PERICOM PI3VT32X245B

PI3VT32X245
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16-Bit, 2-Port, Low Voltage
Translator Bus Switch
Product Features
Product Description
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Pericom Semiconductor’s PI3VT series of logic circuits are produced
using the Company’s advanced submicron CMOS technology,
achieving industry leading performance.
Near zero propagation delay
Low ON resistance switches connect inputs to outputs
2.5V Supply Voltage Operation
2.5V or 1.8V switching
Packages available:
– 40-pin, 150 mil wide plastic BQSOP (B)
The PI3VT32X245, is a 2.5V or 3.3V 8-bit, 2-port bus switch, is
designed with a low ON resistance (5 ohms). The switches are
turned ON or enabled by the Bus Enable (BEn) input signal.
Given a 3.3V supply and an input voltage of 3.3V, the switch
translates to an output voltage of 2.5V. Similarly, when operated
with a 2.5V supply and given 2.5V inputs, the device translates the
outputs to 1.8V.
Applications
• 3.3V to 2.5V level shifting (voltage translation)
• 2.5V to 1.8V level shifting (voltage translation)
Logic Block Diagram
A0
A7
Product Pin Configuration
B0
B7
BE1
A8
A15
B8
B15
BE2
A16
A23
B16
B23
BE3
A24
A31
B24
B31
NC
1
40
VCC
A0
2
39
BE1
A1
3
38
B0
A2
4
37
B1
A3
5
36
B2
A4
6
35
B3
A5
7
34
B4
A6
8
33
B5
A7
9
32
B6
40-Pin
B
GND
10
31
B7
NC
11
30
VCC
A8
12
29
BE2
A9
13
28
B8
A10
14
27
B9
A11
15
26
B10
A12
16
25
B11
A13
17
24
B12
A14
18
23
B13
A15
19
22
B14
GND
20
21
B15
BE4
1
PS8532
03/19/01
PI3VT32X245
16-Bit, 2-Port, Low Voltage
Translator Bus Switch
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Truth Table(1)
Product Pin Description
Pin Name
I/O
D e s cription
Function
BEN
A0-15
BEN
I
Bus Enable Input (Active LO W)
Disconnect
H
Hi- Z
A0- A15
I/O
Bus A
Connect
L
B0- 15
B0- B15
I/O
Bus B
Notes:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Note:
Storage Temperature .................................... –65°C to +150°C
Stresses greater than those listed under MAXIMUM RATINGS
Ambient Temperature with Power Applied .... –40°C to +85°C
may cause permanent damage to the device. This is a stress rating
Supply Voltage to Ground Potential ................... –0.5V to +4.6V
only and functional operation of the device at these or any other
DC Input Voltage ............................................. –0.5V to +5.5V
conditions above those indicated in the operational sections of this
specification is not implied. Exposure to absolute maximum rating
DC Output Current ...................................................... 120mA
conditions for extended periods may affect reliability.
Power Dissipation ........................................................... 0.5W
DC Electrical Characteristics (Over Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Parame te rs
De s cription
Te s t Conditions (1)
M in.
Typ.(2)
M ax.
VIH
Input HIGH Voltage
Guaranteed Logic HIGH Level
1.8
VCC +0.3V
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
High Impedance Output Current
0 ≤ A, B ≤ VCC
±1
IOZH
RON
VP
Switch On Resistance
Pass Voltage
VCC = Min., VIN = 0.0V, ION = 8mA
5
8
VCC = Min., VIN = 1.7V, ION = 8mA
10
22
VCC = 2.3V, VIN = 0.0V, ION = 8mA
6
9
VCC = 2.3V, VIN = 1.3V, ION = 8mA
25
30
2.5
2.9
VIN = VCC = 3.3V, IOUT = –5µA
VIN = VCC = 2.5V, IOUT = –5µA
2
2.3
Units
V
µA
Ω
V
1.8
PS8532
03/19/01
PI3VT32X245
16-Bit, 2-Port, Low Voltage
Translator Bus Switch
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Capacitance (TA = 25°C, f = 1 MHz)
Parame te rs (5)
De s cription
CIN
Input Capacitance
C O FF
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. 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.
Power Supply Characteristics
Parame te rs
De s cription
ICC
Quiescent Power
Supply Current
∆ICC
Quiescent Current
per Input HIGH
Te s t Conditions (1)
Typ.(2)
M in.
M ax.
VIN = GND or VCC
Units
6
VCC = Max.
µA
VIN
=
3V(3)
50
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 driven input (control input only); A and B pins do not contribute to ∆ICC.
Switching Characteristics over 3.3V ±0.3V Operating Range
Parame te rs
Condition(1)
De s cription
tPLH
tPHL
Propagation Delay(2,3)
Ax to Bx
tPZH
tPZL
Bus Enable Time
BE to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BE to Ax or Bx
Com
M in.
CL = 50pF,
RL = 500 ohms
CL = 50pF,
RL = 500 ohms
R = 500 ohms
3
M ax.
Units
0.25
1.5
6.5
1.5
5.5
ns
PS8532
03/19/01
PI3VT32X245
16-Bit, 2-Port, Low Voltage
Translator Bus Switch
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Switching Characteristics over 2.5V ±0.2V Operating Range
Parame te rs
Condition(1)
D e s cription
tPLH
tPHL
Propagation Delay(2,3)
Ax to Bx
tPZH
tPZL
Bus Enable Time
BE to Ax or Bx
tPHZ
tPLZ
Bus Disable Time
BE to Ax or Bx
Com
M in.
CL = 50pF,
RL = 500 ohms
CL = 50pF,
RL = 500 ohms
R = 500 ohms
M ax.
Units
0.25
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.
40-pin BQSO Package (Q40)
X.XX
X.XX
DENOTES DIMENSION IN MILLIMETERS
Notes:
1. Controlling dimensions in millimeters
2. Ref.: JEDEC MO - 154 BB
Ordering Information
Part
Pin-Package
Te mpe rature
PI3VT32X245B
40- BQSOP (B)
–40ºC to +85ºC
Pericom Semiconductor Corporation
2380 Bering Drive • San Jose, CA 95131 • 1-800-435-2336 • Fax (408) 435-1100 • http://www.pericom.com
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PS8532
03/19/01