ETC PI3VT3861L

PI3VT3861
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10-Bit, 2-Port, Low Voltage
Translator Bus Switch
Product Features
Product Description
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•
•
•
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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:
– 24-pin, 150 mil wide plastic QSOP (Q)
– 24-pin, 173 mil wide plastic TSSOP (L)
The PI3VT3861, either a 2.5V or 3.3V 10-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)
Product Pin Configuration
NC
1
24
VCC
A0
2
23
BE
A1
3
22
B0
A2
4
21
B1
A3
5
20
B2
A4
24-Pin
6
Q, L 19
A5
7
18
B4
A6
8
17
B5
A7
9
16
B6
A8
10
15
B7
A9
11
14
B8
GND
12
13
B9
Logic Block Diagram
A0
B0
A9
B9
BE
Truth Table(1)
B3
Product Pin Description
Function
BE
A0-9
Pin Name
De s cription
Disconnect
H
Hi- Z
BE
Bus Enable Input (Active LOW)
Connect
L
B0- 9
A0- 9
Bus A
B0- 9
Bus B
GND
Ground
VCC
Power
Notes:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
1
PS8534
10/03/01
PI3VT3861
10-Bit, 2-Port, Low Voltage
Translator Bus Switch
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Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
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.
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 +4.6V
DC Input Voltage .................................................................. –0.5V to +5.5V
DC Output Current ............................................................................120mA
Power Dissipation ................................................................................ 0.5W
DC Electrical Characteristics (Over Operating Range, TA = –40°C to +85°C, VCC = 3.3V ±10%)
Parame te rs
D e 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 LO W Voltage
Guaranteed Logic LO W Level
–0.5
0.8
IIH
Input HIGH Current
VCC = Max., VIN = VCC
±1
IIL
Input LO W Current
VCC = Max., VIN = GND
±1
High Impedance O utput Current
0 ≤ A, B ≤ VCC
±1
IOZH
RON
VP
Switch O n Resistance
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
Pass Voltage
VIN = VCC = 2.5V, IOUT = –5µA
2.3
Units
V
µA
Ω
V
1.8
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.
2
PS8534
10/03/01
PI3VT3861
10-Bit, 2-Port, Low Voltage
Translator Bus Switch
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Power Supply Characteristics
Test Conditions(1)
Parameters Description
Min.
Typ.(2) Max.
ICC
Quiescent Power
Supply Current
VCC = Max.
VIN = GND or VCC
3
∆ICC
Supply Current per
Input HIGH
VCC = Max.
VIN = 3V(3)
50
Units
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 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.
M ax.
CL = 50pF,
RL = 500 Ohms
CL = 50pF,
RL = 500 Ohms
R = 500 Ohms
Units
0.25
1.5
6.5
1.5
5.5
ns
Switching Characteristics over 2.5V ±0.2V 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
Units
M ax.
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.
3
PS8534
10/03/01
PI3VT3861
10-Bit, 2-Port, Low Voltage
Translator Bus Switch
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24-pin QSOP package (Q)
24
.008
0.20
MIN.
.150
.157
.008
.013
0.20
0.33
3.81
3.99
Guage Plane
.010
0.254
.016
.035
0.41
0.89
Detail A
1
.337
.344
0˚-6˚
.041
1.04
REF
8.56
8.74
.033
0.84
.053
.069
.015 x 45˚
0.38
1.35
1.75
Detail A
.007
.010
SEATING
PLANE
.025
typical
0.635
.008
.012
.004
.010
0.203
0.305
0.101
0.254
0.178
0.254
0.406
1.27
.016
.050
.228
.244
5.79
6.20
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
24-pin TSSOP package (L)
24
.169
.177
4.3
4.5
.004
.008
1
.303
.311
7.7
7.9
.0256
BSC
0.65
0.09
0.20
0.45 .018
0.75 .030
.047
1.20
Max
.002
.006
.007
.012
0.19
0.30
SEATING
PLANE
.252
BSC
6.4
0.05
0.15
X.XX DENOTES CONTROLLING
X.XX DIMENSIONS IN MILLIMETERS
Ordering Information
Part
Pin-Package
Te mpe rature
PI3VT3861L
24- TSSOP (L)
–40ºC to +85ºC
PI3VT3861Q
24- QSOP (Q)
–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
4
PS8534
10/03/01