PI2BV3877 Datasheet, PDF (1/4 Pages) Pericom Semiconductor Corporation – 2-Port 266 MHz DDR BusSwitch

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2.5V, 10-Bit, 2-Port
266 MHz DDR BusSwitch
Product Features
• Used in X4 DDR modules
• 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
• Pull-up on Switch Enable
• Packages available:
– 24-pin 150 mil wide plastic QSOP (Q)
– 24-pin 173 mil wide plastic TSSOP (L)
Product Description
Pericom Semiconductor’s PI2B series of logic circuits are produced
using the Company’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
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8??
*-
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Product Pin Configuration
*
BE0
1
24
VCC
A0
2
23
B0
A1
3
22
B1
*"
A2
4
21
B2
A3
5 _24-Pin 20
B3
A4
6 ^{Q, L} 19
B4
A5
7
18
B5
A6
8
17
B6
*#
A7
9
16
B7
A8
10
15
B8
A9
11
14
B9
*'
GND
12
13
BE1
8??
*-
Product Pin Description
Pin Name
Description
BE0, BE1
Bus Enable Input (Active LOW)
A0–9
Bus A
B0–9
Bus B
GND
Ground
V_CC
Power
Truth Table⁽¹⁾
Function
Disconnect
Connect
BE0 A0–A4
H Hi-Z
L B0–4
Function
Disconnect
Connect
BE1 A5–A9
H Hi-Z
L B5–B9
Notes: 1. H = High Voltage Level
L = Low Voltage Level
Hi-Z = High Impedance
1
PS8472A 05/02/00