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Datasheet: PI2BV3867 (Pericom Semiconductor Corporation)

2.5V, 10-bit, 2-Port, 266 MHZ DDR Bus Switch

 

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Pericom Semiconductor Corporation
1
PS8471D 10/10/01
VCC
B0
B1
B2
B3
B4
B5
B6
B7
B8
B9
BE
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
NC
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
GND
Logic Block Diagram
Product Pin Configuration
Product Pin Description
Truth Table
(1)
Notes:
H
= High Voltage Level
L
= Low Voltage Level
Hi-Z = High Impedance
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PI2BV3867
2.5V, 10-Bit, 2-Port
266 MHz DDR Bus Switch
Product Description
Pericom Semiconductors PI2BV series of logic circuits are produced
using the Companys advanced submicron CMOS technology,
achieving industry leading performance.
The PI2BV3867 is a 10-bit, 2.5 volt two-port bus switch 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.
The PI2BV3867 switch is intended for 266 MHz DDR (x8) Memory
Module Applications.
Product Features
Used in x8 DDR Memory Module
Near zero propagation delay
20-ohm switches connect inputs to outputs
Fast Switching Speed 3ns (max.)
Low Off Capacitance (3pF)
Pull-down on B output
Packages available:
24-pin 150 mil wide plastic QSOP (Q)
24-pin 173 mil wide plastic TSSOP (L)
24-Pin
L, Q
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A9
A0
B9
B0
2
PS8471D 10/10/01
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PI2BV3867
2.5V, 10-Bit, 2-Port
266 MHz DDR Bus Switch
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k
DC Electrical Characteristics
(Over the Operating Range, T
A
= 0C to +85C, V
CC
= 2.3V to 2.7V)
Storage Temperature ...........................................................65C to +150C
Ambient Temperature with Power Applied .......................... 40C to +85C
Supply Voltage to Ground Potential .......................................0.5V to +4.6V
DC Input Voltage ....................................................................0.5V to +4.6V
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 condi-
tions above those indicated in the operational sec-
tions of this specification is not implied. Exposure to
absolute maximum rating conditions for extended
periods may affect reliability.
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device type.
2. Typical values are at V
CC
= 2.5V, T
A
= 25C 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.
5. Pull-down resistance is measured with the switch OFF and calculated by V
BIAS(B-Ports)
/I
OZH
.
Maximum Ratings
(Above which the useful life may be impaired. For user guidelines, not tested.)
Capacitance
(T
A
= 25C, f = 1 MHz)
Power Supply Characteristics
Notes:
1. For Max. or Min. conditions, use appropriate value specified under Electrical Characteristics for the applicable device.
2. Typical values are at V
CC
= 2.5V, +25C ambient.
3. Per LVTTL driven input (control input only); A and B pins do not contribute to I
CC
.
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3
PS8471D 10/10/01
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PI2BV3867
2.5V, 10-Bit, 2-Port
266 MHz DDR Bus Switch
Switching Characteristics over Operating Range
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 load capacitance.
The time constant for the switch alone is of the order of 1ns 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 switch's driving side and its interaction with the load on the driven side.
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3
Parameter Measurements
VOLTAGE WAVEFORMS
PROPAGATION DELAY TIMES
VOLTAGE WAVEFORMS
ENABLE AND DISABLE TIMES
t
s
e
T
1
S
t
D
P
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p
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t
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L
P
t/
L
Z
P
V
x
2
C
C
t
Z
H
P
t/
H
Z
P
D
N
G
Notes:
1. C
L
includes probe and jig capacitance.
2. Waveform 1 is for an output with internal conditions such that the output is LOW except when disabled by the output control.
Waveform 2 is for an output with internal conditions such that the output is HIGH except when disabled by the output control.
3. All input pulses are supplied by generators having the following characteristics: PRR<10MHz, Z
O
= 50 ohms, t
R
2ns, t
F
2ns.
4. The outputs are measured one at a time with one transition per measurement.
5. t
PLZ
and t
PHZ
are the same as t
DIS
.
6. t
PZL
and t
PZH
are the same as t
EN
.
7. t
PLH
and t
PHL
are the same as t
PD
.
Input
t
PLH
t
PHL
V
CC
V
CC
/2
V
CC
/2
V
CC
/2
V
CC
/2
0V
Output
V
OH
V
OL
t
PZL
Output
Control
(Low Level
Enabling)
0V
V
CC
/2
V
CC
/2
V
CC
/2
V
CC
/2
t
PLZ
t
PHZ
V
OL
V
OH
0V
t
PZH
+0.15V
-0.15V
Output
Waveform 1
S1 at 2xV
CC
(see Note 2)
Output
Waveform 2
S1 at GND
(see Note 2)
V
OH
V
OH
V
OL
V
CC
500
500
GND
2xV
CC
Open
S1
LOAD CIRCUIT
From Output
Under Test
C
L
= 30pF
(See note 1)
4
PS8471D 10/10/01
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PI2BV3867
2.5V, 10-Bit, 2-Port
266 MHz DDR Bus Switch
t
r
a
P
e
g
a
k
c
a
P
-
n
i
P
e
r
u
t
a
r
e
p
m
e
T
Q
7
6
8
3
V
B
2
I
P
)
Q
(
P
O
S
Q
-
4
2
C
5
8
+
o
t
C
0
L
7
6
8
3
V
B
2
I
P
)
L
(
P
O
S
S
T
-
4
2
Ordering Information
Pericom Semiconductor Corporation
2380 Bering Drive San Jose, CA 95131 1-800-435-2336 Fax (408) 435-1100 http://www.pericom.com
.337
.344
.053
.069
.004
.010
SEATING
PLANE
.025
typical
.007
.010
.228
.244
1
24
.150
.157
.016
.050
X.XX
X.XX
DENOTES DIMENSIONS
IN MILLIMETERS
0.635
8.56
8.74
1.35
1.75
5.79
6.20
0.406
1.27
0.101
0.254
.008
.012
0.203
0.305
3.81
3.99
0.178
0.254
.033
0.84
0.38
.015 x 45
Detail A
Detail A
.008
0.20
MIN.
Guage Plane
.010
0.254
.041
1.04
REF
.016
.035
0.41
0.89
0-6
.008
.013
0.20
0.33
.303
.311
.047
1.20
.002
.006
SEATING
PLANE
.0256
BSC
.018
.030
.004
.008
.252
BSC
1
24
.169
.177
X.XX
X.XX
DENOTES CONTROLLING
DIMENSIONS IN MILLIMETERS
0.05
0.15
6.4
0.45
0.75
0.09
0.20
4.3
4.5
7.7
7.9
0.65
0.19
0.30
.007
.012
Max
24-pin TSSOP (L) Package
24-pin QSOP (Q) Package
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