PI3VT34X245B 데이터 시트보기 (PDF) - Pericom Semiconductor
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PI3VT34X245B Datasheet PDF : 4 Pages
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PI3VT34X245
32-Bit, 2-Port, Low Voltage
Translator Bus Switch 1122334455667788990011223344556677889900112233445566778899001122112233445566778899001122334455667788990011223344556677889900112211223344556677889900112233445566778899001122334455667788990011221122334455667788990011223344556677889900112233445566778899001122112233445566778899001122
Switching Characteristics over 2.5V ±0.2V Operating Range
Parameter
Test Conditions
Conditions(1)
Com.
Min.
Max.
Units
tPLH
tPHL
Propagation Delay (2,3), Ax to Bx
CL = 50pF
RL = 500 ohms
0.25
tPZH
tPZL
Bus Enable Time; BE to Ax or Bx
CL = 50pF
RL = 500 ohms
tPHZ
tPLZ
Bus Disable Time; BE to Ax or Bx
R = 500 ohms
1.5
9.8
ns
1.5
9.8
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.
80-pin BQSOP package (Q)
80
41
1
0.50
REF
.019
0.803
0.811
20.40
20.60
.0197
0.50
BSC
.007
.010
0.17
0.27
.150 .228
.157 .244
3.80 5.80
4.00 6.20
40
.008 NOM
0.203
5˚
.019 0.50
.029 0.75
Gauge Plane
.010
0.254 BSC
.010 0.254 x 45˚
.016 0.406
.063
1.60
Nom
.078
2.0
Max
.002
.009
0.05
0.25
5˚
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
Ordering Information
Part
Pin-Package
PI3VT34X245B 80-BQSOP (B)
Temperature
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
PS8531A
12/12/01
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