ≤ A, B ≤ VCC
—
—
±1
VIK
Clamp diode Voltage
—
–0.73
–1.2
PI3C32X384
—
5
7
PI3C32X2384
18
28
40
PI3C32X384
—
8
15
PI3C32X2384
18
35
48
RON
Switch On Resistance(3)
VCC = Min., IIN = –18mA
VCC = Min.,VIN = 0.0V
ION = 48mA or 64mA
VCC = Min.,VIN = 2.4V
ION = 15mA
Units
V
µA
V
Ω
Capacitance (TA = 25°C f = 1 MHz)
Parame te rs (4)
De s cription
CIN
Input Capacitance
COFF
A/B Capacitance, Switch Off
CON
A/B Capacitance, Switch On
Te s t Conditions
Typ.
Units
3.5
VIN = 0V
5.0
pF
10.0
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. 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.
4. This parameter is determined by device characterization but is not production tested.
2
PS8430A
12/10/99
PI3C32X384/PI3C32X2384 (25ohm)
2.5V/3.3V, High Bandwidth, Hot Insertion,
20-Bit, 2-Port BusSwitch
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
Power Supply Characteristics
Te s t Conditions (1)
Parame te rs
De s cription
ICC
Quiescent Power Supply Current
∆ICC
Supply Current per Input
@ TTL HIGH
VCC = Max.,
VIN = GND or VCC
PI3C32X384
PI3C32X2384
VCC = Max.,
VIN = 3.0V(3)
M in.
Typ.(2)
M ax.
—
0.50
1.0
Units
mA
—
—
2.5
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 (control inputs only); A and B pins do not contribute to ICC.
PI3C3384/PI3C32384 Switching Characteristics over 3.3V Operating Range
PI3C32X384
Parame te rs
D e s cription
tPLH
tPHL
Propogation 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
Conditions (1)
CL = 50pF
RL = 500ohm
CL = 50pF
RL = 500ohm
Units
Com.
M in.
M ax.
—
0.25
1.5
6.5
1.5
5.5
ns
PI3C3384/PI3C32384 Switching Characteristics over 2.5V Operating Range
PI3C32X2384
Parame te rs
D e s cription
tPLH
tPHL
Propogation Delay(2,3)
tPZH
tPZL
Bus Enable Time
BEx to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BEx to Ax or Bx
Ax to Bx, Bx to Ax
Conditions (1)
CL = 50pF
RL = 500ohm
CL = 50pF
RL = 500ohm
Units
Com.
M in.
M ax.
—
1.25
1.5
9.8
1.5
8.3
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
PS8430A
12/10/99
PI3C32X384/PI3C32X2384 (25ohm)
2.5V/3.3V, High Bandwidth, Hot Insertion,
20-Bit, 2-Port BusSwitch
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
12345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012123456789012
4.0
VCC = 3.3V
3.1V
2.9V
2.7V
2.5V
VOUT, (V)
2.3V
3.8V
3.6V
3.4V
3.2V
3.0V
2.8V
2.0
0.0
0.0
1.0
3.0
2.0
4.0
5.0
VIN, (V)
Output Voltage vs. Input Voltage over Various Supply Voltages
Ordering Information
Part
Pin - Package
Dime ns ions
PI3C32X384A
48 - TSSOP (A)
–40°C to +85°C
PI3C32X384B
48 - TSSOP (B)
–40°C to +85°C
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
4
PS8430A
12/10/99