PI3VT34X245 Datasheet, PDF (4/4 Pages) Pericom Semiconductor Corporation – 32-Bit, 2-Port, Low Voltage Translator Bus Switch

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
t_PLH
t_PHL
Propagation Delay ^(2,3), Ax to Bx
C_L = 50pF
R_L = 500 ohms
—
0.25
t_PZH
t_PZL
Bus Enable Time; BE to Ax or Bx
C_L = 50pF
R_L = 500 ohms
t_PHZ
t_PLZ
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 _BSC
0.50
.007
.010
0.17
0.27
X.XX DENOTES DIMENSIONS
X.XX IN MILLIMETERS
.150 .228
.157 .244
3.80 5.80
4.00 6.20
40
.063
1.60
Nom
.078
2.0
Max
.002
.009
0.05
0.25
.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
5˚
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 [phone] • http://www.pericom.com
4
PS8531 03/19/01