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21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
21098765432121098765432109876543210987654321210987654321098765432109876543212109876543210987654321098765432121098765432109876543210987654321
PI2BV3877
2.5V, 10-Bit, 2-Port
266 MHz DDR BusSwitch
Product Features
聲 Used in X4 DDR modules
聲 Near zero propagation delay
聲 20 Ohm switches connect inputs to outputs
聲 Fast Switching Speed 聳3ns (max.)
聲 Low Off Capacitance (3pF)
聲 Pull-down on B output
聲 Pull-up on Switch Enable
聲 Packages available:
聳 24-pin 150 mil wide plastic QSOP (Q)
聳 24-pin 173 mil wide plastic TSSOP (L)
Product Description
Pericom Semiconductor聮s PI2B series of logic circuits are produced
using the Company聮s advanced submicron CMOS technology,
achieving industry leading performance.
The PI2BV3877 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
N
) input signals.
The PI2BV3877 switch is intended for 266 MHz DDR(X4) Memory
Module Applications.
Logic Block Diagram
)
*
Product Pin Configuration
BE
0
A
0
A
1
A
2
A
3
A
4
A
5
A
6
A
7
A
8
A
9
GND
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
)
"
8??
*-
)
#
*
"
24-Pin
Q, L
20
19
18
17
16
15
14
13
*
#
)
'
8??
*
'
V
CC
B
0
B
1
B
2
B
3
B
4
B
5
B
6
B
7
B
8
B
9
BE
1
Truth Table
(1)
*-
Function
Disconnect
Connect
Function
Disconnect
Connect
BE0
H
L
BE1
H
L
A
0聳A4
Hi-Z
B
0聳4
A
5聳A9
Hi-Z
B
5聳B9
Product Pin Description
Pin Name
BE0, BE1
A0聳9
B0聳9
GND
V
CC
Description
Bus Enable Input (Active LOW)
Bus A
Bus B
Ground
Power
1
Notes:
1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
PS8472A
05/02/00
1
2
3
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